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Massachusetts-Boston-100 Huntington Avenue Lease - Copley Place Associates Nominee Corp. and Neurotec International Corp.

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  • Commercial Lease. Start a state-specific lease for the rental of commercial property. Specify the term and rent due, as well as whether the landlord or tenant is responsible for property taxes, insurance, and maintenance and repairs.
  • Commercial Sublease. When a tenant vacates commercial property before the lease term has expired, it may be able to rent the premises to a third party. The tenant would be the sublessor and the third party would be the sublessee. Besides preparing a sublease, both parties will want to review the provisions for assignment or subletting in the original lease agreement between the landlord and the sublessor.
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  • Triple Net Lease. Triple net leases are a type of commercial leases where the tenant has to pay for property taxes, insurance, utilities, and maintenance, in addition to the monthly rent.
  • Office Space Lease. When renting an office space, tenants should understand the amount of the rent and duration of the lease. Other important terms include whether the space can be subleased, which parties are responsible for maintenance, and whether any furniture and furnishings will be provided.

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                                  COPLEY PLACE
                              BOSTON, MASSACHUSETTS
                                  OFFICE LEASE

                                       to

                          NEUROTEC INTERNATIONAL CORP.,
                             a Delaware corporation


                               FROM THE OFFICE OF:

                             Goulston & Storrs, P.C.
                               400 Atlantic Avenue
                        Boston, Massachusetts 02110-3333
<PAGE>   2
                                  OFFICE LEASE
                                  COPLEY PLACE
                              BOSTON, MASSACHUSETTS


                                TABLE OF CONTENTS


<CAPTION>
                                                                             PAGE
                                                                             ----

1.       BASIC DATA        ..............................................      4

2.       HABENDUM; TERM. ................................................      6

3.       POSSESSION. ....................................................      7

4.       BASE RENT         ..............................................      7

5.       ADDITIONAL RENT. ...............................................      7

         A.       Definitions............................................      8

                  (i)      "Base Year"...................................      8
                  (ii)     "Base Year Operating Expenses"................      8
                  (iii)    "Calendar Year"...............................      8
                  (iv)     "Tenant's Proportionate Share"................      8
                  (v)      "Taxes".......................................      8
                  (vi)     "Operating Expenses"..........................      9

         B.        Expense Adjustment....................................     10
         C.        Adjustment For Services Not Rendered by Landlord......     11

6.       USE OF PREMISES. ...............................................     11

7.       CONDITION OF PREMISES...........................................     12

8.       SERVICES.         ..............................................     12

         A.       List of Services.......................................     12
         B.       Billing for Electricity................................     13
         C.       Interruption of Services...............................     14
         D.       Charges for Services...................................     14
         E.       Energy Conservation....................................     15

9.       REPAIRS:  HAZARDOUS MATERIALS...................................     15
</TABLE>


                                       i
<PAGE>   3

                                                                                                                  
10.      ADDITIONS AND ALTERATIONS.......................................     16

11.      COVENANT AGAINST LIENS..........................................     20

12.      INSURANCE. .....................................................     20

         A.       Waiver of Subrogation..................................     20
         B.       Coverage...............................................     20
         C.       Avoid Action Increasing Rates..........................     20

13.      FIRE OR CASUALTY. ..............................................     22

14.      WAIVER OF CLAIMS - INDEMNIFICATION..............................     23

15.      NON WAIVER. ....................................................     24

16.      CONDEMNATION. ..................................................     24

17.      ASSIGNMENT AND SUBLETTING.......................................     24

18.      SURRENDER OF POSSESSION.........................................     26

19.      HOLDING OVER. ..................................................     27

20.      ESTOPPEL CERTIFICATE............................................     27

21.      SUBORDINATION. .................................................     28

22.      CERTAIN RIGHTS RESERVED BY LANDLORD.............................     28

23.      RULES AND REGULATIONS...........................................     30

24.      LANDLORD'S REMEDIES.............................................     30

25.      EXPENES OF ENFORCEMENT..........................................     32

26.      COVENANT OF QUIET ENJOYMENT.....................................     32

27.      SECURITY DEPOSIT. ..............................................     33

28.      REAL ESTATE BROKER..............................................     34

29.      UNDERLYING LEASES...............................................     34
</TABLE>


                                       ii
<PAGE>   4

                                                                                                                  
30.      NOTICE TO MORTGAGEE AND GROUND LESSOR...........................     34

31.      ASSIGNMENT OF RENTS.............................................     35

32.      PERSONAL PROPERTY TAXES.........................................     35

33.      MISCELLANEOUS. .................................................     35

         A.       Rights Cumulative......................................     36
         B.       Interest...............................................     36
         C.       Terms.   ..............................................     36
         D.       Binding Effect.........................................     36
         E.       Lease Contains All Terms...............................     36
         F.       Delivery for Examination...............................     36
         G.       No Air Rights..........................................     36
         H.       Modification of Lease..................................     36
         I.       Substitution of Other Premises.........................     36
         J.       Transfer of Landlord's Interest........................     37
         K.       Landlord's Title.......................................     37
         L.       Prohibition Against Recording..........................     37
         M.       Covenants and Conditions...............................     37
         N.       Covenants and Conditions...............................     37
         O.       Only Landlord/Tenant Relationship......................     37
         P.       Application of Payments................................     38
         Q.       Definition of Landlord.................................     38
         R.       Time of Essence........................................     38
         S.       Governing Law..........................................     38
         T.       Partial Invalidity.....................................     38
         U.       Size of Premises.......................................     38
         V.       Payment Under Protest..................................     38

34.      NOTICES. .......................................................     38

35.      LIMITATION ON LANDLORD'S LIABILITY..............................     40

36.      LANDLORD'S DESIGNATED AGENT.....................................     40

         EXHIBIT A.        PLAN OF PREMISES..............................     42
         EXHIBIT B.        INTENTIONALLY OMITTED.........................     43
         EXHIBIT C.        RULES AND REGULATIONS.........................     44
         EXHIBIT D.        CLEANING SPECIFICATIONS.......................     48
         EXHIBIT E.        MEASUREMENT STANDARDS.........................     54
</TABLE>


                                      iii
<PAGE>   5
                                  OFFICE LEASE
                                  COPLEY PLACE
                              BOSTON, MASSACHUSETTS


         THIS INSTRUMENT is an Agreement of Lease in which the Landlord and the
Tenant are the parties hereinafter named, and which relates to space in the
Office Section of Copley Place (hereinafter referred to as the "Office Section")
located at 100 Huntington Avenue, Boston, Suffolk County, Massachusetts (the
project known as Copley Place, including without limitation the hotel portions
thereof, plazas, pedestrian bridges, service areas and all other common areas,
together with all present and future easements, additions, improvements, air
rights and other rights appurtenant thereto, is hereinafter referred to as the
"Property"), subject to the covenants, terms, provisions and conditions of this
Lease. The "Office Section" means that portion of the building (the "Building")
located at the aforesaid address consisting of seven (7) levels of office areas
containing approximately 845,000 square feet of rentable floor area. The
Building also contains retail shopping, restaurant, parking and other
facilities, which are not included within the Office Section. The building does
not, however, include the hotel or residential portions of the Property or the
pedestrian bridges.

         In consideration thereof, Landlord and Tenant covenant and agree as
follows:

1.       BASIC DATA. .

         The Following sets forth basic data and, where appropriate, constitutes
definitions of the terms hereinafter listed.
Date:                               February 6, 1995
Landlord:                           COPLEY PLACE ASSOCIATES NOMINEE
                                    CORPORATION, a Delaware nominee corporation


                                       1
<PAGE>   6

                                             
Present Mailing Address of Landlord:             c/o JMB Properties Urban Company
                                                 Suite 600
                                                 Four Copley Place
                                                 Boston, Massachusetts 02116

Tenant:                                          NEUROTEC INTERNATIONAL CORP., a Delaware corporation

Present mailing Address of Tenant:               Suite 102
                                                 Four Copley Place
                                                 Boston, Massachusetts 02116

                                                 and

                                                 Ehlesstrasse 15
                                                 D-88046
                                                 Friedrichshafen, Germany

Commencement Date:                               February 6, 1995, or the date on which Tenant takes occupancy of
                                                 the premises or any portion thereof, whichever is the first to
                                                 occur.

Termination Date:                                January 31, 1998, unless sooner terminated as provided in this
                                                 Lease.

Base Rent:                                       At the rate of Ninety-Nine Thousand Seven Hundred Eighty-Seven and
                                                 50/100 Dollars ($99,787.50) per annum, equal monthly installments
                                                 of Eight Thousand Three Hundred Fifteen and 63/100 Dollars
                                                 ($8,315.63) (computed on the basis of $22.50 per rentable square
                                                 foot per annum at 4,435 rentable square feet of space).  (See
                                                 Paragraph 4)

Base Year:                                       The Calendar year 1994.

Base Year Operating Expenses:                    The amount of Operating Expenses incurred with respect to the Base
                                                 Year.

Tenant's proportionate Share:                    0.55% (computed on the basis of 95% occupancy).

Use:                                             General office purposes, storage and uses accessory and incidental
                                                 thereto.
</TABLE>


                                       2
<PAGE>   7

                                             
Premises:                                        That portion of the Office Section designated on the plan attached
                                                 hereto as Exhibit A and commonly described as approximately 4,435
                                                 rentable square feet (RSF), consisting of the Skylobby of Four
                                                 Copley Place. Excepted and excluded from the Premises are the roof
                                                 or ceiling, the floor and all perimeter walls of the Premises,
                                                 except the inner surfaces thereof, but the entry doors to the
                                                 Premises are not excluded from the Premises and are a part thereof
                                                 for all purposes: and Tenant agrees that Landlord shall have the
                                                 right to place in the Premises (but in such manner as to reduce to
                                                 a minimum interference with Tenant's use of the Premises) utility
                                                 lines, pipes and the like, to serve premises other than the
                                                 Premises, and to replace and maintain and repair such utility
                                                 lines, pipes and the like, in, over and upon the Premises.

Common Areas:                                    Those portions of the Property not leased to any tenant. but for
                                                 the benefit of the Property and its tenants, such as landscaped
                                                 areas, malls, pedestrian walkways and bridges, restrooms, service
                                                 areas and the like.

Security Deposit:                                Twenty-Four Thousand Nine Hundred Forty-Six and 89/100 ($24,946.89)

Broker:                                          Whittier Partners
</TABLE>

2.       HABENDUM; TERM.

         To have and to hold the Premises for the term commencing on the
Commencement Date and ending on the Termination Date, and the right to use the
Common Areas during such term in common with others entitled thereto. The Term
of this Lease (hereinafter referred to as the "Term") shall commence on the
Commencement Date specified in Paragraph 1 hereof and end on the Termination
Date specified in Paragraph 1 hereof unless sooner terminated as provided
herein.

         In addition, Tenant shall have the right during the Term to use two (2)
non-reserved parking spaces in the garage located within and serving the
Property, subject to payment by Tenant to Landlord for such use at the
prevailing rate therefor charged by Landlord from time to time (the "Parking
Rate"). Further, upon Tenant's written request therefor, Landlord agrees to
provide to Tenant two (2) additional non-reserved parking spaces (the "At-Will
Parking Spaces") in the garage located within and serving the Property, subject
to payment by Tenant to Landlord for such use at the Parking Rate: provided,
however, that both Landlord and Tenant shall have the right to terminate
Tenant's right to use up to two (2) of such spaces by giving at least thirty


                                       3
<PAGE>   8
(30) days' written notice to the other party of the election so to do. Upon
notice of termination by either party, the right of Tenant to use the At-Will
Parking Spaces terminates. All payments by Tenant to Landlord for the use of
such parking spaces shall be additional rent hereunder, and in the event of
non-payment thereof by the Tenant, Landlord shall have all of the rights and
remedies with respect thereto as would accrue to the Landlord for non-payment of
Base Rent hereunder.

3.       POSSESSION.

         A. In the event the Premises shall not be substantially completed and
ready for occupancy on the Commencement Date or in the event Landlord is unable
to deliver possession on such date by reason of the holding over or retention of
possession by any tenant or occupant, or for any other reason, this Lease shall
nevertheless continue in force and effect. The obligation of Tenant to begin
paying Rent shall commence on the Commencement Date. The Premises shall be
substantially complete and ready for occupancy if only insubstantial details of
construction, decoration or mechanical adjustments remain to be done. Landlord's
architect or interior space planner for the Building shall determine whether the
Premises are substantially completed and ready for occupancy and such
determination shall be final and conclusive on Tenant.

         B. If Tenant shall enter the Premises or any part thereof prior to the
Commencement Date (which Tenant may not do without Landlord's prior written
consent), such entry shall be at Tenant's sole risk and without interference to
any work then being performed in the Building by Landlord or other tenants or
occupants, and all of the covenants and conditions of this Lease shall be
binding upon the parties hereto with respect to such whole or part of the
Premises.

         C. The occurrence of any of the events described in this Paragraph 3
shall not be deemed to accelerate or defer the Termination Date.

4.       BASE RENT

         Tenant shall pay to Landlord or Landlord's agent without notice or
demand at the present mailing address of Landlord, or at such other place as
Landlord may from time to time designate in writing, in coin or currency which,
at the time of payment, is legal tender for private or public debts in the
United States of America, the Base Rent specified in Paragraph 1 hereof in the
equal monthly installments specified in Paragraph 1 hereof in advance on or
before the first day of each and every month during the Term, without any
abatement, counterclaim, set-off or deduction whatsoever. Notwithstanding the
foregoing sentence, Tenant shall pay the first full monthly installment at the
time of execution of this Lease. If the Term commences other than on the first
day of a month or ends other than on the last day of the month, the Base Rent
for such month shall be prorated. The prorated Base Rent for the portion of the
month in which the Term commences shall be paid on the first day of the first
full month during the Term.



                                       4
<PAGE>   9
5.       ADDITIONAL RENT.

         In addition to paying the Base Rent specified in Paragraph 4 hereof,
Tenant shall pay as "Additional Rent" the amounts determined pursuant to
Sub-Paragraphs B and C inclusive, of this Paragraph 5. The Base Rent and the
Additional Rent are sometimes herein collectively referred to as the "Rent'. All
amounts due under this Paragraph as Additional Rent shall be payable for the
same periods and in the same manner, time and place as the Base Rent, without
any abatement, counterclaim, set-off or deduction whatsoever. Without limitation
on other obligations of Tenant which shall survive the expiration of the Term,
the obligations of Tenant to pay the Additional Rent provided for in this
Paragraph 5 shall survive the expiration of the Term. For any partial Calendar
Year, Tenant shall be obligated to pay only a pro rata share of the Additional
Rent, based on the number of days of the Term falling within such Calendar Year.

         A.       Definitions. As used in this Paragraph 5, the terms:

                  (i)      "Base Year" shall mean the calendar year specified in
                           Paragraph 1 hereof.

                  (ii)     "Base Year Operating Expenses" shall mean the sum
                           specified in Paragraph 1 hereof.

                  (iii)    "Calendar Year" shall mean each calendar year in
                           which any part of the Term falls, through and
                           including the year in which the Term expires.

                  (iv)     "Tenant's Proportionate Share" shall mean the
                           percentage specified in Paragraph 1 hereof, being the
                           percentage calculated by dividing the rentable area
                           contained in the Premises by 802.750 (being 95% of
                           the rentable square foot area of the Office Section),
                           rentable area to be determined by Landlord on a
                           uniform basis for the tenants of the Office Section.

                  (v)      "Taxes" shall mean all real estate taxes and
                           assessments, special or otherwise, levied or assessed
                           upon or with respect to the Building or any part
                           thereof and Common Areas which Landlord determines in
                           its sole judgment to be for the benefit of the
                           Building and ad valorem taxes for any personal
                           property of Landlord used in connection therewith.
                           Should the Commonwealth of Massachusetts, or any
                           political subdivision thereof, or any other
                           governmental authority having jurisdiction over the
                           Building, (a) impose a tax, assessment, charge or
                           fee, which Landlord shall be required to pay, by way
                           of substitution for or as a supplement to such real
                           estate taxes and ad valorem personal property taxes,
                           or (b) impose an income or franchise tax or a tax on
                           rents in substitution for or as a supplement to a tax
                           levied against the Building or any part thereof
                           and/or the personal property used in connection with
                           the Building or any part thereof, all such taxes,
                           assessments, fees or charges (hereinafter defined as
                           "in lieu of taxes") shall be deemed to constitute
                           Taxes hereunder. Taxes shall also


                                       5
<PAGE>   10
                           include, in the year paid, all fees and costs
                           incurred by Landlord in seeking to obtain a reduction
                           of, or a limit on the increase in, any Taxes,
                           regardless of whether any reduction or limitation is
                           obtained. Except as hereinabove provided with regard
                           to "in lieu of taxes", Taxes shall not include any
                           inheritance, estate, succession, transfer, gift,
                           franchise, net income or capital stock tax.

                  (vi)     "Operating Expenses" shall mean (a) Taxes and (b) all
                           expenses, costs and disbursements of every kind and
                           nature, paid or incurred by Landlord in operating,
                           owning, managing, leasing, repairing and maintaining
                           the Office Section, the Building, the Property and
                           their appurtenances as such Taxes, expenses, costs
                           and disbursements are allocated to the Office Section
                           by the Landlord in its sole judgment or as the same
                           are incurred directly in the operation of Office
                           Section, including but without limitation: premiums
                           for fire, casualty, liability and such other
                           insurance as Landlord may from time to time maintain;
                           security expenses; compensation and all fringe
                           benefits, workmen's compensation insurance premiums
                           and payroll taxes paid by Landlord to, for or with
                           respect to all persons engaged in operating,
                           maintaining, or cleaning; steam, water, sewer,
                           electric, gas, telephone, and other utility charges
                           not billed directly to tenants by Landlord or the
                           utility; expenses incurred in connection with the
                           central plant furnishing heating, ventilating and air
                           conditioning to the Office Section (and to the
                           Building and the Property where and to the extent the
                           expenses of the Building and the Property are
                           otherwise allocable to the Office Section), which
                           expenses may include a fee paid to the operator of
                           such central plant; costs of lighting, ventilating,
                           (including maintaining and repairing ventilating fans
                           and fan rooms) making routine repairs to and
                           maintenance of underground roadways (and the access
                           ramps servicing such roadways) and railroad platforms
                           and railroad rights of way (including track); costs
                           of repairing and maintaining fire protection systems
                           relating to the underground roadways, access ramps,
                           railroad platforms and railroad rights of way; costs
                           of building and cleaning supplies and equipment
                           (including rental); cost of maintenance, cleaning and
                           repairs; cost of snow plowing or removal, or both,
                           and care of interior and exterior landscaping;
                           payments to independent contractors under contracts
                           for cleaning, operating, management, maintenance and
                           repair (which payments may be to affiliates of
                           Landlord); all other expenses paid in connection with
                           cleaning, operating, management, maintenance and
                           repair, including reasonable reserves for the
                           replacement of capital improvements and equipment
                           contained in and/or used in connection with
                           operations; costs of any capital improvements
                           completed after the Base Year as reasonably amortized
                           by Landlord, with interest on the unamortized amount
                           at the rate of the greater of (i) 12% per annum or
                           (ii) 2% per annum above the base rate of interest
                           charged from time to time by


                                       6
<PAGE>   11
                           The First National Bank of Boston (but in no event at
                           a rate which is more than the highest lawful rate
                           allowable in The Commonwealth of Massachusetts), to
                           the extent the cost of the particular capital
                           improvement exceeds the amount of the unused reserve,
                           if any, for the replacement thereof previously
                           included in Operating Expenses and insurance
                           proceeds, if any, received by Landlord on account of
                           damage to the particular capital improvement;
                           increases in ground rent or similar payments, if any
                           (determined for the applicable Calendar Year on an
                           accrual basis). Operating Expenses shall not,
                           however, include the following:

                                    a.    Costs of alterations of any tenant's
                                          premises for a particular tenant and
                                          not for the benefit of the Office
                                          Section or any group of tenants
                                          therein;

                                    b.    Principal or interest payments on
                                          loans secured by mortgages or trust
                                          deeds on the Building and/or on the
                                          Property;

                                    c.    Leasing commission, attorneys' fees,
                                          costs and disbursements and other
                                          expenses incurred in connection with
                                          negotiations or disputes with tenants,
                                          other occupants, or prospective
                                          tenants or occupants;

                                    d.    Renovating or otherwise improving,
                                          decorating, painting or redecorating
                                          space for tenants or other occupants
                                          of the Property;

                                    e.    Costs incurred due to violation by
                                          Landlord or any tenant of the terms
                                          and conditions of any lease;

                                    f.    Overhead and profit increment paid to
                                          subsidiaries or affiliates of Landlord
                                          for services on or to the Property, to
                                          the extent only that the cost of such
                                          services exceed competitive costs of
                                          such services were they not so
                                          rendered by a subsidiary or affiliate;

                                    g.    All items and services for which
                                          Tenant is separately charged,
                                          reimburses Landlord or pays third
                                          persons;

                                    h.    Advertising and promotional
                                          expenditures;

                                    i.    Any fines or penalties incurred due to
                                          violations by Landlord of any
                                          governmental rule or authority; and


                                       7
<PAGE>   12
                                    j.    Any costs whatsoever related to any
                                          expansion of the Building.

         If less than 95% of the Office Section's rentable area shall have been
occupied by tenant(s) at any time during any Calendar Year, Operating Expenses
shall be determined for such Calendar Year to be an amount equal to the like
expense which would normally be expected to be incurred had such occupancy been
95% throughout such Calendar Year.

         B. Expense Adjustment. Tenant shall pay to Landlord or Landlord's agent
as Additional Rent, a sum ("Expense Adjustment Amount") equal to the amount by
which (i) the product of (a) Tenant's Proportionate Share and (b) Operating
Expenses (subject to adjustment pursuant to Paragraph 5C hereof) incurred with
respect to each Calendar Year exceeds (ii) Base Year Operating Expenses. The
Expense Adjustment Amount with respect to each Calendar Year shall be paid in
monthly installments, in an amount estimated from time to time by Landlord and
communicated by written notice to Tenant, which estimate may be revised to
reflect, without limitation, increases in Taxes during any period. Landlord
shall cause to be kept books and records showing Operating Expenses in
accordance with an appropriate system of accounts and accounting practices
consistently maintained. Following the close of each Calendar Year. Landlord
shall cause the amount of the Expense Adjustment Amount for such Calendar Year
to be computed based on Operating Expenses for such Calendar Year and Landlord
shall deliver to Tenant a statement of such amount and Tenant shall pay any
deficiency to Landlord as shown by such statement within thirty (30) days after
receipt of such statement. If the total of the estimated monthly installments
paid by Tenant during any Calendar Year exceed the actual Expense Adjustment
Amount due from Tenant for such Calendar Year, at Landlord's option such excess
shall be either credited against payments next due hereunder or refunded by
Landlord, provided Tenant is not then in default hereunder. Delay in computation
of the Expense Adjustment Amount or failure to deliver a statement of such
amount shall not be deemed a default hereunder or a waiver of Landlord's right
to collect the Expense Adjustment Amount. In computing the Expense Adjustment
Amount, the following provisions relating to Taxes shall be applicable: The
amount of any refund of Taxes received by Landlord shall be credited against
Taxes for the Calendar Year in which such refund is received; provided, however,
that in the event Landlord receives a refund of Taxes after the termination date
(as the same may be accelerated or extended as provided elsewhere in this Lease)
which refund relates to a Calendar Year during the Term hereof, the amount of
such refund fairly allocable to Tenant shall be refunded to Tenant by Landlord
(net of Tenant's allocated share of the cost of obtaining such refund and the
cost, if any, of making such refund); and further provided that if Tenant
expands into space formerly occupied by other tenants, which expansion space
becomes subject to this Lease, Tenant shall not be entitled to any refund or
credit in connection with a refund or abatement of Taxes for periods prior to
Tenant's occupancy of such expansion space. All references to Taxes "for" a
particular Calendar Year shall be deemed to refer to Taxes due and payable
during such Calendar Year without regard to when such Taxes are assessed or
levied.


                                       8
<PAGE>   13
         C. Adjustment For Services Not Rendered by Landlord. Tenant
acknowledges that if Landlord is not furnishing any particular work or service
the cost of which, if performed by Landlord would be included in Operating
Expenses, to any tenant who has undertaken to perform such work or service in
lieu of the performance thereof by Landlord, Operating Expenses shall be deemed
for the purpose of determining the Expense Adjustment Amount to be increased by
an amount equal to the additional Operating Expenses which would reasonably have
been incurred during such period by Landlord if it had at its own expense
furnished such work or service to such tenant.

6.       USE OF PREMISES.

         Tenant shall use and occupy the Premises in accordance with law; and
solely as an office for the type of business specified in Paragraph 1 hereof and
for no other purpose or purposes.

7.       CONDITION OF PREMISES.

         The Premises are demised to Tenant and Tenant accepts the same "as-is"
and, except as hereinafter expressly provided, all work necessary to prepare the
Premises for Tenant's occupancy shall be performed at Tenant's sole cost and
expense, in accordance with the applicable provisions of this Lease. Tenant's
taking possession of any portion of the Premises shall be conclusive evidence
that such portion of the Premises was in good order and satisfactory condition
when Tenant took possession excluding items of damage caused by Tenant or its
agents, independent contractors or suppliers. No promise of Landlord to alter,
remodel or improve the Premises, the Office Section or the Building and no
representation by Landlord or its agents respecting the condition of the
Premises, the Office Section or the Building have been made to Tenant or relied
upon by Tenant other than as may be contained in this Lease or in any written
amendment hereto signed by Landlord and Tenant; provided, however, that Landlord
agrees to perform the following work on the Premises:

         a.       Landlord shall shampoo and repair, as necessary, the carpet in
                  the Premises at Landlord's sole cost and expense:

         b.       Landlord shall construct one additional interior wall within
                  the Premises, the cost of which shall be payable by Tenant to
                  Landlord in twelve (12) equal monthly installments over the
                  first twelve (12) months of the term of this Lease, each of
                  which monthly payments shall be due and payable from Tenant to
                  Landlord together with each monthly payment of Base Rent, as
                  Additional Rent hereunder, and in the event of non-payment
                  thereof by the Tenant, the Landlord shall have all of the
                  rights and remedies with respect thereto as would accrue to
                  the Landlord for non-payment of Base Rent hereunder. Landlord
                  and Tenant agree to execute an instrument memorializing the
                  amount of the costs of this construction and the monthly
                  payments for the repayment thereof promptly after Landlord
                  receives Tenant's written notice as aforesaid.


                                       9
<PAGE>   14
8.       SERVICES.

         A.       List of Services.

         Landlord shall provide the following services, the costs of which are
included within Operating Expenses and the quality and quantity of which are not
less than those customarily provided by landlords of first-class office
buildings in the greater Boston, Massachusetts metropolitan area, on all days
during the Term, except Sundays and holidays, unless otherwise stated, and
subject to all governmental rules, regulations and guidelines applicable
thereto:

                  (i)      Heating and air conditioning in the Premises during
                           the normal heating and air conditioning seasons, from
                           Monday through Friday, during the period from 8 a.m.
                           to 6 p.m. and on Saturday during the period from 8
                           a.m. to 1 p.m. Tenant will pay for all heating and
                           air conditioning requested and furnished prior to or
                           following such hours at rates to be established from
                           time to time by Landlord. Requests for any additional
                           services shall be in writing and delivered to
                           Landlord not later than 2 p.m. of the previous day.

                  (ii)     Adequate electrical wiring and facilities for
                           standard building lighting fixtures provided by
                           Landlord and for Tenant's incidental uses (it being
                           understood that Tenant is to bear the cost of
                           replacement of all lamps, tubes, ballasts and
                           starters for lighting fixtures in the Premises);
                           provided that (a) the connected electrical load for
                           lighting and incidental use equipment does not exceed
                           an average of three watts per square foot of the
                           Premises: (b) the electricity so furnished for
                           incidental uses will be at a nominal 120 volts and no
                           electrical circuit for the supply of such incidental
                           use will have a current capacity exceeding 20
                           amperes; and (c) such electricity will be used only
                           for equipment and accessories normal to office usage.
                           If Tenant's requirements for electricity for lighting
                           and incidental uses are in excess of those set forth
                           in the preceding sentence, Landlord reserves the
                           right to require Tenant to install the conduit,
                           wiring and other equipment necessary to supply
                           electricity for such excess incidental use
                           requirements at Tenant's expense.

                  (iii)    City water from the regular Building outlets for
                           drinking, lavatory and toilet purposes.

                  (iv)     Janitorial services as delineated in Exhibit D
                           attached hereto.

                  (v)      Window washing of the inside and outside of windows
                           in the Building's perimeter walls as may be situated
                           in the Premises as delineated in Exhibit D attached
                           hereto.


                                       10
<PAGE>   15
                  (vi)     Non-exclusive automatic passenger elevator service at
                           all times.

                  (vii)    Non-exclusive freight elevator service subject to
                           scheduling by Landlord.

         B.       Billing for Electricity.

                  (i)      Separate Metering. In the event that Landlord in its
                           sole discretion makes arrangements with the utility
                           company supplying electricity to the Premises for
                           separate metering and billing. Tenant shall pay (as
                           hereinafter described) for the use of all electrical
                           service to the Premises (other than the electrical
                           service necessary for Landlord to fulfill its
                           obligation to provide heating and air conditioning as
                           provided in Paragraph 8A(i) hereof). Tenant shall be
                           billed directly by such utility company and Tenant
                           agrees to pay each bill promptly in accordance with
                           its terms. In the event that for any reason Tenant
                           cannot be billed directly, Landlord shall forward
                           each bill received by it with respect to the Premises
                           to Tenant which Tenant shall pay promptly in
                           accordance with its terms.

                  (ii)     Lack of Separate Metering. If the Premises are not
                           separately metered for any reason. Tenant shall pay
                           Landlord as further Additional Rent, in monthly
                           installments at the time prescribed for monthly
                           installments, a pro rata share of the cost of
                           electricity for the Office Section as estimated by
                           Landlord from time to time in Landlord's sole
                           discretion.

         C.       Interruption of Services.

         Tenant agrees that Landlord shall not be liable in damages, by
abatement of Rent or otherwise, for failure to furnish or delay in furnishing
any service, or for any diminution in the quality or quantity thereof, when such
failure or delay or diminution is occasioned, in whole or in part, by repairs,
renewals, or improvements, by any strike, lockout or other labor trouble, by
inability to secure electricity, gas, water, or other fuel at the Building after
reasonable effort so to do, by any accident or casualty whatsoever, by act or
default of Tenant or other parties, or by any other cause beyond Landlord's
reasonable control; and such failures or delays or diminution shall never be
deemed to constitute an eviction or disturbance of Tenant's use and possession
of the Premises or relieve Tenant from paying Rent or performing any of its
obligations under this Lease; provided, however, that if, as a result of the
negligence or willful misconduct of Landlord or its agents, there is an
interruption or discontinuance in the furnishing of any of said services which
directly results in Tenant's inability to operate its business at the Premises
for a period in excess of three (3) consecutive days after Tenant notifies
Landlord of such inability, Tenant's Rent obligations under this Lease shall
abate from the end of such period until the earlier to occur of (i) the date on
which said services are restored or (ii) the date on which Tenant resumes the
operation of its business in the Premises; and provided further that if, as a
result of the negligence or willful misconduct of Landlord or its agents, there
is an interruption or discontinuance in the furnishing of any of said services
which directly results in Tenant's inability to operate its


                                       11
<PAGE>   16
business at the Premises for a period in excess of thirty (30) consecutive days
after Tenant notifies Landlord of such inability. Tenant shall have the right to
terminate this Lease by giving written notice of such termination to Landlord at
any time after the expiration of such 30-day period but before the restoration
of said services.

         D.       Charges for Services.

         Charges for any service for which Tenant is required to pay, from time
to time hereunder, including but not limited to hoisting services or after hours
lighting, heating or air conditioning shall be due and payable at the same time
as the installment of Rent with which they are billed, or if billed separately,
shall be due and payable as further Additional Rent within ten (10) days after
such billing. If Tenant shall fail to make payment for any such services,
Landlord may, without notice to Tenant, in addition to any and all other
remedies available under this Lease or otherwise, discontinue any or all of such
services and such discontinuance shall not be deemed to constitute an eviction
or disturbance of Tenant's use and possession of the Premises or relieve Tenant
from paying Rent or performing any of its other obligations under this Lease.

         E.       Energy Conservation.

         Notwithstanding anything to the contrary in this Paragraph 8 or
elsewhere in this Lease. Landlord shall have the right to institute such
policies, programs and measures as may be necessary or desirable, in Landlord's
discretion, for the conservation and/or preservation of energy or energy related
services if consistent with similar programs instituted generally in first-class
office buildings in Boston, or as may be required to comply with any applicable
codes, rules and regulations, whether mandatory or voluntary.

9.       REPAIRS:  HAZARDOUS MATERIALS.

         Tenant will, at Tenant's own expense, keep the Premises, including all
improvements, fixtures and furnishings therein, in good order, repair and
condition at all times during the Term, and Tenant shall promptly and adequately
repair all damage to the Premises and replace or repair all damaged or broken
glass, fixtures and appurtenances, under the supervision and subject to the
approval of Landlord, and within any reasonable period of time specified by
Landlord. If Tenant does not do so, Landlord may, but shall not be obligated to,
make such repairs and replacements, and Tenant shall pay Landlord the cost
thereof, including a percentage of the cost thereof (to be uniformly established
for the Office Section) sufficient to reimburse Landlord for all overhead,
general conditions, fees and other costs or expenses arising from Landlord's
involvement with such repairs and replacements forthwith upon being billed for
same. Landlord may, but shall not be required to enter the Premises at all
reasonable times (and at any time in emergency situations) to make such repairs,
alterations, improvements and additions to the Premises, to the Office Section
or the Building or to any equipment located in the Office Section or the
Building as Landlord shall desire or deem necessary or as Landlord may be
required to do by governmental authority or court order or decree.


                                       12
<PAGE>   17
         Tenant shall not (either with or without negligence) cause or permit
the escape, disposal or release of any biologically or chemically active or
hazardous substances, or materials (collectively the "Hazardous Materials").
Tenant shall not allow the storage or use of Hazardous Materials in any manner
not sanctioned by law or by the highest standards prevailing in the industry for
the storage and use of such Hazardous Materials, nor allow to be brought into
the Building any Hazardous Materials except to use in the ordinary course of
Tenant's business, and then only after written notice is given to Landlord of
the identity of Hazardous Materials. Without limitation, Hazardous Materials
shall include those described in the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, as amended, 42 U.S.C. Section 9601 et
seq., the Resource Conservation and Recovery Act, as amended, 42 U.S.C. Section
6901 et seq., any applicable state or local laws and the regulations adopted
under these acts. If any lender or governmental agency shall ever require
testing to ascertain whether or not there has been any release of Hazardous
Materials, then the reasonable costs thereof shall be reimbursed by Tenant to
Landlord upon demand as additional charges if such requirement applies to the
Premises. In addition, Tenant shall execute affidavits, representations and the
like from time to time at Landlord's request concerning Tenant's best knowledge
and belief regarding the presence of Hazardous Materials on the Premises. In all
events, Tenant shall indemnify Landlord in the manner elsewhere provided in this
Lease from any release of Hazardous Materials on the Premises occurring while
Tenant is in possession or elsewhere if caused by Tenant or persons acting under
Tenant.

         Landlord represents and warrants that, to the best of Landlord's
knowledge as of the date of this Lease (i) no leak, spill, release, discharge,
emission or disposal of Hazardous Materials has occurred on the Premises or
(apart from de minimis amounts of any such materials used for cleaning or
maintenance purposes or in connection with the operation of loading docks) the
Common Areas, (ii) the Premises do not contain any Hazardous Materials and (iii)
the public areas of the Building (excluding all portions thereof leased or
leasable to tenants) comply with all applicable building codes and other
governmental requirements and with the Americans with Disabilities Act of 1990.
In the event that any such leak, spill, release, discharge, emission or disposal
of Hazardous Materials shall occur on the Premises or (apart from de minimis
amounts of such materials used for cleaning and maintenance purposes or in
connection with the operation of loading docks) the Common Areas as result of
any act or omission of Landlord, or in the event that the public areas of the
Building (excluding all portions thereof leased or leasable to tenants) do not
comply with all applicable building codes and other governmental requirements
and with the Americans With Disabilities Act of 1990, Landlord shall take any
and all actions necessary to bring the Premises, the Common Areas and/or the
public areas of the Building (excluding all portions thereof leased or leasable
to tenants) into compliance with applicable law, building codes, other
governmental requirements and the Americans with Disabilities Act of 1990, as
the case may be.

         The within covenants shall survive the expiration or earlier
termination of the Term.


                                       13
<PAGE>   18
10.      ADDITIONS AND ALTERATIONS.

         A. Tenant shall not, without the prior written consent of Landlord,
make any alterations, improvements or additions to the Premises. Landlord's
refusal to give said consent shall be conclusive. If Landlord consents to said
alterations, improvements or additions, it may impose such conditions with
respect thereto as Landlord deems appropriate, including, without limitation,
requiring Tenant to furnish Landlord with security for the payment of all costs
to be incurred in connection with such work, insurance against liabilities which
may arise out of such work, and plans and specifications plus permits necessary
for such work, requiring Tenant to perform such work at times designated by
Landlord. The work necessary to make any alterations, improvements or additions
to the Premises, whether prior to or subsequent to the Commencement Date, shall
be done at Tenant's expense by employees of or contractors hired by Landlord
except to the extent Landlord gives its prior written consent to Tenant's hiring
its own contractors. It is understood that Landlord's consent to the hiring by
Tenant of Tenant's own contractors may be withheld if Landlord's permitting such
hiring might reasonably be expected to adversely affect other construction in
the Building or might reasonably be expected to result in an interruption of
services provided to tenants of the Building. Tenant shall promptly pay to
Landlord or Tenant's contractors, as the case may be, when due, the cost of all
such work and of all decorating required by reason thereof, Tenant shall also
pay to Landlord a percentage of the cost of such work (such percentage to be
established on a uniform basis for the Office Section) sufficient to reimburse
Landlord for all overhead, general conditions, fees and other costs and expenses
arising from Landlord's involvement with such work. In connection with seeking
Landlord's approval, Tenant shall provide to Landlord plans and specifications
regarding proposed alterations, additions or improvements, as Landlord shall
reasonably require, and Tenant shall, in addition to all other expenses which
Tenant is obligated to pay to Landlord hereunder, pay to Landlord the expense
incurred by Landlord in connection with the review of such information. Upon
completion of such work Tenant shall deliver to Landlord, if payment is made
directly to contractors, evidence of payment, contractors' affidavits and full
and final waivers of all liens for labor, services or materials, all in form
satisfactory to Landlord. Tenant shall defend and hold Landlord, Landlord's
lessor, any mortgagee, the MTA (hereinafter defined), the Property and the
Building harmless from all costs, damages, liens and expenses related to such
work. All work done by Tenant or its contractors pursuant to Paragraphs 9 or 10
shall be done in a first-class workmanlike manner using only good grades of
materials and shall comply with all insurance requirements and all applicable
laws and ordinances and rules and regulations of governmental departments or
agencies.

         B. All alterations, improvements and additions to the Premises, whether
temporary or permanent in character, made or paid for by Landlord or Tenant,
shall without compensation to Tenant become Landlord's property at the
termination of this Lease by lapse of time or otherwise and shall, unless
Landlord requests their removal (in which case Tenant shall remove the same as
provided in Paragraph 18), be relinquished to Landlord in good condition,
ordinary wear excepted.


                                       14
<PAGE>   19
         Tenant may install, maintain, replace, remove or use any communications
or computer wires, cables and related devices (collectively the "Lines") at the
Property in or serving the Premises, provided: (a) Tenant shall obtain
Landlord's prior written consent, use an experienced and qualified contractor
approved in writing by Landlord, and comply with all of the other provisions of
Paragraph 10A, (b) any such installation, maintenance, replacement, removal or
use shall not interfere with the use of any then existing Lines at the Building,
(c) an acceptable number of spare Lines and space for additional Lines shall be
maintained for existing and future occupants of the Building, as determined in
Landlord's reasonable opinion, (d) if Tenant at any time uses any equipment that
may create an electromagnetic field exceeding the normal insulation ratings or
ordinary twisted pair riser cable or cause radiation higher than normal
background radiation, the Lines therefor (including riser cables) shall be
appropriately insulated to prevent such excessive electromagnetic fields or
radiation, (e) as a condition to permitting the installation of new Lines,
Landlord may require that Tenant remove existing Lines located in or serving the
Premises, (f) Tenant's rights shall be subject to the rights of any regulated
telephone company, and (g) Tenant shall pay all costs in connection therewith.
Landlord reserves the right to require that Tenant remove any Lines located in
or serving the Premises which are installed in violation of these provisions, or
which are at any time in violation of any laws, ordinances, rules or regulations
or represent a dangerous or potentially dangerous condition (whether such Lines
were installed by Tenant or any other party), within three (3) days after
written notice.

         Landlord may (but shall not have the obligation to): (i) install new
Lines at the Building, (ii) create additional space for Lines at the Property,
and (iii) reasonably direct, monitor and/or supervise the installation,
maintenance, replacement and removal of, the allocation and periodic
re-allocation of available space (if any) for, and the allocation of excess
capacity (if any) on, any Lines now or hereafter installed at the Building by
Landlord, Tenant or any other party (but Landlord shall have no right to monitor
or control the information transmitted through such Lines). Such rights shall
not be in limitation of other rights that may be available to Landlord by law or
otherwise. If Landlord exercises any such rights, Landlord may charge Tenant for
the costs attributable to Tenant, or may include those costs and all other costs
in Operating Expenses under Paragraph 5A(vi) (including without limitation,
costs for acquiring and installing Lines and risers to accommodate new Lines and
spare Lines, any associated computerized system and software for maintaining
records of Line connections, and the fees of any consulting engineers and other
experts); provided, any capital expenditures included in Operating Expenses
hereunder shall be amortized (together with reasonable finance charges) as
provided in Paragraph 5A(vi).

         Notwithstanding anything to the contrary in this Lease, Landlord
reserves the right to require that Tenant remove any or all Lines installed by
or for Tenant within or serving the Premises upon termination of this Lease,
provided Landlord notifies Tenant prior to or within thirty (30) days following
such termination. Any Lines not required to be removed pursuant to this Article
shall, at Landlord's option, become the property of Landlord (without payment by
Landlord). If Tenant fails to remove such Lines as required by Landlord, or
violates any other provision of this Paragraph, Landlord may, after twenty (20)
days written notice to Tenant, remove such Lines or remedy such other violation,
at Tenant's expense (without limiting Landlord's other remedies available under
this Lease or applicable Law). Tenant shall not,


                                       15
<PAGE>   20
without the prior written consent of Landlord in each instance, which shall not
be unreasonably withheld, grant to any third party a security interest or lien
in or on the Lines, and any such security interest or lien granted without
Landlord's written consent shall be null and void. Except to the extent arising
from the intentional or negligent acts of Landlord or Landlord's agents or
employees, Landlord shall have no liability for damages arising from, and
Landlord does not warrant that the Tenant's use of any Lines will be free from
the following (collectively called "Line Problems"): (x) any eavesdropping or
wire-tapping by unauthorized parties, (y) any failure of any Lines to satisfy
Tenant's requirements, or (z) any shortages, failures, variations,
interruptions, disconnections, loss or damage caused by the installation,
maintenance, replacement, use or removal of Lines by or for other tenants or
occupants at the Building, by any failure of the environmental conditions or the
power supply for the Building to conform to any requirements for the Lines or
any associated equipment, or any other problems associated with any Lines by any
other cause. Under no circumstances shall any Line Problems be deemed an actual
or constructive eviction of Tenant, render Landlord liable to Tenant for
abatement of Rent, or relieve Tenant from performance of Tenant's obligations
under this Lease; provided, however, that if, as a result of the negligence or
willful misconduct of Landlord or its agents, there is a Line Problem which
directly results in Tenant's inability to operate its business at the Premises
for a period in excess of three (3) consecutive days after Tenant notifies
Landlord of such inability, Tenant's Rent obligations under this Lease shall
abate from the end of such period until the earlier to occur of (i) the date on
which said Line Problem is rectified or (ii) the date on which Tenant resumes
the operation of its business in the Premises; and provided further, that if, as
a result of the negligence or willful misconduct of Landlord or its agents there
is a Line Problem which directly results in Tenant's inability to operate its
business at the Premises for a period in excess of thirty (30) consecutive days
after Tenant notifies Landlord of such inability, Tenant shall have the right to
terminate this Lease by giving written notice of such termination to Landlord at
any time after the expiration of such 30-days period but before the date on
which said Line Problem is rectified. Landlord in no event shall be liable for
damages by reason of loss of profits, business interruption or other
consequential damage arising from any Line Problems.

11.      COVENANT AGAINST LIENS.

         Tenant has no authority or power to cause or permit any lien or
encumbrance of any kind whatsoever, whether created by act of Tenant, operation
of law or otherwise, to attach to or be placed upon the Property, the Building
or the Premises, or to affect any estate or interest of Landlord, Landlord's
lessor, any mortgage or the MTA. Tenant covenants and agrees not to suffer or
permit any lien of mechanics, materialmen or others to be placed against the
Property, the building or the Premises, or to affect any estate or interest of
Landlord, Landlord's lessor, any mortgagee or the MTA, with respect to work or
services claimed to have been performed for or materials claimed to have been
furnished to Tenant or the Premises, and, in case of any such lien attaching or
notice of any lien, or claim therefor being asserted, Tenant covenants and
agrees to cause same to be immediately released and removed of records. In the
event that such lien is not immediately released and removed, Landlord, at its
sole option, may take all action necessary to release and remove such lien
(without any duty to investigate the validity thereof) and Tenant shall


                                       16
<PAGE>   21
promptly upon notice reimburse Landlord for all sums, costs and expenses
(including reasonable attorneys' fees) incurred by Landlord in connection
therewith.

12.      INSURANCE.

         A.       Waiver of Subrogation.

         Landlord and Tenant each hereby waive any and every claim for recovery
from the other for any and all loss of or damages to the Building or the
Premises or to the contents thereof, which loss or damage is covered by valid
and collectible physical damage insurance policies, to the extent that such loss
or damage is recoverable under said insurance policies. Inasmuch as this mutual
waiver will preclude the assignment of any such claim by subrogation (or
otherwise) to an insurance company (or any other person), Landlord and Tenant
each agree to give to each insurance company which has issued, or in the future
may issue, to it policies of physical damage insurance, written notice of the
terms of this mutual waiver, and to have said insurance policies properly
endorsed, if necessary, to prevent the invalidation of said insurance coverage
by reason of said waiver. Tenant's waiver of subrogation as hereinabove set
forth shall also run to the benefit of and extend to Landlord's lessor and the
MTA.

         B.       Coverage

         Tenant shall purchase and maintain insurance during the entire Term for
the benefit of Tenant, Landlord, Landlord's lessor, any mortgagee and the MTA
(as their respective interests may appear) with terms, coverages and in
companies satisfactory to Landlord, and with such increases in limits as
Landlord may from time to time request, but initially Tenant shall maintain the
following coverages in the following amounts:

                  (i)   Commercial General Liability Insurance covering
                        Tenant, Landlord, Landlord's lessor, the MTA and
                        Landlord's management agent for claims of bodily
                        injury, personal injury and property damage arising
                        out of Tenant's operations, assumed liabilities or
                        use of the Premises, for limits of liability not less
                        than:

                        Bodily Injury and Property  $3,000,000 each occurrence

                        Damage Liability            $3,000,000 annual aggregate

                        Personal Injury Liability   $3,000,000 annual aggregate
                                                    0% Insured's participation

                  (ii)  Comprehensive Automobile Insurance covering all
                        owned, non-owned and hired automobiles of Tenant
                        including the loading and unloading of any automobile
                        with limits of liability not less than:


                                       17
<PAGE>   22
                        Bodily Injury and Property  $3,000,000 each person

                        Damage Liability.           $3,000,000 each accident


                  (iii) Physical Damage Insurance covering all additions,
                        improvements and alterations to the Premises which
                        are beyond the building standard tenant improvements
                        provided by Landlord and all office furniture, trade
                        fixtures, office equipment, merchandise and all other
                        items of Tenant's property on the Premises. Such
                        insurance shall be written on an "all risks" of
                        physical loss or damage basis, for the full
                        replacement cost value of the covered items and in
                        amounts that meet any coinsurance clauses of the
                        policies of insurance.

         Tenant shall, prior to the commencement of the Term, furnish to
Landlord certificates evidencing such coverage, which certificates shall state
that such insurance coverage may not be changed or canceled without at least
thirty (30) days prior written notice to Landlord and Tenant and shall name
Landlord and Landlord's management agent as additional insureds.

         C.       Avoid Action Increasing Rates.

         Tenant shall comply with all applicable laws and ordinances, all orders
and decrees of court and all requirements of other governmental authorities
having jurisdiction over the Building and of the applicable rating bureau, and
shall not, directly or indirectly, make any use of the Premises which may
thereby be prohibited or be dangerous to person or property or which may
jeopardize any insurance coverage or may increase the cost of insurance or
require additional insurance coverage. If by reason of the failure of Tenant to
comply with the provisions of this Paragraph 12C, (i) any insurance coverage is
jeopardized Landlord may, in addition to all other remedies which may be
available to Landlord, terminate this Lease or (ii) insurance premiums are
increased, Landlord shall have the option either to terminate this Lease or to
require Tenant to make immediate payment of the increased insurance premium.

13.      FIRE OR CASUALTY.

         A. Paragraph 9 hereof notwithstanding, if the Premises or the access
thereto shall be damaged by fire or other casualty and if such damage does not
render all or a material portion of the Premises untenantable and if the
Premises, the Office Section or the Building are not substantially damaged (as
hereinafter defined), then Landlord shall, subject to building and zoning laws
then applicable, repair and restore the same with reasonable promptness, subject
to reasonable delays for insurance adjustments and delays caused by matters
beyond Landlord's reasonable control, but shall not be obligated to expend
therefor an amount in excess of the proceeds of insurance recovered with respect
thereto. If all or a material portion of the Premises are rendered untenantable
by fire or other casualty, or if the Premises, the Office Section or the
Building are substantially damaged by fire or other casualty (the term
"substantially damaged' meaning damage of such a character that the same cannot,
in ordinary course, reasonably be


                                       18
<PAGE>   23
expected to be repaired within ninety (90) days from the time that repair work
would commence), then, in either such case, Landlord shall have the right to
terminate this Lease by giving notice of Landlord's election so to do not later
than the earlier of (i) thirty (30) days after Landlord has ascertained all
information sufficient for Landlord to determine whether or not to terminate
this Lease, including, without limitation, the amount of insurance proceeds
which are available to Landlord for restoration, or (ii) ninety (90) days
following the occurrence of such damage. In the event Landlord gives such
termination notice, this Lease shall terminate (with appropriate proration(s) of
Rent being made for Tenant's possession of the tenantable portion of the
Premises after the date of such damage) as of the date specified in such notice
(but in no event sooner than thirty (30) days after the date of such notice)
with the same force and effect as if the date specified were the date originally
established as the expiration date hereof. Further, in the event this Lease is
not terminated by Landlord, Landlord shall not be obligated to restore any
portion of the Office Section or the Building outside of the Premises which is
not necessary for reasonable access to and egress from the Premises, but if
Landlord elects not to restore such damaged or destroyed portions of the Office
Section or the Building, Landlord shall so notify Tenant within ninety (90) days
after the date of such damage or destruction, in which case Tenant shall have an
option to terminate this Lease, exercisable by written notice delivered by
Tenant to Landlord within thirty (30) days following Tenant's receipt of written
notice from Landlord of Landlord's election not to restore such damaged or
destroyed portions. If Landlord fails to give such notice to Tenant within one
hundred eighty (180) days after the date of such damage, Tenant shall have the
right to terminate this Lease by giving written notice of such termination to
Landlord at any time after the expiration of such 180-day period. Except as
otherwise provided below, Rent shall abate on those portions of the Premises as
are, from time to time, untenantable as a result of such damage.

         B. Notwithstanding anything to the contrary herein set forth. Landlord
shall have no duty pursuant to this Paragraph 13 to repair or restore any
portion of the alterations, additions or improvements in the Premises or the
decorations thereto except to the extent that such alterations, additions,
improvements and decorations were provided by Landlord, at Landlord's cost, at
the beginning of the Term. If Tenant desires any other or additional repairs or
restoration and if Landlord consents thereto, the same shall be done at Tenant's
sole cost and expense subject to all of the provisions of Paragraph 9 hereof.
Tenant acknowledges that Landlord shall be entitled to the full proceeds of any
insurance coverage, whether carried by Landlord or Tenant, for damage to
alterations, additions, improvements or decorations provided by Landlord either
directly or through an allowance to Tenant.

14.      WAIVER OF CLAIMS - INDEMNIFICATION.

         To the extent not prohibited by law, Landlord, its partners, its
managing agent, Landlord's lessor, any mortgagee, the MTA and their respective
officers, agents, servants and employees shall not be liable for any damage
either to person or property or resulting from the loss of use thereof sustained
by Tenant or by other persons due to the Building or any part thereof or any
appurtenances thereof becoming out of repair, or due to the happening of any
accident or event in or about the Office Section, the Premises or the Building,
or due to any act or neglect of


                                       19
<PAGE>   24
any tenant or occupant of the Office Section, the Building or of any other
person or entity. This provision shall apply particularly, but not exclusively,
to damage caused by gas, electricity, snow, frost, steam, sewage, sewer gas or
odors, fire, water, noise, vibration, fumes or by the bursting or leaking of
pipes, faucets, sprinklers, plumbing fixtures and windows, and shall apply
without distinction as to the person whose act or neglect was responsible for
the damage and whether the damage was due to any of the causes specifically
enumerated above or to some other cause of an entirely different kind. Tenant
further agrees that all personal property upon the Premises, or upon loading
docks, receiving and holding areas, or freight elevators of the Building shall
be at the risk of Tenant only, and that Landlord shall not be liable for any
loss or damage thereto or theft thereof. Without limitation of any other
provisions hereof, Tenant agrees to defend, protect, indemnify and save harmless
Landlord, Landlord's lessor, any mortgagee and the MTA from and against all
liability to third parties which arose (or which were claimed to have arisen)
within or without the Premises or out of acts or omissions of Tenant and its
servants, agents, employees, contractors, suppliers, workers and invitees.

15.      NONWAIVER.

         No waiver of any provision of this Lease shall be implied by any
failure of Landlord or Tenant to enforce any remedy on account of the violation
of such provision, even if such violation be continued or repeated subsequently,
and no express waiver shall affect any provision other than the one specified in
such waiver and that one only for the time and in the manner specifically
stated. No receipt of moneys by Landlord from Tenant after the termination of
this Lease shall in any way alter the length of the Term or of Tenant's right of
possession hereunder or after the giving of any notice shall reinstate, continue
or extend the Term or affect any notice given Tenant prior to the receipt of
such moneys, it being agreed that after the service of notice or the
commencement of a suit or after final judgment for possession of the Premises,
Landlord may receive and collect any Rent due, and the payment of said Rent
shall not waive or affect said notice, suit or judgment.

16.      CONDEMNATION.

         If the Property, the Building or any portion thereof shall be taken or
condemned by any competent authority for any public or quasi-public use or
purpose (a "taking"), or if the configuration of any roadway, street, alley, or
railroad line adjacent to or beneath the Building is changed by any competent
authority and such taking or change in configuration makes it necessary or
desirable to remodel or reconstruct the Building or any part thereof, Landlord
shall have the right, exercisable at its sole discretion, to cancel this Lease
upon not less than ninety (90) days notice prior to the date of cancellation
designated in the notice. No money or other consideration shall be payable by
Landlord to Tenant for the right of cancellation and Tenant shall have no right
to share in the condemnation award or in any judgment for damages caused by such
taking or change in configuration.


                                       20
<PAGE>   25
17.      ASSIGNMENT AND SUBLETTING.

         A. Tenant shall not, without the prior written consent of Landlord (i)
assign, convey or mortgage this Lease or any interest hereunder; (ii) permit to
occur or exist any assignment of this Lease, or any lien upon Tenant's interest,
voluntarily or by operation of law; (iii) sublet the Premises or any part
thereof; or (iv) permit the use of the Premises by any parties other than Tenant
and its employees. Any such action on the part of Tenant shall be void and of no
effect. Landlord's consent to any assignment, subletting or transfer or
Landlord's election to accept any assignee, subtenant or transferee as the
tenant hereunder and to collect rent from such assignee, subtenant or transferee
shall not release Tenant or any subsequent tenant from any covenant or
obligation under this Lease. Landlord's consent to any assignment, subletting or
transfer shall not constitute a waiver of Landlord's right to withhold its
consent to any future assignment, subletting, or transfer. If Tenant is a
corporation and if at any time during the Term the person or persons who own a
majority of its voting shares at the time of the execution of this Lease cease
to own a majority of such shares, Tenant shall so notify Landlord, and Landlord
may terminate this Lease by notice to Tenant given not later than ninety (90)
days thereafter. This provision shall not apply whenever Tenant is a corporation
the outstanding voting stock of which is listed on a recognized security
exchange. For the purposes of this provision, stock ownership shall be
determined in accordance with Section 544 of the Internal Revenue Code of 1986,
as amended through December 31, 1989, and the regulations thereunder, and the
term "voting stock" shall refer to shares of stock regularly entitled to vote
for the election of directors of the corporation. Notwithstanding the foregoing,
if Tenant is not then in default under this Lease beyond any applicable notice
and cure period, Landlord will not unreasonably withhold, condition or delay its
consent to the assignment of this Lease or the subletting of the whole or any
portion of the Premises by Tenant provided (and it shall be a condition of the
validity of any such assignment or subletting) without limitation that (i) in
the case of an assignment, such assignee shall first agree directly with
Landlord to assume and be bound by all of the obligations of Tenant hereunder,
including without limitation the obligations to pay rent and other charges, the
covenant against further assignment and the obligation to use the Premises only
for the purpose set forth in Paragraph 1 hereof, or (ii) in the case of a
subletting, such sublessee shall agree to be bound by and subject to all of the
obligations of Tenant hereunder with respect to the whole or such portion of the
Premises as may be sublet. Further, Landlord shall have the right to review and
approve the document used to effectuate such assignment or subletting, and
Tenant shall in any event furnish Landlord with a fully executed original of
such document within thirty (30) days after its full execution.

         B. Notwithstanding anything to the contrary herein contained,
Landlord's consent need not be obtained by Tenant for any assignment of this
Lease or subletting of the whole or any portion of the Premises by Tenant to a
corporation that controls Tenant ("Parent"), to a corporation controlled by
Tenant ("Subsidiary") or to a corporation under common control with Tenant
("Affiliate"), or to an entity acquiring all or substantially all of the stock
or assets of Tenant by way of merger, consolidation or sale, provided (and it
shall be a condition of the validity of any such assignment or subletting) that
such Parent, Subsidiary, Affiliate or resulting or acquiring entity, as the case
may be, shall (i) in the case of an assignment, first agree directly


                                       21
<PAGE>   26
with Landlord to assume and be bound by all of the obligations of Tenant
hereunder, including, without limitation, the obligations to pay Rent and other
charges, the covenant against further assignment and the obligation to use the
Premises only for the purpose set forth in Paragraph 1 hereof, or (ii) in the
case of a subletting, agree to be bound by and subject to all of the obligations
of Tenant hereunder with respect to the whole or such portion of the Premises as
may be sublet. Further, Tenant shall furnish Landlord with a fully executed
original of the document used to effectuate such assignment or subletting, which
shall comply with the requirements of this Paragraph 17B, within thirty (30)
days after its full execution. If Tenant requests Landlord's consent to assign
this Lease or sublet all or any portion of the Premises, in addition to
withholding its consent, Landlord shall have the option, exercisable by written
notice to Tenant given within thirty (30) days after receipt of such request, to
terminate this Lease for the entire Premises, in the case of an assignment or
subletting of the whole, and for the portion of the Premises, in the case of a
subletting of a portion. In the event that Landlord exercises such right to
terminate, Landlord shall be entitled to recover possession of and Tenant shall
surrender the whole or such portion of the Premises on the later of (i) the
proposed date for possession by such assignee or subtenant, or (ii) ninety (90)
days after the date of Landlord's notice of termination to Tenant. In the event
of termination in respect of a portion of the Premises, the portion so
eliminated shall be delivered to Landlord in good order and condition and
thereafter, to the extent necessary in Landlord's judgment, Landlord, at its own
cost and expense, may have access to and may make modification to the Premises
so as to make such portion a self-contained rental unit with access to common
areas, elevators and the like, Base Rent and Tenant's Proportionate Share shall
be adjusted according to the extent of the Premises for which the Lease is
terminated. Without limitation of the rights of Landlord hereunder in respect
thereto, if there is any assignment of this Lease by Tenant or a subletting of
the whole of the Premises by Tenant at a rent which, in either case, exceeds the
rent payable hereunder by Tenant, or if there is a subletting of a portion of
the Premises by Tenant at a rent in excess of the subleased portion's pro rata
share of the rent payable hereunder by Tenant, then Tenant shall pay to
Landlord, as additional rent, forthwith upon Tenant's receipt of each
installment of any such excess rent, the full amount of any such excess rent.
The provisions of this paragraph shall apply to each and every assignment of the
Lease and each and every subletting of all or a portion of the Premises, whether
to a subsidiary or controlling corporation or any other person, firm or entity,
in each case on the terms and conditions set forth herein. Each request by
Tenant for permission to assign this Lease or to sublet the whole or any part of
the Premises shall be accompanied by a warranty by Tenant as to the amount of
rent to be paid to Tenant by the proposed assignee or sublessee. For the
purposes of this Paragraph 1 7B, the term "rent" shall mean all Base Rent,
Additional Rent or other payments and/or consideration payable by one party to
another related to the use and occupancy of all or a portion of the Premises.

18.      SURRENDER OF POSSESSION.

         Upon the expiration of the Term or upon the termination of Tenant's
right of possession to all or a portion of the Premises, whether by lapse of
time or at the option of Landlord as herein provided. Tenant shall forthwith
quietly and peaceably surrender the Premises or portion thereof to Landlord in
good order, repair and condition, ordinary wear, fire and other casualty damage


                                       22
<PAGE>   27
and any damage caused by Landlord excepted, and shall, if Landlord so requires,
restore the Premises or portion thereof to the condition existing at the
beginning of the Term. Any interest of Tenant in the alterations, improvements
and additions to the Premises made or paid for by Landlord or Tenant shall,
without compensation to Tenant, become, at Landlord's option, Landlord's
property at the termination of this Lease by lapse of time or otherwise and if
such option is exercised such alterations, improvements and additions shall be
relinquished to Landlord in good condition, ordinary wear excepted. Landlord
shall inform Tenant at the time Landlord approves any such alteration,
improvement or addition as to whether or not Landlord shall exercise such
option. If Landlord does not exercise such option with respect to any such
alteration, improvement or addition, Tenant's restoration obligation referred to
above shall be applicable. Within seven (7) days prior to the termination of the
Term or of Tenant's right of possession Tenant shall remove office furniture,
trade fixtures, office equipment and all other items of Tenant's property on the
Premises Tenant shall pay to Landlord upon demand the cost of repairing any
damage to the Premises and to the Building caused by any removal required
hereunder. If Tenant shall fail or refuse to remove any such property from the
Premises, Tenant shall be conclusively presumed to have abandoned the same, and
title thereto shall thereupon pass to Landlord without any cost either by
set-off, credit, allowance or otherwise, and Landlord may at its option accept
the title to such property or, at Tenant's expense, may (i) remove the same or
any part in any manner that Landlord shall choose, repairing any damage to the
Premises caused by such removal, and (ii) store, destroy or otherwise dispose of
the same without incurring liability to Tenant or any other person.

19.      HOLDING OVER.

         In addition to performing all of Tenant's other obligations hereunder,
Tenant shall pay to Landlord an amount as Rent equal to the greater of (i) the
monthly market rental rate for a term of not less than one (1) year for similar
premises in the Building without regard to concessions such as tenant
improvement allowance and free rent, if any, or (ii) the sum of one hundred
fifty percent (150%) of one-twelfth the Base Rent and one hundred fifty percent
(150%) of one-twelfth the Additional Rent paid by Tenant during the previous
Calendar Year herein provided, such amount to be paid monthly during each month
or portion thereof for which Tenant shall retain possession of the Premises or
any part thereof after the termination of the Term or of Tenant's right of
possession, whether by lapse of time or otherwise, and also shall pay all
damages sustained by Landlord, whether direct or consequential, on account
thereof. The provisions of this Paragraph 19 shall not be deemed to limit or
constitute a waiver of any other rights or remedies of Landlord provided herein
or at law.

20.      ESTOPPEL CERTIFICATE.

         Tenant agrees that, from time to time upon not less than ten (10)
business days prior request by Landlord, Landlord's lessor or any mortgagee,
Tenant or Tenant's duly authorized representative having knowledge of the
following facts will deliver to Landlord a statement in writing certifying (i)
that this Lease is unmodified and in full force and effect (or if there have
been modifications, a description of such modifications and that the Lease as
modified is in full


                                       23
<PAGE>   28
force and effect); (ii) the dates to which Rent and other charges have been
paid; (iii) that Landlord is not in default under any provision of this Lease,
or, if in default, the nature thereof in detail; (iv) that the Premises have
been delivered to Tenant by Landlord and accepted by Tenant; (v) that there are
no proceedings pending against Tenant which have been adversely decided and
which would affect Tenant's obligations under this Lease; (vi) that Tenant has
not made a claim against Landlord which has not been resolved or satisfied; and
(vii) such further matters as may be requested by Landlord, it being intended
that any such statement may be relied upon by any prospective assignee of
Landlord, any mortgagee or prospective mortgagee of the Building, any
prospective assignee of any such mortgagee, or any prospective and/or subsequent
purchaser or transferee of all or a part of Landlord's interest in the Property,
the Office Section or the Building or any other person having an interest
therein. Tenant shall execute and deliver whatever instruments may be required
for such purposes, and in the event Tenant fails so to do within ten (10) days
after demand in writing, Tenant shall be considered in default under this Lease.

21.      SUBORDINATION.

         This Lease and all rights of Tenant hereunder are subject and
subordinate to any mortgage or mortgages, blanket or otherwise, made by Landlord
and which do now or may hereafter affect the Property or the Building and to any
and all renewals, modifications, consolidations, replacements and extensions
thereof, and to any ground or other lease, or similar instrument now or
hereafter placed against the Building. It is the intention of the parties that
this provision be self-operative and that no further instrument shall be
required to effect such subordination of this Lease. Tenant shall, however, upon
demand at any time or times execute, acknowledge and deliver to Landlord without
expense to Landlord, any and all instruments that may be necessary or proper to
subordinate this Lease and all rights of Tenant hereunder to any such mortgage
or mortgages or to confirm or evidence such subordination. Tenant covenants and
agrees, in the event any proceedings are brought for the foreclosure of any such
mortgage, to attorn, without any deductions or set-offs whatsoever, to the
purchaser upon any such foreclosure sale if so requested to do by such
purchaser, and to recognize such purchaser as the Landlord under this Lease.
Tenant agrees to execute and deliver at any time and from time-to-time, upon the
request of Landlord or of any holder of such mortgage or of such purchaser, any
instrument which, in the sole judgment of such requesting party, may be
necessary or appropriate in any such foreclosure proceeding or otherwise to
evidence such attornment. Tenant hereby irrevocably appoints Landlord and the
holder of such mortgage, or either of them, the attorney-in-fact of Tenant to
execute and deliver any such instrument for and on behalf of Tenant. Tenant
further waives the provisions of any statute or rule of law, now or hereafter in
effect, which may give or purport to give Tenant any right or election to
terminate or otherwise adversely affect this Lease, or the obligations of Tenant
hereunder in the event any such foreclosure proceeding is brought, prosecuted or
completed. Tenant and Landlord further agree that if so requested by any
mortgagee of Landlord, this Lease shall be made superior to any such mortgage
and that they will execute such documents as may be required by such mortgagee
to effect the superiority of this Lease to such mortgage.


                                       24
<PAGE>   29
22.      CERTAIN RIGHTS RESERVED BY LANDLORD.

         Landlord shall have the following rights (but not obligations), each of
which Landlord may exercise without notice to Tenant and without liability to
Tenant for damage or injury to property, person or business on account of the
exercise thereof, and the exercise of any such rights shall not be deemed to
constitute an eviction or disturbance of Tenant's use or possession of the
Premises and shall not give rise to any claim for set-off or abatement of Rent
or any other claim:

                  (i)      To change the Building's name or street address.

                  (ii)     To install, affix and maintain any and all signs on
                           the exterior and on the interior of the Building.

                  (iii)    To decorate or to make repairs, alterations,
                           additions, or improvements, whether structural or
                           otherwise, in and about the Building, or any part
                           thereof, and for such purposes, upon reasonable prior
                           notice to Tenant, to enter upon the Premises, and
                           during the continuance of any of said work, to
                           temporarily close doors, entryways, public space and
                           corridors in the Building and to interrupt or
                           temporarily suspend services or use of facilities,
                           all without affecting any of Tenant's obligations
                           hereunder, so long as the Premises are reasonably
                           accessible and usable. Landlord agrees to use
                           reasonable efforts in the exercise of such rights to
                           minimize any interference with Tenant's occupancy of
                           the Premises and the conduct of the business thereon.

                  (iv)     To furnish door keys for the entry door(s) in the
                           Premises at the commencement of this Lease and to
                           retain at all times, and to use in appropriate
                           instances, keys to all doors within and into the
                           Premises. Tenant agrees to purchase only from
                           Landlord additional duplicate keys as required, to
                           change no locks, and not to affix locks on doors
                           without the prior written consent of Landlord.
                           Notwithstanding the provisions for Landlord's access
                           to Premises. Tenant relieves and releases Landlord of
                           all responsibility arising out of theft, robbery,
                           pilferage and personal assault. Upon the expiration
                           of the Term or of Tenant's right of possession,
                           Tenant shall return all keys to Landlord and shall
                           disclose to Landlord the combination of any safes,
                           cabinets or vaults left in the Premises.

                  (v)      To designate and approve all window coverings used in
                           the Building.

                  (vi)     To approve the weight, size and location of safes,
                           vaults and other heavy equipment and articles in and
                           about the Premises and the Building so as not to
                           exceed the legal live load per square foot designated
                           by the


                                       25
<PAGE>   30
                           structural engineers for the Building, and to require
                           all such items and furniture and similar items to be
                           moved into or out of the Building and Premises only
                           at such times and in such manner as Landlord shall
                           direct in writing. Tenant shall not install or
                           operate machinery or any mechanical devices of a
                           nature not directly related to Tenant's ordinary use
                           of the Premises without the prior written consent of
                           Landlord. Movements of Tenant's property into or out
                           of the Building or the Premises and within the
                           Building are entirely at the risk and responsibility
                           of Tenant, and Landlord reserves the right to require
                           permits before allowing any property to be moved into
                           or out of the Building or the Premises.

                  (vii)    To establish security policies and other controls for
                           the purpose of regulating all property and packages,
                           both personal and otherwise, to be moved into or out
                           of the Building and Premises and all persons using
                           the Building both during and after normal office
                           hours.

                  (viii)   To regulate delivery and service of supplies and the
                           usage of the loading docks, receiving areas and
                           freight elevators.

                  (ix)     To show the Premises to prospective tenants at
                           reasonable times (upon not less than 24 hours prior
                           oral or written notice) and, if vacated or abandoned,
                           to show the Premises at any time, and to prepare the
                           Premises for re-occupancy.

                  (x)      To erect, use and maintain pipes, ducts, wiring and
                           conduits, and appurtenances thereto, in and through
                           the Premises at reasonable locations.

                  (xi)     To enter the Premises at any reasonable time (upon
                           not less than 24 hours prior oral or written notice,
                           except in emergencies, when no such notice need be
                           given) to inspect the Premises.

                  (xii)    To grant to any person or to reserve unto itself the
                           exclusive right to conduct any business or render any
                           service in the Building. If Landlord elects to make
                           available to tenants in the Building any services or
                           supplies, or arranges a master contract therefor,
                           Tenant agrees to obtain its requirements, if any,
                           therefor from Landlord or under any such contract,
                           provided that the charges therefor are reasonable.

23.      RULES AND REGULATIONS.

         Tenant agrees to observe the rules and regulations for the Building
attached hereto as Exhibit C and made a part hereof. Landlord shall have the
right from time to time to prescribe additional rules and regulations which, in
its judgment, may be desirable for the use, entry, operation and management of
the Premises, the Office Section and the Building, each of which


                                       26
<PAGE>   31
rules and regulations and any amendments thereto shall become a part of this
Lease. Tenant shall comply with all such rules and regulations; provided,
however, that such rules and regulations shall not contradict or abrogate any
right or privilege herein expressly granted to Tenant.

24.      LANDLORD'S REMEDIES.

         If default shall be made in the payment of the Rent or any installment
thereof or in the payment of any other sum required to be paid by. Tenant under
this Lease or under the terms of any other agreement between Landlord and Tenant
and such default shall continue for five (5) days after written notice to
Tenant, or if default shall be made in the observance or performance of any of
the other covenants or conditions in this Lease which Tenant is required to
observe and perform and such default shall continue for twenty (20) days after
written notice to Tenant, or if a default involves a hazardous condition and is
not cured by Tenant immediately upon written notice to Tenant, or if the
interest of Tenant in this Lease shall be levied on under execution or other
legal Process, or if any voluntary petition in bankruptcy or for corporate
re-organization or any similar relief shall be filed by Tenant, or if any
involuntary petition in bankruptcy shall be filed against Tenant under any
federal or state bankruptcy or insolvency act and shall not have been dismissed
within ninety (90) days from the filing thereof, or if a receiver shall be
appointed for Tenant or any of the property of Tenant by any court and such
receiver shall not have been dismissed within thirty (30) days from the date of
his appointment, or if Tenant shall make and assignment for the benefit of
creditors, or if Tenant shall admit in writing Tenant's inability to meet
Tenant's debts as they mature, then Landlord may treat the occurrence of any one
or more of the foregoing events as a breach of this Lease, and thereupon at its
option may, without notice or any demand of any kind to Tenant or any other
person, have any one or more of the following described remedies in addition to
all other rights and remedies provided at law or in equity or elsewhere herein:

                  (i)      Landlord may terminate this Lease and the Term
                           created hereby and shall give Tenant written notice
                           of Landlord's election to do so and the effective
                           date thereof (the "Effective Date"), in which event
                           Landlord may forthwith repossess the Premises and
                           shall be entitled to recover, forthwith as liquidated
                           damages, in addition to any other sums or damages for
                           which Tenant may be liable to Landlord, a sum of
                           money equal to the present value (such present value
                           to be computed on the basis of a per annum discount
                           rate equal to 100 basis points below the effective
                           annual yield on U.S. Treasury obligations which could
                           be purchased on the business day next succeeding the
                           Effective Date and mature closest to the Termination
                           Date) of the Rent provided to be paid by Tenant for
                           the balance of the Term over the present value of the
                           fair market rental value of the Premises, after
                           deduction from the present value of such fair market
                           rental value of all anticipated expenses of
                           reletting. Should the present value of the fair
                           market rental value of the Premises, after deduction
                           of all anticipated expenses of reletting, for the
                           balance of the Term exceed the present value of the
                           Rent provided to be paid by Tenant for the balance of
                           the Term,


                                       27
<PAGE>   32
                           Landlord shall have no obligation to pay to Tenant
                           the excess or any part thereof or to credit such
                           excess or any part thereof against any other sums or
                           damages for which Tenant may be liable to Landlord.

                  (ii)     Landlord may terminate this Lease and the Term as
                           provided in (i) above and forthwith repossess the
                           Premises and shall be entitled to recover forthwith,
                           in addition to any other sums or damages for which
                           Tenant may be liable to Landlord, a sum of money
                           equal to amounts then due and the present value
                           (computed as aforesaid) of all or a portion of the
                           Rent and other sums to become due under this Lease
                           for all or a part of the period from the Effective
                           Date to the Termination Date. Furthermore, Landlord
                           shall have the right from time to time to recover
                           from Tenant, and Tenant shall remain liable for all
                           Rent which would have been due, other than Rent
                           accelerated and paid pursuant to the foregoing
                           sentence, and any other sums thereafter accruing as
                           they become due under this Lease during the period
                           from the Effective Date to the Termination Date. In
                           any such case, Landlord may (but shall be under no
                           obligation to, except as required by law) relet the
                           Premises or any part thereof for the account of
                           Tenant, for such rent, from time to time (which may
                           be for a term extending beyond the Term of this
                           Lease), and upon such terms as Landlord in Landlord's
                           sole discretion shall determine, and Landlord shall
                           not be required to accept any tenant offered by
                           Tenant or to observe any instructions given by Tenant
                           relative to such reletting. Also, in any such case,
                           Landlord may change the locks or other entry devices
                           of the Premises and make repairs, alterations and
                           additions in or to the Premises and redecorate same
                           to the extent deemed by Landlord necessary or
                           desirable, and Tenant shall upon written demand pay
                           the cost thereof together with Landlord's expenses of
                           reletting, including without limitation, brokerage
                           commissions payable to Landlord's agent or to others.
                           Landlord may collect the rents from any such
                           reletting and apply the same to the payment of
                           expenses of reentry, redecoration, repair and
                           alterations and the expenses of reletting and the
                           excess or residue remaining to the payment of Rent
                           and other sums in this Lease provided to be paid by
                           Tenant and not theretofore paid by acceleration or
                           otherwise, and any such excess or residue shall
                           operate only as an offsetting credit against the
                           amount of Rent and other sums then due and owing or,
                           at Landlord's option, shall be refunded to Tenant to
                           the extent paid as a result of acceleration or shall
                           be applied as an offsetting credit against Rent and
                           other sums thereafter becoming due and payable
                           hereunder; provided that in no event shall Tenant be
                           entitled to a credit on its indebtedness to Landlord
                           or refunds of amounts accelerated in excess of the
                           aggregate of the amount paid as a result of
                           acceleration and the amount would have been payable
                           by Tenant for the period for which the credit to
                           Tenant is being determined, had no default occurred.
                           No such reentry, repossession, repairs, alterations,
                           additions or reletting shall


                                       28
<PAGE>   33
                           operate to release Tenant in whole or in part from
                           any of Tenant's obligations hereunder, and Landlord
                           may, at any time and from time to time, sue and
                           recover judgment for any deficiencies from time to
                           time remaining after the application from time to
                           time of the proceeds of any such reletting.

                  (iii)    Landlord, without thereby waiving such default, may
                           cure the same for the account and at the expense of
                           Tenant, without notice in a case of emergency, as
                           determined by Landlord in its sole discretion, or in
                           case of correction of a dangerous or hazardous
                           condition, and in any other case if such default
                           continues after ten (10) days from the date of the
                           giving by Landlord to Tenant of written notice of
                           such default or of intention to cure. Bills for any
                           expense incurred by Landlord in connection with any
                           such performance by Landlord shall be for the account
                           of Tenant, and shall be due and payable in accordance
                           with the terms of said bills, and if not paid when
                           due, the amounts thereof shall become immediately due
                           and payable as Additional Rent under this Lease.

25.      EXPENSES OF ENFORCEMENT.

         In the event either party institutes legal proceedings against the
other for breach of or interpretation of any of the terms, conditions or
covenants of this Lease, the unsuccessful party by final unappealed or
non-appealable order, judgment or decree in such proceedings shall pay any and
all costs and expenses incurred by the prevailing party in enforcing or
establishing its rights hereunder, including without limitation court costs and
reasonable attorneys' fees.

26.      COVENANT OF QUIET ENJOYMENT.

         Landlord covenants that Tenant, on paying the Rent, charges for
services and other payments herein reserved and on keeping, observing and
performing all the other terms, covenants, conditions, provisions and agreements
herein contained on the part of Tenant to be kept, observed and performed shall,
during the Term, peaceably and quietly have, hold and enjoy the Premises subject
to the terms, covenants, conditions, provisions and agreements hereof, without
hindrance or ejection by any persons lawfully claiming by, through or under
Landlord, the foregoing covenant of quiet enjoyment being in lieu of any other
covenant, expressed or implied.

27.      SECURITY DEPOSIT.

         Tenant hereby deposits with Landlord the sum of the Security Deposit
specified in Paragraph 1 hereof (hereinafter referred to as "Collateral"), as
security for the prompt, full and faithful performance by Tenant of each and
every provision of this Lease and of all obligations of Tenant hereunder.


                                       29
<PAGE>   34
         A. If Tenant fails to perform any of its obligations hereunder,
Landlord may use, apply or retain the whole or any part of the Collateral for
the payment of (i) any Rent or other sums of money which Tenant may not have
paid when due, (ii) any sum expended by Landlord on Tenant's behalf in
accordance with the provisions of this Lease, and/or (iii) any sum which
Landlord may expend or be required to expend by reason of Tenant's default,
including, without limitation, any damage or deficiency in or from the reletting
of the Premises as provided in Paragraph 24. The use, application or retention
of the Collateral, or any portion thereof, by Landlord shall not prevent
Landlord from exercising any other right or remedy provided by this Lease or by
law (it being intended that Landlord shall not first be required to proceed
against the Collateral) and shall not operate as a limitation on any recovery to
which Landlord may otherwise be entitled. If any portion of the Collateral is
used, applied or retained by Landlord for the purposes set forth above, Tenant
agrees, within ten (10) days after written demand therefor is made by Landlord,
to deposit cash with Landlord in an amount sufficient to restore the Collateral
to its original amount.

         B. If Tenant shall fully and faithfully comply with all of the
provisions of this Lease, the Collateral, or any balance thereof, shall be
returned to Tenant without interest after the expiration of the Term or upon any
later date after which Tenant has vacated the Premises. In the absence of
evidence satisfactory to Landlord of any permitted assignment of the right to
receive the Collateral, or of the remaining balance thereof, Landlord may return
the same to the named Tenant herein regardless of one or more assignments of
Tenant's interest in this Lease or the Collateral. In such event, upon the
return of the Collateral, or the remaining balance thereof to the named Tenant,
Landlord shall be completely relieved of liability under this Paragraph 27 or
otherwise with respect to the Collateral.

         C. Tenant acknowledges that Landlord has the right to transfer or
mortgage its interest in the Premises and the Building and in this Lease and
Tenant agrees that in the event of any such transfer or mortgage, Landlord shall
have the right to transfer or assign the Collateral to the transferee or
mortgagee. Upon such transfer or assignment, Landlord shall thereby be released
by Tenant from all liability or obligation for the return of such Collateral and
Tenant shall look solely to such transferee or mortgagee for the return of the
Collateral, such transferee or mortgagee having no greater obligations in
respect of the Collateral than the Landlord had.

28.      REAL ESTATE BROKER.

         The Tenant represents that Tenant has dealt with (and only with) the
Broker specified in Paragraph 1 hereof as broker in connection with this Lease,
and that insofar as Tenant knows, no other broker negotiated this Lease or is
entitled to any commission in connection therewith, Tenant agrees to indemnify,
defend and hold harmless Landlord its employees and agents from and against any
claims made by any broker or finder other than the Broker named above for a
commission or fee in connection with this Lease or any sublease hereunder, but
nothing herein shall be construed as permitting any such sublease, provided that
Landlord has not in fact retained such broker or finder.


                                       30
<PAGE>   35
29.      UNDERLYING LEASES.

         Landlord is the lessee of the air rights premises within which the
Building is constructed pursuant to that certain Sublease (the "Sublease") dated
September 1, 1982 by and between a predecessor of Urban Investment and
Development Co. ("Urban"), as lessor. Urban is the lessee of said air rights
premises and other adjacent air rights premises which collectively are referred
to as Copley Place, pursuant to that certain Amended and Restated Lease (the
"Underlying Lease") dated January 31, 1980 by and between Urban and the
Massachusetts Turnpike Authority ("MTA"), as lessor.

         Landlord hereby gives notice to Tenant that it supports the Affirmative
Action and Resident Preference goals set forth in Paragraph 6 of Schedule D to
the Underlying Lease and in Attachment C to the City of Boston's Urban
Development Action Grant application for Copley Place, and encourages Tenant to
pursue such goals in Tenant's own employment practices. In connection with
hiring to fill permanent jobs at the Premises, Tenant shall not discriminate
against any employee or applicant for employment because of race, color,
religious creed, national origin, age or sex. Tenant shall comply to the extent
applicable, with Title VII of the U.S. Civil Rights Act and M.G.L. c.151B with
respect to employment at the Premises.

30.      NOTICE TO MORTGAGEE AND GROUND LESSOR.

         After receiving notice from any person, firm or other entity that it
holds a mortgage which includes the Premises, the Building or the Office Section
as part of the mortgaged premises, or that it is the ground lessor under a
ground lease (which term shall include the Underlying Lease and the Sublease)
with Landlord, as ground lessee, which includes the Premises, the Building or
the Office Section as part of the demised premises, no notice from Tenant to
Landlord shall be effective unless and until a copy of the same is given to such
holder or ground lessor, and the curing of any of Landlord's defaults by such
holder or ground lessor shall be treated as performance by Landlord. Such holder
or ground lessor shall be given such reasonable time as may be necessary to
effect such cure or to foreclose the mortgage or terminate the ground lease, as
the case may be. For the purposes of Paragraph 21, this Paragraph 30, Paragraph
31 and Paragraph 34, the term "mortgage" includes a mortgage on a leasehold
interest of Landlord (but not one on Tenant's leasehold interest).

31.      ASSIGNMENT OF RENTS.

         With reference to any assignment by Landlord of Landlord's interest in
this Lease, or the rents payable hereunder, conditional in nature or otherwise,
which assignment is made to the holder of a mortgage or ground lease (which term
shall include the Underlying Lease and the Sublease) on property which includes
the Premises, the Building or the Office Section, Tenant agrees:

                  (i)      that the execution thereof by Landlord, and the
                           acceptance thereof by the holder of such mortgage, or
                           the ground lessor, shall never be treated as an


                                       31
<PAGE>   36
                           assumption by such holder or ground lessor of any of
                           the obligations of Landlord hereunder, unless such
                           holder, or ground lessor, shall, by notice sent to
                           Tenant, specifically otherwise elect; and

                  (ii)     that, except as aforesaid, such holder or ground
                           lessor shall be treated as having assumed Landlord's
                           obligations hereunder only upon a foreclosure of such
                           holder's mortgage and the taking of possession of the
                           Premises, or in the case of a ground lessor, the
                           assumption of Landlord's position hereunder by such
                           ground lessor. In no event shall the acquisition of
                           title to the Building and the land on which the same
                           is located by a purchaser which, simultaneously
                           therewith, leases the entire Building or such land
                           back to the seller thereof be treated as an
                           assumption, by operation of law or otherwise, of
                           Landlord's obligations hereunder, but Tenant shall
                           look solely to such seller-lessee, and its successors
                           from time to time in title, for performance of
                           Landlord's obligations hereunder. In any such event,
                           this Lease shall be subject and subordinate to the
                           lease to such seller. For all purposes, such
                           seller-lessee, and its successors in title, shall be
                           the landlord hereunder unless and until Landlord's
                           position shall have been assumed by such
                           purchaser-lessor.

32.      PERSONAL PROPERTY TAXES.

         Tenant shall pay all taxes which may be lawfully charged, assessed, or
imposed upon all fixtures and equipment of every type and also upon all personal
property in the Premises, and Tenant shall pay all license fees which may
lawfully be imposed upon the business of Tenant conducted upon the Premises.

33.      MISCELLANEOUS.

         A. Rights Cumulative. All rights and remedies of Landlord under this
Lease shall be cumulative and none shall exclude any other rights and remedies
allowed by law.

         B. Interest. All payments becoming due under this Lease and remaining
unpaid when due shall bear interest until paid at the rate of the greater of (i)
eighteen percent (18%) per annum or (ii) two percent (2%) per annum above the
prime rate of interest charged from time to time by The First National Bank of
Boston (but in no event at a rate which is more than the highest rate which is
at the time lawful in the Commonwealth of Massachusetts).

         C. Terms. The necessary grammatical changes required to make the
provisions hereof apply either to corporations or partnerships or individuals,
men or women, as the case may require, shall in all cases be assumed as though
in each case fully expressed.

         D. Binding Effect. Each of the provisions of this Lease shall extend to
and shall, as the case may require, bind or inure to the benefit not only of
Landlord and of Tenant, but also of


                                       32
<PAGE>   37
their respective successors or assigns, provided this clause shall not permit
any assignment by Tenant contrary to the provisions of Paragraph 17 hereof. All
indemnities, covenants and agreements of Tenant contained herein shall inure to
the benefit of Landlord's agents and employees.

         E. Lease Contains All Terms. All of the representations and obligations
of Landlord are contained herein and in the Exhibits attached hereto, and no
modification, waiver or amendment of this Lease or of any of its conditions or
provisions shall be binding upon Landlord unless in writing signed by Landlord
or by a duly authorized agent of Landlord empowered by a written authority
signed by Landlord.

         F. Delivery for Examination. Submission of this Lease for examination
shall not bind Landlord in any manner, and no lease or obligations of Landlord
shall arise until this instrument is signed by both Landlord and Tenant and
delivery is made to each.

         G. No Air Rights. No rights to any view or to light or air over any
property, whether belonging to Landlord or any other person, are granted to
Tenant by this Lease.

         H. Modification of Lease. If any lender requires, as a condition to its
lending funds the repayment of which is to be secured by a mortgage or trust
deed on the Premises and Building or either, that certain modifications be made
to this Lease, which modifications will not require Tenant to pay any additional
amounts or otherwise change materially the rights or obligations of Tenant
hereunder, Tenant shall, upon Landlord's request, execute appropriate
instruments effecting such modifications.

         I. Substitution of Other Premises. At any time hereafter, Landlord may
(upon thirty (30) days prior notice) substitute for the Premises other premises
in the Building (herein referred to as the "New Premises") provided that the New
Premises shall be usable for Tenant's purpose and comparable to the Premises in
size; and if Tenant is already in occupancy of the Premises, then in addition
Landlord shall pay the expenses of Tenant's moving from the Premises to the New
Premises and for improving the New Premises so that they are substantially
similar to the Premises. Such move shall be made during evenings, weekends or
otherwise so as to incur the least inconvenience to Tenant. If the New Premises
are not the same size as the Premises, there shall be a proportionate adjustment
in Base Rent.

         J. Transfer of Landlord's Interest. Tenant acknowledges that Landlord
has the right to transfer its interest in the Premises, the Office Section and
the Building and in this Lease, and Tenant agrees that in the event of any such
transfer and the assumption of all of Landlord's prospective obligations by the
transferee, Landlord shall automatically be released from all prospective
liability under this Lease and Tenant agrees to look solely to such transferee
for the performance of such obligations hereunder. Tenant further acknowledges
that Landlord may assign its interest in this Lease to a mortgage lender as
additional security and agrees that such an assignment shall not release
Landlord from its obligations hereunder and that Tenant shall continue to look
to Landlord for the performance of its obligations hereunder.


                                       33
<PAGE>   38
         K. Landlord's Title. Landlord's title is and always shall be paramount
to the title of Tenant. Nothing herein contained shall empower Tenant to commit
or engage in any act which can, shall or may encumber the title of Landlord.

         L. Prohibition Against Recording. Neither this Lease, nor any
memorandum, affidavit or other writing with respect thereto, shall be recorded
by Tenant or by anyone acting through, under or on behalf of Tenant, and the
recording thereof in violation of this provision shall make this Lease null and
void at Landlord's election.

         M. Covenants and Conditions. The captions of paragraphs and
subparagraphs are for convenience only and shall not be deemed to limit,
construe, affect or alter the meaning of such paragraphs or subparagraphs.

         N. Covenants and Conditions. All of the covenants of Tenant hereunder
shall be deemed and construed to be "conditions", if Landlord so elects, as well
as "covenants" as though the words specifically expressing or importing
covenants and conditions were used in each separate instance.

         O. Only Landlord/Tenant Relationship. Nothing contained in this Lease
shall be deemed or construed by the parties hereto or by any third party to
create the relationship of principal and agent, partnership, joint venturer or
any association between Landlord and Tenant, it being expressly understood and
agreed that neither the method of computation of Rent nor any act of the parties
hereto shall be deemed to create any relationship between Landlord and Tenant
other than the relationship of landlord and tenant.

         P. Application of Payments. Landlord shall have the right to apply
payments received from Tenant pursuant to this Lease (regardless of Tenant's
designation of such payments) to satisfy any obligations of Tenant hereunder, in
such order and amounts as Landlord in its sole discretion may elect.

         Q. Definition of Landlord. All indemnities, covenants and agreements of
Tenant contained herein which inure to the benefit of Landlord shall be
construed to also inure to the benefit of Landlord's agents and employees.

         R. Time of Essence. Time is of the essence of this Lease and each of
its provisions.

         S. Governing Law. Interpretation of this Lease shall be governed by the
law of the Commonwealth of Massachusetts.

         T. Partial Invalidity. If any term, provision or condition contained in
this Lease shall, to any extent, be invalid or unenforceable, the remainder of
this Lease (or the application of such term, provision or condition to persons
or circumstances other than those in respect of which it is invalid or
unenforceable) shall not be affected thereby, and each and every other term,


                                       34
<PAGE>   39
provision and condition of this Lease shall be valid and enforceable to the
fullest extent possible permitted by law.

         U. Size of Premises. The size of Premises will be determined on the
basis of the standards set forth in Exhibit E attached hereto. With regard to
Base Rent, Operating Expenses, and with regard to all other payments which are
computed based upon the rentable area of the Premises, it is understood that the
amounts payable as set forth in this Lease are predicated upon assumed rentable
area set forth in this Lease. Not later than ninety (90) days after the
Commencement Date, an exact measurement of the rentable area of the Premises
shall be made in accordance with Exhibit E, and if said measurement shall
indicate rentable area different from that recited in this Lease, Landlord and
Tenant shall promptly execute a supplemental instrument adjusting the amounts
payable hereunder to conform to the exact measurements. Such adjustments shall
be made by multiplying the amount subject to adjustment by a fraction, the
numerator of which is the actual rentable area of the Premises and the
denominator of which is the rentable area of the Premises originally set forth
herein. Any payment due from either party to the other as a result of any
adjustments made hereunder shall be paid promptly upon rendition of a statement
by the party entitled to additional Rent, or Rent refund, as the case may be.

         V. Payments Under Protest. Any payments to be made by either party
under this Lease which are disputed may be made under protest without a waiver
of claim by providing clear notice of such protest and adequate information as
to the basis of such claim.

34.      NOTICES.

         All notices to be given under this Lease shall be in writing and either
hand delivered; delivered by reputable overnight courier if sent to Germany;
delivery acknowledged by recipient; or deposited in the United States mail,
certified or registered mail with return receipt requested, postage prepaid,
addressed as follows:

         A.       If to Landlord:

                           c/o JMB Properties Urban Company
                           Suite 600
                           Four Copley Place
                           Boston, Massachusetts 02116
                           Attn:    Building Manager

                  with copies to:

                           JMB Properties Urban Company
                           Suite 1300
                           900 North Michigan Avenue
                           Chicago, Illinois 60611-1575
                           Attn:    Law Department


                                       35
<PAGE>   40
         B.       If to Tenant:

                           NeuroTec International Corp.
                           Suite ___
                           Four Copley Place
                           Boston, Massachusetts 02116
                           Attn:    _______________________

                  with copies to:

                           NeuroTec Hochtechnologie GMBH
                           Ehlesstrasse 15
                           D-88046
                           Friedrichshafen
                           Germany

or to such other person or such other address designated by notice sent by
Landlord or Tenant and as provided in Paragraph 30 of this Lease.

         After receiving notice from any person, firm or other entity that it
holds a mortgage which includes the Building as part of the mortgaged premises,
no notice from Tenant to Landlord shall be effective unless and until a copy of
the same is given to such holder, and the curing of any of Landlord's defaults
by such holder shall be treated as performance by Landlord. Such holder shall be
given such reasonable time as may be necessary to effect such cure or to
foreclose the mortgage, as the case may be. For the purposes of Paragraph 21,
Paragraph 30, Paragraph 31 and this Paragraph 34, the term "mortgage" includes a
mortgage on a leasehold interest of Landlord (but not one on Tenant's leasehold
interest).

         Notice by mail shall be deemed to have been given as of the date of
mailing as aforesaid, but for purposes of computing the period during which a
party may cure notice shall be deemed to have been given two (2) business days
after mailing. Notice by hand delivery or reputable overnight courier shall be
deemed to have been given at the time of delivery.

35.      LIMITATION ON LANDLORD'S LIABILITY.

         It is expressly understood and agreed by Tenant that none of Landlord's
covenants, undertakings or agreements are made or intended as personal
covenants, undertakings or agreements by Landlord or its partners, and any
liability for damage or breach or nonperformance by Landlord shall be
collectible only out of Landlord's interest in the Building and no personal
liability is assumed by, nor at any time may be asserted against, Landlord or
its partners or any of its or their directors, officers, agents, employees,
legal representatives, successors or assigns, all such liability, if any, being
expressly waived and released by Tenant. The provisions of this


                                       36
<PAGE>   41
Paragraph 35 shall expressly be applicable to and inure to the benefit of
Landlord's successors and assigns. In no event shall Landlord or its constituent
partners be liable for any incidental or consequential damages in connection
with its obligations under, or any action taken by Landlord or its constituent
partners in connection with, this Lease.

36.      LANDLORD'S DESIGNATED AGENT.

         It is expressly understood and agreed by Tenant that the provisions of
this Lease may be enforced on behalf of Landlord by an agent designated by
Landlord for such purpose, and such enforcement shall be equally effective
whether in the name of Landlord or such agent.

                                    LANDLORD:

                                    COPLEY PLACE ASSOCIATES NOMINEE CORPORATION


                                    By: __________________________________
                                        Its Vice President
                                        Hereunto duly authorized


                                    TENANT:

                                    NEUROTEC INTERNATIONAL CORP.


                                    By: __________________________________
                                        Its _________________
                                        Hereunto duly authorized


                                       37
<PAGE>   42
                                  EXHIBIT "A".

                                PLAN OF PREMISES

                            4 COPLEY PLACE FLOOR PLAN


                                      A-1
<PAGE>   43
                                   EXHIBIT "B"

                              INTENTIONALLY OMITTED


                                      B-1
<PAGE>   44
                     EXHIBIT C TO COPLEY PLACE OFFICE LEASE
                                       FOR
                              BOSTON, MASSACHUSETTS
                              RULES AND REGULATIONS


         RULES AND REGULATIONS. Tenant agrees to observe the rights reserved to
Landlord in the Lease and agrees, for itself, its employees, agents, clients,
customers, invitees and guests, to comply with the following rules and
regulations and with such reasonable modifications thereof and additions thereto
as Landlord may make, from time to time, for the Building.

         (a)      Any sign, lettering, picture, notice, or advertisement
                  installed within Tenant's Premises (including but not limited
                  to Tenant identification signs on doors to the Premises) which
                  is visible outside of the Premises shall be installed at
                  Tenant's cost and in such manner, character and style as
                  Landlord may approve in writing. No sign, lettering, picture,
                  notice or advertisement shall be placed on any outside window
                  or in any position so as to be visible from outside the
                  Building or from any atrium or lobbies of the Building.

         (b)      Tenant shall not use the name of the Building or use pictures
                  or illustrations of the Building in advertising or other
                  publicity, without the prior written consent of Landlord.

         (c)      Tenant, its customers, invitees, licensees, and guests shall
                  not obstruct sidewalks, entrances, passages, courts,
                  corridors, vestibules, halls, elevators and stairways in and
                  about the Building. Tenant shall not place objects against
                  glass partitions or doors or windows or adjacent to any open
                  common space which would be unsightly from the Building
                  corridors or from the exterior of the Building, and will
                  promptly remove the same upon notice from Landlord.

         (d)      Tenant shall not make noises, cause disturbances, create
                  vibrations, odors or noxious fumes or use or operate any
                  electrical or electronic devices or other devices that emit
                  sound, waves or are dangerous to other tenants and occupants
                  of the Building or that would interfere with the operation of
                  any device or equipment or radio or television broadcasting or
                  reception from or within the Building or elsewhere, or with
                  the operation of roads or highways in the vicinity of the
                  Building and shall not place or install any projections,
                  antennae, aerials or similar devices inside or outside of the
                  Premises.

         (e)      Tenant shall not make any room-to-room canvass to solicit
                  business from other tenants in the Building, and shall not
                  exhibit, sell or offer to sell, use, rent or exchange any item
                  or services in or from the Premises unless ordinarily embraced
                  within Tenant's use of the Premises as specified in its lease.


                                      C-1
<PAGE>   45
         (f)      Tenant shall not waste electricity or water and agrees to
                  cooperate fully with Landlord to assure the most effective
                  operation of the Building's heating and air conditioning and
                  shall refrain from attempting to adjust any controls. Tenant
                  shall keep public corridor doors closed.

         (g)      Door keys for doors in the Premises will be furnished at the
                  commencement of the Lease by Landlord. Tenant shall not affix
                  additional locks on doors and shall purchase duplicate keys
                  only from Landlord. When the Lease is terminated, Tenant shall
                  return all keys to Landlord and will provide to Landlord the
                  means of opening any safes, cabinets or vaults left in the
                  Premises.

         (h)      Tenant assumes full responsibility for protecting its space
                  from theft, robbery and pilferage, which includes keeping
                  doors locked and other means of entry to the Premises closed
                  and secured.

         (i)      Peddlers, solicitors and beggars shall be reported to the
                  office of the Building or as Landlord otherwise requests.

         (j)      Tenant shall not install nor operate machinery or any
                  mechanical devices of a nature not directly related to
                  Tenant's ordinary use of the Premises without the written
                  permission of Landlord.

         (k)      No person or contractor not employed by Landlord shall be used
                  to perform window washing, cleaning, decorating, repair or
                  other work in the Premises.

         (l)      Tenant shall not, and Tenant shall not permit or suffer anyone
                  to:

                  (1)      Cook in the Premises;

                  (2)      Place vending or dispensing machines of any kind in
                           or about the Premises;

                  (3)      At any time sell, purchase or give away, or permit
                           the sale, purchase or gift of, food in any form;

         (m)      Tenant shall not:

                  (1)      Use the Premises for lodging, manufacturing or for
                           any immoral or illegal purposes.

                  (2)      Use the Premises to engage in the manufacture or sale
                           of, or permit the use of, any spirituous, fermented,
                           intoxicating or alcoholic beverages on the Premises.


                                      C-2
<PAGE>   46
                  (3)      Use the Premises to engage in the manufacture or sale
                           of, or permit the use of, any illegal drugs on the
                           Premises.

         (n)      In no event shall any person bring into the Building
                  inflammables such as gasoline, kerosene, naphtha and benzene,
                  or explosives or firearms or any other article of
                  intrinsically dangerous nature. If by reason of the failure of
                  Tenant to comply with the provisions of this paragraph, any
                  insurance premium payable by Landlord for all or any part of
                  the Building shall at any time be increased above normal
                  insurance premiums for insurance not covering the items
                  aforesaid, Landlord shall have the option to either terminate
                  the Lease or to require Tenant to make immediate payment for
                  the whole of the increased insurance premium.

         (o)      Tenant shall comply with all applicable federal, state and
                  municipal laws, ordinances and regulations and building rules,
                  and shall not directly or indirectly make any use of the
                  Premises which may be prohibited thereby or which shall be
                  dangerous to person or property or shall increase the cost of
                  insurance or require additional insurance coverage.

         (p)      If Tenant desires signal, communication, alarm or other
                  utility or service connection installed or changed, the same
                  shall be made at the expense of Tenant, with approval and
                  under direction of Landlord.

         (q)      Bicycles shall not be permitted in the Building in other than
                  Landlord designated locations.

         (r)      Tenant shall cooperate and participate in all security
                  programs affecting the Building.

         (s)      In the event Landlord allows one or more tenants in the
                  Building to do any act prohibited herein, Landlord shall not
                  be precluded from denying any other tenant the right to do any
                  such act.

         (t)      Tenant, or the employees, agents, servants, visitors or
                  licensees of Tenant shall not at any time place, leave or
                  discard any rubbish, paper, articles, or objects of any kind
                  whatsoever outside the doors of the Premises or in the
                  corridors or passageways of the Building. No animals or birds
                  shall be brought or kept in or about the Building.

         (u)      Landlord shall have the right to prohibit any advertising by
                  Tenant which, in Landlord's opinion, tends to impair the
                  reputation of the Building or its desirability for offices,
                  and, upon written notice from Landlord, Tenant will refrain
                  from or discontinue such advertising.


                                      C-3
<PAGE>   47
         (v)      Tenant shall not mark, paint, drill into, or in any way deface
                  any part of the Building or the Premises. No boring, driving
                  of nails or screws, cutting or stringing of wires shall be
                  permitted, except with the prior written consent of Landlord,
                  and as Landlord may direct. Tenant shall not install any
                  resilient tile or similar floor covering in the Premises
                  except with the prior approval of Landlord. The use of cement
                  or other similar adhesive material is expressly prohibited.

         (w)      Landlord shall have the right to limit or control the number
                  and format of listings on the main Building directory.

         (x)      Tenant may move in to the Premises only during non-business
                  hours and shall coordinate with Landlord and Landlord's
                  Management Company for proper move-in procedures.


                                      C-4
<PAGE>   48
                                    EXHIBIT D

                                  COPLEY PLACE
                             CLEANING SPECIFICATIONS


--------------------------------------------------------------------------------

I.        CLEANING - TENANT'S AREAS

         A.       NIGHTLY - MONDAY THRU FRIDAY HOLIDAYS EXCLUDED
--------------------------------------------------------------------------------

1.       DUST MOP, ALL STONE, CERAMIC, TILE, TERRAZZO, AND OTHER TYPES OF
         UNWAXED FLOORING, USING A TREATED MOP.

2.       DUST MOP ALL VINYL, ASBESTOS, ASPHALT, RUBBER AND SIMILAR TYPES OF
         FLOORING, USING A TREATED MOP. THIS INCLUDES REMOVAL OF GUM AND OTHER
         SIMILAR SUBSTANCES USING A SCRAPING DEVICE.

3.       VACUUM ALL CARPETED AREAS.

4.       DUST MOP ALL PRIVATE AND PUBLIC STAIRWAYS AND VACUUM IF CARPETED.

5.       HAND DUST AND WIPE CLEAN ALL HORIZONTAL SURFACES INCLUDING FURNITURE,
         FILE CABINETS, FIXTURES, AND WINDOW SILLS, USING A CHEMICALLY TREATED
         DUST CLOTH. PAPERS ON DESK SHALL REMAIN UNDISTURBED.

6.       DUST AND SANITIZE ALL TELEPHONES USING A DISINFECTANT SOLUTION.

7.       REMOVE FINGER MARKS FROM ALL PAINTED SURFACES NEAR LIGHT SWITCHES,
         ENTRANCE DOORS, ETC.

8.       REMOVE ALL GUM AND FOREIGN MATTER ON SIGHT.

9.       EMPTY AND CLEAN ALL WASTE RECEPTACLES AND REMOVE WASTE PAPER AND WASTE
         MATERIALS TO A DESIGNATED AREA. REPLACE LINERS IN EACH RECEPTACLE.

10.      DAMP DUST INTERIORS OF ALL WASTE DISPOSAL RECEPTACLES AND WASH AS
         NECESSARY.


                                      D-1
<PAGE>   49
11.      CLEAN AND SANITIZE USING A DISINFECTANT SOLUTION, ALL WATER FOUNTAINS
         AND WATER COOLERS. SINKS/FLOORS ADJACENT TO SINKS/FOUNTAINS TO BE
         WASHED NIGHTLY.

12.      SPOT MOP FLOORS FOR SPILLAGES, ETC.

13.      EMPTY AND DAMP CLEAN ALL ASH TRAYS AND SCREEN ALL SAND URNS.

14.      REMOVE FINGER MARKS AND DUST DOORS OF ELEVATOR HATCHWAYS.

15.      CLEAN ALL LOW LEDGES, SHELVES, BOOKCASES, CHAIR RAILS, TRIM, PICTURES,
         CHARTS, ETC., WITHIN REACH.

16.      CLEAN SINKS, TOILETS, AND RELATED PLUMBING FIXTURES.

17.      CLEAN MIRRORS, METALWORK, AND GLASS TABLE TOPS.

18.      UPON COMPLETION OF WORK, ALL SLOP SINKS ARE TO BE THOROUGHLY CLEANED
         AND ALL CLEANING EQUIPMENT AND SUPPLIES STORED NEATLY IN LOCATIONS
         DESIGNATED BY THE OFFICE OF THE BUILDING.

19.      ALL CLEANING OPERATIONS SHALL BE SCHEDULED SO THAT A MINIMUM OF LIGHTS
         ARE TO BE LEFT ON AT ANY TIME. UPON COMPLETION OF CLEANING ALL LIGHTS
         ARE TO BE TURNED OFF. ALL ENTRANCE DOORS ARE TO BE KEPT LOCKED DURING
         THE CLEANING OPERATION.

         B.       WEEKLY
--------------------------------------------------------------------------------

1.       HAND DUST ALL DOOR LOUVERS AND OTHER VENTILATING LOUVERS WITHIN REACH.

2.       DUST ALL BASEBOARDS.

3.       MOVE AND VACUUM UNDERNEATH ALL FURNITURE THAT CAN BE MOVED.

4.       IN HIGH TRAFFIC AREAS, DAMP MOP IF NECESSARY AND APPLY SPRAY BUFFING
         SOLUTION IN A FINE MIST AND BUFF WITH A SYNTHETIC PAD.

5.       BUFF TRAFFIC AREAS AND PIVOT POINTS.

6.       DAMP MOP ALL NON-CARPETED AND PUBLIC STAIRWAYS.


                                      D-2
<PAGE>   50
7.       WIPE CLEAN ALL BRIGHT WORK.

8.       CLEAN INTERIOR GLASS PARTITIONS AND DOORS.

9.       DUST ALL CHAIR RAILS.

         C.       QUARTERLY
--------------------------------------------------------------------------------

1.       VACUUM UPHOLSTERED FURNITURE.

2.       MACHINE SCRUB FLOORING.

3.       WASH AND APPLY ONE COAT OF APPROVED FLOOR FINISH TO COMPOSITION
         FLOORING.

4.       DUST ALL VERTICAL SURFACES SUCH AS WALLS, FURNITURE, PARTITIONS, AND
         SURFACES NOT REACHED IN NIGHTLY CLEANING.

5.       DUST EXTERIOR OF LIGHTING FIXTURES.

6.       WASH ALL BASEBOARDS.

7.       STRIP ALL RESILIENT FLOORING USING DILUTED STRIPPING SOLUTION. MACHINE
         SCRUB FLOOR USING PAD TO REMOVE ALL FLOOR FINISH. THOROUGHLY RINSE WITH
         CLEAR WATER AND APPLY TWO COATS OF FLOOR FINISH.

--------------------------------------------------------------------------------

II.      LAVATORIES

         A.       NIGHTLY - MONDAY THRU FRIDAY
--------------------------------------------------------------------------------

1.       POLICE LAVATORIES DURING THE DAY WITH MATRON OR PORTER TO PICK UP WASTE
         AND REPLENISH MATERIALS.

2.       CLEAN, SANITIZE (USING DISINFECTANT SOLUTION), AND POLISH ALL VITREOUS
         FIXTURES INCLUDING TOILET BOWLS, URINALS, AND WASH BASINS.

3.       SWEEP AND WASH FLOORING WITH APPROVED GERMICIDAL SOLUTION.


                                      D-3
<PAGE>   51
4.       WASH AND POLISH MIRRORS, POWDER SHELVES, DISPENSERS, HAND DRYERS,
         BRIGHT WORK, INCLUDING FLUSHOMETERS, PIPING, AND TOILET SEAT HINGES.

5.       CLEAN AND SANITIZE BOTH SIDES OF TOILET SEATS.

6.       EMPTY ALL CONTAINERS AND DISPOSAL UNITS AND INSERT NEW LINERS WHERE
         REQUIRED.

7.       WASH AND SANITIZE (USING A DISINFECTANT SOLUTION) EXTERIOR OF ALL
         CONTAINERS.

8.       EMPTY, CLEAN, AND SANITIZE ALL SANITARY NAPKIN DISPOSAL UNITS.

9.       DUST AND SPOT WASH, WHERE NECESSARY, PARTITIONS, TILE WALLS,
         DISPENSERS, CEILINGS, LIGHTS, SWITCHES AND RECEPTACLES.

10.      REFILL ALL DISPENSERS TO NORMAL LIMITS INCLUDING NAPKINS, SOAP, TISSUE,
         TOWELS, ETC.

11.      VACUUM ENTIRE CARPETED AREAS, IF ANY.

12.      REMOVE ALL RUBBISH.

         B.       WEEKLY
--------------------------------------------------------------------------------

1.       WET MOP ALL TILE FLOORS AND WASH BASEBOARDS.

2.       MACHINE SCRUB FLOORS, HAND BRUSH CORNERS, AND HAND BRUSH TOILET EDGES
         WITH APPROVED GERMICIDAL DETERGENT SOLUTION.

         C.       MONTHLY
--------------------------------------------------------------------------------

1.       WASH ALL PARTITIONS, TILE WALLS, AND ENAMEL SURFACES WITH APPROVED
         GERMICIDAL DETERGENT SOLUTION.

         D.       QUARTERLY
--------------------------------------------------------------------------------

1.       DUST ALL HVAC GRILLS AND LOUVERS.

         E.       OTHER


                                      D-4
<PAGE>   52
--------------------------------------------------------------------------------

1.       CLEANING OF COMPUTER ROOMS AND KITCHENS WILL BE THE RESPONSIBILITY OF
         INDIVIDUAL TENANTS.

--------------------------------------------------------------------------------

III.     PUBLIC CORRIDORS, STAIRWELLS, AND SERVICE AREAS:

         A.       NIGHTLY
--------------------------------------------------------------------------------

1.       VACUUM AND SPOT CLEAN CARPETING.

2.       SWEEP AND DAMP MOP PUBLIC AREA CONCRETE FLOORS.

3.       SWEEP AND DAMP MOP PUBLIC STAIRWELLS AND LANDINGS.

4.       CLEAN BASEBOARDS OF SCUFFS AND MARKS.

5.       EMPTY AND CLEAN ASHTRAYS AND SAND URNS.

6.       CLEAN ALL DIRECTORIES AND LOBBY SECURITY CONSOLE.

7.       CLEAN CORRIDOR GLASS AND METAL WORK.

8.       SPOT CLEAN WALLS, CEILINGS, LIGHTS, ETC.

9.       REMOVE TRASH TO COMPACTOR.

10.      CLEAN TELEPHONES, TELEPHONE BOOTH AREAS AND MAIL DROPS.

11.      KEEP SLOP SINKS, CLOSETS, SUPPLY ROOMS, AND OTHER JANITORIAL AREAS IN A
         CLEAN CONDITION.

12.      KEEP ELECTRICAL AND TELEPHONE CLOSETS CLEAN AND FREE OF STORAGE.

13.      CLEAN AND SANITIZE ALL PUBLIC DRINKING FOUNTAINS.

14.      SWEEP AND WASH ALL FLOORS IN PUBLIC LOBBY.

15.      CLEAN AND VACUUM CARPETING IN PASSENGER ELEVATOR CABS AND SPOT CLEAN AS
         NECESSARY.


                                      D-5
<PAGE>   53
16.      DUST AND WIPE CLEAN WALLS, DOORS AND METAL WORK ON ALL PASSENGER
         ELEVATORS.

17.      CLEAN FLOORS AND WALLS OF SERVICE ELEVATORS.

18.      CLEAN AND REMOVE ANY DEBRIS FROM CEILING FIXTURES IN PASSENGER
         ELEVATORS.

19.      WASH ALL LOBBY WALK OFF MATS.

         B.       WEEKLY
--------------------------------------------------------------------------------

1.       CLEAN ALL DOOR VENTS.

2.       DUST ALL VERTICAL SURFACES WITHIN REACH.

         C.       MONTHLY
--------------------------------------------------------------------------------

1.       DRY SHAMPOO ALL LOBBY CARPETING.

         D.       QUARTERLY
--------------------------------------------------------------------------------

1.       STEAM CLEAN ALL LOBBY CARPETING.

2.       VACUUM ALL CEILING GRILLS AND AIR LOUVERS.

--------------------------------------------------------------------------------

IV.      WINDOW CLEANING
--------------------------------------------------------------------------------

1.       WINDOWS WILL BE CLEANED AS NECESSARY, BUT NOT LESS THAN THE FOLLOWING
         FREQUENCIES:

         EXTERIOR OF EXTERIOR GLASS - NOT LESS THAN 5 TIMES/YEAR.
         INTERIOR OF EXTERIOR GLASS - NOT LESS THAN 2 TIMES/YEAR.
         EXTERIOR OF INTERIOR GLASS - NOT LESS THAN 1 TIMES/YEAR.
         INTERIOR OF INTERIOR GLASS - NOT LESS THAN 2 TIMES/YEAR.


                                      D-6
<PAGE>   54

                                    EXHIBIT E

                              MEASUREMENT STANDARDS


I. Measurement Standards - Single Tenancy Floors. Three steps, in sequence, are
to be followed to determine the Total Rentable Area: (i) compute gross area,
(ii) deduct certain areas, and (iii) add applicable share of areas to be
apportioned (see paragraph C below).

         A.       Gross Area: The gross area of a floor shall be the entire area
                  within the exterior walls. If the exterior wall consists in
                  whole or part of windows, fixed clear glass or other
                  transparent material, the measurement along the entire such
                  wall shall be taken to a line established by the vertical plan
                  of the inside of the glass or other transparent material. If
                  it consists solely of a nontransparent material, the
                  measurement shall be taken to the inside surface of the outer
                  building wall. If a floor has no exterior wall within the
                  property line, measurements shall be taken to the property
                  line. If a floor has no full-height enclosure wall,
                  measurement shall be taken to the edge of the floor slab.

         B.       Deductions from Gross Area: The following non-rentable
                  building areas with one-half of their enclosing walls are to
                  be deducted.

                  1.       Public elevator shafts and associated elevator
                           machine rooms.

                  2.       Required egress stairways.

                  3.       Areas within the gross area which are to be
                           apportioned pursuant to paragraph (C) below.

         C. Areas to be apportioned ("Attributable Area"):

                  1.       Common facilities including, without limitation, all
                           heating, ventilating, air conditioning, mechanical,
                           electrical, cooling tower, telephone and other
                           service floors, rooms or areas, containing equipment
                           or supplies (exclusive of any tenant special air
                           conditioning or mechanical area or facilities) and
                           all public lobbies (including monumental stair and/or
                           escalator), loading and other common service areas,
                           throughout and within the Building including one-half
                           of their enclosing walls, are to be apportioned.

                  2.       Whenever the height of any room or space used for a
                           heating, ventilating, air conditioning, mechanical,
                           or electrical facility above the ground floor shall
                           exceed the average story height in the Building by
                           more than 25 percent, then the floor area of such
                           room or space shall be determined by multiplying the
                           actual floor area by the percentage that the height
                           of the


                                      E-1
<PAGE>   55
                           room or space exceeds the average story height, and
                           adding the area so determined to the actual floor
                           area of such room or space; however, if any such
                           rooms or spaces penetrate the next higher floor, then
                           the entire area of such room or space on both floors
                           shall be apportioned under this paragraph (C).

II. Measurement Standards - Multiple Occupancy Floors. The sum of the Total
Rentable Area for two or more tenants on a floor shall be the Total Rentable
Area for that floor as computed in the manner for single tenancy floors. Three
steps are to be followed to determine the Total Rentable Area for each tenant on
a multiple occupancy floor: (i) compute the Net Rentable Area for such floor
pursuant to (a) below, (ii) compute the Net Rentable Area for each tenant
pursuant to (b) below, and (iii) multiply the Total Rentable Area of such floor
by a fraction whose numerator is the Net Rentable Area for such tenant and whose
denominator is the Net Rentable Area for such floor.

         A.       Net Rentable Area for Any Floor: The Net Rentable Area shall
                  be the gross area as described for single tenancy floors less
                  the entire core area (measured to the finished enclosing walls
                  thereof, but excluding any part of the core rented to a
                  tenant) and corridors (measured to the corridor side of the
                  finished enclosing walls of the corridor).

         B.       Net Rentable Area for Each Tenant: Exterior walls are to be
                  measured as described in the procedure for gross area.
                  Demising walls between tenants are to be equally divided.
                  Corridor walls to the finished corridor side are to be
                  included in the Net Rentable Area of each tenant.

III. Rentable Calculation. Rentable Area is determined by measuring usable area
(assuming all full floor occupants) and multiplying by 1.165.


                                      E-2