AMERICAN REAL ESTATE INVESTMENT CORP
8-K, 1999-08-20
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549




                                    FORM 8-K

                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


        Date of report (Date of earliest event reported): August 6, 1999


                   AMERICAN REAL ESTATE INVESTMENT CORPORATION
             (Exact Name of Registrant as Specified in its Charter)


- --------------------------------------------------------------------------------
      Maryland                   1-12514                       84-1246585
   (State or Other             (Commission                   (IRS Employer
   Jurisdiction of             File Number)                Identification No.)
   Incorporation)
- --------------------------------------------------------------------------------


                        620 W. Germantown Pike, Suite 200
                      Plymouth Meeting, Pennsylvania 19462
               (Address of Principal Executive Offices)(Zip Code)


- --------------------------------------------------------------------------------
               Registrant's telephone number, including area code:
                                 (610) 834-7950
- --------------------------------------------------------------------------------



<PAGE>



ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS


         On August 9, 1999, American Real Estate Investment Corporation (the
"Company") announced that it entered into an agreement to acquire certain
entities owning real property from Reckson Morris Industrial Trust, Reckson
Operating Partnership, L.P., Robert Morris, Joseph D. Morris and certain
related entities ("Morris") pursuant to a Contribution and Exchange Agreement
(the "Contribution Agreement"), dated as of August 6, 1999. Pursuant to the
Contribution Agreement, attached hereto as Exhibit 10.1, entities owning 28
"big box" industrial facilities aggregating 6.1 million square feet will be
contributed to the Company in exchange for approximately $300 million of
preferred stock and common stock of the Company, preferred units of the
Company's operating partnership, American Real Estate Investment, L.P., cash,
and assumed indebtedness. The Company expects to finance the cash portion of
the consideration through mortgage financing and other capital raising
transactions. The mortgage financing will be funded from proceeds of a $98
million loan from an institutional lender with a six year term and a fixed
rate of 7.45%.

         In acquiring these industrial facilities, the Company will acquire
approximately 111 acres of land, supporting approximately 1.6 million square
feet of development and definitive options for approximately 259 additional
acres of land, supporting approximately 2.9 million square feet of
development. As part of this transaction, the Company will enter into a
strategic alliance with Morris to develop the land it is purchasing and will
have a three year exclusivity agreement on all of Morris' New Jersey
industrial investment opportunities.

         The acquisition is expected to close in three phases, subject to the
satisfaction of certain customary closing conditions. The first phase, which
includes 22 buildings representing approximately 3.9 million square feet is
expected to close in September 1999. The second and third phases, each comprised
of three buildings containing 1.1 million square feet for a total of six
buildings aggregating 2.2 million square feet, are expected to close by
April 30, 2000.



<PAGE>


         The Reckson Morris Industrial Portfolio is located in New Jersey and
New York as follows:

PHASE I PROPERTIES

<TABLE>
<CAPTION>

                                                                          Leaseable      Occupancy       Year Built/
Property Address                      Location                           Square Feet    May 31, 1999       Renovated
- ----------------                      --------                           -----------    ------------     -----------
<S>                                   <C>                                <C>            <C>              <C>

118 Moonachie Avenue                  Carlstadt, NJ                         243,751        100.0%           1989
135 Fieldcrest Avenue                 Edison, NJ                             77,975        100.0%           1980
18 Madison Road                       Fairfield, NJ                          14,000        100.0%           1979
200 Carter Drive                      Edison, NJ                            105,910        100.0%           1985
200 Industrial Avenue                 Teterboro, NJ                         332,352        100.0%           1998
200-250 Kennedy Drive                 Sayerville, NJ                        164,267        100.0%           1988
21 Cranbury Road                      Cranbury, NJ                          845,835        100.0%           1988
22 Madison Road                       Fairfield, NJ                          39,875        100.0%           1980
24 Abeel Road                         Cranbury, NJ                           40,022        100.0%           1978
24 Madison Road                       Fairfield, NJ                          35,494        100.0%           1992
243 St. Nicholas Avenue               South Plainfield, NJ                   15,000        100.0%           1984
26 Madison Road                       Fairfield, NJ                          30,306        100.0%           1992
275-285 Pierce Street                 Franklin Township, NJ                 102,735        100.0%           1988
300-350 Kennedy Drive                 Sayerville, NJ                        161,705        100.0%           1988
301-321 Herrod Boulevard              South Brunswick, NJ                   610,949        100.0%           1989
309 Kennedy Drive                     Sayerville, NJ                        202,000        100.0%           1996
34 Englehard Drive                    Cranbury, NJ                          203,404        100.0%           1982
409 Kennedy Drive                     Sayerville, NJ                        225,831        100.0%           1996
535 Secaucus Road                     Secaucus, NJ                           68,439        100.0%           1974
55 Carter Drive                       Edison, NJ                            108,548         80.0%           1986
One Nixon Lane                        Edison, NJ                            192,829        100.0%           1987
Mt. Ebo                               Mt. Ebo, NY                            93,948        100.0%           1992
                                                                         ----------
                                                                 Total    3,915,175
                                                                         ----------
                                                                         ----------

</TABLE>

PHASE II PROPERTIES

<TABLE>
<CAPTION>

                                                                          Leaseable      Occupancy       Year Built/
Property Address                      Location                           Square Feet    May 31, 1999       Renovated
- ----------------                      --------                           -----------    ------------     -----------
<S>                                   <C>                                <C>            <C>              <C>
Nixon Park                            Edison, NJ                            851,907          (1)             (1)
Six Joanna Court                      East Brunswick, NJ                    214,000          0%             1978
30 Stultz Road                        East Brunswick, NJ                     60,317          0%             1974
                                                                         ----------
                                                                 Total    1,126,224
                                                                         ----------
                                                                         ----------

</TABLE>


(1)  Under construction, leases are signed for approximately 71% of the
     leaseable square feet.


<PAGE>


PHASE III PROPERTIES

<TABLE>
<CAPTION>

                                                                          Leaseable      Occupancy       Year Built/
Property Address                      Location                           Square Feet    May 31, 1999       Renovated
- ----------------                      --------                           -----------    ------------     -----------
<S>                                   <C>                                <C>            <C>              <C>
400 Cabot Drive                       Hamilton Township, NJ                 585,510         100%            1990
Four Applegate Drive                  Washington Township, NJ               265,000         100%            1998
5 Henderson Drive                     West Caldwell, NJ                     210,530         100%          1967/1990
                                                                         ----------
                                                                 Total    1,061,040
                                                                         ----------
                                                                         ----------

</TABLE>


The following table set forth below shows certain information regarding rental
rates and lease expirations for the Phase I properties of the Reckson Morris
Industrial Portfolio as of May 31, 1999 (assuming that no tenants exercise
renewal or cancellation options and that there are no tenant bankruptcies or
other tenant defaults):


<TABLE>
<CAPTION>

                                                                                                             Annualized Rent
                                                                     Percentage of                          Per Leased Square
    Year of Lease        Number of Expiring    Square Footage of      Total Leased     Annualized Rent of    Foot of Expiring
      Expiration               Leases           Expiring Leases       Square Feet      Expiring Leases (1)        Leases
- ----------------------- ---------------------- ------------------- ------------------- -------------------- -------------------
<S>                     <C>                    <C>                 <C>                 <C>                  <C>
         1999                     4                      299,961            7.69%        $      1,167,900      $       3.89
         2000                     8                      229,503            5.88%               1,105,044              4.81
         2001                     2                      367,983            9.43%               2,294,004              6.23
         2002                     1                      610,949           15.65%               2,291,064              3.75
         2003                     5                      117,423            3.01%                 552,390              4.70
         2004                     8                      590,871           15.14%               2,555,232              4.32
         2006                     4                      687,355           17.61%               2,959,980              4.31
         2007                     2                      183,040            4.69%               1,213,443              6.63
         2008                     1                      483,507           12.39%               1,987,212              4.11
         2013                     1                      332,352            8.51%               2,193,408              6.60
                        ---------------------- ------------------- ------------------- -------------------- -------------------
     Grand Total                 36                    3,902,944          100.00%        $     18,319,677      $       4.69
                                 --                    ---------          -------        ----------------      ------------
                                 --                    ---------          -------        ----------------      ------------

</TABLE>



(1)  Annualized Rent of Expiring Leases, as used above, represents the monthly
     contractual rental rate as of May 31, 1999, multiplied by twelve.

As of May 31, 1999, phase I of the Reckson Morris Industrial Portfolio was
approximately 99.7% leased to 36 tenants. Two tenants, Herrod Distribution
and Cosmetic Essence, individually occupy more than 10% of the total net
rentable area of phase I of the Reckson Morris Industrial portfolio.

The sellers of the Reckson Morris Industrial Portfolio(Reckson Operating
Partnership LP, Reckson Morris Industrial Trust, Reckson Morris Industrial
Interim GP, LLC, Robert Morris, Joseph D. Morris, Ronald Schram, Mark M. Bava,
The Drew Morris Trust, The Justin Morris Trust, The Keith Morris Trust, The
Joseph D. Morris Family Limited Partnership, and The Robert Morris Family
Limited Partnership) are parties unaffiliated with the Company and the Operating
Partnership. The Company based its determination of the purchase price of these
properties on the expected cash flow, physical condition, location, competitive
advantages, existing tenancies, and opportunities to retain and attract tenants.
The purchase price was determined through an arm's length negotiation between
the Company and the sellers.



<PAGE>

ITEM 7.   FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

     (a)  FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED

          It is impracticable to file with this Form 8-K the financial
          statements required by this Item 7 with regard to the acquisition
          described in Item 2 above. Those financial statements will be filed by
          amendment to this Form 8-K as soon as practicable and, in any event,
          within 60 days after the required filing date for this Form 8-K.

     (b)  PRO FORMA FINANCIAL INFORMATION

          It is impracticable to file with this Form 8-K the pro forma financial
          information required by this Item 7 with regard to the acquisition
          described in Item 2 above. This information will be filed by amendment
          to this Form 8-K as soon as practicable and, in any event, within 60
          days after the required filing date for this Form 8-K.

     (c)  EXHIBITS

          10.1 Contribution and Exchange Agreement, dated as of August 6, 1999
               by and beteween Reckson Operating Partnership LP, Reckson Morris
               Industrial Trust, Reckson Morris Industrial Interim GP, LLC,
               Robert Morris, Joseph D. Morris, Ronald Schram, Mark M. Bava, The
               Drew Morris Trust, The Justin Morris Trust, The Keith Morris
               Trust, The Joseph D. Morris Family Limited Partnership, and The
               Robert Morris Family Limited Partnership and American Real Estate
               Investment, L.P. and American Real Estate Investment Corporation




<PAGE>


                                   SIGNATURES


Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this Report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                       AMERICAN REAL ESTATE INVESTMENT
                                       CORPORATION
<TABLE>
<CAPTION>
<S>                                    <C>
Date:    August 19, 1999               By  /s/ Jeffrey E. Kelter
                                           -----------------------------------
                                           Jeffrey E. Kelter
                                           President and Chief Executive Officer


Date:    August 19, 1999               By  /s/ Timothy A. Peterson
                                           -----------------------------------
                                           Timothy A. Peterson
                                           Executive Vice President,
                                           Chief Financial Officer and Secretary


Date:    August 19, 1999               By  /s/ Timothy E. Mckenna
                                           -----------------------------------
                                           Timothy E. McKenna
                                           Treasurer
                                           (Principal Accounting Officer)
</TABLE>

<PAGE>

                                                                    EXHIBIT 10-1


                       CONTRIBUTION AND EXCHANGE AGREEMENT


         THIS CONTRIBUTION AND EXCHANGE AGREEMENT (the "AGREEMENT") is made as
of this 6th day of August, 1999 by and among each of the Persons set forth in
EXHIBIT A annexed hereto, each having the respective address set forth opposite
such Person's name in EXHIBIT A attached hereto (collectively, the
"CONTRIBUTORS"), AMERICAN REAL ESTATE INVESTMENT, L.P., a Delaware limited
partnership ("PARTNERSHIP"), having an address at 620 West Germantown Pike,
Suite 200, Plymouth Meeting, Pennsylvania 19462, Attention: President and
AMERICAN REAL ESTATE INVESTMENT CORPORATION, a Maryland corporation (the
"REIT"), having an address at 620 West Germantown Pike, Suite 200, Plymouth
Meeting, Pennsylvania 19462, Attention: President.

                                    RECITALS

     A. Reckson Morris Operating Partnership, L.P. ("RMOP" or the "COMPANY"), a
Delaware limited partnership, owns, develops and manages those certain parcels
of real property described on SCHEDULE 1.1 attached hereto, together with all of
the items of personal property described in Section 1 hereof which are located
thereon or related thereto (collectively, the "STAGE I PROPERTIES").

     B. On or prior to the Stage I Closing Date, Nixon Park, LLC, a Delaware
limited liability company ("NIXON"), will own, develop and manage the parcel of
real property described on SCHEDULE 1.2(A) attached hereto, together with all of
the items of personal property described in Section 1 hereof which are located
thereon or related thereto (the "NIXON PARK PROPERTY").

     C. On or prior to the Stage I Closing Date, Joanna, LLC, a Delaware limited
liability company ("JOANNA"), will own, develop and manage the parcel of real
property described on SCHEDULE 1.2(B) attached hereto, together with all of the
items of personal property described in Section 1 hereof which are located
thereon or related thereto (the "6 JOANNA PROPERTY").

     D. On or prior to the Stage I Closing Date, Stults, LLC, a Delaware limited
liability company ("STULTS" and together with Nixon and Joanna, the "RMOP
SUBS"), will own, develop and manage the parcel of real property described on
SCHEDULE 1.2(C) attached hereto, together with all of the items of personal
property described in Section 1 hereof which are located thereon or related
thereto (the "STULTS PROPERTY" and together with the Nixon Property and the
Joanna Property, the "STAGE II PROPERTIES").

     E. One or more Subsidiaries (such Subsidiaries, the "ROP SUBS") of Reckson
Operating Partnership, L.P., a Delaware limited partnership ("ROP"), own those
certain parcels of real property described on SCHEDULE 1.3 attached hereto
together with all of the items of


<PAGE>


personal property described in Section 1 hereof which are located thereon or
related thereto (the "STAGE III PROPERTIES").

     F. Reckson Morris Industrial Interim GP, LLC, a Delaware limited liability
company ("RMIIGP"), is currently the managing general partner of the Company.

     G. Reckson Morris Industrial Trust, a Maryland real estate investment trust
("RMIT" OR THE "GP"), is a general partner of the Company.

     H. Robert Morris, Joseph D. Morris, Ronald Schram, Mark M. Bava, The Drew
Morris Trust, The Justin Morris Trust, The Keith Morris Trust, Joseph D. Morris
Family Limited Partnership, and Robert Morris Family Limited Partnership (each,
a "MORRIS CONTRIBUTOR" and collectively, the "MORRIS CONTRIBUTORS") are limited
partners in the Company.

     I. RMIIGP, RMIT and the Morris Contributors shall hereinafter be
collectively referred to as the "RMOP CONTRIBUTORS."

     J. The RMOP Contributors collectively own all of the partnership interests
in and to RMOP. Each RMOP Contributor owns the respective percentage ownership
interest in RMOP set forth on EXHIBIT A.

     K. RMIT and the Morris Contributors collectively own all of the membership
interests in the RMOP Subs. Each of RMIT and each Morris Contributor owns the
respective percentage ownership interest in each of the RMOP Subs set forth on
EXHIBIT A.

     L. ROP owns or will own, as of the Stage III Closing Date (as hereinafter
defined), all of the membership interests in each of the ROP Subs.

     M. RMOP, the RMOP Subs and the ROP Subs shall hereinafter be collectively
referred to as the "EXISTING OWNERS".

     N. In order to effectuate the contribution and exchange of assets as herein
provided, the Contributors have agreed to contribute all of the outstanding
partnership, membership and/or other ownership interests in and to the Existing
Owners (collectively, the "CONTRIBUTED INTERESTS") to the Partnership in
exchange for a combination of cash, Units, REIT Common Stock and Preferred
Stock.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements
herein contained, and of other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound hereby, do hereby agree as follows:


                                       2
<PAGE>


                       SECTION 1: SUBJECT OF CONTRIBUTION

     Section 1.01. Subject to and in accordance with the terms and conditions of
this Agreement, the Contributors shall contribute and convey or cause to be
contributed and conveyed to the Partnership, the Contributed Interests. Upon
receipt of such Contributed Interests, the Partnership shall, as the beneficial
owner of the Existing Owners, own all of the Existing Owners' right, title and
interest in the following:

     (a) those certain parcels of real property situated, lying and being in the
State of New Jersey and the State of New York and being more particularly
described on SCHEDULE 1.1 - 1.3 HEREOF (the "LAND"), and all of the
improvements, if any, located on the Land (individually, a "BUILDING"),
including, but not limited to, any and all structures and facilities, plumbing,
heating, ventilating, air conditioning, mechanical, electrical and other utility
systems, water and sewage facilities (including wells and septic systems),
parking lots, landscaping, sidewalks, signs and light fixtures, which are not
owned by Tenants (collectively, the "IMPROVEMENTS");

     (b) all rights, privileges, grants and easements appurtenant to the Land
and Improvements, including without limitation, all of the Existing Owners'
right, title and interest in and to all land lying in the bed of any public
street, road or alley, and any and all insurance proceeds or condemnation awards
received by or accrued for the benefit of the Existing Owners and the
Contributors, to the extent such insurance proceeds and/or condemnation awards
are in such Existing Owners' possession as of, and subsequent to the date
hereof, in respect of the applicable Property, all mineral and water rights and
all easements, licenses, covenants and rights-of-way or other appurtenances or
other rights associated with the Property, used in connection with the
beneficial use and enjoyment of the Land and Improvements and any development
rights with respect to the Stults Property and any other development or other
rights associated with any other Property (the Land and Improvements and all
such rights, privileges, easements, grants and appurtenances are sometimes
referred to herein as the "REAL PROPERTY");

     (c) the fixtures, machinery, equipment, and other items of personal
property owned by the Existing Owners, together with all replacements and
substitutions therefor (the "PERSONAL PROPERTY") and used in connection with the
ownership or operation of the Real Property and, to the extent that the value of
any such machinery, equipment or such other personal property exceeds $25,000,
listed on SCHEDULE 2 attached hereto;

     (d) all existing surveys, blueprints, drawings, plans and specifications
(including, without limitation, structural, HVAC, mechanical and plumbing, water
and sewer plans and specifications) and other documentation for or with respect
to the Properties, subject to any proprietary rights, if any, of the architects
and/or engineers who worked on such documents;

     (e) all leases and other agreements with respect to the use and occupancy
of the Real Property, together with all amendments and modifications thereto and
any guaranties or indemnities (including any environmental indemnities) provided
thereunder as set forth on EXHIBIT B hereof (individually, a "LEASE",
collectively, the "LEASES") and rents, additional rents, reimbursements,
profits, income, receipts and the amounts deposited together with any interest


                                       3
<PAGE>

earned thereon, if any, (individually, a "SECURITY DEPOSIT"; collectively, the
"SECURITY DEPOSITS") under any such Leases in the nature of security for the
performance of any Tenant's obligations thereunder including without limitation
any letters of credit given by Tenants as security;

     (f) (i) to the extent transferable, all governmental permits, licenses,
approvals, variances, and certificates relating to the Properties (collectively,
the "PERMITS AND LICENSES") and (ii) all contracts relating to the Properties,
including, without limitation, purchase agreements, Leases and agreements for
the servicing, maintenance, repair and operation of the Real Property (the
"SERVICE CONTRACTS") and any brokerage agreements relating to the Leases (the
"BROKERAGE AGREEMENTS");

     (g) all books, records (including accounting books and records),
promotional material, tenant data, keys, site plans, survey plans and plans and
specifications which are used exclusively in connection with the acquisition,
development, use and operation of the Real Property or Personal Property and all
Title Policies (collectively, the "BOOKS AND RECORDS");

     (h) all guaranties and warranties, to the extent transferable, owned by or
for the benefit of the Existing Owners received in connection with any
construction, repair or maintenance services performed with respect to the Real
Property or Personal Property (the "WARRANTIES");

     (i) all intangible personal property now or hereafter owned by the Existing
Owners and used in connection with, or arising from, the business now or
hereafter conducted on or from the Properties, or any part thereof, including
without limitation, claims, chooses in action and contract rights, PROVIDED,
HOWEVER, such intangible personal property shall not include telephone exchange
numbers and either the Reckson or Morris name;

     (j) correspondence regarding the Properties with past, present and
prospective tenants, vendors, suppliers, utility companies and other third
parties, to the extent such correspondence is in the possession or control of
the Existing Owners and/or the Contributors; and

     (k) all rights under the purchase option agreements described in SCHEDULE 5
attached hereto, including, without limitation, all rights as optionee to
exercise the various purchase options (the "PURCHASE OPTIONS") with respect to
the Land described therein, and all rights under agreements or otherwise with
respect to the contract properties described in SCHEDULE 5 attached hereto (the
"CONTRACT PROPERTIES").

     The Real Property, the Personal Property, the Improvements, the Leases, the
Security Deposits, the Permits and Licenses, the Service Contracts, the
Brokerage Agreements, the Books and Records, the Warranties, the Purchase
Options and all other property interests described in this Section 1 are
hereinafter collectively referred to as the "PROPERTY", as they relate to each
parcel of Land or the "PROPERTIES", as they relate to all the parcels of Land,
in their entirety.


                                       4
<PAGE>



                             SECTION 2: DEFINITIONS

     Section 2.01. For all purposes of this Agreement, except as otherwise
expressly provided or unless the context clearly indicates a contrary intent:

          (i) the capitalized terms defined in this Section have the meanings
     assigned to them in this Section, and include the plural as well as the
     singular; and

          (ii) the words "herein", "hereof", and "hereunder" and other words of
     similar import refer to this Agreement as a whole and not to any particular
     Section or other subdivision.

     "6 JOANNA PROPERTY" shall have the meaning set forth in the Recitals
hereto.

     "19.9% SHAREHOLDER APPROVAL" shall have the meaning set forth in Section
33.01 hereof.

     "22 MADISON REMEDIATION AGREEMENT" shall have the meaning set forth in
Section 29.05 hereof.

     "ACCOUNTANTS" shall have the meaning set forth in Section 27.01 hereof.

     "ACQUIROR MATERIAL ADVERSE EFFECT" shall have the meaning set forth in
Section 12.01 hereof.

     "ADDITIONAL SHAREHOLDER APPROVAL" shall have the meaning set forth in
Section 33.01 hereof.

     "ADDITIONAL STAGE I CONSIDERATION" shall have the meaning set forth in
Section 3.01 hereof.

     "AFFILIATE" as to any Person, shall mean any other Person which, directly
or indirectly, is in control of, is controlled by, or is under common control
with, such Person. For purposes of this definition, "control" of a Person means
the power, directly or indirectly, either to (a) vote 50% or more of the
securities having ordinary voting power for the election of directors of such
Person or (b) direct or cause the direction of the management and policies of
such Person whether by contract or otherwise.

     "AGREEMENT" shall have the meaning set forth in the Recitals hereto.

     "AMEX" shall mean the American Stock Exchange.

     "APPROVAL PROXY" shall have the meaning set forth in Section 33.04 hereof.

     "ARE" shall have the meaning set forth in Section 35.01 hereto.


                                       5
<PAGE>


     "ASSIGNMENT AND ASSUMPTION AGREEMENT" shall mean the Assignment and
Assumption Agreement in the form of EXHIBIT J attached hereto.

     "BOARD APPROVAL" shall have the meaning set forth in Section 33.01 hereof.

     "BOARD OF ARE" shall have the meaning set forth in Section 31.01 hereof.

     "BOARD DESIGNEES" shall have the meaning set forth in Section 31.01 hereof.

     "BOOKS AND RECORDS" shall have the meaning set forth in Section 1.01
hereof.

     "BROKERAGE AGREEMENTS" shall have the meaning set forth in Section 1.01
hereof.

     "BUILDING" shall have the meaning set forth in Section 1.01 hereof.

     "BUSINESS DAY" shall mean any day other than a Saturday, Sunday or State of
New York or federal legal holiday.

     "C&I LEASE" shall mean that certain lease dated April 1997 between Mercrock
Associates, L.P., as original landlord, and C&I Promotions, Inc., as tenant, as
amended.

     "CASUALTY NOTICE" shall have the meaning set forth in Section 8 hereof.

     "CHARTER" shall have the meaning set forth in Section 23.04 hereof.

     "CLOSINGS" shall mean closings collectively, of the transactions
contemplated by this Agreement, including, the Stage I Closing, the Stage II
Closings, the Stage III Closing and any other closing contemplated hereunder.

     "CLOSING DATES" shall mean the dates when any of the Contributed Interests
are transferred to the Partnership in accordance with the terms and conditions
of this Agreement.

     "CLOSING MONTH" shall have the meaning set forth in Section 7.01 hereof.

     "CODE" shall mean the Internal Revenue Code of 1986, as amended.

     "COMPANY" shall have the meaning set forth in the Recitals hereof.

     "COMPANY PLAN" means a Plan which any applicable Existing Owner, or any
ERISA Affiliate thereof sponsors, maintains, has any obligation to contribute
to, has liability under or is otherwise a party to, or which otherwise provides
benefits for employees, former employees, independent contractors or former
independent contractors (or their dependents and beneficiaries) of such Existing
Owner existing on the date of this Agreement or at any time subsequent thereto
and on or prior to the applicable Closing and, in the case of a Plan which is
subject to Part 3 of Subtitle B of Title I of ERISA, Section 412 of the Code or
Title IV of ERISA, at any time during the five-year period preceding the date of
this Agreement.


                                       6
<PAGE>


"COMPLIANT PLAN" shall mean a Company Plan with the following characteristics:

          (i) the Company Plan is, and its administration is and has been in
     compliance with, and no applicable Existing Owner has received any claim or
     notice that any such Company Plan is not in material compliance with, its
     terms and all applicable laws, including, without limitation, the
     requirements of ERISA and all tax rules compliance with which are necessary
     for any intended favorable tax treatment;

          (ii) all contributions, premiums and other payments required by law or
     any Plan or applicable collective bargaining agreement to have been made
     under any such Plan (without regard to any waivers granted under Section
     412 of the Code) to any fund, trust or account established thereunder or in
     connection therewith have been made by the due date thereof, and no amounts
     are or will be due to the PBGC (except for premiums in the ordinary course
     of business); and any and all contributions, premiums and other payments
     with respect to compensation or service before and through the applicable
     Closing, or otherwise with respect to periods before and through the
     applicable Closing, due from the applicable Existing Owner or its
     affiliates to, under or on account of each Company Plan shall have been
     paid prior to the applicable Closing;

          (iii) no Company Plan that is or has ever been subject to Part 3 of
     Subtitle B of Title I of ERISA or Section 412 of the Code has incurred any
     "accumulated funding deficiency" (as defined therein), whether or not
     waived, no liability under Title IV of ERISA has been incurred or is
     expected to be incurred with respect to any such Plan subject thereto
     (other than premiums incurred and paid when due), nor has there been any
     "reportable event" within the meaning of Section 4043(c) of ERISA with
     respect to any such Plan (other than events as to which the 30-day notice
     requirement has been waived);

          (iv) the actuarial present value on a termination basis of accrued
     benefits under each of the Company Plans sponsored by the applicable
     Existing Owner or any ERISA Affiliate thereof which is subject to Title IV
     of ERISA, based upon the interest rate assumptions that would be utilized
     by the PBGC to value annuities for a pension plan termination and the other
     actuarial assumptions and methods currently used for such Company Plan, did
     not, as of its latest valuation date, exceed the then current value of the
     assets of such Company Plan;

          (v) neither the applicable Existing Owner nor any ERISA Affiliate has
     at any time had any obligation to contribute to any "multiemployer plan" as
     defined in Section 3(37) of ERISA; and

          (vi) with respect to each such Plan, true, correct, and complete
     copies of the applicable following documents have been made available to
     the Partnership: (A) all current Plan documents and related trust
     documents, and any amendment thereto; (B) Forms 5500, financial statements,
     and actuarial reports for the last three Plan years; (C) the most recently
     issued IRS determination letter; (D) summary plan descriptions and all
     summaries of material modifications; and (E) all written communications to
     employees relating to such Plans.


                                       7
<PAGE>


     "CONDEMNATION NOTICE" shall have the meaning set forth in Section 9 hereof.

     "CONSIDERATION" shall mean, with respect to the Closings contemplated
hereunder, the Stage I Consideration, the Additional Stage I Consideration, the
Stage II Consideration and the Stage III Consideration.

     "CONTINGENCY LLC" shall have the meaning set forth in Section 11.05 hereof.

     "CONTRACT PERIOD" shall mean, with respect to each Property, the period
commencing on the date of this Agreement and ending on the Closing Date with
respect to the transfer of the Contributed Interests relating to such Property.

     "CONTRACT PROPERTIES" shall have the meaning set forth in Section 1.01
hereof.

     "CONTRACTS" shall mean the contracts of sale with respect to the
acquisition of the Contract Properties, the Purchase Options, the Brokerage
Agreements and the Service Contracts.

     "CONTRIBUTED INTERESTS" shall have the meaning set forth in the Recitals
hereof.

     "CONTRIBUTORS" shall mean each of the Persons set forth in EXHIBIT A
annexed hereto.

     "DEVELOPMENT CONSULTING FEES" shall have the meaning set forth in Section
3.01 hereof.

     "DEVELOPMENT LLC" shall have the meaning set forth in Section 34.01 hereof.

     "DEVELOPMENT PROPERTY" shall have the meaning set forth in Section 34.01
hereof.

     "DISPUTE PERIOD" shall mean the period ending thirty (30) calendar days
following receipt by an Indemnifying Party of an Indemnity Notice.

     "DOWNPAYMENT AMOUNT" shall have the meaning set forth in Section 3.04
hereof.

     "ENVIRONMENTAL LAWS" shall mean all foreign, federal, state and local laws,
regulations, rules and ordinances relating to pollution or protection of the
environment, including, without limitation, laws relating to releases or
threatened releases of hazardous substances, oils, pollutants or contaminants
into the indoor or outdoor environment (including, without limitation, ambient
air, surface water, groundwater, land, surface and subsurface strata) or
otherwise relating to the manufacture, processing, distribution, use, treatment,
storage, release, transport or handling of hazardous substances, oils,
pollutants or contaminants expressly intending to include without limitation
asbestos.

     "EQUITY" shall mean the Units, Preferred Stock and the REIT Common Stock.

     "EQUITY HOLDERS" shall mean the holders of any Units, REIT Common Stock or
Preferred Stock issued as part of the transaction contemplated hereunder.


                                       8
<PAGE>


     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

     "ERISA AFFILIATE" means an entity required to be aggregated with any
Existing Owner under Sections 414(b), (c), (m) or (o) of the Code or Section
4001 of ERISA.

     "ESCROW AGENT" shall mean Commonwealth Land Title Insurance Company.

     "EVIDENCE OF ISRA COMPLIANCE" shall have the meaning set forth in Section
29.01 hereof.

     "EXISTING MORTGAGES" shall mean those certain mortgages, if any, described
in SCHEDULE 3 attached hereto, which mortgages currently encumber certain of the
Properties and have the respective outstanding principal balances set forth on
SCHEDULE 3 attached hereto.

     "EXISTING OWNERS" shall have the meaning set forth in the Recitals hereof.

     "FORM OF OPERATING AGREEMENT" shall have the meaning set forth in Section
34.01 hereof.

     "GAIN YEAR" shall have the meaning set forth in Section 30.02 hereof.

     "GOVERNMENTAL OR REGULATORY AUTHORITY" shall mean any court or governmental
department, commission, board, agency or instrumentality, of the United States
or any state, county, city or other political subdivision.

     "GP" shall have the meaning set forth in the Recitals hereto.

     "GUARANTY" shall have the meaning set forth in Section 22.01 hereof.

     "IMPROVEMENTS" shall have the meaning set forth in Section 1.01 hereof.

     "INDEMNIFIED PARTY" shall mean any Person claiming indemnification under
any provision of Section 35.03 hereof.

     "INDEMNIFYING PARTY" shall mean any Person providing indemnification under
any provision of Section 35.03 hereof.

     "INDEMNITY NOTICE" shall mean written notification pursuant to Section 35
hereof of a claim for indemnity under Section 35.03 hereof by an Indemnified
Party, specifying the nature of and basis for such claim, together with the
amount or, if not then reasonably ascertainable, the estimated amount,
determined in good faith, of such claim.

     "INDEMNITY PERCENTAGE" shall have the meaning set forth in Section 30.02
hereof.

     "INDEMNITY REMEDY" shall have the meaning set forth in Section 30.02
hereof.


                                       9
<PAGE>


     "INVESTED PRINCIPAL CAPITAL" shall have the meaning set forth in Section
34.01 hereof.

     "ISRA" shall have the meaning set forth in Section 29.01 hereof.

     "JOANNA" shall have the meaning set forth in the Recitals hereof.

     "KRAFT PROPERTY" shall have the meaning set forth in Section 34.01 hereof.

     "LAND" shall have the meaning set forth in Section 1.01 hereof.

     "LANDLORD ESTOPPEL" shall have the meaning set forth in Section 32.01
hereof.

     "LEASE BROKER" shall have the meaning set forth in Section 10.18 hereof.

     "LEASES" shall have the meaning set forth in Section 1.01 hereof.

     "LEASING GUIDELINES" shall mean leasing guidelines set forth on SCHEDULE 18
hereto with respect to the execution of new Leases of space in the Properties
and the renewal and/or modification of any new or existing Leases.

     "LETTER OF CREDIT" shall mean the letter of credit described in Section
3.04 hereof.

     "LIEN" shall mean any mortgage, pledge, assessment, security interest,
lease, lien, adverse claim, levy, charge or other encumbrance of any kind, or
any conditional sale contract, title retention contract or other agreement to
give any of the foregoing.

     "LNA" shall have the meaning set forth in Section 29.01 hereof.

     "LOAN REMEDY" shall have the meaning set forth in Section 30.02 hereof.

     "LOSS" or "LOSSES" shall mean actual damage, loss, liability (including
punitive or exemplary fines and penalties, and interest thereon) cost or expense
(including reasonable costs of investigation and defense incurred in defending
against and/or settling such damage, loss, cost or expense or claim therefor and
any amounts paid in settlement thereof and reasonable fees and disbursements of
counsel) imposed on, or incurred by, the REIT, the Partnership, the Contributors
or the Existing Owners, as applicable.

     "LP TAX LIABILITY" shall have the meaning set forth in Section 30.02
hereof.

     "MAJOR TENANTS" shall mean the Tenants set forth on SCHEDULE 15 hereto.

     "MATERIAL ADVERSE EFFECT" shall mean, with respect to any of the Existing
Owners, the REIT, the Partnership or the Properties, one or more Losses that
individually or in the aggregate exceed $20,000,000, unless such Loss or Losses
result from or arise out of a misrepresentation or inaccuracy in, or breach of a
representation or warranty set forth in Section 10.18(a) hereof, in which case a
Material Adverse Effect shall mean any Loss or Losses that, individually or in
the


                                       10
<PAGE>

aggregate, exceed $3,500,000 or unless such Loss or Losses result from or arise
out of a misrepresentation or inaccuracy in, or breach of a representation or
warranty set forth in Section 10.18(b) or (c) hereof, in which case a Material
Adverse Effect shall mean any Loss or Losses that, individually or in the
aggregate, exceed $2,000,000 or unless such Loss or Losses result from or arise
out of a misrepresentation or inaccuracy in, or breach of a representation or
warranty set forth in Section 23, in which case a Material Adverse Effect shall
mean any Loss or Losses.

     "MATRIX" shall mean Matrix Development Group LLC, or any Affiliate thereof.

     "MAXIMUM ROP PAYMENT" shall have the meaning set forth in Section 30.02
hereof.

     "MECHANICS LIEN AND ENVIRONMENTAL INDEMNITY" shall have the meaning set
forth in Section 5.02 hereof.

     "MIDDLESEX PREMISES" shall have the meaning set forth in Section 7.06
hereof.

     "MIDDLESEX PREPAYMENT" shall have the meaning set forth in Section 7.06
hereof.

     "MIDDLESEX RENTAL PAYMENTS" shall have the meaning set forth in Section
7.06 hereof.

     "MODIFIED LOAN REMEDY" shall have the meaning set forth in Section 30.02
hereof.

     "MORRIS CONTRIBUTORS" shall have the meaning set forth in the Recitals
hereto.

     "MORRIS ENTITY " shall have the meaning set forth in Section 34.01 hereof.

     "MORRIS EXCEPTED HOLDERS" shall mean Joseph D. Morris, Robert Morris, the
Morris Partnerships and the Morris Trusts.

     "MORRIS PARTNERSHIPS" shall mean Joseph D. Morris Family Limited
Partnership and Robert Morris Family Limited Partnership, collectively.

     "MORRIS REPRESENTATION LETTER" shall mean a letter in the form of EXHIBIT Y
attached hereto.

     "MORRIS TRUSTS" shall mean The Drew Morris Trust, The Justin Morris Trust
and The Keith Morris Trust, collectively.

     "MORRIS WAIVER OF OWNERSHIP LIMITS LETTER" shall mean a letter in the form
of EXHIBIT Z attached hereto.

     "NEGATIVE DECLARATION APPROVAL" shall have the meaning set forth in Section
29.01 hereof.

     "NEW LEASE" shall have the meaning set forth in Section 7.01 hereof.


                                       11
<PAGE>


     "NEW LEASE COSTS" shall have the meaning set forth in Section 7.01 hereof.

     "NIXON" shall have the meaning set forth in the Recitals hereto.

     "NIXON PARK PROPERTY" shall have the meaning set forth in the Recitals
hereto.

     "NJDEP" shall have the meaning set forth in Section 29.01 hereof.

     "OFFER WAIVER" shall have the meaning set forth in Section 11.05 hereof.

     "ORGANIZATIONAL DOCUMENTS" shall mean, with respect to any Person, such
Person's articles of incorporation, certificate of incorporation, by-laws,
certificate of limited partnership, partnership agreement, limited liability
certificate, limited liability agreement, operating agreement, trust agreement,
declaration of trust and other organizational document, as applicable.

     "PARTNERSHIP" shall mean American Real Estate Investment, L.P.

     "PARTNERSHIP AGREEMENT" shall mean the amended and restated agreement of
limited partnership of the Partnership dated as December 12, 1997, as amended
pursuant to amendments, dated April 29, 1998, July 9, 1998, August 19, 1998,
December 4, 1998, December 22, 1998, December 23, 1998 and June 9, 1999.

     "PBGC" means the Pension Benefit Guaranty Corporation.

     "PERCENTAGE INTERESTS" shall mean, with respect to each Existing Owner,
RMIT's, RMIIGP's, ROP's and the Morris Contributors' respective percentage
ownership interest in such Person, all as more particularly set forth in
SCHEDULE 8 attached hereto.

     "PERMITS AND LICENSES" shall have the meaning set forth in Section 1.01
hereof.

     "PERMITTED ENCUMBRANCES" shall mean those restrictions, covenants,
agreements, easements, matters and things of record affecting title to the
Property which are listed on EXHIBIT D attached hereto and/or are listed as
recorded documents (other than financing or loan documents or instruments
referencing leases which are not also referenced on EXHIBIT B hereto) in the
Title Policies.

     "PERSON" shall mean any individual, partnership, limited liability company,
corporation, trust, governmental entity or any other type of entity.

     "PERSONAL PROPERTY" shall have the meaning set forth in Section 1.01
hereof.

     "PLAN" means any employment, bonus, incentive compensation, deferred
compensation, pension, profit sharing, retirement, stock purchase, stock option,
stock ownership, stock appreciation rights, phantom stock, equity (or
equity-based) leave of absence, layoff, vacation, day or dependent care, legal
services, cafeteria, life, health, medical, accident, disability,


                                       12
<PAGE>


workmen's compensation or other insurance, severance, separation, termination,
change of control or other benefit plan, agreement (including any collective
bargaining agreement), practice, policy or arrangement of any kind, whether
written or oral, and whether or not subject to ERISA, including, but not limited
to any "employee benefit plan" within the meaning of Section 3(3) of ERISA.

     "PREFERRED STOCK" shall mean the Series B Convertible Preferred Stock, par
value $.001 per share, of the REIT issued in connection with the transactions
contemplated by this Agreement.

     "PREVIOUSLY PURCHASED OPTION PROPERTIES" shall mean the Properties
described on SCHEDULE 1.3 hereof.

     "PROPERTY" shall have the meaning set forth in Section 1.01 hereof.

     "PURCHASE OPTIONS" shall have the meaning set forth in Section 1.01 hereof.

     "RA" shall mean Reckson Associates Realty Corp., a Maryland corporation.

     "RA SHARE" shall have the meaning set forth in Section 30.02 hereof.

     "RA TAX LIABILITY" shall have the meaning set forth in Section 30.02
hereof.

     "REAL ESTATE TAXES" shall mean real estate taxes, personal property taxes,
ad valorem taxes and any general or special assessments (exclusive of penalties
and interest thereon, all of which are to be paid prior to Closing by the
Contributors) imposed upon the Real Property, including but not limited to any
general or special assessments of any governmental or municipal authority or tax
district, including, without limitation, any assessments levied for public
benefits to the Real Property.

     "REAL PROPERTY" shall have the meaning set forth in Section 1.01 hereof.

     "RECKSON CONSTRUCTION" shall have the meaning set forth in Section 3.01
hereof.

     "RECKSON REPRESENTATION LETTER" shall mean a representation letter in the
form of EXHIBIT K hereto.

     "RECKSON WAIVER OF OWNERSHIP LIMITS LETTER" shall mean a letter in the form
of EXHIBIT L hereto.

     "REGISTRATION RIGHTS AGREEMENT" shall mean the registration rights
agreement in the form of EXHIBIT E attached hereto.

     "REIT" shall mean American Real Estate Investment Corporation, a Maryland
corporation and any successor entity, including Keystone Property Trust, a
Maryland real estate investment trust.


                                       13
<PAGE>


     "REIT COMMON STOCK" shall mean the common stock, par value $.001 per share,
of the REIT.

     "REIT MATERIAL ADVERSE EFFECT" shall have the meaning set forth in Section
12.01 hereof.

     "REMEDIATION IN PROGRESS WAIVER" shall have the meaning set forth in
Section 29.01 hereof.

     "RENTS" shall mean, collectively, all minimum rent and additional rent
(including all escalations and tax and expense pass-throughs) payable by the
Tenants under the Leases.

     "REQUISITE APPROVALS" shall have the meaning set forth in Section 33.01
hereof.

     "RMIIGP" shall have the meaning set forth in the Recitals hereto.

     "RMIT" shall have the meaning set forth in the Recitals hereto.

     "RMOP" shall have the meaning set forth in the Recitals hereto.

     "RMOP CONTRIBUTORS" shall have the meaning set forth in the Recitals
hereto.

     "RMOP LIMITED PARTNERSHIP AGREEMENT" shall mean that certain amended and
restated agreement of limited partnership or Reckson Morris Operating
Partnership, L.P., dated as of January 6, 1998, as amended pursuant to that
certain amendment to amended and restated agreement of limited partnership dated
October 27, 1998.

     "RMOP SUBS" shall have the meaning set forth in the Recitals hereto.

     "ROP" shall have the meaning set forth in the Recitals hereto.

     "ROP CONSENT PROPERTIES" shall have the meaning set forth in Section 3.01
hereof.

     "ROP DESIGNEE" shall have the meaning set forth in Section 31.01 hereof.

     "ROP SUBS" shall have the meaning set forth in the Recitals hereto.

     "SEC" shall have the meaning set forth in Section 12.01 hereof.

     "SEC DOCUMENTS" shall have the meaning set forth in Section 12.01 hereof.

     "SECTION 704(C) GAIN" shall have the meaning set forth in Section 30.01
hereof.

     "SECURITIES ACT" shall have the meaning set forth in Section 23.05 hereof.

     "SECURITY DEPOSITS" shall have the meaning set forth in Section 1.01
hereof.


                                       14
<PAGE>

     "SERVICE CONTRACTS" shall have the meaning set forth in Section 1.01
hereof.

     "STABILIZATION" shall have the meaning set forth in Section 3.01 hereof.

     "STABILIZATION NOTICE" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE I CLOSING DATE" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE I CONSIDERATION" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE I ISRA DEFECT" shall have the meaning set forth in Section 29.02
hereof.

     "STAGE I PROPERTIES" shall have the meaning set forth in the Recitals
hereto.

     "STAGE II CLOSING DATE" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE II CONSIDERATION" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE II PROPERTIES" shall have the meaning set forth in the Recitals
hereto.

     "STAGE III CLOSING DATE" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE III CONSIDERATION" shall have the meaning set forth in Section 3.01
hereof.

     "STAGE III PROPERTIES" shall have the meaning set forth in the Recitals
hereto.

     "STULTS" shall have the meaning set forth in the Recitals hereto.

     "STULTS PROPERTY" shall have the meaning set forth in the Recitals hereto.

     "SUBSIDIARY" shall mean with respect to any Person, any corporation,
limited partnership or other entity of which such Person owns, directly or
indirectly, more than 50% of the outstanding voting stock or other equity
interests.

     "SUBSTANTIAL ARE POSITION" shall have the meaning set forth in Section
36.01 hereof.

     "SUBSTANTIAL CASUALTY" shall mean one or more fires or other casualties
which, collectively, (i) entitle one or more Tenants of any of the Prospect
Plains Road/Cranbury, Teterboro or Nixon Park Properties which, in the
aggregate, are obligated to pay rent in excess of $2,000,000 per annum, to
terminate their Leases or (ii) entitle one or more Tenants of any of two (2) or
more other Properties which, in the aggregate, are obligated to pay rent in
excess of $2,000,000 per annum, to terminate their Leases.

     "SUBSTANTIAL CONDEMNATION" shall mean settled condemnation or eminent
domain proceedings which result in a taking of (i) all or a portion of the
Prospect Plains Road/Cranbury, Teterboro or Nixon Park Properties and which
entitle one or more Tenants of any of such Properties which, in the aggregate,
are obligated to pay rent in excess of $2,000,000 per annum, to terminate their
Leases or (ii) all or a portion of two (2) or more other Properties and which
entitle one or more Tenants of any of such


                                       15
<PAGE>

Properties which, in the aggregate, are obligated to pay base rent in excess of
$2,000,000 per annum, to terminate their Leases.

     "TAX LIABILITY" shall have the meaning set forth in Section 30.02 hereof.

     "TENANTS" shall mean all of the tenants of the Improvements listed on
EXHIBIT B attached hereto, together with any tenants under Leases hereafter
entered in accordance with the terms of this Agreement.

     "TERMINATION NOTICE" shall have the meaning set forth in Section 8 hereof.

     "TITLE COMMITMENTS" shall mean the title insurance commitments issued by
the Title Insurer with respect to the Properties obtained by the Partnership in
connection with the transaction contemplated hereunder.

     "TITLE INSURER" shall mean Commonwealth Land Title Insurance Company or any
other title company acceptable to the Partnership and the Contributors.

     "TITLE POLICIES" shall have the meaning set forth in Section 6.01 hereof.

     "TRANSFER TAXES" shall have the meaning set forth in Section 3.06 hereof.

     "UNIT VALUE" shall have the meaning set forth in Section 3.02 hereof.

     "UNPERMITTED ENCUMBRANCES" shall have the meaning set forth in Section 6.02
hereof.

     "UNITS" shall mean Series C Preferred Limited Partnership Units in the
Partnership.

     "VACANT CABOT DRIVE LAND" shall have the meaning set forth in Section 3.01
hereof.

     "WARRANTIES" shall have the meaning set forth in Section 1.01 hereof.

     "YEAR 2000 COMPLIANT" shall mean, with respect to any Person, that (a) the
performance and functionality of the operating systems for such Person's
computers, all software applications that run on such computers and all of such
Person's machinery and equipment (including without limitation, any machinery or
equipment with an embedded microprocessor) shall accurately process date data
(including, without limitation, dates prior to, during, spanning or after
January 1, 2000) and (b) such Person's business operations and financial
condition will not be materially interrupted, delayed, decreased or otherwise
materially adversely affected by the occurrence of the year 2000.



                                       16
<PAGE>



                 SECTION 3: TRANSFER OF PROPERTY; CONSIDERATION

     Section 3.01. (a) On September 10, 1999 or such other date as the parties
may agree (the "STAGE I CLOSING DATE")(provided the RMOP Contributors shall use
commercially reasonable efforts to close prior to September 10, 1999 if the RMOP
Contributors receive five (5) Business Days prior written notice from the
Partnership that it desires to close earlier than September 10, 1999 but in no
event shall the Stage I Closing Date occur earlier than August 26, 1999), the
RMOP Contributors shall contribute and transfer to the Partnership or the REIT,
as applicable, and the Partnership and the REIT, as applicable, shall accept
from the RMOP Contributors, subject to and in accordance with the terms,
provisions, covenants and conditions set forth in this Agreement, all of the
existing partnership interests in RMOP, and in consideration of such
contribution the Partnership and the REIT agree to deliver, or cause to be
delivered, the Stage I Consideration (as hereinafter defined) to the RMOP
Contributors. For purposes of this Agreement, the "STAGE I CONSIDERATION" to be
paid by the Partnership and the REIT to the RMOP Contributors for their
interests in RMOP shall have an aggregate value of $199,125,048, subject to the
terms and provisions hereof providing for adjustments, if any, and shall be paid
and delivered as set forth on the Stage I Consideration Schedule attached hereto
as SCHEDULE 17.1.

     (b) In addition to the Stage I Consideration, the Partnership shall pay to
the RMOP Contributors (other than RMIIGP), based on their respective ownership
interests in RMOP at the Stage I Closing, an amount (the "ADDITIONAL STAGE I
CONSIDERATION") in cash equal to (x)$212,510, which amount is equal to the costs
previously incurred by RMIT and the Morris Contributors with respect to the
Purchase Options, the Contract Properties (other than Givaudan, the Cranbury
River Road and the Herrod Boulevard Purchase Options and 50% of the NL Site and
the US Generating Site) and certain other properties, including, without
limitation, the cost of real estate taxes, insurance and obtaining approvals
(and which costs are set forth on SCHEDULE 28 attached hereto) plus (y) such
additional costs with respect to such properties (and the 259 Prospect Plains
Road/Cranbury Property and the Kraft Property) which are incurred during the
Contract Period and are referenced on SCHEDULE 28 attached hereto. Additionally,
on the Stage I Closing Date, the Morris Contributors shall pay RMIT an amount
equal to the sum of (x) $583,056, which amount is equal to certain costs
previously incurred by RMIT with respect to the Cranbury River Road and the
Herrod Boulevard Purchase Options and Givaudan and 50% of the NL Site and the US
Generating Site plus (y) such additional costs with respect to such Properties
which are incurred during the Contract Period. All of the costs referred to in
this Section 3.01(b) are more particularly set forth on SCHEDULE 28 attached
hereto.

     (c) The contribution of the RMOP Contributors' (other than RMIIGP)
membership interests in the RMOP Subs may occur in up to three stages. On or
about the date (each, a "STAGE II CLOSING DATE") with respect to each Stage II
Property which shall be the earlier to occur of (i) twenty (20) Business Days
after the Partnership shall have received copies of all executed Leases with
respect to such Stage II Property, together with a written notice (a
"STABILIZATION NOTICE") from RMIT stating that such Stage II Property has
achieved Stabilization (as hereinafter defined) and (ii) April 30, 2000, or such
other date as the parties may



                                       17
<PAGE>


agree, the RMOP Contributors (other than RMIIGP) shall contribute and transfer
to the Partnership, and in consideration of such contribution, the Partnership
shall accept from the RMOP Contributors (other than RMIIGP), subject to and in
accordance with the terms, provisions, covenants and conditions set forth in
this Agreement, all of the membership interests in the applicable RMOP Sub, and
the Partnership shall deliver or cause to be delivered to the RMOP Contributors
the applicable Stage II Consideration (as hereinafter defined). For purposes of
this Agreement, the "STAGE II CONSIDERATION" to be paid by the Partnership to
the RMOP Contributors (other than RMIIGP) for the interests in the RMOP Subs
shall have a value of $50,798,180, in the aggregate, subject to the terms and
provisions hereof providing for adjustments, if any, and shall be paid and
delivered as set forth on the Stage II Consideration Schedule attached hereto as
SCHEDULE 17.2. As used herein, "STABILIZATION" shall mean, with respect to any
Stage II Property, the date such Property shall be 95% leased to bona-fide third
party Tenants under Leases which comply with the Leasing Guidelines, with the
Tenants thereunder in occupancy and obligated to pay Rent (it being understood
that if a Tenant is obligated to pay Rent but is in default with respect to the
same, such Tenant will be deemed to be "obligated to pay Rent").

     (d) On April 30, 2000, or such other date as the parties may agree (the
"STAGE III CLOSING DATE"), ROP shall contribute and transfer to the Partnership,
and the Partnership shall accept from ROP, subject to and in accordance with the
terms, provisions, covenants and conditions set forth in this Agreement, all of
the partnership, membership, or other ownership interests in the ROP Subs, and
in consideration of such contribution, the Partnership agrees to deliver or
cause to be delivered the Stage III Consideration (as hereinafter defined) to
ROP. For purposes of this Agreement, the "STAGE III CONSIDERATION" to be paid by
the Partnership to ROP for its partnership interests in the ROP Subs shall have
a value of $51,742,074, in the aggregate, subject to the terms and provisions
hereof providing for adjustments, if any, and shall be paid and delivered as set
forth on the Stage III Consideration Schedule attached hereto as SCHEDULE 17.3.

     (e) Notwithstanding anything herein to the contrary, the Partnership
acknowledges that a portion of the Stage III Properties commonly referred to as
the vacant land adjacent to 400 Cabot Drive (the "VACANT CABOT DRIVE LAND") is
contemplated to be sold to Matrix Development Group LLC (or an affiliate
thereof) pursuant to a contract of sale to be entered into. If, by the Stage III
Closing Date, the Vacant Cabot Drive Land is acquired by, or under contract to,
Matrix Development Group LLC (or any affiliate thereof), then (i) the
Partnership shall not acquire the Vacant Cabot Drive Land, (ii) the Vacant Cabot
Drive Land shall not be deemed a Stage III Property and (iii) the purchase price
for the Stage III Properties shall be decreased by the purchase price allocated
to the Vacant Cabot Drive Land (as set forth on Schedule 9 attached). If, by the
Stage III Closing Date, the Vacant Cabot Drive Land is not acquired by, or under
contract to, Matrix Development Group LLC (or any affiliate thereof), then (x)
the Partnership shall acquire the Vacant Cabot Drive Land on the Stage III
Closing Date, (y) the Vacant Cabot Drive Land shall be deemed a Stage III
Property and (z) the purchase price for the Stage III Properties shall be
decreased by any deposit forfeited by Matrix Development Group LLC (or its
affiliate) under its contract of sale with respect to the Vacant Cabot Drive
Land. If all of the


                                       18
<PAGE>


equity interests in the Existing Owner with respect to the Vacant Cabot Drive
Land are not acquired by the Partnership on the Stage III Closing Date pursuant
to the provisions this paragraph and, subsequent to the Stage III Closing Date
(but prior to January 1, 2002), ROP becomes the sole owner of such equity
interest, then, (x) upon thirty (30) days prior written notice from ROP, the
Partnership shall acquire all of ROP's equity interest in the Existing Owner
with respect to the Vacant Cabot Drive Land and (y) the Vacant Cabot Drive Land
shall be deemed a Stage III Property (except that the Closing Date shall occur
thirty (30) days after the Partnership's receipt of such notice).

     (f) In addition to the foregoing, upon completion of the Stage I Closing,
the Partnership will be deemed to have entered into a development consulting
arrangement whereby the Partnership agrees to pay development consulting fees
(the "DEVELOPMENT CONSULTING FEES") equal to $3,700,000 to Reckson Construction
Group, Inc. ("RECKSON CONSTRUCTION") as consideration for certain development
services to be performed by Reckson Construction in connection with the
Partnership's and the REIT's acquisition of the applicable Contributors'
interests in the Purchase Options, the Contract Properties and the vacant land
adjacent to the 400 Cabot Drive (if acquired) and Prospect Plains Road/Cranbury
Properties, pursuant to the transactions contemplated hereunder, which
development services have been requested by or on behalf of the Partnership
prior to the date hereof. Such fees for services shall be payable monthly in
twelve (12) installments of $308,333.34, with the first such installment payable
on January 1, 2000, and the subsequent installments due on the first day of each
subsequent calendar month thereafter through and including December 1, 2000.

     (g) On or about the Stage II Closing Date and the Stage III Closing Date
(including up to sixty (60) days following such Closing Dates), RMIT, ROP or any
or their Affiliates holding Preferred Stock shall have the right to elect, by
delivering written notice to the REIT, to require the REIT to redeem Preferred
Stock at a price per share equal to the liquidation preference of such Preferred
Stock plus accumulated but unpaid dividends through the date of redemption (with
dividends and distributions being payable with respect to the redeemed Preferred
Stock on a pro rata basis for the number of days such Preferred Stock is
outstanding during the relevant quarter) in an amount not to exceed the excess
of the aggregate liquidation preference of the Preferred Stock and Units then
owned by RMIT, ROP and any of their Affiliates over $40,000,000. The REIT shall
pay the proceeds of such redemption to RMIT, ROP or such Affiliate within two
(2) Business Days of the REIT's receipt of the request for redemption.

     (h) It is expressly understood that the Partnership will repay all amounts
due under that certain construction loan from ROP to Nixon (which construction
loan shall be one of the Existing Mortgages assumed by the Partnership, shall be
prepayable without fee or premium on or after the Stage II Closing Date and
shall have an outstanding principal balance which shall not exceed the cash and
assumed indebtedness portions of the applicable Stage II Consideration) on the
applicable Stage II Closing Date.

     Section 3.02. For purposes of this Agreement, each Unit and share of
Preferred Stock to be issued as consideration for the Property, shall have a
liquidation preference (excluding any



                                       19
<PAGE>


accrued and unpaid dividends) and an initial agreed on value equal to $25 (the
"UNIT VALUE"). For purposes of this Agreement, each share of REIT Common Stock
to be issued at the Stage I Closing Date shall have a value equal to the average
closing price as reported on the AMEX (or in the event the REIT Common Stock is
not listed on the AMEX, on such other national securities exchange on which such
REIT's Common Stock is listed) for a share of REIT Common Stock during the
thirty (30) day period immediately preceding the day which is three (3) Business
Days prior to the Stage I Closing Date.

     Section 3.03. Distributions payable with respect to the Units or Preferred
Stock issued at a Closing for the quarter in which they were received by the
applicable Equity Holders shall be made on a pro rata basis based upon the
number of days that such Equity Holder held its interest during the calendar
quarter in which the applicable Closing occurred. The Equity Holders acknowledge
and agree that (i) distributions with respect to the Units and the Preferred
Stock are paid in arrears, and (ii) any distributions paid to such applicable
Equity Holders in excess of the pro rata amount payable to such Equity Holder
shall be promptly repaid to the REIT by such Equity Holder.

     Section 3.04. Simultaneous with the execution of this Agreement, the
Partnership has either (i) deposited the sum of $7,500,000 by certified check or
wire transfer with the Escrow Agent pursuant to Section 26 hereof or (ii)
provided the Escrow Agent with a standby and irrevocable letter of credit (the
"LETTER OF CREDIT") in an amount equal to $7,500,000, which letter of credit
shall be drawable on sight draft, have a term of not less than 360 days and
otherwise be in form and substance and from an institution, acceptable to RMIT,
in its reasonable discretion. On the Stage I Closing Date, the amount of the
deposit or Letter of Credit required under this Section 3.04 shall be increased
to $10,000,000 and the Partnership shall deposit an additional $2,500,000 with
the Escrow Agent (or increase the amount of the Letter of Credit by $2,500,000
as applicable). For purposes of this Agreement, the term "DOWNPAYMENT AMOUNT"
shall mean the amount of the deposit or Letter of Credit which is required under
this Section 3.04.

     Section 3.05. The parties hereto agree that the Consideration shall be
allocated among the Properties in accordance with SCHEDULE 9 attached.

     Section 3.06. The parties agree that (i) the Partnership shall pay any real
estate transfer and conveyance taxes payable to the appropriate state and/or
local governmental and/or municipal authorities (collectively, the "TRANSFER
TAXES") with respect to the Properties located in the State of New Jersey and
arising from the Partnership's acquisition of the equity interests in the
Existing Owners and (ii) the applicable Contributors shall pay any Transfer
Taxes due and payable with respect to the Properties located in the State of New
York and arising from the Partnership's acquisition of the equity interests in
the Existing Owners.

                            SECTION 4: "AS IS" SALE

     Section 4.01. Except as specifically set forth in this Agreement or in any
Closing certificate required pursuant to Section 11.01(c) hereof, neither the
Contributors nor the Existing


                                       20
<PAGE>


Owners make any representations or warranties of any kind to either the
Partnership or the REIT with respect to the Properties, the Existing Owners or
the Contributed Interests including without limitation, representations and
warranties regarding the physical condition of the Properties or their
suitability for any particular purpose. Further, the Partnership acknowledges
that it has completed its due diligence and has had an opportunity to, among
other things, independently inspect the Properties and perform any tests and/or
studies desired by the Partnership in connection therewith and that the
Partnership has entered into this Agreement based upon such examination and
inspection and the Partnership agrees that the Properties shall be accepted by
the Partnership at each Closing in their then present condition, "as is," with
all faults, if any, and without any warranty whatsoever, express or implied,
except as expressly set forth in this Agreement or in any closing certificate
required pursuant to Section 11.01(c) hereof.

     Section 4.02. Each and every representation and warranty of a Contributor
contained in this Agreement shall be deemed to have been relied upon by the REIT
and the Partnership notwithstanding any investigation, inspection, examination
or the performance of any tests and/or studies the REIT and the Partnership or
its representatives may have made with respect thereto or any information
developed by or made available to the REIT and/or the Partnership prior to any
Closing.

                SECTION 5: MATTERS TO WHICH THE SALE IS SUBJECT

     Section 5.01. Subject to Section 6.02 hereof, the Contributors shall assign
and convey or cause to be assigned and conveyed to the Partnership all of their
right, title and interest in the Existing Owners, which Existing Owners shall
have marketable fee title to the Properties free and clear of any and all
mortgages, liens, leases, encumbrances and easements, EXCEPT:

     (a) All taxes, water meter and water charges and sewer rents, accrued or
unaccrued, fixed or not fixed, becoming due and payable after the Closing Date;

     (b) All zoning laws and building ordinances, resolutions, regulations and
orders of all boards, bureaus, commissions and bodies of any municipal, county,
state or federal government;

     (c) The rights of those parties occupying space at any of the Improvements
pursuant to the Leases described on EXHIBIT B attached hereto;

     (d) The Existing Mortgages; and

     (e) The Permitted Encumbrances.

     Section 5.02. The Partnership and the REIT acknowledge that one of the
Permitted Encumbrances is an approximately $2,200,000 mechanics lien in favor of
Clayco Construction Company. Prior to the Stage I Closing, Robert Morris and
Joseph D. Morris shall deliver an indemnity agreement with respect to such
mechanics lien and certain environmental matters to RMOP and the Title Insurer,
which indemnity agreement shall be substantially in the form of EXHIBIT U
attached (the "MECHANICS LIEN AND ENVIRONMENTAL INDEMNITY").


                                       21
<PAGE>


             SECTION 6: OUTSTANDING INTEREST OR UNMARKETABLE TITLE

     Section 6.01. The Partnership acknowledges receipt of copies of the
existing title insurance policies (collectively, the "TITLE POLICIES") with
respect to the Real Property, all as more particularly described in EXHIBIT D
attached hereto.

     Section 6.02. If, immediately prior to any Closing Date, it should appear
that any Property is affected by any outstanding interest or question of title
which is not permitted by Section 5.01 hereof and such outstanding interest or
question of title is likely to have a Material Adverse Effect, then the
Contributors may adjourn the applicable Closing for a period not exceeding one
(1) month to remove such outstanding interest or question of title so that it
will no longer have a Material Adverse Effect; provided, however, that (i) the
Contributors shall not have the right to remove any outstanding interest or
question of title if the Losses likely to result therefrom exceed $25,000,000
and (ii) in the event the aggregate Loss likely to result from any outstanding
interest or question of title shall exceed $20,000,000 (but shall be less than
$25,000,000), then the Contributors with respect to such Closing may, at their
option, elect to cure any such outstanding interest or question of title, or
reduce the applicable Consideration, such that the aggregate Loss likely to
result therefrom shall not exceed $15,000,000. Notwithstanding the foregoing, if
a judgment against an Existing Owner or monetary lien incurred by an Existing
Owner is recorded or filed against any of the Properties (collectively, the
"UNPERMITTED ENCUMBRANCES"), then the applicable Contributors shall cause the
Existing Owners to discharge such Unpermitted Encumbrances; provided, however,
that in no event shall the applicable Contributors or the applicable Existing
Owners be obligated to expend (i) more than $1,000,000, in the aggregate, with
respect to the Stage I Properties, (ii) more than $3,000,000, in the aggregate,
with respect to the Stage II Properties or (iii) more than $1,000,000, in the
aggregate, with respect to the Stage III Properties, to satisfy such judgments
or liens (unless such lien is a mortgage executed by an Existing Owner, in which
event, the monetary limitations set forth in (i), (ii) and (iii) above shall not
apply and such mortgage shall be satisfied at the applicable Closing without
regard for any such limitations). If after any applicable adjournment, the
Contributors shall be unable to remove such Unpermitted Encumbrances or such
other outstanding interest or question of title to the extent required as set
forth above, the Partnership shall have the right to waive the defect in title
without a reduction in the applicable Consideration or terminate this Agreement
as to Properties for which a Closing shall not have been completed by written
notice to the Contributors whereupon the Downpayment Amount or the Letter of
Credit, as applicable, shall be immediately returned to the Partnership and the
parties shall have no further rights or obligations hereunder.

                             SECTION 7: ADJUSTMENTS

     Section 7.01. A statement of prorations and adjustments shall be prepared
by the applicable Contributors in conformity with the provisions of this
Agreement and submitted to the Partnership for review and approval not less than
three (3) Business Days prior to each respective Closing Date. For purposes of
prorations, the Partnership shall be deemed the owner of the Properties as of
12:01 a.m. on each respective Closing Date. In addition to prorations and


                                       22
<PAGE>


adjustments that may otherwise be provided for in this Agreement, the following
items are to be prorated or adjusted (as the case requires) as of each
respective Closing Date:

     (a) The full amount of the Security Deposits held by the Existing Owners
shall be credited to the Partnership (except with respect to the Tenants listed
on SCHEDULE 14, for which Joseph Morris and Robert Morris shall indemnify the
Partnership pursuant to a Security Deposit Indemnity Agreement in the form of
EXHIBIT T hereto);

     (b) To the extent such charges are not billed directly to the Tenants,
water, electricity, sewer, gas and other utility charges shall be prorated
based, to the extent practicable, on final meter readings and final invoices,
or, if final readings and invoices are not available, based on the most
currently available billing information, and reprorated upon issuance of final
utility billing;

     (c) Amounts paid or payable under any Service Contracts shall be prorated
based, to the extent practicable, on final invoices or, in the event final
invoices are available, based on the most currently available billing
information and reprorated upon issuance of final invoices;

     (d) All Real Estate Taxes shall be prorated on a per diem basis as of each
respective Closing Date, except to the extent they are payable by the Tenants.
If bills for Real Estate Taxes on any Real Property have not been issued as of
the applicable Closing Date and the amount of Real Estate Taxes for the then
current tax fiscal year is not then known, the apportionment of Real Estate
Taxes shall be made at Closing on the basis of the prior fiscal year's Real
Estate Taxes (post Closing adjustments shall be made, as appropriate, between
the Partnership and the Contributors for the Real Estate Taxes as and when such
sums can be precisely determined by the Partnership and the Contributors);

     (e) All assessments, general or special, shall be prorated as of the
applicable Closing Date, except to the extent they are payable by the Tenants,
on a "due date" basis such that the Contributors shall be responsible for any
installments of assessments which are first due or payable prior to such Closing
Date and the Partnership shall be responsible for any installments of
assessments which are first due or payable on or after such Closing Date;

     (f) All Rents and other charges actually received, including, without
limitation, all additional rent, shall be prorated at each Closing. At the
time(s) of final calculation and collection from Tenants of additional rent for
the year in which a Closing occurs, there shall be a re-proration between the
Partnership and the Contributors as to additional rent adjustments, which
re-proration shall be paid upon the Partnership's presentation of its final
accounting to the Contributors, certified as to accuracy by the Partnership. The
parties' respective obligations to reprorate additional rent shall survive each
Closing and shall not merge into any instrument of conveyance delivered at such
Closing. At the Closings, no Rent for the Closing Month shall be prorated unless
such Rent has already been received. If the Partnership discovers at any time
after a Closing that any Tenants prepaid Rent which was not credited to the
Partnership at such Closing as required by this Section, the applicable
Contributors shall pay to the Partnership within a reasonable time after notice
from the Partnership such prepaid rent; provided, the


                                       23
<PAGE>


amount so payable shall not exceed, for each applicable Tenant, prepaid rent for
more than 30 days prior to the applicable Closing. Notwithstanding the
foregoing, the Partnership shall use reasonable efforts after each Closing Date
to collect any delinquent rents due to the Existing Owners from Tenants.
Further, after the Closing Date, the Contributors shall have the right, and the
Partnership hereby grants the applicable Contributors the right, enforceable at
their sole expense, to pursue legal action against any Tenant (and any
guarantors with respect to the applicable Lease) who has defaulted, prior to
such Closing Date, under a Lease (including, without limitation, any right to
pursue legal action against Supreme Warehouse with respect to its lease in the
55 Carter Property); provided, however, that the Contributors shall not have the
right to terminate any Lease (or any right to dispossess any Tenant thereunder).
All Rents and other charges received by the Partnership from any Tenant, after
the applicable Closing Date, shall be applied, (i) first, to the month (the
"CLOSING MONTH") in which the Closing occurs and such Rents shall be prorated
between the parties as set forth above, (ii) second, to the payment to the
Contributors of an amount equal to the sum of (x) delinquent Rents, if any, owed
to, and for the benefit of, the Contributors for the one-month period prior to
the Closing Month and (y) any items of base rent and additional rent (excluding
any extraordinary items of Rent) which are not delinquent as of such Closing
Date, but are allocable to the one (1) month period preceding such Closing (but
in no event shall the aggregate amount of the items set forth in (y) above
exceed $250,000), (iii) third, by the Partnership towards rental obligations
accruing subsequent to the applicable Closing Month and (iv) fourth, to the
payment of any other Rent owed to and for the benefit of, the Contributors
accruing prior to the applicable Closing Month.

     (g) If a new lease (each, a "NEW LEASE") conforming to the Leasing
Guidelines for any vacant space at the Properties (other than vacant space at
the Properties in any Stage II Property which is vacant as of the date hereof)
is executed prior to the applicable Closing with respect to such Property, then
the applicable Contributors (to the extent that such Contributors own equity
interests in the applicable Existing Owners) and the Partnership shall each bear
a pro rata share of the tenant improvement costs and leasing commission
attributable to such New Lease (the "NEW LEASE COSTS"). The Contributors'
proportionate share of the New Lease Costs shall be based on that portion of the
New Lease's initial term commencing on and after the date the Tenant commences
paying rent that elapses prior to the applicable Closing Date, and the
Partnership's proportionate share shall be based on that portion of the New
Lease's initial term commencing on and after the date the Tenant commences
paying rent that remains unexpired as of the applicable Closing Date. The
Contributor shall pay all New Lease Costs and the Partnership shall reimburse
the Contributor for its proportionate share of such New Lease Costs by way of an
adjustment in the Consideration due with respect to such Closing. If this
Agreement is terminated prior to an applicable Closing, then the Partnership
shall have no liability or obligation with respect to any New Lease or any New
Lease Cost relating to such Closing.

     (h) All interest payable on the Existing Mortgages.

     (i) All assessments and other sums paid by any Person and held by an
Existing Owner or payable by an Existing Owner (which assessments and other sums
are not reimbursable by any


                                       24
<PAGE>


Person) pursuant to the terms of any declaration of protective covenants
encumbering any of the Properties.

     (j) To the extent Vescom, Inc. shall have received less than $650,000 in
reimbursements of tenant improvement costs pursuant to its Lease of space at the
5 Henderson Drive Property, the Partnership shall receive a credit, in an amount
equal to such deficiency, at the Stage III Closing.

     (k) In the event one or more of the Stage II Properties shall not have
achieved Stabilization prior to the applicable Stage II Closing Date, the
Partnership shall receive a credit to the applicable Consideration, in an amount
equal to the tenant improvement costs and leasing commissions related to space
which is not leased on both the date hereof and the Stage II Closing Date, as
more particularly set forth on SCHEDULE 30 hereto, together with any other
unpaid tenant improvement costs and leasing commissions; provided, however, that
the Partnership shall be entitled to such credit with respect to any space at 6
Joanna which is occupied on the Stage II Closing Date by Beaulieau of America.

     (l) Those amounts shown on SCHEDULE 33 with respect to brokerage
commissions payable under Leases shall be credited by the applicable
Contributors to the Partnership.

     Section 7.02. For purposes of calculating prorations, the Partnership shall
be deemed to be in title to the Properties, and therefore entitled to the income
therefrom and responsible for the expenses thereof, for the entire Closing Date.
All such prorations shall be made on the basis of the actual number of days of
the year and month that shall have elapsed as of such Closing Date. Any
proration which must be estimated at the applicable Closing Date shall be
reprorated and finally adjusted in accordance with the provisions of this
Section 7.

     Section 7.03. Any adjustments and prorations made at the Stage I Closing
shall be made in cash, Units and/or Preferred Stock to the applicable
Contributors, in such amount, and with respect to such Contributor, in such
proportion and in such type of Consideration (i.e., cash, Units and Preferred
Stock), as is set forth on SCHEDULE 17.1 hereto. Any adjustments and prorations
with respect to the Stage I Properties which are finalized subsequent to the
Stage I Closing shall be made on the earlier of (i) the initial Stage II Closing
or (ii) May 30, 2000 and if such adjustments and prorations are finalized after
the later of such dates, shall be made within ten (10) days after being so
finalized. It is agreed that (x) all net credits to the Contributors arising
from such adjustments and prorations shall be made by the Partnership's and/or
the REIT's, as applicable, delivery of cash, Units and Preferred Stock to the
applicable Contributors, in such amount and, with respect to each such
Contributor, in such proportion and in such type of Consideration (i.e., cash,
Units and Preferred Stock), as was delivered at the Stage I Closing and (y) all
net credits to the Partnership arising from such adjustments and prorations
shall be made in cash; it being expressly understood that as among the
Contributors, the applicable Contributors' rights and obligations with respect
to the same, shall be in proportion to the Consideration received by such
Contributor in connection with the Stage I Closing.


                                       25
<PAGE>


     Section 7.04. Any adjustments and prorations made at any Stage II Closing
shall be made in cash, Units and/or Preferred Stock to the applicable
Contributors, in such amount, and with respect to such Contributor, in such
proportion, and in such type of Consideration (i.e., cash, Units and Preferred
Stock) as is set forth on SCHEDULE 17.2 hereto. Any adjustments and prorations
with respect to the Stage II Properties which are finalized subsequent to the
applicable Stage II Closing shall be made on the earlier of (i) the next Stage
II Closing or, if not applicable, the Stage III Closing or (ii) May 30, 2000 and
if such adjustments and prorations are finalized after the later of such dates,
shall be made within ten (10) days after so finalized. It is agreed that (x) all
net credits to the Contributors arising from such adjustments and prorations
shall be made by the Partnership's and/or the REIT's, as applicable, delivery of
cash, Units and Preferred Stock to the applicable Contributors, in such amount
and, with respect to each such Contributor, in such proportion and in such type
of Consideration (i.e., cash, Units and Preferred Stock), as was delivered at
the applicable Stage II Closing and (y) all net credits to the Partnership
arising from such adjustments and prorations shall be made in cash; it being
expressly understood that as among the Contributors, the applicable
Contributors' obligations with respect to the same, shall be in proportion to
the Consideration received by such Contributor in connection with the Stage II
Closing.

     Section 7.05. Any adjustments and prorations made at the Stage III Closing
shall be made in cash, Units and/or Preferred Stock to ROP, in such amount and
proportion as is set forth on Schedule 17.3 hereto. Any adjustments and
prorations with respect to the Stage III Properties which are finalized
subsequent to the Stage III Closing shall be made on or before August 30, 2000;
and if such adjustments and prorations are finalized after such dates, shall be
made within ten (10) days after so finalized. It is agreed that (x) all net
credits to ROP arising from such adjustments and prorations shall be made by the
Partnership's and/or the REIT's, as applicable, delivery of cash to ROP and (y)
all net credits to the Partnership arising from such adjustments and prorations
shall be made by ROP's delivery of cash to the Partnership.

     Section 7.06. The landlord under the C&I Lease is obligated to make certain
rent payments (the "MIDDLESEX RENTAL PAYMENTS") with respect to certain premises
(the "MIDDLESEX PREMISES") leased by C&I Promotions, Inc. at 2 Middlesex Avenue,
Monroe, New Jersey, as more particularly set forth in the C&I Lease. The parties
hereto agree that (i) ROP will retain the obligation to make the Middlesex
Rental Payments which will be due and payable under the C&I Lease on or
subsequent to the Stage III Closing, and, (ii) in consideration of ROP's
retaining the obligation set forth in clause (i) above, the Partnership hereby
grants to ROP the right to rent, use or otherwise deal with the Middlesex
Premises, which right is more particularly set forth in the C&I Lease; provided,
however, that in the event ROP, upon prior written notice to the Partnership,
shall remit an amount (the "MIDDLESEX PREPAYMENT") equal to the then present
value of the Middlesex Rental Payments (which present value shall be determined
using a discount rate of 11.5%) to the Partnership on or subsequent to the Stage
III Closing Date, then the Partnership, subsequent to its receipt of the
Middlesex Prepayment, shall be obligated to pay the amounts set forth in clause
(i) above and shall receive the rights set forth in (ii) above. This Section
7.06 will survive Closing.



                                       26
<PAGE>


                              SECTION 8: CASUALTY

     Section 8.01. If, on or prior to the applicable Closing Date, any Property
or part thereof shall be destroyed or damaged by fire or other casualty, the
applicable Contributors shall promptly give written notice (a "CASUALTY NOTICE")
thereof to the Partnership and the Partnership shall nevertheless acquire all of
the partnership, membership or other ownership interests in the applicable
Existing Owner, pursuant to all the terms and conditions of this Agreement,
subject to the following: (i) the applicable Contributors shall not permit any
Existing Owner, without the Partnership's prior written approval (which approval
shall not be unreasonably withheld, delayed or conditioned), to (a) adjust and
settle any insurance claims in excess of $750,000 or (b) enter into any
construction or other contract for the repair or restoration of such Property
(unless such contract is for an amount equal to or less than $750,000 and the
amount of insurance proceeds, plus any deductible received as a result of such
casualty is equal to or more than such contract amount) and (ii) at the
applicable Closing, the applicable Contributors shall (1) pay over to the
Partnership the amount of any insurance proceeds, to the extent collected by
such Existing Owner in connection with such casualty, less the amount of the
actual expenses incurred by such Existing Owner in connection with collecting
such proceeds and making any repairs to the Property occasioned by such casualty
pursuant to any contract and (2) assign to the Partnership all of the applicable
Contributors' right, title and interest in and to any insurance proceeds that
are uncollected at the time of such Closing and that may be paid in respect of
such casualty, subject to the payment in full of the applicable Consideration by
the Partnership to such Contributors. The Contributors shall reasonably
cooperate with the Partnership in the collection of such proceeds, which
obligation shall survive the respective Closing for a period of one (1) year. At
the Closing with respect to such Property, the Partnership shall receive a
credit against the Consideration in an amount equal to any deductible(s)
applicable thereto. Notwithstanding anything contained herein to the contrary,
in the event a Substantial Casualty shall have occurred and the Partnership and
the REIT shall desire to terminate this Agreement, the Partnership and the REIT
shall, within ten (10) days of their receipt of a Casualty Notice, so inform the
applicable Contributors in writing (such writing shall be referred to herein as
a "TERMINATION NOTICE"). Thereafter, in the event the applicable Contributors
shall (x) obtain written waivers from one or more Tenants of such Tenants'
rights to terminate their Leases, which waivers do not otherwise modify the
terms of such Tenants' Leases (unless the applicable Contributors shall
reimburse the Partnership for any amounts or credits that may have been given to
such Tenants), such that a Substantial Casualty shall no longer exist and (y)
forward the waivers referred to in (x) above to the Partnership within sixty
(60) days of the applicable Contributors' receipt of such Termination Notice,
the Partnership shall have no right to terminate this Agreement and the
applicable Closing shall take place on the later to occur of (a) the scheduled
Closing Date or (b) such other date as the Partnership shall select, which date
shall be no later than 30 days after the Partnership's receipt of the written
waivers set forth in (x) above; it being expressly understood that in the event
the applicable Contributors shall not have provided the Partnership and the REIT
with the evidence referred to in (x) above within sixty (60) days of the
applicable Contributors' receipt of a Termination Notice, this Agreement shall
be deemed terminated with respect to any Properties for which Closings shall not
yet have occurred, whereupon, subject to Section 26 hereof, the Downpayment
Amount or the Letter of


                                       27
<PAGE>



Credit, as applicable, shall be returned to the Partnership and the parties
hereto shall be released of all obligations and liabilities in connection with
this Agreement with respect to Properties for which Closings shall not yet have
occurred.

                    SECTION 9: CONDEMNATION PENDING CLOSING

     Section 9.01. If, prior to the applicable Closing Date, condemnation or
eminent domain proceedings shall be commenced by any competent public authority
against any Real Property or any part thereof, the applicable Contributors shall
promptly give the Partnership written notice (a "CONDEMNATION NOTICE") thereof.
Thereafter, the Partnership shall acquire all of the partnership, or other
ownership interests in the applicable Existing Owner pursuant to the terms of
this Agreement, whereupon any award payable to such Existing Owner shall be paid
to the Partnership, and the applicable Contributors shall deliver to the
Partnership at the applicable Closing all assignments and other documents
reasonably requested by the Partnership to vest such award in the Partnership.
The applicable Contributors shall not permit any Existing Owner, without the
Partnership's prior written approval (which approval shall not be unreasonably
withheld, delayed or conditioned) to (a) adjust and settle any condemnation
claims in excess of $750,000 or (b) enter into any construction or other
contract for the repair or restoration of such Property (unless such contract is
for an amount equal to or less than $750,000 and the amount of condemnation
proceeds received as a result of such condemnation is equal to or more than such
contract amount). Notwithstanding anything contained herein to the contrary, in
the event that, subsequent to the settlement of one or more condemnation or
eminent domain proceedings, a Substantial Condemnation shall have occurred and
the Partnership and the REIT shall desire to terminate this Agreement, the
Partnership and the REIT shall, within ten (10) days of their receipt of a
Condemnation Notice, deliver a Termination Notice to the applicable
Contributors. Thereafter, in the event the applicable Contributors shall (x)
obtain written waivers from one or more Tenants of such Tenants' rights to
terminate their Leases, which waivers do not otherwise modify the terms of such
Tenants' Leases (unless the applicable Contributors shall reimburse the
Partnership for any amounts or credits that may have been given to such
Tenants), such that a Substantial Condemnation shall no longer exist and (y)
forward the waivers referred to in (x) above to the Partnership within sixty
(60) days of the applicable Contributors' receipt of such Termination Notice,
the Partnership shall have no right to terminate this Agreement and the
applicable Closing shall take place on the later to occur of (a) the scheduled
Closing Date or (b) such other date as the Partnership shall select, which date
shall be no later than 30 days after the Partnership's receipt of the written
waivers set forth in (x) above; it being expressly understood that in the event
the applicable Contributors shall not have provided the Partnership and the REIT
with the evidence referred to in (x) above within sixty (60) days of the
applicable Contributors' receipt of a Termination Notice, this Agreement shall
be deemed terminated with respect to any Properties for which Closings shall not
yet have occurred, whereupon, subject to Section 26 hereof, the Downpayment
Amount or the Letter of Credit, as applicable, shall be returned to the
Partnership and the parties hereto shall be released of all obligations and
liabilities in connection with this Agreement with respect to Properties for
which Closings shall not yet have occurred.

                                       28
<PAGE>


          SECTION 10: THE CONTRIBUTORS' REPRESENTATIONS AND WARRANTIES

     To induce the Partnership to enter into this Agreement and to accept the
Contributors' interest in the Existing Owners from the Contributors, the
applicable Contributors make the following representations and warranties, all
of which the Contributors represent are true in all material respects as of the
date hereof and shall be true in all material respects as of each Closing Date
and shall be deemed remade as of that date:

     Section 10.01. (a) The RMOP Contributors jointly and severally represent
that RMOP is the fee owner of the Stage I Properties, subject only to the items
permitted by Section 5 hereof.

     (b) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that, at the Stage I Closing, the RMOP Subs will be the fee owners of
the Stage II Properties, subject only to the items permitted by Section 5
hereof.

     (c) ROP represents that, at the Stage III Closing, a Subsidiary of ROP will
be the fee owner of the Stage III Properties, subject only to the items
permitted by Section 5 hereof and subject to Section 3.01(e).

     Section 10.02. (a) The Morris Contributors jointly and severally represent
that, the execution, delivery and performance of this Agreement and the
consummation of the transactions contemplated under the Agreement do not
conflict with or constitute a breach of, or default under, or result in the
creation or imposition of any lien, charge or encumbrance upon any assets,
properties or operations of the RMOP Contributors (other than RMIT), RMOP or any
RMOP Sub (or any of such Persons' Subsidiaries) pursuant to, any contract,
indenture, mortgage, note, deed of trust, loan or credit agreement, note, lease
or other agreement or instrument to which such Persons are parties or by which
such Persons may be bound, or to which any of such Persons properties or assets
may be bound or subject, nor will such action result in any violation of the
provisions of the Organizational Documents of the RMOP Contributors (other than
RMIT), RMOP or any RMOP Sub or any applicable law, statute, rule, regulation,
judgment, order, writ or decree of any government, government instrumentality or
court, domestic or foreign, having jurisdiction over the RMOP Contributors
(other than RMIT), RMOP, or any RMOP Sub or any of such Person's properties or
assets.

     (b) RMIT represents that, the execution, delivery and performance of this
Agreement and the consummation of the transactions contemplated under the
Agreement do not conflict with or constitute a breach of, or default under, or
result in the creation or imposition of any lien, charge or encumbrance upon any
assets, properties or operations of RMOP, RMIT, RMIIGP, any RMOP Sub (or any of
such Persons' Subsidiaries) pursuant to any contract, indenture, mortgage, deed
of trust, loan or credit agreement, note, lease or other agreement or instrument
to which such Persons are parties or by which such Persons may be bound, or to
which any of such Persons properties or assets may be bound or subject, nor will
such action result in any violation of the provisions of the organizational
documents of RMOP, RMIT, RMIIGP, any RMOP Sub, or any applicable law, statute,
rule, regulation, judgment, order, writ or decree of any


                                       29
<PAGE>


government, government instrumentality or court, domestic or foreign, having
jurisdiction over RMOP, RMIT, RMIIGP or any RMOP Sub or any of such Person's
properties or assets.

     (c) ROP represents that, the execution, delivery and performance of this
Agreement and the consummation of the transactions contemplated under the
Agreement do not conflict with or constitute a breach of, or default under, or
result in the creation or imposition of any lien, charge or encumbrance upon any
assets, properties or operations of ROP, any ROP Sub or any Subsidiary pursuant
to, any contract, indenture, mortgage, deed of trust, loan or credit agreement,
note, lease or other agreement or instrument to which such Person is a party or
by which such Person may be bound, or to which such Person's properties or
assets may be bound or subject, nor will such action result in any violation of
the provisions of the organizational documents of ROP, any ROP Sub or any
applicable law, statute, rule, regulation, judgment, order, writ or decree of
any government, government instrumentality or court, domestic or foreign, having
jurisdiction over ROP, any ROP Sub or such Person's properties or assets.

     (d) RMIIGP represents that, the execution, delivery and performance of this
Agreement and the consummation of the transactions contemplated under the
Agreement do not conflict with or constitute a breach of, or default under, or
result in the creation or imposition of any lien, charge or encumbrance upon any
assets, properties or operations of RMOP or RMIIGP pursuant to any contract,
indenture, mortgage, deed of trust, loan or credit agreement, note, lease or
other agreement or instrument to which such Persons are parties or by which such
Persons may be bound, or to which any of such Persons' properties or assets may
be bound or subject, nor will such action result in any violation of the
provisions of the organizational documents of RMOP or RMIIGP or any applicable
law, statute, rule, regulation, judgment, order, writ or decree of any
government, government instrumentality or court, domestic or foreign, having
jurisdiction over RMOP or RMIIGP or any of such Persons' properties or assets.

     Section 10.03. (a) The RMOP Contributors jointly and severally represent
that, except as set forth on SCHEDULE 6 attached, neither RMOP, any of the RMOP
Subs, nor any RMOP Contributor has received written notice, and neither RMOP,
any of the RMOP Subs, nor any RMOP Contributor has actual knowledge of (i) any
violation of any applicable federal, state or local law (including, without
limitation, any zoning laws or building codes) with respect to the Stage I
Properties or the Stage II Properties or (ii) any pending or threatened appeals,
revocations or suspensions of any permits, approvals or consents, relating to
the current use or proposed use of the Stage I Properties or the Stage II
Properties.

     (b) ROP represents that, except as set forth on SCHEDULE 6 attached,
neither ROP nor any ROP Sub has received written notice, and neither ROP nor any
ROP Sub has actual knowledge of (i) any violation of any applicable federal,
state or local law (including, without limitation, any zoning laws or building
codes) with respect to the Stage III Properties or (ii) any pending or
threatened appeals, revocations or suspensions of any permits, approvals or
consents, relating to the current use or proposed use of the Stage III
Properties.



                                       30
<PAGE>


     Section 10.04. (a) Except as set forth on SCHEDULE 7 attached, the RMOP
Contributors jointly and severally represent that there are no existing or
pending claims, condemnations or sales in lieu thereof with respect to any
aspect of any of the Stage I Properties or Stage II Properties nor any actions,
suits, condemnations, proceedings or claims been threatened or asserted.

     (b) Except as set forth on SCHEDULE 7 attached, ROP represents that there
are no existing or pending claims, condemnations or sales in lieu thereof with
respect to any aspect of any of the Stage III Properties nor any actions, suits,
condemnations, proceedings or claims been threatened or asserted.

     Section 10.05. (a) The RMOP Contributors jointly and severally represent
that, except as set forth on SCHEDULE 26 hereto, there is no civil, criminal or
administrative action, suit, demand, claim, hearing, notice of violation,
investigation or proceeding with respect to the Stage I Properties or the Stage
II Properties, pending, or to the RMOP Contributors' knowledge, threatened
against or affecting the RMOP Contributors, RMOP, the RMOP Subs or any portion
of the Stage I Properties or the Stage II Properties relating in any way to the
Environmental Laws or any regulation, code, plan, order, decree, judgment,
injunction, notice or demand letter issued, entered, promulgated or approved
thereunder.

     (b) ROP represents that, except as set forth on SCHEDULE 26 hereto, there
is no civil, criminal or administrative action, suit, demand, claim, hearing,
notice of violation, investigation or proceeding with respect to the Stage III
Properties, pending, or to ROP's knowledge, threatened, against or affecting the
ROP Subs or any portion of the Stage III Properties relating in any way to the
Environmental Laws or any regulation, code, plan, order, decree, judgment,
injunction, notice or demand letter issued, entered, promulgated or approved
thereunder.

     Section 10.06. (a) The RMOP Contributors jointly and severally represent
that, except as set forth on SCHEDULE 27 hereto, neither RMOP, any RMOP Sub nor
any RMOP Contributor has, and to RMOP's, the RMOP Subs' and the RMOP
Contributors' knowledge, no other party has released, buried or dumped any
hazardous substances, oils, pollutants or contaminants or any other wastes
produced by, or resulting from, any business, commercial, or industrial
activities, operations or processes on, beneath or adjacent to any portion of
the Stage I Properties or the Stage II Properties, except (i) in accordance with
applicable laws and regulations or (ii) in a manner such that there has been no
release of any such substance into the environment.

     (b) ROP represents that, except as set forth on SCHEDULE 27 hereto, no ROP
Sub has and to ROP's and the ROP Subs' knowledge, no other party has released,
buried or dumped any hazardous substances, oils, pollutants or contaminants or
any other wastes produced by, or resulting from, any business, commercial, or
industrial activities, operations or processes on, beneath or adjacent to any
portion of the Stage III Properties, except (i) in accordance with applicable
laws and regulations or (ii) in a manner such that there has been no release of
any such substance into the environment.


                                       31
<PAGE>


     Section 10.07. (a) The RMOP Contributors jointly and severally represent
that (i) except as set forth on SCHEDULE 21 attached hereto, no Tenant in a
Stage I Property or a Stage II Property is in default with respect to, or in
arrears (for more than 30 days) in the payment of, any base rent or additional
rent required of such Tenant under its Lease and, to the actual knowledge of the
RMOP Contributors, there is no material non-monetary default under any Lease
relating to a Stage I Property or a Stage II Property; (ii) no Tenant in a Stage
I Property or a Stage II Property has informed RMOP of a landlord default under
such Lease; (iii) no Tenant has prepaid rent in excess of one month in advance
or, to the RMOP Contributor's knowledge, is the subject of bankruptcy
proceedings (except MBI Merchandising); (iv) each of the Leases set forth on
EXHIBIT B attached hereto is in full force and effect; (v) except as set forth
in the Leases, following Closing, the Partnership will have no obligation to pay
rent or satisfy any other obligation of any Tenant for space in any other
building, or to purchase any Tenant's leasehold estate in any other building, or
to contribute to any Tenant for unfinished tenant leasehold improvements; (vi)
except as set forth in the Leases, no Tenant is entitled to any free rent,
concession, rebate, refund or other unfilled landlord inducement; (vii) SCHEDULE
10 is a true and correct list of all Security Deposits currently being held by
RMOP and the RMOP Subs; and (viii) no Existing Owner, nor to the RMOP
Contributors' knowledge, any other party is in default under the terms of such
Service Contracts.

     (b) ROP represents that (i) except as set forth on SCHEDULE 21 attached
hereto, no Tenant in a Stage III Property is in default with respect to, or is
in arrears (for more than 30 days) in the payment of, any base rent or
additional rent required of such Tenant under its Lease and, to ROP's actual
knowledge, there is no material non-monetary default under any Lease relating to
a Stage III Property; (ii) no Tenant in a Stage III Property has informed any
ROP Sub of a landlord default under such Lease; (iii) no Tenant has prepaid rent
in excess of one month in advance or, to the best of ROP's knowledge, is the
subject of bankruptcy proceedings; (iv) each of the Leases set forth on EXHIBIT
B attached hereto is in full force and effect; (v) except as set forth in the
Leases, following Closing, the Partnership will have no obligation to pay rent
or satisfy any other obligation of any Tenant for space in any other building,
or to purchase any Tenant's leasehold estate in any other building, or to
contribute to any Tenant for unfinished tenant leasehold improvements; (vi)
except as set forth in the Leases, no Tenant is entitled to any free rent,
concession, rebate, refund or other unfilled landlord inducement; (vii) SCHEDULE
10 is a true and correct list of all Security Deposits currently being held by
the ROP Subs; and (viii) no ROP Sub, nor to ROP's knowledge, any other party is
in default under the terms of such Service Contracts.

     Section 10.08. (a) Each Contributor represents that such Contributor is not
a "foreign person" as defined in Section 1445 of the Code and the income tax
regulations thereunder.

     (b) The RMOP Contributors jointly and severally represent and warrant that
RMOP is not a "foreign person" as defined in Section 1445 of the Code and the
income tax regulations thereunder.


                                       32
<PAGE>


     (c) The RMOP Contributors (other than RMIIGP) jointly and severally
represent and warrant that no RMOP Sub is a "foreign person" as defined in
Section 1445 of the Code and the income tax regulations thereunder.

     (d) ROP represents and warrants that no ROP Sub is a "foreign person" as
defined in Section 1445 of the Code and the income tax regulations thereunder.

     Section 10.09. (a) ROP and RMIT jointly and severally represent that (i)
RMIT has been duly organized and is validly existing as a real estate investment
trust in good standing under the laws of the State of Maryland and has the power
and authority to own, lease and operate its properties, to conduct the business
in which it is engaged, to enter into, execute and deliver this Agreement and
the other documents to be delivered by it at the applicable Closings and to
consummate the transactions contemplated under the Agreement and the other
documents to be delivered by it at the applicable Closings and (ii) ROP has been
duly organized and is validly existing as a limited partnership in good standing
under the laws of the State of Delaware and has the power and authority to own,
lease and operate its properties, to conduct the business in which it is
engaged, to enter into, execute and deliver this Agreement and the other
documents to be delivered by it at the applicable Closings and to consummate the
transactions contemplated under the Agreement and the other documents to be
delivered by it at the applicable Closings.

     (b) ROP and RMIT jointly and severally represent that no filing with, or
authorization, approval, consent, license, order, registration, qualification or
decree of, any court or Governmental or Regulatory Authority or agency or any
other entity or person is necessary or required for the consummation by RMIT or
ROP of the transactions contemplated under the Agreement and the other documents
to be delivered by it at the applicable Closings, except such as have been
already obtained and except as disclosed in Section 3.01(e) hereof.

     (c) ROP and RMIT jointly and severally represent that neither ROP nor RMIT
is an "investment company" within the meaning of the Investment Company Act of
1940, as amended

     Section 10.10. (a) The Morris Contributors jointly and severally represent
that (i) the Morris Trusts have been duly organized and are validly existing
under the laws of the State of New Jersey and have the power and authority to
own and manage their properties, to conduct the business in which they are
engaged, to enter into, execute and deliver this Agreement and the other
documents to be delivered by it at the applicable Closings and to consummate the
transactions contemplated under the Agreement and the other documents to be
delivered by it at the applicable Closings; (ii) the Morris Partnerships have
been duly organized and are validly existing as a limited partnership in good
standing under the laws of the State of New Jersey and have the power and
authority to own, and manage their properties, to conduct the business in which
they are engaged, to enter into, execute and deliver this Agreement and the
other documents to be delivered by it at the applicable Closings and to
consummate the transactions contemplated under the Agreement and the other
documents to be delivered by it at the applicable Closings and (iii) the Morris
Contributors (other than the Morris Partnerships and the Morris Trusts) have the
power and authority to own and manage their properties, to conduct the



                                       33
<PAGE>



businesses in which they are engaged, to enter into, execute and deliver this
Agreement and the other documents to be delivered by such Persons at the
applicable Closings and to consummate the transactions contemplated under this
Agreement and the other documents to be delivered by it at the applicable
Closings.

     (b) The Morris Contributors jointly and severally represent that no filing
with, or authorization, approval, consent, license, order, registration,
qualification or decree of, any court or governmental authority or agency or any
other entity or person is necessary or required for the consummation by the
Morris Contributors of the transactions contemplated under the Agreement and the
other documents to be delivered by such Persons at the applicable Closings,
except such as have been already obtained.

     (c) The Morris Contributors jointly and severally represent that no Morris
Contributor is an "investment company" within the meaning of the Investment
Company Act of 1940, as amended.

     Section 10.11. The RMOP Contributors jointly and severally represent and
warrant the following:

     (a) RMOP is duly organized and validly existing as a limited partnership in
good standing under the laws of the State of Delaware, with all partnership
power and authority to own, lease and operate its properties and to conduct the
business in which it is engaged.

     (b) The financial information with respect to RMOP which has been furnished
to the Partnership (including, without limitation, aged receivables and profit
and loss statements) with respect to the period commencing on January 6, 1998,
fairly presents the financial position of RMOP at the respective dates indicated
and has been prepared on an accrual basis.

     (c) RMOP is not in violation of its (i) certificate of limited partnership
or partnership agreement or (ii) in default in the performance or observance of
any obligation, agreement, covenant or condition contained in any contract,
indenture, mortgage, deed of trust, loan or credit agreement, note, lease or
other agreement or instrument to which it is a party or by which it may be
bound, or to which any of its properties or assets may be bound or subject.

     (d) There is no action, suit, proceedings, inquiry or investigation before
or by any court or Governmental or Regulatory Authority, now pending or, to the
knowledge of RMOP, or any RMOP Contributor threatened against or affecting RMOP
or any of its properties or assets.

     (e) RMOP is not an "investment company" within the meaning of the
Investment Company Act of 1940, as amended.

     (f) RMIIGP has been duly organized and is validly existing as a limited
liability company in good standing under the laws of the State of Delaware and
has the power and authority to own and operate its properties, to conduct the
business in which it is engaged, to enter into, execute and deliver this
Agreement and the other documents to be delivered by it at


                                       34
<PAGE>


the Stage I Closing and to consummate the transactions contemplated under the
Agreement and the other documents to be delivered by it at the Stage I Closing.

     (g) No filing with, or authorization, approval, consent, license, order,
registration, qualification or decree of, any court or governmental authority or
agency or any other entity or person is necessary or required for the
consummation by RMIIGP of the transactions contemplated under this Agreement and
the other documents to be delivered by it at the Stage I Closing, except such as
have been already obtained.

     (h) RMIIGP is not an "investment company" within the meaning of the
Investment Company Act of 1940, as amended.

     Section 10.12. (a) The RMOP Contributors jointly and severally represent
that (i) RMOP has prepared and timely filed all tax returns required to be filed
by it on or before the date hereof, including tax returns with respect to the
Stage I Properties, which tax returns are true, correct and complete in all
material respects; (ii) RMOP has paid or made provisions for the payment of all
taxes that are due or claimed to be due from it on or before the date hereof by
any governmental taxing authority; (iii) no federal, state, local or foreign
taxing authority has asserted any tax, lien, interest, penalty or other
assessment against the Stage I Properties or RMOP which has not been paid; (iv)
there is no pending audit or inquiry from any federal, state or local tax
authority relating to the Stage I Properties or RMOP that may be expected to
result in a tax deficiency, lien, interest, penalty or other assessment against
the Stage I Properties or RMOP and (v) RMOP was organized and has at all times
been classified as a partnership for federal income tax purposes and for
applicable state income tax purposes and not as a corporation or an association
taxable as a corporation.

     (b) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that (i) the RMOP Subs have prepared and timely filed all tax returns
required to be filed by them on or before the date hereof including any tax
returns with respect to the Stage II Properties, which tax returns are true,
correct and complete in all material respects; (ii) the RMOP Subs have paid or
made provisions for the payment of all taxes that are due or claimed to be due
from them on or before the date hereof by any governmental taxing authority;
(iii) no federal, state, local or foreign taxing authority has asserted any tax,
lien, interest, penalty or other assessment against the Stage II Properties or
any RMOP Sub which has not been paid; (iv) there is no pending audit or inquiry
from any federal state or local tax authority relating to the Stage II Property
or any RMOP Sub that may be expected to result in a tax deficiency, lien,
interest, penalty or other assessment against the Stage II Properties or any
RMOP Subs and (v) each RMOP Sub was organized and at all times has been
classified as either a partnership or a disregarded entity for federal income
tax purposes and for applicable state income tax purposes and not as a
corporation or an association taxable as a corporation.

     (c) ROP represents that (i) the ROP Subs have prepared and timely filed or
have been included in all tax returns required to be filed by them or ROP on or
before the date hereof, including any tax returns with respect to the Stage III
Properties, which tax returns are true,


                                       35
<PAGE>


correct and complete in all material respects; (ii) the ROP Subs or ROP has paid
or made provisions for the payment of all taxes that are due or claimed to be
due from them on or before the date hereof by any governmental taxing authority;
(iii) no federal, state, local or foreign taxing authority has asserted any tax,
lien, interest, penalty or other assessment against the Stage III Properties or
the ROP Subs which has not been paid; (iv) there is no pending audit or inquiry
from any federal, state or local tax authority relating to the Stage III
Properties or the ROP Subs that may be expected to result in a tax deficiency,
lien interest, penalty or other assessment against the Stage III Properties or
the ROP Subs; (v) each ROP Sub was organized and has at all times been
classified as a partnership or a disregarded entity for federal income tax
purposes and for applicable state income tax purposes and not as a corporation
or an association taxable as a corporation; and (vi) at least 95% of the gross
income generated by the Stage III Properties is, based on current operations and
without regard for future operations, from sources described in Section
856(c)(3) of the Code and at least 80% of the assets held by the ROP Subs are
assets described in Section 856(c)(4)(A) of the Code.

     (d) The Morris Contributors jointly and severally represent that (i) at
least 95% of the gross income generated by the Stage I Properties is, based on
current operations and without regard for future operations, from sources
described in Section 856(c)(3) of the Code and at least 80% of the assets held
by RMOP are assets described in Section 856(c)(4)(A) of the Code and (ii) at
least 95% of the gross income generated by the Stage II Properties are, based on
current operations and without regard for future operations, from sources
described in Section 856(c)(3) of the Code and at least 80% of the assets held
by the RMOP Subs are assets described in Section 856(c)(4)(A) of the Code.

     Section 10.13. The Contributors jointly and severally represent that the
schedule of insurance policies to be set forth on SCHEDULE 22 attached is true,
complete and correct in all material respects, all such policies are in full
force and effect and no Existing Owner is in default with respect to any
material provisions contained in any such policy; neither any Existing Owner,
nor, to the best of each Contributor's knowledge, any agent of any Existing
Owner, has received from any insurer any notice with respect to any defects or
inadequacies affecting all or any part of the Properties, any notice of
cancellation or non-renewal of any such policy, or any notice that any insurance
premiums will be materially increased in the future or that any insurance
coverage under such policies will not be available in the future on
substantially the same terms as now in effect.

     Section 10.14. (a)The RMOP Contributors jointly and severally represent
that (i) the Contracts which relate to the Stage I Properties comprise every
contract, agreement, relationship and commitment, oral or written (other than
the Leases and the Permitted Encumbrances) that affect the Stage I Properties
and to which RMOP is a party or by which it is bound, including, without
limitation, all agreements relating to the management, construction, operation,
maintenance or repair of any Stage I Property, the purchase of materials,
supplies, equipment, machinery parts, products and services, and the lease of
any equipment or personal property, (ii) the Contracts which relate to the Stage
I Properties are in full force and effect and have not been modified, amended or
altered, in writing or otherwise and (iii) neither RMOP, nor, to the


                                       36
<PAGE>


knowledge of the RMOP Contributors, any other party is in default under the
terms of any Contract which relates to any of the Stage I Properties. Except as
otherwise noted on SCHEDULE 23 attached, each Service Contract relating to the
Stage I Properties is cancelable by Existing Owner (or its assignees or
successors) without payment of any penalty upon not more than thirty (30) days
prior notice. Except as otherwise noted on SCHEDULE 23 attached, no Service
Contract is with an affiliate of RMOP or an RMOP Contributor.

     (b) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that (i) the Contracts which relate to the Stage II Properties
comprise every contract, agreement, relationship and commitment, oral or written
(other than the Leases and the Permitted Encumbrances) that affect the Stage II
Properties and to which any RMOP Sub is a party or by which such Person may be
bound, including, without limitation, all agreements relating to the management,
construction, operation, maintenance or repair of any Stage II Property, the
purchase of materials, supplies, equipment, machinery parts, products and
services, and the lease of any equipment or personal property, (ii) the
Contracts which relate to the Stage II Properties are in full force and effect
and have not been modified, amended or altered, in writing or otherwise and
(iii) no RMOP Sub, nor, to the knowledge of the RMOP Contributors (other than
RMIIGP), any other party is in default under the terms of any Contract which
relates to any of the Stage II Properties. Except as otherwise noted on SCHEDULE
23 attached, each Service Contract relating to the Stage II Properties is
cancelable by the applicable RMOP Sub (or its assignees or successors) without
payment of any penalty upon not more than thirty (30) days prior notice. Except
as otherwise noted on SCHEDULE 23 attached, no Service Contract is with an
affiliate of an RMOP Sub or an RMOP Contributor.

     (c) ROP represent that (i) the Contracts which relate to the Stage III
Properties comprise every contract, agreement, relationship and commitment, oral
or written (other than the Leases the Permitted Encumbrances) that affect the
Stage III Properties and to which any ROP Sub is a party or by which it is
bound, including, without limitation, all agreements relating to the management,
construction, operation, maintenance or repair of any Stage III Property, the
purchase of materials, supplies, equipment, machinery parts, products and
services, and the lease of any equipment or personal property, (ii) the
Contracts which relate to the Stage III Properties are in full force and effect
and have not been modified, amended or altered, in writing or otherwise and
(iii) no ROP Sub, nor, to ROP's knowledge, any other party is in default under
the terms of any Contract which relates to any of the Stage III Properties.
Except as otherwise noted on SCHEDULE 23 attached, each Service Contract
relating to the Stage III Properties is cancelable by the applicable ROP Sub (or
its assignees or successors) without payment of any penalty upon not more than
thirty (30) days prior notice. Except as otherwise noted on SCHEDULE 23
attached, no Service Contract is with an affiliate of ROP.

     Section 10.15. (a) The Contributors individually represent, with respect to
themselves, that none of them have made a general assignment for the benefit of
creditors, filed any voluntary petition in bankruptcy or suffered the filing of
any involuntary petition by any of their creditors, suffered the appointment of
a receiver to take possession of all, or substantially all, of


                                       37
<PAGE>


any of their assets, suffered the attachment or other judicial seizure of all,
or substantially all, of any of their assets, admitted in writing their
inability to pay their debts as they come due or made an offer of settlement,
extension or composition to their creditors generally.

     (b) The RMOP Contributors jointly and severally represent that RMOP has not
made a general assignment for the benefit of creditors, filed any voluntary
petition in bankruptcy or suffered the filing of any involuntary petition by any
of its creditors, suffered the appointment of a receiver to take possession of
all, or substantially all, of any of its assets, suffered the attachment or
other judicial seizure of all, or substantially all, of any of its assets,
admitted in writing its inability to pay its debts as they come due or made an
offer of settlement, extension or composition to its creditors generally.

     (c) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that no RMOP Sub has made a general assignment for the benefit of
creditors, filed any voluntary petition in bankruptcy or suffered the filing of
any involuntary petition by any of its creditors, suffered the appointment of a
receiver to take possession of all, or substantially all, of any of its assets,
suffered the attachment or other judicial seizure of all, or substantially all,
of any of its assets, admitted in writing its inability to pay its debts as they
come due or made an offer of settlement, extension or composition to its
creditors generally.

     (d) ROP represents that no ROP Sub has made a general assignment for the
benefit of creditors, filed any voluntary petition in bankruptcy or suffered the
filing of any involuntary petition by any of its creditors, suffered the
appointment of a receiver to take possession of all, or substantially all, of
any of its assets, suffered the attachment or other judicial seizure of all, or
substantially all, of any of its assets, admitted in writing its inability to
pay its debts as they come due or made an offer of settlement, extension or
composition to its creditors generally.

     Section 10.16. (a) The RMOP Contributors jointly and severally represent
that the financial information regarding the Stage I Properties furnished by the
RMOP Contributors and RMOP to the Partnership fairly presents the results of the
operations of the Stage I Properties for the periods covered.

     (b) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that the financial information regarding the Stage II Properties
furnished by the RMOP Contributors to the Partnership fairly presents the
results of the operations of the Stage II Properties for the periods covered.

     (c) ROP represents that the financial information regarding the Stage III
Properties furnished by ROP to the Partnership fairly presents the results of
the operations of the Stage III Properties for the periods covered.

     Section 10.17. (a) The RMOP Contributors jointly and severally represent
that (i) each mortgagor under the Existing Mortgages encumbering the Stage I
Properties is current in the payment of (and, at all times prior to the Closing,
shall pay, when and as due), all sums due under, and is not in default beyond
any applicable notice and grace periods under, the Existing Mortgages
encumbering the Stage I Properties, (ii) the Existing Mortgages encumbering the


                                       38
<PAGE>


Stage I Properties are in full force and effect, and (iii) the principal amount
outstanding under Existing Mortgages with respect to the Stage I Properties
shall not exceed, in the aggregate, $16.4 million, on the Stage I Closing Date.

     (b) The RMOP Contributors (other than RMIIGP) jointly and severally
represent that (i) each mortgagor under the Existing Mortgages encumbering the
Stage II Properties is current in the payment of (and, at all times prior to the
Closing, shall pay, when and as due), all sums due under the Existing Mortgages
encumbering the Stage II Properties, (ii) the Existing Mortgages encumbering the
Stage II Properties are in full force and effect, and no RMOP Sub or RMOP
Contributor has received any notice of a default thereunder that remains
outstanding and (iii) the principal amount outstanding under Existing Mortgages
with respect to the Stage II Properties shall not exceed, in the aggregate, the
cash and assumed indebtedness portions of the applicable Stage II Consideration.

     (c) ROP represents that there are no Existing Mortgages encumbering the
Stage III Properties.

     Section 10.18. (a) The Contributors jointly and severally represent that,
except as otherwise set forth herein, at the applicable Closing, (i) the only
assets of the Existing Owners will be the Properties, (ii) the only loans to the
Existing Owners will be the Existing Mortgages and (iii) there are no
non-property related liabilities except those incurred in the ordinary course of
business.

     (b) The RMOP Contributors jointly and severally represent that (i) EXHIBIT
B attached contains a true and complete listing of all Leases with respect to
the Stage I Properties and the Stage II Properties as of the date of this
Agreement; (ii) SCHEDULE 16 attached contains a true and complete listing of all
Service Contracts affecting the Stage I Properties and the Stage II Properties
as of the date of this Agreement; (iii) except with respect to the Brokerage
Agreements listed on SCHEDULE 24 hereto, no brokerage or leasing commissions or
other compensation is or will be due or payable to any party (each, a "LEASE
BROKER") with respect to, or on account of, the current term of any of the
Leases with respect to the Stage I Properties and the Stage II Properties; and
(iv) SCHEDULE 5 attached contains a complete listing of all Purchase Options and
purchase agreements to which RMOP or any RMOP Sub is a party.

     (c) ROP represents that (i) EXHIBIT B attached contains a true and complete
listing of all Leases with respect to the Stage III Properties as of the date of
this Agreement; (ii) SCHEDULE 16 attached contains a true and complete listing
of all Service Contracts affecting the Stage III Properties as of the date of
this Agreement; and (iii) except with respect to the Brokerage Agreements listed
on SCHEDULE 24 hereto, no brokerage or leasing commissions or other compensation
is or will be due or payable to any Lease Broker with respect to, or on account
of, the current term of any of the Leases with respect to the Stage III
Properties.

     Section 10.19. The RMOP Contributors (other than RMIIGP) jointly and
severally represent and warrant the following with respect to the RMOP Subs:


                                       39
<PAGE>


     (a) Each of the RMOP Subs is duly organized and validly existing as a
limited liability company in good standing under the laws of the State of
Delaware, with all partnership power and authority to own, lease and operate its
properties and to conduct the business in which it is engaged.

     (b) No RMOP Sub is in violation of its certificate of formation or
operating agreement or is in default beyond any applicable notice and cure
periods in the performance or observance of any obligation, agreement, covenant
or condition contained in any contract, indenture, mortgage, deed of trust, loan
or credit agreement, note, lease or other agreement or instrument to which it is
a party or by which it may be bound, or to which any of its properties or assets
may be bound or subject.


     (c) There is no action, suit, proceedings, inquiry or investigation before
or by any court or Governmental or Regulatory Authority, domestic or foreign,
now pending or, to the best of any such RMOP Contributor's knowledge, threatened
against, or affecting, any of the RMOP Subs or any of their properties or
assets.

     (d) No RMOP Sub is an "investment company" within the meaning of the
Investment Company Act of 1940, as amended.

     Section 10.20. ROP represents and warrants the following with respect to
the ROP Subs:

     (a) Each of the ROP Subs is duly organized and validly existing as a
limited liability company in good standing under the laws of the state where it
was formed, with all power and authority necessary to own, lease and operate its
properties and to conduct the business in which it is engaged.

     (b) No ROP Sub is in violation of its certificate of formation or operating
agreement or is in default beyond any applicable notice and cure periods in the
performance or observance of any obligation, agreement, covenant or condition
contained in any contract, indenture, mortgage, deed of trust, loan or credit
agreement, note, lease or other agreement or instrument to which it is a party
or by which it may be bound, or to which any of its properties or assets may be
bound or subject.

     (c) There is no action, suit, proceedings, inquiry or investigation before
or by any court or Governmental or Regulatory Authority, domestic or foreign,
now pending or, to the best of ROP's Contributor's knowledge, threatened
against, or affecting, any of the ROP Subs or any of their properties or assets.

     (d) No ROP Sub is an "investment company" within the meaning of the
Investment Company Act of 1940, as amended.

     Section 10.21. (a) The RMOP Contributors represent and warrant that (i)
except as set forth on SCHEDULE 31 hereof, neither RMOP nor any RMOP Sub has any
Company Plans; (ii) each such Company Plan is, to the extent applicable, a
Compliant Plan; (iii) no event has


                                       40
<PAGE>


occurred and no condition exists, with respect to any such Plan, that has
subjected or could reasonably be expected to subject RMOP or any RMOP Sub or any
Company Plan or any successor thereto, to any tax, fine, penalty or other
liability (other than, in the case of RMOP and/or any RMOP Sub and such Company
Plans, a liability arising in the normal course to make contributions or
payments, as applicable, when ordinarily due under a Company Plan with respect
to employees of such Persons); (iv) no event has occurred and no condition
exists, with respect to any Plan, that could reasonably be expected to subject
the Partnership or any of its Affiliates, or any Plan maintained by the
Partnership or any Affiliate (other than an affiliate which becomes such
pursuant to the transactions contemplated by this Agreement) thereof, to any
tax, fine, penalty or other liability, that would not have been incurred by the
Partnership or any of its affiliates, or any such Plan, but for the transactions
contemplated hereby; (v) no Plan exists which could result in the payment of
money or any other property or rights, or accelerate or provide any other rights
or benefits, to any current or former employee of RMOP or any RMOP Sub (or other
current or former service provider thereto) that would not have been required
but for the transactions provided for herein; and (vi) neither RMOP nor any RMOP
Sub, nor any of their respective Affiliates, is a party to any Plan, program,
arrangement or understanding that would result, separately or in the aggregate,
result in the payment (whether in connection with any termination of employment
or otherwise) of any "excess parachute payment" within the meaning of Section
280G of the Code with respect to a current or former employee of, or current or
former independent contractor to, such Person.

     (b) ROP represents and warrants that (i) except as set forth on SCHEDULE 31
hereof, no ROP Sub has any Company Plans; (ii) each such Company Plan is, to the
extent applicable, a Compliant Plan; (iii) no event has occurred and no
condition exists, with respect to any such Plan, that has subjected or could
reasonably be expected to subject any ROP Sub or any Company Plan or any
successor thereto, to any tax, fine, penalty or other liability (other than, in
the case of any ROP Sub and such Company Plans, a liability arising in the
normal course to make contributions or payments, as applicable, when ordinarily
due under a Company Plan with respect to employees of such Persons); (iv) no
event has occurred and no condition exists, with respect to any Plan, that could
reasonably be expected to subject the Partnership or any of its Affiliates, or
any Plan maintained by the Partnership or any Affiliate (other than an affiliate
which becomes such pursuant to the transactions contemplated by this Agreement)
thereof, to any tax, fine, penalty or other liability, that would not have been
incurred by the Partnership or any of its affiliates, or any such Plan, but for
the transactions contemplated hereby; (v) no Plan exists which could result in
the payment of money or any other property or rights, or accelerate or provide
any other rights or benefits, to any current or former employee of any ROP Sub
(or other current or former service provider thereto) that would not have been
required but for the transactions provided for herein; and (vi) no ROP Sub, nor
any of Affiliate of a ROP Sub, is a party to any Plan, program, arrangement or
understanding that would result, separately or in the aggregate, result in the
payment (whether in connection with any termination of employment or otherwise)
of any "excess parachute payment" within the meaning of Section 280G of the Code
with respect to a current or former employee of, or current or former
independent contractor to, such Person.


                                       41
<PAGE>



     Section 10.22 Each Contributor represents that no representation or
warranty made by it in this Agreement and no exhibit or schedule referred to in
this Section 10 or in Section 23 hereof and represented to by such Contributor,
contains any untrue statement of a material fact.

     If, prior to any Closing Date, the Partnership shall discover that any of
the representations contained in this Section 10 are likely to be false as of
such Closing Date and, as a result of such falsity, a Material Adverse Effect is
likely to occur, then the Partnership shall give the Contributors with respect
to such Closing notice of such falsity and the Partnership's estimation of the
amount of the potential Loss. Thereafter, the Contributors who made such false
representations and/or any other Contributor shall have the right to correct any
such falsity within twenty (20) Business Days of its receipt of such notice such
that a Material Adverse Effect shall no longer exist; provided, however, that in
the event that the Contributors who made such false representation and/or any
other Contributor shall be unable or unwilling to cure any such falsity, the
Contributors who made such false representations and/or any other Contributor
may, upon written notice to the Partnership, elect to reduce the Consideration
due to such Contributors such that a Material Adverse Effect shall no longer
exist. If one or more Contributors do not elect to cure such falsity or reduce
the Consideration as aforesaid, the Partnership shall have the right to
terminate this Agreement with respect to Properties for which a Closing has not
yet occurred. Notwithstanding the foregoing, it is expressly understood that (i)
the Contributors shall not have the right to cure any inaccurate or untrue
representations contained in this Agreement if the aggregate Loss resulting
therefrom would exceed $25,000,000 and (ii) in the event the aggregate Loss
resulting from any inaccurate or untrue representations set forth in Section 10
hereof (other than those representations set forth in Section 10.18 hereof)
shall exceed $20,000,000 (but shall be less than $25,000,000, in the aggregate),
then the Contributors with respect to such Closing may, at their option, elect
to cure any such inaccurate or untrue representations, or reduce the applicable
Consideration as aforesaid, such that the aggregate Loss likely to result
therefrom shall not exceed $15,000,000.

     All representations, warranties and covenants of the Contributors contained
in Sections 10.01, 10.02, 10.08, 10.09, 10.10, 10.11(a) and (f), 10.13, 10.17,
10.19, 10.20 and 10.22 (with respect to Schedule 22 only) shall survive the
applicable Closing for six (6) months. All other representations, warranties and
covenants of the Contributors contained in this Section 10 shall survive the
applicable Closing for twelve (12) months.

              SECTION 11: THE CONTRIBUTORS' INSTRUMENTS AT CLOSING

     Section 11.01. The applicable Contributors shall execute, or where
applicable, cause the following to be delivered to the Partnership on each
Closing Date:

     (a) an Assignment and Assumption Agreement in the form of EXHIBIT J
attached hereto with respect to the Contributors' interest in each Existing
Owner;

     (b) an affidavit to the Title Insurer in the form of EXHIBIT V attached
hereto;


                                       42
<PAGE>

     (c) a certificate from an executive officer, managing member or general
partner (or comparable person), as the case may be, of each Contributor stating
that (x) all representations and warranties made by such Contributor in this
Agreement are true and correct at Closing, as if made on such date, except (i)
to the extent such representations and warranties speak as of an earlier date,
provided that such representations and warranties shall be true and correct as
of such earlier date unless the failure of such representations and warranties
to be true and correct would not have a Material Adverse Effect or (ii) to the
extent the failure of such representations and warranties to be true in all
respects, individually or in the aggregate, would not have a Material Adverse
Effect;

     (d) the plans with respect to the buildings on the Property to the extent
in such Contributor's possession;

     (e) the Investor Questionnaire in the form of EXHIBIT H attached hereto;

     (f) a Registration Rights Agreement for each Contributor;

     (g) with respect to each Closing, the tenant estoppel certificates (or
landlord estoppels) described in Section 32 hereof;

     (h) a payoff letter from the holder(s) of the Existing Mortgages, if such
Existing Mortgages shall be repaid at such Closing and, in the event such
Existing Mortgages shall not be repaid, a consent to the transaction
contemplated hereby, if the same shall be required, pursuant to the loan
documents executed in connection with the closing of the applicable Existing
Mortgage loan;

     (i) an opinion of counsel, with respect to the items set forth on SCHEDULE
4.2 hereto, in form and substance reasonably acceptable to the Partnership, from
counsel(s) to the Existing Owners;

     (j) any non-disturbance obtained from any of the Tenants set forth in
SCHEDULE 11 attached hereto;

     (k) a Preferred Unit Recipient Agreement in the form of EXHIBIT W hereto
and such other documents as may be required in connection with the admission of
each Equity Holder who receives Units as an additional limited partner of the
Partnership;

     (l) quitclaims as to intangibles;

     (m) termination of all existing management contracts and evidence that all
sums payable to the managers thereunder have been paid in full;

     (n) an Assignment, Assumption and Indemnity Agreement in the form of
EXHIBIT Q hereto;


                                       43
<PAGE>


     (o) a complete listing of all Leases;

     (p) a list setting forth any Tenant delinquencies;

     (q) evidence that (i) all amounts due under (x) that certain Amended and
Restated Credit Agreement, dated as of January 12, 1999, between RMOP, ROP, ING
(U.S.) Capital LLC, the Chase Manhattan Bank and the institutions serving as
lenders thereunder from time to time and (y) that certain Credit Agreement,
dated as of July 23, 1998, between RMOP, ROP, the Chase Manhattan Bank, UBS, AG,
New York Branch, PNC Bank, National Association and the institutions serving as
lenders thereunder from time to time have been paid in full, and (ii) that RMOP
has been released from any and all obligations with respect to the credit
agreements described in (x) and (y) above;

     (r) Letters of resignation from Joseph Morris, Robert Morris, Mark M. Bava
and Ronald Schram confirming that (i) such Persons are no longer employees of
RMOP, (ii) such Persons' employment agreements with RMOP are no longer in effect
and RMOP shall have no further liability thereunder and (iii) all the options
issued by RMOP in connection with the formation of RMOP shall terminate and RMOP
shall have no further liability with respect thereto; and

     (s) Written confirmation from Trenton Road Corporation that the Purchase
Options to which it is a party remain in full force and effect as of the Stage I
Closing Date and that it consents to the transaction by which the Partnership
and/or the REIT, as applicable, acquire the outstanding equity interests in
RMOP.

     Section 11.02. The Morris Contributors shall execute, or where applicable,
cause the following to be delivered to the Partnership on the Stage I Closing
Date.

     (a) an Industrial Property Investment and Exclusivity Agreement in the form
of EXHIBIT F attached hereto;

     (b) a Property Management and Leasing Commission Agreement in the form of
EXHIBIT G attached hereto;

     (c) a lease, with respect to space occupied by an affiliate of the Morris
Contributors at the 535 Secaucus Road Property, in the form of EXHIBIT C
attached hereto;

     (d) a Security Deposit Indemnity Agreement in the form of EXHIBIT T
attached hereto;

     (e) Amended and Restated Purchase Option Agreements in the form of EXHIBIT
P attached hereto, with respect to the Cranbury South River Road and Herrod
Boulevard Properties; and

     (f) An Operating Agreement for the Development LLC organized to own the
Kraft Property, in the event the Board of ARE approves the acquisition of such
property;


                                       44
<PAGE>


     (g) the letters of resignation described in Section 11.01(r) above;

     (h) the Mechanics Liens and Environmental Indemnity;

     (i) an indemnity agreement with respect to brokerage claims relating to the
Coca Cola Lease at the Moonachie Property, in the form of EXHIBIT N hereto; and

     (j) an opinion from either Ballard Spahr Andrews & Ingersoll, LLP or Brown
& Wood llp in the form of SCHEDULE 34 attached addressed to the REIT and the
Partnership and satisfactory to the REIT and the Partnership in their sole
discretion provided, however, that if such opinion is not delivered as
aforesaid, then, in lieu of the delivery of such opinion, the Morris Trusts
shall transfer their Contributed Interests prior to the Stage I Closing Date
such that all of the Contributors are accredited investors as defined in
Regulation D under the Securities Act.

     Section 11.03. Intentionally Deleted.

     Section 11.04. On or before the Stage II Closing Date, the Morris
Contributors shall deliver the plans and specifications with respect to the
construction work at the Nixon Park Property to the Partnership.

     Section 11.05. The RMOP Contributors shall use commercially reasonable
efforts to deliver to the Partnership, with respect to the Tenants listed on
SCHEDULE 29 hereto, waivers (each, an "OFFER WAIVER") of any rights of first
offer/refusal and/or options to purchase a Property held by such Tenants
(which waivers may be present in tenant estoppels delivered by such Tenants)
at the Stage I Closing. The delivery of the Offer Waivers to the Partnership
shall not be a condition precedent to the Stage I Closing and in the event
any Offer Waiver is not obtained (a) subject to the immediately succeeding
sentence, the applicable Property shall be conveyed to the Partnership in
accordance with the terms of this Agreement, (b) the RMOP Contributors shall
pay 50% of the reasonable legal fees incurred by the Partnership with respect
to any alleged violation of a right of first offer/refusal and/or options to
purchase contained in the Leases to the Tenants described on SCHEDULE 29 hereto,
and (c) the RMOP Contributors shall pay 75% of any damages awarded to the
applicable Tenant as a result of a violation of the applicable right of first
offer/refusal and/or options to purchase and 75% of any Transfer Taxes incurred
in connection with a transfer of the applicable Property to such Tenant, in the
event the REIT, the Partnership and/or the RMOP Contributors shall be obligated
to pay the same; provided, however, that RMIT shall have control over any
litigation which arises with such Tenant (but shall keep the Partnership
informed with respect to such litigation); provided, further that RMIT shall
have no liability for such attorneys fees or such damages if the Partnership
obtains reimbursement for such fees or damages from the Title Insurer pursuant
to any affirmative insurance from the Title Insurer with respect to such rights
of first offer/refusal and/or options to purchase. In the event the RMOP
Contributors shall be unable to obtain any Offer Waiver prior to the Stage I
Closing Date, and the Tenant with respect to such Offer Waiver shall (i) inform
RMOP or any RMOP Contributor in writing that it wants to purchase the applicable
Property or (ii) seek to obtain an injunction enjoining the RMOP Contributors
from


                                       45
<PAGE>


proceeding with all, or any portion of the Stage I Closing (and such effort to
obtain an injunction shall not be dismissed), then the RMOP Contributors shall,
subject to Evidence of ISRA Compliance, cause RMOP to convey the applicable
Property(s) to either (x) one or more newly formed limited liability companies
(each, a "CONTINGENCY LLC") in which the RMOP Contributors (other than RMIIGP)
will be members, owning percentage interests identical to such Persons'
beneficial interest in Nixon (pursuant to operating agreements in form and
substance substantially similar to the Nixon operating agreement) or (y) the
applicable Tenant(s); whereupon the Partnership, the REIT and the RMOP
Contributors shall proceed with the Stage I Closing, with an appropriate
adjustment in the Stage I Consideration based on the allocated value of the
applicable Property. Thereafter, in the event the RMOP Contributors shall obtain
any previously undelivered Offer Waivers, the RMOP Contributors (other than
RMIIGP) shall, upon thirty (30) days prior written notice to the Partnership,
contribute and transfer to the Partnership and the REIT, as applicable, and in
consideration of such contribution, the Partnership and the REIT, as applicable,
shall accept from the RMOP Contributors (other than RMIIGP), subject to and in
accordance with the terms, provisions, covenants and conditions set forth in
this Agreement, all of the membership interests the applicable Contingency LLC,
and the Partnership and the REIT, as applicable, shall deliver or cause to be
delivered to the RMOP Contributors the applicable portion of the Stage I
Consideration based on the allocated value of the applicable Property.

               SECTION 12: PARTNERSHIP AND REIT'S REPRESENTATIONS
                                 AND WARRANTIES

     Section 12.01. To induce the Contributors to enter into this Agreement,
each of the Partnership and the REIT, as applicable, make the following
representations and warranties, all of which the Partnership and the REIT
represent are true in all material respects as of the date hereof and shall be
true in all material respects as of the applicable Closing Date and shall be
deemed to be remade as of that date.

     (a) The Partnership is a limited partnership duly formed, validly existing
and in good standing under the laws of the State of Delaware and has all
requisite partnership power and authority to own the Properties, to own, lease
and operate its properties and assets as they are now owned, leased and operated
and to carry on its business as now conducted and presently proposed to be
conducted. The Partnership is duly qualified, licensed or admitted to do
business and is in good standing in those jurisdictions in which the ownership,
use, or leasing of its assets and properties, or the conduct or nature of its
business makes such qualification, licensing or admission necessary, except for
failure to be so qualified, licensed or admitted and in good standing that
individually or in the aggregate would not materially adversely affect the
assets, business, operations or condition (financial or otherwise) of the
Partnership or the ability of the Partnership to perform its obligations under
this Agreement (an "ACQUIROR MATERIAL ADVERSE EFFECT").

     (b) The Partnership has all partnership power and authority to enter into,
execute and deliver this Agreement and to perform fully its obligations
hereunder. The execution, delivery


                                       46
<PAGE>


and performance by the Partnership of this Agreement and the other documents to
be delivered by the Partnership at any Closing, and the consummation by the
Partnership of the transactions contemplated hereby and thereby are permitted
under the Partnership Agreement and at each Closing will have been duly and
validly authorized by all necessary partnership action on the part of the
Partnership. This Agreement has been duly executed and delivered by the
Partnership and is a valid and binding obligation of the Partnership,
enforceable against the Partnership in accordance with its terms, except as such
enforceability may be limited by either (i) bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally, or (ii) general equitable principles (regardless of
whether enforcement is considered in a proceeding in equity or at law). The
Partnership has obtained (or will, by the Closing, have obtained) all consents
necessary (whether from a governmental authority or other third party) in order
for it to consummate the transactions contemplated hereby, other than such
consents the failure of which to obtain could, in the aggregate, reasonably be
expected to have an Acquiror Material Adverse Effect.

     (c) The Partnership is not (a) in violation of the Partnership Agreement;
(b) subject to obtaining the consents referred to in Section 12.01(b), in
default, and no event has occurred which, with notice or lapse of time or both,
would constitute such a default, in the due performance or observance of any
obligation, agreement, covenant or condition contained in any material
indenture, note, mortgage, deed of trust, loan or credit agreement, lease,
contract or other material agreement or instrument to which it is a party or by
which it is bound or to which any of its properties or assets is subject or by
which it, or any of them, may be materially affected or (c) in violation or in
conflict with any provision of any legal requirements applicable to the
Partnership or its assets, except in the case of clauses (b) and (c) for such
defaults, violations or conflicts that individually or in the aggregate would
not reasonably be expected to have a Acquiror Material Adverse Effect.

     (d) The Partnership Agreement is in full force and effect and has not been
amended or modified since December 23, 1998 (other than any amendment which
solely amends EXHIBIT A thereto, any amendment which sets forth the designations
and preferences of preferred units of limited partnership of the Partnership
which are junior to, or on parity with, the Units and the amendment contemplated
by EXHIBIT S hereto).

     (e) There is no existing, or to the knowledge of the Partnership,
threatened, legal action or governmental proceedings of any kind involving the
Partnership, or its assets or its subsidiaries or its subsidiaries' assets or
the operation of any of the foregoing, which, if determined adversely to the
Partnership, its subsidiaries or their respective assets, would have an Acquiror
Material Adverse Effect.

     (f) As of July 21, 1999, all of the outstanding interests in the
Partnership consist of 14,534,796 units of limited partnership interest,
7,501,747 of which are owned by the REIT, 800,000 Series A Convertible Preferred
units of limited partnership interest, all of which are owned by the REIT,
300,000 Series B Convertible Preferred units of limited partnership interest,
none of which are owned by the REIT and 450,700 Series D Convertible Preferred
units of


                                       47
<PAGE>

limited partnership interest, none of which are owned by the REIT. As of July
21, 1999, except for the Partnership's Series A, Series B and Series D
Convertible Preferred Units, there are no outstanding securities convertible
into or exchangeable for any interests in the Partnership and no outstanding
options, rights (preemptive or otherwise) or warrants to purchase or subscribe
for such interests. The Units to be issued to the Contributors have been duly
authorized and, when issued by the Partnership, will be duly authorized, validly
issued, fully paid and non-assessable, free and clear of any mortgage, pledge,
lien, encumbrance, security interest, claim or rights of interest of any third
party of any nature whatsoever. The shares of REIT Common Stock and Preferred
Stock which may be issued upon conversion or exchange of the Units have been
duly authorized and reserved for issuance, upon such issuance, will be fully
paid and non-assessable, free and clear of any mortgage, pledge, lien,
encumbrance, security interest, claim or rights of interest of any third party
of any nature whatsoever. Other than the Requisite Approvals, at or prior to
each Closing, the REIT shall have given such consents and taken such actions as
necessary to vest each Contributor which receives Units with the conversion
rights set forth in Section 6 of the Certificate of Designation of the Series C
Convertible Preferred Units.

     (g) The Partnership has furnished to each Contributor a true and complete
copy of the Partnership Agreement and all amendments, modifications and
supplements thereto.

     (h) The execution and delivery of this Agreement and the performance by the
Partnership of its obligations hereunder do not and will not conflict with or
violate any law, rule, judgment, regulation, order, writ, injunction or decree
of any court or governmental or quasi-governmental entity with jurisdiction over
the Partnership, including, without limitation, the United States of America,
the States of New York or New Jersey or any political subdivision of any of the
foregoing, or any decision or ruling of any arbitrator to which the Partnership
is a party or by which the Partnership is bound or affected and no consent of
any governmental agency is required.

     (i) The REIT is a corporation duly organized, validly existing and in good
standing under the laws of the State of Maryland and has all requisite power and
authority to own, lease and operate its properties and assets as they are now
owned, leased and operated and to carry on its business as now conducted and
presently proposed to be conducted. The REIT is duly qualified, licensed or
admitted to do business and is in good standing in those jurisdictions in which
the ownership, use, or leasing of its assets and properties, or the conduct or
nature of its business makes such qualification, licensing or admission
necessary, except for failures to be so qualified, licensed or admitted and in
good standing that individually or in the aggregate would not materially
adversely affect the assets, business, operations or condition (financial or
otherwise) of the REIT (a "REIT MATERIAL ADVERSE EFFECT"). The REIT is the sole
general partner of the Partnership.

     (j) The REIT has all requisite power and authority to enter into, execute
and deliver this Agreement on its own behalf and in its capacity as general
partner of the Partnership and to perform fully its obligations hereunder on its
own behalf and in its capacity as general partner of the Partnership. The
execution, delivery and performance by the REIT of this Agreement and


                                       48
<PAGE>


the other documents to be delivered by the REIT at any Closing on its own behalf
and in its capacity as general partner of the Partnership (including, but not
limited to, the Articles Supplementary with respect to the Preferred Stock), and
the consummation by the REIT of the transactions contemplated hereby and thereby
at any Closing will have been duly and validly authorized by all necessary
action on the part of the REIT. The Board of ARE and the Board of Directors of
Keystone Property Trust have duly adopted the resolutions set forth in Schedule
25 attached; and such resolutions of the Board of ARE and the Board of Directors
of Keystone Property Trust shall remain in full force and effect and shall not
be amended, altered or repealed, except as therein provided. This Agreement has
been duly executed and delivered by the REIT and is a valid and binding
obligation of the REIT, enforceable against the REIT in accordance with its
terms, except as such enforceability may be limited by either (i) bankruptcy,
insolvency, reorganization, moratorium or other similar laws affecting the
enforcement of creditors' rights generally, or (ii) general equitable principles
(regardless of whether enforcement is considered in a proceeding in equity or at
law). Other than Requisite Approvals, the REIT has obtained (or will, by the
applicable Closing, have obtained) all consents necessary (whether from a
governmental authority or other third party) in order for it to consummate the
transactions contemplated hereby, other than such consents, the failure of which
to obtain could, in the aggregate, reasonably be expected to have a REIT
Material Adverse Effect.

     (k) The REIT is not (a) in violation of its Charter or By-Laws, (b) subject
to obtaining the consents referred to in Section 12.01(j), in default, and no
event has occurred which, with notice or lapse of time or both, would constitute
such a default, in the due performance or observance of any obligation,
agreement, covenant or condition contained in any material indenture, mortgage,
deed of trust, loan or credit agreement, lease, contract or other material
agreement or instrument to which is a party or by which it is bound or to which
any of its properties or assets is subject or by which it, or any of them, may
be materially affected, or (c) in violation or in conflict with any provision of
any legal requirements applicable to the REIT or its assets, except in the case
of clauses (b) and (c) for such defaults, violations or conflicts that
individually or in the aggregate would not reasonably be expected to have a REIT
Material Adverse Effect.

     (l) There is no existing, or, to the knowledge of the REIT, threatened
legal action or governmental proceedings of any kind involving the REIT, any of
its assets or its subsidiaries or its subsidiaries' assets or the operation of
any of the foregoing, which, if determined adversely to the REIT, its
subsidiaries or their respective assets would have a REIT Material Adverse
Effect.

     (m) The authorized capital stock of the REIT consists of 65,000,000 shares
of capital stock, of which, as of July 21, 1999, 64,200,000 shares are
designated as REIT Common Stock and 800,000 shares are designated as Series A
Convertible Preferred Stock. All of such issued shares of REIT Common Stock and
issued shares of Series A Convertible Preferred Stock are validly issued, fully
paid and non-assessable and have been offered and sold in compliance with all
applicable laws (including, without limitation, federal and state securities
laws). No shares of capital stock of the REIT are reserved for any purpose
except in connection with (a) the REIT's Amended and Restated 1993 Omnibus
Incentive Plan, (b) Amended and Restated 1994 Non-Employee Stock Incentive Plan,
(c) the possible issuance of Common REIT Stock upon the


                                       49
<PAGE>


conversion of shares of Preferred Stock, (d) the possible issuance of 675,000
shares of REIT Stock upon the exercise of 675,000 warrants issued by the REIT,
and (e) the possible issuance of Common REIT Stock upon the exchange of units of
limited partnership interest in the Partnership. Except for the shares of the
REIT's Series A Convertible Preferred Stock and except as set forth on SCHEDULE
19 hereto, as of the date of this Agreement, there are no outstanding securities
convertible into or exchangeable for any capital stock of the REIT and no
outstanding options, rights (preemptive or otherwise) or warrants to purchase,
or to subscribe for such shares. The shares of REIT Common Stock and Preferred
Stock to be issued to the Contributors have been duly authorized and, when
issued by the REIT, will be duly authorized, validly issued, fully paid and
non-assessable, free and clear of any mortgage, pledge, lien, encumbrance,
security interest, claim or rights of interest of any third party of any nature
whatsoever and will not be subject to preemptive or other similar rights arising
by operation of law, under the Charter and By-Laws of the REIT or under any
agreement to which the REIT is a party or otherwise. The shares of REIT Common
Stock to be issued upon conversion of the Preferred Stock have been duly
authorized and reserved for issuance, upon such issuance, will be fully paid and
non-assessable, free and clear of any mortgage, pledge, lien, encumbrance,
security interest, claim or rights of interest of any third party of any nature
whatsoever. The Articles Supplementary will be in full force and effect on or
prior to each applicable Closing and will comply with all applicable legal
requirements.

     (n) Commencing with the REIT's taxable year ended December 31, 1993, and
through its taxable year ended December 31, 1998, the REIT has qualified as a
real estate investment trust under the Code, and the REIT is organized and
operates in a manner that will enable it to continue to qualify as a real estate
investment trust under the Code.

     (o) The REIT has furnished to each Contributor a true and complete copy of
its Charter and By-Laws and all amendments, modifications and supplements
thereto.

     (p) The execution and delivery of this Agreement and the performance by the
REIT of its obligations hereunder do not and will not conflict with or violate
any law, rule, judgment, regulation, order, writ, injunction or decree of any
court or governmental or quasi-governmental entity with jurisdiction over the
Partnership, including, without limitation, the United States of America, the
States of New York or New Jersey or any political subdivision of any of the
foregoing, or any decision or ruling of any arbitrator to which the REIT is a
party or by which the REIT is bound or affected and no consent of any
governmental agency is required.

     (q) The REIT has prepared or caused to be prepared and timely filed all tax
returns required to be filed on or before the date hereof with respect to the
Partnership and the REIT, the failure of which to file would have an Acquiror
Material Adverse Effect or a REIT Material Adverse Effect, which tax returns are
true, correct and complete in all material respects. The REIT has paid or made
provision for the payment of all taxes that are due or claimed to be due from it
on or before the date hereof by any governmental taxing authority, the failure
of which to pay would have an Acquiror Material Adverse Effect or a REIT
Material Adverse Effect. No federal, state, local or foreign taxing authority
has asserted any tax deficiency, lien, interest or


                                       50
<PAGE>


penalty or other assessment against the REIT or the Partnership which has not
paid and there is no pending audit or inquiry from any federal, state, local or
foreign tax authority relating to the REIT or Acquiror that may be expected to
result in a tax deficiency, lien interest or other assessment against the REIT
or the Partnership's assets, which in the aggregate would have an Acquiror
Material Adverse Effect or a REIT Material Adverse Effect.

     (r) The REIT has filed all forms, reports, schedules, proxy materials,
registration statements and related prospectuses and supplements and other
documents required to be filed by the REIT with the Securities and Exchange
Commission (the "SEC") pursuant to the Securities Act or the Securities Exchange
Act of 1934, as amended, for the year ending December 31, 1998 and from December
31, 1998 up to the date hereof (collectively, the "SEC DOCUMENTS") and will
cause to be delivered to the Contributors copies of such documents as may be
filed with the SEC by the REIT between the date hereof and the Stage III Closing
Date. The SEC Documents were, and those additional documents filed between the
date hereof and the Stage III Closing will be, prepared and filed in all
material respects in compliance with the rules and regulations promulgated by
the SEC, and do not contain any untrue statement of a material fact or omit to
state any material fact required to be stated therein in order to make the
statements contained therein, in light of the circumstances under which they
were made, not misleading.

     (s) Intentionally Deleted.

     (t) The REIT represents that attached hereto as SCHEDULE 20 is a copy of a
term sheet which provides for an investment of at least $40,000,000 in equity in
the REIT and that the securities issued or to be issued in connection with such
investment shall be equivalent or subordinate in priority with respect to
distributions (including distributions upon liquidation) to the Preferred Stock.

     (u) The REIT and the Partnership represent and warrant that, as of the
Stage I Closing Date and subject to the terms of this Agreement, the
Contributors shall have the right to convert the Preferred Stock and Units
(subject to the right of the Partnership to deliver cash rather than REIT Common
Stock upon conversion of the Units) into approximately 1.4 million shares of
REIT Common Stock (together with the REIT Common Stock to be issued at the Stage
I Closing, representing 19.9% of the total number of shares of REIT Common Stock
that are issued and outstanding as of the date hereof) and that the REIT shall
not take any action (including through the repurchase of REIT Common Stock or
otherwise) that would reduce the number of outstanding shares of REIT Common
Stock prior to obtaining the Requisite Approvals.

     (v) On or prior to the Stage I Closing, (A) subject to the delivery by ROP
of the Reckson Representation Letter, ROP's ownership of (i) any REIT Common
Stock and any Preferred Stock to be issued to ROP pursuant to this Agreement,
(ii) any Preferred Stock or REIT Common Stock into which any Units to be issued
to ROP pursuant to this Agreement are convertible or exchangeable, and (iii) any
REIT Common Stock into which any Preferred Stock described in (i) or (ii) is
convertible shall have been irrevocably excepted from the ownership limit
provisions of


                                       51
<PAGE>

Article VI of the Charter as provided in Section 6.2.7 thereof, ROP shall have
received the Reckson Waiver of Ownership Limits Letter and an Excepted Holder
Limit (as defined in the Charter) shall have been established for ROP and the
Board of ARE shall have taken such other action as ROP shall have reasonably
requested to irrevocably except such shares from the Ownership Limit (as defined
in the Charter) and (B) the Ownership Limit with respect to the Preferred Stock
shall have been increased to 15%. For purposes of this Section 10.12(v),
references to ROP shall also be deemed to be references to RA, RMIT, Reckson
Construction and wholly-owned Affiliates of ROP, RA, RMIT and Reckson
Construction.

     (w) The REIT represents and warrants that Keystone Property Trust is a
"qualified REIT subsidiary" as such term is defined in Section 856(i) of the
Code.

     All representations, warranties and covenants of the Partnership and/or the
REIT contained in Sections 12.01 (a), (b), (c), (h), (i), (j), (o), (p), (q),
shall survive the applicable Closing for six (6) months. All other
representations, warranties and covenants of the Partnership and/or the REIT
contained in this Section 12 shall survive the applicable Closing for twelve
(12) months; PROVIDED, HOWEVER, that to the extent that any claim for
indemnification is made under this Agreement prior to the expiration of the
survival period relating to such representation and warranty, such survival
period will be extended as it relates to such related claims until the related
claim for indemnification has been satisfied or otherwise resolved as provided
in Section 35.

          SECTION 13: PARTNERSHIP'S AND REIT'S INSTRUMENTS AT CLOSING

     Section 13.01. On each Closing Date, the Partnership shall deliver the
applicable Consideration to the Contributors. Additionally, on each Closing
Date, the Partnership and the REIT, as applicable, shall execute and deliver the
following, or cause the following to be executed and delivered, to the
Contributors:

     (a) a certificate of an officer of the REIT stating that all
representations and warranties made by Partnership and the REIT in this
Agreement are true and correct at Closing, as if made on such date, except (i)
to the extent such representations and warranties speak of an earlier date,
provided that such representations and warranties shall be true and correct as
of such earlier date unless the failure of such representations and warranties
to be true and correct would not have an Acquiror Material Adverse Effect or
REIT Material Adverse Effect, (ii) to the extent the failure of such
representations and warranties to be true in all respects, individually or in
the aggregate, would not have an Acquiror Material Adverse Effect or REIT
Material Adverse Effect or (iii) any inaccuracy of any representation or
warranty of the REIT contained herein which results solely as a result of the
merger of the REIT with and into Keystone Property Trust with Keystone Property
Trust being the surviving entity, except as such inaccuracy may have an Acquiror
Material Adverse Effect or a REIT Material Adverse Effect;

     (b) opinions of counsel with respect to the matters set forth on SCHEDULE
4.1 (a) and (b) hereto, in form and substance reasonably acceptable to the
Contributors, from Rogers & Wells LLP and Piper & Marbury, L.L.P., respectively,
counsel to the REIT and the Partnership;


                                       52
<PAGE>


     (c) an Assignment and Assumption Agreement in the form of EXHIBIT J
attached hereto, with respect to the Contributors' interest in each Existing
Owner;

     (d) one Registration Rights Agreement for the Morris Contributors and one
Registration Rights Agreement for ROP and RMIT;

     (e) a certificate from the Partnership stating that the Contributors are
the holders of the Units;

     (f) all necessary consents for the issuance of the Consideration and the
Contributors' admission to the Partnership;

     (g) Articles Supplementary to the REIT's Articles of Incorporation in the
form of EXHIBIT R attached hereto;

     (h) Amendment(s) to the Partnership Agreement creating the Units (including
units relating to the Preferred Stock) in the form of EXHIBIT S attached hereto;

     (i) any amendments to existing credit facilities of the Partnership needed
to enter into the transactions contemplated by this Agreement;

     (j) all of the documents and other matters referred to in Section
16.01(b)(iii) hereof;

     (k) such other documents, instruments, resolutions and other material
necessary to effect the consummation of the transaction contemplated hereunder
and reasonably requested by the Contributors; and

     (l) an Assignment, Assumption and Indemnity Agreement in the form of
EXHIBIT Q hereto.

     Section 13.02. On the Stage I Closing Date, the Partnership shall deliver
to the Morris Contributors, or cause the following to be delivered to the Morris
Contributors:

     (a) an Industrial Property Investment and Exclusivity Agreement in the form
of EXHIBIT F attached hereto;

     (b) a Property Management Agreement and Leasing Commission Agreement in the
forms attached as EXHIBIT G attached hereto;

     (c) a lease, with respect to space occupied by an affiliate of the Morris
Contributors at the 535 Secaucus Road Property, in the form of EXHIBIT C
attached hereto; and

     (d) Amended and Restated Purchase Option Agreements in the form of EXHIBIT
P attached hereto, with respect to the Cranbury South River Road and Herrod
Boulevard Properties.


                                       53
<PAGE>


     Section 13.03. In the event the Letter of Credit shall have been delivered
on the date hereof, then the REIT, at the Stage I Closing, shall deliver an
amendment to the Letter of Credit providing that the Letter of Credit shall be
in favor of ROP.

                          SECTION 14: CONTRACT PERIOD

     Section 14.01. Throughout the Contract Period, the Contributors shall cause
the Existing Owners to continue operating the Properties in the same manner as
they are currently being operated by the Existing Owners or the Contributors, as
applicable. The Contributors shall cause the Existing Owners to maintain
replacement cost casualty insurance throughout the Contract Period. During the
Contract Period, the Existing Owners may enter into new lease agreements or
amendments (or renewals) to any existing Lease without the written consent of
the Partnership provided such Leases or amendments or renewals are consistent
with the Leasing Guidelines. No termination of a Lease may be implemented
without the Partnership's prior written consent, unless the applicable Tenant is
in default of a material lease term or has failed to make monthly rent payments
for more than ninety (90) days.

     Section 14.02. During the Contract Period, the Existing Owners shall not,
without the written consent of the Partnership, enter into any Contracts (other
than brokerage agreements which provide for customary market commissions, which
in no event shall be more than 5% of base rent) or amendments thereof unless
such Contracts (other than such brokerage agreements) shall be fully cancelable
or terminable (without charge to the Partnership) prior to the applicable
Closing Date.

     Section 14.03. During the Contract Period, RMOP shall transfer all of its
right, title and interest in Reckson Morris Development, Inc. and Reckson Morris
Management, Inc. to a third party. The Partnership hereby consents to the
provisions of the previous sentence; it being understood that the Partnership
shall not acquire the assets or the liabilities of Reckson Morris Development,
Inc. or Reckson Morris Management, Inc. in consummating the transactions
contemplated hereunder.

     Section 14.04. During the Contract Period, the Contributors shall permit
the REIT and its agents, representatives and employees, upon reasonable prior
notice to the applicable Contributors, the right to inspect the Properties and
the books and records of the Existing Owners, provided that any such inspection
does not interfere with the use and operation of the applicable Properties,
violate any Lease, or violate any applicable law. The REIT shall indemnify and
hold the applicable Contributor and Existing Owner harmless from any damages
caused by the REIT or any agent, representative and employee of the REIT during
any such inspection.

     Section 14.05. During the Contract Period, the Contributors shall deliver
to the REIT copies of any escalation roster, aged receivables and profit and
loss statements for the Properties requested by the REIT.


                                       54
<PAGE>


     Section 14.06. During the Contract Period, the Contributors shall not
permit the Existing Owners to (i) borrow or agree to borrow any funds or
mortgage or pledge any of its assets, tangible or intangible, in connection with
any loan which shall not be repaid prior to the applicable Closing, (ii) incur,
assume or become subject to, whether directly or by way of guarantee or
otherwise, any material obligation or liability, which shall not be repaid prior
to the applicable Closing, or (iii) sell, transfer or encumber, agree to sell,
transfer or encumber, or grant or agree to grant any preferential rights to
acquire, any of it assets, property or rights; provided, however, that an
Existing Owner may assign all or a portion of its interest hereunder to an
Affiliate in which one or more Contributors own at least 80% of the beneficial
interest thereof at the applicable Closing, provided all the beneficial owners
of such Affiliate assume all of the applicable Contributors' obligations
hereunder.

     Section 14.07. During the Contract Period, the Contributors shall not sell,
assign, grant any security interest in, pledge, encumber, dispose of, or
otherwise transfer all or any part of any of the interests in the Existing
Owners, except to the extent that the same shall be discharged prior to the
applicable Closing Date; provided, however, that a Contributor may sell, assign,
dispose of, or otherwise transfer all or a portion of its interest in an
Existing Owner to (i) an Affiliate in which such Contributor owns at least 80%
of the beneficial interest thereof at the applicable Closing or Reckson
Construction, provided such Affiliate or Reckson Construction, as applicable,
assumes all of the applicable Contributor's rights and obligations hereunder or
(ii) any other Contributor and in either event, such transferee shall thereafter
be deemed a Contributor for purposes of this Agreement; provided, further, that
no Contributor shall be relieved of any of its obligations hereunder by reason
of such transfer.

     Section 14.08. During the Contract Period, the Existing Owners may create
or suffer any easement, covenant, condition, restriction or other similar
agreement with respect to any of the Properties in the ordinary course of the
Existing Owners' operation of its Properties, unless such matter would have a
material adverse effect on the applicable Property.

     Section 14.09. During the Contract Period, the applicable Contributors
shall pay down the Existing Mortgages such that (i) the Existing Mortgages with
respect to the Stage I Properties shall not exceed $16,500,000, in the aggregate
on the Stage I Closing Date and (ii) the Existing Mortgages with respect to the
Stage II Properties shall not, in the aggregate, exceed the cash and assumed
indebtedness portions of the applicable Stage II Consideration, on the
applicable Stage II Closing Date.

     Section 14.10. Upon the occurrence of a default beyond any applicable
notice and grace period under any Lease during the Contract Period, the
applicable Contributors may cause the Existing Owners to terminate such Lease,
provided the applicable Contributors shall have first obtained the Partnership's
prior consent to such termination, which consent shall not be unreasonably
withheld, delayed or conditioned.

     Section 14.11. At or prior to each applicable Closing, the applicable
Contributor shall discharge any Liens encumbering such Contributor's interests
in the Existing Owners, if any.


                                       55
<PAGE>


     Section 14.12. During the Contract Period, ROP shall use commercially
reasonable efforts not to allow any of the previously issued permits and
approvals for the overall planned development/subdivision of the Vacant Cabot
Drive Land or the vested rights created by such permits and approvals to expire
or otherwise be adversely impacted in any material respect. In furtherance of
ROP's efforts, ROP and the Partnership shall work cooperatively with respect to
the Vacant Cabot Drive Land to seek and obtain extensions (or the reissuance) of
the (1) the approvals (i.e. subdivision and variances) granted by the Hamilton
Township Planning Board on June 28, 1990, (2) the Developer's Agreement with
such Township executed on December 3, 1996, (3) the Letter of Interpretation
issued by the NJDEP on August 27, 1991 and (4) any other related permits and
approvals. Any extension or reissuance fees shall be paid by the Partnership.

     Section 14.13. Between the date hereof and the Stage I Closing Date, no
equity securities, warrants or options shall be issued by the REIT; provided,
however, that the REIT may consummate (i) the transactions set forth on EXHIBIT
O attached hereto and (ii) those transactions proposed by the REIT which are
reasonably acceptable to ROP and either Joseph D. Morris or Robert Morris;
provided, further, that if the Contributors shall extend the Stage I Closing
Date for sixty (60) days or more, then the REIT shall have the right to issue
any equity securities, except as would be prohibited if the Contributors then
held Units; provided, however, that if prior to the Stage I Closing Date the
REIT or the Partnership shall declare and pay any special dividend to its
security holders, the Contributors shall be entitled to receive such special
dividend at the Stage I Closing with respect to the shares of Preferred Stock
and Units issued to such Contributors at the Stage I Closing, as if they held
such Equity that they receive on the Stage I Closing Date at the time of payment
of such special dividend.

                             SECTION 15: BROKERAGE

     Section 15.01. The Partnership and the Contributors represent and warrant
to each other that no broker or person was in any way instrumental or had any
part in bringing about this transaction. The Partnership agrees that, should any
claim be made for commissions by any broker or person arising by, through or on
account of any act of the Partnership or the Partnership's representatives, the
Partnership shall indemnify and hold the Contributors harmless from and against
any and all claim, liability, cost or expense (including reasonable attorneys'
fees) in connection therewith. The Contributors agree that should any claim be
made for commissions by any broker or person arising by, through or on account
of any act of any Contributor or such Contributor's representatives, such
Contributor shall indemnify and hold the Partnership and/or the REIT harmless
from and against any and all claim, liability, cost or expense (including
reasonable attorneys' fees) in connection therewith. The provisions of this
paragraph shall survive the Closings contemplated hereunder, but the provisions
hereof shall not be deemed or construed as a covenant for the benefit of any
third party.

                  SECTION 16: CONDITIONS PRECEDENT TO CLOSING

     Section 16.01. (a) The Partnership's and the REIT's obligations to acquire
the applicable Contributor's interest in the applicable Existing Owner in
accordance with this


                                       56
<PAGE>


Agreement on each Closing Date shall be subject to the satisfaction or waiver of
the following conditions precedent on or prior to such Closing Date:

          (i) all of the Contributors' representations and warranties made in
     this Agreement shall be true and correct at Closing, as if made on such
     date, except (x) to the extent such representations and warranties speak as
     of an earlier date, provided that such representations and warranties shall
     be true and correct as of such earlier date unless the failure of such
     representations and warranties to be true and correct would not have a
     Material Adverse Effect or (y) to the extent the failure of such
     representations and warranties to be true in all respects, individually or
     in the aggregate, would not have a Material Adverse Effect;

          (ii) the Partnership shall have received all the tenant estoppels (and
     landlord estoppels) described in Section 32 hereof with respect to such
     stage, each of which shall be substantially in the form attached hereto as
     EXHIBIT M (all estoppel certificates shall contain information reasonably
     satisfactory to the Partnership);

          (iii) the Contributors shall have performed all material obligations
     and agreements which they have undertaken to be performed pursuant to this
     Agreement at or prior to such Closing Date including the delivery of all
     instruments required to be delivered pursuant to Section 11 hereof;

          (iv) the Partnership shall have received from the holder of each
     Existing Mortgage any consent to the acquisition by the Partnership of the
     applicable Property required pursuant to the terms of the loan documents
     executed in connection with such Existing Mortgage, which consent shall
     impose no terms which are not reasonably acceptable to the Partnership or
     the REIT, and such holder's confirmation that the holder of such Existing
     Mortgage is not in default beyond any applicable notice and grace periods
     that exist under the applicable Existing Mortgage; and

          (v) the Partnership shall have received a payoff letter from the
     holder(s) of the Existing Mortgages, if such Existing Mortgages are
     scheduled to be repaid on the applicable Closing Date and, in the event
     such Existing Mortgages shall not be repaid on the applicable Closing Date,
     a consent to the transaction contemplated hereby, to the extent required.

     (b) The Contributors' obligations to transfer the applicable Contributors'
interest in the applicable Existing Owner in accordance with this Agreement on
each Closing Date shall be subject to the satisfaction or waiver of the
following conditions precedent on such Closing Date:

          (i) all of the Partnership's and the REIT's representations and
     warranties made in this Agreement shall be true and correct at Closing, as
     if made on such date, except (i) to the extent such representations and
     warranties speak of an earlier date, provided that such representations and
     warranties shall be true and correct as of such earlier date unless the
     failure of such representations and warranties to be true and correct would
     not have


                                       57
<PAGE>


     an Acquiror Material Adverse Effect or REIT Material Adverse Effect; (ii)
     to the extent the failure of such representations and warranties to be true
     in all respects, individually or in the aggregate, would not have an
     Acquiror Material Adverse Effect or REIT Material Adverse Effect or (iii)
     any inaccuracy of any representation or warranty of the REIT contained
     herein which results solely as a result of the merger of the REIT with and
     into Keystone Property Trust with Keystone Property Trust being the
     surviving entity, except as such inaccuracy may have an Acquiror Material
     Adverse Effect or a REIT Material Adverse Effect;

          (ii) intentionally omitted;

          (iii) the Partnership shall have provided the Contributors with
     evidence, in form and substance reasonably satisfactory to RMIT, Joseph D.
     Morris and Robert Morris, that one or more investors have invested or
     entered into a binding and irrevocable agreement to invest at least
     $40,000,000 in equity in the REIT, in the aggregate, in accordance with the
     provisions of the term sheet attached as SCHEDULE 20 hereto;

          (iv) the Partnership and the REIT shall have performed all material
     obligations and agreements undertaken by such Persons herein to be
     performed at or prior to such Closing Date; and

          (v) the REIT shall have delivered Stockholder Voting Agreements in the
     form of EXHIBIT I attached hereto to the Contributors from various
     shareholders who, collectively, represent the votes of shareholders owning
     in excess of 45% of the shares of the REIT Common Stock (including any REIT
     Common Stock issued in connection with the transaction contemplated by
     SCHEDULE 20 hereto), as of the Stage I Closing Date (without taking into
     account the REIT Common Stock which will be issued at the Stage I Closing).

                              SECTION 17: CLOSING

     Section 17.01. The Closings shall take place at the office of Brown & Wood
LLP, One World Trade Center, New York, New York, on the dates set forth in
Section 3 and, if applicable, Section 29 hereof.

                              SECTION 18: GIVAUDAN

     (a) RMOP shall use commercially reasonable efforts to cause that certain
Agreement of Sale between Givaudan Roure Corporation ("Givaudan") and RMOP dated
as of March 8, 1999 (the "Givaudan Agreement") to be assigned to the Morris
Contributors or any Affiliate of any of the Morris Contributors (a "Morris
Entity") effective as of the Stage I Closing Date by way of an assignment and
assumption agreement reasonably acceptable to the Morris Contributors and RMOP
(the "Givaudan Assignment"). If, after using commercially reasonable efforts,
RMOP is unsuccessful in obtaining the Givaudan Assignment by the Stage I Closing
Date, RMOP shall continue to use commercially reasonable efforts to obtain the
Givaudan Assignment during the


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<PAGE>

period commencing with the Stage I Closing Date and ending on the date of the
last closing under the Givaudan Agreement (the "Morris Period"). RMOP shall not
be obligated to incur any costs in its efforts to obtain the Givaudan
Assignment. During the Morris Period, the Morris Contributors shall have all of
the rights and privileges of RMOP under the Givaudan Agreement and applicable
law to develop the Givaudan Property at their sole cost and expense.

     (b) In addition to the foregoing, during the Morris Period, (i) RMOP: (A)
shall not interfere or take any action or fail to take action that would
adversely affect or hinder the Morris Contributors' development activities
regarding the Givaudan Property, (B) shall cooperate with and assist the Morris
Contributors' development of the Givaudan Property (including, without
limitation, executing the development related applications and submittals and
providing access to the Givaudan Property for engineering, planning and other
development purposes), at the Morris Contributors' expense, and (C) shall take
whatever actions, at the Morris Contributors' expense, as may be reasonably
desired by the Morris Contributors in connection with fulfilling RMOP's
obligations and enforcing RMOP's rights under the Givaudan Agreement; (ii) RMOP
agrees not to take any action under the Givaudan Agreement without first
notifying the Morris Contributors and obtaining the Morris Contributors' prior
written consent; (iii) RMOP shall send to the Morris Contributors any and all
notices it receives from Givaudan Roure Corporation or in any way relating to
the Givaudan Property or the Givaudan Agreement as promptly as possible but in
no event more than three (3) business days after RMOP's receipt thereof; (iv)
the Morris Contributors shall have the right to cure any and all defaults by
RMOP under the Givaudan Agreement and, if such default is due to the acts or
omissions of RMOP, and not the Morris Contributors, RMOP shall promptly
reimburse the Morris Contributors for any reasonable costs and expenses
(including reasonable attorneys' fees) incurred in connection with such cure;
(v) RMOP shall not sell, assign, pledge, hypothecate or otherwise transfer any
right, title or interest it may have in the Givaudan Agreement or the Givaudan
Property without the prior written consent of the Morris Contributors; (vi)
RMOP, at the request of the Morris Contributors, shall communicate with Givaudan
Roure Corporation as Seller under the Givaudan Agreement which communications
may include letters requesting information, negotiation of amendments or
clarifications of the Givaudan Agreement, or default notices; (vii) RMOP shall
not terminate or amend the Givaudan Agreement in any way without the prior
written consent of the Morris Contributors; (viii) if requested to do so by the
Morris Contributors, RMOP shall enter into such amendment to the Givaudan
Agreement in a manner requested by the Morris Contributors; and (ix) RMOP
covenants and agrees that at any closing under the Givaudan Agreement it shall
request that Givaudan deliver title to the Givaudan Property and all other
assets and rights conveyed by Givaudan (the "Other Property") to the Morris
Entity; provided (A) if such delivery is refused by Givaudan, simultaneously
with RMOP accepting title to the Givaudan Property and Other Property at any
closing pursuant to the Givaudan Agreement, RMOP shall simultaneously convey to
the Morris Entity (with the realty transfer fee paid by the Morris Entity) the
Givaudan Property and Other Property conveyed by Givaudan to RMOP pursuant to
the Givaudan Agreement, and (B) at any such closing, RMOP shall request from
Givaudan an assignment of Givaudan's obligations pursuant to paragraphs 17 and
18 of the Givaudan Agreement as provided for in paragraph 24 of the Givaudan
Agreement and shall cooperate with the Morris Contributors in enforcing any
obligations Givaudan may have to deliver such assignment.


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<PAGE>


     (c) The Morris Contributors hereby agree to indemnify, defend and hold
harmless RMOP from any loss, claim or expense including reasonable attorneys'
fees incurred by RMOP arising from (i) the actions of the Morris Contributors or
any other Morris Entity relating to the Property and the Givaudan Agreement,
(ii) the Givaudan Property, and (iii) RMOP's interest in the Givaudan Property;
provided, such indemnification obligation shall not apply to the extent such
loss, claim or expense is due to the actions of RMOP occurring after the Stage I
Closing Date.

     (d) At the Stage I Closing, RMOP shall assign all of its right, title and
interest in (i) the Agreement of Sale dated July 27, 1999 between RMOP, as
Seller, and Abrachem Properties, L.L.C., as Buyer, and (ii) the Agreement of
Sale dated _________, 1999 between RMOP, as Seller, and Reckson Operating
Partnership, L.P., as Buyer, to the Morris Contributors or to a Morris Entity
designated by the Morris Contributors.

     (e) All costs of complying with the Buyer's obligations under the Givaudan
Agreement and of enforcing the Givaudan Agreement shall be borne by the Morris
Contributors.

                              SECTION 19: NOTICES

Section 19.01. All notices, requests and demands to be made hereunder to the
parties hereto shall be in writing (at the addresses set forth below) and shall
be given by any of the following means: (a) personal delivery (including,
without limitation, overnight delivery, courier or messenger services); (b)
telecopying, or (c) registered or certified, first-class United States mail,
postage prepaid, return receipt requested. Notice by a party's counsel shall be
deemed to be notice by such party. All notices to the Contributors shall be sent
to the address set forth below. Such addresses may be changed by notice to the
other parties given in the same manner as provided above. Any notice, demand or
request sent (x) pursuant to subsection (a) shall be deemed received upon such
personal delivery, (y) pursuant to subsection (b) shall be deemed received on
the day it is dispatched by telecopier and (z) pursuant to subsection (c) shall
be deemed received five (5) days following deposit in the mail.


     If to ROP, RMIT or the GP: c/o Reckson Associates
                                225 Broadhollow Road
                                Melville, NY 11747-0983
                                Attention: General Counsel
                                Telecopy: (516) 694-6788


     With copies to:            Brown & Wood llp
                                One World Trade Center
                                New York, NY 10048-0557
                                Attention:  Jeff Feigelson, Esq.
                                Telecopy: (212) 839-5599



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<PAGE>

     If to Morris:              c/o Reckson Morris Operating Partnership
                                535 Secaucus Road
                                Secaucus, New Jersey
                                Attention: Mr. Mark M. Bava,
                                Chief Financial Officer
                                Telecopy: (201) 863-2247

     With copies to:            Ballard Spahr Andrews & Ingersoll, LLP
                                1735 Market Street, 51st Floor
                                Philadelphia, Pennsylvania 19103
                                Attention: Bart I. Mellits, Esq.
                                Telecopy: (215) 864-8999

     If to the Partnership
        or the REIT:            c/o American Real Estate Investment Corporation
                                620 West Germantown Pike
                                Suite 200
                                Plymouth Meeting, PA 19462
                                Attention: President
                                Telecopy: (610) 834-9560

     With copies to:            Rogers & Wells LLP
                                Two Hundred Park Avenue
                                New York, NY 10166-0153
                                Attention:  Robert E. King, Jr., Esq. and
                                Bonnie A. Barsamian, Esq.
                                Telecopy: (212) 878-8375

              and               Wolf, Block, Schorr and Solis-Cohen LLP
                                1650 Arch Street
                                22nd Floor
                                Philadelphia, Pennsylvania 19103-2097
                                Attn: Henry F. Miller, Esq.
                                Telecopy: (215) 977-2334


                              SECTION 20: DEFAULT

     Section 20.01. PARTNERSHIP'S DEFAULT. If the Partnership or the REIT shall
be in default for more than ten (10) Business Days after receipt of written
notice of any material obligations imposed upon the Partnership or the REIT by
this Agreement, and the Contributors have performed or have offered to perform
their obligations hereunder or if the Partnership and the REIT are unable to
deliver the certificate set forth in Section 13.01(a) hereof at the applicable
Closing and the same shall not be cured within ten (10) days, then the
Contributors shall have the right to treat this Agreement as having been
breached by the Partnership and/or the REIT and the Contributors' sole remedy on
account of such breach shall be the right to terminate this


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<PAGE>


Agreement as to any Properties for which Closing has not yet occurred by written
notice to the REIT, the Partnership, and as applicable, the other Contributors
from (i) RMIT, with respect to the Stage I Closing and the Stage II Closing,
(ii) Joseph D. Morris or Robert Morris, with respect to any default which would
have a material adverse effect on the Morris Contributors, or (iii) ROP, with
respect to the Stage III Closing; provided, however, that such right to
terminate this Agreement shall apply only to Closing(s) which shall not yet have
occurred. Upon such termination (a) the Partnership shall forfeit all rights and
claims pursuant to this Agreement with respect to the applicable Existing Owners
and the Properties for which a Closing shall not yet have been completed, (b)
the Escrow Agent shall either remit the Downpayment Amount to the Contributors
in proportion to the value of their respective beneficial interests in the
Properties for which a Closing shall not yet have occurred or deliver the Letter
of Credit deposited with Escrow Agent to the beneficiary thereunder and such
beneficiary may draw on the Letter of Credit and remit the proceeds thereof to
the Contributors in proportion to the value of their respective beneficial
interests in the Properties for which a Closing shall not yet have occurred and
(c) the Contributors shall be entitled to receive cash from the REIT with
respect to any Preferred Stock or Units that may not be converted (as a result
of the failure to obtain Shareholder's Approval) in an amount equal to the REIT
Common Stock that such securities are convertible into, provided, however, that
in no event shall such cash amount be less than the liquidation preference of
the Preferred Stock or Units being converted. The Contributors, the Partnership
and the REIT hereby agree that payment of the Downpayment Amount to the
Contributors or the Contributors' drawing on the Letter of Credit, as
applicable, shall be deemed to be fair and adequate, but not excessive,
liquidated damages based upon the following considerations which the
Contributors and the Partnership agree would constitute damages to the
Contributors for any default by the Partnership or the REIT but which are
impossible to quantify, to wit: (i) the removal of the Properties and the
ownership interests in the Existing Owners from the real estate market together
with the uncertainty of obtaining a new purchaser at the same or greater
purchase price; (ii) the expenses incurred by the Contributors, including (but
not by way of limitation) attorneys' fees, taxes, mortgage interest, and other
items incidental to the maintenance of the Properties until they are eventually
sold; and (iii) all other expenses incurred by the Contributors as a result of
the Partnership's default.

     In the event of such termination, the Partnership and the REIT shall
immediately return all due diligence material, reports and studies delivered to
the Partnership by the Contributors and/or the Existing Owners (without the
Partnership retaining copies thereof).

     Section 20.02. THE CONTRIBUTORS' DEFAULT. In the event any Contributor is
in default by reason of (i) the Contributors' inability to deliver the
certificate set forth in Section 11.01(c) hereof and the same cannot be cured in
accordance with the penultimate paragraph of Section 10 hereof and Section 23.08
hereof, as applicable, (ii) the misrepresentation or inaccuracy in, or breach
of, one or more representations and warranties contained in the certificate set
forth in Section 11.01(c) hereof, the failure of which to be true and correct in
all respects, individually or in the aggregate, causes a Material Adverse
Effect, which is not cured within the time frames set forth in the penultimate
paragraph of Section 10 hereof or Section 23.08 hereof, as applicable, or (iii)
such Contributor's failure or refusal to comply with any material term of this
Agreement for


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<PAGE>

more than ten (10) calendar days after receipt of written notice thereof has
been given to such Contributor, the Partnership's remedies shall include the
right to (a)(i) immediate return of the Downpayment Amount or the Letter of
Credit, as applicable, and the cancellation of this Agreement as to all
Properties for which a Closing shall not yet have occurred, or (ii) bring an
action to specifically enforce this Agreement to compel such Contributor to
perform the terms and conditions of this Agreement; and (b) take any other
action permitted by law.

                             SECTION 21: ASSIGNMENT

     Section 21.01. This Agreement and the REIT's and the Partnership's rights
hereunder may not be assigned by the Partnership without the prior written
consent of the Contributors except that (i) the REIT may transfer its rights and
obligations by operation of law to Keystone Property Trust, a wholly-owned
subsidiary of the REIT in connection with the merger of the REIT with and into
Keystone Property Trust, with Keystone Property Trust as the surviving entity
having a Declaration of Trust substantially in the form set forth as Appendix A
to the Proxy Statement of the REIT filed with the SEC on April 30, 1999, it
being understood that, upon the consummation of such merger, all references
herein and in the documents contemplated hereby to the REIT shall mean Keystone
Property Trust, as successor to the REIT, with appropriate revision hereto to
reflect the reorganization of the REIT from a Maryland corporation to a Maryland
real estate investment trust and (ii) the Partnership may assign its rights and
obligations to an Affiliate of the Partnership or the REIT which qualifies as a
partnership (or as a disregarded entity that is owned by an entity that
qualified as a partnership) for federal income tax purposes, provided that upon
any such assignment (x) the Partnership remains, together with such Affiliate,
fully liable and obligated hereunder, (y) the Partnership and the REIT continue
to be the issuers of the Equity and (z) such assignment does not and will not
adversely impact or effect any of the rights of the Contributors hereunder or
the bargain agreed to by the parties hereto and embodied hereby or by the
transactions contemplated hereby, in any material respect. Except as otherwise
set forth in Section 14.06, during the Contract Period, the Contributors may not
assign any or all of their rights hereunder without the consent of the
Partnership.

                     SECTION 22: 309 AND 409 KENNEDY DRIVE

     Section 22.01. A portion of the indebtedness which shall be assumed by the
Partnership at the Stage I Closing, relates to the Existing Mortgage encumbering
the 309 and 409 Kennedy Drive Properties. The Partnership hereby agrees that (i)
the RMOP Contributors shall pay up to $100,000 of any assumption fee, prepayment
fee or similar fee incurred in connection with the assumption of such Existing
Mortgages (it being expressly understood that the Partnership shall pay any
other costs and expenses relating to such assumption, including, without
limitation, the lender's attorneys fee and title premiums) and (ii) in
connection with the assumption of such Existing Mortgage, the Partnership shall
cause the Morris Contributors' existing guaranty of said indebtedness (the
"GUARANTY") to remain in place, pursuant to documentation reasonably acceptable
to the Morris Contributors.


                                       63
<PAGE>


     Section 22.02. The Partnership covenants and agrees that it shall keep the
309 and 409 Kennedy Drive Properties encumbered by either the Existing Mortgage
currently encumbering such Properties or, upon the maturity or repayment (other
than pursuant to required principal amortization, if any) of such Existing
Mortgage, by substitute indebtedness, which shall remain in place until the
earlier to occur of (i) the eighth (8th) anniversary of the Stage I Closing Date
and (ii) the date the Morris Contributors shall have disposed of 75% or more of
the Units the Morris Contributors shall have received as part of the Stage I
Consideration. In the event the Partnership shall refinance the Existing
Mortgage with respect to the 309 and 409 Kennedy Drive Properties prior to the
earlier to occur of (i) and (ii) above, the Partnership shall offer the Morris
Contributors the opportunity to guaranty a portion of such replacement
indebtedness pursuant to a guaranty in form and substance substantially similar
to the Guaranty. If the Partnership satisfies the Existing Mortgages (and any
replacement mortgage), then the Partnership shall offer the Morris Contributors
the opportunity to execute a "bottom guaranty," in form, amount and substance
substantially similar to the Guaranty, with respect to third-party indebtedness
of the Partnership.

                     SECTION 23: NON-BASKET REPRESENTATIONS

     Section 23.01. The RMOP Contributors jointly and severally represent and
warrant that, as of the Stage I Closing Date, RMOP shall not be a party to, or
have any liability in respect of, (i) any derivative contract, (ii) any
employment contract, (iii) any loan (including any loan or other obligation to
an Affiliate), other than the applicable Existing Mortgages or (iv) any
employment litigation matter brought against RMOP, as a defendant.

     Section 23.02. The RMOP Contributors jointly and severally represent and
warrant that, as of each Stage II Closing Date, no RMOP Sub shall be a party to,
or have any liability in respect of, (i) any derivative contract, (ii) any
employment contract, (iii) any loan (including any loan or other obligation to
an Affiliate), other than the applicable Existing Mortgages or (iv) any
employment litigation matter, brought against such RMOP Sub, as a defendant.

     Section 23.03. ROP represents and warrants that, as of the Stage III
Closing Date, no ROP Sub shall be a party to, or have any liability in respect
of, (i) any derivative contract, (ii) any employment contract, (iii) any loan
(including any loan or other obligation to an Affiliate), or (iv) any employment
litigation matter, brought against any ROP Sub, as a defendant.

     Section 23.04. (a) Upon the issuance of Units to the Equity Holders, the
Equity Holders shall become subject to, and shall be bound by, the terms and
provisions of the Partnership Agreement, including the terms of any power of
attorney contained therein, as the Partnership Agreement may be amended from
time to time in accordance with its terms.

     (b) Each Equity Holder understands the risks of, and other considerations
relating to, the acquisition of the Equity. Each Equity Holder, by reason of its
business and financial experience, together with the business and financial
experience of those persons, if any, retained by it to represent or advise it
with respect to its investment in the Equity, (i) has such knowledge,
sophistication and experience in financial and business matters and in making
investment


                                       64
<PAGE>

decisions of this type that it is capable of evaluating the merits and risks of
an investment in the Partnership or the REIT and of making an informed
investment decision, (ii) is capable of protecting its own interest or has
engaged representatives or advisors to assist it in protecting its interests and
(iii) is capable of bearing the economic risk of such investment.

     (c) Each Equity Holder understands, as of the date hereof, that an
investment in the Partnership or the REIT involves substantial risks. Each
Equity Holder has been given the opportunity to make a thorough investigation of
the proposed activities of the Partnership and has been furnished with materials
relating to the Partnership and the REIT and their proposed activities
(including, but not limited to, the Form 10-K of the REIT for the year ended
December 31, 1998, the Form 10-Q of the REIT for the quarter ending March 31,
1999 and all reports subsequently filed with the Securities and Exchange
Commission pursuant to Section 13 of the Securities Act of 1934). Each Equity
Holder has been afforded the opportunity to obtain any additional information
deemed necessary by such Equity Holder to verify the accuracy of any
representations made or information conveyed to such Equity Holder. The Equity
Holders confirm that all documents, records, and books pertaining to their
investment in the Partnership and the REIT and requested by each Equity Holder
have been made available or delivered to such Equity Holder. Each Equity Holder
has had an opportunity to ask questions of and receive answers from the
Partnership and the REIT, or from a person or persons acting on the
Partnership's or the REIT's behalf, concerning the terms and conditions of this
investment.

     (d) The Equity to be issued to the Equity Holders will be acquired by the
Equity Holders for their own accounts for investment only and not with a view
to, or with any intention of, a distribution or resale thereof, in whole or in
part, or the grant of any participation therein, without prejudice, however, to
the Equity Holders' right (subject to the other terms of this Agreement) at all
times to sell or otherwise dispose of all or any part of its Equity under an
exemption from such registration available under the Securities Act of 1933, as
amended (the "SECURITIES ACT"), and applicable state securities laws, and
subject, nevertheless, to the disposition of its assets being at all times
within its control. No Equity Holder was formed for the specific purpose of
acquiring an interest in the Partnership or the REIT.

     (e) The Equity Holders acknowledge that (i) the Equity to be issued to the
Equity Holders have not been registered under the Securities Act or state
securities laws by reason of a specific exemption or exemptions from
registration under the Securities Act and applicable state securities laws and,
if the Equity is represented by certificates, such certificates may bear a
legend to such effect, (ii) the REIT's and the Partnership's reliance on such
exemptions is predicated in part on the accuracy and completeness of the
representations and warranties of the Equity Holders contained herein, (iii) the
Equity, therefore, cannot be resold unless registered under the Securities Act
and applicable state securities laws, or unless an exemption from registration
is available, (iv) there is no public market for the Equity, and (v) the
Partnership has no obligation or intention to register the Equity for resale
under the Securities Act or any state securities laws or to take any action that
would make available any exemption from the registration requirements of such
laws. The Equity Holders hereby acknowledge that because of the restrictions on
transfer or assignment of the Equity to be issued hereunder which are set forth


                                       65
<PAGE>


herein, the Equity Holders may have to bear the economic risk of the investment
commitment evidenced by this Agreement and any Equity acquired hereby for an
indefinite period of time.

     (f) Each Equity Holder (other than the Morris Trusts) is an accredited
investor as defined in Regulation D under the Securities Act.

     (g) Each Equity Holder acknowledges that the offer and sale of the REIT
Common Stock, Preferred Stock or Units, as applicable, to it has not been
accomplished by any form of general solicitation or general advertising,
including, but not limited to, (i) any advertisement, article, notice or other
communication published in any newspaper, magazine or similar media, or
broadcast over television or radio or (ii) any seminar or meeting whose
attendees have been invited by any general solicitation or general advertising.

     (h) In addition to the legend required by Section 6.2.9 of the REIT's
Amended and Restated Articles of Incorporation, dated as of December 12, 1997
(the "CHARTER") and the statements required by Section 7.1 of the REIT's
By-Laws, as amended on December 12, 1997, to the extent applicable, any
certificate or other document issued in respect of any Equity shall be endorsed
with the legends set forth below, and the undersigned covenants that, except to
the extent such restrictions are waived by the REIT, the undersigned shall not
transfer any Equity without complying with the restrictions on transfer
described in such legends:

     (i) THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR
REGISTERED OR QUALIFIED UNDER THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE
SOLD, TRANSFERRED, ASSIGNED, PLEDGED, OR HYPOTHECATED (1) ABSENT AN EFFECTIVE
REGISTRATION THEREOF UNDER SUCH ACT, (2) ABSENT AN OPINION OF COUNSEL, WHICH
OPINION IS REASONABLY SATISFACTORY IN FORM AND SUBSTANCE TO THE COMPANY AND ITS
COUNSEL, TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR
SUCH STATES OR THAT SUCH TRANSACTION COMPLIES WITH THE RULES PROMULGATED BY THE
SECURITIES AND EXCHANGE COMMISSION UNDER SAID ACT OR SUCH STATES OR, (3) EXCEPT
IN A TRANSACTION IN COMPLIANCE WITH RULE 144 UNDER THE SECURITIES ACT.

     (j) Each Equity Holder acknowledges, agrees and is aware that: (i) no
federal or state agency has passed upon the Units, the REIT Common Stock and the
Preferred Stock or made any finding or determination as to the fairness of this
investment nor any recommendation or endorsement of the investment; (ii) there
are substantial risks of loss of investment incidental to the purchase of the
Units, the REIT Common Stock and the Preferred Stock; and (iii) neither the
REIT, the Partnership nor their subsidiaries nor any of their Affiliates or
representatives has provided any Equity Holder with any investment, legal,
regulatory or accounting advice with respect to the investment in or ownership
of the Units, the REIT Common Stock and the Preferred Stock; provided, however,
that the REIT and the Partnership confirm the representations, warranties,
covenants and other agreements of the REIT and the Partnership.



                                       66
<PAGE>



     (k) All negotiations relative to this Agreement and the transactions
contemplated hereby have been carried out by each Equity Holder directly with
the REIT and the Partnership without the intervention of any person on behalf of
Equity Holder in such manner as to give rise to any valid claim by any person
against the REIT and the Partnership for a finder's fee, brokerage commission or
similar payment.

     Section 23.05. (a) The RMOP Contributors jointly and severally represent
that (i) each of RMIIGP and RMIT is a general partner of RMOP and owns the
related partnership interests in RMOP set forth on EXHIBIT A, (ii) RMIIGP's
interest in RMOP is not subject to preemptive rights and is owned free and clear
of any Lien, (iii) the RMOP Limited Partnership Agreement is in full force and
effect and has not been amended or modified since October 27, 1998, (iv) there
are no outstanding options, warrants or other rights to subscribe for, or
purchase any interests in RMOP, (v) all the issued and outstanding partnership
interests in RMOP have been duly authorized for issuance by RMOP and are validly
issued and fully paid and have been offered and sold or exchanged in compliance
with all applicable laws (including, without limitation, federal and state
securities laws), (vi) the interests set forth on EXHIBIT A collectively
represent 100% of the issued and outstanding partnership interests in RMOP, and
(vii) Schedule 32.1 is a true and correct list of all the employees of RMOP who
are employed by RMOP pursuant to written or oral employment agreements.

     (b) RMIT represents that (i) its interest in RMOP is not subject to
preemptive rights, and (ii) RMIT has legal and beneficial title to one hundred
percent (100%) of its interest in RMOP, free and clear of all Liens.

     (c) The Morris Contributors jointly and severally represent that (i) each
Morris Contributors is a partner in RMOP and owns the percentage interest in
RMOP set forth in EXHIBIT A attached hereto, (ii) no Morris Contributor's
interest in RMOP is subject to any preemptive rights, and (iii) each Morris
Contributor has legal and beneficial title to one hundred percent (100%) of its
respective interest in RMOP, which will be free and clear of all Liens at the
Stage I Closing.

     Section 23.06. (a) The RMOP Contributors jointly and severally represent
that (i) the operating agreements with respect to each of the RMOP Subs are in
full force and effect and have never been amended or modified, (ii) the
interests of the RMOP Contributors (other than RMIIGP) in the RMOP Subs are not
subject to preemptive rights, (iii) the interests set forth on EXHIBIT A
collectively represent 100% of the issued and outstanding partnership interests
in each of the RMOP Subs, (iv) there are no outstanding options, warrants or
other rights to subscribe for or purchase any interests in any of the RMOP Subs,
(v) all the issued and outstanding membership interests in each of the RMOP Subs
have been duly authorized for issuance by each of the RMOP Subs and are validly
issued and fully paid and have been offered and sold or exchanged in compliance
with all applicable laws (including, without limitation, federal and state
securities laws), (vi) the interests set forth on EXHIBIT A collectively
represent 100% of the issued and outstanding partnership interests in each of
the RMOP Subs and (vii) Schedule 32.2 is

                                       67
<PAGE>


a true and correct list of all the employees of the RMOP Subs who are
employed by the RMOP Subs pursuant to written or oral employment agreements.

     (b) RMIT represents that (i) it owns the percentage interests in each of
the RMOP Subs set forth on EXHIBIT A hereto, (ii) RMIT's interest in each of the
RMOP Subs is not subject to preemptive rights, and (iii) RMIT will have, legal
and beneficial title to one hundred percent (100%) of its interest in each of
the RMOP Subs, free and clear of all Liens.

     (c) The Morris Contributors jointly and severally represent that (i) each
Morris Contributor owns the percentage interest in each of the RMOP Subs set
forth on Exhibit A hereto, (ii) no Morris Contributor's interest in any of the
RMOP Subs is subject to preemptive rights, and (iii) each Morris Contributor
has, legal and beneficial title to one hundred percent (100%) of its interest in
each of the RMOP Subs, which will be free and clear of all Liens at the Stage II
Closing.

     Section 23.07. (a) ROP represents that, subject to Section 3.01(e) hereof,
(i) the operating agreements with respect to each of the ROP Subs are in full
force and effect and have not been amended or modified, (ii) there are no
outstanding options, warrants or other rights to subscribe for or purchase any
interests in the ROP Subs, (iii) all the issued and outstanding membership
interests in each of the ROP Subs have been duly authorized for issuance by such
ROP Sub and are validly issued and fully paid and have been offered and sold or
exchanged in compliance with all applicable laws (including, without limitation,
federal and state securities laws), (iv) ROP is the managing member of each of
the ROP Subs, (v) ROP's interest in each of the ROP Subs will not be subject to
any preemptive rights at the Stage III Closing, (vi) ROP will have, legal and
beneficial title to one hundred percent (100%) of its interest in each of the
ROP Subs, free and clear of all Liens on the Stage III Closing Date, and (vii)
Schedule 32.3 is a true and correct list of all the employees of the ROP Subs
who are employed by the ROP Subs pursuant to written or oral employment
agreements.

     Section 23.08. If, prior to any Closing Date, the Partnership shall
discover that any of the representations contained in this Section 23 are likely
to be false as of such Closing Date and, as a result of such falsity, the
Partnership shall believe that it will likely suffer a Loss in the event that it
proceeds with such Closing, the Partnership shall give the Contributors with
respect to such Closing notice of such falsity and the Partnership's estimation
of the amount of the potential Loss. Thereafter, the Contributors who made such
false representations and/or any other Contributor shall have the right to
correct such falsity within twenty (20) Business Days of its receipt of such
notice or, at its option, indemnify the Partnership for any loss, cost, or
expense incurred in connection with such falsity; provided, however, that in the
event the Contributor who made such false representation and/or any other
Contributor shall be unable or unwilling to cure such falsity or provide such
indemnification, the Contributor who made such false representations and/or any
other Contributor may, upon written notice to the Partnership, elect to reduce
the Consideration due to such Contributors with respect to such Closing by an
amount equal to potential Loss, as reasonably determined by both the Partnership
and such Contributor. If one or more Contributors do not elect to reduce the
Consideration or provide such


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indemnification as aforesaid, the Partnership shall have the right to terminate
this Agreement with respect to all Properties for which a Closing shall not yet
have occurred.

     The representations set forth in Section 23.01, Section 23.02 and Section
23.03 shall survive the applicable Closing for twelve (12) months and the
balance of the representations set forth in this Section 23 shall survive the
applicable Closing until the expiration of all applicable statutes of limitation
(including all periods of extension, whether automatic or permissive); provided,
however, that to the extent that any claim for indemnification is made under
this Agreement prior to the expiration of the survival period relating to such
representation and warranty, such survival period will be extended as it relates
to such related claims until the related claim for indemnification has been
satisfied or otherwise resolved as provided in Section 35.

                         SECTION 24: FURTHER ASSURANCES

     Section 24.01. The Partnership, the REIT and the Contributors each agree to
execute and deliver to the other such further documents or instruments as may be
reasonable and necessary in furtherance of the performance of the terms,
covenants and conditions of this Agreement. This paragraph shall survive the
Closing Date.

                           SECTION 25: MISCELLANEOUS

     Section 25.01. In connection with the transfer of the equity interests in
the Existing Owners to the Partnership pursuant to this Agreement, the
Partnership agrees to pay the fees and disbursements of the title company for
searches, surveys, title reports and title insurance and recording fees.

     Section 25.02. Subject to Section 21 hereof, this Agreement shall be
binding upon and shall inure to the benefit of the Contributors, the Partnership
and the REIT and their respective successors and assigns.

     Section 25.03. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York. This Agreement shall be
construed without regard to any presumption or other rule requiring construction
against the party causing this Agreement to be drafted. If any words or phrases
in this Agreement shall have been stricken out or otherwise eliminated, whether
or not any other words or phrases have been added, this Agreement shall be
construed as if the words or phrases so stricken out or otherwise eliminated
were never included in this Agreement and no implication or inference shall be
drawn from the fact that said words or phrases were so stricken out or otherwise
eliminated. All terms and words used in this Agreement, regardless of the number
or gender in which they are used, shall be deemed to include any other number
and any other gender as the context may require.

     Section 25.04. The headings of the several Sections contained in this
Agreement are inserted only as a matter of convenience and for reference and in
no way define, limit or describe the scope of this Agreement or the intent of
any provision thereof.



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<PAGE>



     Section 25.05. The invalidity or unenforceability of any provision of this
Agreement shall not affect or impair any other provision of this Agreement.

     Section 25.06. This Agreement contains the entire agreement between the
Contributors, the REIT and the Partnership, and any and all prior understandings
and dealings heretofore had are merged herein and any agreement hereafter made
shall be ineffective to change, modify or discharge this Agreement in whole or
in part unless such agreement hereafter made is in writing and signed by each of
the Contributors, the REIT and the Partnership.

     Section 25.07. Neither the Partnership nor the REIT shall have the right to
record this Agreement or a memorandum hereof. If the Partnership or the REIT
shall so record this Agreement or a memorandum, the Partnership and the REIT
shall be in default of the terms and conditions of this Agreement.

     Section 25.08. This Agreement may be executed in counterparts. The
signatures of the parties who sign different counterparts of this Agreement or
any of the instruments executed to effectuate the purposes of this Agreement
shall have the same effect as if those parties had signed the same counterparts
of this Agreement or of any such instrument.

     Section 25.09. The Contributors shall use good faith efforts to obtain
non-disturbance agreements from the Tenants set forth on SCHEDULE 11 attached
hereto, provided, however that the receipt of such non-disturbance agreements
shall not be a condition precedent to any Closing.

     Section 25.10. The terms and provisions of this Agreement shall survive the
respective Closing Dates, unless otherwise noted herein.

     Section 25.11. For purposes of this Agreement, to the best of any RMOP
Contributor's or ROP's knowledge shall be deemed to include the knowledge of the
applicable Existing Owners.

                            SECTION 26: ESCROW AGENT

     Section 26.01. The Contributors and the Partnership hereby designate the
Escrow Agent as the Person to receive and hold the Downpayment Amount or the
Letter of Credit, as applicable, delivered herewith by the Partnership in
accordance with Section 3 hereof, and Escrow Agent agrees to act as such Escrow
Agent subject to the provisions of this Section 26.

     Section 26.02. Any Downpayment Amount remitted to Escrow Agent shall be
deposited in an interest bearing money market account at any federally insured
banking institution. All interest on the Downpayment Amount or the remaining
portion thereof shall constitute part of the Downpayment Amount.

     Section 26.03. On receipt by Escrow Agent of a statement executed by the
Contributors and the Partnership that the Stage III Closing has occurred, the
Escrow Agent shall promptly


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<PAGE>

deliver any Letter of Credit or the Downpayment Amount plus any interest earned
thereon, as applicable, to the Partnership.

     Section 26.04. On receipt by Escrow Agent of a statement executed by the
Partnership prior to, on or after the Stage III Closing Date stating that the
Closing of the transfer of the Contributors' interests in each of the Existing
Owners has not occurred because of a default by any Contributor under this
Agreement or because of any Contributor's inability to convey its interest in an
Existing Owner in accordance with the provisions of this Agreement or because
any contingency contained in this Agreement has not been satisfied or waived,
Escrow Agent shall, within ten (10) Business Days, deliver a copy of said
statement to the Contributors and return such Downpayment Amount plus any
interest earned thereon or Letter of Credit, as applicable, to the Partnership
on the tenth (10th) Business Day after receipt by the Contributors of said
statement unless Escrow Agent, prior to such return, receives from the
Contributors a statement contesting the accuracy of the Partnership's statement
and demanding retention of said Downpayment Amount or Letter of Credit, as
applicable, by Escrow Agent.

     Section 26.05. On receipt by Escrow Agent of a statement executed by the
Contributors prior to, on or after the Stage III Closing Date that the Closing
of the transfer of the Contributors' interests in each of the Existing Owners
has not occurred because of a default by the Partnership under this Agreement,
Escrow Agent shall within ten (10) Business Days deliver said statement to the
Partnership and deliver any Downpayment Amount plus any interest earned thereon
or Letter of Credit, as applicable, to the Contributors on the tenth (10th)
Business Day after receipt by the Partnership of such statement, unless Escrow
Agent, prior to such delivery, receives from the Partnership a statement
contesting the accuracy of the Contributors' statement and demanding retention
of said Downpayment Amount or Letter of Credit by Escrow Agent.

     Section 26.06. On receipt by Escrow Agent of a statement from the
Contributors or the Partnership, as the case may be, under subparagraph 26.04 or
26.05 above, Escrow Agent shall retain the Downpayment Amount plus any interest
earned thereon or Letter of Credit, as applicable, and thereafter deliver the
same to either the Contributors or the Partnership as the Contributors or the
Partnership may direct by a statement executed by them both, provided if there
is any dispute with respect to the Downpayment Amount or Letter of Credit, as
applicable, Escrow Agent may immediately and with notice to the Contributing
Party and the Partnership, surrender said Downpayment Amount or Letter of
Credit, as applicable, to a court of competent jurisdiction for such disposition
as may be directed by such court.

     Section 26.07. Upon delivery of the Downpayment Amount or Letter of Credit,
as applicable to either the Partnership, the Contributors or a court of
competent jurisdiction under and pursuant to the provisions of this Section,
Escrow Agent shall be relieved of all liability, responsibility or obligation
with respect to or arising out of the Downpayment Amount or Letter of Credit, as
applicable, and any and all of its obligations arising therefrom.

     Section 26.08. The Escrow Agent shall not be liable for any error of
judgment or for any act done or omitted by it in good faith or for anything
which it may in good faith do or refrain


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<PAGE>


from doing in connection herewith or for any negligence other than its bad
faith, willful misconduct or gross negligence, nor shall the Escrow Agent be
answerable for the default or misconduct of its agents, attorneys or employees
if they be selected with reasonable care. The Escrow Agent is authorized to act
upon any document believed by it to be genuine and to be signed by the proper
party or parties and will incur no liability in so acting.

     Section 26.09. The Escrow Agent has executed this Agreement for the sole
purpose of agreeing to act as such in accordance with the terms of this
Agreement.

     Section 26.10. Notwithstanding anything contained herein to the contrary,
in the event (i) the Stage III Closing shall not have occurred and the
Partnership shall not provide a replacement Letter of Credit prior to the date
which is thirty (30) days prior to the expiration date of the existing Letter of
Credit or (ii) the Escrow Agent shall receive a statement from one or more of
the Contributors or the Partnership, as the case may be, under Subparagraph
26.04 or 26.05 above and a replacement Letter of Credit is not provided to the
Contributor prior to the date which is thirty (30) days prior to the expiration
date of the existing Letter of Credit, the Escrow Agent shall draw on the Letter
of Credit and hold all funds received in the manner set forth with respect to
Downpayment Amount.

                            SECTION 27: ACCOUNTANTS

     Section 27.01. For the period continuing through the first anniversary of
the applicable Closing Date, the applicable Contributors shall, from time to
time, upon reasonable advance written notice from the Partnership, provide to
the Partnership and its representatives, access to all financial and other
information pertaining to the period of Contributor's direct or indirect
ownership of the applicable Properties, which information is relevant and
reasonably necessary, in the opinion of the Partnership's outside, third party
accountants (the "ACCOUNTANTS") to enable the Partnership and the Accountants to
prepare financial statements in compliance with any and all of (a) Rule 3-05 or
Rule 3-14 of Regulation S-X of the Securities and Exchange Commission, as
applicable to the Partnership; (b) any other rule issued by the Securities and
Exchange Commission and applicable to the Partnership; and (c) any registration
statement, report or disclosure statement filed with the Securities and Exchange
Commission by, or on behalf of the Partnership; and (ii) a representation
letter, in form specified by, or otherwise satisfactory to, the Accountants,
signed by the individuals responsible for such Contributor's financial
reporting, as prescribed by generally accepted auditing standards promulgated by
the Auditing Standards Division of the American Institute of Certified Public
Accountants, which representation letter may be required by the Accountants in
order to render an opinion concerning the Contributor's financial statements.

                    SECTION 28: CONFIDENTIALITY/PUBLICATION

     Section 28.01. Except as may be required by law or as may be necessary to
effectuate the contemplated transaction or except as set forth below, each of
the Contributors, the REIT and the Partnership, individually and on behalf of
their representatives, agree that they and their respective representatives
shall hold both the terms and conditions of this Agreement and its



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existence as confidential information and will not disclose such terms,
conditions or existence or the fact that the negotiations are taking place, to
any third party without the other's consent; provided, however, that the parties
hereto may share such information with their advisors and prospective lenders or
investors (it being understood that any such party shall send an advance copy of
any announcement to the other parties) and that ROP may share any such
information with Matrix. This Section shall constitute a binding and enforceable
agreement under applicable law.

                                SECTION 29: ISRA

     Section 29.01. The Contributors shall be responsible, with respect to the
Property located in the State of New Jersey, for compliance with the Industrial
Site Recovery Act, N.J.S.A. 13:1K-6 ET. SEQ. ("ISRA"). The Contributors shall
use commercially reasonable efforts to obtain, as appropriate, from the New
Jersey Department of Environmental Protection ("NJDEP"): (i) a Letter of
Nonapplicability ("LNA"); (ii) an approval of a Negative Declaration ("NEGATIVE
DECLARATION APPROVAL"); (iii) a no further action letter; (iv) an approval of a
de minimus quantity exemption application; (v) an approval of a remediation
agreement; or (vi) a Remediation in Progress Waiver ("REMEDIATION IN PROGRESS
WAIVER," and together with LNA, Negative Declaration Approval and the items set
forth in (iii), (iv) and (v), "EVIDENCE OF ISRA COMPLIANCE"), in all cases,
dated not earlier than ninety (90) days before the date of the applicable
Closing. The Contributors shall provide the Partnership copies of all filings
and submissions made pursuant to ISRA, concurrently with the delivery of such
filings or submissions to NJDEP and shall also provide the Partnership with
copies of all correspondence and responses received from NJDEP promptly after
receipt thereof.

     Section 29.02. In the event the RMOP Contributors shall be unable to obtain
Evidence of ISRA Compliance with respect to any Stage I Property (such failure
being referred to herein as a "STAGE I ISRA DEFECT"), then the Stage I Closing
Date shall be postponed (for a period not to exceed ninety (90) days) until such
time as a Stage I ISRA Defect no longer exists. Thereafter, in the event the
RMOP Contributors shall obtain Evidence of ISRA Compliance with respect to each
of the Stage I Properties, such that a Stage I ISRA Defect shall no longer
exist, prior to the termination of such ninety (90) day period, the Partnership,
the REIT, and the RMOP Contributors shall proceed with the Stage I Closing. In
the event the RMOP Contributors shall be unable to obtain Evidence of ISRA
Compliance with respect to each of the Stage I Properties such that a Stage I
ISRA Defect shall no longer exist, prior to the termination of such ninety (90)
day period, the Partnership and the RMOP Contributors shall have the right to
terminate this Agreement, whereupon, no party shall have any further obligations
hereunder.

     Section 29.03. In the event the RMOP Contributors (other than RMIIGP) or
ROP, as applicable, shall be unable to obtain Evidence of ISRA Compliance with
respect to one or more of the Stage II or Stage III Properties prior to April
30, 2000, then the applicable Contributors for those Properties for which
Evidence of ISRA Compliance shall have been obtained shall proceed with the
applicable Closing without a transfer of the membership interest in the
applicable Existing Owner for whose Property Evidence of ISRA Compliance shall
not have been obtained,


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<PAGE>


with an appropriate adjustment in the applicable Consideration. Thereafter, in
the event Evidence of ISRA Compliance with respect to any such Property is
obtained within ninety (90) days after the occurrence of the final Stage II
Closing or the Stage III Closing, as applicable, the applicable Contributors
shall contribute and transfer to the Partnership, and in consideration of such
contribution, the Partnership shall accept from such Contributors, subject to
and in accordance with the terms, provisions, covenants and conditions set forth
in this Agreement, all of the membership interests in the applicable Existing
Owner, and the Partnership shall deliver or cause the applicable portion of the
Consideration to be delivered to such Contributors. In the event the applicable
Contributors shall be unable to obtain Evidence of ISRA Compliance within ninety
(90) days after the occurrence of the applicable Closing, each of the
Partnership and the applicable Contributors shall have the right to terminate
this Agreement with respect to such Property for which Evidence of ISRA
Compliance shall not have been obtained, whereupon, neither such party shall
have any further rights hereunder with respect to such Property only.

     Section 29.04. (a) At each Closing, for each Property which is the subject
of such Closing and for which a Remediation in Progress Waiver has been obtained
or a remediation agreement with NJDEP has been entered into, the applicable
Contributors shall use commercially reasonable efforts to deliver to the
Partnership:

          (i) true, correct and complete copies of all documents, reports and
     correspondence in the possession of such Contributors relating to (x)
     indemnification obligations by or in favor of any Contributor with respect
     to the environmental condition of such Property and (y) remediation
     activities conducted at such Properties, including, without limitation,
     copies of all submittals delivered to NJDEP; and

          (ii) from each Person obligated to provide indemnification or perform
     remediation activities in favor of any Contributor or Existing Owner with
     respect to the environmental condition of such Property, such Person's
     acknowledgment and certification that the agreements by which such Person
     provides indemnification or performs remediation activities shall remain in
     full force and effect and shall run in favor of and be enforceable by the
     Partnership following its acquisition of the applicable Contributed
     Interests.

     (b) The Partnership and the REIT acknowledge that the receipt of the
materials set forth in sub-section (a) above, shall not be a condition precedent
to any Closing.

     Section 29.05. The parties acknowledge that the 22 Madison Property is
subject to a remediation agreement (the "22 MADISON REMEDIATION AGREEMENT")
between RMOP and NJDEP. During the Contract Period, the Partnership and the REIT
agree to execute (i) an application for an amendment to the 22 Madison
Remediation Agreement providing for (x) the Partnership's assumption of the
responsibility of conducting and/or continuing the environmental investigation
and, if necessary, the cleanup of the 22 Madison Property and (y) the release of
RMOP from its obligations under the 22 Madison Remediation Agreement and (ii)
any other documents as may be required by NJDEP with respect to the Madison
Property. In the event


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<PAGE>


NJDEP shall permit the amendment set forth in clause (i) above, then at the
Stage I Closing, the Partnership shall (1) execute an amendment to the 22
Madison Remediation Agreement with respect to the same and (2) post a
remediation funding source in an amount required by NJDEP at the Stage I
Closing.

                          SECTION 30: SALE OF PROPERTY

     Section 30.01. (a) Without the prior written consent of each of ROP and the
Morris Contributors, the Partnership shall not sell (voluntarily or
involuntarily), exchange or otherwise dispose of all or any portion of any
Property set forth in SCHEDULE 12.1 hereto until the earlier to occur of (i) the
date the Contributors with respect to such Property shall have disposed of or
converted in excess of 75% of the Units they shall have received as part of the
Consideration with respect to such Property and (ii) the five (5) year
anniversary of the Stage I Closing Date (with respect to Nixon Park, the Stage
II Closing Date), in a transaction which results in the recognition of taxable
gain to the Partnership and the allocation of any portion of such taxable gain
in excess of the corresponding amount of "book" gain under Section 704(c) of the
Code (the "SECTION 704(C) GAIN") to one or more of such Contributors.

     (b) Without the prior written consent of ROP, the Partnership shall not
sell (voluntarily or involuntarily), exchange or otherwise dispose of all or any
portion of any Property set forth in SCHEDULE 12.2 hereto until the earlier to
occur of (i) the date ROP shall have disposed of or converted in excess of 75%
of the Units it shall have received as part of the Consideration with respect to
such Property and (ii) the five (5) year anniversary of the Stage III Closing
Date, in a transaction which results in the recognition of taxable gain to the
Partnership and the allocation of Section 704(c) Gain to ROP.

     (c) (i) Without the prior written consent of the Morris Contributors, the
Partnership shall not sell (voluntarily or involuntarily), exchange or otherwise
dispose of all or any portion of any Property set forth in SCHEDULE 13 hereto
until the earlier to occur of (x) the date the Morris Contributors shall have
disposed of or converted in excess of 75% of the Units they shall have received
as part of the Consideration with respect to such Property and (y) the eight (8)
year anniversary of the Stage I Closing Date, in a transaction which results in
the recognition of taxable gain to the Partnership and the allocation of Section
704(c) Gain to one or more of the Morris Contributors.

     (ii) The Partnership hereby agrees that if, at any time during the three
(3) year period immediately following the eight (8) year period described in
clause (i) above, the Partnership desires to sell any of the Properties
described in SCHEDULE 13 attached hereto, the Partnership shall use commercially
reasonable efforts in cooperation with the Morris Contributors to do so by way
of a tax-free exchange (including, without limitation, an exchange pursuant to
Section 1031 of the Code) or other manner that defers or reduces the recognition
of Section 704(c) Gain; provided, however, that the Partnership shall not be
obligated to use such commercially reasonable efforts in connection with (x) a
sale of all or substantially all of its portfolio of


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<PAGE>


industrial properties located within the State of New Jersey as a unit or (y)
sales resulting from a decision by the REIT to dispose of the Partnership's
assets to raise capital.

     (iii) Within thirty (30) Business Days after the sale, exchange or other
disposition of any Property in violation of the restrictions set forth in
Section 30.01, the Partnership shall notify each Morris Contributor in writing
of such disposition and of the approximate sales price or other amount realized
by the Partnership for federal income tax purposes in connection therewith.
Within thirty (30) Business Days after its receipt of such notice, each Morris
Contributor shall notify the Partnership in writing if it elects to receive the
Indemnity Remedy and Loan Remedy or, alternatively, the Modified Loan Remedy
under Section 30.02 with respect to such disposition. Failure by a Morris
Contributor to make such an election shall be deemed to be an election by such
Morris Contributor to receive the Indemnity Remedy and Loan Remedy with respect
to such disposition.

     Section 30.02. Nothing contained in Section 30.01 shall prohibit the
Partnership from selling, exchanging (including, without limitation, an exchange
pursuant to Section 1031 or 1033 of the Code) or otherwise disposing of any
Property in violation of the restrictions set forth therein, in which case the
Partnership shall deliver to each Contributor, by April 1 of the year following
the year in which such violation occurs, either (A) its respective Indemnity
Remedy and Loan Remedy or (B) in the case of each Morris Contributor which has
elected under Section 30.01(c)(iii) to receive the Modified Loan Remedy with
respect to such disposition, its respective Modified Loan Remedy. The "INDEMNITY
REMEDY" shall mean, for any Contributor with respect to a Property disposed of,
a payment of (i)(x) an amount equal to the Indemnity Percentage multiplied by
any federal and state income tax liability suffered by it with respect to any
Section 704(c) Gain allocated to it with respect to such disposition (the "TAX
LIABILITY") plus (y) an additional amount such that after payment by the
affected Contributor of all taxes on amounts received under the Indemnity
Remedy, the affected Contributor retains an amount equal to the Indemnity
Percentage multiplied by the Tax Liability or (ii) if less, in the case of ROP,
the Maximum ROP Payment. The "INDEMNITY PERCENTAGE" shall be 100% for
dispositions that occur prior to the one (1) year anniversary of the Closing
Date with respect to such Property and shall decline in equal annual increments
for dispositions that occur after each successive anniversary of such Closing
Date. Such increments shall be twenty (20) percentage points with respect to any
Property set forth in Schedule 12.1 or Schedule 12.2 hereto and shall be
twelve-and-one-half (12.5) percentage points with respect to any Property set
forth in Schedule 13 hereto. The "LOAN REMEDY" shall be an interest-free loan in
the amount by which the Tax Liability exceeds the amount described in clause
(i)(x) of the definition of the Indemnity Remedy. The "MODIFIED LOAN REMEDY"
shall be, for any Morris Contributor with respect to a Property disposed of, an
interest-free loan in the amount equal to the federal and state income tax
liability suffered by such Morris Contributor with respect to any Section 704(c)
Gain allocated to it with respect to such disposition. Any loan made pursuant to
the Loan Remedy or the Modified Loan Remedy shall be repayable in full by the
relevant Contributor on April 15 of the year following the year in which the
five (5) year or eight (8) year anniversary of the Closing Date applicable under
Section 30.01 with respect to the Property disposed of occurs. If the amount of
Section 704(c) Gain actually allocated to the Contributor shall differ from the
amount projected


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<PAGE>


on April 1 of the year following the year in which the violation of the
restriction set forth in Section 30.01 occurs, the amount paid under the
Indemnity Remedy and the amount loaned under the Loan Remedy or Modified Loan
Remedy shall thereupon be correspondingly adjusted by means of an additional
payment and loan or a partial refund and repayment of loan, as the case may be.
The "MAXIMUM ROP PAYMENT" shall mean the amount that can be paid to ROP without
causing RA to fail to meet the requirements of Sections 856(c)(2) or (3) of the
Code determined as if such amount would constitute income not described in
Sections 856(c)(2)(A)-(H) and 856(c)(3)(A)-(I) of the Code, as determined by
independent accountants of RA.

     For purposes of the foregoing:

     (a) Except as provided in paragraph (d) below, the federal income tax
liability suffered by ROP with respect to any Section 704(c) Gain allocated to
it shall be the sum of the RA Tax Liability and the LP Tax Liability. The "RA
TAX LIABILITY" shall be the amount of such Section 704(c) Gain allocable by ROP
to RA (the "RA SHARE") multiplied by the highest marginal rate of tax applicable
to corporations for federal income tax purposes, with respect to the character
of such Section 704(c) Gain, for the taxable year in which such Section 704(c)
Gain is recognized (the "GAIN YEAR"). The "LP TAX LIABILITY" shall be (i) the
excess of the amount of such Section 704(c) Gain allocated to ROP over the RA
Share multiplied by (ii) the highest marginal rate of tax applicable to
individuals for federal income tax purposes, with respect to the character of
such Section 704(c) Gain, for the Gain Year. The foregoing principles shall also
apply in determining the federal income tax liability suffered by ROP with
respect to any amount paid under the Indemnity Remedy (an "INDEMNITY PAYMENT").

     (b) The federal income tax liability suffered by a Morris Contributor with
respect to any Section 704(c) Gain allocated to it shall be the amount of such
Section 704(c) Gain multiplied by the highest marginal rate of tax applicable to
individuals for federal income tax purposes, with respect to the character of
such Section 704(c) Gain, for the Gain Year. The foregoing principles shall also
apply in determining the federal income tax liability suffered by a Morris
Contributor with respect to any Indemnity Payment paid to it.

     (c) The state income tax liability suffered by ROP or by a Morris
Contributor with respect to any Section 704(c) Gain allocated to it or any
Indemnity Payment paid to it shall be calculated based on the principles
applicable to the calculation of federal income tax liability set forth in
paragraphs (a) and (b) above, as applicable, provided that (i) the highest
marginal rate of tax applicable to corporations for New Jersey corporation
business tax purposes (for New York corporation franchise tax purposes in the
case of the Mt. Ebo Property) shall be used in calculating the RA Tax Liability,
(ii) the highest marginal rate of tax applicable to individuals for New Jersey
gross income tax purposes shall be used in calculating the LP Tax Liability (for
New York personal income tax purposes in the case of the Mt. Ebo Property) and
in calculating the income tax liability suffered by the Morris Contributors and
(iii) so as to take into account the deductibility of state income taxes for
federal income tax purposes, the rates described in clauses (i) and (ii) above,
as applicable, shall be multiplied by the excess of one over the rate applicable
under paragraph (a) or (b) for federal income tax purposes.


                                       77
<PAGE>


     (d) Notwithstanding the provisions of paragraph (a) above, to the extent
that federal income tax is imposed on the RA Share as a result of the
disposition in violation of the restrictions set forth in Section 30.01 of a
Property under significant construction on the Stage I Closing Date on the basis
that such Property was property described in Section 1221(1) of the Code, the
Partnership shall, in lieu of providing to ROP the Indemnity Remedy and the Loan
Remedy with respect to the RA Share, pay to ROP (i)(x) an amount equal to the RA
Share plus (y) an additional amount such that after payment by RA of all taxes
on amounts received under this paragraph (d) (such taxes calculated on the basis
that the federal income tax rate applicable to amounts received under this
paragraph (d) shall be the highest marginal rate of tax applicable to
corporations for federal income tax purposes for the taxable year in which such
amounts are received and on the basis that all amounts paid to ROP under this
paragraph (d) will be distributable to RA and cause corresponding allocations to
RA), RA retains an amount equal to the RA Share or (ii) if less, the Maximum ROP
Payment.

     (e) In the event that a loan shall be made to any Morris Contributor as a
Modified Loan Remedy with respect to the disposition of a Property, if such
Morris Contributor shall die prior to the five (5) year or eight (8) year
anniversary date applicable with respect to such Property under paragraph (a) or
(c) above, such loan shall thereupon be discharged without any payment and the
Partnership shall pay to the estate of such Morris Contributor on April 1 of the
year following the year in which such death occurs (i) the amount of any federal
and state income taxes suffered by such Morris Contributor or estate with
respect to such discharge of the loan plus (ii) an additional amount such that
after payment by such estate of all taxes on amounts received under this
paragraph (e) such estate retains an amount equal to the amount received under
clause (i) hereof. The federal and state tax liability suffered by a Morris
Contributor or estate with respect to discharge of a loan or amounts paid under
this paragraph (e) shall be determined in accordance with the principles of
paragraphs (b) and (c) above.

     (f) In the event that ROP is not able to receive the full amount of any
Indemnity Remedy payment or any amount otherwise payable to ROP under paragraph
(d) above in any taxable year as a consequence of the Maximum ROP Payment
limitation, the Partnership shall immediately place the unpaid amount in escrow
by wire transfer and shall release any portion thereof to ROP upon and only upon
the Partnership's receipt of a letter from independent accountants of RA
indicating the maximum amount that can be paid at that time to ROP without
causing RA to fail to meet the requirements of Sections 856(c)(2) or (3) of the
Code. The obligation of the Partnership to pay any unpaid portion of an
Indemnity Remedy payment or amount otherwise payable to ROP under paragraph (d)
above shall terminate five (5) years from the date of this Agreement and any
amounts remaining in escrow at such time shall be released to the Partnership.

     Section 30.03. For all purposes of this Section 30, if the tax basis of any
property (the "substitute property") received by the Partnership in exchange for
any Property set forth on SCHEDULE 12.1, SCHEDULE 12.2 or SCHEDULE 13 shall be
determined, in whole or in part, by reference to the tax basis of the
Partnership in such Property, the substitute property shall be treated as such
Property.


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                        SECTION 31: BOARD REPRESENTATION

     Section 31.01. The REIT shall appoint Joseph D. Morris and the President of
RA (the "ROP DESIGNEE" and together with Joseph D. Morris, the "BOARD
DESIGNEES") to the Board of Directors of the REIT (the "BOARD OF ARE") on the
Stage I Closing Date, to serve until the next annual meeting of the REIT's
stockholders. At such annual meeting, the REIT hereby agrees that it shall
nominate Joseph D. Morris to serve as a Class I director of the REIT (i.e., with
an initial term of 1 year) and the ROP Designee to serve as a Class II director
of the REIT (i.e., with an initial term of 2 years); provided, however, that in
no event shall Joseph D. Morris' term as a Class I Director expire prior to the
REIT's 2001 Annual Meeting of Shareholders and in no event shall the ROP
Designee's term as a Class II director expire prior to the REIT's 2002 Annual
Meeting of Shareholders.

                             SECTION 32: ESTOPPELS

     Section 32.01. On or before the Stage I Closing, the RMOP Contributors
shall use good faith efforts to cause RMOP to obtain and deliver to the
Partnership, tenant estoppels (x) from each Major Tenant related to such stage
and (y) with respect to Leases aggregating 75% or more of the leased square
footage of the Properties owned by RMOP (including such Major Tenants);
provided, however, that in the event RMOP shall be unable to obtain the tenant
estoppels set forth in (x) and (y) above, the RMOP Contributors may, at their
option, provide one or more landlord estoppels consistent with the form of
EXHIBIT M hereto (each a "LANDLORD ESTOPPEL") such that the requirements set
forth above are satisfied for up to 20% of the related square footage under
either of (x) or (y) above; it being expressly understood that the tenant
estoppel relating to the 200 Industrial Avenue Property may come only from the
Tenant currently located therein.

     Section 32.02. On or before each Stage II Closing, the RMOP Contributors
(other than RMIIGP) shall use good faith efforts to cause the RMOP Subs to
obtain and deliver to the Partnership, tenant estoppels (x) from each Major
Tenant related to such stage and (y) which, together with any tenant estoppels
obtained in connection with the Stage I Closing, relate to 75% of leased square
footage of all of the Properties owned by both RMOP and the RMOP Subs (including
any Major Tenants in Properties sold/contributed in Stage I and Stage II);
provided, however, that in the event the RMOP Subs shall be unable to obtain the
tenant estoppels set forth in (x) and (y) above, the RMOP Contributors may, at
their option, provide one or more Landlord Estoppels such that the requirements
set forth above are satisfied for up to 40% of the related square footage under
either of (x) or (y) above.

     Section 32.03. In the event the Partnership shall, after a respective
Closing, receive a tenant estoppel in form reasonably satisfactory to the
Partnership relating to any Lease in a Stage I Property or a Stage II Property
with respect to which the Partnership shall have previously received a Landlord
Estoppel, such Landlord Estoppel shall be null and void and of no further effect
to the extent such tenant estoppel confirms the information contained in the
applicable Landlord Estoppel in all material respects. In the event the
Partnership shall receive


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one or more tenant estoppels in form reasonably satisfactory to the Partnership
relating to Leases in Stage I Properties or Stage II Properties with respect to
which the Partnership shall have not previously received a Landlord Estoppels,
the Partnership shall return one or more Landlord Estoppels (designated by the
RMOP Contributors) to the RMOP Contributors relating to one or more Leases with
a square footage which, in the aggregate, shall not exceed that of the Lease(s)
to which such Landlord Estoppel(s) relate.

     Section 32.04. On or before the Stage III Closing, ROP shall use good faith
efforts to cause the ROP Subs to obtain and deliver to the Partnership tenant
estoppels from each Major Tenant related to such stage; provided, however, that
in the event the ROP Subs shall be unable to obtain such tenant estoppels, ROP
may, at its option, provide one or more Landlord Estoppels such that the
requirements set forth above are satisfied for up to 60% of the related square
footage. In the event the Partnership shall receive a tenant estoppel in form
reasonably satisfactory to the Partnership relating to any Lease in a Stage III
Property with respect to which the Partnership shall have previously received a
Landlord Estoppel, such Landlord Estoppel shall be null and void and of no
further effect to the extent such tenant estoppel confirms the information
contained in the applicable Landlord Estoppel in all material respects.

     Section 32.05. The parties agree that the form of tenant estoppel shall be
consistent with the form set forth in EXHIBIT M attached hereto. All tenant
estoppels and non-disturbance agreements shall be delivered to the Partnership
promptly following receipt thereof by any Contributor or Existing Owner.

     Section 32.06. It is expressly understood that the Contributors' liability
with respect to any Landlord Estoppel delivered pursuant to this Section shall
be limited to Losses incurred by the Partnership as a result of any inaccuracy
contained in such Landlord Estoppel, which, together with any Losses suffered as
a result of inaccuracies contained in other Landlord Estoppels, exceeds
$3,000,000, in the aggregate.

      SECTION 33: RIGHT TO RECEIVE CASH IN ABSENCE OF SHAREHOLDER APPROVAL

     Section 33.01. It is understood that the Preferred Stock and Units may not
be converted into REIT Common Stock that in the aggregate, together with any
shares of REIT Common Stock issued at any Closing, represents more than 19.9% of
the total number of shares of REIT Common Stock that are issued and outstanding
on the Stage I Closing Date until and unless the requisite approval from the
REIT's shareholders (the "19.9% SHAREHOLDER APPROVAL") is obtained prior to such
conversion. The REIT agrees that it will use its commercially reasonable efforts
(i) to obtain such 19.9% Shareholder Approval, (ii) to obtain, subject to the
delivery and continued accuracy of the Morris Representation Letter, such
approvals of the Board of ARE, the Board of Trustees of Keystone Property Trust
and the shareholders of the REIT as may be necessary to provide the exception to
the Morris Excepted Holders from the ownership limits set forth in the Charter,
as set forth in the Morris Waiver of Ownership Limits Letter, which shall be
delivered by the REIT to the Morris Excepted Holders after such approvals as set
forth in this


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clause (ii) have been obtained (such necessary approvals referred to herein as
the "Morris Excepted Holder Approval," and together with the 19.9% Shareholder
Approval, the "Requisite Approvals"),and (iii) to present the matters requiring
the 19.9% Shareholder Approval and the matters requiring the Morris Excepted
Holder Approval, if necessary, with management's endorsement, to the REIT's
stockholders at the next annual or special meeting of stockholders following the
date hereof, and to present such matters at each subsequent meeting for at least
three (3) years from the Stage I Closing Date, if the necessary 19.9%
Shareholder Approval or Morris Excepted Holder Approval is not obtained.

     Section 33.02. If the Requisite Approvals referred to in Section 33.01
hereof are not obtained within two (2) years of the applicable Closing Date with
respect to any Units issued pursuant to this Agreement (it being expressly
understood that if ROP or RMIT receives Units at the Stage II Closing or the
Stage III Closing and redeems any Preferred Stock pursuant to the rights granted
in Section 3.01(g) hereof, such two (2) year period shall be reduced by the
period of time ROP or RMIT, as the case may be, held such Preferred Stock but in
no event less than one (1) year from the date of issuance of the Preferred
Stock), each holder of such Units shall be entitled, at its election, to receive
cash, in lieu of REIT Common Stock, within ten (10) days of such election in
respect of any Units that may not be converted by reason of the REIT's failure
to obtain the Requisite Approvals, in an amount equal to the value of the REIT
Common Stock that such securities are convertible into (based upon the closing
price of the REIT Common Stock on the primary market on which it is traded on
the date prior to such election), provided, however, that in no event shall such
cash amount be less than the liquidation preference, plus any accumulated and
unpaid dividends, of the Units being converted and provided further that, in
addition to such cash payment, each holder of such Unit so electing shall be
entitled to all rights of a holder of Units, notwithstanding such election,
including the right to receive dividends in an amount equal to the amount of
distributions accruing on Units between the date of such election and the date
on which the cash payment is paid in full.

     Section 33.03. If the Requisite Approvals referred to in Section 33.01
hereof are not obtained within one (1) year of the applicable Closing Date with
respect to any Preferred Stock issued pursuant to this Agreement, each holder of
such Preferred Stock shall be entitled, at its election, to receive cash, in
lieu of REIT Common Stock, within 10 days of such Person's election, in respect
of any Preferred Stock that may not be converted, in an amount equal to the
value of the REIT Common Stock that such securities are convertible into (based
upon the closing price of the REIT Common Stock on the primary market on which
it is traded on the date prior to such election), provided, however, that in no
event shall such cash amount be less than the liquidation preference, plus any
accumulated and unpaid dividends, of the Preferred Stock being converted and
provided further that, in addition to such cash payment, each holder of such
Preferred Stock so electing shall be entitled to all rights of a holder of
Preferred Stock, notwithstanding such election, including the right to receive
dividends in an amount equal to the amount of distributions accruing on
Preferred Stock between the date of such election and the date on which the cash
payment is paid in full.


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     Section 33.04. The REIT and the Partnership agree that if the REIT fails to
(i) file a proxy statement with the SEC within three (3) months of the Stage I
Closing Date with respect to a meeting of stockholders seeking the Requisite
Approvals (an "APPROVAL PROXY") and (ii) hold such meeting within two hundred
twenty five (225) days of the Stage I Closing Date, the dividend rate with
respect to Preferred Stock and Units shall be increased by 125 basis points on
an annual basis until such meeting is held. The REIT and the Partnership further
agree that if the REIT fails to (i) file an Approval Proxy with the SEC within
six months of the Stage I Closing Date and (ii) hold such meeting within one (1)
year of the Stage I Closing Date, each holder of Units and Preferred Stock shall
be entitled, at its election, to redeem any Units and/or Preferred Stock issued
pursuant to the terms of this Agreement in excess of 19.9% of the total number
of shares of REIT Common Stock that are issued and outstanding on the Stage I
Closing Date for cash in an amount equal to the value of the REIT Common Stock
that such securities are convertible into (based upon the closing market price
of the REIT Common Stock on the primary market on which it is traded on the date
prior to their redemption), provided, however, that in no event shall such cash
amount be less than the liquidation preference, plus any accumulated and unpaid
distributions and/or dividends, of the Units and/or Preferred Stock being
redeemed and provided further that, in addition to such cash payment, each
holder of such Units and/or Preferred Stock so electing shall be entitled to all
rights of a holder of Units and/or Preferred Stock, notwithstanding such
election, including the right to receive distributions and/or dividends in an
amount equal to the amount of distributions and/or dividends accruing on Units
and/or Preferred Stock between the date of such election and the date on which
the cash payment is paid in full.

     Section 33.05. The provisions of Sections 33.02, 33.03 and 33.04 hereof
shall only be effective until Requisite Approvals are obtained. Upon the receipt
of the Requisite Approvals holders of Units shall have the conversion rights set
forth in the Partnership Unit Designation for the Units.

                               SECTION 34: KRAFT

     Section 34.01. A portion of the Stage I Properties consist of the property
commonly known as the "Kraft Property" (the "KRAFT PROPERTY" and the
"DEVELOPMENT PROPERTY"). Notwithstanding anything herein to the contrary but
subject to the provisions of this Section, the Development Properties will be
contributed at the Stage I Closing to a newly-formed limited liability company
(the "DEVELOPMENT LLC") in which the Partnership and one or more of the Morris
Contributors (collectively, the "MORRIS ENTITY") will be members pursuant to an
operating agreement which will be in the same basic form as the operating
agreement attached as Exhibit G to the Industrial Property Investment and
Exclusivity Agreement (the "FORM OF OPERATING AGREEMENT") except that such
operating agreement shall be revised to provide as follows: (i) cash flow from
the Development Properties shall be distributed during each calendar year (no
less frequently than quarterly) in the following order of priority (to the
extent available during such calendar year): (A) all capital contributions (as
defined in the Form of Operating Agreement) will be repaid to the members who
made such capital contributions, (B) all members who have made capital
contributions will be paid a return at the rate of 10% per annum for such


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calendar year (calculated and compounded annually, to the extent of any
deficiency from any prior calendar year) on the amount (such amount being herein
called the "INVESTED PRINCIPAL CAPITAL") of their unreturned capital
contributions plus the outstanding principal amount of any secured or unsecured
indebtedness of the Development LLC to the extent the proceeds relating
therefrom are used to pay costs associated with the Development Property or to
reimburse the Members for costs associated with the Development Property); (C)
in equal shares to the Partnership and to the Morris Entity until such time as
the members who have made Capital Contributions shall have received a return at
the rate of 11% per annum for such calendar year (calculated and compounded
annually, to the extent of any deficiency from any prior calendar year) on the
Invested Principal Capital; and (D) and thereafter cash flow for such calendar
year shall be distributed 75% to the Morris Entity and 25% to the Partnership.
For the purpose of applying the preceding sentence to distributions of cash
proceeds from a sale or refinancing of the Development Property, "capital
contributions" shall include the Morris Contributors' right to receive an amount
equal to five percent (5%) of the Total Hard Costs (as defined in the Form of
Operating Agreement). The Partnership and the Morris Contributors agree to use
commercially reasonable efforts to agree upon the form of the Operating
Agreement for the Development LLC prior to the Stage I Closing. The Morris
Contributors shall have the right to elect to contribute up to 50% of Capital to
the Development LLC. The Partnership will use best efforts (provided such
financing is on customary market terms for similar credit and type of loans) to
cause the Development LLC to finance the Kraft Property at a 70% loan to value
ratio. During the Contract Period, the Board of ARE will consider whether it
shall approve the acquisition of the Development Property. In the event the
Board of ARE votes to approve the acquisition of the Development Property, the
Development Property shall be contributed to the Development LLC as aforesaid.
In the event the Board of ARE does not approve the proposal with respect to the
Development Property by the Stage I Closing Date, then (i) the Development
Property shall not be part of the Stage I Closing and the Stage I Consideration
shall be decreased by the allocated value of the Development Property (it being
acknowledged that RMIT shall have the right to determine which component(s) of
the Stage I Consideration shall be decreased) and (ii) the Morris Contributors
shall purchase such Development Property from RMOP immediately prior to the
Stage I Closing Date at a purchase price equal to the allocated value of such
Development Property (subject to the adjustments and prorations sections set
forth above).

     Section 34.02. During the Contract Period, ROP shall have the right to have
the office building located on the Givaudan property distributed to it pursuant
to the agreement set forth on EXHIBIT X hereto.

                          SECTION 35: INDEMNIFICATION

     Section 35.01. Contributors jointly and severally agree to indemnify the
REIT and the Partnership (collectively, "ARE") from and against (i) any Losses
in excess of $20 million suffered, incurred or sustained by ARE resulting from,
arising out of or relating to any breach of or inaccuracy in any representation
or warranty set forth in Section 10 hereof, (ii) any Losses in excess of $3.5
million suffered, incurred or sustained by ARE resulting from, arising out of or
relating to any breach of or inaccuracy of the warranty set forth in Section
10.18 (a) hereof, (iii)


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any Losses in excess of $2 million suffered, incurred or sustained by ARE
resulting from, arising out of or relating to any breach of or inaccuracy of the
warranty set forth in Section 10.18 (b) or (c) hereof and (iv) any Losses
suffered, incurred or sustained by ARE resulting from, arising out of or
relating to any breach of or inaccuracy in any representation or warranty set
forth in Section 23 hereof.

     Section 35.02. The REIT and the Partnership jointly and severally agree to
indemnify the Contributors from and against, any and all Losses suffered,
incurred or sustained by any of them or to which any of them becomes subject,
resulting from, arising out of or relating to any breach of or inaccuracy in any
representation or warranty contained in Section 12 of this Agreement.

     Section 35.03. If any Indemnified Party should have a claim under this
Section 35 against any Indemnifying Party, the Indemnified Party shall deliver
an Indemnity Notice to the Indemnifying Party within ten (10) Business Days
after it is discovered by the Indemnified Party. If the Indemnifying Party
notifies the Indemnified Party that it does not dispute the claim described in
such Indemnity Notice or fails to notify the Indemnified Party within the
Dispute Period whether the Indemnifying Party disputes the claim described in
such Indemnity Notice, the Loss in the amount specified in the Indemnity Notice
will be conclusively deemed a liability of the Indemnifying Party under this
Section 35 and the Indemnifying Party shall pay the amount of such Loss to the
Indemnified Party on demand. If the Indemnifying Party has timely disputed its
liability with respect to such claim, the Indemnifying Party and the Indemnified
Party will proceed in good faith to negotiate a resolution of such dispute, and
if not resolved through negotiations within the Dispute Period, the Indemnified
Party may pursue such claim in court.

     Section 35.04. Notwithstanding any provision in this Agreement to the
contrary (including, without limitation, Section 4.02 hereof) ARE and the
Contributors agree as follows:

          (i) A Contributor's liability under the indemnification provisions set
     forth above shall be joint and several with all other Contributors making
     the same representation or warranty for which indemnification has been
     claimed; provided, however, that in no event shall a Contributor be liable
     for any representation or warranty not made by such Contributor.

          (ii) No claims may be made under the indemnification provisions set
     forth above unless the Closing to which the misrepresentations have been
     made has already occurred.

          (iii) If an Indemnified Party is aware of a breach or inaccuracy of
     the Indemnifying Party's representation or warranty at Closing, then the
     Indemnified Party may not thereafter bring a claim under this Section 35
     against the Indemnifying Party with respect to such representation or
     warranty; provided, however, that if ARE is aware at Closing of a breach or
     inaccuracy of a representation or warranty of one or more Contributors,
     then the Losses relating to such breach or inaccuracy shall be credited to
     the $20 million (or $3.5 million or $2 million) threshold referred to in
     Section 35.01 hereof. For purposes of this Section 35.04(iii), ARE shall be
     deemed to be aware of a


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     breach or inaccuracy of a representation or warranty only if such breach or
     inaccuracy is actually known by Jeffrey Kelter, Stephen Butte or Timothy
     Peterson.

          (iv) No claim shall be made with respect to the representations and
     warranties after the expiration of the survival period applicable to such
     representations and warranties (which survival periods are set forth in
     Section 10, 12 and 23 of this Agreement); provided, however, that the
     foregoing limitation shall not apply to the extent any claim for
     indemnification is made under this Agreement prior to the expiration of the
     survival period relating to such representation and warranty in which case
     such survival period will be extended as it relates to such related claims
     until the related claim for indemnification has been satisfied or otherwise
     resolved as provided in this Section 35.

     Section 35.05. No claim for damages relating from a breach or inaccuracy of
a representation or warranty may be made except pursuant to the terms of this
Section 35.

                             SECTION 36: COVENANTS

     Section 36.01. So long as ROP directly and through Affiliates shall own, in
the aggregate, at least a Substantial ARE Position, the REIT covenants that it
shall deliver to RA and RA's counsel, within ten (10) Business Days after the
receipt by the REIT of any request by RA, a representation letter as to the
REIT's status as a real estate investment trust under the Code substantially in
the form of paragraph (i) of SCHEDULE 4.1 hereof (substituting for "1998" the
most recently completed year), which representation letter shall provide that it
relies, in part, upon an opinion as to the REIT's status as a real estate
investment trust under the Code issued to the REIT, on or after its receipt of
the request by RA, by Rogers & Wells LLP, or such other counsel of national
reputation as shall be reasonably acceptable to RA's counsel, substantially in
the form of paragraph (i) of SCHEDULE 4.1 (substituting for "1998" the most
recently completed year), which opinion shall be attached to the representation
letter, and which representation letter by its terms shall permit RA's counsel
to rely on such representation letter for purposes of its issuing an opinion
with respect to RA's status as a real estate investment trust under the Code. A
"SUBSTANTIAL ARE POSITION" shall mean 8% or more of the outstanding voting
securities of the REIT, provided that if the restriction on the ownership by a
real estate investment trust of more than 10% of the voting securities of an
issuer currently contained in Section 856(c)(4)(B) of the Code is changed to
include a restriction on the ownership of a percentage of the value of an
issuer, then a "SUBSTANTIAL ARE POSITION" shall mean 80% or more of such
percentage of the value of the outstanding stock of the REIT, PROVIDED FURTHER
that the only securities of the REIT which shall be taken into account for the
purpose of determining a Substantial ARE Position shall be those securities
issued to ROP or its Affiliates by the REIT at a Closing or those securities
issued to ROP or its Affiliates by the REIT in connection with the conversion of
Units or shares of Preferred Stock issued to ROP or its Affiliates by the REIT
or the Partnership at a Closing . For this purpose, in the case of any stock of
the REIT that is not publicly traded, value shall be as reasonably determined by
RA, but shall in no event be greater than the greatest of (i) the value of the
REIT Common Stock, if any, into which such stock is convertible, (ii) the
liquidation preference, if any, of such stock, and (iii) the value of such stock
as determined by an


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independent third party selected by RA and reasonably acceptable to the REIT. In
addition, ROP directly or through Affiliates shall be considered to own a
Substantial ARE Position if it actually owned a Substantial ARE Position
(without regard to this sentence) at any time after the last time a
representation letter was issued pursuant to this Section 36.01 (or, if no
representation letter was ever issued pursuant to this Section 36.01, at any
time after the Stage I Closing). If the REIT fails to deliver the representation
letter required by this paragraph on the terms set forth herein, then ROP and
its Affiliates shall have the right to redeem, for cash, the amount of REIT
Common Stock and Preferred Stock held by ROP and its Affiliates necessary to
decrease the holdings of ROP directly and through Affiliates to less than a
Substantial ARE Position. Any such redemption with respect to REIT Common Stock
shall be at a price equal to the average closing price on the AMEX (or such
other exchange as the REIT Common Stock may then be traded upon, or if not then
traded on an exchange, the average of the closing bid and ask prices in any
over-the-counter or similar market) during the 30-day period immediately
preceding the day which is three (3) Business Days prior to the date such shares
are presented for redemption. Any such redemption with respect to Preferred
Stock shall be at a price equal to the greater of the value of the REIT Common
Stock that such securities are convertible into and the liquidation preference,
plus any accumulated and unpaid dividends of the securities being redeemed, with
the value of REIT Common Stock being based upon the calculation set forth in the
preceding sentence. The proceeds from any Equity redeemed pursuant to the terms
hereof shall be payable within ten (10) Business Days from the date securities
are presented for redemption.

     Section 36.02. The Partnership and the REIT covenant that the Partnership
and the REIT shall use commercially reasonable efforts to be Year 2000 Compliant
on or prior to December 1, 1999. On or before the Stage I Closing Date, the
Partnership and the REIT will cause an officer of the REIT to submit a
certificate to the Contributors that apprises the Contributors of the
Partnership's and the REIT's efforts to satisfy this covenant and become Year
2000 Compliant.

     Section 36.03. The Partnership covenants that the Partnership shall use the
"traditional method" of allocation, as described in section 1.704-3(b)(1) of the
Treasury Regulations, with respect to the Properties.

     Section 36.04. The Partnership and the REIT shall cause Rogers & Wells LLP,
or such other counsel of national reputation as shall be reasonably acceptable
to RA, to deliver to RA within the first ten Business Days of any year
immediately following a year in which ROP and its Affiliates owned at any time,
in the aggregate, at least a Substantial ARE Position, an opinion as to the
REIT's status as a real estate investment trust under the Code substantially in
the form of paragraph (i) of SCHEDULE 4.1 (substituting for "1998" the most
recently completed year). Such opinion shall be addressed to the REIT and shall
provide that it is for the benefit of the REIT's shareholders. If such opinion
shall not be delivered on the terms set forth herein, then ROP and its
Affiliates shall have the right to redeem, for cash, at the prices described in
Section 36.01 hereof, the amount of REIT Common Stock and Preferred Stock held
by ROP and its Affiliates necessary to decrease the holdings of ROP directly and
through Affiliates to less than a Substantial ARE Position.


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     Section 36.05. If the REIT shall revoke its election to qualify as a real
estate investment trust under the Code or if the Board of ARE shall determine
that the REIT shall revoke such election or that such election shall otherwise
terminate, ROP and its Affiliates shall have the right to redeem, for cash, at
the prices described in Section 36.01 hereof, all REIT Common Stock, Preferred
Stock and Units held by them.

     Section 36.06. The REIT and the Partnership covenant that the Contributors
shall receive the benefit of any change or supplement to the terms of the
investment contemplated by Section 12(t) hereof (as set forth in Schedule 20
hereto) which is beneficial to the acquirer of such securities, with such terms
to be reflected in the Articles Supplementary creating the Preferred Stock or in
the Amendment to the Partnership Agreement creating the Units.

     Section 36.07. The REIT covenants that, other than any Excepted Holder
Limit (as defined in the Charter) currently granted or to be granted pursuant to
the transactions contemplated by this Agreement, and any changes in the
ownership limit with respect to the Preferred Stock currently effective or to be
adopted pursuant to the transactions contemplated by this Agreement, the REIT
will not grant any future Excepted Holder Limit under the Charter or otherwise
amend or adjust the ownership limit applicable to the REIT stockholders
generally if, by reason of the grant of such Excepted Holder Limit or such
amendment or adjustment and taking into account all other Excepted Holder Limits
granted by the REIT, five (5) or fewer individuals (as defined in Code Section
542(a)(2), as modified by Code Section 856(h)) could actually and/or
constructively hold more than 49.5% of the value of the outstanding REIT capital
stock on a fully diluted basis.



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     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the day and year first above written.

                           CONTRIBUTORS

                           RECKSON OPERATING PARTNERSHIP, L.P.

                               By: Reckson Associates Realty Corp., its general
                                   partner



                               By: /s/ Jason  Barnett
                               Name: Jason Barnett
                               Title: Executive Vice President

                           RECKSON MORRIS INDUSTRIAL TRUST



                               By:/s/ Richard Conniff
                               Name: Richard Conniff
                               Title: Executive Vice President



                           RECKSON MORRIS INDUSTRIAL INTERIM GP LLC



                               By:/s/ Mark N. Bava
                               Name: Mark N. Bava
                               Title: Executive Vice President



                                /s/ Joseph D. Morris
                                Name: Joseph D. Morris

                                /s/ Robert Morris
                                Name: Robert Morris


<PAGE>



                                /s/ Mark M.. Bava
                                Name: Mark M. Bava


                                /s/ Ronald Schram
                                Name: Ronald Schram


                          THE DREW MORRIS TRUST




                                By:/s/ Drew Morris
                                Name: Drew Morris



                         THE JUSTIN MORRIS TRUST



                               By:/s/ Justin Morris
                               Name: Justin Morris


                         THE KEITH MORRIS TRUST



                               By: /s/ Keith Morris
                               Name: Keith Morris




                         JOSEPH D. MORRIS FAMILY LIMITED PARTNERSHIP



                               By: /s/ Joseph D. Morris
                               Name: Joseph D. Morris




<PAGE>




                         ROBERT MORRIS FAMILY LIMITED PARTNERSHIP



                               By: /s/ Robert Morris
                               Name: Robert Morris





                          PARTNERSHIP:

                          AMERICAN REAL ESTATE INVESTMENT, L.P.

                               By:  American Real Estate Investment
                                    Corporation, its general partner


                                    By: /s/ Timothy A. Peterson
                                        Name: Timothy A. Peterson
                                        Title: Executive Vice President

                          REIT


                          AMERICAN REAL ESTATE INVESTMENT CORPORATION


                                    By: /s/ Timothy A. Peterson
                                        Name: Timothy A. Peterson
                                        Title: Executive Vice President





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