<PAGE>   1
                                                                    EXHIBIT 10.1


                      LIBERTY PROPERTY LIMITED PARTNERSHIP,

                                   AS OBLIGOR

                                       AND

                       THE FIRST NATIONAL BANK OF CHICAGO,

                                   AS TRUSTEE

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

                                    INDENTURE

                           DATED AS OF AUGUST 14, 1997

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

                                 Debt Securities

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






<PAGE>   2



                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                           Page
<S>                                                                                        <C>
PARTIES....................................................................................  1
RECITALS OF THE COMPANY....................................................................  1
ARTICLE ONE

      DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION..............................  1
      SECTION 101.  Definitions............................................................  1
      SECTION 102.  Compliance Certificates and Opinions................................... 11
      SECTION 103.  Form of Documents Delivered to Trustee................................. 12
      SECTION 104.  Acts of Holders........................................................ 12
      SECTION 105.  Notices, etc., to Trustee and Company.................................. 14
      SECTION 106.  Notice to Holders; Waiver.............................................. 14
      SECTION 107.  Effect of Headings and Table of Contents............................... 15
      SECTION 108.  Successors and Assigns................................................. 16
      SECTION 109.  Separability Clause.................................................... 16
      SECTION 110.  Benefits of Indenture.................................................. 16
      SECTION 111.  Non-Recourse........................................................... 16
      SECTION 112.  Governing Law.......................................................... 16
      SECTION 113.  Legal Holidays......................................................... 16

ARTICLE TWO

      SECURITIES FORMS..................................................................... 17
      SECTION 201.  Forms of Securities.................................................... 17
      SECTION 202.  Form of Trustee's Certificate of Authentication........................ 17
      SECTION 203.  Securities Issuable in Global Form..................................... 17

ARTICLE THREE

      THE SECURITIES....................................................................... 18
      SECTION 301.  Amount Unlimited; Issuable in Series................................... 18
      SECTION 302.  Denominations.......................................................... 22
      SECTION 303.  Execution, Authentication, Delivery and Dating......................... 22
      SECTION 304.  Temporary Securities................................................... 24
      SECTION 305.  Registration, Registration of Transfer and Exchange.................... 26
      SECTION 306.  Mutilated, Destroyed, Lost and Stolen Securities....................... 29
      SECTION 307.  Payment of Interest; Interest Rights Preserved......................... 31
      SECTION 308.  Persons Deemed Owners.................................................. 32
      SECTION 309.  Cancellation........................................................... 33
      SECTION 310.  Computation of Interest................................................ 34
ARTICLE FOUR

      SATISFACTION AND DISCHARGE........................................................... 34
      SECTION 401.  Satisfaction and Discharge of Indenture................................ 34
      SECTION 402.  Application of Trust Funds............................................. 35
</TABLE>

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<TABLE>
<S>                                                                                         <C>
ARTICLE FIVE

      REMEDIES............................................................................. 35
      SECTION 501.  Events of Default...................................................... 35
      SECTION 502.   Acceleration of Maturity; Rescission and Annulment.................... 37
      SECTION 503.  Collection of Indebtedness and Suits for Enforcement by Trustee........ 38
      SECTION 504.  Trustee May File Proofs of Claim....................................... 39
      SECTION 505.  Trustee May Enforce Claims Without Possession of Securities or
            Coupons........................................................................ 39
      SECTION 506.  Application of Money Collected......................................... 40
      SECTION 507.  Limitation on Suits.................................................... 40
      SECTION 508.  Unconditional Right of Holders to Receive Principal, Premium or Make-
            Whole Amount, if any, Interest and Additional Amounts.......................... 41
      SECTION 509.  Restoration of Rights and Remedies..................................... 41
      SECTION 510.  Rights and Remedies Cumulative......................................... 41
      SECTION 511.  Delay or Omission Not Waiver........................................... 41
      SECTION 512.  Control by Holders of Securities....................................... 41
      SECTION 513.  Waiver of Past Defaults................................................ 42
      SECTION 514.  Waiver of Usury, Stay or Extension Laws................................ 42
      SECTION 515.  Undertaking for Costs.................................................. 42
ARTICLE SIX

      THE TRUSTEE.......................................................................... 43
      SECTION 601.  Notice of Defaults..................................................... 43
      SECTION 602.  Certain Rights of Trustee.............................................. 43
      SECTION 603.  Not Responsible for Recitals or Issuance of Securities................. 44
      SECTION 604.  May Hold Securities.................................................... 45
      SECTION 605.  Money Held in Trust.................................................... 45
      SECTION 606.  Compensation and Reimbursement......................................... 45
      SECTION 607.  Corporate Trustee Required; Eligibility; Conflicting Interests......... 46
      SECTION 608.  Resignation and Removal; Appointment of Successor...................... 46
      SECTION 609.  Acceptance of Appointment by Successor................................. 47
      SECTION 610.  Merger, Conversion, Consolidation or Succession to Business............ 48
      SECTION 611.  Appointment of Authenticating Agent.................................... 49
ARTICLE SEVEN

      HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY.................................... 50
      SECTION 701.  Disclosure of Names and Addresses of Holders........................... 50
      SECTION 702.  Reports by Trustee..................................................... 50
      SECTION 703.  Reports by Company..................................................... 50
      SECTION 704.  The Company to Furnish Trustee Names and Addresses of Holders.......... 51
ARTICLE EIGHT

      CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE..................................... 51
      SECTION 801.  Consolidations and Mergers of Company and Sales, Leases and
            Conveyances Permitted Subject to Certain Conditions............................ 51
</TABLE>


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<TABLE>
<S>                                                                                         <C>
      SECTION 802.  Rights and Duties of Successor Entity.................................. 52
      SECTION 803.  Officers' Certificate and Opinion of Counsel........................... 52
ARTICLE NINE

      SUPPLEMENTAL INDENTURES.............................................................. 53
      SECTION 901.  Supplemental Indentures Without Consent of Holders..................... 53
      SECTION 902.  Supplemental Indentures with Consent of Holders........................ 54
      SECTION 903.  Execution of Supplemental Indentures................................... 55
      SECTION 904.  Effect of Supplemental Indentures...................................... 55
      SECTION 905.  Conformity with Trust Indenture Act.................................... 55
      SECTION 906.  Reference in Securities to Supplemental Indentures..................... 55
      SECTION 907.  Notice of Supplemental Indentures...................................... 56
ARTICLE TEN

      COVENANTS............................................................................ 56
      SECTION 1001.  Payment of Principal, Premium (if any), Make-Whole Amount (if any),
            Interest and Additional Amounts................................................ 56
      SECTION 1002.  Maintenance of Office or Agency....................................... 56
      SECTION 1003.  Money for Securities Payments to Be Held in Trust..................... 58
      SECTION 1004.  Intentionally Omitted................................................. 59
      SECTION 1005.  ...................................................................... 59
      SECTION 1006.  Maintenance of Properties............................................. 59
      SECTION 1007.  Insurance............................................................. 60
      SECTION 1008.  Payment of Taxes and Other Claims..................................... 60
      SECTION 1009.  Provision of Financial Information.................................... 60
      SECTION 1010.  Statement as to Compliance............................................ 60
      SECTION 1011.  Additional Amounts.................................................... 60
      SECTION 1012.  Waiver of Certain Covenants........................................... 61
ARTICLE ELEVEN

      REDEMPTION OF SECURITIES............................................................. 62
      SECTION 1101.  Applicability of Article; Redemption to Maintain REIT Status.......... 62
      SECTION 1102.  Election to Redeem; Notice to Trustee................................. 62
      SECTION 1103.  Selection by Trustee of Securities to Be Redeemed..................... 62
      SECTION 1104.  Notice of Redemption.................................................. 62
      SECTION 1105.  Deposit of Redemption Price........................................... 64
      SECTION 1106.  Securities Payable on Redemption Date................................. 64
      SECTION 1107.  Securities Redeemed in Part........................................... 65
ARTICLE TWELVE

      SINKING FUNDS........................................................................ 65
      SECTION 1201.  Applicability of Article.............................................. 65
      SECTION 1202.  Satisfaction of Sinking Fund Payments with Securities................. 65
      SECTION 1203.  Redemption of Securities for Sinking Fund............................. 66
ARTICLE THIRTEEN

      REPAYMENT AT THE OPTION OF HOLDERS................................................... 66 
</TABLE>

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<TABLE>
<S>                                                                                         <C>
      SECTION 1301.  Applicability of Article.............................................. 66
      SECTION 1302.  Repayment of Securities............................................... 66
      SECTION 1303.  Exercise of Option.................................................... 67
      SECTION 1304.  When Securities Presented for Repayment Become Due and Payable........ 67
      SECTION 1305.  Securities Repaid in Part............................................. 68
ARTICLE FOURTEEN

      DEFEASANCE AND COVENANT DEFEASANCE................................................... 68
      SECTION 1401.  Applicability of Article; Company's Option to Effect Defeasance or
            Covenant Defeasance............................................................ 68
      SECTION 1402.  Defeasance and Discharge.............................................. 69
      SECTION 1403.  Covenant Defeasance................................................... 69
      SECTION 1404.  Conditions to Defeasance or Covenant Defeasance....................... 70
      SECTION 1405.  Deposited Money and Government Obligations to Be Held in Trust;
            Other Miscellaneous Provisions................................................. 71
ARTICLE FIFTEEN

      MEETINGS OF HOLDERS OF SECURITIES.................................................... 72
      SECTION 1501.  Purposes for Which Meetings May Be Called............................. 72
      SECTION 1502.  Call, Notice and Place of Meetings.................................... 72
      SECTION 1503.  Persons Entitled to Vote at Meetings.................................. 73
      SECTION 1504.  Quorum; Action........................................................ 73
      SECTION 1505.  Determination of Voting Rights; Conduct and Adjournment of
            Meetings....................................................................... 74
      SECTION 1506.  Counting Votes and Recording Action of Meetings....................... 75
      SECTION 1507.  Evidence of Action Taken by Holders................................... 75
      SECTION 1508.  Proof of Execution of Instruments..................................... 76
</TABLE>


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<PAGE>   6



                Liberty Property Limited Partnership, as Obligor

               Reconciliation and tie between Trust Indenture Act of 1939 (the
"1939 Act") and this Indenture, dated as of August 14, 1997.

<TABLE>
<CAPTION>
Trust Indenture Act Section                                  Indenture Section

<S> <C> <C> <C>                                              <C>
(S) 310 (a) (1)............................................       607
        (a) (2)............................................       607
        (b) ...............................................  607, 608
(S) 312 (c) ...............................................       701
(S) 313 (a) ...............................................        70
        (c) ...............................................       702

(S) 314 (a) ...............................................       703
        (a) (4)............................................      1011
        (c) (1)............................................       102
        (c) (2)............................................       102
        (e) ...............................................       102
(S) 315 (b) ...............................................       601
(S) 316 (a) (last sentence)................................       101 ("Outstanding")
        (a) (1)(A).........................................  502, 512
        (a) (1)(B).........................................       513
        (b) ...............................................       508

(S) 317 (a) (1)............................................       503
        (a) (2)............................................       504
(S) 318 (a) ...............................................       111
        (c) ...............................................       111
</TABLE>

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

NOTE:    This reconciliation and tie shall not, for any purpose, be deemed to be
         a part of this Indenture.

         Attention should also be directed to Section 318 (c) of the 1939 Act,
         which provides that the provisions of Sections 310 to and including 317
         of the 1939 Act are a part of and govern every qualified indenture,
         whether or not physically contained therein.


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<PAGE>   7



                                     PARTIES

         Indenture (this "Indenture"), dated as of August 14, 1997, by and
between LIBERTY PROPERTY LIMITED PARTNERSHIP, a Pennsylvania limited partnership
(the "Company") having its principal office at 65 Valley Stream Parkway,
Malvern, Pennsylvania 19355, and The First National Bank of Chicago, a national
banking association, as Trustee hereunder (the "Trustee"), having its Corporate
Trust Office (as defined below) at One First National Plaza, Suite 0126,
Chicago, Illinois 60670-0126.

                             RECITALS OF THE COMPANY

         The Company deems it necessary to issue from time to time for its
lawful purposes debt securities (the "Securities") evidencing its unsecured
indebtedness, and has duly authorized the execution and delivery of this
Indenture to provide for the issuance from time to time of the Securities,
unlimited as to principal amount, to bear interest at the rates or formulas, to
mature at such times and to have such other provisions as shall be fixed as
hereinafter provided.

         This Indenture is subject to the provisions of the Trust Indenture Act
of 1939, as amended, that are deemed to be incorporated into this Indenture and
shall, to the extent applicable, be governed by such provisions.

         All things necessary to make this Indenture a valid agreement of the
Company, in accordance with its terms, have been done.

         NOW, THEREFORE, THIS INDENTURE WITNESSETH:

         For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually covenanted and agreed, for the
equal and proportionate benefit of all Holders of the Securities, as follows:

                                   ARTICLE ONE

             DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION

         SECTION 101. Definitions. For all purposes of this Indenture, except as
otherwise expressly provided or unless the context otherwise requires:

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

         (2) all other terms used herein which are defined in the TIA, either
directly or by reference therein, have the meanings assigned to them therein,
and the terms "cash transaction" and "self-liquidating paper," as used in TIA
Section 311, shall have the meanings assigned to them in the rules of the
Commission adopted under the TIA;



<PAGE>   8



         (3) all accounting terms not otherwise defined herein have the meanings
assigned to them in accordance with GAAP; and

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

         "Acquisition Lines of Credit" means, collectively, any secured lines of
credit of the Company or any Subsidiary, the proceeds of which shall be used,
among other things, to acquire interests, directly or indirectly, in real
estate.

         "Act," when used with respect to any Holder, has the meaning specified
in Section 104.

         "Additional Amounts" means any additional amounts which are required by
a Security or by or pursuant to a Board Resolution, under circumstances
specified therein, to be paid by the Company in respect of certain taxes imposed
on certain Holders and which are owing to such Holders.

         "Adjusted Total Assets" as of any date means the total of all assets
determined in accordance with GAAP plus accumulated depreciation.

         "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

         "Annual Service Charge" as of any date means the aggregate amount of
any interest expensed for the four consecutive fiscal quarters most recently
ended prior to such date as determined in accordance with GAAP.

         "Authenticating Agent" means any authenticating agent appointed by the
Trustee pursuant to Section 611.

         "Authorized Newspaper" means a newspaper, printed in the English
language or in an official language of the country of publication, customarily
published on each Business Day, whether or not published on Saturdays, Sundays
or holidays, and of general circulation in each place in connection with which
the term is used or in the financial community of each such place. Whenever
successive publications are required to be made in Authorized Newspapers, the
successive publications may be made in the same or in different Authorized
Newspapers in the same city meeting the foregoing requirements and in each case
on any Business Day.

         "Bankruptcy Law" has the meaning specified in Section 501. 


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         "Bearer Security" means any Security established pursuant to Section
201 which is payable to bearer.

         "Board of Trustees" means the board of trustees of the Trust, the
executive committee or any committee of that board duly authorized to act
hereunder, as the case may be.

         "Board Resolution" means a copy of a resolution of the Trust, certified
by the Secretary or an Assistant Secretary of the Trust to have been duly
adopted by the Board of Trustees and to be in full force and effect on the date
of such certification, and delivered to the Trustee.

         "Business Day," when used with respect to any Place of Payment or any
other particular location referred to in this Indenture or in the Securities,
means, unless otherwise specified with respect to any Securities pursuant to
Section 301, any day, other than a Saturday or Sunday, that is neither a legal
holiday nor a day on which banking institutions in that Place of Payment or
particular location are authorized or required by law, regulation or executive
order to close.

         "CEDEL" means Centrale de Livraison de Valeurs Mobilieres, S.A., or its
successor.

         "Commission" means the Securities and Exchange Commission, as from time
to time constituted, created under the Exchange Act, or, if at any time after
execution of this instrument such Commission is not existing and performing the
duties now assigned to it under the Trust Indenture Act, then the body
performing such duties on such date.

         "Common Shares" means, with respect to any Person, capital stock or
shares of beneficial interest issued by such Person other than Preferred Shares.

         "Company" means Liberty Property Limited Partnership, a Pennsylvania
limited partnership, until a successor Company shall have become such pursuant
to the applicable provisions of this Indenture, and thereafter "Company" shall
mean such successor Company.

         "Company Request" and "Company Order" mean, respectively, a written
request or order signed in the name of and on behalf of the Company by the
Chairman of the Board, the President or a Vice President, and by the Treasurer
or an Assistant Treasurer, the Secretary or an Assistant Secretary of the Trust,
as general partner of the Company, and delivered to the Trustee.

         "Consolidated Income Available for Debt Service" as of any date means
Consolidated Net Income of the Company and its Subsidiaries plus amounts that
have been deducted for (a) interest on Debt of the Company and its Subsidiaries,
(b) provision for taxes of the Company and its Subsidiaries based on income, (c)
amortization of debt discount, (d) depreciation and amortization, (e) the effect
of any noncash charge resulting from a change in accounting principles in
determining Consolidated Net Income and (f) amortization of deferred charges,
for the four consecutive fiscal quarters most recently ended, all as determined
in accordance with GAAP, and without taking into account any provision for gains
and losses on properties.


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<PAGE>   10



         "Consolidated Net Income" for any period means the amount of net income
(or loss) of the Company and its Subsidiaries for such period determined on a
consolidated basis in accordance with GAAP.

         "Conversion Event" means the cessation of use of (i) a Foreign Currency
both by the government of the country which issued such currency and for the
settlement of transactions by a central bank or other public institutions of or
within the international banking community, (ii) the ECU both within the
European Monetary System and for the settlement of transactions by public
institutions of or within the European Communities or (iii) any currency unit
(or composite currency) other than the ECU for the purposes for which it was
established.

         "Corporate Trust Office" means the principal corporate trust office of
the Trustee at which, at any particular time, its corporate trust business shall
be administered, which office at the date hereof is located at One First
National Plaza, Suite 0126, Chicago, Illinois 60670, except that for purposes of
Section 1002, such term shall mean the office or agency of the Trustee in the
United Kingdom, which office at the date hereof is located at 27 Leadenhall
Street, London EC3A 1AA; attention: Corporate Trust Administration.

         "corporation" includes corporations, associations, companies, real
estate investment trusts and business trusts.

         "coupon" means any interest coupon appertaining to a Bearer Security.

         "Custodian" has the meaning specified in Section 501.

         "Debt" of the Company or any Subsidiary means any indebtedness of the
Company or any Subsidiary, whether or not contingent, in respect of (i) borrowed
money evidenced by bonds, notes, debentures or similar instruments, (ii)
indebtedness secured by any mortgage, pledge, lien, charge, encumbrance or any
security interest existing on property owned by the Company or any Subsidiary,
(iii) reimbursement obligations in connection with any letters of credit
actually issued or amounts representing the balance deferred and unpaid of the
purchase price of any property except any such balance that constitutes an
accrued expense or trade payable or (iv) any lease of property by the Company or
any Subsidiary as lessee which is reflected on the Company's consolidated
balance sheet as a capitalized lease in accordance with GAAP; but in the case of
items of indebtedness incurred under (i) through (iii) above only to the extent
that any such items (other than letters of credit) would appear as a liability
on the Company's consolidated balance sheet in accordance with GAAP; and also
includes, to the extent not otherwise included, any obligation of the Company or
any Subsidiary to be liable for, or to pay, as obligor, guarantor or otherwise
(other than for purposes of collection in the ordinary course of business),
indebtedness of another person (other than the Company or any Subsidiary).

         "Defaulted Interest" has the meaning specified in Section 307.

         "Disqualified Stock" means, with respect to any person, any capital
stock or partnership interest of such person which by the terms of such capital
stock or partnership interest (or by the terms of any security into which it is
convertible or for which it is exchangeable or exercisable), upon the occurrence
of any event or otherwise: (i) matures or is


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<PAGE>   11



mandatorily redeemable, pursuant to a sinking fund obligation or otherwise; (ii)
is convertible into or exchangeable or exercisable for Debt or Disqualified
Stock; or (iii) is redeemable at the option of the holder thereof, in whole or
in part, in each case on or prior to the maturity of the relevant series of
Securities.

         "DTC" means The Depository Trust Company for so long as it shall be a
clearing agency registered under the Exchange Act, or such successor as the
Company shall designate from time to time in an Officer's Certificate delivered
to the Trustee.

         "Dollar" or "$" means a dollar or other equivalent unit in such coin or
currency of the United States of America as at the time shall be legal tender
for the payment of public and private debts.

         "ECU" means the European Currency Unit as defined and revised from time
to time by the Council of the European Communities.

         "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels
Office, or its successor as operator of the Euroclear System.

         "European Communities" means the European Economic Community, the
European Coal and Steel Community and the European Atomic Energy Community.

         "European Monetary System" means the European Monetary System
established by the Resolution of December 5, 1978 of the Council of the European
Communities.

         "Event of Default" has the meaning specified in Article Five.

         "Exchange Act" means the Securities Exchange Act of 1934 and any
successor statute thereto, in each case as amended from time to time and the
rules and regulations of the Commission thereunder.

         "Foreign Currency" means any currency, currency unit or composite
currency, including, without limitation, the ECU issued by the government of one
or more countries other than the United States of America or by any recognized
confederation or association of such governments.

         "GAAP" means generally accepted accounting principles, as in effect
from time to time, as used in the United States applied on a consistent basis;
provided, that solely for purposes of any calculation required by the financial
covenants contained herein, "GAAP" shall mean generally accepted accounting
principles as used in the United States on the date hereof, applied on a
consistent basis.

         "Government Obligations" means securities which are (i) direct
obligations of the United States of America or the government which issued the
Foreign Currency in which the Securities of a particular series are payable, for
the payment of which its full faith and credit is pledged or (ii) obligations of
a Person controlled or supervised by and acting as an agency or instrumentality
of the United States of America or such government which issued the Foreign


                                       -5-




<PAGE>   12



Currency in which the Securities of such series are payable, the payment of
which is unconditionally guaranteed as a full faith and credit obligation by the
United States of America or such other government, which, in either case, are
not callable or redeemable at the option of the issuer thereof, and shall also
include a depository receipt issued by a bank or trust company as custodian with
respect to any such Government Obligation or a specific payment of interest on
or principal of any such Government Obligation held by such custodian for the
account of the holder of a depository receipt, provided that (except as required
by law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depository receipt from any amount received by the
custodian in respect of the Government Obligation or the specific payment of
interest on or principal of the Government Obligation evidenced by such
depository receipt.

         "Holder" means, in the case of a Registered Security, the Person in
whose name a Security is registered in the Security Register and, in the case of
a Bearer Security, the bearer thereof and, when used with respect to any coupon,
shall mean the bearer thereof.

         "Indenture" means this instrument as originally executed or as it may
from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
and shall include the terms of particular series of Securities established as
contemplated by Section 301; provided, however, that, if at any time more than
one Person is acting as Trustee under this instrument, "Indenture" shall mean,
with respect to any one or more series of Securities for which such Person is
Trustee, this instrument as originally executed or as it may from time to time
be supplemented or amended by one or more indentures supplemental hereto entered
into pursuant to the applicable provisions hereof and shall include the terms of
the particular series of Securities for which such Person is Trustee established
as contemplated by Section 301, exclusive, however, of any provisions or terms
which relate solely to other series of Securities for which such Person is
Trustee, regardless of when such terms or provisions were adopted, and exclusive
of any provisions or terms adopted by means of one or more indentures
supplemental hereto executed and delivered after such Person had become such
Trustee but to which such Person, as such Trustee, was not a party.

         "Indexed Security" means a Security the terms of which provide that the
principal amount thereof payable at Stated Maturity may be more or less than the
principal face amount thereof at original issuance.

         "interest" when used with respect to an Original Issue Discount
Security which by its terms bears interest only after Maturity, shall mean
interest payable after Maturity, and, when used with respect to a Security which
provides for the payment of Additional Amounts pursuant to Section 1011,
includes such Additional Amounts.

         "Interest Payment Date" when used with respect to any Security, means
the Stated Maturity of an installment of interest on such Security.

         "Make-Whole Amount" means, in connection with any optional redemption
of any Securities, the excess, if any, of: (i) the aggregate present value as of
the date of such redemption of each dollar of principal being redeemed and the
amount of interest (exclusive of interest accrued to the date of redemption)
that would have been payable in respect of each such


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<PAGE>   13



dollar if such redemption had not been made, determined by discounting, on a
semi-annual basis, such principal and interest at the Reinvestment Rate
(determined on the third Business Day preceding the date notice of such
redemption is given) from the respective dates on which such principal and
interest would have been payable if such redemption had not been made, to the
date of redemption; over (ii) the aggregate principal amount of the Securities
being redeemed.

         "Maturity", when used with respect to any Security, means the date on
which the principal of such Security or an installment of principal becomes due
and payable as therein or herein provided, whether at the Stated Maturity or by
declaration of acceleration, notice of redemption, notice of option to elect
repayment or otherwise.

         "Officers' Certificate" means a certificate signed by the Chairman of
the Board of Trustees, the President or a Vice-President and by the Treasurer,
an Assistant Treasurer, the Secretary or an Assistant Secretary, of the Trust,
as general partner of the Company, and delivered to the Trustee.

         "Opinion of Counsel" means a written opinion of counsel, who may be
counsel for the Company or who may be an employee of or other counsel for the
Trust or the Company and who shall be reasonably satisfactory to the Trustee.

         "Original Issue Discount Security" means any Security which provides
for an amount less than the principal amount thereof to be due and payable upon
a declaration of acceleration of the Maturity thereof pursuant to Section 502.

         "Outstanding," when used with respect to Securities, means, as of the
date of determination, all Securities theretofore authenticated and delivered
under this Indenture, except:

                  (i)   Securities theretofore canceled by the Trustee or 
delivered to the Trustee for cancellation;

                  (ii)  Securities, or portions thereof, for whose payment or
redemption or repayment at the option of the Holder money in the necessary
amount has been theretofore deposited with the Trustee or any Paying Agent
(other than the Company) in trust or set aside and segregated in trust by the
Company (if the Company shall act as its own Paying Agent) for the Holders of
such Securities and any coupons appertaining thereto, provided that, if such
Securities are to be redeemed, notice of such redemption has been duly given
pursuant to this Indenture or provision therefor satisfactory to the Trustee has
been made;

                  (iii) Securities, except to the extent provided in Sections 
1402 and 1403, with respect to which the Company has effected defeasance and/or
covenant defeasance as provided in Article Twelve; and

                  (iv)  Securities which have been paid pursuant to Section 306
or in exchange for or in lieu of which other Securities have been authenticated
and delivered pursuant to this Indenture, other than any such Securities in
respect of which there shall have been presented to the Trustee proof
satisfactory to it that such Securities are held by a bona fide purchaser in
whose hands such Securities are valid obligations of the Company; provided,


                                       -7-




<PAGE>   14



however, that in determining whether the Holders of the requisite principal
amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder or are present at
a meeting of Holders for quorum purposes, and for the purpose of making the
calculations required by TIA Section 313, (i) the principal amount of an
Original Issue Discount Security that may be counted in making such
determination or calculation and that shall be deemed to be Outstanding for such
purpose shall be equal to the amount of principal thereof that would be (or
shall have been declared to be) due and payable, at the time of such
determination, upon a declaration of acceleration of the maturity thereof
pursuant to Section 502, (ii) the principal amount of any Security denominated
in a Foreign Currency that may be counted in making such determination or
calculation and that shall be deemed Outstanding for such purpose shall be equal
to the Dollar equivalent, determined pursuant to Section 301 as of the date such
Security is originally issued by the Company, of the principal amount (or, in
the case of an Original Issue Discount Security, the Dollar equivalent as of
such date of original issuance of the amount determined as provided in cause (i)
above) of such Security, (iii) the principal amount of any Indexed Security that
may be counted in making such determination or calculation and that shall be
deemed outstanding for such purpose shall be equal to the principal face amount
of such Indexed Security at original issuance, unless otherwise provided with
respect to such Security pursuant to Section 301, and (iv) Securities owned by
the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in making such calculation or in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Securities which the
Trustee knows to be so owned shall be so disregarded. Securities so owned which
have been pledged in good faith may be regarded as Outstanding if the pledgee
establishes to the satisfaction of the Trustee the pledgee's right so to act
with respect to such Securities and that the pledgee is not the Company or any
other obligor upon the Securities or any Affiliate of the Company or of such
other obligor.

         "Paying Agent" means any Person authorized by the Company to pay the
principal of (and premium, if any) or interest on any Securities or coupons on
behalf of the Company.

         "Person" means any individual, corporation, company, joint venture,
association, joint-stock company, trust, unincorporated organization or
government or any agency or political subdivision thereof.

         "Place of Payment," when used with respect to the Securities of or
within any series, means the place or places where the principal of (and
premium, if any) and interest on such Securities are payable as specified as
contemplated by Sections 301 and 1002.

         "Predecessor Security" of any particular Security means every previous
Security evidencing all or a portion of the same debt as that evidenced by such
particular Security; and, for the purposes of this definition, any Security
authenticated and delivered under Section 306 in exchange for or in lieu of a
mutilated, destroyed, lost or stolen Security or a Security to which a
mutilated, destroyed, lost or stolen coupon appertains shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security or
the Security to which the mutilated, destroyed, lost or stolen coupon
appertains.


                                       -8-




<PAGE>   15



         "Preferred Shares" means, with respect to any Person, capital stock or
shares of beneficial interest issued by such Person that is entitled to a
preference or priority over any other capital stock or shares of beneficial
interest issued by such Person upon any distribution of such Person's assets,
whether by dividend or upon liquidation.

         "Redemption Date," when used with respect to any Security to be
redeemed, in whole or in part, means the date fixed for such redemption by or
pursuant to this Indenture.

         "Redemption Price," when used with respect to any Security to be
redeemed, means a redemption price equal to the sum of (i) the principal amount
of the Securities being redeemed plus accrued interest thereon to the redemption
date and (ii) the Make-Whole Amount, if any, with respect to the Securities.

         "Registered Security" means any Security which is registered in the
Security Register.

         "Regular Record Date" for the interest payable on any Interest Payment
Date on the Registered Securities of or within any series means the date
specified for that purpose as contemplated by Section 301, whether or not a
Business Day.

         "Reinvestment Rate" means the yield on Treasury securities at a
constant maturity corresponding to the remaining life (as of the date of
redemption, and rounded to the nearest month) to Stated Maturity of the
principal being redeemed (the "Treasury Yield"), plus 0.25%. For purposes
hereof, the Treasury Yield shall be equal to the arithmetic mean of the yields
published in the Statistical Release under the heading "Week Ending" for "U.S.
Government Securities--Treasury Constant Maturities" with a maturity equal to
such remaining life; provided, that if no published maturity exactly corresponds
to such remaining life, then the Treasury Yield shall be interpolated or
extrapolated on a straight-line basis from the arithmetic means of the yields
for the next shortest and next longest published maturities. For purposes of
calculating the Reinvestment Rate, the most recent Statistical Release published
prior to the date of determination of the Make-Whole Amount shall be used. If
the format or content of the Statistical Release changes in a manner that
precludes determination of the Treasury Yield in the above manner, then the
Treasury Yield shall be determined in the manner that most closely approximates
the above manner, as reasonably determined by the Company.

         "Repayment Date" means, when used with respect to any Security to be
repaid at the option of the Holder, the date fixed for such repayment by or
pursuant to this Indenture.

         "Repayment Price" means, when used with respect to any Security to be
repaid at the option of the Holder, the price at which it is to be repaid by or
pursuant to this Indenture.

         "Responsible Officer," when used with respect to the Trustee, means the
chairman or vice-chairman of the board of directors, the chairman or
vice-chairman of the executive committee of the board of directors, the
president, any vice president (whether or not designated by a number or a word
or words added before or after the title "vice president"), the secretary, any
assistant secretary, the treasurer, any assistant treasurer, any trust officer
or assistant trust officer, the controller or any other officer of the Trustee
customarily performing


                                       -9-




<PAGE>   16



functions similar to those performed by any of the above designated officers and
also means, with respect to a particular corporate trust matter, any other
officer to whom such matter is referred because of such officer's knowledge and
familiarity with the particular subject.

         "Securities Act" means the Securities Act of 1933 and any successor
statute thereto, in each case as amended from time to time and the rules and
regulations of the Commission thereunder.

         "Security" has the meaning stated in the first recital of this
Indenture and, more particularly, means any Security or Securities authenticated
and delivered under this Indenture; provided, however, that, if at any time
there is more than one Person acting as Trustee under this Indenture,
"Securities" with respect to the Indenture as to which such Person is Trustee
shall have the meaning stated in the first recital of this Indenture and shall
more particularly mean Securities authenticated and delivered under this
Indenture, exclusive, however, of Securities of any series as to which such
Person is not Trustee.

         "Security Register" and "Security Registrar" have the respective
meanings specified in Section 305.

         "Significant Subsidiary" means any Subsidiary which is a "significant
subsidiary" (as defined in Article I, Rule 1-02 of Regulation S-X, promulgated
under the Securities Act) of the Company.

         "Special Record Date" for the payment of any Defaulted Interest on the
Registered Securities of or within any series means a date fixed by the Trustee
pursuant to Section 307.

         "Stated Maturity," when used with respect to any Security or any
installment of principal thereof or interest thereon, means the date specified
in such Security or a coupon representing such installment of interest as the
fixed date on which the principal of such Security or such installment of
principal or interest is due and payable.

         "Statistical Release" means the statistical release designated
"H.15(519)" or any successor publication which is published weekly by the
Federal Reserve System and which reports yields on actively traded United States
government securities adjusted to constant maturities, or, if such statistical
release is not published at the time of any determination under the Indenture,
then such other reasonably comparable index which shall be designated by the
Company.

         "Subsidiary" means a corporation, partnership or limited liability
company, a majority of the outstanding voting stock, partnership interests or
membership interests, as the case may be, of which is owned or controlled,
directly or indirectly, by the Company or by one or more Subsidiaries of the
Company. Liberty Property Development Corp. is a Subsidiary for purposes of this
definition. For the purposes of this definition, "voting stock" means stock
having the voting power for the election of directors, general partners,
managers or trustees, as the case may be, whether at all times or only so long
as no senior class of stock has such voting power by reason of any contingency.


                                      -10-




<PAGE>   17



         "Trust " means Liberty Property Trust, a self-administered and
self-managed Maryland real estate investment trust and sole general partner of
the Company.

         "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939,
as amended and as in force at the date as of which this Indenture was executed,
except as provided in Section 905.

         "Trustee" means the Person named as the "Trustee" in the first
paragraph of this Indenture until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean or include each Person who is then a Trustee hereunder;
provided, however, that if at any time there is more than one such Person,
"Trustee" as used with respect to the Securities of any series shall mean only
the Trustee with respect to Securities of that series.

         "Undepreciated Real Estate Assets" as of any date means the cost
(original cost plus capital improvements) of real estate assets of the Company
and its Subsidiaries on such date, before depreciation and amortization,
determined on a consolidated basis in accordance with GAAP.

         "Unencumbered Total Asset Value" as of any date means the sum of (i)
the value of those Undepreciated Real Estate Assets not subject to an
encumbrance and (ii) the value of all other assets of the Company and its
Subsidiaries on a consolidated basis not subject to an encumbrance determined in
accordance with GAAP (but excluding accounts receivable and intangibles).

         "United States" means, unless otherwise specified with respect to any
Securities pursuant to Section 301, the United States of America (including the
states and the District of Columbia), its territories, its possessions and other
areas subject to its jurisdiction.

         "United States person" means, unless otherwise specified with respect
to any Securities pursuant to Section 301, an individual who is a citizen or
resident of the United States, a corporation, company or other entity created or
organized in or under the laws of the United States or an estate or trust the
income of which is subject to United States federal income taxation regardless
of its source.

         "Yield to Maturity" means the yield to maturity, computed at the time
of issuance of a Security (or, if applicable, at the most recent redetermination
of interest on such Security) and as set forth in such Security in accordance
with generally accepted United States bond yield computation principles.

         SECTION 102. Compliance Certificates and Opinions. Upon any application
or request by the Company to the Trustee to take any action under any provision
of this Indenture, the Company shall furnish to the Trustee an Officers'
Certificate stating that all conditions precedent, if any, provided for in this
Indenture relating to the proposed action have been complied with and an Opinion
of Counsel stating that in the opinion of such counsel all such conditions
precedent, if any, have been complied with, except that in the case of any such
application or request as to which the furnishing of such documents is
specifically required by


                                      -11-




<PAGE>   18



any provision of this Indenture relating to such particular application or
request, no additional certificate or opinion need be furnished.

         Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture (including certificates
delivered pursuant to Section 1010) shall include:

         (1) a statement that each individual signing such certificate or
opinion has read such condition or covenant and the definitions herein relating
thereto;

         (2) a brief statement as to the nature and scope of the examination or
investigation upon which the statements or opinions contained in such
certificate or opinion are based;

         (3) a statement that, in the opinion of each such individual, he has
made such examination or investigation as is necessary to enable him to express
an informed opinion as to whether or not such condition or covenant has been
complied with; and

         (4) a statement as to whether, in the opinion of each such individual,
such condition or covenant has been complied with.

         SECTION 103. Form of Documents Delivered to Trustee. In any case where
several matters are required to be certified by, or covered by an opinion of,
any specified Person, it is not necessary that all such matters be certified by,
or covered by the opinion of, only one such Person, or that they be so certified
or covered by only one document, but one such Person may certify or give an
opinion as to some matters and one or more other such Persons as to other
matters, and any such Person may certify or give an opinion as to such matters
in one or several documents.

         Any certificate or opinion of an officer of the Company may be based,
insofar as it relates to legal matters, upon an Opinion of Counsel, or a
certificate or representations by counsel, unless such officer knows, or in the
exercise of reasonable care should know, that the opinion, certificate or
representations with respect to the matters upon which his certificate or
opinion is based are erroneous. Any such Opinion of Counsel or certificate or
representations may be based, insofar as it relates to factual matters, upon a
certificate or opinion of, or representations by, an officer or officers of the
Company stating that the information as to such factual matters is in the
possession of the Company, unless such counsel knows that the certificate or
opinion or representations as to such matters are erroneous.

         Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

         SECTION 104. Acts of Holders.

         (a) Any request, demand, authorization, direction, notice, consent,
waiver or other action provided by this Indenture to be given or taken by
Holders of the


                                      -12-




<PAGE>   19



Outstanding Securities of all series or one or more series, as the case may be,
may be embodied in and evidenced by one or more instruments of substantially
similar tenor signed by such Holders in person or by agents duly appointed in
writing. If Securities of a series are issuable as Bearer Securities, any
request, demand, authorization, direction, notice, consent, waiver or other
action provided by this Indenture to be given or taken by Holders of Securities
of such series may, alternatively, be embodied in and evidenced by the record of
Holders of Securities of such series voting in favor thereof, either in person
or by proxies duly appointed in writing, at any meeting of Holders of Securities
of such series duly called and held in accordance with the provisions of Article
Fifteen, or a combination of such instruments and any such record. Except as
herein otherwise expressly provided, such action shall become effective when
such instrument or instruments or record or both are delivered to the Trustee
and, where it is hereby expressly required, to the Company. Such instrument or
instruments and any such record (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders signing
such instrument or instruments or so voting at any such meeting. Proof of
execution of any such instrument or of a writing appointing any such agent, or
of the holding by any Person of a Security, shall be sufficient for any purpose
of this Indenture and conclusive in favor of the Trustee and the Company and any
agent of the Trustee or the Company, if made in the manner provided in this
Section. The record of any meeting of Holders of Securities shall be proved in
the manner provided in Section 1506.

         (b) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be proved
in any other reasonable manner which the Trustee deems sufficient.

         (c) The ownership of Registered Securities shall be proved by the
Security Register.

         (d) The ownership of Bearer Securities may be proved by the production
of such Bearer Securities or by a certificate executed, as depositary, by any
trust company, bank, banker or other depositary, wherever situated, if such
certificate shall be deemed by the Trustee to be satisfactory, showing that at
the date therein mentioned such Person had on deposit with such depositary, or
exhibited to it, the Bearer Securities therein described; or such facts may be
proved by the certificate or affidavit of the Person holding such Bearer
Securities, if such certificate or affidavit is deemed by the Trustee to be
satisfactory. The Trustee and the Company may assume that such ownership of any
Bearer Security continues until (1) another certificate or affidavit bearing a
later date issued in respect of the same Bearer Security is produced, or (2)
such Bearer Security is produced to the Trustee by some other Person, or (3)
such Bearer Security is surrendered in exchange for a Registered Security, or
(4) such Bearer Security is no longer Outstanding. The ownership of Bearer
Securities may also be proved in any other manner which the Trustee deems
sufficient.


                                      -13-




<PAGE>   20



         (e) If the Company shall solicit from the Holders of Registered
Securities any request, demand, authorization, direction, notice, consent,
waiver or other Act, the Company may, at its option, in or pursuant to a Board
Resolution, fix in advance a record date for the determination of Holders
entitled to give such request, demand, authorization, direction, notice,
consent, waiver or other Act, but the Company shall have no obligation to do so.
Notwithstanding TIA Section 316(c), such record date shall be the record date
specified in or pursuant to such Board Resolution, which shall be a date not
earlier than the date 30 days prior to the first solicitation of Holders
generally in connection therewith and not later than the date such solicitation
is completed. If such a record date is fixed, such request, demand,
authorization, direction, notice, consent, waiver or other Act may be given
before or after such record date, but only the Holders of record at the close of
business on such record date shall be deemed to be Holders for the purposes of
determining whether Holders of the requisite proportion of Outstanding
Securities have authorized or agreed or consented to such request, demand,
authorization, direction, notice, consent, waiver or other Act, and for that
purpose the Outstanding Securities shall be computed as of such record date;
provided that no such authorization, agreement or consent by the Holders on such
record date shall be deemed effective unless it shall become effective pursuant
to the provisions of this Indenture not later than eleven months after the
record date.

         (f) Any request, demand, authorization, direction, notice, consent,
waiver or other Act of the Holder of any Security shall bind every future Holder
of the same Security and the Holder of every Security issued upon the
registration of transfer thereof or in exchange therefor or in lieu thereof in
respect of anything done, omitted or suffered to be done by the Trustee, any
Security Registrar, any Paying Agent, any Authenticating Agent or the Company in
reliance thereon, whether or not notation of such action is made upon such
Security.

         SECTION 105. Notices, etc., to Trustee and Company. Any request,
demand, authorization, direction, notice, consent, waiver or other Act of
Holders or other document provided or permitted by this Indenture to be made
upon, given or furnished to, or filed with,

         (1) the Trustee by any Holder or by the Company shall be sufficient for
every purpose hereunder if made, given, furnished or filed in writing to or with
the Trustee at its Corporate Trust Office, or

         (2) the Company by the Trustee or by any Holder shall be sufficient for
every purpose hereunder (unless otherwise herein expressly provided) if in
writing and mailed, first class postage prepaid, to the Company addressed to it
at the address of its principal office specified in the first paragraph of this
Indenture or at any other address previously furnished in writing to the Trustee
by the Company.

         SECTION 106. Notice to Holders; Waiver. Where this Indenture provides
for notice of any event to Holders of Registered Securities by the Company or
the Trustee, such notice shall be sufficiently given (unless otherwise herein
expressly provided) if in writing and mailed, first-class postage prepaid, to
each such Holder affected by such event, at his address as it appears in the
Security Register, not later than the latest date, and not earlier than the
earliest date, prescribed for the giving of such notice. In any case where
notice to Holders of Registered


                                      -14-




<PAGE>   21



Securities is given by mail, neither the failure to mail such notice, nor any
defect in any notice, nor any defect in any notice so mailed, to any particular
Holder shall affect the sufficiency of such notice with respect to other Holders
of Registered Securities or the sufficiency of any notice to Holders of Bearer
Securities given as provided herein. Any notice mailed to a Holder in the manner
herein prescribed shall be conclusively deemed to have been received by such
Holder, whether or not such Holder actually receives such notice.

         If by reason of the suspension of or irregularities in regular mail
service or by reason of any other cause it shall be impracticable to give such
notice by mail, then such notification to Holders of Registered Securities as
shall be made with the approval of the Trustee shall constitute a sufficient
notification to such Holders for every purpose hereunder.

         Except as otherwise expressly provided herein or otherwise specified
with respect to any Securities pursuant to Section 301, where this Indenture
provides for notice to Holders of Bearer Securities of any event, such notice
shall be sufficiently given if published in an Authorized Newspaper in The City
of New York and in such other city or cities as may be specified in such
Securities on a Business Day, such publication to be not later than the latest
date, and not earlier than the earliest date, prescribed for the giving of such
notice. Any such notice shall be deemed to have been given on the date of such
publication or, if published more than once, on the date of the first such
publication.

         If by reason of the suspension of publication of any Authorized
Newspaper or Authorized Newspapers or by reason of any other cause it shall be
impracticable to publish any notice to Holders of Bearer Securities as provided
above, then such notification to Holders of Bearer Securities as shall be given
with the approval of the Trustee shall constitute sufficient notice to such
Holders for every purpose hereunder. Neither the failure to give notice by
publication to any particular Holder of Bearer Securities as provided above, nor
any defect in any notice so published, shall affect the sufficiency of such
notice with respect to other Holders of Bearer Securities or the sufficiency of
any notice to Holders of Registered Securities given as provided herein.

         Any request, demand, authorization, direction, notice, consent or
waiver required or permitted under this Indenture shall be in the English
language, except that any published notice may be in an official language of the
country of publication.

         Where this Indenture provides for notice in any manner, such notice may
be waived in writing by the Person entitled to receive such notice, either
before or after the event, and such waiver shall be the equivalent of such
notice. Waivers of notice by Holders shall be filed with the Trustee, but such
filing shall not be a condition precedent to the validity of any action taken in
reliance upon such waiver.

         SECTION 107. Effect of Headings and Table of Contents. The Article and
Section headings herein and the Table of Contents are for convenience only and
shall not affect the construction hereof.


                                      -15-




<PAGE>   22



         SECTION 108. Successors and Assigns. All covenants and agreements in
this Indenture by the Company shall be binding on their successors and assigns,
whether so expressed or not.

         SECTION 109. Separability Clause. In case any provision in this
Indenture or in any Security or coupon shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

         SECTION 110. Benefits of Indenture. Nothing in this Indenture, in the
Securities or coupons, express or implied, shall give to any Person, other than
the Parties hereto, any Security Registrar, any Paying Agent, any Authenticating
Agent and their successors hereunder and the Holders any benefit or any legal or
equitable right, remedy or claim under this Indenture.

         SECTION 111. Non-Recourse. Notwithstanding anything contained herein to
the contrary, no recourse under or upon any obligation, covenant or agreement
contained in this Indenture, in any Security or coupon appertaining thereto, or
because of any indebtedness evidenced thereby (including, without limitation,
any obligation or indebtedness relating to the principal of, or premium or
Make-Whole Amount, if any, interest or any other amounts due, or claimed to be
due, on any Security issued hereunder), or for any claim based thereon or
otherwise in respect thereof, shall be had (i) against the Trust or any other
partner in the Company, (ii) against any Person which owns an interest, directly
or indirectly, in any partner in the Company or (iii) against any promoter, as
such, or against any past, present or future shareholder, officer, director or
partner, as such, of the Company, the Trust or of any successor, either directly
or through the Company, the Trust or any successor, under any rule of law,
statute or constitutional provision or by the enforcement of any assessment or
by any legal or equitable proceeding or otherwise, all such liability being
expressly waived and released by the acceptance of the Securities by the Holders
thereof and as part of the consideration for the issue of the Securities. The
Holders of the Securities hereunder acknowledge by the acceptance of the
Securities that their sole remedies under this Indenture for any Default by the
Company in the payment of the principal of, or any premium or Make-Whole Amount,
if any, interest or any amounts due, or claimed to be due, on any Security, or
otherwise, are limited to claims against the property of the Company as provided
in Section 503 hereof.

         SECTION 112. Governing Law. This Indenture and the Securities and
coupons shall be governed by and construed in accordance with the law of the
State of New York. This Indenture is subject to the provisions of the TIA that
are required to be part of this Indenture and shall, to the extent applicable,
be governed by such provisions.

         SECTION 113. Legal Holidays. In any case where any Interest Payment
Date, Redemption Date, Repayment Date, sinking fund payment date, Stated
Maturity or Maturity of any Security shall not be a Business Day at any Place of
Payment, then (notwithstanding any other provision of this Indenture or any
Security or coupon other than a provision in the Securities of any series which
specifically states that such provision shall apply in lieu hereof), payment of
interest or any Additional Amounts or principal (and premium, if any) need not
be made at such Place of Payment on such date, but may be made on the next
succeeding Business Day at such Place of Payment with the same force and effect
as if made on the Interest Payment


                                      -16-




<PAGE>   23



Date, Redemption Date, Repayment Date or sinking fund payment date, or at the
Stated Maturity or Maturity, provided that no interest shall accrue on the
amount so payable for the period from and after such Interest Payment Date,
Redemption Date, Repayment Date, sinking fund payment date, Stated Maturity or
Maturity, as the case may be.

                                   ARTICLE TWO

                                SECURITIES FORMS

         SECTION 201. Forms of Securities. The Registered Securities, if any, of
each series and the Bearer Securities, if any, of each series and related
coupons shall be in substantially the forms as shall be established in one or
more indentures supplemental hereto or approved from time to time by or pursuant
to a Board Resolution in accordance with this Indenture, shall have such
appropriate insertions, omissions, substitutions and other variations as are
required or permitted by this Indenture or any indenture supplemental hereto,
and may have such letters, numbers or other marks of identification or
designation and such legends or endorsements placed thereon as the Company may
deem appropriate and as are not inconsistent with the provisions of this
Indenture, or as may be required to comply with any law or with any rule or
regulation made pursuant thereto or with any rule or regulation of any stock
exchange on which the Securities may be listed, or to conform to usage.

         Unless otherwise specified as contemplated by Section 301, Bearer
Securities shall have interest coupons attached.

         The definitive Securities and coupons shall be printed, lithographed or
engraved or produced by any combination of these methods on a steel engraved
border or steel engraved borders or may be produced in any other manner, all as
determined by the officers executing such Securities or coupons, as evidenced by
their execution of such Securities or coupons.

         SECTION 202. Form of Trustee's Certificate of Authentication. Subject
to Section 611, the Trustee's certificate of authentication shall be
insubstantially the following form:

         This is one of the Securities of the series designated herein referred
to in the within-mentioned Indenture.

                           The First National Bank of Chicago, as Trustee




                           By:
                              ------------------------------------------
                              Authorized Signatory

         SECTION 203. Securities Issuable in Global Form. If Securities of or
within a series are issuable in global form, as specified as contemplated by
Section 301, then, notwithstanding clause (8) of Section 301 and the provisions
of Section 302, any such Security shall represent such of the Outstanding
Securities of such series as shall be specified therein and


                                      -17-




<PAGE>   24



may provide that it shall represent the aggregate amount of Outstanding
Securities of such series from time to time endorsed thereon and that the
aggregate amount of Outstanding Securities of such series represented thereby
may from time to time be increased or decreased to reflect exchanges. Any
endorsement of a Security in global form to reflect the amount, or any increase
or decrease in the amount, of Outstanding Securities represented thereby shall
be made by the Trustee in such manner and upon instructions given by such Person
or Persons as shall be specified therein or in the Company Order to be delivered
to the Trustee pursuant to Section 303 or 304. Subject to the provisions of
Section 303 and, if applicable, Section 304, the Trustee shall deliver and
redeliver any Security in permanent global form in the manner and upon
instructions given by the Person or Persons specified therein or in the
applicable Company Order. If a Company Order pursuant to Section 303 or 304 has
been, or simultaneously is, delivered, any instructions by the Company with
respect to endorsement or delivery or redelivery of a Security in global form
shall be in writing but need not comply with Section 102 and need not be
accompanied by an Opinion of Counsel.

         The provisions of the last sentence of Section 303 shall apply to any
security represented by a Security in global form if such Security was never
issued and sold by the Company and the Company delivers to the Trustee the
security in global form together with written instructions (which need not
comply with Section 102 and need not be accompanied by an Opinion of Counsel)
with regard to the reduction in the principal amount of Securities represented
thereby, together with the written statement contemplated by the last sentence
of Section 303.

         Notwithstanding the provisions of Section 307, unless otherwise
specified as contemplated by Section 301, payment of principal of and any
premium and interest on any Security in permanent global form shall be made to
the Person or Persons specified therein.

         Notwithstanding the provisions of Section 308 and except as provided in
the preceding paragraph, the Company, the Trustee and any agent of the Company
and the Trustee shall treat as the Holder of such principal amount of
Outstanding Securities represented by a permanent global Security (i) in the
case of a permanent global Security in registered form, the Holder of such
permanent global Security in registered form, or (ii) in the case of a permanent
global Security in bearer form, Euroclear and/or CEDEL.

                                  ARTICLE THREE

                                 THE SECURITIES

         SECTION 301. Amount Unlimited; Issuable in Series. The aggregate
principal amount of Securities which may be authenticated and delivered under
this Indenture is unlimited.

         The Securities may be issued in one or more series. There shall be
established in one or more Board Resolutions or pursuant to authority granted by
one or more Board Resolutions and, subject to Section 303, set forth, or
determined in the manner provided, in an Officers' Certificate, or established
in one or more indentures supplemental hereto, prior to the issuance of
Securities of any series, any or all of the following, as applicable (each of
which (except for the matters set forth in clauses (1), (2) and (15) below), if
so provided, may be


                                      -18-




<PAGE>   25



determined from time to time by the Company with respect to unissued Securities
of the series when issued from time to time):

         (1) the title of the Securities of the series (which shall distinguish
the Securities of such series from all other series of Securities);

         (2) any limit upon the aggregate principal amount of the Securities of
the series that may be authenticated and delivered under this Indenture (except
for Securities authenticated and delivered upon registration of transfer of, or
in exchange for, or in lieu of, other Securities of the series pursuant to
Section 304, 305, 306, 906, 1107 or 1305);

         (3) the date or dates, or the method by which such date or dates will
be determined, on which the principal of the Securities of the series shall be
payable;

         (4) the rate or rates at which the Securities of the series shall bear
interest, if any, or the method by which such rate or rates shall be determined,
the date or dates from which such interest shall accrue or the method by which
such date or dates shall be determined, the Interest Payment Dates on which such
interest will be payable and the Regular Record Date, if any, for the interest
payable on any Registered Security on any Interest Payment Date, or the method
by which such date shall be determined, and the basis upon which interest shall
be calculated if other than that of a 360-day year of twelve 30-day months;

         (5) the place or places, if any, other than or in addition to the
Borough of Manhattan, The City of New York, where the principal of (and premium
or Make-Whole Amount, if any), interest, if any, on, and Additional Amounts, if
any, payable in respect of, Securities of the series shall be payable, any
Registered Securities of the series may be surrendered for registration of
transfer, exchange or conversion and notices or demands to or upon the Company
in respect of the Securities of the series and this Indenture may be served;

         (6) the period or periods within which, the price or prices at which,
the currency or currencies, currency unit or units or composite currency or
currencies in which, and other terms and conditions upon which Securities of the
series may be redeemed, in whole or in part, at the option of the Company, if
the Company is to have the option;

         (7) the obligation, if any, of the Company to redeem, repay or purchase
Securities of the series pursuant to any provision or at the option of a Holder
thereof, and the period or periods within which or the date or dates on which,
the price or prices at which, the currency or currencies, currency unit or units
or composite currency or currencies in which, and other terms and conditions
upon which Securities of the series shall be redeemed, repaid or purchased
(including without limitation whether, and the extent to which, the premium
shall be payable in connection therewith), in whole or in part, pursuant to such
obligation.

         (8) if other than denominations of $1,000 and any integral multiple
thereof, the denominations in which any Registered Securities of the series
shall be issuable and, if other than the denomination of $5,000, the
denomination or denominations in which any Bearer Securities of the series shall
be issuable;


                                      -19-




<PAGE>   26



         (9)  if other than the Trustee, the identity of each Security Registrar
and/or Paying Agent;

         (10) if other than the principal amount thereof, the portion of the
principal amount of Securities of the series that shall be payable upon
declaration of acceleration of the Maturity thereof pursuant to Section 502 or
the method by which such portion shall be determined;

         (11) if other than Dollars, the Foreign Currency or Currencies in which
payment of the principal of (and premium or Make-Whole Amount, if any) or
interest or Additional Amounts, if any, on the Securities of the series shall be
payable or in which the Securities of the series shall be denominated;

         (12) whether the amount of payments of principal of (and premium or
Make- Whole Amount, if any) or interest, if any, on the Securities of the series
may be determined with reference to an index, formula or other method (which
index, formula or method may be based, without limitation, on one or more
currencies, currency units, composite currencies, commodities, equity indices or
other indices), and the manner in which such amounts shall be determined;

         (13) whether the principal of (and premium or Make-Whole Amount, if
any) or interest or Additional Amounts, if any, on the Securities of the series
are to be payable, at the election of the Company, or a Holder thereof, in a
currency or currencies, currency unit or units or composite currency or
currencies other than that in which such Securities are denominated or stated to
be payable, the period or periods within which, and the terms and conditions
upon which, such election may be made, and the time and manner of, and identity
of the exchange rate agent with responsibility for, determining the exchange
rate between the currency or currencies, currency unit or units or composite
currency or currencies in which such Securities are denominated or stated to be
payable and the currency or currencies, currency unit or units or composite
currency or currencies in which such Securities are to be so payable;

         (14) provisions, if any, granting special rights to the Holders of
Securities of the series upon the occurrence of such events as may be specified;

         (15) any deletions from, modifications of or additions to the Events of
Default or covenants of the Company with respect to Securities of the series,
whether or not such Events of Default or covenants are consistent with the
Events of Default or covenants set forth herein;

         (16) whether Securities of the series are to be issuable as Registered
Securities, Bearer Securities (with or without coupons) or both, any
restrictions applicable to the offer, sale or delivery of Bearer Securities and
the terms upon which Bearer Securities of the series may be exchanged for
Registered Securities of the series and vice versa (if permitted by applicable
laws and regulations), whether any Securities of the series are to be issuable
initially in temporary global form and whether any Securities of the series are
to be issuable in permanent global form with or without coupons and, if so,
whether beneficial owners of interests in any such permanent global Security may
exchange such interests for Securities of such series and of like tenor of any
authorized form and denomination and the circumstances under which any such
exchanges may


                                      -20-


<PAGE>   27
occur, if other than in the manner provided in Section 305, and, if Registered
Securities of the series are to be issuable as a global Security, the identity
of the depositary for such series;

                  (17) the date as of which any Bearer Securities of the series
and any temporary global Security representing Outstanding Securities of the
series shall be dated if other than the date of original issuance of the first
Security of the series to be issued;

                  (18) the Person to whom any interest on any Registered
Security of the series shall be payable, if other than the Person in whose name
that Security (or one or more Predecessor Securities) is registered at the close
of business on the Regular Record Date for such interest, the manner in which,
or the Person to whom, any interest on any Bearer Security of the series shall
be payable, if otherwise than upon presentation and surrender of the coupons
appertaining thereto as they severally mature, and the extent to which, or the
manner in which, any interest payable on a temporary global Security on an
Interest Payment Date will be paid if other than in the manner provided in
Section 304;

                  (19) the applicability, if any, of Sections 1402 and/or 1403
to the Securities of the series and any provisions in modification of, in
addition to or in lieu of any of the provisions of Article Fourteen;

                  (20) if the Securities of such series are to be issuable in
definitive form (whether upon original issue or upon exchange of a temporary
Security of such series) only upon receipt of certain certificates or other
documents or satisfaction of other conditions, then the form and/or terms of
such certificates, documents or conditions;

                  (21) if the Securities of the series are to be issued upon the
exercise of warrants, the time, manner and place for such Securities to be
authenticated and delivered;

                  (22) whether and under what circumstances the Company will pay
Additional Amounts as contemplated by Section 1011 on the Securities of the
series to any Holder who is not a United States person (including any
modification to the definition of such term) in respect of any tax, assessment
or governmental charge and, if so, whether the Company will have the option to
redeem such Securities rather than pay such Additional Amounts (and the terms of
any such option);

                  (23) the terms and conditions, if any, upon which such
Securities may be subordinated to other indebtedness of the Company;

                  (24) the terms and conditions, if any, for securing all or any
portion of the indebtedness evidenced by the Securities of the series; and

                  (25) any other terms of the series (which terms shall not be
inconsistent with the provisions of this Indenture).

                  All Securities of any one series and the coupons appertaining
to any Bearer Securities of such series shall be substantially identical except,
in the case of Registered Securities, as to denomination and except as may
otherwise be provided in or pursuant to such


                                      -21-

<PAGE>   28



Board Resolution (subject to Section 303) and set forth in such Officers'
Certificate or in any such indenture supplemental hereto. All Securities of any
one series need not be issued at the same time and, unless otherwise provided, a
series may be reopened, without the consent of the Holders, for issuances of
additional Securities of such series.

                  If any of the terms of the Securities of any series are
established by action taken pursuant to one or more Board Resolutions, a copy of
an appropriate record of such action(s) shall be certified by the Secretary or
an Assistant Secretary of the Company on behalf of the Company and delivered to
the Trustee at or prior to the delivery of the Officers' Certificate setting
forth the terms of the Securities of such series.

                  SECTION 302. Denominations. The Securities of each series
shall be issuable in such denominations as shall be specified as contemplated by
Section 301. With respect to Securities of any series denominated in Dollars, in
the absence of any such provisions with respect to the Securities of any series,
the Registered Securities of such series, other than Registered Securities
issued in global form (which may be of any denomination), shall be issuable in
denominations of $1,000 and any integral multiple thereof and the Bearer
Securities of such series, other than Bearer Securities issued in global form
(which may be of any denomination), shall be issuable in a denomination of
$5,000.

                  SECTION 303. Execution, Authentication, Delivery and Dating.
The Securities and any coupons appertaining thereto shall be executed by the
Chairman of the Board, and President or one of the Executive Vice Presidents,
and the Chief Financial Officer of the Trust, as general partner of the Company.
The signature of any of these officers on the Securities and coupons may be
manual or facsimile signatures of the present or any future such authorized
officer and may be imprinted or otherwise reproduced on the Securities.

                  Securities or coupons bearing the manual or facsimile
signatures of individuals who were at any time the proper officers of the Trust
shall bind the Company, notwithstanding that such individuals or any of them
have ceased to hold such offices prior to the authentication and delivery of
such Securities and did not hold such offices at the date of such Securities or
coupons.

                  At any time and from time to time after the execution and
delivery of this Indenture, the Company may deliver Securities of any series,
together with any coupon appertaining thereto, executed by the Company to the
Trustee for authentication, together with a Company Order for the authentication
and delivery of such Securities, and the Trustee in accordance with the Company
Order shall authenticate and deliver such Securities; provided, however, that,
in connection with its original issuance, no Bearer Security shall be mailed or
otherwise delivered to any location in the United States; and provided further
that, unless otherwise specified with respect to any series of Securities
pursuant to Section 301, a Bearer Security may be delivered in connection with
its original issuance only if the Person entitled to receive such Bearer
Security shall have furnished a certificate to Euroclear or CEDEL, as the case
may be, in the form set forth in Exhibit A-1 to this Indenture or such other
certificate as may be specified with respect to any series of Securities
pursuant to Section 301, dated no earlier than 15 days prior to the earlier of
the date on which such Bearer Security is delivered and the date on which any
temporary Security first becomes exchangeable for such Bearer Security in

                                      -22-

<PAGE>   29



accordance with the terms of such temporary Security and this Indenture. If any
Security shall be represented by a permanent global Bearer Security, then, for
purposes of this Section and Section 304, the notation of a beneficial owner's
interest therein upon original issuance of such Security or upon exchange of a
portion of a temporary global Security shall be deemed to be delivery in
connection with its original issuance of such beneficial owner's interest in
such permanent global Security. Except as permitted by Section 306, the Trustee
shall not authenticate and deliver any Bearer Security unless all appurtenant
coupons for interest then matured have been detached and canceled.

                  If all the Securities of any series are not to be issued at
one time and if the Board Resolution or supplemental indenture establishing such
series shall so permit, such Company Order may set forth procedures acceptable
to the Trustee for the issuance of such Securities and determining the terms of
particular Securities of such series, such as interest rate or formula, maturity
date, date of issuance and date from which interest shall accrue. In
authenticating such Securities, and accepting the additional responsibilities
under this Indenture in relation to such Securities, the Trustee shall be
entitled to receive, and (subject to TIA Section 315(a) through 315(d)) shall be
fully protected in relying upon,

                           (i)  an Opinion of Counsel complying with Section 102
and stating that

                                    (a) the form or forms of such Securities and
any coupons have been established in conformity with the provisions of this
Indenture;

                                    (b) the terms of such Securities and any
coupons have been established in conformity with the provisions of this
Indenture; and

                                    (c) such Securities, together with any 
coupons appertaining thereto, when completed by appropriate insertions and
executed and delivered by the Company to the Trustee for authentication in
accordance with this Indenture, authenticated and delivered by the Trustee in
accordance with this Indenture and issued by the Company in the manner and
subject to any conditions specified in such Opinion of Counsel, will constitute
valid and binding obligations of the Company, enforceable in accordance with
their terms, subject to applicable bankruptcy, insolvency, reorganization and
other similar laws of general applicability relating to or affecting the
enforcement of creditors' rights generally and to general equitable principles;
and

                           (ii) an Officers' Certificate stating that all 
conditions precedent provided for in this Indenture relating to the issuance of
the Securities have been complied with and that, to the best of the knowledge of
the signers of such certificate, no Event of Default with respect to any of the
Securities shall have occurred and be continuing.

                  If such form or terms have been so established, the Trustee
shall not be required to authenticate such Securities if the issue of such
Securities pursuant to this Indenture will affect the Trustee's own rights,
duties, obligations or immunities under the Securities and this Indenture or
otherwise in a manner which is not reasonably acceptable to the Trustee.


                                      -23-

<PAGE>   30



                  Notwithstanding the provisions of Section 301 and of the
preceding paragraph, if all the Securities of any series are not to be issued at
one time, it shall not be necessary to deliver an Officers' Certificate
otherwise required pursuant to Section 301 or a Company Order, or an Opinion of
Counsel or an Officers' Certificate otherwise required pursuant to the preceding
paragraph at the time of issuance of each Security of such series, but such
order, opinion and certificates, with appropriate modifications to cover such
future issuances, shall be delivered at or before the time of issuance of the
first Security of such series.

                  Each Registered Security shall be dated the date of its
authentication and each Bearer Security shall be dated as of the date specified
as contemplated by Section 301.

                  No Security or coupon shall be entitled to any benefit under
this Indenture or be valid or obligatory for any purpose unless there appears on
such Security or Security to which such coupon appertains a certificate of
authentication substantially in the form provided for herein duly executed by
the Trustee by manual signature of an authorized signatory, and such certificate
upon any Security shall be conclusive evidence, and the only evidence, that such
Security has been duly authenticated and delivered hereunder and is entitled to
the benefits of this Indenture. Notwithstanding the foregoing, if any Security
shall have been authenticated and delivered hereunder but never issued and sold
by the Company, and the Company shall deliver such Security to the Trustee for
cancellation as provided in Section 309 together with a written statement (which
need not comply with Section 102 and need not be accompanied by an Opinion of
Counsel) stating that such Security has never been issued and sold by the
Company, for all purposes of this Indenture such Security shall be deemed never
to have been authenticated and delivered hereunder and shall never be entitled
to the benefits of this Indenture.

                  SECTION 304. Temporary Securities. (a) Pending the preparation
of definitive Securities of any series, the Company may execute, and upon
Company Order, the Trustee shall authenticate and deliver, temporary Securities
which are printed, lithographed, typewritten, mimeographed or otherwise
produced, in any authorized denomination, substantially of the tenor of the
definitive Securities in lieu of which they are issued, in registered form, or,
if authorized, in bearer form with one or more coupons or without coupons, and
with such appropriate insertions, omissions, substitutions and other variations
as the officers executing such Securities may determine, as conclusively
evidenced by their execution of such Securities. In the case of Securities of
any series, such temporary Securities may be in global form.

                  Except in the case of temporary Securities in global form
(which shall be exchanged in accordance with Section 304(b) or as otherwise
provided in or pursuant to a Board Resolution), if temporary Securities of any
series are issued, the Company will cause definitive Securities of that series
to be prepared without unreasonable delay. After the preparation of definitive
Securities of such series, the temporary Securities of such series shall be
exchangeable for definitive Securities of such series upon surrender of the
temporary Securities of such series at the office or agency of the Company in a
Place of Payment for that series, without charge to the Holder. Upon surrender
for cancellation of any one or more temporary Securities of any series
(accompanied by any non-matured coupons appertaining thereto), the Company shall
execute and the Trustee shall authenticate and deliver in exchange therefor a
like principal amount of definitive Securities of the same series of authorized
denominations; provided, however, that no definitive Bearer Security shall be
delivered in exchange for a temporary


                                      -24-

<PAGE>   31



Registered Security; and provided further that a definitive Bearer Security
shall be delivered in exchange for a temporary Bearer Security only in
compliance with the conditions set forth in Section 303. Until so exchanged, the
temporary Securities of any series shall in all respects be entitled to the same
benefits under this Indenture as definitive Securities of such series.

                           (b) Unless otherwise provided in or pursuant to a
Board Resolution, this Section 304(b) shall govern the exchange of temporary
Securities issued in global form other than through the facilities of The
Depository Trust Company. If any such temporary Security is issued in global
form, then such temporary global Security shall, unless otherwise provided
therein, be delivered to the London office of a depositary or common depositary
(the "Common Depositary"), for the benefit of Euroclear and CEDEL, for credit to
the respective accounts of the beneficial owners of such Securities (or to such
other accounts as they may direct).

                           Without unnecessary delay but in any event not later
than the date specified in, or determined pursuant to the terms of, any such
temporary global Security (the "Exchange Date"), the Company shall deliver to
the Trustee definitive Securities, in aggregate principal amount equal to the
principal amount of such temporary global Security, executed by the Company. On
or after the Exchange Date, such temporary global Security shall be surrendered
by the Common Depositary to the Trustee, as the Company's agent for such
purpose, to be exchanged, in whole or from time to time in part, for definitive
Securities without charge, and the Trustee shall authenticate and deliver, in
exchange for each portion of such temporary global Security, an equal aggregate
principal amount of definitive Securities of the same series of authorized
denominations and of like tenor as the portion of such temporary global Security
to be exchanged. The definitive Securities to be delivered in exchange for any
such temporary global Security shall be in bearer form, registered form,
permanent global bearer form or permanent global registered form, or any
combination thereof, as specified as contemplated by Section 301, and, if any
combination thereof is so specified, as requested by the beneficial owner
thereof; provided, however, that, unless otherwise specified in such temporary
global Security, upon such presentation by the Common Depositary, such temporary
global Security is accompanied by a certificate dated the Exchange Date or a
subsequent date and signed by Euroclear as to the portion of such temporary
global Security held for its account then to be exchanged and a certificate
dated the Exchange Date or a subsequent date and signed by CEDEL as to the
portion of such temporary global Security held for its account then to be
exchanged, each in the form set forth in Exhibit A-2 to this Indenture or in
such other form as may be established pursuant to Section 301; and provided
further that definitive Bearer Securities shall be delivered in exchange for a
portion of a temporary global Security only in compliance with the requirements
of Section 303.

                  Unless otherwise specified in such temporary global Security,
the interest of a beneficial owner of Securities of a series in a temporary
global Security shall be exchanged for definitive Securities of the same series
and of like tenor following the Exchange Date when the account holder instructs
Euroclear or CEDEL, as the case may be, to request such exchange on his behalf
and delivers to Euroclear or CEDEL, as the case may be, a certificate in the
form set forth in Exhibit A-1 to this Indenture (or in such other form as may be
established pursuant to Section 301), dated no earlier than 15 days prior to the
Exchange Date, copies of which certificate shall be available from the offices
of Euroclear and CEDEL, the Trustee, any Authenticating Agent appointed for such
series of Securities and each Paying Agent. Unless


                                      -25-

<PAGE>   32



otherwise specified in such temporary global Security, any such exchange shall
be made free of charge to the beneficial owners of such temporary global
Security, except that a Person receiving definitive Securities must bear the
cost of insurance, postage, transportation and the like unless such Person takes
delivery of such definitive Securities in person at the offices of Euroclear or
CEDEL. Definitive Securities in bearer form to be delivered in exchange for any
portion of a temporary global Security shall be delivered only outside the
United States.

                  Until exchanged in full as hereinabove provided, the temporary
Securities of any series shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities of the same series and of like
tenor authenticated and delivered hereunder, except that, unless otherwise
specified as contemplated by Section 301, interest payable on a temporary global
Security on an Interest Payment Date for Securities of such series occurring
prior to the applicable Exchange Date shall be payable to Euroclear and CEDEL on
such Interest Payment Date upon delivery by Euroclear and CEDEL to the Trustee
of a certificate or certificates in the form set forth in Exhibit A-2 to this
Indenture (or in such other forms as may be established pursuant to Section
301), for credit without further interest on or after such Interest Payment Date
to the respective accounts of Persons who are the beneficial owners of such
temporary global Security on such Interest Payment Date and who have each
delivered to Euroclear or CEDEL, as the case may be, a certificate dated no
earlier than 15 days prior to the Interest Payment Date occurring prior to such
Exchange Date in the form set forth as Exhibit A-1 to this Indenture (or in such
other forms as may be established pursuant to Section 301). Notwithstanding
anything to the contrary herein contained, the certifications made pursuant to
this paragraph shall satisfy the certification requirements of the preceding two
paragraphs of this Section 304(b) and of the third paragraph of Section 303 of
this Indenture and the interests of the Persons who are the beneficial owners of
the temporary global Security with respect to which such certification was made
will be exchanged for definitive Securities of the same series and of like tenor
on the Exchange Date or the date of certification if such date occurs after the
Exchange Date, without further act or deed by such beneficial owners. Except as
otherwise provided in this paragraph, no payments of principal or interest owing
with respect to a beneficial interest in a temporary global Security will be
made unless and until such interest in such temporary global Security shall have
been exchanged for an interest in a definitive Security. Any interest so
received by Euroclear and CEDEL and not paid as herein provided shall be
returned to the Trustee prior to the expiration of two years after such Interest
Payment Date in order to be repaid to the Company.

                  SECTION 305. Registration, Registration of Transfer and
Exchange. The Company shall cause to be kept at the Corporate Trust Office of
the Trustee or in any office or agency of the Company in a Place of Payment a
register for each series of Securities (the registers maintained in such office
or in any such office or agency of the Company in a Place of Payment being
herein sometimes referred to collectively as the "Security Register") in which,
subject to such reasonable regulations as it may prescribe, the Company shall
provide for the registration of Registered Securities and of transfers of
Registered Securities. The Security Register shall be in written form or any
other form capable of being converted into written form within a reasonable
time. The Trustee, at its Corporate Trust Office, is hereby initially appointed
"Security Registrar" for the purpose of registering Registered Securities and
transfers of Registered Securities on such Security Register as herein provided.
In the event that the Trustee

                                      -26-

<PAGE>   33



shall cease to be Security Registrar, it shall have the right to examine the
Security Register at all reasonable times.

                  Subject to the provisions of this Section 305, upon surrender
for registration of transfer of any Registered Security of any series at any
office or agency of the Company in a Place of Payment for that series, the
Company shall execute, and the Trustee shall authenticate and deliver, in the
name of the designated transferee or transferees, one or more new Registered
Securities of the same series, of any authorized denominations and of a like
aggregate principal amount, bearing a number not contemporaneously outstanding,
and containing identical terms and provisions.

                  Subject to the provisions of this Section 305, at the option
of the Holder, Registered Securities of any series may be exchanged for other
Registered Securities of the same series, of any authorized denomination or
denominations and of a like aggregate principal amount, containing identical
terms and provisions, upon surrender of the Registered Securities to be
exchanged at any such office or agency. Whenever any such Registered Securities
are so surrendered for exchange, the Company shall execute, and the Trustee
shall authenticate and deliver, the Registered Securities which the Holder
making the exchange is entitled to receive. Unless otherwise specified with
respect to any series of Securities as contemplated by Section 301, Bearer
Securities may not be issued in exchange for Registered Securities.

                  If (but only if) permitted by the applicable Board Resolution
and (subject to Section 303) set forth in the applicable Officers' Certificate,
or in any indenture supplemental hereto, delivered as contemplated by Section
301, at the option of the Holder, Bearer Securities of any series may be
exchanged for Registered Securities of the same series of any authorized
denominations and of a like aggregate principal amount and tenor, upon surrender
of the Bearer Securities to be exchanged at any such office or agency, with all
unmatured coupons and all matured coupons in default thereto appertaining. If
the Holder of a Bearer Security is unable to produce any such unmatured coupon
or coupons or matured coupon or coupons in default, any such permitted exchange
may be effected if the Bearer Securities are accompanied by payment in funds
acceptable to the Company in an amount equal to the face amount of such missing
coupon or coupons, or the surrender of such missing coupon or coupons may be
waived by the Company and the Trustee if there is furnished to them such
security or indemnity as they may require to save each of them and any Paying
Agent harmless. If thereafter the Holder of such Security shall surrender to any
Paying Agent any such missing coupon in respect of which such a payment shall
have been made, such Holder shall be entitled to receive the amount of such
payment; provided, however, that, except as otherwise provided in Section 1002,
interest represented by coupons shall be payable only upon presentation and
surrender of those coupons at an office or agency located outside the United
States. Notwithstanding the foregoing, in case a Bearer Security of any series
is surrendered at any such office or agency in a permitted exchange for a
Registered Security of the same series and like tenor after the close of
business at such office or agency on (i) any Regular Record Date and before the
opening of business at such office or agency on the relevant Interest Payment
Date, or (ii) any Special Record Date and before the opening of business at such
office or agency on the related proposed date for payment of Defaulted Interest,
such Bearer Security shall be surrendered without the coupon relating to such
Interest Payment Date or proposed date for payment, as the case may be, and
interest or Defaulted Interest, as the case may be, will not be payable on such
Interest Payment Date or

                                      -27-

<PAGE>   34



proposed date for payment, as the case may be, in respect of the Registered
Security issued in exchange for such Bearer Security, but will be payable only
to the Holder of such coupon when due in accordance with the provisions of this
Indenture. Whenever any Securities are so surrendered for exchange, the Company
shall execute, and the Trustee shall authenticate and deliver, the Securities
which the Holder making the exchange is entitled to receive.

                  Notwithstanding the foregoing, except as otherwise specified
as contemplated by Section 301, any permanent global Security shall be
exchangeable only as provided in this paragraph. If the depositary for any
permanent global Security is "DTC", then, unless the terms of such global
Security expressly permit such global Security to be exchanged in whole or in
part for definitive Securities, a global Security may be transferred, in whole
but not in part, only to a nominee of DTC, or by a nominee of DTC to DTC, or to
a successor to DTC for such global Security selected or approved by the Company
or to a nominee of such successor to DTC. If at any time DTC notifies the
Company that it is unwilling or unable to continue as depositary for the
applicable global Security or Securities or if at any time DTC ceases to be a
clearing agency registered under the Exchange Act if so required by applicable
law or regulation, the Company shall appoint a successor depositary with respect
to such global Security or Securities. If (x) a successor depositary for such
global Security or Securities is not appointed by the Company within 90 days
after the Company receives such notice or becomes aware of such unwillingness,
inability or ineligibility, (y) an Event of Default has occurred and is
continuing and the beneficial owners representing a majority in principal amount
of the applicable series of Securities represented by such global Security or
Securities advise DTC to cease acting as depositary for such global Security or
Securities or (z) the Company, in its sole discretion, determines at any time
that all Outstanding Securities (but not less than all) of any series issued or
issuable in the form of one or more global Securities shall no longer be
represented by such global Security or Securities, then the Company shall
execute, and the Trustee shall authenticate and deliver definitive Securities of
like series, rank, tenor and terms in definitive form in an aggregate principal
amount equal to the principal amount of such global Security or Securities. If
any beneficial owner of an interest in a permanent global Security is otherwise
entitled to exchange such interest for Securities of such series and of like
tenor and principal amount of another authorized form and denomination, as
specified as contemplated by Section 301 and provided that any applicable notice
provided in the permanent global Security shall have been given, then without
unnecessary delay but in any event not later than the earliest date on which
such interest may be so exchanged, the Company shall execute, and the Trustee
shall authenticate and deliver definitive Securities in aggregate principal
amount equal to the principal amount of such beneficial owner's interest in such
permanent global Security. On or after the earliest date on which such interests
may be so exchanged, such permanent global Security shall be surrendered for
exchange by DTC or such other depositary as shall be specified in the Company
Order with respect thereto to the Trustee, as the Company's agent for such
purpose; provided, however, that no such exchanges may occur during a period
beginning at the opening of business 15 days before any selection of Securities
to be redeemed and ending on the relevant Redemption Date if the Security for
which exchange is requested may be among those selected for redemption; and
provided further that no Bearer Security delivered in exchange for a portion of
a permanent global Security shall be mailed or otherwise delivered to any
location in the United States. If a Registered Security is issued in exchange
for any portion of a permanent global Security after the close of business at
the office or agency where such exchange occurs on (i) any Regular Record Date
and before the opening of business at such office or agency on the

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<PAGE>   35



relevant Interest Payment Date, or (ii) any Special Record Date and the opening
of business at such office or agency on the related proposed date for payment of
Defaulted Interest, interest or Defaulted Interest, as the case may be, will not
be payable on such Interest Payment Date or proposed date for payment, as the
case may be, in respect of such Registered Security, but will be payable on such
Interest Payment Date or proposed date for payment, as the case may be, only to
the Person to whom interest in respect of such portion of such permanent global
Security is payable in accordance with the provisions of this Indenture.

                  All Securities issued upon any registration of transfer or
exchange of Securities shall be the valid obligations of the Company, evidencing
the same debt, and entitled to the same benefits under this Indenture, as the
Securities surrendered upon such registration of transfer or exchange.

                  Every Registered Security presented or surrendered for
registration of transfer or for exchange or redemption shall (if so required by
the Company or the Security Registrar) be duly endorsed, or be accompanied by a
written instrument of transfer in form satisfactory to the Company and the
Security Registrar, duly executed by the Holder thereof or his attorney duly
authorized in writing.

                  No service charge shall be made for any registration of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Securities, other
than exchanges pursuant to Section 304, 906, 1107 or 1305 not involving any
transfer.

                  The Company, or the Trustee, as applicable, shall not be
required (i) to issue, register the transfer of or exchange any Security if such
Security may be among those selected for redemption during a period beginning at
the opening of business 15 days before selection of the Securities to be
redeemed under Section 1103 and ending at the close of business on (A) if such
Securities are issuable only as Registered Securities, the day of the mailing of
the relevant notice of redemption and (B) if such Securities are issuable as
Bearer Securities, the day of the first publication of the relevant notice of
redemption or, if such Securities are also issuable as Registered Securities and
there is no publication, the mailing of the relevant notice of redemption, or
(ii) to register the transfer of or exchange any Registered Security so selected
for redemption in whole or in part, except, in the case of any Registered
Security to be redeemed in part, the portion thereof not to be redeemed, or
(iii) to exchange any Bearer Security so selected for redemption except that
such a Bearer Security may be exchanged for a Registered Security of that series
and like tenor, provided that such Registered Security shall be simultaneously
surrendered for redemption, or (iv) to issue, register the transfer of or
exchange any Security which has been surrendered for repayment at the option of
the Holder, except the portion, if any, of such Security not to be so repaid.

                  SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.
If any mutilated Security or a Security with a mutilated coupon appertaining to
it is surrendered to the Trustee or the Company, together with, in proper cases,
such security or indemnity as may be required by the Company or the Trustee to
save each of them or any agent of either of them harmless, the Company shall
execute and the Trustee shall authenticate and deliver in exchange

                                      -29-

<PAGE>   36



therefor a new Security of the same series and principal amount, containing
identical terms and provisions and bearing a number not contemporaneously
outstanding, with coupons corresponding to the coupons, if any, appertaining to
the surrendered Security.

                  If there shall be delivered to the Company and to the Trustee
(i) evidence to their satisfaction of the destruction, loss or theft of any
Security or coupon, and (ii) such security or indemnity as may be required by
them to save each of them and any agent of either of them harmless, then, in the
absence of notice to the Company or the Trustee that such Security or coupon has
been acquired by a bona fide purchaser, the Company shall execute and upon its
request the Trustee shall authenticate and deliver, in lieu of any such
destroyed, lost or stolen Security or in exchange for the Security to which a
destroyed, lost or stolen coupon appertains (with all appurtenant coupons not
destroyed, lost or stolen), a new Security of the same series and principal
amount, containing identical terms and provisions and bearing a number not
contemporaneously outstanding, with coupons corresponding to the coupons, if
any, appertaining to such destroyed, lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains.

                  Notwithstanding the provisions of the previous two paragraphs,
in case any such mutilated, destroyed, lost or stolen Security or coupon has
become or is about to become due and payable, the Company in its discretion may,
instead of issuing a new Security, with coupons corresponding to the coupons, if
any, appertaining to such destroyed, lost or stolen Security or to the Security
to which such destroyed, lost or stolen coupon appertains, pay such Security or
coupon; provided, however, that payment of principal of (and premium or
Make-Whole Amount, if any), any interest on and any Additional Amounts with
respect to, Bearer Securities shall, except as otherwise provided in Section
1002, be payable only at an office or agency located outside the United States
and, unless otherwise specified as contemplated by Section 301, any interest on
Bearer Securities shall be payable only upon presentation and surrender of the
coupons appertaining thereto.

                  Upon the issuance of any new Security under this Section, the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

                  Every new Security of any series with its coupons, if any,
issued pursuant to this Section in lieu of any destroyed, lost or stolen
Security, or in exchange for a Security to which a destroyed, lost or stolen
coupon appertains, shall constitute an original additional contractual
obligation of the Company, whether or not the destroyed, lost or stolen Security
and its coupons, if any, or the destroyed, lost or stolen coupon shall be at any
time enforceable by anyone, and shall be entitled to all the benefits of this
Indenture equally and proportionately with any and all other Securities of that
series and their coupons, if any, duly issued hereunder.

                  The provisions of this Section are exclusive and shall
preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Securities or
coupons.


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<PAGE>   37



                  SECTION 307. Payment of Interest; Interest Rights Preserved.
Except as otherwise specified with respect to a series of Securities in
accordance with the provisions of Section 301, interest on any Registered
Security that is payable, and is punctually paid or duly provided for, on any
Interest Payment Date shall be paid to the Person in whose name that Security
(or one or more Predecessor Securities) is registered at the close of business
on the Regular Record Date for such interest at the office or agency of the
Company maintained for such purpose pursuant to Section 1002; provided, however,
that each installment of interest on any Registered Security may at the
Company's option be paid by (i) mailing a check for such interest, payable to or
upon the written order of the Person entitled thereto pursuant to Section 308,
to the address of such Person as it appears on the Security Register or (ii)
transfer to an account maintained by the payee located inside the United States.
Unless otherwise provided as contemplated by Section 301 with respect to the
Securities of any series, payment of interest may be made, in the case of a
Bearer Security, by transfer to an account maintained by the payee with a bank
located outside the United States.

                  Unless otherwise provided as contemplated by Section 301,
every permanent global Security will provide that interest, if any, payable on
any Interest Payment Date will be paid to DTC, Euroclear and/or CEDEL, as the
case may be, with respect to that portion of such permanent global Security held
for its account by Cede & Co. or the Common Depositary, as the case may be, for
the purpose of permitting such party to credit the interest received by it in
respect of such permanent global Security to the accounts of its participants
for the benefit of the beneficial owners thereof.

                  In case a Bearer Security of any series is surrendered in
exchange for a Registered Security of such series after the close of business
(at an office or agency in a Place of Payment for such series) on any Regular
Record Date and before the opening of business (at such office or agency) on the
next succeeding Interest Payment Date, such Bearer Security shall be surrendered
without the coupon relating to such Interest Payment Date and interest will not
be payable on such Interest Payment Date in respect of the Registered Security
issued in exchange for such Bearer Security, but will be payable only to the
Holder of such coupon when due in accordance with the provisions of this
Indenture.

                  Except as otherwise specified with respect to a series of
Securities in accordance with the provisions of Section 301, any interest on any
Registered Security of any series that is payable, but is not punctually paid or
duly provided for, on any Interest Payment Date (herein called "Defaulted
Interest") shall forthwith cease to be payable to the registered Holder thereof
on the relevant Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company at its election in each case,
as provided in clause (1) or (2) below:

                  (1) The Company may elect to make payment of any Defaulted
Interest to the Persons in whose names the Registered Securities of such series
(or their respective Predecessor Securities) are registered at the close of
business on a Special Record Date for the payment of such Defaulted Interest,
which shall be fixed in the following manner. The Company shall notify the
Trustee in writing of the amount of Defaulted Interest proposed to be paid on
each Registered Security of such series and the date of the proposed payment
(which shall not be less than 20 days after such notice is received by the
Trustee), and at the same time the Company shall

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<PAGE>   38



deposit with the Trustee an amount of money in the currency or currencies,
currency unit or units or composite currency or currencies in which the
Securities of such series are payable (except as otherwise specified pursuant to
Section 301 for the Securities of such series) equal to the aggregate amount
proposed to be paid in respect of such Defaulted Interest or shall make
arrangements satisfactory to the Trustee for such deposit on or prior to the
date of the proposed payment, such money when deposited to be held in trust for
the benefit of the Persons entitled to such Defaulted Interest as in this clause
provided. Thereupon the Trustee shall fix a Special Record Date for the payment
of such Defaulted Interest which shall be not more than 15 days and not less
than 10 days prior to the date of the proposed payment and not less than 10 days
after the receipt by the Trustee of the notice of the proposed payment. The
Trustee shall promptly notify the Company of such Special Record Date and, in
the name and at the expense of the Company, shall cause notice of the proposed
payment of such Defaulted Interest and the Special Record Date therefor to be
mailed, first-class postage prepaid, to each Holder of Registered Securities of
such series at his address as it appears in the Security Register not less than
10 days prior to such Special Record Date. The Trustee may, in its discretion,
in the name and at the expense of the Company, cause a similar notice to be
published at least once in an Authorized Newspaper in each place of payment, but
such publications shall not be a condition precedent to the establishment of
such Special Record Date. Notice of the proposed payment of such Defaulted
Interest and the Special Record Date therefor having been mailed as aforesaid,
such Defaulted Interest shall be paid to the Persons in whose names the
Registered Securities of such series (or their respective Predecessor
Securities) are registered at the close of business on such Special Record Date
and shall no longer be payable pursuant to the following clause (2). In case a
Bearer Security of any series is surrendered at the office or agency in a Place
of Payment for such series in exchange for a Registered Security of such series
after the close of business at such office or agency on any Special Record Date
and before the opening of business at such office or agency on the related
proposed date for payment of Defaulted Interest, such Bearer Security shall be
surrendered without the coupon relating to such proposed date of payment and
Defaulted Interest will not be payable on such proposed date of payment in
respect of the Registered Security issued in exchange for such Bearer Security,
but will be payable only to the Holder of such coupon when due in accordance
with the provisions of this Indenture.

                  (2) The Company may make payment of any Defaulted Interest on
the Registered Securities of any series in any other lawful manner not
inconsistent with the requirements of any securities exchange on which such
Securities may be listed, and upon such notice as may be required by such
exchange, if, after notice given by the Company to the Trustee of the proposed
payment pursuant to this clause, such manner of payment shall be deemed
practicable by the Trustee.

                  Subject to the foregoing provisions of this Section and
Section 305, each Security delivered under this Indenture upon registration of
transfer of or in exchange for or in lieu of any other Security shall carry the
rights to interest accrued and unpaid, and to accrue, which were carried by such
other Security.

                  SECTION 308. Persons Deemed Owners. Prior to due presentment
of a Registered Security for registration of transfer, the Company, the Trustee
and any agent of the Company or the Trustee may treat the Person in whose name
such Registered Security is registered as the owner of such Security for the
purpose of receiving payment of principal of

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<PAGE>   39



(and premium or Make-Whole Amount, if any), and (subject to Sections 305 and
307) interest on, such Registered Security and for all other purposes
whatsoever, whether or not such Registered Security be overdue, and none of the
Company, the Trustee or any agent of the Company or the Trustee shall be
affected by notice to the contrary.

                  Title to any Bearer Security and any coupons appertaining
thereto shall pass by delivery. The Company, the Trustee and any agent of the
Company or the Trustee may treat the Holder of any Bearer Security and the
Holder of any coupon as the absolute owner of such Security or coupon for the
purpose of receiving payment thereof or on account thereof and for all other
purposes whatsoever, whether or not such Security or coupon be overdue, and none
of the Company, the Trustee or any agent of the Company or the Trustee shall be
affected by notice to the contrary.

                  None of the Company, the Trustee, any Paying Agent or the
Security Registrar will have any responsibility or liability for any aspect of
the records relating to or payments made on account of beneficial ownership
interests of a Security in global form or for maintaining, supervising or
reviewing any records relating to such beneficial ownership interests.

                  Notwithstanding the foregoing, with respect to any global
Security, nothing herein shall prevent the Company, the Trustee, or any agent of
the Company, or the Trustee, from giving effect to any written certification,
proxy or other authorization furnished by any depositary, as a Holder, with
respect to such global Security or impair, as between such depositary, its
participants and owners of beneficial interests in such global Security, the
operation of customary practices governing the exercise of the rights of such
depositary (or its nominee) as Holder of such global Security.

                  SECTION 309. Cancellation. All Securities and coupons
surrendered for payment, redemption, repayment at the option of the Holder,
registration of transfer or exchange or for credit against any sinking fund
payment shall, if surrendered to any Person other than the Trustee, be delivered
to the Trustee, and any such Securities and coupons and Securities and coupons
surrendered directly to the Trustee for any such purpose shall be promptly
canceled by it. The Company may at any time deliver to the Trustee for
cancellation any Securities previously authenticated and delivered hereunder
which the Company may have acquired in any manner whatsoever, and may deliver to
the Trustee (or to any other Person for delivery to the Trustee) for
cancellation any Securities previously authenticated hereunder which the Company
has not issued and sold, and all Securities so delivered shall be promptly
canceled by the Trustee. If the Company shall so acquire any of the Securities,
however, such acquisition shall not operate as a redemption or satisfaction of
the indebtedness represented by such Securities unless and until the same are
surrendered to the Trustee for cancellation. No Securities shall be
authenticated in lieu of or in exchange for any Securities canceled as provided
in this Section, except as expressly permitted by this Indenture. Canceled
Securities and coupons held by the Trustee shall be destroyed by the Trustee and
the Trustee shall deliver a certificate of such destruction to the Company,
unless by the Company Order, the Company directs their return to it.


                                      -33-

<PAGE>   40



                  SECTION 310. Computation of Interest. Except as otherwise
specified as contemplated by Section 301 with respect to Securities of any
series, interest on the Securities of each series shall be computed on the basis
of a 360-day year consisting of twelve 30-day months.

                                  ARTICLE FOUR

                           SATISFACTION AND DISCHARGE

                  SECTION 401. Satisfaction and Discharge of Indenture. This
Indenture shall upon Company Request cease to be of further effect with respect
to any series of Securities specified in such Company Request (except as to any
surviving rights of registration of transfer or exchange of Securities of such
series herein expressly provided for and any right to receive Additional
Amounts, as provided in Section 1011), and the Trustee, upon receipt of a
Company Order, and at the expense of the Company, shall execute proper
instruments acknowledging satisfaction and discharge of this Indenture as to
such series when,

                  (1) either

                           (A) all Securities of such series theretofore
authenticated and delivered and all coupons, if any, appertaining thereto (other
than (i) coupons appertaining to Bearer Securities surrendered for exchange for
Registered Securities and maturing after such exchange, whose surrender is not
required or has been waived as provided in Section 305, (ii) Securities and
coupons of such series which have been destroyed, lost or stolen and which have
been replaced or paid as provided in Section 306, (iii) coupons appertaining to
Securities called for redemption and maturing after the relevant Redemption
Date, whose surrender has been waived as provided in Section 1106, and (iv)
Securities and coupons of such series for whose payment money has theretofore
been deposited in trust or segregated and held in trust by the Company and
thereafter repaid to the Company or discharged from such trust, as provided in
Section 1003) have been delivered to the Trustee for cancellation; or

                           (B) all Securities of such series and, in the case of
(i) or (ii) below, any coupons appertaining thereto not theretofore delivered to
the Trustee for cancellation

                                    (i)   have become due and payable, or

                                    (ii)  will become due and payable at their
Stated Maturity within one year, or

                                    (iii) if redeemable at the option of the
Company, are to be called for redemption within one year under arrangements
satisfactory to the Trustee for the giving of notice of redemption by the
Trustee in the name, and at the expense of the Company, and the Company, in the
case of (i), (ii) or (iii) above, has irrevocably deposited or caused to be
deposited with the Trustee as trust funds in trust for the purpose an amount in
the currency or currencies, currency unit or units or composite currency or
currencies in which the Securities of such series are payable, sufficient to pay
and discharge the entire indebtedness on such Securities and such coupons not
theretofore delivered to the Trustee for cancellation, for principal (and
premium or Make-Whole Amount, if any) and interest, and any Additional Amounts
with respect

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<PAGE>   41



thereto, to the date of such deposit (in the case of Securities which have
become due and payable) or to the Stated Maturity or Redemption Date, as the
case may be;

                  (2) the Company has paid or caused to be paid all other sums
payable hereunder by the Company; and

                  (3) the Company has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that all conditions
precedent herein provided for relating to the satisfaction and discharge of this
Indenture as to such series have been complied with. Notwithstanding the
satisfaction and discharge of this Indenture, the obligations of the Company to
the Trustee and any predecessor Trustee under Section 606, the obligations of
the Company to any Authenticating Agent under Section 611 and, if money shall
have been deposited with and held by the Trustee pursuant to subclause (B) of
clause (1) of this Section, the obligations of the Trustee under Section 402 and
the last paragraph of Section 1003 shall survive.

                  SECTION 402. Application of Trust Funds. Subject to the
provisions of the last paragraph of Section 1003, all money deposited with the
Trustee pursuant to Section 401 shall be held in trust and applied by it, in
accordance with the provisions of the Securities, the coupons and this
Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal (and premium or
Make-Whole Amount, if any), and any interest and Additional Amounts for whose
payment such money has deposited with or received by the Trustee, but such money
need not be segregated from other funds except to the extent required by law.

                                  ARTICLE FIVE

                                    REMEDIES

                  SECTION 501. Events of Default. "Event of Default," wherever
used herein with respect to any particular series of Securities, means any one
of the following events (whatever the reason for such Event of Default and
whether or not it shall be voluntary or involuntary or be effected by operation
of law or pursuant to any judgment, decree or order of any court or any order,
rule or regulation of any administrative or governmental body):

                  (1) default in the payment of any interest upon or any
Additional Amounts payable in respect of any Security of that series or of any
coupon appertaining thereto, when such interest, Additional Amounts or coupon
becomes due and payable, and continuance of such default for a period of 30
days; or

                  (2) default in the payment of the principal of (or premium or
Make-Whole Amount, if any, on) any Security of that series when it becomes due
and payable at its Maturity; or

                  (3) default in the making of any sinking fund payment when and
as due by the terms of any Security of that series; or


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<PAGE>   42



                  (4) default in the performance, or breach, of any covenant or
warranty of the Company in this Indenture with respect to any Security of that
series (other than a covenant or warranty a default in whose performance or
whose breach is elsewhere in this Section specifically dealt with), and
continuance of such default or breach for a period of 60 days after there has
been given, by registered or certified mail, to the Company by the Trustee, or
to the Company and the Trustee by the Holders of at least 25% in principal
amount of the Outstanding Securities of that series, a written notice specifying
such default or breach and requiring it to be remedied and stating that such
notice is a "Notice of Default" hereunder; or

                  (5) a default under any bond, debenture, note or other
evidence of indebtedness of the Company, or under any mortgage, indenture or
other instrument of the Company (including a default with respect to Securities
of any series other than that series) under which there may be issued or by
which there may be secured any indebtedness of the Company (or by any
Subsidiary, the repayment of which the Company has guaranteed or for which the
Company is directly responsible or liable as obligor or guarantor on a full
recourse basis) whether such indebtedness now exists or shall hereafter be
created, which default shall constitute a failure to pay an aggregate principal
amount exceeding $10,000,000 of such indebtedness when due and payable after the
expiration of any applicable grace period with respect thereto and shall have
resulted in such indebtedness in an aggregate principal amount exceeding
$10,000,000 becoming or being declared due and payable prior to the date on
which it would otherwise have become due and payable, without such indebtedness
having been discharged, or such acceleration having been rescinded or annulled,
within a period of 10 days after there shall have been given, by registered or
certified mail, to the Company by the Trustee, or to the Company and the Trustee
by the Holders of at least 10% in principal amount of the Outstanding Securities
of that series, a written notice specifying such default and requiring the
Company to cause such indebtedness to be discharged or cause such acceleration
to be rescinded or annulled and stating that such notice is a "Notice of
Default" hereunder; or

                  (6) the Company or any Significant Subsidiary pursuant to or
within the meaning of any Bankruptcy Law:

                           (A) commences a voluntary case,

                           (B) consents to the entry of an order for relief
against it in an involuntary case,

                           (C) consents to the appointment of a Custodian of it
or for all or substantially all of its property, or

                           (D) makes a general assignment for the benefit of its
creditors; or

                  (7) a court of competent jurisdiction enters an order or
decree under any Bankruptcy Law that:

                           (A) is for relief against the Company or any
Significant Subsidiary in an involuntary case,


                                      -36-

<PAGE>   43



                           (B) appoints a Custodian of the Company or any
Significant Subsidiary or for all or substantially all of either of its
property, or

                           (C) orders the liquidation of the Company or any
Significant Subsidiary, and the order or decree remains unstayed and in effect
for 90 days; or

                  (8) any other Event of Default provided with respect to
Securities of that series.

                  As used in this Section 501, the term "Bankruptcy Law" means
Title 11 U.S. Code or any similar Federal or State law for the relief of debtors
and the term "Custodian" means any receiver, trustee, assignee, liquidator or
other similar official under any Bankruptcy Law.

                  SECTION 502. Acceleration of Maturity; Rescission and
Annulment. If an Event of Default with respect to Securities of any series at
the time Outstanding occurs and is continuing (other than an Event of Default
specified in clause (6) or (7) of Section 501 that occurs with respect to the
Company), then and in every such case the Trustee or the Holders of not less
than 25% in principal amount of the Outstanding Securities of that series may
declare the principal of (or, if any Securities are Original Issue Discount
Securities or Indexed Securities, such portion of the principal as may be
specified in the terms thereof), and premium (if any) and accrued interest on,
the Securities of that series to be due and payable immediately, by a notice in
writing to the Company, (and to the Trustee if given by the Holders), and upon
any such declaration such principal, premium (if any), and accrued interest or
specified portion thereof shall become immediately due and payable. In the event
of a declaration of acceleration because an Event of Default set forth in clause
(5) of Section 501 has occurred and is continuing, such declaration of
acceleration shall be automatically rescinded and annulled if the event of
default triggering such Event of Default pursuant to clause (5) along with any
other events of default that have been triggered by the Event of Default
(whether or not a notice or declaration of acceleration shall have been given by
the holders of the relevant indebtedness) shall be remedied or cured by the
Company and/or the relevant Subsidiary or waived by the holders of the relevant
indebtedness within 60 days after the declaration of acceleration with respect
thereto. If an Event of Default specified in clause (6) or (7) of Section 501
occurs with respect to the Company, the principal of (or specified portion
thereof), premium, if any, and accrued interest on the Securities of all series
then outstanding shall ipso facto become and be immediately due and payable
without any declaration or other act on the part of the Trustee or any Holder.

                  At any time after such a declaration of acceleration with
respect to Securities of any series has been made and before a judgment or
decree for payment of the money due has been obtained by the Trustee as
hereinafter in this Article provided, the Holders of a majority in principal
amount of the Outstanding Securities of that series, by written notice to the
Company and the Trustee, may rescind and annul such declaration and its
consequences if:

                  (1) the Company has paid or deposited with the Trustee a sum
sufficient to pay in the currency, currency unit or composite currency in which
the Securities of such series are payable (except as otherwise specified
pursuant to Section 301 for the Securities of such series):

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<PAGE>   44



                           (A) all overdue installments of interest on and any
Additional Amounts payable in respect of all Outstanding Securities of that
series and any related coupons,

                           (B) the principal of (and premium or Make-Whole
Amount, if any, on) any Outstanding Securities of that series which have become
due otherwise than by such declaration of acceleration and interest thereon at
the rate or rates borne by or provided for in such Securities,

                           (C) to the extent that payment of such interest is
lawful, interest upon overdue installments of interest and any Additional
Amounts at the rate or rates borne by or provided for in such Securities, and

                           (D) all sums paid or advanced by the Trustee
hereunder and the reasonable compensation, expenses, disbursements and advances
of the Trustee, its agents and counsel; and

                  (2) all Events of Default with respect to Securities of that
series, other than the nonpayment of the principal of (or premium or Make-Whole
Amount, if any) or interest on Securities of that series which have become due
solely by such declaration of acceleration, have been cured or waived as
provided in Section 513.

                  No such rescission shall affect any subsequent default or
impair any right consequent thereon.

                  SECTION 503. Collection of Indebtedness and Suits for
Enforcement by Trustee. The Company covenants that if:

                  (1) default is made in the payment of any installment of
interest or Additional Amounts, if any, on any Security of any series and any
related coupon when such interest or Additional Amount becomes due and payable
and such default continues for a period of 30 days, or

                  (2) default is made in the payment of the principal of (or
premium or Make-Whole Amount, if any, on) any Security of any series at its
Maturity, then the Company will, upon demand of the Trustee, pay to the Trustee,
for the benefit of the Holders of such Securities of such series and coupons,
the whole amount then due and payable on such Securities and coupons for
principal (and premium or Make-Whole Amount, if any) and interest and Additional
Amount, with interest upon any overdue principal (and premium or Make-Whole
Amount, if any) and, to the extent that payment of such interest shall be
legally enforceable, upon any overdue installments of interest or Additional
Amounts, if any, at the rate or rates borne by or provided for in such
Securities, and, in addition thereto, such further amount as shall be sufficient
to cover the costs and expenses of collection, including the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel.

                  If the Company fails to pay such amounts forthwith upon such
demand, the Trustee, in its own name and as trustee of an express trust, may
institute a judicial proceeding for the collection of the sums so due and
unpaid, and may prosecute such proceeding to judgment or

                                      -38-

<PAGE>   45



final decree, and may enforce the same against the Company, or any other obligor
upon such Securities of such series and collect the moneys adjudged or decreed
to be payable in the manner provided by law out of the property of the Company
or any other obligor upon such Securities of such series, wherever situated.

                  If an Event of Default with respect to Securities of any
series occurs and is continuing, the Trustee may in its discretion proceed to
protect and enforce its rights and the rights of the Holders of Securities of
such series and any related coupons by such appropriate judicial proceedings as
the Trustee shall deem most effectual to protect and enforce any such rights,
whether for the specific enforcement of any covenant or agreement in this
Indenture or in aid of the exercise of any power granted herein, or to enforce
any other proper remedy.

                  SECTION 504. Trustee May File Proofs of Claim. In case of the
pendency of any receivership, insolvency, liquidation, bankruptcy,
reorganization, arrangement, adjustment, composition or other judicial
proceeding relative to the Company or any other obligor upon the Securities or
the property of the Company or of such other obligor or their creditors, the
Trustee (irrespective of whether the principal of the Securities of any series
shall then be due and payable as therein expressed or by declaration or
otherwise and irrespective of whether the Trustee shall have made any demand on
the Company for the payment of overdue principal, premium or Make-Whole Amount,
if any, or interest) shall be entitled and empowered, by intervention in such
proceeding or otherwise:

                                    (i)  to file and prove a claim for the whole
amount, or such lesser amount as may be provided for in the Securities of such
series, of principal (and premium or Make-Whole Amount, if any) and interest and
Additional Amounts, if any, owing and unpaid in respect of the Securities and to
file such other papers or documents as may be necessary or advisable in order to
have the claims of the Trustee (including any claim for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel) and of the Holders allowed in such judicial proceeding, and

                                    (ii) to collect and receive any moneys or
other property payable or deliverable on any such claims and to distribute the
same; and any custodian, receiver, assignee, trustee, liquidator, sequestrator
(or other similar official) in any such judicial proceeding is hereby authorized
by each Holder of Securities of such series and coupons to make such payments to
the Trustee, and in the event that the Trustee shall consent to the making of
such payments directly to the Holders, to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee and any predecessor Trustee, their agents and counsel, and any other
amounts due the Trustee or any predecessor Trustee under Section 606. Nothing
herein contained shall be deemed to authorize the Trustee to authorize or
consent to or accept or adopt on behalf of any Holder of a Security or coupon
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or coupons or the rights of any Holder thereof, or to authorize the
Trustee to vote in respect of the claim of any Holder of a Security or coupon in
any such proceeding.

                  SECTION 505. Trustee May Enforce Claims Without Possession of
Securities or Coupons. All rights of action and claims under this Indenture or
any of the Securities or coupons may be prosecuted and enforced by the Trustee
without the possession of any of the Securities or

                                      -39-


<PAGE>   46



coupons or the production thereof in any proceeding relating thereto, and any
such proceeding instituted by the Trustee shall be brought in its own name as
trustee of an express trust, and any recovery of judgment shall, after provision
for the payment of the reasonable compensation, expenses, disbursements and
advances of the Trustee, its agents and counsel, be for the ratable benefit of
the Holders of the Securities and coupons in respect of which such judgment has
been recovered.

                  SECTION 506. Application of Money Collected. Any money
collected by the Trustee pursuant to this Article shall be applied in the
following order, at the date or dates fixed by the Trustee and, in case of the
distribution of such money on account of principal (or premium or Make-Whole
Amount, if any) or interest and any Additional Amounts, upon presentation of the
Securities or coupons, or both, as the case may be, and the notation thereon of
the payment if only partially paid and upon surrender thereof if fully paid:

                           FIRST: To the payment of all amounts due the Trustee
and any predecessor Trustee under Section 606;

                           SECOND: To the payment of the amounts then due and
unpaid upon the Securities and coupons for principal (and premium or Make-Whole
Amount, if any) and interest and any Additional Amounts payable, in respect of
which or for the benefit of which such money has been collected, ratably,
without preference or priority of any kind, according to the aggregate amounts
due and payable on such Securities and coupons for principal (and premium or
Make-Whole Amount, if any), interest and Additional Amounts, respectively; and

                           THIRD: To the payment of the remainder, if any, to
the Company.

                  SECTION 507. Limitation on Suits. No Holder of any Security of
any series or any related coupon shall have any right to institute any
proceeding, judicial or otherwise, with respect to this Indenture, or for the
appointment of a receiver or trustee, or for any other remedy hereunder, unless:

                  (1) such Holder has previously given written notice to the
Trustee of a continuing Event of Default with respect to the Securities of that
series;

                  (2) the Holders of not less than 25% in principal amount of
the Outstanding Securities of that series shall have made written request to the
Trustee to institute proceedings in respect of such Event of Default in its own
name as Trustee hereunder;

                  (3) such Holder or Holders have offered to the Trustee
indemnity reasonably satisfactory to the Trustee against the costs, expenses and
liabilities to be incurred in compliance with such request;

                  (4) the Trustee for 60 days after its receipt of such notice,
request and offer of indemnity has failed to institute any such proceeding; and

                  (5) no direction inconsistent with such written request has
been given to the Trustee during such 60-day period by the Holders of a majority
in principal amount of the

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<PAGE>   47



Outstanding Securities of that series; it being understood and intended that no
one or more of such Holders shall have any right in any manner whatever by
virtue of, or by availing of, any provision of this Indenture to affect, disturb
or prejudice the rights of any other of such Holders, or to obtain or to seek to
obtain priority or preference over any other of such Holders or to enforce any
right under this Indenture, except in the manner herein provided and for the
equal and ratable benefit of all such Holders.

                  SECTION 508. Unconditional Right of Holders to Receive
Principal, Premium or Make-Whole Amount, if any, Interest and Additional
Amounts. Notwithstanding any other provision in this Indenture, the Holder of
any Security or coupon shall have the right which is absolute and unconditional
to receive payment of the principal of (and premium or Make-Whole Amount, if
any) and (subject to Sections 305 and 307) interest on, and any Additional
Amounts in respect of, such Security or payment of such coupon on the respective
due dates expressed in such Security or coupon (or, in the case of redemption,
on the Redemption Date) and to institute suit for the enforcement of any such
payment, and such rights shall not be impaired without the consent of such
Holder.

                  SECTION 509. Restoration of Rights and Remedies. If the
Trustee or any Holder of a Security or coupon has instituted any proceeding to
enforce any right or remedy under this Indenture and such proceeding has been
discontinued or abandoned for any reason, or has been determined adversely to
the Trustee or to such Holder, then and in every such case, the Company, the
Trustee and the Holders of Securities and coupons shall, subject to any
determination in such proceeding, be restored severally and respectively to
their former positions hereunder and thereafter all rights and remedies of the
Trustee and the Holders shall continue as though no such proceeding had been
instituted.

                  SECTION 510. Rights and Remedies Cumulative. Except as
otherwise provided with respect to the replacement or payment of mutilated,
destroyed, lost or stolen Securities or coupons in the last paragraph of Section
306, no right or remedy herein conferred upon or reserved to the Trustee or to
the Holders of Securities or coupons is intended to be exclusive of any other
right or remedy, and every right and remedy shall, to the extent permitted by
law, be cumulative and in addition to every other right and remedy given
hereunder or now or hereafter existing at law or in equity or otherwise. The
assertion or employment of any right or remedy hereunder, or otherwise, shall
not prevent the concurrent assertion or employment of any other appropriate
right or remedy.

                  SECTION 511. Delay or Omission Not Waiver. No delay or
omission of the Trustee or of any Holder of any Security or coupon to exercise
any right or remedy accruing upon any Event of Default shall impair any such
right or remedy or constitute a waiver of any such Event of Default or an
acquiescence therein. Every right and remedy given by this Article or by law to
the Trustee or to the Holders may be exercised from time to time, and as often
as may be deemed expedient, by the Trustee or by the Holders of Securities or
coupons, as the case may be.

                  SECTION 512. Control by Holders of Securities. The Holders of
not less than a majority in principal amount of the Outstanding Securities of
any series shall have the right to direct the time, method and place of
conducting any proceeding for any remedy available to the

                                      -41-

<PAGE>   48



Trustee or exercising any trust or power conferred on the Trustee with respect
to the Securities of such series, provided that

                  (1) such direction shall not be in conflict with any rule of
law or with this Indenture,

                  (2) the Trustee may take any other action deemed proper by the
Trustee which is not inconsistent with such direction, and

                  (3) the Trustee need not take any action which might involve
it in personal liability or be unduly prejudicial to the Holders of Securities
of such series not joining therein.

                  SECTION 513. Waiver of Past Defaults. The Holders of not less
than a majority in principal amount of the Outstanding Securities of any series
may on behalf of the Holders of all the Securities of such series and any
related coupons waive any past default hereunder with respect to such series and
its consequences, except a default

                  (1) in the payment of the principal of (or premium or
Make-Whole Amount, if any) or interest on or Additional Amounts payable in
respect of any Security of such series or any related coupons, or

                  (2) in respect of a covenant or provision hereof which under
Article Nine cannot be modified or amended without the consent of the Holder of
each Outstanding Security of such series affected.

                  Upon any such waiver, such default shall cease to exist, and
any Event of Default arising therefrom shall be deemed to have been cured, for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other default or Event of Default or impair any right consequent
thereon.

                  SECTION 514. Waiver of Usury, Stay or Extension Laws. The
Company covenants (to the extent that it may lawfully do so) that it will not at
any time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any usury, stay or extension law wherever enacted, now
or at any time hereafter in force, which may affect the covenants or the
performance of this Indenture; and the Company (to the extent that it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it will not hinder, delay or impede the execution of any
power herein granted to the Trustee, but will suffer and permit the execution of
every such power as though no such law had been enacted.

                  SECTION 515. Undertaking for Costs. All parties to this
Indenture agree, and each Holder of any Security by his acceptance thereof shall
be deemed to have agreed, that any court may in its discretion require, in any
suit for the enforcement of any right or remedy under this Indenture, or in any
suit against the Trustee for any action taken or omitted by it as Trustee, the
filing by any party litigant in such suit of any undertaking to pay the costs of
such suit, and that such court may in its discretion assess reasonable costs,
including reasonable attorneys' fees, against any party litigant in such suit
having due regard to the merits and good faith of the claims

                                      -42-

<PAGE>   49



or defenses made by such party litigant; but the provisions of this Section
shall not apply to any suit instituted by the Trustee, to any suit instituted by
any Holder, or group of Holders, holding in the aggregate more than 10% in
principal amount of the Outstanding Securities, or to any suit instituted by any
Holder for the enforcement of the payment of the principal of (or premium or
Make-Whole Amount, if any) or interest on any Security on or after the
respective Stated Maturities expressed in such Security (or, in the case of
redemption, on or after the Redemption Date).

                                   ARTICLE SIX

                                   THE TRUSTEE

                  SECTION 601. Notice of Defaults. Within 90 days after the
occurrence of any default hereunder with respect to the Securities of any
series, the Trustee shall transmit in the manner and to the extent provided in
TIA Section 313(c), notice of such default hereunder known to the Trustee,
unless such default shall have been cured or waived; provided, however, that,
except in the case of a default in the payment of the principal of (or premium
or Make-Whole Amount, if any) or interest on or any Additional Amounts with
respect to any Security of such series, or in the payment of any sinking fund
installment with respect to the Securities of such series, the Trustee shall be
protected in withholding such notice if and so long as Responsible Officers of
the Trustee in good faith determine that the withholding of such notice is in
the interests of the Holders of the Securities and coupons of such series; and
provided further that in the case of any default or breach of the character
specified in Section 501(4) with respect to the Securities and coupons of such
series, no such notice to Holders shall be given until at least 60 days after
the occurrence thereof. For the purpose of this Section, the term "default"
means any event which is, or after notice or lapse of time or both would become,
an Event of Default with respect to the Securities of such series.

                  SECTION 602. Certain Rights of Trustee. Subject to the
provisions of TIA Section 315(a) through 315(d):

                  (1) the Trustee may rely and shall be protected in acting or
refraining from acting upon any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture,
note, coupon or other paper or document believed by it to be genuine and to have
been signed or presented by the proper party or parties;

                  (2) any request or direction of the Company mentioned herein
shall be sufficiently evidenced by a Company Request or Company Order (other
than delivery of any Security, together with any coupons appertaining thereto,
to the Trustee for authentication and delivery pursuant to Section 303 which
shall be sufficiently evidenced as provided therein) and any resolution of the
Board of Trustees may be sufficiently evidenced by a Board Resolution;

                  (3) whenever in the administration of this Indenture the
Trustee shall deem it desirable that a matter be proved or established prior to
taking, suffering or omitting any action hereunder, the Trustee (unless other
evidence be herein specifically prescribed) may, in the absence of bad faith on
its part, rely upon an Officers' Certificate;


                                      -43-

<PAGE>   50



                  (4) the Trustee may consult with counsel and the advice of
such counsel or any Opinion of Counsel shall be full and complete authorization
and protection in respect of any action taken, suffered or omitted by it
hereunder in good faith and in reliance thereon;

                  (5) the Trustee shall be under no obligation to exercise any
of the rights or powers vested in it by this Indenture at the request or
direction of any of the Holders of Securities of any series or any related
coupons pursuant to this Indenture, unless such Holders shall have offered to
the Trustee security or indemnity reasonably satisfactory to the Trustee against
the costs, expenses and liabilities which might be incurred by it in compliance
with such request or direction;

                  (6) the Trustee shall not be bound to make any investigation
into the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, direction, consent, order, bond,
debenture, note, coupon or other paper or document, but the Trustee, in its
discretion, may make such further inquiry or investigation into such facts or
matters as it may see fit, and, if the Trustee shall determine to make such
further inquiry or investigation, it shall be entitled to examine the books,
records and premises of the Company personally or by agent or attorney;

                  (7) the Trustee may execute any of the trusts or powers
hereunder or perform any duties hereunder either directly or by or through
agents or attorneys and the Trustee shall not be responsible for any misconduct
or negligence on the part of any agent or attorney appointed with due care by it
hereunder; and

                  (8) the Trustee shall not be liable for any action taken,
suffered or omitted by it in good faith and reasonably believed by it to be
authorized or within the discretion or rights or powers conferred upon it by
this Indenture.

                  The Trustee shall not be required to expend or risk its own
funds or otherwise incur any financial liability in the performance of any of
its duties hereunder, or in the exercise of any of its rights or powers, if it
shall have reasonable grounds for believing that repayment of such funds or
adequate indemnity against such risk or liability is not reasonably assured to
it.

                  Except during the continuance of an Event of Default, the
Trustee undertakes to perform only such duties as are specifically set forth in
this Indenture, and no implied covenants or obligations shall be read into this
Indenture against the Trustee. In case an Event of Default with respect to the
Securities has occurred (which has not been cured or waived) the Trustee shall
exercise with respect to the Securities such of the rights and powers vested in
it by this Indenture, and use the same degree of care and skill in their
exercise, as a prudent man would exercise or use under the circumstances in the
conduct of his own affairs.

                  SECTION 603. Not Responsible for Recitals or Issuance of
Securities. The recitals contained herein and in the Securities, except the
Trustee's certificate of authentication, and in any coupons shall be taken as
the statements of the Company and neither the Trustee nor any Authenticating
Agent assumes any responsibility for their correctness. The Trustee makes no
representations as to the validity or sufficiency of this Indenture or of the
Securities, coupons, or any prospectus pursuant to which the Securities are
offered except that the Trustee represents

                                      -44-

<PAGE>   51



that it is duly authorized to execute and deliver this Indenture, authenticate
the Securities and perform its obligations hereunder. Neither the Trustee nor
any Authenticating Agent shall be accountable for the use or application by the
Company of Securities or the proceeds thereof.

                  SECTION 604. May Hold Securities. The Trustee, any Paying
Agent, Security Registrar, Authenticating Agent or any other agent of the
Company, in its individual or any other capacity, may become the owner or
pledgee of Securities and coupons and, subject to TIA Sections 310(b) and 311,
may otherwise deal with the Company with the same rights it would have if it
were not the Trustee, Paying Agent, Security Registrar, Authenticating Agent or
such other agent.

                  SECTION 605. Money Held in Trust. Money held by the Trustee in
trust hereunder need not be segregated from other funds except to the extent
required by law. The Trustee shall be under no liability for interest on any
money received by it hereunder except as otherwise agreed with the Company.

                  SECTION 606. Compensation and Reimbursement. The Company
agrees:

                  (1) to pay to the Trustee from time to time reasonable
compensation for all services rendered by it hereunder as mutually agreed upon
(which compensation shall not be limited by any provision of law in regard to
the compensation of a trustee of an express trust);

                  (2) except as otherwise expressly provided herein, to
reimburse each of the Trustee and any predecessor Trustee upon its request for
all reasonable expenses, disbursements and advances incurred or made by the
Trustee in accordance with any provision of this Indenture (including the
reasonable compensation and the expenses and disbursements of its agents and
counsel), except any such expense, disbursement or advance as may be
attributable to its negligence or bad faith; and

                  (3) to indemnify each of the Trustee, its directors, officers
and employees, and any predecessor Trustee for, and to hold it harmless against,
any loss, liability or expense incurred without negligence or bad faith on its
own part, arising out of or in connection with the acceptance or administration
of the trust or trusts hereunder, including the costs and expenses of defending
itself against any claim or liability in connection with the exercise or
performance of any of its powers or duties hereunder.

                  When the Trustee incurs expenses or renders services in
connection with an Event of Default specified in Section 501(6) or Section
501(7), the expenses (including the reasonable charges and expenses of its
counsel) and the compensation for the services are intended to constitute
expenses of administration under any applicable Federal or state bankruptcy,
insolvency or other similar law.

                  As security for the performance of the obligations of the
Company under this Section, the Trustee shall have a lien prior to the
Securities upon all property and funds held or collected by the Trustee as such,
except funds held in trust for the payment of principal of (or premium or
Make-Whole Amount, if any) or interest on particular Securities or any coupons.


                                      -45-

<PAGE>   52



                  The provisions of this Section shall survive the termination
of this Indenture

                  SECTION 607. Corporate Trustee Required; Eligibility;
Conflicting Interests. There shall at all times be a Trustee hereunder which
shall be eligible to act as Trustee under TIA Section 310(a)(1) and shall have a
combined capital and surplus of at least $50,000,000. If such corporation
publishes reports of condition at least annually, pursuant to law or the
requirements of Federal, State, Territorial or District of Columbia supervising
or examining authority, then for the purposes of this Section, the combined
capital and surplus of such corporation shall be deemed to be its combined
capital and surplus as set forth in its most recent report of condition so
published. If at any time the Trustee shall cease to be eligible in accordance
with the provisions of this Section, it shall resign immediately in the manner
and with the effect hereinafter specified in this Article.

                  SECTION 608.  Resignation and Removal; Appointment of 
Successor.

                           (a) No resignation or removal of the Trustee and no
appointment of a successor Trustee pursuant to this Article shall become
effective until the acceptance of appointment by the successor Trustee in
accordance with the applicable requirements of Section 609.

                           (b) The Trustee may resign at any time with respect
to the Securities of one or more series by giving written notice thereof to the
Company. If an instrument of acceptance by a successor Trustee shall not have
been delivered to the Trustee within 30 days after the giving of such notice of
resignation, the resigning Trustee may petition any court of competent
jurisdiction for the appointment of a successor Trustee.

                           (c) The Trustee may be removed at any time with
respect to the Securities of any series by Act of the Holders of a majority in
principal amount of the Outstanding Securities of such series delivered to the
Trustee and the Company.

                           (d) If at any time:

                                    (1) the Trustee shall fail to comply with
the provisions of TIA Section 310(b) after written request therefor by the
Company or by any Holder of a Security who has been a bona fide Holder of a
Security for at least six months, or

                                    (2) the Trustee shall cease to be eligible
under Section 607 and shall fail to resign after written request therefor by the
Company or by any Holder of a Security who has been a bona fide Holder of a
Security for at least six months, or

                                    (3) the Trustee shall become incapable of
acting or shall be adjudged a bankrupt or insolvent or a receiver of the Trustee
or of its property shall be appointed or any public officer shall take charge or
control of the Trustee or of its property or affairs for the purpose of
rehabilitation, conservation or liquidation, then, in any such case, (i) the
Company by or pursuant to a Board Resolution may remove the Trustee and appoint
a successor Trustee with respect to all Securities, or (ii) subject to TIA
Section 315(e), any Holder of a Security who has been a bona fide Holder of a
Security for at least six months may, on behalf of himself and all

                                      -46-

<PAGE>   53



others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee with respect to all Securities and the appointment of a
successor Trustee or Trustees.

                           (e) If the Trustee shall resign, be removed or become
incapable of acting, or if a vacancy shall occur in the office of Trustee for
any cause with respect to the Securities of one or more series, the Company, by
or pursuant to a Board Resolution, shall promptly appoint a successor Trustee or
Trustees with respect to the Securities of that or those series (it being
understood that any such successor Trustee may be appointed with respect to the
Securities of one or more or all of such series and that at any time there shall
be only one Trustee with respect to the Securities of any particular series).
If, within one year after such resignation, removal or incapability, or the
occurrence of such vacancy, a successor Trustee with respect to the Securities
of any series shall be appointed by Act of the Holders of a majority in
principal amount of the Outstanding Securities of such series delivered to the
Company and the retiring Trustee, the successor Trustee so appointed shall,
forthwith upon its acceptance or such appointment, become the successor Trustee
with respect to the Securities of such series and to that extent supersede the
successor Trustee appointed by the Company. If no successor Trustee with respect
to the Securities of any series shall have been so appointed by the Company or
the Holders of Securities and accepted appointment in the manner hereinafter
provided, the resigning or removed Trustee or any Holder of a Security who has
been a bona fide Holder of a Security of such series for at least six months
may, on behalf of himself and all others similarly situated, petition any court
of competent jurisdiction for the appointment of a successor Trustee with
respect to Securities of such series.

                           (f) The Company shall give notice of each resignation
and each removal of the Trustee with respect to the Securities of any series and
each appointment of a successor Trustee with respect to the Securities of any
series in the manner provided for notices to the Holders of Securities in
Section 106. Each notice shall include the name of the successor Trustee with
respect to the Securities of such series and the address of its Corporate Trust
Office.

                  SECTION 609.  Acceptance of Appointment by Successor.

                           (a) In case of the appointment hereunder of a
successor Trustee with respect to all Securities, every such successor Trustee
shall execute, acknowledge and deliver to the Company and the retiring Trustee
an instrument accepting such appointment, and thereupon the resignation or
removal of the retiring Trustee shall become effective and such successor
Trustee, without any further act, deed or conveyance, shall become vested with
all the rights, powers, trusts and duties of the retiring Trustee; but, on
request of the Company or the successor Trustee, such retiring Trustee shall,
upon payment of its charges, execute and deliver an instrument transferring to
such successor Trustee all the rights, powers and trusts of the retiring
Trustee, and shall duly assign, transfer and deliver to such successor Trustee
all property and money held by such retiring Trustee hereunder, subject
nevertheless to its claim, if any, provided for in Section 606.

                           (b) In case of the appointment hereunder of a
successor Trustee with respect to the Securities of one or more (but not all)
series, the Company, the retiring Trustee and each successor Trustee with
respect to the Securities of one or more series shall execute and deliver an
indenture supplemental hereto, pursuant to Article Nine hereof, wherein each

                                      -47-

<PAGE>   54



successor Trustee shall accept such appointment and which (1) shall contain such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each successor Trustee all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Securities of that or those series to which
the appointment of such successor Trustee relates, (2) if the retiring Trustee
is not retiring with respect to all Securities, shall contain such provisions as
shall be deemed necessary or desirable to confirm that all the rights, powers,
trusts and duties of the retiring Trustee with respect to the Securities of that
or those series as to which the retiring Trustee is not retiring shall continue
to be vested in the retiring Trustee, and (3) shall add to or change any of the
provisions of this Indenture as shall be necessary to provide for or facilitate
the administration of the trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental indenture shall
constitute such Trustees co- trustees of the same trust and that each such
Trustee shall be trustee of a trust or trusts hereunder separate and apart from
any trust or trusts hereunder administered by any other such Trustee; and upon
the execution and delivery of such supplemental indenture the resignation or
removal of the retiring Trustee shall become effective to the extent provided
therein and each such successor Trustee, without any further act, deed or
conveyance, shall become vested with all the rights, powers, trusts and duties
of the retiring Trustee with respect to the Securities of that or those series
to which the appointment of such successor Trustee relates; but, on request of
the Company, or any successor Trustee, such retiring Trustee shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee hereunder with respect to the Securities of that or those
series to which the appointment of such successor Trustee relates.

                           (c) Upon request of any such successor Trustee, the
Company shall execute any and all instruments for more fully and certainly
vesting in and confirming to such successor Trustee all such rights, powers and
trusts referred to in paragraph (a) or (b) of this Section, as the case may be.

                           (d) No successor Trustee shall accept its appointment
unless at the time of such acceptance such successor Trustee shall be qualified
and eligible under this Article.

                  SECTION 610. Merger, Conversion, Consolidation or Succession
to Business. Any corporation into which the Trustee may be merged or converted
or with which it may be consolidated, or any corporation resulting from any
merger, conversion or consolidation to which the Trustee shall be a party, or
any corporation succeeding to all or substantially all of the corporate trust
business of the Trustee, shall be the successor of the Trustee hereunder,
provided such corporation shall be otherwise qualified and eligible under this
Article, without the execution or filing of any paper or any further act on the
part of any of the parties hereto. In case any Securities or coupons shall have
been authenticated, but not delivered, by the Trustee then in office, any
successor by merger, conversion or consolidation to such authenticating Trustee
may adopt such authentication and deliver the Securities or coupons so
authenticated with the same effect as if such successor Trustee had itself
authenticated such Securities or coupons. In case any Securities or coupons
shall not have been authenticated by such predecessor Trustee, any such
successor Trustee may authenticate and deliver such Securities or coupons, in
either its own name or that of its predecessor Trustee, with the full force and
effect which this Indenture provides for the certificate of authentication of
the Trustee.


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<PAGE>   55



                  SECTION 611. Appointment of Authenticating Agent. At any time
when any of the Securities remain Outstanding, the Trustee may appoint an
Authenticating Agent or Agents with respect to one or more series of Securities
which shall be authorized to act on behalf of the Trustee to authenticate
Securities of such series issued upon exchange, registration of transfer or
partial redemption or repayment thereof, and Securities so authenticated shall
be entitled to the benefits of this Indenture and shall be valid and obligatory
for all purposes as if authenticated by the Trustee hereunder. Any such
appointment shall be evidenced by an instrument in writing signed by a
Responsible Officer of the Trustee, a copy of which instrument shall be promptly
furnished to the Company.

                  Wherever reference is made in this Indenture to the
authentication and delivery of Securities by the Trustee or the Trustee's
certificate of authentication, such reference shall be deemed to include
authentication and delivery on behalf of the Trustee by an Authenticating Agent
and a certificate of authentication executed on behalf of the Trustee by an
Authenticating Agent. Each Authenticating Agent shall be acceptable to the
Company and shall at all times be a bank or trust company or corporation
organized and doing business and in good standing under the laws of the United
States of America or of any State or the District of Columbia, authorized under
such laws to act as Authenticating Agent, having a combined capital and surplus
of not less than $50,000,000 and subject to supervision or examination by
Federal or State authorities. If such Authenticating Agent publishes reports of
condition at least annually, pursuant to law or the requirements of the
aforesaid supervising or examining authority, then for the purposes of this
Section, the combined capital and surplus of such Authenticating Agent shall be
deemed to be its combined capital and surplus as set forth in its most recent
report of condition so published. In case at any time an Authenticating Agent
shall cease to be eligible in accordance with the provisions of this Section,
such Authenticating Agent shall resign immediately in the manner and with the
effect specified in this Section.

                  Any corporation into which an Authenticating Agent may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which such
Authenticating Agent shall be a party, or any corporation succeeding to the
corporate agency or corporate trust business of an Authenticating Agent, shall
continue to be an Authenticating Agent, provided such corporation shall be
otherwise eligible under this Section, without the execution or filing of any
paper or further act on the part of the Trustee or the Authenticating Agent.

                  An Authenticating Agent for any series of Securities may at
any time resign by giving written notice of resignation to the Trustee for such
series and to the Company. The Trustee for any series of Securities may at any
time terminate the agency of an Authenticating Agent by giving written notice of
termination to such Authenticating Agent and the Company. Upon receiving such a
notice of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section, the Trustee for such series may appoint a successor
Authenticating Agent which shall be acceptable to the Company and shall give
notice of such appointment to all Holders of Securities of the series with
respect to which such Authenticating Agent will serve in the manner set forth in
Section 106. Any successor Authenticating Agent upon acceptance of its
appointment hereunder shall become vested with all the rights, powers and duties
of its predecessor hereunder, with like effect as if originally named as an
Authenticating Agent herein. No

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<PAGE>   56



successor Authenticating Agent shall be appointed unless eligible under the
provisions of this Section.

                  The Company agrees to pay to each Authenticating Agent from
time to time reasonable compensation including reimbursement of its reasonable
expenses for its services under this Section.

                  If an appointment with respect to one or more series is made
pursuant to this Section, the Securities of such series may have endorsed
thereon, in addition to or in lieu of the Trustee's certificate of
authentication, an alternate certificate of authentication substantially in the
following form:

                  This is one of the Securities of the series designated therein
referred to in the within-mentioned Indenture.

                                    THE FIRST NATIONAL BANK OF CHICAGO,
                                    as Trustee

                                    By:
                                         ---------------------------------
                                         as Authenticating Agent


                                     By: 
                                         ---------------------------------
                                         as Authorized Signatory


                                  ARTICLE SEVEN

                HOLDERS' LISTS AND REPORTS BY TRUSTEE AND COMPANY

                  SECTION 701. Disclosure of Names and Addresses of Holders.
Every Holder of Securities or coupons, by receiving and holding the same, agrees
with the Company and the Trustee that neither the Company nor the Trustee nor
any Authenticating Agent nor any Paying Agent nor any Security Registrar shall
be held accountable by reason of the disclosure of any information as to the
names and addresses of the Holders of Securities in accordance with TIA Section
312, regardless of the source from which such information was derived, and that
the Trustee shall not be held accountable by reason of mailing any material
pursuant to a request made under TIA Section 312(b).

                  SECTION 702. Reports by Trustee. Within 60 days after May 15
of each year commencing with the first May 15 after the first issuance of
Securities pursuant to this Indenture, the Trustee shall transmit by mail to all
Holders of Securities as provided in TIA Section 313(c) a brief report dated as
of such May 15 if required by TIA Section 313(a).

                  SECTION 703. Reports by Company. The Company will:


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<PAGE>   57



                  (1) file with the Trustee, within 15 days after the Company is
required to file the same with the Commission, copies of the annual reports and
of the information, documents and other reports (or copies of such portions of
any of the foregoing as the Commission may from time to time by rules and
regulations prescribe) which the Company may be required to file with the
Commission pursuant to Section 13 or Section 15(d) of the Exchange Act; or if
the Company is not required to file information, documents or reports pursuant
to either of such Sections, then it will file with the Trustee and the
Commission, in accordance with rules and regulations prescribed from time to
time by the Commission, such of the supplementary and periodic information,
documents and reports which may be required pursuant to Section 13 of the
Exchange Act in respect of a security listed and registered on a national
securities exchange as may be prescribed from time to time in such rules and
regulations;

                  (2) file with the Trustee and the Commission, in accordance
with rules and regulations prescribed from time to time by the Commission, such
additional information, documents and reports with respect to compliance by the
Company with the conditions and covenants of this Indenture as may be required
from time to time by such rules and regulations; and

                  (3) transmit by mail to the Holders of Securities, within 30
days after the filing thereof with the Trustee, in the manner and to the extent
provided in TIA Section 313(c), such summaries of any information, documents and
reports required to be filed by the Company pursuant to paragraphs (1) and (2)
of this Section as may be required by rules and regulations prescribed from time
to time by the Commission.

                  SECTION 704. The Company to Furnish Trustee Names and 
Addresses of Holders.  The Company will furnish or cause to be furnished to 
the Trustee:

                  (a) semi-annually, not later than 15 days after the Regular
Record Date for interest for each series of Securities, a list, in such form as
the Trustee may reasonably require, of the names and addresses of the Holders of
Registered Securities of such series as of such Regular Record Date, or if there
is no Regular Record Date for interest for such series of Securities,
semi-annually, upon such dates as are set forth in the Board Resolution or
indenture supplemental hereto authorizing such series, and

                  (b) at such other times as the Trustee may request in writing,
within 30 days after the receipt by the Company of any such request, a list of
similar form and content as of a date not more than 15 days prior to the time
such list is furnished, provided, however, that, so long as the Trustee is the
Security Registrar, no such list shall be required to be furnished.

                                  ARTICLE EIGHT

                CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

                  SECTION 801. Consolidations and Mergers of Company and Sales,
Leases and Conveyances Permitted Subject to Certain Conditions. The Company may
consolidate with, or sell, lease or convey all or substantially all of its
assets to, or merge with or into any other entity, provided that in any such
case, (1) either the Company shall be the continuing entity, or the

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<PAGE>   58



successor entity shall be an entity organized and existing under the laws of the
United States or a State thereof and such successor entity shall expressly
assume the due and punctual payment of the principal of (and premium or
Make-Whole Amount, if any) and any interest (including all Additional Amounts,
if any, payable pursuant to Section 1011) on all of the Securities, according to
their tenor, and the due and punctual performance and observance of all of the
covenants and conditions of this Indenture to be performed by the Company by
supplemental indenture, complying with Article Nine hereof, satisfactory to the
Trustee, executed and delivered to the Trustee by such entity and (2)
immediately after giving effect to such transaction and treating any
indebtedness which becomes an obligation of the Company or any Subsidiary as a
result thereof as having been incurred by the Company or such Subsidiary at the
time of such transaction, no Event of Default, and no event which, after notice
or the lapse of time, or both, would become an Event of Default, shall have
occurred and be continuing.

                  SECTION 802. Rights and Duties of Successor Entity. In case of
any such consolidation, merger, sale, lease or conveyance and upon any such
assumption by the successor entity, such successor entity shall succeed to and
be substituted for the Company, with the same effect as if it had been named
herein as the party of the first part, and the predecessor entity, except in the
event of a lease, shall be relieved of any further obligation under this
Indenture and the Securities. Such successor entity thereupon may cause to be
signed, and may issue either in its own name or in the name of the Company, any
or all of the Securities issuable hereunder which theretofore shall not have
been signed by the Company and delivered to the Trustee; and, upon the order of
such successor entity, instead of the Company, and subject to all the terms,
conditions and limitations in this Indenture prescribed, the Trustee shall
authenticate and shall deliver any Securities which previously shall have been
signed and delivered by the officers of the Company to the Trustee for
authentication, and any Securities which such successor entity thereafter shall
cause to be signed and delivered to the Trustee for that purpose. All the
Securities so issued shall in all respects have the same legal rank and benefit
under this Indenture as the Securities of the same series theretofore or
thereafter issued in accordance with the terms of this Indenture as though all
of such Securities had been issued at the date of the execution hereof.

                  In case of any such consolidation, merger, sale, lease or
conveyance, such changes in phraseology and form (but not in substance) may be
made in the Securities thereafter to be issued as may be appropriate.

                  In case of any such consolidation, merger, sale, lease or
conveyance, such changes in phraseology and form (but not in substance) may be
made in the Securities thereafter to be issued as may be appropriate.

                  SECTION 803. Officers' Certificate and Opinion of Counsel. Any
consolidation, merger, sale, lease or conveyance permitted under Section 801 is
also subject to the condition that the Trustee receive an Officers' Certificate
and an Opinion of Counsel to the effect that any such consolidation, merger,
sale, lease or conveyance, and the assumption by any successor entity, complies
with the provisions of this Article and that all conditions precedent herein
provided for relating to such transaction have been complied with.


                                      -52-

<PAGE>   59



                                  ARTICLE NINE

                             SUPPLEMENTAL INDENTURES

                  SECTION 901. Supplemental Indentures Without Consent of
Holders. Without the consent of any Holders of Securities or coupons, the
Company, when authorized by or pursuant to a Board Resolution, and the Trustee,
at any time and from time to time, may enter into one or more indentures
supplemental hereto, in form satisfactory to the Trustee, for any of the
following purposes:

                  (1) to evidence the succession of another Person to the
Company and the assumption by any such successor of the covenants of the Company
herein and in the Securities contained; or

                  (2) to add to the covenants of the Company for the benefit of
the Holders of all or any series of Securities (and if such covenants are to be
for the benefit of less than all series of Securities, stating that such
covenants are expressly being included solely for the benefit of such series) or
to surrender any right or power herein conferred upon the Company; or

                  (3) to add any additional Events of Default for the benefit of
the Holders of all or any series of Securities (and if such Events of Default
are to be for the benefit of less than all series of Securities, stating that
such Events of Default are expressly being included solely for the benefit of
such series); provided, however, that in respect of any such additional Events
of Default such supplemental indenture may provide for a particular period of
grace after default (which period may be shorter or longer than that allowed in
the case of other defaults) or may provide for an immediate enforcement upon
such default or may limit the remedies available to the Trustee upon such
default or may limit the right of the Holders of a majority in aggregate
principal amount of that or those series of Securities to which such additional
Events of Default apply to waive such default; or

                  (4) to add to or change any of the provisions of this
Indenture to provide that Bearer Securities may be registrable as to principal,
to change or eliminate any restrictions on the payment of principal of or any
premium or interest on Bearer Securities, to permit Bearer Securities to be
issued in exchange for Registered Securities, to permit Bearer Securities to be
issued in exchange for Bearer Securities of other authorized denominations or to
permit or facilitate the issuance of Securities in uncertificated form, provided
that any such action shall not adversely affect the interests of the Holders of
Securities of any series or any related coupons in any material respect; or

                  (5) to change or eliminate any of the provisions of this
Indenture, provided that any such change or elimination shall become effective
only when there is no Security Outstanding of any series created prior to the
execution of such supplemental indenture which is entitled to the benefit of
such provision; or

                  (6) to secure the Securities; or


                                      -53-

<PAGE>   60



                  (7)  to establish the form or terms of Securities of any
series and any related coupons as permitted by Sections 201 and 301; or

                   (8) to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee with respect to the Securities of one or more
series and to add to or change any of the provisions of this Indenture as shall
be necessary to provide for or facilitate the administration of the trusts
hereunder by more than one Trustee; or

                   (9) to cure any ambiguity, to correct or supplement any
provision herein which may be defective or inconsistent with any other provision
herein, or to make any other provisions with respect to matters or questions
arising under this Indenture which shall not be inconsistent with the provisions
of this Indenture, provided such provisions shall not adversely affect the
interests of the Holders of Securities of any series or any related coupons in
any material respect; or

                  (10) to supplement any of the provisions of this Indenture to
such extent as shall be necessary to permit or facilitate the defeasance and
discharge of any series of Securities pursuant to Sections 401, 1402 and 1403;
provided that any such action shall not adversely affect the interests of the
Holders of Securities of such series and any related coupons or any other series
of Securities in any material respect.

                  SECTION 902. Supplemental Indentures with Consent of Holders.
With the consent of the Holders of not less than a majority in principal amount
of all Outstanding Securities affected by such supplemental indenture, by Act of
said Holders delivered to the Company and the Trustee, the Company, when
authorized by or pursuant to a Board Resolution, and the Trustee may enter into
an indenture or indentures supplemental hereto for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
this Indenture or of modifying in any manner the rights of the Holders of
Securities and any related coupons under this Indenture; provided, however, that
no such supplemental indenture shall, without the consent of the Holder of each
Outstanding Security affected thereby:

                  (1) change the Stated Maturity of the principal of (or premium
or Make-Whole Amount, if any, on) or any installment of principal of or interest
on, any Security; or reduce the principal amount thereof or the rate or amount
of interest thereon or any Additional Amounts payable in respect thereof, or any
premium payable upon the redemption thereof, or change any obligation of the
Company to pay Additional Amounts pursuant to Section 1011 (except as
contemplated by Section 801(1) and permitted by Section 901(1)), or reduce the
amount of the principal of an Original Issue Discount Security that would be due
and payable upon a declaration of acceleration of the Maturity thereof pursuant
to Section 502 or the amount thereof provable in bankruptcy pursuant to Section
504, or adversely affect any right of repayment at the option of the Holder of
any Security, or change any Place of Payment where, or the currency or
currencies, currency unit or units or composite currency or currencies in which,
any Security or any premium or the interest thereon is payable, or impair the
right to institute suit for the enforcement of any such payment on or after the
Stated Maturity thereof, (or, in the case of redemption or repayment at the
option of the Holder, on or after the Redemption Date or the Repayment Date, as
the case may be), or


                                      -54-

<PAGE>   61



                  (2) reduce the percentage in principal amount of the
Outstanding Securities of any series, the consent of whose Holders is required
for any such supplemental indenture, or the consent of whose Holders is required
for any waiver with respect to such series (or compliance with certain
provisions of this Indenture or certain defaults hereunder and their
consequences) provided for in this Indenture, or reduce the requirements of
Section 1504 for quorum or voting, or

                  (3) modify any of the provisions of this Section, Section 513
or Section 1012, except to increase the required percentage to effect such
action or to provide that certain other provisions of this Indenture cannot be
modified or waived without the consent of the Holder of each Outstanding
Security affected thereby.

                  It shall not be necessary for any Act of Holders under this
Section to approve the particular form of any proposed supplemental indenture,
but it shall be sufficient if such Act shall approve the substance thereof.

                  A supplemental indenture which changes or eliminates any
covenant or other provision of this Indenture which has expressly been included
solely for the benefit of one or more particular series of Securities, or which
modifies the rights of the Holders of Securities of such series with respect to
such covenant or other provision, shall be deemed not to affect the rights under
this Indenture of the Holders of Securities of any other series.

                  SECTION 903. Execution of Supplemental Indentures. In
executing, or accepting the additional trusts created by, any supplemental
indenture permitted by this Article or the modification thereby of the trusts
created by this Indenture, the Trustee shall be entitled to receive, and shall
be fully protected in relying upon, an Opinion of Counsel stating that the
execution of such supplemental indenture is authorized or permitted by this
Indenture. The Trustee may, but shall not be obligated to, enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

                  SECTION 904. Effect of Supplemental Indentures. Upon the
execution of any supplemental indenture under this Article, this Indenture shall
be modified in accordance therewith, and such supplemental indenture shall form
a part of this Indenture for all purposes; and every Holder of Securities
theretofore or thereafter authenticated and delivered hereunder and of any
coupon appertaining thereto shall be bound thereby.

                  SECTION 905. Conformity with Trust Indenture Act. Every
supplemental indenture executed pursuant to this Article shall conform to the
requirements of the Trust Indenture Act as then in effect.

                  SECTION 906. Reference in Securities to Supplemental
Indentures. Securities of any series authenticated and delivered after the
execution of any supplemental indenture pursuant to this Article may, and shall,
if required by the Trustee, bear a notation in form approved by the Trustee as
to any matter provided for in such supplemental indenture. If the Company shall
so determine, new Securities of any series so modified as to conform, in the
opinion of the Trustee and the Company, to any such supplemental indenture may
be prepared

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<PAGE>   62



and executed by the Company and authenticated and delivered by the Trustee in
exchange for Outstanding Securities of such series.

                  SECTION 907.  Notice of Supplemental Indentures. Promptly
after the execution by the Company and the Trustee of any supplemental indenture
pursuant to the provisions of Section 902, the Company shall give notice thereof
to the Holders of each Outstanding Security affected, in the manner provided for
in Section 106, setting forth in general terms the substance of such
supplemental indenture.

                                   ARTICLE TEN

                                    COVENANTS

                  SECTION 1001. Payment of Principal, Premium (if any),
Make-Whole Amount (if any), Interest and Additional Amounts. The Company
covenants and agrees for the benefit of the Holders of each series of Securities
that it will duly and punctually pay the principal of (and premium or Make-Whole
Amount, if any) and interest on and any Additional Amounts payable in respect of
the Securities of that series in accordance with the terms of such series of
Securities, any coupons appertaining thereto and this Indenture. Unless
otherwise specified as contemplated by Section 301 with respect to any series of
Securities, any interest due on and any Additional Amounts payable in respect of
Bearer Securities on or before Maturity, other than Additional Amounts, if any,
payable as provided in Section 1011 in respect of principal of (or premium or
Make-Whole Amount, if any, on) such a Security, shall be payable only upon
presentation and surrender of the several coupons for such interest installments
as are evidenced thereby as they severally mature. Unless otherwise specified
with respect to Securities of any series pursuant to Section 301, at the option
of the Company, all payments of principal may be paid by check to the registered
Holder of the Registered Security or other person entitled thereto against
surrender of such Security.

                  SECTION 1002. Maintenance of Office or Agency. If Securities
of a series are issuable only as Registered Securities, the Company shall
maintain in each Place of Payment for any series of Securities an office or
agency where Securities of that series may be presented or surrendered for
payment or conversion, where Securities of that series may be surrendered for
registration of transfer or exchange and where notices and demands to or upon
the Company in respect of the Securities of that series and this Indenture may
be served. If Securities of a series are issuable as Bearer Securities, the
Company will maintain: (A) in the Borough of Manhattan, The City of New York, an
office or agency where any Registered Securities of that series may be presented
or surrendered for payment or conversion, where any Registered Securities of
that series may be surrendered for registration of transfer, where Securities of
that series may be surrendered for exchange, where notices and demands to or
upon the Company in respect of the Securities of that series and this Indenture
may be served and where Bearer Securities of that series and related coupons may
be presented or surrendered for payment or conversion in the circumstances
described in the following paragraph (and not otherwise); (B) subject to any
laws or regulations applicable thereto, in a Place of Payment for that series
which is located outside the United States, an office or agency where Securities
of that series and related coupons may be presented and surrendered for payment
(including payment of any Additional Amounts payable on Securities of that
series pursuant to Section 1011) or conversion; provided, however, that if

                                      -56-

<PAGE>   63



the Securities of that series are listed on the Luxembourg Stock Exchange or any
other stock exchange located outside the United States and such stock exchange
shall so require, the Company will maintain a Paying Agent for the Securities of
that series in Luxembourg or any other required city located outside the United
States, as the case may be, so long as the Securities of that series are listed
on such exchange; and (C) subject to any laws or regulations applicable thereto,
in a Place of Payment for that series located outside the United States an
office or agency where any Registered Securities of that series may be
surrendered for registration of transfer, where Securities of that series may be
surrendered for exchange and where notices and demands to or upon the Company in
respect of the Securities of that series and this Indenture may be served. The
Company will give prompt written notice to the Trustee of the location, and any
change in the location, of each such office or agency. If at any time the
Company shall fail to maintain any such required office or agency or shall fail
to furnish the Trustee with the address thereof, such presentations, surrenders,
notices and demands may be made or served at the Corporate Trust Office of the
Trustee, except that Bearer Securities of that series and the related coupons
may be presented and surrendered for payment (including payment of any
Additional Amounts payable on Bearer Securities of that series pursuant to
Section 1011) or conversion at the offices specified in the Security, in London,
England, and the Company hereby appoints the same as its agent to receive such
respective presentations, surrenders, notices and demands, and the Company
hereby appoint the Trustee its agent to receive all such presentations,
surrenders, notices and demands.

                  Unless otherwise specified with respect to any Securities
pursuant to Section 301, no payment of principal, premium or interest on or
Additional Amounts in respect of Bearer Securities shall be made at any office
or agency of the Company in the United States or by check mailed to any address
in the United States or by transfer to an account maintained with a bank located
in the United States; provided, however, that, if the Securities of a series are
payable in Dollars, payment of principal of and any premium and interest on any
Bearer Security (including any Additional Amounts payable on Securities of such
series pursuant to Section 1011) shall be made at the office of the Company's
Paying Agent in the Borough of Manhattan, The City of New York, if (but only if)
payment in Dollars of the full amount of such principal, premium or Make-Whole
Amount, interest or Additional Amounts, as the case may be, at all offices or
agencies outside the United States maintained for the purpose by the Company in
accordance with this Indenture, is illegal or effectively precluded by exchange
controls or other similar restrictions.

                  The Company may from time to time designate one or more other
offices or agencies where the Securities of one or more series may be presented
or surrendered for any or all of such purposes, and may from time to time
rescind such designations; provided, however, that no such designation or
rescission shall in any manner relieve the Company of its obligation to maintain
an office or agency in accordance with the requirements set forth above for
Securities of any series for such purposes. The Company will give prompt written
notice to the Trustee of any such designation or rescission and of any change in
the location of any such other office or agency. Unless otherwise specified with
respect to any Securities pursuant to Section 301 with respect to a series of
Securities, the Company hereby designates as a Place of Payment for each series
of Securities the office or agency of the Company in the Borough of Manhattan,
The City of New York, and initially appoints the Trustee at its Corporate Trust
Office as Paying

                                      -57-

<PAGE>   64



Agent in such city and as its agent to receive all such presentations,
surrenders, notices and demands.

                  Unless otherwise specified with respect to any Securities
pursuant to Section 301, if and so long as the Securities of any series (i) are
denominated in a Foreign Currency or (ii) may be payable in a Foreign Currency,
or so long as it is required under any other provision of the Indenture, then
the Company will maintain with respect to each such series of Securities, or as
so required, at least one exchange rate agent.

                  SECTION 1003. Money for Securities Payments to Be Held in
Trust. If the Company shall at any time act as its own Paying Agent with respect
to any series of any Securities and any related coupons, it will, on or before
each due date of the principal of (and premium or Make-Whole Amount, if any), or
interest on or Additional Amounts in respect of, any of the Securities of that
series, segregate and hold in trust for the benefit of the Persons entitled
thereto a sum in the currency or currencies, currency unit or units or composite
currency or currencies in which the Securities of such series are payable
(except as otherwise specified pursuant to Section 301 for the Securities of
such series) sufficient to pay the principal (and premium or Make-Whole Amount,
if any) or interest or Additional Amounts so becoming due until such sums shall
be paid to such Persons or otherwise disposed of as herein provided, and will
promptly notify the Trustee of its action or failure so to act.

                  Whenever the Company shall have one or more Paying Agents for
any series of Securities and any related coupons, it will, on or before each due
date of the principal of (and premium or Make-Whole Amount, if any), or interest
on or Additional Amounts in respect of, any Securities of that series, deposit
with a Paying Agent a sum (in the currency or currencies, currency unit or units
or composite currency or currencies described in the preceding paragraph)
sufficient to pay the principal (and premium or Make-Whole Amount, if any) or
interest or Additional Amounts, so becoming due, such sum to be held in trust
for the benefit of the Persons entitled to such principal, premium or interest
or Additional Amounts and (unless such Paying Agent is the Trustee) the Company
will promptly notify the Trustee of its action or failure so to act.

                  The Company will cause each Paying Agent other than the
Trustee to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee, subject to the provisions of this Section,
that such Paying Agent will

                  (1) hold all sums held by it for the payment of principal of
(and premium or Make-Whole Amount, if any) or interest on Securities in trust
for the benefit of the Persons entitled thereto until such sums shall be paid to
such Persons or otherwise disposed of as herein provided;

                  (2) give the Trustee notice of any default by the Company (or
any other obligor upon the Securities) in the making of any such payment of
principal (and premium or Make-Whole Amount, if any) or interest; and


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<PAGE>   65



                  (3) at any time during the continuance of any such default
upon the written request of the Trustee, forthwith pay to the Trustee all sums
so held in trust by such Paying Agent.

                  The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying Agent, such sums to be held by the Trustee
upon the same terms as those upon which such sums were held by the Company or
such Paying Agent; and, upon such payment by any Paying Agent to the Trustee,
such Paying Agent shall be released from all further liability with respect to
such sums.

                  Except as otherwise provided in the Securities of any series,
any money deposited with the Trustee or any Paying Agent, or then held by the
Company, in trust for the payment of the principal of (and premium or Make-Whole
Amount, if any) or interest on, or any Additional Amounts in respect of, any
Security of any series and remaining unclaimed for two years after such
principal (and premium or Make-Whole Amount, if any), interest or Additional
Amounts has become due and payable shall be paid to the Company upon Company
Request or (if then held by the Company) shall be discharged from such trust;
and the Holder of such Security shall thereafter, as an unsecured general
creditor, look only to the Company for payment of such principal of (and premium
or Make-Whole Amount, if any) or interest on, or any Additional Amounts in
respect of, any Security, without interest thereon, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Company cause to be published once, in an
Authorized Newspaper, notice that such money remains unclaimed and that, after a
date specified therein, which shall not be less than 30 days from the date of
such publication, any unclaimed balance of such money then remaining will be
repaid to the Company.

                  SECTION 1004. Intentionally Omitted.

                  SECTION 1005. Existence. Subject to Article Eight, the Company
will do or cause to be done all things necessary to preserve and keep in full
force and effect its existence, rights (by partnership agreement and statute)
and franchises; provided, however, that the Company shall not be required to
preserve any right or franchise if it determines that the preservation thereof
is no longer desirable in the conduct of its business and that the loss thereof
is not disadvantageous in any material respect to the Holders.

                  SECTION 1006. Maintenance of Properties. The Company will
cause all of its material properties used or useful in the conduct of its
business or the business of any Subsidiary to be maintained and kept in good
condition, repair and working order and supplied with all necessary equipment
and will cause to be made all necessary repairs, renewals, replacements,
betterments and improvements thereof, all as in the judgment of the Company may
be necessary so that the business carried on in connection therewith may be
properly and advantageously conducted at all times; provided, however, that the
Company and its Subsidiaries shall not be prevented from selling or otherwise
disposing of for value its properties in the ordinary course of its business.

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<PAGE>   66



                  SECTION 1007. Insurance. The Company will, and will cause each
of its Subsidiaries to, keep all of its insurable properties insured against
loss or damage at least equal to their then full insurable value with insurers
of recognized responsibility and having an A.M. Best policy holder's rating of 
not less than A-V.

                  SECTION 1008. Payment of Taxes and Other Claims. The Company
will pay or discharge or cause to be paid or discharged, before the same shall
become delinquent, (1) all taxes, assessments and governmental charges levied or
imposed upon it or any Subsidiary or upon the income, profits or property of the
Company or any Subsidiary, and (2) all lawful claims for labor, materials and
supplies which, if unpaid, might by law become a lien upon the property of the
Company or any Subsidiary; provided, however, that the Company shall not be
required to pay or discharge or cause to be paid or discharged any such tax,
assessment, charge or claim whose amount, applicability or validity is being
contested in good faith by appropriate proceedings or for which the Company has
set apart and maintains an adequate reserve.

                  SECTION 1009. Provision of Financial Information. Whether or
not the Company is subject to Section 13 or 15(d) of the Exchange Act, the
Company will, to the extent permitted under the Exchange Act, file with the
Commission the annual reports, quarterly reports and other documents which the
Company would have been required to file with the Commission pursuant to such
Sections 13 or 15(d) if the Company were so subject (the "Financial
Information"), such documents to be filed with the Commission on or prior to the
respective dates (the "Required Filing Dates") by which the Company would have
been required so to file such documents if the Company were so subject. The
Company also will in any event (x) within 15 days of each Required Filing Date:
(i) transmit by mail to all Holders of Notes, as their names and addresses
appear in the Security Register, without cost to such Holders, copies of the
Financial Information; and (ii) file with the Trustee copies of the Financial
Information, and (y) if filing such documents by the Company with the Commission
is not permitted under the Exchange Act, promptly upon written request and
payment of the reasonable cost of duplication and delivery, supply copies of
such documents to any prospective Holder.

                  SECTION 1010. Statement as to Compliance. The Company will, in
accordance with Section 314 of the TIA, deliver to the Trustee, within 120 days
after the end of each fiscal year, a brief certificate from the principal
executive officer, principal financial officer or principal accounting officer
as to his or her knowledge of the Company's compliance with all conditions and
covenants under this Indenture and, in the event of any noncompliance,
specifying such noncompliance and the nature and status thereof. For purposes of
this Section 1010, such compliance shall be determined without regard to any
period of grace or requirement of notice under this Indenture.

                  SECTION 1011. Additional Amounts. If any Securities of a
series provide for the payment of Additional Amounts, the Company will pay to
the Holder of any Security of such series or any coupon appertaining thereto
Additional Amounts as may be specified as contemplated by Section 301. Whenever
in this Indenture there is mentioned, in any context except in the case of
Section 502(1), the payment of the principal of or any premium or interest on,
or in respect of, any Security of any series or payment of any related coupon or
the net proceeds received on the sale or exchange of any Security of any series,
such mention shall be deemed to include mention of the payment of Additional
Amounts provided by the terms of such

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<PAGE>   67



series established pursuant to Section 301 to the extent that, in such context,
Additional Amounts are, were or would be payable in respect thereof pursuant to
such terms and express mention of the payment of Additional Amounts (if
applicable) in any provisions hereof shall not be construed as excluding
Additional Amounts in those provisions hereof where such express mention is not
made.

                  Except as otherwise specified as contemplated by Section 301,
if the Securities of a series provide for the payment of Additional Amounts, at
least 10 days prior to the first Interest Payment Date with respect to that
series of Securities (or if the Securities of that series will not bear interest
prior to Maturity, the first day on which a payment of principal and any premium
is made), and at least 10 days prior to each date of payment of principal and
any premium or interest if there has been any change with respect to the matters
set forth in the below-mentioned Officers' Certificate, the Company will furnish
the Trustee and the Company's principal Paying Agent or Paying Agents, if other
than the Trustee, with an Officers' Certificate instructing the Trustee and such
Paying Agent or Paying Agents whether such payment of principal of and any
premium or interest on the Securities of that series shall be made to Holders of
Securities of that series or any related coupons who are not United States
persons without withholding for or on account of any tax, assessment or other
governmental charge described in the Securities of the series. If any such
withholding shall be required, then such Officers' Certificate shall specify by
country the amount, if any, required to be withheld on such payments to such
Holders of Securities of that series or related coupons and the Company will pay
to the Trustee or such Paying Agent the Additional Amounts required by the terms
of such Securities. If the Trustee or any Paying Agent, as the case may be,
shall not so receive the above-mentioned certificate, then the Trustee or such
Paying Agent shall be entitled (i) to assume that no such withholding or
deduction is required with respect to any payment of principal or interest with
respect to any Securities of a series or related coupons until it shall have
received a certificate advising otherwise and (ii) to make all payments of
principal and interest with respect to the Securities of a series or related
coupons without withholding or deductions until otherwise advised. The Company
covenants to indemnify the Trustee and any Paying Agent for, and to hold them
harmless against, any loss, liability or expense reasonably incurred without
negligence or bad faith on their part arising out of or in connection with
actions taken or omitted by any of them or in reliance on any Officers'
Certificate furnished pursuant to this Section or in reliance on the Company's
not furnishing such an Officers' Certificate.

                  SECTION 1012. Waiver of Certain Covenants. The Company may
omit in any particular instance to comply with any term, provision or condition
set forth in Sections 1005 to 1009, inclusive, if before or after the time for
such compliance the Holders of at least a majority in principal amount of all
outstanding Securities of such series, by Act of such Holders, either waive such
compliance in such instance or generally waive compliance with such covenant or
condition, but no such waiver shall extend to or affect such covenant or
condition except to the extent so expressly waived, and, until such waiver shall
become effective, the obligations of the Company and the duties of the Trustee
in respect of any such term, provision or condition shall remain in full force
and effect.


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<PAGE>   68



                                 ARTICLE ELEVEN

                            REDEMPTION OF SECURITIES

                  SECTION 1101. Applicability of Article; Redemption to Maintain
REIT Status.

                  (a) Securities of any series which are redeemable before their
Stated Maturity shall be redeemable in accordance with their terms and (except
as otherwise specified as contemplated by Section 301 for Securities of any
series) in accordance with this Article.

                  (b) The Company shall redeem all or a portion of the
Securities of any series as necessary to comply with any requirement for the
Trust's continued qualification as a real estate investment trust under the
Internal Revenue Code of 1986, as amended.

                  SECTION 1102. Election to Redeem; Notice to Trustee. The
election of the Company to redeem any Securities shall be evidenced by or
pursuant to a Board Resolution. In case of any redemption at the election of the
Company of all or less than all of the Securities of any series, the Company
shall, at least 45 days prior to the giving of the notice of redemption in
Section 1104 (unless a shorter notice shall be satisfactory to the Trustee),
notify the Trustee of such Redemption Date and of the principal amount of
Securities of such series to be redeemed. In the case of any redemption of
Securities prior to the expiration of any restriction on such redemption
provided in the terms of such Securities or elsewhere in this Indenture, the
Company shall furnish the Trustee with an Officers' Certificate evidencing
compliance with such restriction.

                  SECTION 1103. Selection by Trustee of Securities to Be
Redeemed. If less than all the Securities of any series issued on the same day
with the same terms are to be redeemed, the particular Securities to be redeemed
shall be selected not more than 60 days prior to the Redemption Date by the
Trustee, from the Outstanding Securities of such series issued on such date with
the same terms not previously called for redemption, by such method as the
Trustee shall deem fair and appropriate and which may provide for the selection
for redemption of portions (equal to the minimum authorized denomination for
Securities of that series or any integral multiple thereof) of the principal
amount of Securities of such series of a denomination larger than the minimum
authorized denomination for Securities of that series.

                  The Trustee shall promptly notify the Company and the Security
Registrar (if other than itself) in writing of the Securities selected for
redemption and, in the case of any Securities selected for partial redemption,
the principal amount thereof to be redeemed.

                  For all purposes of this Indenture, unless the context
otherwise requires, all provisions relating to the redemption of Securities
shall relate, in the case of any Security redeemed or to be redeemed only in
part, to the portion of the principal amount of such Security which has been or
is to be redeemed.

                  SECTION 1104. Notice of Redemption. Notice of redemption shall
be given in the manner provided in Section 106, not less than 30 days nor more
than 60 days prior to the Redemption Date, unless a shorter period is specified
by the terms of such series established

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<PAGE>   69



pursuant to Section 301, to each Holder of Securities to be redeemed, but
failure to give such notice in the manner herein provided to the Holder of any
Security designated for redemption as a whole or in part, or any defect in the
notice to any such Holder, shall not affect the validity of the proceedings for
the redemption of any other such Security or portion thereof.

                  Any notice that is mailed to the Holders of Registered
Securities in the manner herein provided shall be conclusively presumed to have
been duly given, whether or not the Holder receives the notice.

                  All notices of redemption shall state:

                  (1) the Redemption Date,

                  (2) the Redemption Price, accrued interest to the Redemption
Date payable as provided in Section 1106, if any, and Additional Amounts, if
any,

                  (3) if less than all Outstanding Securities of any series are
to be redeemed, the identification (and, in the case of partial redemption, the
principal amount) of the particular Security or Securities to be redeemed,

                  (4) in case any Security is to be redeemed in part only, the
notice which relates to such Security shall state that on and after the
Redemption Date, upon surrender of such Security, the holder will receive,
without a charge, a new Security or Securities of authorized denominations for
the principal amount thereof remaining unredeemed,

                  (5) that on the Redemption Date the Redemption Price and
accrued interest to the Redemption Date payable as provided in Section 1106, if
any, will become due and payable upon each such Security, or the portion
thereof, to be redeemed and, if applicable, that interest thereon shall cease to
accrue on and after said date unless the Company shall default in the payment of
the Redemption Price and any accrued interest thereon,

                  (6) the Place or Places of Payment where such Securities,
together in the case of Bearer Securities with all coupons appertaining thereto,
if any, maturing after the Redemption Date, are to be surrendered for payment of
the Redemption Price and accrued interest, if any, or for conversion,

                  (7) that the redemption is for a sinking fund, if such is the
case,

                  (8) that, unless otherwise specified in such notice, Bearer
Securities of any series, if any, surrendered for redemption must be accompanied
by all coupons maturing subsequent to the date fixed for redemption or the
amount of any such missing coupon or coupons will be deducted from the
Redemption Price, unless security or indemnity satisfactory to the Company and
the Trustee for such series and any Paying Agent is furnished,

                  (9) if Bearer Securities of any series are to be redeemed and
any Registered Securities of such series are not to be redeemed, and if such
Bearer Securities may be exchanged for Registered Securities not subject to
redemption on this Redemption Date pursuant to Section


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<PAGE>   70



305 or otherwise, the last date, as determined by the Company, on which such
exchanges may be made,

                  (10) the CUSIP number of such Security, if any, and

                  (11) if applicable, that a Holder of Securities who desires to
convert Securities for redemption must satisfy the requirements for conversion
contained in such Securities, the then existing conversion price or rate, and
the date and time when the option to convert shall expire.

                  Notice of redemption of Securities to be redeemed shall be
given by the Company or, at the Company's request, by the Trustee in the name
and at the expense of the Company.

                  SECTION 1105. Deposit of Redemption Price. At least one
Business Day prior to any Redemption Date, the Company shall deposit with the
Trustee or with a Paying Agent (or, if the Company is acting as its own Paying
Agent, segregate and hold in trust as provided in Section 1003) an amount of
money in the currency or currencies, currency unit or units or composite
currency or currencies in which the Securities of such series are payable
(except as otherwise specified pursuant to Section 301 for the Securities of
such series) sufficient to pay on the Redemption Date the Redemption Price of,
and (except if the Redemption Date shall be an Interest Payment Date) accrued
interest on, all the Securities or portions thereof which are to be redeemed on
that date.

                  SECTION 1106. Securities Payable on Redemption Date. Notice of
redemption having been given as aforesaid, the Securities so to be redeemed
shall, on the Redemption Date, become due and payable at the Redemption Price
therein specified in the currency or currencies, currency unit or units or
composite currency or currencies in which the Securities of such series are
payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) (together with accrued interest, if any, to the
Redemption Date), and from and after such date (unless the Company shall default
in the payment of the Redemption Price and accrued interest) such Securities
shall, if the same were interest-bearing, cease to bear interest and the coupons
for such interest appertaining to any Bearer Securities so to be redeemed,
except to the extent provided below, shall be void. Upon surrender of any such
Security for redemption in accordance with said notice, together with all
coupons, if any, appertaining thereto maturing after the Redemption Date, such
Security shall be paid by the Company at the Redemption Price, together with
accrued interest, if any, to the Redemption Date; provided, however, that
installments of interest on Bearer Securities whose Stated Maturity is on or
prior to the Redemption Date shall be payable only at an office or agency
located outside the United States (except as otherwise provided in Section 1002)
and, unless otherwise specified as contemplated by Section 301, only upon
presentation and surrender of coupons for such interest; and provided further
that, except as otherwise provided with respect to Securities convertible into
Common Shares or Preferred Shares, installments of interest on Registered
Securities whose Stated Maturity is on or prior to the Redemption Date shall be
payable to the Holders of such Securities, or one or more Predecessor
Securities, registered as such at the close of business on the relevant Regular
Record Dates according to their terms and the provisions of Section 307.


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<PAGE>   71



                  If any Bearer Security surrendered for redemption shall not be
accompanied by all appurtenant coupons maturing after the Redemption Date, such
Security may be paid after deducting from the Redemption Price an amount equal
to the face amount of all such missing coupons, or the surrender of such missing
coupon or coupons may be waived by the Company and the Trustee if there be
furnished to them such security or indemnity as they may require to save each of
them and any Paying Agent harmless. If thereafter the Holder of such Security
shall surrender to the Trustee or any Paying Agent any such missing coupon in
respect of which a deduction shall have been made from the Redemption Price,
such Holder shall be entitled to receive the amount so deducted; provided,
however, that interest represented by coupons shall be payable only at an office
or agency located outside the United States (except as otherwise provided in
Section 1002) and, unless otherwise specified as contemplated by Section 301,
only upon presentation and surrender of those coupons.

                  If any Security called for redemption by the Company shall not
be so paid upon surrender thereof for redemption by reason of a failure to
comply with Section 1105, the principal (and premium or Make-Whole Amount, if
any) shall, until paid, bear interest from the Redemption Date at the rate borne
by the Security.

                  SECTION 1107. Securities Redeemed in Part. Any Registered
Security which is to be redeemed only in part (pursuant to the provisions of
this Article) shall be surrendered at a Place of Payment therefor (with, if the
Company or the Trustee so requires, due endorsement by, or a written instrument
of transfer in form satisfactory to the Company and the Trustee duly executed
by, the Holder thereof or his attorney duly authorized in writing) and the
Company shall execute and the Trustee shall authenticate and deliver to the
Holder of such Security without service charge a new Security or Securities of
the same series, of any authorized denomination as requested by such Holder in
aggregate principal amount equal to and in exchange for the unredeemed portion
of the principal of the Security so surrendered.

                                 ARTICLE TWELVE

                                  SINKING FUNDS

                  SECTION 1201. Applicability of Article. The provisions of this
Article shall be applicable to any sinking fund for the retirement of Securities
of a series except as otherwise specified as contemplated by Section 301 for
Securities of such series.

                  The minimum amount of any sinking fund payment provided for by
the terms of Securities of any series is herein referred to as a "mandatory
sinking fund payment", and any payment in excess of such minimum amount provided
for by the terms of such Securities of any series is herein referred to as an
"optional sinking fund payment". If provided for by the terms of any Securities
of any series, the cash amount of any mandatory sinking fund payment may be
subject to reduction as provided in Section 1202. Each sinking fund payment
shall be applied to the redemption of Securities of any series as provided for
by the terms of Securities of such series.

                  SECTION 1202. Satisfaction of Sinking Fund Payments with
Securities. The Company may, in satisfaction of all or any part of any mandatory
sinking fund payment with

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<PAGE>   72



respect to the Securities of a series, (1) deliver Outstanding Securities of
such series (other than any previously called for redemption) together in the
case of any Bearer Securities of such series with all unmatured coupons
appertaining thereto and (2) apply as a credit Securities of such series which
have been redeemed whether at the election of the Company pursuant to the terms
of such Securities or through the application of permitted optional sinking fund
payments pursuant to the terms of such Securities, as provided for by the terms
of such Securities, or which have otherwise been acquired by the Company;
provided that such Securities so delivered or applied as a credit have not been
previously so credited. Such Securities shall be received and credited for such
purpose by the Trustee at the applicable Redemption Price specified in such
Securities for redemption through operation of the sinking fund and the amount
of such mandatory sinking fund payment shall be reduced accordingly.

                  SECTION 1203. Redemption of Securities for Sinking Fund. Not
less than 60 days prior to each sinking fund payment date for Securities of any
series, the Company will deliver to the Trustee an Officers' Certificate
specifying the amount of the next ensuing mandatory sinking fund payment for the
series pursuant to the terms of that series, the portion thereof, if any, which
is to be satisfied by payment of such in the currency or currencies, currency
unit or units or composite currency or currencies in which the Securities of
such series are payable (except as otherwise specified pursuant to Section 301
for the securities of such series) and the portion thereof, if any, which is to
be satisfied by delivering and crediting Securities of that series pursuant to
Section 1202, and the optional amount, if any, to be added in cash to the next
ensuing mandatory sinking fund payment, and will also deliver to the Trustee any
Securities to be so delivered and credited. If such Officers' Certificate shall
specify an optional amount to be added in cash to the next ensuing mandatory
sinking fund payment, the Company shall thereupon be obligated to pay the amount
therein specified. Not less than 30 days before each such sinking fund payment
date the Trustee shall select the Securities to be redeemed upon such sinking
fund payment date in the manner specified in Section 1103 and cause notice of
the redemption thereof to be given in the name of an at the expense of the
Company in the manner provided in Section 1104. Such notice having been duly
given, the redemption of such Securities shall be made upon the terms and in the
manner stated in Sections 1106 and 1107.

                                ARTICLE THIRTEEN

                       REPAYMENT AT THE OPTION OF HOLDERS

                  SECTION 1301. Applicability of Article. Repayment of
Securities of any series before their Stated Maturity at the option of Holders
thereof shall be made in accordance with the terms of such Securities, if any,
and (except as otherwise specified by the terms of such series established
pursuant to Section 301) in accordance with this Article.

                  SECTION 1302. Repayment of Securities. Securities of any
series subject to repayment in whole or in part at the option of the Holders
thereof will, unless otherwise provided in the terms of such Securities, be
repaid at a price equal to the principal amount thereof, together with interest,
if any, thereon accrued to the Repayment Date specified in or pursuant to the
terms of such Securities. The Company covenants that at least one Business Day
prior to the Repayment Date it will deposit with the Trustee or with a Paying
Agent (or, if the Company is

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<PAGE>   73
acting as its own Paying Agent, segregate and hold in trust as provided in
Section 1003) an amount of money in the currency or currencies, currency unit or
units or composite currency or currencies in which the Securities of such series
are payable (except as otherwise specified pursuant to Section 301 for the
Securities of such series) sufficient to pay the principal (or, if so provided
by the terms of the Securities of any series, a percentage of the principal) of,
and (except if the Repayment Date shall be an Interest Payment Date) accrued
interest on, all the Securities or portions thereof, as the case may be, to be
repaid on such date.

                  SECTION 1303. Exercise of Option. Securities of any series
subject to repayment at the option of the Holders thereof will contain an
"Option to Elect Repayment" form on the reverse of such Securities. In order for
any Security to be repaid at the option of the Holder, the Trustee must receive
at the Place of Payment therefor specified in the terms of such Security (or at
such other place or places of which the Company shall from time to time notify
the Holders of such Securities) not earlier than 60 days nor later than 30 days
prior to the Repayment Date (1) the Security so providing for such repayment
together with the "Option to Elect Repayment" form on the reverse thereof duly
completed by the Holder (or by the Holder's attorney duly authorized in writing)
or (2) a telegram, telex, facsimile transmission or a letter from a member of a
national securities exchange, or the National Association of Securities Dealers,
Inc. ("NASD"), or a commercial bank or trust company in the United States
setting forth the name of the Holder of the Security, the principal amount of
the Security, the principal amount of the Security to be repaid, the CUSIP
number, if any, or a description of the tenor and terms of the Security, a
statement that the option to elect repayment is being exercised thereby and a
guarantee that the Security to be repaid, together with the duly completed form
entitled "Option to Elect Repayment" on the reverse of the Security, will be
received by the Trustee not later than the fifth Business Day after the date of
such telegram, telex, facsimile transmission or letter; provided, however, that
such telegram, telex, facsimile transmission or letter shall only be effective
if such Security and form duly completed are received by the Trustee by such
fifth Business Day. If less than the entire principal amount of such Security is
to be repaid in accordance with the terms of such Security, the principal amount
of such Security to be repaid, in increments of the minimum denomination for
Securities of such series, and the denomination or denominations of the Security
or Securities to be issued to the Holder for the portion of the principal amount
of such Security surrendered that is not to be repaid, must be specified. The
principal amount of any Security providing for repayment at the option of the
Holder thereof may not be repaid in part if, following such repayment, the
unpaid principal amount of such Security would be less than the minimum
authorized denomination of Securities of the series of which such Security to be
repaid is a part. Except as otherwise may be provided by the terms of any
Security providing for repayment at the option of the Holder thereof, exercise
of the repayment option by the Holder shall be irrevocable unless waived by the
Company.

                  SECTION 1304. When Securities Presented for Repayment Become
Due and Payable. If Securities of any series that provide for repayment at the
option of the Holders thereof shall have been surrendered as provided in this
Article and as provided by or pursuant to the terms of such Securities, such
Securities or the portion thereof, as the case may be, to be repaid shall become
due and payable and shall be paid by the Company on the Repayment Date therein
specified, and on and after such Repayment Date (unless the Company shall
default in the payment of such Securities on such Repayment Date) such
Securities shall, if the same were interest-bearing, cease to bear interest and
the coupons for such interest appertaining to any

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<PAGE>   74



Bearer Securities so to be repaid, except to the extent provided below, shall be
void. Upon surrender of any such Security for repayment in accordance with such
provisions, together with coupons, if any, appertaining thereto maturing after
the Repayment Date, the principal amount of such Security so to be repaid shall
be paid by the Company, together with accrued interest, if any, on the Repayment
Date; provided, however, that coupons whose Stated Maturity is on or prior to
the Repayment Date shall be payable at an office or agency located outside the
United States (except as otherwise provided in Section 1002) and, unless
otherwise specified pursuant to Section 301, only upon presentation and
surrender of such coupons; and provided further that, in the case of Registered
Securities, installments of interest, if any, whose Stated Maturity is on or
prior to the Repayment Date shall be payable (but with interest thereon, unless
the Company shall default in the payment thereof) to the Holders of such
Securities, or one or more Predecessor Securities, registered as such at the
close of business on the relevant Regular Record Dates according to their terms
and the provisions of Section 307.

                  If any Bearer Security surrendered for repayment shall not be
accompanied by all appurtenant coupons maturing after the Repayment Date, such
Security may be paid after deducting from the amount payable therefor as
provided in Section 1302 an amount equal to the face amount of all such missing
coupons, or the surrender of such missing coupon or coupons may be waived by the
Company and the Trustee if there be furnished to it such security or indemnity
as they may require to save it and any Paying Agent harmless. If thereafter the
Holder of such Security shall surrender to the Trustee or any Paying Agent any
such missing coupon in respect of which a deduction shall have been made as
provided in the preceding sentence, such Holder shall be entitled to receive the
amount so deducted; provided, however, that interest represented by coupons
shall be payable only at an office or agency located outside the United States
(except as otherwise provided in Section 1002) and, unless otherwise specified
as contemplated by Section 301, only upon presentation and surrender of those
coupons.

                  If the principal amount of any Security surrendered for
repayment shall not be so repaid upon surrender thereof by reason of a failure
by the Company to comply with this Section 1304, such principal amount (together
with interest, if any, thereon accrued to such Repayment Date) shall, until
paid, bear interest from the Repayment Date at the rate of interest or Yield to
Maturity (in the case of Original Issue Discount Securities) set forth in such
Security.

                  SECTION 1305. Securities Repaid in Part. Upon surrender of any
Registered Security which is to be repaid in part only, the Company shall
execute and the Trustee shall authenticate and deliver to the Holder of such
Security, without service charge and at the expense of the Company, a new
Registered Security or Securities of the same series, of any authorized
denomination specified by the Holder, in an aggregate principal amount equal to
and in exchange for the portion of the principal of such Security so surrendered
which is not to be repaid.

                                ARTICLE FOURTEEN

                       DEFEASANCE AND COVENANT DEFEASANCE

                  SECTION 1401. Applicability of Article; Company's Option to
Effect Defeasance or Covenant Defeasance. If, pursuant to Section 301, provision
is made for either or

                                      -68-




<PAGE>   75



both of (a) defeasance of the Securities of or within a series under Section
1402 or (b) covenant defeasance of the Securities of or within a series under
Section 1403, then the provisions of such Section or Sections, as the case may
be, together with the other provisions of this Article (with such modifications
thereto as may be specified pursuant to Section 301 with respect to any
Securities), shall be applicable to such Securities and any coupons appertaining
thereto, and the Company may at its option by Board Resolution, at any time,
with respect to such Securities and any coupons appertaining thereto, elect to
have Section 1402 (if applicable) or Section 1403 (if applicable) be applied to
such Outstanding Securities and any coupons appertaining thereto upon compliance
with the conditions set forth below in this Article.

                  SECTION 1402. Defeasance and Discharge. Upon the Company's
exercise of the above option applicable to this Section with respect to any
Securities of or within a series, the Company shall be deemed to have been
discharged from its obligations with respect to such Outstanding Securities and
any coupons appertaining thereto on the date the conditions set forth in Section
1404 are satisfied (hereinafter, "defeasance"). For this purpose, such
defeasance means that the Company shall be deemed to have paid and discharged
the entire indebtedness represented by such Outstanding Securities and any
coupons appertaining thereto, which shall thereafter be deemed to be
"Outstanding" only for the purposes of Section 1405 and the other Sections of
this Indenture referred to in clauses (A) and (B) below, and to have satisfied
all of its other obligations under such Securities and any coupons appertaining
thereto and this Indenture insofar as such Securities and any coupons
appertaining thereto are concerned (and the Trustee, at the expense of the
Company, shall execute proper instruments acknowledging the same), except for
the following which shall survive until otherwise terminated or discharged
hereunder: (A) the rights of Holders of such Outstanding Securities and any
coupons appertaining thereto to receive, solely from the trust fund described in
Section 1404 and as more fully set forth in such Section, payments in respect of
the principal of (and premium or Make-Whole Amount, if any) and interest, if
any, on such Securities and any coupons appertaining thereto when such payments
are due, (B) the Company's obligations with respect to such Securities under
Sections 305, 306, 1002 and 1003 and with respect to the payment of Additional
Amounts, if any, on such Securities as contemplated by Section 1011, (C) the
rights, powers, trusts, duties and immunities of the Trustee hereunder and (D)
this Article. Subject to compliance with this Article Fourteen, the Company may
exercise its option under this Section notwithstanding the prior exercise of its
option under Section 1403 with respect to such Securities and any coupons
appertaining thereto.

                  SECTION 1403. Covenant Defeasance. Upon the Company's exercise
of the above option applicable to this Section with respect to any Securities of
or within a series, the Company shall be released from its obligations under
Sections 1004 to 1009, inclusive and, if specified pursuant to Section 301, its
obligations under any other covenant, with respect to such Outstanding
Securities and coupons appertaining thereto on and after the date the conditions
set forth in Section 1404 are satisfied (hereinafter, "covenant defeasance"),
and such Securities and any coupons appertaining thereto shall thereafter be
deemed to be not "Outstanding" for the purposes of any direction, waiver,
consent or declaration or Act of Holders (and the consequences of any thereof)
in connection with Sections 1004 to 1009, inclusive, or such other covenant, but
shall continue to be deemed "Outstanding" for all other purposes hereunder. For
this purpose, such covenant defeasance means that, with respect to such
Outstanding Securities and any coupons appertaining thereto, the Company may
omit to comply with and shall have no liability in respect of any term,
condition or limitation set forth in any such Section or such other

                                      -69-




<PAGE>   76



covenant, whether directly or indirectly, by reason of any reference elsewhere
herein to any such Section or such other covenant or by reason of reference in
any Section or such other covenant to any other provision herein or in any other
document and such omission to comply shall not constitute a default or an Event
of Default under Section 501(4) or 501(8) or otherwise, as the case may be, but,
except as specified above, the remainder of this Indenture and such Securities
and any coupons appertaining thereto shall be unaffected thereby.

                  SECTION 1404. Conditions to Defeasance or Covenant Defeasance.
The following shall be the conditions to application of Section 1402 or Section
1403 to any Outstanding Securities of or within a series and any coupons
appertaining thereto:

                           (a) The Company shall irrevocably have deposited or
caused to be deposited with the Trustee (or another trustee satisfying the
requirements of Section 607 who shall agree to comply with the provisions of
this Article Fourteen applicable to it) as trust funds in trust for the purpose
of making the following payments, specifically pledged as security for, and
dedicated solely to, the benefit of the Holders of such Securities and any
coupons appertaining thereto, (1) an amount in such currency, currencies or
currency unit in which such Securities and any coupons appertaining thereto are
then specified as payable at Stated Maturity, or (2) Government Obligations
applicable to such Securities and coupons appertaining thereto (determined on
the basis of the currency, currencies or currency unit in which such Securities
and coupons appertaining thereto are then specified as payable at Stated
Maturity) which through the scheduled payment of principal and interest in
respect thereof in accordance with their terms will provide, not later than one
day before the due date of any payment of principal of (and premium or
Make-Whole Amount, if any) and interest, if any, on such Securities and any
coupons appertaining thereto, money in an amount, or (3) a combination thereof,
in any case, in an amount, sufficient, without consideration of any reinvestment
of such principal and interest, in the opinion of a nationally recognized firm
of independent public accountants expressed in a written certification thereof
delivered the Trustee, to pay and discharge, and which shall be applied by the
Trustee (or other qualifying trustee) to pay and discharge, the principal of
(and premium or Make-Whole Amount, if any) and interest, if any, on such
Outstanding Securities and any coupons appertaining thereto on the Stated
Maturity of such principal or installment of principal or interest or analogous
payments applicable to such Outstanding Securities and any coupons appertaining
thereto on the day on which such payments are due and payable in accordance with
the terms of this Indenture and of such Securities and any coupons appertaining
thereto.

                           (b) Such defeasance or covenant defeasance shall not
result in a breach or violation of, or constitute a default under, this
Indenture or any other material agreement or instrument to which the Company is
a party or by which it is bound.

                           (c) No Event of Default or event which with notice or
lapse of time or both would become an Event of Default with respect to such
Securities and any coupons appertaining thereto shall have occurred and be
continuing on the date of such deposit or, insofar as Sections 501(6) and 501(7)
are concerned, at any time during the period ending on the 91st day after the
date of such deposit (it being understood that this condition shall not be
deemed satisfied until the expiration of such period).

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<PAGE>   77



                           (d) In the case of an election under Section 1402,
the Company shall have delivered to the Trustee an Opinion of Counsel stating
that (i) the Company has received from, or there has been published by, the
Internal Revenue Service a ruling, or (ii) since the date of execution of this
Indenture, there has been a change in the applicable Federal income tax law, in
either case to the effect that, and based thereon such opinion shall confirm
that, the Holders of such Outstanding Securities and any coupons appertaining
thereto will not recognize income, gain or loss for Federal income tax purposes
as a result of such defeasance and will be subject to Federal income tax on the
same amounts, in the same manner and at the same times as would have been the
case if such defeasance had not occurred.

                           (e) In the case of an election under Section 1403,
the Company shall have delivered to the Trustee an Opinion of Counsel to the
effect that the Holders of such Outstanding Securities and any coupons
appertaining thereto will not recognize income, gain or loss for Federal income
tax purposes as a result of such covenant defeasance and will be subject to
Federal income tax on the same amounts, in the same manner and at the same times
as would have been the case if such covenant defeasance had not occurred.

                           (f) The Company shall have delivered to the Trustee
an Officers' Certificate and an Opinion of Counsel, each stating that all
conditions precedent to the defeasance under Section 1402 or the covenant
defeasance under Section 1403 (as the case may be) have been complied with and
an Opinion of Counsel to the effect that either (i) as a result of a deposit
pursuant to subsection (a) above and the related exercise of the Company's
option under Section 1402 or Section 1403 (as the case may be), registration is
not required under the Investment Company Act of 1940, as amended, by the
Company with respect to the trust funds representing such deposit or by the
Trustee for such trust funds or (ii) all necessary registrations under said Act
have been effected.

                           (g) Notwithstanding any other provisions of this
Section, such defeasance or covenant defeasance shall be effected in compliance
with any additional or substitute terms, conditions or limitations which may be
imposed on the Company in connection therewith pursuant to Section 301.

                  SECTION 1405. Deposited Money and Government Obligations to Be
Held in Trust; Other Miscellaneous Provisions. Subject to the provisions of the
last paragraph of Section 1003, all money and Government Obligations (or other
property as may be provided pursuant to Section 301) (including the proceeds
thereof) deposited with the Trustee (or other qualifying trustee, collectively
for purposes of this Section 1405, the "Trustee") pursuant to Section 1404 in
respect of any Outstanding Securities of any series and any coupons appertaining
thereto shall be held in trust and applied by the Trustee, in accordance with
the provisions of such Securities and any coupons appertaining thereto and this
Indenture, to the payment, either directly or through any Paying Agent as the
Trustee may determine, to the Holders of such Securities and any coupons
appertaining thereto of all sums due and to become due thereon in respect of
principal (and premium or Make-Whole Amount, if any) and interest and Additional
Amounts, if any, but such money need not be segregated from other funds except
to the extent required by law.

                  Unless otherwise specified with respect to any Security
pursuant to Section 301, if, after a deposit referred to in Section 1404(a) has
been made, (a) the Holder of a Security in

                                      -71-




<PAGE>   78



respect of which such deposit was made is entitled to, and does, elect pursuant
to Section 301 or the terms of such Security to receive payment in a currency or
currency unit other than that in which the deposit pursuant to Section 1404(a)
has been made in respect of such Security, or (b) a Conversion Event occurs in
respect of the currency or currency unit in which the deposit pursuant to
Section 1404(a) has been made, the indebtedness represented by such Security and
any coupons appertaining thereto shall be deemed to have been, and will be,
fully discharged and satisfied through the payment of the principal of (and
premium or Make-Whole Amount, if any), and interest, if any, on such Security as
the same becomes due out of the proceeds yielded by converting (from time to
time as specified below in the case of any such election) the amount or other
property deposited in respect of such Security into the currency or currency
unit in which such Security becomes payable as a result of such election or
Conversion Event based on the applicable market exchange rate for such currency
or currency unit in effect on the second Business Day prior to each payment
date, except, with respect to a Conversion Event, for such currency or currency
unit in effect (as nearly as feasible) at the time of the Conversion Event.

                  The Company shall pay and indemnify the Trustee against any
tax, fee or other charge imposed on or assessed against the Government
Obligations deposited pursuant to Section 1404 or the principal and interest
received in respect thereof other than any such tax, fee or other charge which
by law is for the account of the Holders of such Outstanding Securities and any
coupons appertaining thereto.

                  Anything in this Article to the contrary notwithstanding,
subject to Section 606, the Trustee shall deliver or pay to the Company from
time to time upon Company Request any money or Government Obligations (or other
property and any proceeds therefrom) held by it as provided in Section 1404
which, in the opinion of a nationally recognized firm of independent public
accountants expressed in a written certification thereof delivered to the
Trustee, are in excess of the amount thereof which would then be required to be
deposited to effect a defeasance or covenant defeasance, as applicable, in
accordance with this Article.

                                 ARTICLE FIFTEEN

                        MEETINGS OF HOLDERS OF SECURITIES

                  SECTION 1501. Purposes for Which Meetings May Be Called. A
meeting of Holders of Securities of any series may be called at any time and
from time to time pursuant to this Article to make, give or take any request,
demand, authorization, direction, notice, consent, waiver or other action
provided by this Indenture to be made, given or taken by Holders of Securities
of such series.

                  SECTION 1502. Call, Notice and Place of Meetings.

                           (a) The Trustee may at any time call a meeting of
Holders of Securities of any series for any purpose specified in Section 1501,
to be held at such time and at such place in the Borough of Manhattan, The City
of New York, or in London as the Trustee shall determine. Notice of every
meeting of Holders of Securities of any series, setting forth the time and the
place of such meeting and in general terms the action proposed to be taken at
such

                                      -72-




<PAGE>   79



meeting, shall be given, in the manner provided in Section 106, not less than 21
nor more than 180 days prior to the date fixed for the meeting.

                           (b) In case at any time the Company pursuant to a
Board Resolution, or the Holders of at least 10% in principal amount of the
Outstanding Securities of any series, shall have requested the Trustee to call a
meeting of the Holders of Securities of such series for any purpose specified in
Section 1501, by written request setting forth in reasonable detail the action
proposed to be taken at the meeting, and the Trustee shall not have made the
first publication of the notice of such meeting within 21 days after receipt of
such request or shall not thereafter proceed to cause the meeting to be held as
provided herein, then the Company or the Holders of Securities of such series in
the amount above specified, as the case may be, may determine the time and the
place in the Borough of Manhattan, The City of New York, or in London for such
meeting and may call such meeting for such purposes by giving notice thereof as
provided in subsection (a) of this Section.

                  SECTION 1503. Persons Entitled to Vote at Meetings. To be
entitled to vote at any meeting of Holders of Securities of any series, a Person
shall be (1) a Holder of one or more Outstanding Securities of such series, or
(2) a Person appointed by an instrument in writing as proxy for a Holder or
Holders of one or more outstanding Securities of such series by such Holder or
Holders. The only Persons who shall be entitled to be present or to speak at any
meeting of Holders of Securities of any series shall be the Persons entitled to
vote at such meeting and their counsel, any representatives of the Trustee and
its counsel and any representatives of the Company and its counsel.

                  SECTION 1504. Quorum; Action. The Persons entitled to vote a
majority in principal amount of the Outstanding Securities of a series shall
constitute a quorum for a meeting of Holders of Securities of such series;
provided, however, that if any action is to be taken at such meeting with
respect to a consent or waiver which this Indenture expressly provides may be
given by the Holders of not less than a specified percentage in principal amount
of the Outstanding Securities of a series, the Persons entitled to vote such
specified percentage in principal amount of the Outstanding Securities of such
series shall constitute a quorum. In the absence of a quorum within 30 minutes
after the time appointed for any such meeting, the meeting shall, if convened at
the request of Holders of Securities of such series, be dissolved. In any other
case the meeting may be adjourned for a period of not less than 10 days as
determined by the chairman of the meeting prior to the adjournment of such
meeting. In the absence of a quorum at any such adjourned meeting, such
adjourned meeting may be further adjourned for a period of not less than 10 days
as determined by the chairman of the meeting prior to the adjournment of such
adjourned meeting. Notice of the reconvening of any adjourned meeting shall be
given as provided in Section 1502(a), except that such notice need be given only
once not less than five days prior to the date on which the meeting is scheduled
to be reconvened. Notice of the reconvening of any adjourned meeting shall state
expressly the percentage, as provided above, of the principal amount of the
Outstanding Securities of such series which shall constitute a quorum.

                  Except as limited by the proviso to Section 902, any
resolution presented to a meeting or adjourned meeting duly reconvened at which
a quorum is present as aforesaid may be adopted by the affirmative vote of the
Holders of a majority in principal amount of the

                                      -73-




<PAGE>   80



Outstanding Securities of that series; provided, however, that, except as
limited by the proviso to Section 902, any resolution with respect to any
request, demand, authorization, direction, notice, consent, waiver or other
action which this Indenture expressly provides may be made, given or taken by
the Holders of a specific percentage, which is less than a majority, in
principal amount of the Outstanding Securities of a series may be adopted at a
meeting or an adjourned meeting duly reconvened and at which a quorum is present
as aforesaid by the affirmative vote of the Holders of such specified percentage
in principal amount of the Outstanding Securities of that series.

                  Any resolution passed or decision taken at any meeting of
Holders of Securities of any series duly held in accordance with this Section
shall be binding on all the Holders of Securities of such series and the related
coupons, whether or not present or represented at the meeting.

                  Notwithstanding the foregoing provisions of this Section 1504,
if any action is to be taken at a meeting of Holders of Securities of any series
with respect to any request, demand, authorization, direction, notice, consent,
waiver or other act that this Indenture expressly provides may be made, given or
taken by the Holders of a specified percentage in principal amount of all
Outstanding Securities affected thereby, or of the Holders of such series and
one or more additional series:

                                 (i) there shall be no minimum quorum require-
ment for such meeting; and

                                 (ii the principal amount of the Outstanding
Securities of such series that vote in favor of such request, demand,
authorization, direction, notice, consent, waiver or other action shall be taken
into account in determining whether such request, demand, authorization,
direction, notice, consent, waiver or other action has been made, given or taken
under this Indenture.

                  SECTION 1505.  Determination of Voting Rights; Conduct and 
Adjournment of Meetings.

                           (a) Notwithstanding any provisions of this Indenture,
the Trustee may make such reasonable regulations as it may deem advisable for
any meeting of Holders of Securities of a series in regard to proof of the
holding of Securities of such series and of the appointment of proxies and in
regard to the appointment and duties of inspectors of votes, the submission and
examination of proxies, certificates and other evidence of the right to vote,
and such other matters concerning the conduct of the meeting as it shall deem
appropriate. Except as otherwise permitted or required by any such regulations,
the holding of Securities shall be proved in the manner specified in Section 104
and the appointment of any proxy shall be proved in the manner specified in
Section 104 or by having the signature of the Person executing the proxy
witnessed or guaranteed by any trust company, bank or banker authorized by
Section 104 to certify to the holding of Bearer Securities. Such regulations may
provide that written instruments appointing proxies, regular on their face, may
be presumed valid and genuine without the proof specified in Section 104 or
other proof.

                                      -74-




<PAGE>   81



                           (b) The Trustee shall, by an instrument in writing
appoint a temporary chairman of the meeting, unless the meeting shall have been
called by the Company or by Holders of Securities provided in Section 1502(b),
in which case the Company or the Holders of Securities of the series calling the
meeting, as the case may be, shall in like manner appoint a temporary chairman.
A permanent chairman and a permanent secretary of the meeting shall be elected
by vote of the Persons entitled to vote a majority in principal amount of the
Outstanding Securities of such series represented at the meeting.

                           (c) At any meeting each Holder of a Security of such
series or proxy shall be entitled to one vote for each $1,000 principal amount
of the Outstanding Securities of such series held or represented by him;
provided, however, that no vote shall be cast or counted at any meeting in
respect of any Security challenged as not Outstanding and ruled by the chairman
of the meeting to be not Outstanding. The chairman of the meeting shall have no
right to vote, except as a Holder of a Security of such series or proxy.

                           (d) Any meeting of Holders of Securities of any
series duly called pursuant to Section 1502 at which a quorum is present may be
adjourned from time to time by Persons entitled to vote a majority in principal
amount of the Outstanding Securities of such series represented at the meeting,
and the meeting may be held as so adjourned without further notice.

                  SECTION 1506. Counting Votes and Recording Action of Meetings.
The vote upon any resolution submitted to any meeting of Holders of Securities
of any series shall be by written ballots on which shall be subscribed the
signatures of the Holders of Securities of such series or of their
representatives by proxy and the principal amounts and serial numbers of the
Outstanding Securities of such series held or represented by them. The permanent
chairman of the meeting shall appoint two inspectors of votes who shall count
all votes cast at the meeting for or against any resolution and who shall make
and file with the secretary of the meeting their verified written reports in
duplicate of all votes cast at the meeting. A record, at least in duplicate, of
the proceedings of each meeting of Holders of Securities of any Series shall be
prepared by the secretary of the meeting and there shall be attached to said
record the original reports of the inspectors of votes on any vote by ballot
taken thereat and affidavits by one or more persons having knowledge of the
fact, setting forth a copy of the notice of the meeting and showing that said
notice was given as provided in Section 1502 and, if applicable, Section 1504.
Each copy shall be signed and verified by the affidavits of the permanent
chairman and secretary of the meeting and one such copy shall be delivered to
the Company and another to the Trustee to be preserved by the Trustee, the
latter to have attached thereto the ballots voted at the meeting. Any record so
signed and verified shall be conclusive evidence of the matters therein stated.

                  SECTION 1507. Evidence of Action Taken by Holders. Any
request, demand, authorization, direction, notice, consent, waiver or other
action provided by this Indenture to be given or taken by a specified percentage
in principal amount of the Holders of any or all series may be embodied in and
evidenced by one or more instruments of substantially similar tenor signed by
such specified percentage of Holders in person or by agent duly appointed in
writing; and, except as herein otherwise expressly provided, such action shall
become effective when such instrument or instruments are delivered to the
Trustee. Proof and execution of any instrument or of a writing appointing any
such agent shall be sufficient for any purpose of this

                                      -75-




<PAGE>   82



Indenture and (subject to Article Six) conclusive in favor of the Trustee and
the Company, if made in the manner provided in this Article.

                                      -76-




<PAGE>   83



                  SECTION 1508. Proof of Execution of Instruments. Subject to
Article Six, the execution of any instrument by a Holder or his agent or proxy
may be proved in accordance with such reasonable rules and regulations as may be
prescribed by the Trustee or in such manner as shall be satisfactory to the
Trustee.

                                    * * * * *

                  This Indenture may be executed in any number of counterparts,
each of which so executed shall be deemed to be an original, but all such
counterparts shall together constitute but one and the same Indenture.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Indenture to be duly executed, and their respective corporate seals to be
hereunto affixed and attested, all as of the day and year first above written.


                                      LIBERTY PROPERTY LIMITED PARTNERSHIP

                                      By:    LIBERTY PROPERTY TRUST, as its sole
                                             general partner

                                             By: /s/ Willard G. Rouse III
                                                --------------------------------
                                                Title:

ATTEST

By: /s/ James J. Bowes
   -----------------------------
         Title:  Secretary

                                      THE FIRST NATIONAL BANK OF CHICAGO,
                                      as Trustee

                                             By: /s/ John R. Prendiville
                                                --------------------------------
                                                Title: Vice President

ATTEST

By: /s/ Mark J. Frye
   -----------------------
   Title:  Trust Officer


                                      -77-




<PAGE>   84



                                    EXHIBIT A

                             FORMS OF CERTIFICATION

                                   EXHIBIT A-1

               FORM OF CERTIFICATE TO BE GIVEN BY PERSON ENTITLED
                TO RECEIVE BEARER SECURITY OR TO OBTAIN INTEREST

                       PAYABLE PRIOR TO THE EXCHANGE DATE

                                   CERTIFICATE

[Insert title or sufficient description of Securities to be delivered]

         This is to certify that, as of the date hereof, and except as set forth
below, the above-captioned Securities held by you for our account (i) are owned
by person(s) that are not citizens or residents of the United States, domestic
companies, domestic corporations or any estate or trust the income of which is
subject to United States federal income taxation regardless of its source
("United States person(s)"), (ii) are owned by United States person(s) that are
(a) foreign branches of United States financial institutions (financial
institutions, as defined in United States Treasury Regulations Section
2.165-12(c)(1)(v) are herein referred to as "financial institutions") purchasing
for their own account or for resale, or (b) United States person(s) who acquired
the Securities through foreign branches of United States financial institutions
and who hold the Securities through such United States financial institutions on
the date hereof (and in either case (a) or (b), each such United States
financial institution hereby agrees, on its own behalf or through its agent,
that you may advise Liberty Property Limited Partnership or its agent that such
financial institution will comply with the requirements of Section 165(j)(3)(A),
(B) or (C) of the United States Internal Revenue Code of 1986, as amended, and
the regulations thereunder), or (iii) are owned by United States or foreign
financial institution(s) for purposes of resale during the restricted period (as
defined in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)),
and, in addition, if the owner is a United States or foreign financial
institution described in clause (iii) above (whether or not also described in
clause (i) or (ii)), this is to further certify that such financial institution
has not acquired the Securities for purposes of resale directly or indirectly to
a United States person or to a person within the United States or its
possessions.

         As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and "possessions" include
Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island and the
Northern Mariana Islands.

         We undertake to advise you promptly by tested telex on or prior to the
date on which you intend to submit your certification relating to the
above-captioned Securities held by you for our account in accordance with your
Operating Procedures if any applicable statement herein is not correct on such
date, and in the absence of any such notification it may be assumed that this
certification applies as of such date.





<PAGE>   85



         This certificate excepts and does not relate to [U.S.$] ________ of
such interest in the above-captioned Securities in respect of which we are not
able to certify and as to which we understand an exchange for an interest in a
Permanent Global Security or an exchange for and delivery of definitive
Securities (or, if relevant, collection of any interest) cannot be made until we
do so certify.

         We understand that this certificate may be required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated:  _________________, 19__

[To be dated no earlier than the 15th day prior to (i) the Exchange Date or (ii)
the relevant Interest Payment Date occurring prior to the Exchange Date, as
applicable]

                                          [Name of Person Making Certification]

-----------------------------------
                                          (Authorized Signatory)
                                           Name:
                                           Title:



                                       -2-




<PAGE>   86



                                   EXHIBIT A-2

                  FORM OF CERTIFICATE TO BE GIVEN BY EUROCLEAR
                 AND CEDEL S.A. IN CONNECTION WITH THE EXCHANGE
                OF A PORTION OF A TEMPORARY GLOBAL SECURITY OR TO


               OBTAIN INTEREST PAYABLE PRIOR TO THE EXCHANGE DATE


                                   CERTIFICATE

     [Insert title or sufficient description of Securities to be delivered]

         This is to certify that, based solely on written certifications that we
have received in writing, by tested telex or by electronic transmission from
each of the persons appearing in our records as persons entitled to a portion of
the principal amount set forth below (our "Member Organizations") substantially
in the form attached hereto, as of the date hereof, [U.S. $]
________________________________________________________ principal amount of the
above-captioned Securities (i) is owned by person(s) that are not citizens or
residents of the United States, domestic companies, domestic corporations or any
estate or trust the income of which is subject to United States Federal income
taxation regardless of its source ("United States person(s)"), (ii) is owned by
United States person(s) that are (a) foreign branches of United States financial
institutions (financial institutions, as defined in U.S. Treasury Regulations
Section 1.165-12(c)(1)(v) are herein referred to as "financial institutions")
purchasing for their own account or for resale, or (b) United States person(s)
who acquired the Securities through foreign branches of United States financial
institutions and who hold the Securities through such United States financial
institutions on the date hereof (and in either case (a) or (b), each such
financial institution has agreed, on its own behalf or through its agent, that
we may advise Liberty Property Limited Partnership or its agent that such
financial institution will comply with the requirements of Section 165(j)(3)(A),
(B) or (C) of the Internal Revenue Code of 1986, as amended, and the regulations
thereunder), or (iii) is owned by United States or foreign financial
institution(s) for purposes of resale during the restricted period (as defined
in United States Treasury Regulations Section 1.163-5(c)(2)(i)(D)(7)), and, to
the further effect, that financial institutions described in clause (iii) above
(whether or not also described in clause (i) or (ii)) have certified that they
have not acquired the Securities for purposes of resale directly or indirectly
to a United States person or to a person within the United States or its
possessions.

         As used herein, "United States" means the United States of America
(including the States and the District of Columbia); and its "possessions"
include Puerto Rico, the U.S. Virgin Islands, Guam, American Samoa, Wake Island
and the Northern Mariana Islands.

         We further certify that (i) we are not making available herewith for
exchange (or, if relevant, collection of any interest) any portion of the
temporary global Security representing the above captioned Securities excepted
in the above-referenced certificates of Member Organizations and (ii) as of the
date hereof we have not received any notification from any of our Member
Organizations to the effect that the statements made by such Member
Organizations with respect to any portion of the part submitted herewith for
exchange (or, if relevant, collection of any interest) are no longer true and
cannot be relied upon as of the date hereof.





<PAGE>   87



         We understand that this certification is required in connection with
certain tax legislation in the United States. If administrative or legal
proceedings are commenced or threatened in connection with which this
certificate is or would be relevant, we irrevocably authorize you to produce
this certificate or a copy thereof to any interested party in such proceedings.

Dated: ____________ 19__

[To be dated no earlier than the Exchange Date 
or the relevant Interest Payment Date occurring 
prior to the Exchange Date, as applicable]


                                  [Morgan Guaranty Trust Company of
                                  New York, Brussels Office,] as
                                  Operator of the Euroclear System [Cedel S.A.]

                                  By:
                                     -------------------------------------------



                                       -2-




<PAGE>   88




                                                                     Exhibit B

                                                                     ---------


                              OFFICERS' CERTIFICATE

               We, ________________________________, Chief Operating Officer,
and ____________________________________________________, Chief Financial
Officer, respectively, of Liberty Property Trust, the General Partner (the
"General Partner") of Liberty Property Limited Partnership (the "Company"),
pursuant to Section 301 of the Indenture dated as of _______, 19__ between the
Company and The First National Bank of Chicago, as Trustee (the "Indenture"),
hereby certify that a series of Securities with the following terms has been
established by a Board Resolution and has been denominated _____________Notes
due (the "Notes"), and we further certify as follows with respect to the Notes
(unless otherwise defined herein, capitalized terms shall have the meanings set
forth in the Indenture):

               1.   the title of the Notes shall be "__________ Notes due
                    _____." The Notes constitute a series of Securities as
                    defined in the Indenture. [The Notes shall be issuable as
                    Registered Securities in permanent global form only in
                    denominations of $1,000 or any integral multiple thereof;]

               2.   the maximum aggregate principal amount of Notes that may be
                    authenticated and delivered under the Indenture shall be
                    $_____________ (except for Notes authenticated and delivered
                    upon registration of transfer of, or in exchange for, or in
                    lieu of other Notes pursuant to Section 304, 305, 306, 906,
                    1107 or 1305 of the Indenture);

               3.   the principal amount of the Notes shall be payable on
                    ___________, ____, subject to the provisions of the
                    Indenture and the Notes;

               4.   interest will accrue from ________, 1997. The Notes will
                    bear interest at _____% per annum, payable in the manner and
                    on the dates set forth in the attached form of Notes;

               5.   the Corporate Trust Office of The First National Bank of
                    Chicago is appointed the principal paying agent, transfer
                    agent, and registrar for the Notes and for the purpose
                    mentioned in Section 1002 of the Indenture. The Notes may be
                    presented for payment at maturity or redemption at such
                    Corporate Trust Office, or at any other agency as may be
                    appointed by the Company from time to time in The City of
                    New York;

               6.   [the provisions of Sections 1402 and 1403 of the Indenture
                    with regard to defeasance and discharge and covenant
                    defeasance, respectively, shall be applicable to the Notes
                    without modification];





<PAGE>   89



               7.   [the Notes may be redeemed at any time at the option of the
                    Company, in such manner and upon the terms set forth in the
                    attached form of Notes and the Indenture;]

               8.   [the Notes will be represented by one or more Global Notes
                    as described under the caption "Description of the
                    Notes--Book Entry System" in the Company's Prospectus
                    Supplement dated _________, 1997 with respect to the
                    offering of the Notes (the "Prospectus Supplement")(except
                    that, in certain limited circumstances, the Company may
                    issue Notes in definitive form to owners of beneficial
                    interests in a Global Note, as described in the
                    above-referenced section of the Prospectus Supplement);]

               9.   the Notes shall have such other terms and conditions as are
                    set forth in the form of the Notes. The Notes shall be
                    subject to the provisions of the Indenture; and

               10.  the attached form of the Notes is in the form approved
                    pursuant to authority granted by the Board of Directors.

               This Certificate is delivered pursuant to the provisions of
Sections 201, 301, and 303 of the Indenture. The undersigned hereby certify as
follows:

                    (a)  we have read each of the Sections of the Indenture
                         referred to above;

                    (b)  we have examined the Indenture, the form of Notes and
                         such other documents, records, and instruments as we
                         have deemed necessary for purposes of giving this
                         certificate;

                    (c)  to the best of our knowledge, no Event of Default with
                         respect to the Notes has occurred and is continuing;

                    (d)  in our opinion, we have made such examination and
                         investigation as is necessary to enable us to express
                         an informed opinion as to whether the conditions
                         precedent to the issuance of the Notes have been
                         complied with; and


                                       -2-




<PAGE>   90



                    (e)       in our opinion, the conditions precedent to the
                              issuance of the Notes have been complied with.

Dated:  __________, 1997      Liberty Property Limited Partnership
                              by: Liberty Property Trust

                              By:
                                 ---------------------------------------------
                                           Chief Operating Officer


                              By:
                                 ---------------------------------------------
                                           Chief Financial Officer



                                       -3-




<PAGE>   91



                                 [FORM OF NOTE]

                   UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT AND
ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER
NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS
MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER
HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  UNLESS AND UNTIL THIS CERTIFICATE IS EXCHANGED IN WHOLE OR IN
PART FOR NOTES IN CERTIFICATED FORM, THIS CERTIFICATE MAY NOT BE TRANSFERRED
EXCEPT AS A WHOLE BY DTC TO A NOMINEE THEREOF OR BY A NOMINEE THEREOF TO DTC OR
ANOTHER NOMINEE OF DTC OR BY DTC OR ANY SUCH NOMINEE TO A SUCCESSOR OF DTC OR A
NOMINEE OF SUCH SUCCESSOR.

REGISTERED
REGISTERED

No.                                                                  Principal
Amount

CUSIP No.
$

                      LIBERTY PROPERTY LIMITED PARTNERSHIP

                          _________Notes due________
                                    

                  Liberty Property Limited Partnership, a Pennsylvania limited
partnership (the "Issuer," which term includes any successor under the Indenture
hereinafter referred to), for value received, hereby promises to pay to Cede &
Co. or registered assigns, upon presentation, the principal sum of ____________
Dollars ($______________ ) on __________, __________, and to pay interest
thereon from ___________, ___________ (or from the most recent Interest Payment
Date to which interest has been paid or duly provided for), semi-annually in
arrears on ____________ and ____________ of each year, commencing on _______,
199__, and at Maturity, at a rate of ______% interest of % per annum, until
payment of said principal sum has been made or duly provided for. Any
capitalized term not defined herein shall have the meaning assigned to it in
that certain Indenture by and among the Issuer and The First National Bank of
Chicago, a ____________________, dated as of ___________, 199___.






<PAGE>   92



                  The interest so payable and punctually paid or duly provided
for on an Interest Payment Date and at Maturity will be paid to the Holder in
whose name this Note (or one or more predecessor Notes) is registered at the
close of business on the Regular Record Date for such payment, which will be 15
calendar days (regardless of whether such day is a Business Day) next preceding
such Interest Payment Date or Maturity, as the case may be. Any interest not so
punctually paid or duly provided for shall forthwith cease to be payable to the
Holder on such Regular Record Date, and may either be paid to the Holder in
whose name this Note (or one or more predecessor Notes) is registered at the
close of business on a Special Record Date for the payment of such Defaulted
Interest to be fixed by the Trustee, notice whereof shall be given to Holders of
Notes of this series not less than ten (10) days prior to such Special Record
Date, or may be paid at any time in any other lawful manner not inconsistent
with the requirements of any securities exchange or which the Notes of this
series may be listed, and upon such notice as may be required by such exchange,
as more fully provided in the Indenture.

                  The principal and Make-Whole Amount, if any, of this Note
payable at Maturity will be paid against presentation and surrender of this Note
at the office or agency of the Issuer maintained for that purpose in The Borough
of Manhattan, The City of New York. The Issuer hereby initially designates the
Corporate Trust Office of the Trustee in The City of New York as the office to
be maintained by it where Notes may be presented for payment, registration of
transfer or exchange and where notices or demands to or upon the Issuer in
respect of the Notes or the Indenture may be served.

                  Interest payable on this Note will be computed on the basis of
a 360-day year consisting of twelve 30-day months. If any Interest Payment Date
or Maturity would otherwise be a day that is not a Business Day, the required
payment will be made on the next succeeding Business Day with the same force and
effect as if it were paid on the date such payment was due, and no interest will
accrue on the amount so payable for the period from and after such Interest
Payment Date or Maturity, as the case may be.

                  [Notes of this series may be redeemed at any time at the
option of the Issuer, in whole or in part, upon notice to the Holders of not
more than 60 nor less than 30 days prior to the Redemption Date, at a redemption
price equal to the sum of (i) the principal amount of the Notes being redeemed
plus accrued interest thereon to the Redemption Date and (ii) the Make-Whole
Amount, if any, with respect to such Notes.]

                  Payments of principal, Make-Whole Amounts, if any, and
interest in respect of this Note will be made by wire transfer of immediately
available funds, in such coin or currency as at the time of payment is legal
tender for the payment of public and private debts, so long as this Note is in
global form as described in Section 203 of the Indenture. If this Note is not in
global form, all such payments will be made by wire transfer of immediately
available funds if the Holder hereof at the applicable record date shall have
provided wire transfer instructions to the Trustee, received by the Trustee no
later than fifteen (15) days prior to the applicable payment date, and otherwise
payment shall be made in accordance with Section 307 of the Indenture. Such wire
transfer instructions shall remain in effect until revoked in a writing received
by the Trustee from the Holder hereof.


                                       -2-




<PAGE>   93



                  REFERENCE IS MADE TO THE FURTHER PROVISIONS OF THIS NOTE SET
FORTH ON THE REVERSE HEREOF. SUCH FURTHER PROVISIONS SHALL FOR ALL PURPOSES HAVE
THE SAME EFFECT AS THOUGH FULLY SET FORTH AT THIS

PLACE.

                  This Note shall not be entitled to the benefits of the
Indenture referred to on the reverse hereof or be valid or become obligatory for
any purpose until the certificate of authentication hereon shall have been
signed by the Trustee under such Indenture.

                  IN WITNESS WHEREOF, the Issuer has caused this instrument to
be signed manually or by facsimile by its duly authorized officers.

Dated:____________, 1997            LIBERTY PROPERTY LIMITED PARTNERSHIP, as
                                    Issuer

                                    By: LIBERTY PROPERTY TRUST, not individually
                                    but as General Partner

                                    By:
                                       -----------------------------------------


                                    By:
                                       -----------------------------------------
 



                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION



This is one of the Securities of the series designated herein referred to in the
within-mentioned Indenture.

Dated:_____________                 THE FIRST NATIONAL BANK OF CHICAGO,
                                    as Trustee


                                    By:
                                       -----------------------------------------
                                                 Authorized Signatory



                                       -3-




<PAGE>   94



                            [FORM OF REVERSE OF NOTE]

                      LIBERTY PROPERTY LIMITED PARTNERSHIP

                      _______ % ________ Notes due ________

                  This security is one of a duly authorized issue of debentures,
notes, bonds or other evidences of indebtedness of the Issuer (hereinafter
called the "Securities") of the series hereinafter specified, all issued or to
be issued under an Indenture dated as of , 1997 (the "Indenture"), between the
Issuer and The First National Bank of Chicago, as Trustee (herein called the
"Trustee," which term includes any successor trustee under the Indenture with
respect to the series of Securities of which this Note is a part), to which
Indenture and all indentures supplemental thereto reference is hereby made for a
description of the respective rights, limitations of rights, obligations, duties
and immunities thereunder of the Trustee, the Issuer and the Holders of the
Securities, and of the terms upon which the Securities are, and are to be,
authenticated and delivered. The Securities may be issued in one or more series,
which different series may be issued in various aggregate principal amounts, may
mature at different times, may bear interest (if any) at different rates, may be
subject to different redemption provisions (if any), and may otherwise vary
provided in the Indenture. This Security is one of a series designated on the
first page hereof, limited in aggregate principal amount to $ .

                  In case an Event of Default with respect to Securities of this
series shall have occurred and be continuing, the principal of, and premium or
Make-Whole Amount, if any, may be declared, and upon such declaration shall
become, due and payable, in the manner, with the effect, and subject to the
conditions provided in the Indenture.

                  As provided in and subject to the provisions of the Indenture,
the Holder of this Security shall not have the right to institute any proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder, unless (i) such Holder shall have previously
given written notice to the Trustee of a continuing Event of Default with
respect to the Outstanding Securities of this series, (ii) the Holders of not
less than 25% in principal amount of the Outstanding Securities of this series
shall have made written request to the Trustee to institute proceedings in
respect of such Event of Default in its own name as Trustee, (iii) such Holder
or Holders have offered reasonable indemnity to the Trustee against the costs,
expenses and liabilities to be incurred in compliance with such request, (iv)
the Trustee shall have failed to institute any such proceeding for 60 days after
its receipt of such notice, request and offer of indemnity and (v) the Trustee
shall not have received from the Holders of a majority in principal amount of
Outstanding Securities of this series a direction inconsistent with such
request.

                  The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Issuer and the rights of the Holders of the Securities of
each series to be affected under the Indenture at any time by the Issuer and the
Trustee with the consent of the Holders of not less than a majority in principal
amount of the Securities of each series at the time Outstanding affected
thereby. The Indenture also contains provisions permitting the Holders of at
least a majority in principal amount of the Securities of such series
Outstanding, on behalf of the Holders of all Securities of such series, to





<PAGE>   95



waive compliance by the Issuer with certain provisions of the Indenture and
certain past defaults under the Indenture and their consequences. Any such
consent or waiver by the Holders of this Security shall be conclusive and
binding upon such Holder and upon all future Holders of this Security and of any
Security issued upon the registration of transfer hereof or in exchange hereof
or in lieu hereof, whether or not notation of such consent or waiver is made
upon this Security.

                  No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligation of the Issuer,
which is absolute and unconditional, to pay the principal of, premium or
Make-Whole Amount, if any, and interest on this Security at the times, place and
rate, and in the coin or currency, herein prescribed.

                  As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Security is registrable in
the Security Register, upon surrender of this Security for registration of
transfer at the office or agency of the Issuer in any Place of Payment where the
principal of, premium or Make-Whole Amount, if any, on, and interest on this
Security are payable, duly endorsed by, or accompanied by a written instrument
of transfer in form satisfactory to the Issuer and the Security Registrar duly
executed by, the Holder hereof or his attorney duly authorized in writing, and
thereupon one or more new Securities of this series, of authorized denominations
and for the same aggregate principal amount, will be issued to the designated
transferee or transferees.

                  The Securities of this series are issuable only in registered
form without coupons in denominations of $1,000 and any integral multiple
thereof. As provided in the Indenture and subject to certain limitations therein
set forth, Securities of this series are exchangeable for a like aggregate
principal amount of Securities of this series of a different authorized
denomination, as requested by the Holder surrendering the same.

                  No service charge shall be made for any registration of
transfer or exchange of Securities of this series, but the Issuer may require
payment of a sum sufficient to cover any tax or other governmental charge
payable in connection therewith. [In no event shall the Issuer be required to
pay any Additional Amounts as contemplated by the Indenture.]

                  Prior to due presentment of this Security for registration of
transfer, the Issuer, the Trustee, and any authorized agent of the Issuer or the
Trustee may treat the Person in whose name this Security is registered as the
absolute owner of this Security (whether or not this Security shall be overdue
and notwithstanding any notation of ownership or other writing hereon), for the
purpose of receiving payment of, or on account of, the principal hereof and
premium, if any, and subject to the provisions on the face hereof, interest
hereon, and for all other purposes, and none of the Issuer, the Trustee or any
authorized agent of the Issuer or the Trustee shall be affected by any notice to
the contrary.

                  Notwithstanding anything contained herein or in the Indenture
to the contrary, no recourse under or upon any obligation, covenant or agreement
contained in the Indenture or in this Security, or because of any indebtedness
evidenced thereby (including without limitation, any obligation or indebtedness
relating to the principal of, or premium or Make-Whole Amount, if any, interest
or any other amounts due, or claimed to be due, on this Security), or for any
claim based thereon or otherwise in respect thereof, shall be had (i) against
the Trust or any other

                                       -2-




<PAGE>   96



partner in the Issuer, (ii) against any person which owns an interest, directly
or indirectly, in any partner in the Issuer or (iii) against any promoter, as
such, or against any past, present or future stockholder, partner, officer or
director, as such, of the Issuer or of any successor, either directly or through
the Issuer or any successor, under any rule of law, statute or constitutional
provisions or by the enforcement of any assessment or by any legal or equitable
proceeding or otherwise, all such liability being expressly waived and released
by the acceptance of this Security by the Holder thereof and as part of the
consideration for the issue of the Securities of this series. The Holder of this
Security acknowledges by acceptance of this Security that its sole remedies
under the Indenture for any Default by the Issuer in the payment of the
principal of, or any premium or Make-Whole Amount, if any, interest or any
amounts due, or claimed to be due, on this Security, or otherwise, are limited
to claims against the property of the Issuer as provided in Sections 111 and 503
of the Indenture.

                  THE INDENTURE AND EACH SECURITY SHALL BE DEEMED TO BE A
CONTRACT UNDER THE LAWS OF THE STATE OF NEW YORK, AND FOR ALL PURPOSES SHALL BE
CONSTRUED IN ACCORDANCE WITH THE LAWS OF SUCH STATE, EXCEPT AS MAY OTHERWISE BE
REQUIRED BY MANDATORY PROVISIONS OF LAW.

                  Pursuant to a recommendation promulgated by the Committee on
Uniform Security Identification Procedures, the Issuer has caused "CUSIP"
numbers to be printed on the Securities of this series as a convenience to the
Holders of such Securities. No representation is made as to the correctness or
accuracy of such CUSIP numbers as printed on the Securities, and reliance may be
placed only on the other identification numbers printed hereon.

                  Terms used herein that are defined in the Indenture shall have
the respective meanings assigned them in the Indenture.




                                       -3-




<PAGE>   97


                                  ABBREVIATIONS

                  The following abbreviations, when used in the inscription on
the face of this instrument, shall be construed as though they were written out
in full according to applicable laws or regulations:

<TABLE>
<CAPTION>
<S>                     <C>                                           <C>
TEN COMM          -     as tenants in common                           UNIF GIFT MIN  ACT -
TEN ENT           -     as tenants by the entireties                   ______Custodian _______________
JT TEN            -     as joint tenants with right                    (Cust)                  (Minor)
                        of survivorship and not as                     Under Uniform Gifts to
                        tenants in common                              Act _____________ State


</TABLE>

Additional abbreviations may also be used though not in the above list.

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

Social Security or taxpayer I.D.  or other identifying number of assignee.

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

                  FOR VALUE RECEIVED, the undersigned hereby sells, assigns and
transfers unto

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

--------------------------------------------------------------------------------
                         (name and address of assignee)

the within Note and all rights thereunder, hereby irrevocably constituting and
appointing _______________, attorney to transfer said Note on the books kept for
registration thereof, with full power of substitution in the premises.

Dated:
      ---------------
                                               -------------------------------




                                       -4-