Document:

EXHIBIT 4.1

                                                            EXECUTION COPY
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                         NORTHERN BORDER PARTNERS, L.P.

                                     Issuer

                NORTHERN BORDER INTERMEDIATE LIMITED PARTNERSHIP

                                   Guarantor

                         8 7/8% SENIOR NOTES DUE 2010

                    8 7/8% SENIOR NOTES DUE 2010, Series A

                                   INDENTURE

                            Dated as of June 2, 2000

                          BANK ONE TRUST COMPANY, N.A.

                                    Trustee

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<PAGE>

                            CROSS-REFERENCE TABLE(1)
<TABLE>
<CAPTION>

TRUST INDENTURE
  ACT SECTION                                                                                     INDENTURE SECTION

<S>                                                                                               <C>
310   (a)(1)...................................................................................................7.09
      (a)(2)...................................................................................................7.09
      (a)(3)...................................................................................................N.A.
      (a)(4)...................................................................................................N.A.
      (a)(5).............................................................................................7.08; 7.09
      (b)..........................................................................................7.08; 7.09; 7.10
      (c)......................................................................................................N.A.
311   (a)......................................................................................................7.13
      (b)......................................................................................................7.13
      (c)......................................................................................................N.A.
312   (a)......................................................................................................2.05
      (b).....................................................................................................10.03
      (c).....................................................................................................10.03
313   (a)......................................................................................................7.15
      (b)(2)...................................................................................................7.15
      (c)...............................................................................................7.15, 10.02
      (d)......................................................................................................7.15
314   (a)......................................................................................................4.03
      (a)(4)............................................................................................4.04; 10.04
      (c)(1)...................................................................................................N.A.
      (c)(2)...................................................................................................N.A.
      (c)(3)...................................................................................................N.A.
      (e).....................................................................................................10.05
      (f)......................................................................................................N.A.
315   (a)......................................................................................................7.01
      (b)......................................................................................................7.02
      (c)......................................................................................................7.01
      (d)......................................................................................................7.01
      (e)......................................................................................................6.14
316   (a)(last sentence).......................................................................................2.09
      (a)(1)(A)................................................................................................6.12
      (a)(1)(B)................................................................................................6.13
      (a)(2)...................................................................................................N.A.
      (b)......................................................................................................6.08
      (c)...............................................................................................2.12; 10.14
317   (a)(1)...................................................................................................6.04
      (a)(2)...................................................................................................6.04
      (b)......................................................................................................2.04
318   (a).....................................................................................................10.01
      (b).....................................................................................................10.01
      (c).....................................................................................................10.01
</TABLE>

N.A. means not applicable.

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         This Cross-Reference Table is not part of this Indenture.

                                      -i-
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                               TABLE OF CONTENTS
<TABLE>

<S>                                                                                                              <C>
                                                    ARTICLE I

                                      DEFINITIONS AND INCORPORATION BY REFERENCE
                                                        1

SECTION 1.01      Definitions.....................................................................................1
SECTION 1.02      Incorporation by Reference of Trust Indenture Act..............................................12
SECTION 1.03      Rules of Construction..........................................................................13

                                                    ARTICLE II

                                                     THE NOTES

SECTION 2.01      Form and Dating................................................................................13
SECTION 2.02      Execution and Authentication...................................................................14
SECTION 2.03      Registrar and Paying Agent.....................................................................14
SECTION 2.04      Paying Agent to Hold Money in Trust............................................................15
SECTION 2.05      Holder Lists...................................................................................15
SECTION 2.06      Transfer and Exchange..........................................................................15
SECTION 2.07      Replacement Notes..............................................................................27
SECTION 2.08      Outstanding Notes..............................................................................28
SECTION 2.09      Treasury Notes.................................................................................28
SECTION 2.10      Temporary Notes................................................................................28
SECTION 2.11      Cancellation...................................................................................29
SECTION 2.12      Defaulted Interest.............................................................................29
SECTION 2.13      CUSIP Numbers..................................................................................29

                                                    ARTICLE III

                                             REDEMPTION AND PREPAYMENT

SECTION 3.01      Notices to Trustee.............................................................................29
SECTION 3.02      Selection of Notes to be Redeemed..............................................................30
SECTION 3.03      Notice of Redemption...........................................................................30
SECTION 3.04      Effect of Notice of Redemption.................................................................31
SECTION 3.05      Deposit of Redemption Price....................................................................31
SECTION 3.06      Notes Redeemed in Part.........................................................................31
SECTION 3.07      Mandatory Redemption...........................................................................32
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<TABLE>

<S>                                                                                                              <C>
                                                    ARTICLE IV

                                                     COVENANTS

SECTION 4.01      Payment of Notes...............................................................................32
SECTION 4.02      Maintenance of Office or Agency................................................................32
SECTION 4.03      Reports........................................................................................33
SECTION 4.04      Statement by Officers as to Default............................................................33
SECTION 4.05      Existence......................................................................................34
SECTION 4.06      Limitations on Liens...........................................................................34
SECTION 4.07      Restriction of Sale-Leaseback Transactions.....................................................34
SECTION 4.08      Waiver of Certain Covenants....................................................................35
SECTION 4.09      Payments for Consent...........................................................................35
SECTION 4.10      Money for Note Payments to Be Held in Trust....................................................35
SECTION 4.11      Repurchase Upon a Rating Decline...............................................................36

                                                     ARTICLE V

                                                    SUCCESSORS

SECTION 5.01      Partnership and Guarantor May Consolidate, Etc., Only on Certain Terms.........................37
SECTION 5.02      Successor Substituted..........................................................................38

                                                    ARTICLE VI

                                               DEFAULTS AND REMEDIES

SECTION 6.01      Events of Default..............................................................................38
SECTION 6.02      Acceleration of Maturity; Rescission and Annulment.............................................39
SECTION 6.03      Collection of Indebtedness and Suits for Enforcement by Trustee................................40
SECTION 6.04      Trustee May File Proofs of Claim...............................................................41
SECTION 6.05      Trustee May Enforce Claims Without Possession of Notes.........................................41
SECTION 6.06      Application of Money Collected.................................................................42
SECTION 6.07      Limitation on Suits............................................................................42
SECTION 6.08      Unconditional Right of Holders to Receive Principal, Premium, Liquidated
                  Damages and Interest...........................................................................43
SECTION 6.09      Restoration of Rights and Remedies.............................................................43
SECTION 6.10      Rights and Remedies Cumulative.................................................................43
SECTION 6.11      Delay or Omission Not Waiver...................................................................43
SECTION 6.12      Control by Holders.............................................................................44
SECTION 6.13      Waiver of Past Defaults........................................................................44
SECTION 6.14      Undertaking for Costs..........................................................................44
SECTION 6.15      Waiver of Usury, Stay or Extension Laws........................................................45

                                                    ARTICLE VII

                                                      TRUSTEE

SECTION 7.01      Certain Duties and Responsibilities............................................................45
</TABLE>

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<TABLE>

<S>                                                                                                              <C>
SECTION 7.02      Notice of Defaults.............................................................................46
SECTION 7.03      Certain Rights of Trustee......................................................................46
SECTION 7.04      Not Responsible for Recitals or Issuance of Notes..............................................48
SECTION 7.05      May Hold Notes.................................................................................48
SECTION 7.06      Money Held in Trust............................................................................48
SECTION 7.07      Compensation and Reimbursement.................................................................48
SECTION 7.08      Disqualification; Conflicting Interests........................................................49
SECTION 7.09      Corporate Trustee Required; Eligibility........................................................49
SECTION 7.10      Resignation and Removal; Appointment of Successor..............................................49
SECTION 7.11      Acceptance of Appointment by Successor.........................................................51
SECTION 7.12      Merger, Conversion, Consolidation or Succession to Business....................................51
SECTION 7.13      Preferential Collection of Claims Against Partnership..........................................51
SECTION 7.14      Appointment of Authenticating Agent............................................................52
SECTION 7.15      Reports by Trustee to Holders of the Notes.....................................................53

                                                   ARTICLE VIII

                                     LEGAL DEFEASANCE AND COVENANT DEFEASANCE

SECTION 8.01      Option to Effect Legal Defeasance or Covenant Defeasance.......................................53
SECTION 8.02      Legal Defeasance and Discharge.................................................................54
SECTION 8.03      Covenant Defeasance............................................................................54
SECTION 8.04      Conditions to Legal or Covenant Defeasance.....................................................55
SECTION 8.05      Deposited Money and Government Securities to be Held in Trust;
                  Other Miscellaneous Provisions.................................................................56
SECTION 8.06      Repayment to Partnership.......................................................................57
SECTION 8.07      Reinstatement..................................................................................57

                                                    ARTICLE IX

                                         AMENDMENT, SUPPLEMENT AND WAIVER

SECTION 9.01      Without Consent of Holders of Notes............................................................57
SECTION 9.02      With Consent of Holders of Notes...............................................................58
SECTION 9.03      Compliance with Trust Indenture Act............................................................59
SECTION 9.04      Revocation and Effect of Consents..............................................................60
SECTION 9.05      Notation on or Exchange of Notes...............................................................60
SECTION 9.06      Trustee to Sign Amendments, Etc. ..............................................................60

                                                     ARTICLE X

                                                   MISCELLANEOUS

SECTION 10.01         Trust Indenture Act Controls...............................................................60
SECTION 10.02         Notices....................................................................................60
</TABLE>

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<TABLE>

<S>                                                                                                              <C>
SECTION 10.03         Communication by Holders of Notes with Other Holders of Notes..............................62
SECTION 10.04         Certificate and Opinion as to Conditions Precedent.........................................62
SECTION 10.05         Statements Required in Certificate or Opinion..............................................62
SECTION 10.06         Rules by Trustee and Agents................................................................62
SECTION 10.07         Non-Recourse to the General Partners; No Personal Liability of
                      Directors, Officers, Employees or Partners.................................................63
SECTION 10.08         Governing Law..............................................................................63
SECTION 10.09         No Adverse Interpretation of Other Agreements..............................................63
SECTION 10.10         Successors.................................................................................63
SECTION 10.11         Severability...............................................................................63
SECTION 10.12         Counterpart Originals......................................................................63
SECTION 10.13         Table of Contents, Headings, Etc. .........................................................64
SECTION 10.14         Acts of Holders; Record Dates..............................................................64

                                                    ARTICLE XI

                                           MEETINGS OF HOLDERS OF NOTES

SECTION 11.01         Purposes for Which Meetings May Be Called..................................................65
SECTION 11.02         Call, Notice and Place of Meetings.........................................................65
SECTION 11.03         Persons Entitled to Vote at Meetings.......................................................66
SECTION 11.04         Quorum; Action.............................................................................66
SECTION 11.05         Determination of Voting Rights; Conduct and Adjournment of
                      Meetings...................................................................................66
SECTION 11.06         Counting Votes and Recording Action of Meetings............................................67

                                                    ARTICLE XII

                                                GUARANTEE OF NOTES

SECTION 12.01         Unconditional Guarantee....................................................................68
SECTION 12.02         Limitation of Guarantor's Liability........................................................69
SECTION 12.03         Execution and Delivery of Guarantee........................................................70
SECTION 12.04         Addition of Guarantors.....................................................................70
SECTION 12.05         Release of Guarantee.......................................................................70

Exhibits

EXHIBIT A         Form of Note..................................................................................A-1
EXHIBIT B-1       Form of Certificate of Transfer.............................................................B-1-1
EXHIBIT B-2       Form of Certificate of Exchange.............................................................B-2-1
EXHIBIT C         Form of Certificate to be Delivered by Institutional Accredited Investors.....................C-1
EXHIBIT D         Registration Rights Agreement.................................................................D-1
</TABLE>

                                      -v-
<PAGE>

         INDENTURE dated as of June 2, 2000 between Northern Border Partners,
L.P., a Delaware limited partnership (the "Partnership"), Northern Border
Intermediate Limited Partnership, a Delaware limited partnership (the
"Guarantor") and Bank One Trust Company, N.A., as trustee (the "Trustee").

         The Partnership, the Guarantor and the Trustee agree as follows for
the benefit of each other and for the equal and ratable benefit of the Holders
of the 8 7/8% Senior Notes Due 2010 (the "Initial Notes") and the 8 7/8% Senior
Notes Due 2010, Series A, issued in the Exchange Offer (the "Exchange Notes"
and, together with the Initial Notes, the "Notes"):

                                   ARTICLE I

                   DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01 Definitions.

         "Acquired Debt" means, with respect to any specified Person, (i)
Indebtedness of any other Person existing at the time such other Person is
merged with or into or became a Subsidiary of such specified Person including,
without limitation, Indebtedness incurred in connection with, or in
contemplation of, such other Person merging with or into or becoming a
Subsidiary of such specified Person and (ii) Indebtedness secured by a Lien
encumbering any asset acquired by such specified Person.

         "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.

         "Agent" means any Registrar, Paying Agent or co-registrar.

         "Applicable Procedures" means, with respect to any transfer or
exchange of or for beneficial interests in any Global Note, the rules and
procedures of the Depositary that apply to such transfer or exchange.

         "Attributable Indebtedness" means with respect to a Sale-Leaseback
Transaction, as of the time of determination, the lesser of (i) the fair market
value of such assets (as determined in good faith by the Partnership Policy
Committee); (ii) the present value of the total Net Amount of Rent required to
be paid under the lease involved in such Sale-Leaseback Transaction during the
remaining term thereof (including any renewal term exercisable at the lessee's
option or period for which the lease has been extended), discounted at the rate
of interest set forth or implicit in the terms of such lease or, if not
practicable to determine such rate, the weighted average interest rate per
annum borne by the Notes, compounded semiannually; or (iii) if the obligation
with respect to the Sale-Leaseback Transaction constitutes an obligation that
is required to be classified and accounted

<PAGE>

for as a Capital Lease Obligation for financial reporting purposes in
accordance with GAAP, the amount equal to the capitalized amount of such
obligation required to be paid by the lessee as determined in accordance with
GAAP and included in the financial statements of the lessee.

         "Authenticating Agent" means any person authorized by the Trustee
pursuant to Section 7.14 hereof to authenticate the Notes.

         "Authorized Newspaper" means a newspaper, 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 the place in connection with which the term is
used or in the financial community of such place. Where successive publications
are required to be made in Authorized Newspapers, the successive publications
may be made in the same or different newspapers in the same city meeting the
foregoing requirements and in each case on any day that is a Business Day in
the place of publication.

         "Bankruptcy Code" means Title 11, U.S. Code, as amended, or any
similar federal or state law for the relief of debtors.

         "Business Day" means any day other than a Legal Holiday.

         "Capital Lease Obligation" means, at the time any determination
thereof is to be made, the amount of the liability in respect of a capital
lease that would at such time be required to be capitalized on a balance sheet
in accordance with GAAP.

         "Capital Interests" means any and all shares, interests,
participations, rights or other equivalents (however designated) of capital
stock, including, without limitation, with respect to partnerships, partnership
interests (whether general or limited) and any other interest or participation
that confers on a Person the right to receive a share of the profits and losses
of, or distributions of assets of, such partnership.

         "Corporate Trust Office of the Trustee" shall be at the address of the
Trustee specified in Section 11.02 hereof or such other address as to which the
Trustee may give notice to the Partnership.

         "Consolidated Net Tangible Assets" means, at any date of
determination, the aggregate amount of total assets included in the most recent
quarterly or annual balance sheet of the Partnership and its consolidated
Subsidiaries prepared in accordance with GAAP less applicable reserves
reflected in such balance sheet, after deducting the following amounts: (i) all
current liabilities reflected in such balance sheet; and (ii) all goodwill,
trade names, trademarks, patents, unamortized debt discount and expenses and
other like intangibles reflected in such balance sheet.

         "Currency Hedging Obligations" means, with respect to any Person, the
net payment Obligations of such Person under agreements or arrangements
designed to protect such Person against fluctuations in the currency exchange
rates incurred or entered into in the ordinary course of its business and not
for speculative purposes.

                                      -2-
<PAGE>

         "Custodian" means any receiver, trustee, assignee, liquidator,
sequester or similar official under the Bankruptcy Code.

         "Debt" means any obligation incurred, created or assumed by any Person
for the repayment of money borrowed, any purchase money obligation incurred,
created or assumed by such Person and any guarantee of any of the foregoing.

         "Default" means any event that is or with the passage of time or the
giving of notice (or both) would be an Event of Default.

         "Definitive Note" means a certificated Note registered in the name of
the Holder thereof and issued in accordance with Section 2.06 hereof, in the
form of Exhibit A-1 hereto except that such Note shall not bear the Global Note
Legend and shall not have the "Schedule of Exchanges of Interests in the Global
Note" attached thereto.

         "Depositary" means, with respect to the Notes issuable or issued in
whole or in part in global form, the Person specified in Section 2.03 hereof as
the Depositary with respect to the Notes, and any and all successors thereto
appointed as depositary hereunder and having become such pursuant to the
applicable provision of this Indenture.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended.

         "Exchange Notes" means notes registered under the Securities Act that
are issued under Section 2.06 hereof in exchange for the Notes pursuant to the
Exchange Offer.

         "Exchange Offer" has the meaning set forth in the Registration Rights
Agreement.

         "Exchange Offer Registration Statement" has the meaning set forth in
the Registration Rights Agreement.

         "Exempted Indebtedness" means Indebtedness of which the Partnership or
any of its Subsidiaries is an obligor or guarantor, or that has been assumed by
the Partnership or any of its Subsidiaries, which Indebtedness is secured by a
Lien (other than a Permitted Lien), or any Attributable Indebtedness of the
Partnership or any of its Subsidiaries, provided that the sum of the aggregate
principal amount of all such Indebtedness then outstanding (other than the
Notes) so secured by a Lien (other than a Permitted Lien) and the amount of all
the outstanding Attributable Indebtedness, in each case not otherwise permitted
by Section 4.06 or 4.07, does not at the time such Indebtedness or Attributable
Indebtedness is incurred exceed 10% of the Consolidated Net Tangible Assets of
the Partnership and its Subsidiaries.

         "Fair Market Value" means, with respect to consideration received or
to be received pursuant to any transaction by any Person, the fair market value
of such consideration as determined in good faith by the Partnership Policy
Committee.

                                      -3-
<PAGE>

         "Financial Hedging Obligations" means, with respect to any Person, the
net payment Obligations of such Person under (i) interest rate swap agreements,
interest rate cap agreements and interest rate collar agreements and (ii) other
agreements or arrangements designed to protect such Person against fluctuations
in interest rates or currency exchange rates incurred or entered into in the
ordinary course of its business and not for speculative purposes.

         "Funded Debt" means all Debt maturing one year or more from the date
of the incurrence, creation, assumption, or guarantee thereof, all Debt
directly or indirectly renewable or extendable, at the option of the debtor, by
its terms or by the terms of any instrument or agreement relating thereto, to a
date one year or more from the date of the incurrence, creation, assumption, or
guarantee thereof, and all Debt under a revolving credit or similar agreement
obligating the lender or lenders to extend credit over a period of one year or
more.

         "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants, the statements and pronouncements of
the Financial Accounting Standards Board and such other statements by such
other entities as have been approved by a significant segment of the accounting
profession, which are applicable at the date of determination.

         "General Partners" means Northern Plains Natural Gas Company, a
Delaware corporation, Pan Border Gas Company, a Delaware corporation, and
Northwest Border Pipeline Company, a Delaware corporation.

         "Global Note Legend" means the legend set forth in Section 2.06(g)(ii)
hereof, which is required to be placed on all Global Notes issued under this
Indenture.

         "Global Notes" means Global Notes, in the form of Exhibit A hereto,
issued in accordance with Section 2.01, 2.06(b)(iv), 2.06(d)(iv) or 2.06(f)
hereof.

         "Government Contract Lien" means any Lien in favor of the United
States of America or any State thereof, territory or possession thereof (or the
District of Columbia), or any department, agency, instrumentality or political
subdivision thereof (or the District of Columbia) to secure partial, progress,
advance or other payments pursuant to any contract or statute or to secure any
Indebtedness incurred for the purpose of financing all or any part of the
purchase price or the cost of constructing, developing or improving the
property subject to such Liens.

         "Government Securities" means direct obligations of, or obligations
guaranteed by, the United States of America for the payment of which guarantees
or obligations the full faith and credit of the United States is pledged.

         "guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof or pledging assets to secure), of
all or any part of any Indebtedness.

                                      -4-
<PAGE>

         "Guarantor" means Northern Border Intermediate Limited Partnership and
(i) each Subsidiary of the Partnership that becomes a guarantor of the Notes
pursuant to Section 12.04, (ii) each Subsidiary of the Partnership that
executes a supplemental indenture in which such Subsidiary agrees to be bound
by Article XII and (iii) any Subsidiary of the Partnership that is a successor
corporation of Northern Border Intermediate Limited Partnership or any
Subsidiary of the Partnership referred to in clauses (i) and (ii). The term
"Guarantor" shall not include any Subsidiary of the Partnership referred to in
clauses (i) through (iii) that shall have been released from its obligations
under Article XII pursuant to Section 12.05.

         "Hedging Obligations" means, with respect to any Person, collectively,
the Currency Hedging Obligations of such Person and the Financial Hedging
Obligations of such Person.

         "Holder" means a Person in whose name a Note is registered.

         "Holding Subsidiary" means a Guarantor and any Subsidiary of the
Partnership which succeeds such Guarantor and which owns or controls, directly
or indirectly, Capital Interests of any one or more other Subsidiaries of the
Partnership.

         "Indebtedness" means, with respect to any Person, at any date, any of
the following, without duplication: (i) any liability of such Person (A) for
borrowed money (whether or not the recourse of the lender is to the whole of
the assets of such Person or only to a portion thereof), (B) evidenced by a
note, bond, debenture or similar instrument, or (C) for the payment of money
relating to a Capital Lease Obligation or other obligation (whether issued or
assumed) relating to the deferred purchase price of property; (ii) all
conditional sale obligations and all obligations under any title retention
agreement (even if the rights and remedies of the seller under such agreement
in the event of default are limited to repossession or sale of such property);
(iii) all obligations for the reimbursement of any obligor on any letter of
credit, banker's acceptance or similar credit translation, other than as
entered into in the ordinary course of business; (iv) all indebtedness of
others secured by (or for which the holder of such indebtedness has an existing
right, contingent or otherwise, to be secured by) any Lien on any asset or
property (including, without limitation, leasehold interests and any other
tangible or intangible property) of such Person, whether or not such
indebtedness is assumed by such Person or is not otherwise such Person's legal
liability in full (except obligations of others secured by Liens, neither
assumed nor guaranteed by such Person nor on which it customarily pays
interest, existing upon real estate or rights in or relating to real estate
acquired by such Person for substation, metering station, gathering line,
transmission line, transportation line, distribution line or right of way
purposes, and any Liens reserved in leases for rent and for compliance with the
terms of the leases in the case of leasehold estates, to the extent that any
such Lien referred to in this clause (iv) does not materially impair the use of
the property), the amount of such indebtedness for the purposes of this
definition shall be limited to the lesser of the amount of such indebtedness
secured by such Lien or the fair market value of the assets or the property
securing such lien, (v) all indebtedness of others (including all interest and
dividends on any Indebtedness or preferred securities of any other Person) the
payment of which is guaranteed, directly or indirectly, by such Person or that
is otherwise its legal liability or which such Person has agreed to purchase or
repurchase or in respect of which such Person has agreed contingently to supply
or advance funds; and (vi) to the extent not otherwise included in this
definition, obligations in respect of Hedging Obligations. Indebtedness shall
not include (a) accounts payable arising in the

                                      -5-
<PAGE>
ordinary course of business and (b) any obligations in respect of prepayments
for natural gas or oil production or natural gas or oil imbalances.

         "Indenture" means this Indenture, as amended or supplemented from time
to time.

         "Indirect Participant" means a Person who holds a beneficial interest
in a Global Note through a Participant.

         "Initial Purchasers" means Banc of America Securities LLC, Banc One
Capital Markets, Inc. and SunTrust Equitable Securities.

         "Institutional Accredited Investor" means an institution that is an
"accredited investor" as defined in Rule 501(a)(1), (2), (3) or (7) of the
Securities Act.

         "Initial Notes" has the meaning set forth in the preamble to this
Indenture.

         "Interest Payment Date" means June 15 and December 15.

         "Investment Grade" means BBB- or above, in the case of S&P (or its
equivalent under any successor Rating Categories of S&P), Baa3 or above, in the
case of Moody's (or its equivalent under any successor Rating Categories of
Moody's), and the equivalent in respect of the Rating Categories of any Rating
Agencies substituted for S&P or Moody's.

         "Issue Date" means the date on which the Notes are first authenticated
and delivered under the Indenture.

         "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of New York or at a place of payment are authorized by
law, regulation or executive order to remain closed. If a payment date is a
Legal Holiday at a place of payment, payment may be made at that place on the
next succeeding day that is not a Legal Holiday, and no interest shall accrue
for the intervening period.

         "Letter of Transmittal" means the letter of transmittal to be prepared
by the Partnership and sent to all Holders of the Notes for use by such Holders
in connection with the Exchange Offer.

         "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset,
whether or not filed, recorded or otherwise perfected under applicable law
(including any conditional sale or other title retention agreement, any lease
in the nature thereof, any option or other agreement to sell or give a security
interest in any asset and any filing of or agreement to give any financing
statement under the Uniform Commercial Code (or equivalent statutes) of any
jurisdiction).

         "Liquidated Damages" means all additional interest then owing pursuant
to Section 5 of the Registration Rights Agreement.

         "Moody's" means Moody's Investors Service, Inc. and its successors.

                                      -6-
<PAGE>

         "Net Amount of Rent" as to any lease for any period means the
aggregate amount of rent payable by the lessee with respect to such period
after excluding amounts, whether or not designated as rent or additional rent,
required to be paid on account of or contingent upon maintenance and repairs,
insurance, taxes, assessments, water rates and similar charges. In the case of
any lease that is terminable by the lessee upon the payment of a penalty, such
net amount shall be the lesser of (i) the net amount determined assuming
termination of the lease on the first date such lease may be terminated (in
which case such net amount shall also include the amount of such penalty, but
no rent shall be considered as payable under such lease subsequent to the first
date upon which it may be so terminated) or (ii) such net amount assuming no
such termination.

         "Note Custodian" means the Trustee, as custodian with respect to the
Notes in global form, or any successor entity thereto.

         "Notes" has the meaning assigned to it in the preamble to this
Indenture.

         "Obligations" means any principal, premium (if any), Liquidated
Damages (if any), interest (including interest accruing on or after the filing
of any petition in bankruptcy or for reorganization relating to the Partnership
or its Subsidiaries whether or not a claim for post-filing interest is allowed
in such proceeding), penalties, fees, charges, expenses, indemnifications,
reimbursement obligations, damages (including Liquidated Damages, if any,),
guarantees and other liabilities or amounts payable under the documentation
governing any Indebtedness or in respect thereof.

         "Offering" means the offering of the Initial Notes by the Partnership.

         "Offering Memorandum" means the Offering Memorandum of the Partnership
dated May 26, 2000 with respect to the Offering.

         "Officer" means, with respect to any Person, the Chairman of the
Board, the Chief Executive Officer, the President, the Chief Operating Officer,
the Chief Financial and Accounting Officer, the Treasurer, any Assistant
Treasurer, the Controller, the Secretary or any Vice-President of such Person;
provided, however, that an Officer with respect to a partnership shall mean an
Officer of its general partner or general partners or, as applicable in the
case of the Partnership, a member of its Partnership Policy Committee or
equivalent governing body.

         "Officers' Certificate" means a certificate signed on behalf of the
Partnership by two Officers of the Partnership, one of whom must be the
principal executive officer, the principal financial officer, the treasurer or
the principal accounting officer of the Partnership, that meets the
requirements of Section 10.05 hereof.

         "Opinion of Counsel" means an opinion from legal counsel who is
reasonably acceptable to the Trustee, that meets the requirements of Section
10.05 hereof. The counsel may be an employee of or counsel to the Partnership
or the Guarantor.

         "Participant" means, with respect to DTC, a Person who has an account
with DTC.

                                      -7-

<PAGE>

         "Participating Broker-Dealer" has the meaning set forth in the
Registration Rights Agreement.

         "Partnership" means the Person named as the "Partnership" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Partnership" shall mean such successor Person.

         "Partnership Policy Committee" means the committee that oversees
management of the Partnership.

         "Partnership Request" or "Partnership Order" means a written request
or order signed in the name of the Partnership by a member of the Partnership
Policy Committee or the chief executive officer or the chief financial and
accounting officer of the Partnership, and delivered to the Trustee, or if the
Partnership shall change its form of entity to other than a limited
partnership, by Persons or officers, members, agents and the like positions
comparable to those of the foregoing nature, as applicable.

         "Paying Agent" means any Person authorized by the Partnership to pay
the principal of or any premium, interest or Liquidated Damages on the Notes on
behalf of the Partnership.

         "Permitted Liens" means, with respect to any Person:

         (i)      with respect to the Notes issued under this Indenture, Liens
                  existing on or provided for under the terms of agreements
                  existing on the date the Notes are issued;

         (ii)     Liens on property, shares of stock, Indebtedness or other
                  assets of any Person (which is not a Subsidiary) existing at
                  the time such Person is merged into or consolidated with or
                  into the Partnership or any of its Subsidiaries; provided
                  that such Liens are not incurred in anticipation of such
                  Person becoming a Subsidiary; or Liens existing at the time
                  of a sale, lease or other disposition of properties of a
                  Person as an entirety or substantially as an entirety to the
                  Partnership or any of its Subsidiaries;

         (iii)    Liens on property, shares of stock, Indebtedness or other
                  assets existing at the time of acquisition thereof by the
                  Partnership or any of its Subsidiaries, or Liens to secure
                  all or part of the purchase price thereof;

         (iv)     Liens on property, shares of stock, indebtedness for borrowed
                  money, or other assets to secure any Indebtedness incurred
                  prior to, at the time of or within 24 months after, the
                  latest of the acquisition thereof or, in the case of
                  property, the completion of construction, the completion of
                  development or improvements or the commencement of commercial
                  operation of such property for the purpose of financing all
                  or part of the purchase price thereof, such construction or
                  the making of such developments or improvements;

         (v)      Liens securing Indebtedness owed to the Partnership or any of
                  its Subsidiaries;

                                      -8-
<PAGE>

         (vi)     Liens on property to secure all or part of the cost of
                  acquiring, constructing, altering, improving, developing or
                  repairing any property or asset, or improvements used in
                  connection with that property or Liens incurred by the
                  Partnership or any of its Subsidiaries to provide funds for
                  any such activities;

         (vii)    Government Contract Liens;

         (viii)   Liens on any property to secure bonds for the construction,
                  installation or financing of pollution control or abatement
                  facilities or other forms of industrial revenue bond
                  financing, or indebtedness issued or guaranteed by the United
                  States, any state or any department, agency or
                  instrumentality thereof;

         (ix)     Liens contemplated by Section 7.07 hereof;

         (x)      Liens deemed to exist by reason of negative pledges in
                  respect of Indebtedness; and

         (xi)     Liens to secure any refinancing, refunding, extension,
                  renewal or replacement (or successive refinancings,
                  refundings, extensions, renewals or replacements), as a whole
                  or in part, of any Indebtedness secured by any Lien referred
                  to in clauses (i) through (x) above; provided, however, that
                  such Lien(s) shall not extend to any property of the
                  Partnership or any of its Subsidiaries, as the case may be,
                  other than the property specified in clauses (i) through (x)
                  above to which the Lien securing such refinanced, refunded,
                  extended, renewed or replaced Indebtedness applied and
                  improvements thereto or proceeds therefrom.

         "Person" means any individual, corporation, partnership, joint
venture, association, joint stock company, trust, limited liability company,
unincorporated organization, government or any agency or political subdivision
thereof or any other entity.

         "Place of Payment", when used with respect to the Notes, means, unless
otherwise specifically provided in notice given pursuant to Section 4.02
hereof, the office or agency of the Partnership in the City of New York and
such other place or places where, the principal of and any premium, interest
and Liquidated Damages, if any, on the Notes are payable.

         "Private Placement Legend" means the legend set forth in Section
2.06(g)(i) hereof to be placed on all Notes issued under this Indenture except
where otherwise permitted by the provisions of this Indenture.

         "Proceeding" means any voluntary or involuntary insolvency,
bankruptcy, receivership, custodianship, liquidation, dissolution,
reorganization, assignment for the benefit of creditors, appointment of a
custodian, receiver, trustee or other officer with similar powers or any other
proceeding for the liquidation, dissolution or other winding up of a Person
(including, without limitation, any such proceeding under Bankruptcy Code).

         "Property" means any right or interest of the Partnership or any of
its Subsidiaries in and to property of any kind whatsoever, whether real,
personal or mixed and whether tangible or intangible.

                                      -9-
<PAGE>

         "Purchase Agreement" means the Purchase Agreement dated May 26, 2000
among the Partnership and the Initial Purchasers (as defined therein.)

         "QIB" means a "qualified institutional buyer" as defined in Rule 144A
of the rules and regulations promulgated by the SEC under the Securities Act.

         "Rating Agencies" means (a) S&P and Moody's or (b) if S&P or Moody's
or both of them are not making ratings of the notes publicly available, a
nationally recognized U.S. rating agency or agencies, as the case may be,
selected by the Partnership, which will be substituted for S&P or Moody's or
both, as the case may be.

         "Rating Categories" means:

         (a)      with respect to S&P, any of the following categories (any of
                  which may include a "+" or "-"): AAA, AA, A, BBB, BB, B, CCC,
                  CC, C and D (or equivalent successor categories);

         (b)      with respect to Moody's, any of the following categories (any
                  of which may include a "1," "2" or "3"): Aaa, Aa, A, Baa, Ba,
                  B, Caa, Ca, C and D (or equivalent successor categories); and

         (c)      the equivalent of any such categories of S&P or Moody's used
                  by another Rating Agency, if applicable.

         "Rating Decline" means the assignment by any Rating Agency of a rating
to the Notes that is below Investment Grade.

         "Redemption Date" means the date on which the Notes are to be redeemed
pursuant to Article III, hereof.

         "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of June 2, 2000 by and among the Partnership and the other
parties named on the signature pages thereof, attached hereto as Exhibit D, as
such agreement may be amended, modified or supplemented from time to time.

         "Responsible Officer," when used with respect to the Trustee, means
any officer, including, without limitation, any vice president, assistant vice
president, assistant treasurer or secretary within the Corporate Trust
Administration of the Trustee (or any successor group of the Trustee) or any
other officer of the Trustee customarily performing 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 or employee to whom
such matter is referred because of his knowledge of and familiarity with the
particular subject.

         "Restricted Definitive Note" means a Definitive Note bearing the
Private Placement Legend.

         "Restricted Global Note" means a Global Note bearing the Private
Placement Legend.

                                     -10-
<PAGE>

         "Rule 144" means Rule 144 promulgated under the Securities Act.

         "Rule 144A" means Rule 144A promulgated under the Securities Act.

         "Rule 144A Global Note" means the Global Note in the form of Exhibit A
hereto bearing the Global Note Legend and the Private Placement Legend and
deposited with and registered in the name of the Depositary or its nominee that
will be issued in a denomination equal to the outstanding principal amount of
the Notes sold in reliance on Rule 144A.

         "S&P" means Standard & Poor's Ratings Services, a division of The
McGraw-Hill Companies, Inc., and its successors.

         "Sale-Leaseback Transaction" means any arrangement with any Person
pursuant to which the Partnership or any of its Subsidiaries leases any
Property that has been or is to be sold or transferred by the Partnership or
its Subsidiaries to such Person, other than (i) any such transaction involving
a lease for a term of not more than two years, (ii) any such transaction
between the Partnership and any of its Subsidiaries or between any Subsidiaries
of the Partnership, and (iii) any such transaction executed by the time of, or
within 12 months after the latest of, the acquisition, the completion of
construction, development or improvement, or the commencement of commercial
operation of the Partnership's assets subject to such leasing transaction.

         "SEC" means the Securities and Exchange Commission.

         "Securities Act" means the Securities Act of 1933, as amended.

         "Shelf Registration Statement" has the meaning set forth in the
Registration Rights Agreement.

         "Significant Subsidiary" means any Subsidiary that would be a
"significant subsidiary" as defined in Article 1, Rule 1-02 of Regulation S-X,
promulgated pursuant to the Securities Act, as such Regulation is in effect on
the date of this Indenture.

         "Stated Maturity" means, with respect to any installment of interest or
principal on any series of Indebtedness, the date on which such payment of
interest or principal was scheduled to be paid in the original documentation
governing such Indebtedness, and shall not include any contingent obligations
to repay, redeem or repurchase any such interest or principal prior to the
date originally scheduled for the payment thereof.

         "Subordinated Indebtedness" means any Indebtedness of the Partnership
which is subordinated in right of payment to the Notes.

         "Subsidiary" of any Person means (i) any Person of which at the time
of such determination more than 50% of the total voting power of Capital
Interests entitled (without regard to the occurrence of any contingency to vote
in the election of directors, managers or trustees thereof (or other Persons
constituting an equivalent governing body)) is owned or controlled, directly or
indirectly, by such Person or one or more of the Subsidiaries of such Person
(or a combination

                                     -11-
<PAGE>

thereof), (ii) in the case of a partnership, any Person of which at the time of
such determination more than 50% of the partners' Capital Interests
(considering all partners' Capital Interests as a single class) is owned or
controlled, directly or indirectly, by such Person or one or more Subsidiaries
of such Person, or (iii) any other Person in which such Person or one or more
of the Subsidiaries of that Person (or a combination thereof) has the power to
control by contract or otherwise the board of directors, managers or trustees
thereof or equivalent governing body or otherwise controls such entity. Unless
otherwise provided, references in this Indenture to a Subsidiary are to a
Subsidiary of the Partnership.

         "TIA" or "Trust Indenture Act" means the Trust Indenture Act of 1939
as in effect on the date on which this Indenture is qualified under the TIA.

         "Trustee" means the party named as such above until a successor
replaces it in accordance with the applicable provisions of this Indenture and
thereafter means the successor serving hereunder.

         "Unrestricted Definitive Note" means one or more Definitive Notes that
do not bear and are not required to bear the Private Placement Legend.

         "Unrestricted Global Note" means a permanent global Note in the form
of Exhibit A-1 attached hereto that bears the Global Note Legend and that has
the "Schedule of Exchanges of Interests in the Global Note" attached thereto,
and that is deposited with or on behalf of and registered in the name of the
Depositary, representing a series of Notes that do not and are not required to
bear the Private Placement Legend.

         Other Definitions

<TABLE>
<CAPTION>

                                                                                     DEFINED IN
                                      TERM                                             SECTION
--------------------------------------------------------------------------------     ----------
<S>                                                                                  <C>
"Covenant Defeasance"...........................................................         8.03
"DTC"...........................................................................         2.03
"Event of Default"..............................................................         6.01
"Legal Defeasance"..............................................................         8.02
"Paying Agent"..................................................................         2.03
"Registrar".....................................................................         2.03
</TABLE>

SECTION 1.02 Incorporation by Reference of Trust Indenture Act.

         Whenever this Indenture refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

         The following TIA terms used in this Indenture have the following
meanings:

         "indenture securities" means the Notes;

         "indenture security holder" means a Holder of a Note;

                                     -12-
<PAGE>

         "indenture to be qualified" means this Indenture;

         "indenture trustee" or "institutional trustee" means the Trustee; and

         "obligor" on the Notes means the Partnership and any successor obligor
upon the Notes.

         All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by SEC rule under the
TIA have the meanings so assigned to them.

SECTION 1.03 Rules of Construction.

         Unless the context otherwise requires:

         (1) a term has the meaning assigned to it;

         (2) an accounting term not otherwise defined has the meaning assigned
to it in accordance with GAAP;

         (3) "or" is not exclusive;

         (4) words in the singular include the plural, and in the plural
include the singular; provisions apply to successive events and transactions;
and

         (5) references to sections of or rules under the Securities Act shall
be deemed to include substitute, replacement of successor sections or rules
adopted by the SEC from time to time.

                                   ARTICLE II

                                   THE NOTES

SECTION 2.01 Form and Dating.

         The Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A hereto. The Notes may have notations,
legends or endorsements required by law, stock exchange rule or usage. Each
Note shall be dated the date of its authentication. The Notes shall be in
denominations of $1,000 and integral multiples thereof.

         The terms and provisions contained in the Notes shall constitute, and
are hereby expressly made, a part of this Indenture and the Partnership and the
Trustee, by their execution and delivery of this Indenture, expressly agree to
such terms and provisions and to be bound thereby. However, to the extent any
provision of any Note conflicts with the express provisions of this Indenture,
the provisions of this Indenture shall govern and be controlling. Notes issued
in global form shall be substantially in the form of Exhibit A attached hereto
(including the Global Note Legend and the "Schedule of Exchanges of Interests
in the Global Note" attached thereto). Notes issued in definitive form shall be
substantially in the form of Exhibit A attached hereto (but without the Global
Note

                                     -13-
<PAGE>

Legend and without the "Schedule of Exchanges of Interests in the Global Note"
attached thereto). Each Global Note shall represent such of the outstanding
Notes as shall be specified therein and each shall provide that it shall
represent the aggregate principal amount of outstanding Notes from time to time
endorsed thereon and that the aggregate principal amount of outstanding Notes
represented thereby may from time to time be reduced or increased, as
appropriate, to reflect exchanges and redemptions. Any endorsement of a Global
Note to reflect the amount of any increase or decrease in the aggregate
principal amount of outstanding Notes represented thereby shall be made by the
Trustee, the Depositary or the Note Custodian, at the direction of the Trustee,
in accordance with instructions given by the Holder thereof as required by
Section 2.06 hereof.

SECTION 2.02 Execution and Authentication.

         One Officer shall sign the Notes for the Partnership by manual or
facsimile signature.

         If an Officer whose signature is on a Note no longer holds that office
at the time a Note is authenticated, the Note shall nevertheless be valid. A
Note shall not be valid until authenticated by the manual signature of the
Trustee. The signature shall be conclusive evidence that the Note has been
authenticated under this Indenture.

         The Trustee shall, upon a written order of the Partnership signed by
one Officer, authenticate Notes for original issue on the Issue Date up to
$150,000,000 aggregate principal amount of the Notes. This series of Notes may
be reopened for issuances of additional Notes without the consent of Holders,
provided that no additional Notes may be issued if an Event of Default has
occurred and is continuing with respect to the Notes. The Trustee may appoint
an Authenticating Agent acceptable to the Partnership to authenticate Notes. An
Authenticating Agent may authenticate Notes whenever the Trustee may do so.
Each reference in this Indenture to authentication by the Trustee includes
authentication by such agent. An Authenticating Agent has the same rights as an
Agent to deal with (i) Holders or (ii) an Affiliate of the Partnership.

SECTION 2.03 Registrar and Paying Agent.

         The Partnership shall maintain an office or agency within the City and
State of New York where Notes may be presented for registration of transfer or
for exchange ("Registrar") and an office or agency where Notes may be presented
for payment ("Paying Agent"). The Registrar shall keep a register of the Notes
and of their transfer and exchange. The Partnership may appoint one or more
co-registrars and one or more additional paying agents. The term "Registrar"
includes any co-registrar and the term "Paying Agent" includes any additional
paying agent. The Partnership may change any Paying Agent or Registrar without
notice to any Holder. The Partnership shall promptly notify the Trustee in
writing of the name and address of any Agent not a party to this Indenture. If
the Partnership fails to appoint or maintain another entity as Registrar or
Paying Agent, the Trustee shall act as such. The Partnership or any of its
Subsidiaries may act as Paying Agent or Registrar.

         The Partnership initially appoints The Depository Trust Company
("DTC") to act as Depositary with respect to the Global Notes. The Partnership
initially appoints the Trustee to act as the Registrar and Paying Agent and to
act as Note Custodian with respect to the Global Notes.

                                     -14-
<PAGE>

SECTION 2.04 Paying Agent to Hold Money in Trust.

         The Partnership shall require each Paying Agent other than the Trustee
to agree in writing that the Paying Agent will hold in trust for the benefit of
Holders or the Trustee all money held by the Paying Agent for the payment of
principal of, premium, if any, or Liquidated Damages, if any, or interest on
the Notes, and will notify the Trustee of any default by the Partnership in
making any such payment. While any such default continues, the Trustee may
require a Paying Agent to pay all money held by it to the Trustee. The
Partnership at any time may require a Paying Agent to pay all money held by it
to the Trustee. Upon payment over to the Trustee, the Paying Agent (if other
than the Partnership or a Subsidiary) shall have no further liability for the
money. If the Partnership or an Affiliate of the Partnership acts as Paying
Agent, it shall segregate and hold in a separate trust fund for the benefit of
the Holders all money held by it as Paying Agent. Upon any bankruptcy or
reorganization proceedings relating to the Partnership, the Trustee shall serve
as Paying Agent for the Notes.

SECTION 2.05 Holder Lists.

         The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
all Holders and shall otherwise comply with TIA Section 312(a). If the Trustee
is not the Registrar, the Partnership shall provide to a Responsible Officer of
the Trustee at least seven Business Days before each Interest Payment Date and
at such other times as the Trustee may request in writing, a list in such form
and as of such date as the Trustee may reasonably require of the names and
addresses of the Holders of Notes and the Partnership shall otherwise comply
with TIA Section 312(a).

SECTION 2.06 Transfer and Exchange.

                  (a) Transfer and Exchange of Global Notes. A Global Note may
not be transferred as a whole except by the Depositary to a nominee of the
Depositary, by a nominee of the Depositary to the Depositary or to another
nominee of the Depositary, or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary. All Global
Notes will be exchanged by the Partnership for Definitive Notes if (i) the
Partnership delivers to the Trustee notice from the Depositary that it is
unwilling or unable to continue to act as Depositary for the Global Notes or
that it is no longer a clearing agency registered under the Exchange Act and,
in either case, a successor Depositary is not appointed by the Partnership
within 90 days after the date of such notice from the Depositary or (ii) the
Partnership in its sole discretion notifies the Trustee in writing that it
elects to cause issuance of the Notes in certificated form. If an Event of
Default occurs and is continuing, the Partnership shall, at the request of the
Holder thereof, exchange all or part of a Global Note for one or more
Definitive Notes in denominations of $1000 or multiples thereof. Upon the
occurrence of either of the preceding events in (i) or (ii) above, Definitive
Notes shall be issued in such names as the Depositary shall instruct the
Trustee. Global Notes also may be exchanged or replaced, in whole or in part,
as provided in Sections 2.07 and 2.11 hereof. Every Note authenticated and
delivered in exchange for, or in lieu of, a Global Note or any portion thereof,
pursuant to Section 2.07 or 2.11 hereof, shall be authenticated and delivered
in the form of, and shall be, a Global Note. A Global Note may not be exchanged
for another Note other than as provided in this Section 2.06(a), however,
beneficial interests in a Global Note may be transferred and

                                     -15-
<PAGE>

exchanged as provided in Section 2.06(b), (c) or (f) hereof. Notwithstanding
anything in this Section 2.06 to the contrary, no Notes shall be transferred or
exchanged for a period of 15 days prior to a selection of Notes to be redeemed
pursuant to Article 3.

                  (b) Transfer and Exchange of Beneficial Interests in the
Global Notes. The transfer and exchange of beneficial interests in the Global
Notes shall be effected through the Depositary, in accordance with the
provisions of this Indenture and the Applicable Procedures. Beneficial
interests in the Restricted Global Notes shall be subject to restrictions on
transfer comparable to those set forth herein to the extent required by the
Securities Act. Transfers of beneficial interests in the Global Notes also
shall require compliance with either subparagraph (i) or (ii) below, as
applicable, as well as one or more of the other following subparagraphs as
applicable:

                           (i) Transfer of Beneficial Interests in the Same
         Global Note. Beneficial interests in any Restricted Global Note may be
         transferred to Persons who take delivery thereof in the form of a
         beneficial interest in the same Restricted Global Note in accordance
         with the transfer restrictions set forth in the Private Placement
         Legend. Beneficial interests in any Unrestricted Global Note may be
         transferred only to Persons who take delivery thereof in the form of a
         beneficial interest in an Unrestricted Global Note. No written orders
         or instructions shall be required to be delivered to the Registrar to
         effect the transfers described in this Section 2.06(b)(i).

                           (ii) All Other Transfers and Exchanges of Beneficial
         Interests in Global Notes. In connection with all transfers and
         exchanges of beneficial interests (other than a transfer of a
         beneficial interest in a Global Note to a Person who takes delivery
         thereof in the form of a beneficial interest in the same Global Note),
         the transferor of such beneficial interest must deliver to the
         Registrar (A) (1) a written order from a Participant or an Indirect
         Participant given to the Depositary in accordance with the Applicable
         Procedures directing the Depositary to credit or cause to be credited
         a beneficial interest in another Global Note in an amount equal to the
         beneficial interest to be transferred or exchanged and (2)
         instructions given in accordance with the Applicable Procedures
         containing information regarding the Participant account to be
         credited with such increase or (B) (1) a written order from a
         Participant or an Indirect Participant given to the Depositary in
         accordance with the Applicable Procedures directing the Depositary to
         cause to be issued a Definitive Note in an amount equal to the
         beneficial interest to be transferred or exchanged and (2)
         instructions given by the Depositary to the Registrar containing
         information regarding the Person in whose name such Definitive Note
         shall be registered to effect the transfer or exchange referred to in
         (1) above. Upon an Exchange Offer by the Partnership in accordance
         with Section 2.06(f) hereof, the requirements of this Section
         2.06(b)(ii) shall be deemed to have been satisfied upon receipt by the
         Registrar of the instructions contained in the Letter of Transmittal
         delivered by the Holder of such beneficial interests in the Restricted
         Global Notes. Upon satisfaction of all of the requirements for
         transfer or exchange of beneficial interests in Global Notes contained
         in this Indenture, the Notes and otherwise applicable under the
         Securities Act, the Trustee shall adjust the principal amount of the
         relevant Global Note(s) pursuant to Section 2.06(h) hereof.

                                     -16-
<PAGE>

                           (iii) Transfer of Beneficial Interests to Another
         Restricted Global Note. A beneficial interest in any Restricted Global
         Note may be transferred to a Person who takes delivery thereof in the
         form of a beneficial interest in another Restricted Global Note if the
         transfer complies with the requirements of clause (ii) above and the
         transferor delivers to the Registrar a certificate in the form of
         Exhibit B hereto, including the certifications in Item (1) thereof.

                           (iv) Transfer and Exchange of Beneficial Interests in
         a Restricted Global Note for Beneficial Interests in the Unrestricted
         Global Note. A beneficial interest in any Restricted Global Note may
         be exchanged by any holder thereof for a beneficial interest in an
         Unrestricted Global Note or transferred to a Person who takes delivery
         thereof in the form of a beneficial interest in an Unrestricted Global
         Note if the exchange or transfer complies with the requirements of
         clause (ii) above and:

                                    (A) such exchange or transfer is effected
                  pursuant to the Exchange Offer in accordance with the
                  Registration Rights Agreement and the holder of the
                  beneficial interest to be transferred, in the case of an
                  exchange, or the transferee, in the case of a transfer, is
                  not (1) a broker-dealer, (2) a Person participating in the
                  distribution of the Exchange Notes or (3) a Person who is an
                  affiliate (as defined in Rule 144) of the Partnership;

                                    (B) any such transfer is effected pursuant
                  to the Shelf Registration Statement in accordance with the
                  Registration Rights Agreement;

                                    (C) any such transfer is effected by a
                  Participating Broker-Dealer pursuant to the Exchange Offer
                  Registration Statement in accordance with the Registration
                  Rights Agreement; or

                                    (D) the Registrar receives the following:

                                             (1) if the holder of such
                  beneficial interest in a Restricted Global Note proposes to
                  exchange such beneficial interest for a beneficial interest
                  in an Unrestricted Global Note, a certificate from such
                  holder in the form of Exhibit C hereto, including the
                  certifications in Item (1) thereof;

                                             (2) if the holder of such
                  beneficial interest in a Restricted Global Note proposes to
                  transfer such beneficial interest to a Person who shall take
                  delivery thereof in the form of a beneficial interest in an
                  Unrestricted Global Note, a certificate from such holder in
                  the form of Exhibit B hereto, including the certifications in
                  Item (4) thereof; and

                                             (3) in each such case set forth in
                  this subparagraph (D), an Opinion of Counsel in form
                  reasonably acceptable to the Registrar to the effect that
                  such exchange or transfer is in compliance with the
                  Securities Act and that the restrictions on transfer
                  contained herein and in the Private Placement Legend are not
                  required in order to maintain compliance with the Securities
                  Act.

                                     -17-
<PAGE>

         If any such transfer is effected pursuant to subparagraph (B) or (D)
above at a time when an Unrestricted Global Note has not yet been issued, the
Partnership shall issue and, upon receipt of an authentication order in
accordance with Section 2.02 hereof, the Trustee shall authenticate one or more
Unrestricted Global Notes in an aggregate principal amount equal to the
principal amount of beneficial interests transferred pursuant to subparagraph
(B) or (D) above.

         Beneficial interests in an Unrestricted Global Note cannot be
exchanged for, or transferred to Persons who take delivery thereof in the form
of, a beneficial interest in a Restricted Global Note.

                  (c) Transfer or Exchange of Beneficial Interests for
         Definitive Notes.

                           (i) If any holder of a beneficial interest in a
         Restricted Global Note proposes to exchange such beneficial interest
         for a Definitive Note or to transfer such beneficial interest to a
         Person who takes delivery thereof in the form of a Definitive Note,
         then, upon receipt by the Registrar of the following documentation:

                                    (A) if the holder of such beneficial
                  interest in a Restricted Global Note proposes to exchange
                  such beneficial interest for a Definitive Note, a certificate
                  from such holder in the form of Exhibit C hereto, including
                  the certifications in Item (2) thereof;

                                    (B) if such beneficial interest is being
                  transferred to a QIB in accordance with Rule 144A under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in Item (1)
                  thereof;

                                    (C) if such beneficial interest is being
                  transferred pursuant to an exemption from the registration
                  requirements of the Securities Act in accordance with Rule
                  144 under the Securities Act, a certificate to the effect set
                  forth in Exhibit B hereto, including the certifications in
                  Item (3)(a) thereof;

                                    (D) if such beneficial interest is being
                  transferred pursuant to any other exemption (including a
                  beneficial interest being transferred to an Institutional
                  Accredited Investor) from the registration requirements of
                  the Securities Act, then the transferor must deliver a
                  certificate in the form of Exhibit B hereto, including the
                  certifications, certificates and Opinion of Counsel required
                  by Item (3) thereof, if applicable;

                                    (E) if such beneficial interest is being
                  transferred to the Partnership or any of its Subsidiaries, a
                  certificate to the effect set forth in Exhibit B hereto,
                  including the certifications in Item (3)(b) thereof; or

                                    (F) if such beneficial interest is being
                  transferred pursuant to an effective registration statement
                  under the Securities Act, a certificate to the effect set
                  forth in Exhibit B hereto, including the certifications in
                  Item (3)(c) thereof, the Trustee, upon notice of receipt of
                  such documentation by the Registrar, shall cause the
                  aggregate principal amount of the applicable Global Note to
                  be reduced

                                     -18-
<PAGE>

                  accordingly pursuant to Section 2.06(h) hereof, and the
                  Partnership shall execute and the Trustee shall authenticate
                  and make available for delivery to the Person designated in
                  the instructions a Definitive Note in the appropriate
                  principal amount. Any Definitive Note issued in exchange for
                  a beneficial interest in a Restricted Global Note pursuant to
                  this Section 2.06(c) shall be registered in such name or
                  names and in such authorized denomination or denominations as
                  the holder of such beneficial interest shall instruct the
                  Registrar through instructions from the Depositary and the
                  Participant or Indirect Participant. The Trustee shall make
                  available for delivery such Definitive Notes to the Persons
                  in whose names such Notes are so registered. Any Definitive
                  Note issued in exchange for a beneficial interest in a
                  Restricted Global Note pursuant to this Section 2.06(c)(i)
                  shall bear the Private Placement Legend and shall be subject
                  to all restrictions on transfer contained therein.

                           (ii) Notwithstanding Section 2.06(c)(i) hereof, a
         holder of a beneficial interest in a Restricted Global Note may
         exchange such beneficial interest for an Unrestricted Definitive Note
         or may transfer such beneficial interest to a Person who takes
         delivery thereof in the form of an Unrestricted Definitive Note only
         if:

                                    (A) such exchange or transfer is effected
                  pursuant to the Exchange Offer in accordance with the
                  Registration Rights Agreement and the holder of such
                  beneficial interest, in the case of an exchange, or the
                  transferee, in the case of a transfer, is not (1) a
                  broker-dealer, (2) a Person participating in the distribution
                  of the Exchange Notes or (3) a Person who is an affiliate (as
                  defined in Rule 144) of the Partnership;

                                    (B) any such transfer is effected pursuant
                  to the Shelf Registration Statement in accordance with the
                  Registration Rights Agreement;

                                    (C) any such transfer is effected by a
                  Participating Broker-Dealer pursuant to the Exchange Offer
                  Registration Statement in accordance with the Registration
                  Rights Agreement; or

                                    (D) the Registrar receives the following:

                                             (1) if the holder of such
                  beneficial interest in a Restricted Global Note proposes to
                  exchange such beneficial interest for a Definitive Note that
                  does not bear the Private Placement Legend, a certificate
                  from such holder in the form of Exhibit C hereto, including
                  the certifications in Item (2) thereof;

                                             (2) if the holder of such
                  beneficial interest in a Restricted Global Note proposes to
                  transfer such beneficial interest to a Person who shall take
                  delivery thereof in the form of a Definitive Note that does
                  not bear the Private Placement Legend, a certificate from
                  such holder in the form of Exhibit B hereto, including the
                  certifications in Item (4) thereof; and

                                     -19-
<PAGE>

                                             (3) in each such case set forth in
                  this subparagraph (D), an Opinion of Counsel in form
                  reasonably acceptable to the Partnership, to the effect that
                  such exchange or transfer is in compliance with the
                  Securities Act and that the restrictions on transfer
                  contained herein and in the Private Placement Legend are not
                  required in order to maintain compliance with the Securities
                  Act.

                           (iii) If any holder of a beneficial interest in an
         Unrestricted Global Note proposes to exchange such beneficial interest
         for a Definitive Note or to transfer such beneficial interest to a
         Person who takes delivery thereof in the form of a Definitive Note,
         then, upon satisfaction of the conditions set forth in Section
         2.06(b)(ii) hereof, the Trustee shall cause the aggregate principal
         amount of the applicable Global Note to be reduced accordingly
         pursuant to Section 2.06(h) hereof, and the Partnership shall execute
         and the Trustee shall authenticate and make available for delivery to
         the Person designated in the instructions a Definitive Note in the
         appropriate principal amount. Any Definitive Note issued in exchange
         for a beneficial interest pursuant to this Section 2.06(c)(iii) shall
         be registered in such name or names and in such authorized
         denomination or denominations as the holder of such beneficial
         interest shall instruct the Registrar through instructions from the
         Depositary and the Participant or Indirect Participant. The Trustee
         shall make available for delivery such Definitive Notes to the Persons
         in whose names such Notes are so registered. Any Definitive Note
         issued in exchange for a beneficial interest pursuant to this Section
         2.06(c)(iii) shall not bear the Private Placement Legend. A beneficial
         interest in an Unrestricted Global Note cannot be exchanged for a
         Definitive Note bearing the Private Placement Legend or transferred to
         a Person who takes delivery thereof in the form of a Definitive Note
         bearing the Private Placement Legend.

                  (d) Transfer and Exchange of Definitive Notes for Beneficial
Interests.

                           (i) If any Holder of a Restricted Definitive Note
         proposes to exchange such Note for a beneficial interest in a
         Restricted Global Note or to transfer such Definitive Notes to a
         Person who takes delivery thereof in the form of a beneficial interest
         in a Restricted Global Note, then, upon receipt by the Registrar of
         the following documentation:

                                    (A) if the Holder of such Restricted
                  Definitive Note proposes to exchange such Note for a
                  beneficial interest in a Restricted Global Note, a
                  certificate from such Holder in the form of Exhibit C hereto,
                  including the certifications in Item (6) thereof;

                                    (B) if such Definitive Note is being
                  transferred to a QIB in accordance with Rule 144A under the
                  Securities Act, a certificate to the effect set forth in
                  Exhibit B hereto, including the certifications in Item (1)
                  thereof;

                                    (C) if such Definitive Note is being
                  transferred pursuant to an exemption from the registration
                  requirements of the Securities Act in accordance with Rule
                  144 under the Securities Act, a certificate to the effect set
                  forth in Exhibit B hereto, including the certifications in
                  Item (3)(a) thereof;

                                     -20-
<PAGE>

                                    (D) if such Definitive Note is being
                  transferred to an Institutional Accredited Investor or in
                  reliance on any other exemption from the registration
                  requirements of the Securities Act, in either case, other
                  than those listed in subparagraphs (B) and (C) above, a
                  certificate in the form of Exhibit B hereto, including
                  certifications, certificates, and any Opinion of Counsel
                  required by Item (3) thereof, if applicable;

                                    (E) if such Definitive Note is being
                  transferred to the Partnership or any of its Subsidiaries, a
                  certificate to the effect set forth in Exhibit B hereto,
                  including the certifications in Item (3)(b) thereof; or

                                    (F) if such Definitive Note is being
                  transferred pursuant to an effective registration statement
                  under the Securities Act, a certificate to the effect set
                  forth in Exhibit B hereto, including the certifications in
                  Item (3)(c) thereof,

the Trustee, upon notice of receipt of such documentation by the Registrar,
shall cancel the Definitive Note, increase or cause to be increased the
aggregate principal amount of, in the case of subparagraph (A) above, the
appropriate Restricted Global Note and, in the case of subparagraph (B) above,
the Rule 144A Global Note.

                           (ii) A Holder of a Restricted Definitive Note may
         exchange such Note for a beneficial interest in an Unrestricted Global
         Note or transfer such Restricted Definitive Note to a Person who takes
         delivery thereof in the form of a beneficial interest in an
         Unrestricted Global Note only if:

                                    (A) such exchange or transfer is effected
                  pursuant to the Exchange Offer in accordance with the
                  Registration Rights Agreement and the Holder, in the case of
                  an exchange, or the transferee, in the case of a transfer, is
                  not (1) a broker-dealer, (2) a Person participating in the
                  distribution of the Exchange Notes or (3) a Person who is an
                  affiliate (as defined in Rule 144) of the Partnership;

                                    (B) any such transfer is effected pursuant
                  to the Shelf Registration Statement in accordance with the
                  Registration Rights Agreement;

                                    (C) any such transfer is effected by a
                  Participating Broker-Dealer pursuant to the Exchange Offer
                  Registration Statement in accordance with the Registration
                  Rights Agreement; or

                                    (D) the Registrar receives the following:

                                             (1) if the Holder of such
                  Definitive Notes proposes to exchange such Notes for a
                  beneficial interest in the Unrestricted Global Note, a
                  certificate from such Holder in the form of Exhibit C hereto,
                  including the certifications in Item (4) thereof;

                                     -21-
<PAGE>

                                             (2) if the Holder of such
                  Definitive Notes proposes to transfer such Notes to a Person
                  who shall take delivery thereof in the form of a beneficial
                  interest in the Unrestricted Global Note, a certificate from
                  such Holder in the form of Exhibit B hereto, including the
                  certifications in Item (4) thereof; and

                                             (3) in each such case set forth in
                  this subparagraph (D), an Opinion of Counsel in form
                  reasonably acceptable to the Partnership to the effect that
                  such exchange or transfer is in compliance with the
                  Securities Act, that the restrictions on transfer contained
                  herein and in the Private Placement Legend are not required
                  in order to maintain compliance with the Securities Act, and
                  such Definitive Notes are being exchanged or transferred in
                  compliance with any applicable blue sky securities laws of
                  any State of the United States.

Upon satisfaction of the conditions of any of the subparagraphs in this Section
2.06(d)(ii), the Trustee shall cancel the Definitive Notes and increase or
cause to be increased the aggregate principal amount of the Unrestricted Global
Note.

                           (iii) A Holder of an Unrestricted Definitive Note may
         exchange such Note for a beneficial interest in an Unrestricted Global
         Note or transfer such Definitive Notes to a Person who takes delivery
         thereof in the form of a beneficial interest in an Unrestricted Global
         Note at any time. Upon receipt of a request for such an exchange or
         transfer, the Trustee shall cancel the applicable Unrestricted
         Definitive Note and increase or cause to be increased the aggregate
         principal amount of one of the Unrestricted Global Notes.

                           (iv) If any such exchange or transfer from a
         Definitive Note to a beneficial interest is effected pursuant to
         subparagraphs (ii)(B), (ii)(D) or (iii) above at a time when an
         Unrestricted Global Note has not yet been issued, the Partnership
         shall issue and, upon receipt of an authentication order in accordance
         with Section 2.02 hereof, the Trustee shall authenticate one or more
         Unrestricted Global Notes in an aggregate principal amount equal to
         the principal amount of beneficial interests transferred pursuant to
         subparagraphs (ii)(B), (ii)(D) or (iii) above.

                  (e) Transfer and Exchange of Definitive Notes for Definitive
Notes. Upon request by a Holder of Definitive Notes and such Holder's
compliance with the provisions of this Section 2.06(e), the Registrar shall
register the transfer or exchange of Definitive Notes. Prior to such
registration of transfer or exchange, the requesting Holder shall present or
surrender to the Registrar the Definitive Notes duly endorsed or accompanied by
a written instruction of transfer in form satisfactory to the Registrar duly
executed by such Holder or by his attorney, duly authorized in writing. In
addition, the requesting Holder shall provide any additional certifications,
documents and information, as applicable, pursuant to the provisions of this
Section 2.06(e).

                           (i) Restricted Definitive Notes may be transferred
         to and registered in the name of Persons who take delivery thereof if
         the Registrar receives the following:

                                     -22-
<PAGE>

                                    (A) if the transfer will be made pursuant
                  to Rule 144A under the Securities Act, then the transferor
                  must deliver a certificate in the form of Exhibit B hereto,
                  including the certifications in Item (1) thereof; or

                                    (B) if the transfer will be made pursuant
                  to any other exemption from the registration requirements of
                  the Securities Act, then the transferor must deliver a
                  certificate in the form of Exhibit B hereto, including the
                  certifications, certificates and Opinion of Counsel required
                  by Item (3) thereof, if applicable.

                           (ii) Any Restricted Definitive Note may be exchanged
         by the Holder thereof for an Unrestricted Definitive Note or
         transferred to a Person or Persons who take delivery thereof in the
         form of an Unrestricted Definitive Note if:

                                    (A) such exchange or transfer is effected
                  pursuant to the Exchange Offer in accordance with the
                  Registration Rights Agreement and the Holder, in the case of
                  an exchange, or the transferee, in the case of a transfer, is
                  not (1) a broker-dealer, (2) a Person participating in the
                  distribution of the Exchange Notes or (3) a Person who is an
                  affiliate (as defined in Rule 144) of the Partnership;

                                    (B) any such transfer is effected pursuant
                  to the Shelf Registration Statement in accordance with the
                  Registration Rights Agreement;

                                    (C) any such transfer is effected by a
                  Participating Broker-Dealer pursuant to the Exchange Offer
                  Registration Statement in accordance with the Registration
                  Rights Agreement; or

                                    (D) the Registrar receives the following:

                                             (1) if the Holder of such
                  Restricted Definitive Notes proposes to exchange such Notes
                  for an Unrestricted Definitive Note, a certificate from such
                  Holder in the form of Exhibit C hereto, including the
                  certifications in Item (4) thereof;

                                             (2) if the Holder of such
                  Restricted Definitive Notes proposes to transfer such Notes
                  to a Person who shall take delivery thereof in the form of an
                  Unrestricted Definitive Note, a certificate from such Holder
                  in the form of Exhibit B hereto, including the certifications
                  in Item (4) thereof; and

                                             (3) in each such case set forth in
                  this subparagraph (D), an Opinion of Counsel in form
                  reasonably acceptable to the Partnership to the effect that
                  such exchange or transfer is in compliance with the
                  Securities Act, that the restrictions on transfer contained
                  herein and in the Private Placement Legend are not required
                  in order to maintain compliance with the Securities Act, and
                  such Restricted Definitive Note is being exchanged or
                  transferred in compliance with any applicable blue sky
                  securities laws of any State of the United States.

                                     -23-
<PAGE>

                           (iii) A Holder of Unrestricted Definitive Notes may
         transfer such Notes to a Person who takes delivery thereof in the form
         of an Unrestricted Definitive Note. Upon receipt of a request for such
         a transfer, the Registrar shall register the Unrestricted Definitive
         Notes pursuant to the instructions from the Holder thereof.
         Unrestricted Definitive Notes cannot be exchanged for or transferred
         to Persons who take delivery thereof in the form of a Restricted
         Definitive Note.

                  (f) Exchange Offer. Upon the occurrence of the Exchange Offer
in accordance with the Registration Rights Agreement, the Partnership shall
issue and, upon receipt of (A) an authentication order in accordance with
Section 2.02 hereof and (B) an Opinion of Counsel opining as to the
enforceability of the Exchange Notes and the guarantees thereof, the Trustee
shall authenticate (i) one or more Unrestricted Global Notes in an aggregate
principal amount equal to the principal amount of the beneficial interests in
the Restricted Global Notes tendered for acceptance by persons that are not (x)
broker-dealers, (y) Persons participating in the distribution of the Exchange
Notes or (z) Persons who are affiliates (as defined in Rule 144) of the
Partnership and accepted for exchange in the Exchange Offer and (ii) Definitive
Notes in an aggregate principal amount equal to the principal amount of the
Restricted Definitive Notes accepted for exchange in the Exchange Offer.
Concurrent with the issuance of such Notes, the Trustee shall cause the
aggregate principal amount of the applicable Restricted Global Notes to be
reduced accordingly, and the Partnership shall execute and the Trustee shall
authenticate and make available for delivery to the Persons designated by the
Holders of Definitive Notes so accepted Definitive Notes in the appropriate
principal amount.

                  (g) Legends. The following legends shall appear on the face of
all Global Notes and Definitive Notes issued under this Indenture unless
specifically stated otherwise in the applicable provisions of this Indenture.

                           (i) Private Placement Legend.

                                    (A) Except as permitted by subparagraph (B)
                  below, each Global Note and each Definitive Note (and all
                  Notes issued in exchange therefor or substitution thereof)
                  shall bear the legend in substantially the following form:

                  "THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER
         THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR
         ANY STATE SECURITIES LAWS. ACCORDINGLY, THIS NOTE MAY NOT BE OFFERED,
         SOLD, PLEDGED, OR OTHERWISE TRANSFERRED WITHIN THE UNITED STATES OR
         TO, OR FOR THE ACCOUNT OR BENEFIT OF U.S. PERSONS, EXCEPT AS SET FORTH
         IN THE NEXT SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL
         INTEREST HEREIN, THE HOLDER:

                   (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL
                  BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) (A
                  "QIB") OR (B) IT IS AN INSTITUTIONAL "ACCREDITED

                                     -24-
<PAGE>

                  INVESTOR" (AS DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF
                  REGULATION D UNDER THE SECURITIES ACT (AN "IAI")),

                  (2) AGREES THAT IT WILL NOT RESELL, OR OTHERWISE TRANSFER
                  THIS NOTE EXCEPT (A) TO NORTHERN BORDER PARTNERS, L.P. OR ANY
                  OF ITS SUBSIDIARIES, (B) TO A PERSON WHOM THE SELLER
                  REASONABLY BELIEVES IS A QIB PURCHASING FOR ITS OWN ACCOUNT
                  OR FOR THE ACCOUNT OF A QIB IN A TRANSACTION MEETING THE
                  REQUIREMENTS OF RULE 144A, (C) IN A TRANSACTION MEETING THE
                  REQUIREMENTS OF RULE 144 UNDER THE SECURITIES ACT, (D) TO AN
                  IAI THAT, PRIOR TO SUCH TRANSFER, FURNISHES THE TRUSTEE WITH
                  A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND
                  AGREEMENTS RELATING TO THE TRANSFER OF THIS NOTE (THE FORM OF
                  WHICH CAN BE OBTAINED FROM THE TRUSTEE) AND, IF SUCH TRANSFER
                  IS IN RESPECT OF AN AGGREGATE PRINCIPAL AMOUNT OF NOTES LESS
                  THAN $250,000, AN OPINION OF COUNSEL ACCEPTABLE TO THE
                  TRANSFER AGENT THAT SUCH TRANSFER IS IN COMPLIANCE WITH THE
                  SECURITIES ACT, (E) IN ACCORDANCE WITH ANOTHER EXEMPTION FROM
                  THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT (AND
                  BASED UPON AN OPINION OF COUNSEL ACCEPTABLE TO NORTHERN
                  BORDER PARTNERS, L.P.), OR (F) PURSUANT TO AN EFFECTIVE
                  REGISTRATION STATEMENT UNDER THE SECURITIES ACT, AND, IN EACH
                  CASE, IN ACCORDANCE WITH THE APPLICABLE SECURITIES LAWS OF
                  ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE
                  JURISDICTION, AND

                  (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS
                  NOTE OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE
                  SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

                            THE INDENTURE CONTAINS A PROVISION REQUIRING THE
                  TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS NOTE IN
                  VIOLATION OF THE FOREGOING."

                                    (B) Notwithstanding the foregoing, any
                  Global Note or Definitive Note issued pursuant to
                  subparagraph (b)(iv), (c)(iii), (d)(ii), (d)(iii), (e)(ii),
                  (e)(iii) or (f) of this Section 2.06 (and all Notes issued in
                  exchange therefor or substitution thereof) shall not bear the
                  Private Placement Legend.

                           (ii) Global Note Legend. Each Global Note shall bear
         a legend in substantially the following form:

                                     -25-
<PAGE>

         UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN
         DEFINITIVE FORM, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY
         THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE
         DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR
         BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A
         NOMINEE OF SUCH SUCCESSOR DEPOSITARY. THE DEPOSITORY TRUST COMPANY
         SHALL ACT AS THE DEPOSITARY UNTIL A SUCCESSOR SHALL BE APPOINTED BY
         THE COMPANY AND THE REGISTRAR. UNLESS THIS CERTIFICATE IS PRESENTED BY
         AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER
         STREET, NEW YORK, NEW YORK) ("DTC"), TO THE ISSUER OR ITS AGENT FOR
         REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE
         ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS
         MAY BE REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
         PAYMENT IS MADE TO CEDE & CO. OR SUCH OTHER ENTITY AS MAY BE 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.

                  (h) Cancellation and/or Adjustment of Global Notes. At such
time as all beneficial interests in a particular Global Note have been
exchanged for Definitive Notes or a particular Global Note has been redeemed,
repurchased or canceled in whole and not in part, each such Global Note shall
be returned to or retained and canceled by the Trustee in accordance with
Section 2.11 hereof. At any time prior to such cancellation, if any beneficial
interest in a Global Note is exchanged for or transferred to a Person who will
take delivery thereof in the form of a beneficial interest in another Global
Note or for Definitive Notes, the principal amount of Notes represented by such
Global Note shall be reduced accordingly and an endorsement shall be made on
such Global Note, by the Trustee, the Note Custodian or the Depositary at the
direction of the Trustee, to reflect such reduction; and if the beneficial
interest is being exchanged for or transferred to a Person who will take
delivery thereof in the form of a beneficial interest in another Global Note,
such other Global Note shall be increased accordingly and an endorsement shall
be made on such Global Note, by the Trustee, the Note Custodian or by the
Depositary at the direction of the Trustee, to reflect such increase.

                  (i) General Provisions Relating to Transfers and Exchanges.

                           (i) To permit registrations of transfers and
         exchanges, the Partnership shall execute and the Trustee shall
         authenticate Global Notes and Definitive Notes upon the Partnership's
         order or at the Registrar's request.

                           (ii) No service charge shall be made to a Holder of a
         beneficial interest in a Global Note or to a Holder of a Definitive
         Note for any registration of transfer or exchange, but the Partnership
         may require payment of a sum sufficient to cover any transfer

                                     -26-
<PAGE>

         tax or similar governmental charge payable in connection therewith
         (other than any such transfer taxes or similar governmental charge
         payable upon exchange or transfer pursuant to Sections 2.10, 3.06 and
         9.05 hereof).

                           (iii) The Registrar shall not be required to register
         the transfer or exchange of any Note selected for redemption in whole
         or in part, except the unredeemed portion of any Note being redeemed
         in part.

                           (iv) All Global Notes and Definitive Notes issued
         upon any registration of transfer or exchange of Global Notes or
         Definitive Notes shall be the valid obligations of the Partnership,
         evidencing the same debt, and entitled to the same benefits under this
         Indenture, as the Global Notes or Definitive Notes surrendered upon
         such registration of transfer or exchange.

                           (v) The Partnership shall not be required (A) to
         issue, to register the transfer of or to exchange Notes during a
         period beginning at the opening of business 15 days before the day of
         any selection of Notes for redemption under Section 3.02 hereof and
         ending at the close of business on the day of selection, (B) to
         register the transfer of or to exchange any Note so selected for
         redemption in whole or in part, except the unredeemed portion of any
         Note being redeemed in part or (C) to register the transfer of or to
         exchange a Note between a record date and the next succeeding Interest
         Payment Date.

                           (vi) Prior to due presentment for the registration of
         a transfer of any Note, the Trustee, any Agent and the Partnership may
         deem and treat the Person in whose name any Note is registered as the
         absolute owner of such Note for the purpose of receiving payment of
         principal of and interest on such Notes and for all other purposes,
         and none of the Trustee, any Agent or the Partnership shall be
         affected by notice to the contrary.

                           (vii) The Trustee shall authenticate Global Notes and
         Definitive Notes in accordance with the provisions of Section 2.02
         hereof.

                           (viii) All certifications, certificates and Opinions
         of Counsel required to be submitted to the Registrar pursuant to this
         Section 2.06 to effect a transfer or exchange may be submitted by
         facsimile.

SECTION 2.07 Replacement Notes.

         If any mutilated Note is surrendered to the Trustee or the Partnership
and the Trustee receives evidence to its satisfaction of the destruction, loss
or theft of any Note, the Partnership shall issue and the Trustee, upon the
written order of the Partnership signed by two Officers of the Partnership,
shall authenticate a replacement Note if the Trustee's requirements are met. If
required by the Trustee or the Partnership, an indemnity bond must be supplied
by the Holder that is sufficient in the judgment of the Trustee and the
Partnership to protect the Partnership, the Trustee, any Agent and any
Authenticating Agent from any loss that any of them may suffer if a Note is
replaced. The Partnership may charge for its expenses in replacing a Note.

                                     -27-
<PAGE>

         Every replacement Note is an additional obligation of the Partnership
and shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Notes duly issued hereunder.

SECTION 2.08 Outstanding Notes.

         The Notes outstanding at any time are all the Notes authenticated by
the Trustee except for those canceled by it, those delivered to it for
cancellation, those reductions in the interest in a Global Note effected by the
Trustee in accordance with the provisions hereof, and those described in this
Section as not outstanding. Except as set forth in Section 2.09 hereof, a Note
does not cease to be outstanding because the Partnership or an Affiliate of the
Partnership holds the Note.

         If a Note is replaced pursuant to Section 2.07 hereof, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser. If the principal amount of any
Note is considered paid under Section 4.01 hereof, it ceases to be outstanding
and interest and Liquidated Damages, if any, on it cease to accrue.

         If the Paying Agent (other than the Partnership, a Subsidiary or an
Affiliate of any thereof) holds, on a Redemption Date or maturity date, money
sufficient to pay Notes payable on that date, then on and after that date such
Notes shall be deemed to be no longer outstanding and shall cease to accrue
interest and Liquidated Damages, if any.

SECTION 2.09 Treasury Notes.

         In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Partnership, or by any Person directly or indirectly controlling or controlled
by or under direct or indirect common control with the Partnership, shall be
considered as though not outstanding, except that for the purposes of
determining whether the Trustee shall be protected in relying on any such
direction, waiver or consent, only Notes that a Responsible Officer of the
Trustee actually knows are so owned shall be so disregarded.

SECTION 2.10 Temporary Notes.

         Until Definitive Notes are ready for delivery, the Partnership may
prepare and the Trustee shall authenticate temporary Notes upon a written order
of the Partnership signed by two Officers of the Partnership. Temporary Notes
shall be substantially in the form of Definitive Notes but may have variations
that the Partnership considers appropriate for temporary Notes and as shall be
reasonably acceptable to the Trustee. Without unreasonable delay, the
Partnership shall prepare and the Trustee shall authenticate Definitive Notes
in exchange for temporary Notes.

         Holders of temporary Notes shall be entitled to all of the benefits of
this Indenture.

                                     -28-
<PAGE>

SECTION 2.11 Cancellation.

         The Partnership at any time may deliver Notes to the Trustee for
cancellation. The Registrar and Paying Agent shall forward to the Trustee any
Notes surrendered to them for registration of transfer, exchange or payment.
The Trustee and no one else shall cancel all Notes surrendered for registration
of transfer, exchange, payment, replacement or cancellation and shall return
such canceled Notes to the Partnership upon the Partnership's written request.
The Partnership may not issue new Notes to replace Notes that it has paid or
that have been delivered to the Trustee for cancellation.

SECTION 2.12 Defaulted Interest.

         If the Partnership defaults in a payment of interest on the Notes, it
shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest payable on the defaulted interest, to the Persons who are
Holders on a subsequent record date, in each case at the rate provided in the
Notes. The Partnership shall promptly notify the Trustee in writing of the
amount of defaulted interest proposed to be paid on each Note and the date of
the proposed payment. The Partnership shall fix or cause to be fixed each such
record date and payment date, provided that no such record date shall be less
than 10 days prior to the related payment date for such defaulted interest. At
least 15 days before the record date, the Partnership (or, upon the written
request of the Partnership, the Trustee in the name and at the expense of the
Partnership) shall mail or cause to be mailed to Holders a notice that states
the record date, the related payment date and the amount of such interest to be
paid.

SECTION 2.13 CUSIP Numbers.

         The Partnership in issuing the Notes may use "CUSIP" numbers (if then
generally in use), and, if so, the Trustee shall use "CUSIP" numbers in notices
of redemption as a convenience to Holders; provided that any such notice may
state that no representation is made as to the correctness of such numbers
either as printed on the Notes or as contained in any notice of a redemption
and that reliance may be placed only on the other identification numbers
printed on the Notes, and any such redemption shall not be affected by any
defect in or omission of such numbers. The Partnership will promptly notify the
Trustee of any change in the "CUSIP" numbers.

                                  ARTICLE III

                           REDEMPTION AND PREPAYMENT

SECTION 3.01 Notices to Trustee.

         The Partnership may elect to redeem Notes in whole or in part,
provided, however, that it shall furnish to the Trustee, at least 30 days but
not more than 60 days before a Redemption Date, an Officers' Certificate
setting forth (i) the Redemption Date, (ii) the principal amount of Notes to be
redeemed and (iii) the redemption price.

                                     -29-
<PAGE>

SECTION 3.02 Selection of Notes to be Redeemed.

         If less than all of the Notes are to be redeemed at any time,
selection of Notes for redemption shall be made by the Trustee in compliance
with the requirements of the principal national securities exchange, if any, on
which the Notes are listed or, if the Notes are not so listed, on a pro rata
basis, by lot or in accordance with any other method the Trustee considers fair
and appropriate; provided that no Notes of $1,000 or less shall be redeemed in
part. In the event of partial redemption by lot, the particular Notes to be
redeemed shall be selected, unless otherwise provided herein, not less than 30
nor more than 60 days prior to the Redemption Date by the Trustee from the
outstanding Notes not previously called for redemption.

         The Trustee shall promptly notify the Partnership in writing of the
Notes selected for redemption and, in the case of any Note selected for partial
redemption, the principal amount thereof to be redeemed. Notes and portions of
Notes selected shall be in amounts of $1,000 or whole multiples of $1,000.
Except as provided in the preceding sentence, provisions of this Indenture that
apply to Notes called for redemption also apply to portions of Notes called for
redemption.

SECTION 3.03 Notice of Redemption.

         At least 30 days but not more than 60 days before a Redemption Date,
the Partnership shall mail or cause to be mailed, by first class mail, a notice
of redemption to each Holder whose Notes are to be redeemed at its registered
address.

         The notice shall identify the Notes (including CUSIP numbers) to be
redeemed and shall state

                  (a) the Redemption Date;

                  (b) the redemption price as computed in accordance with the
terms of the Notes;

                  (c) if any Note is being redeemed in part, the portion of the
principal amount of such Note to be redeemed and that, after the Redemption
Date upon surrender of such Note, a new Note or Notes in principal amount equal
to the unredeemed portion shall be issued upon cancellation of the original
Note;

                  (d) the name and address of the Paying Agent;

                  (e) that Notes called for redemption must be surrendered to
the Paying Agent to collect the redemption price;

                  (f) that, unless the Partnership defaults in making such
redemption payment, interest and Liquidated Damages, if any, on Notes called
for redemption cease to accrue on and after the Redemption Date;

                  (g) the paragraph of the Notes and/or Section of this
Indenture pursuant to which the Notes called for redemption are being redeemed;
and

                                     -30-
<PAGE>

                  (h) that no representation is made as to the correctness or
accuracy of the CUSIP number, if any, listed in such notice or printed on the
Notes.

         At the Partnership's request, the Trustee shall give the notice of
redemption in the Partnership's name and at its expense; provided, however,
that the Partnership shall have delivered to the Trustee, at least 30 days
prior to the Redemption Date, an Officers' Certificate requesting that the
Trustee give such notice and setting forth the information to be stated in such
notice as provided in the preceding paragraph.

SECTION 3.04 Effect of Notice of Redemption.

         Once notice of redemption is mailed in accordance with Section 3.03
hereof, Notes called for redemption become irrevocably due and payable on the
Redemption Date at the redemption price. A notice of redemption may not be
conditional.

SECTION 3.05 Deposit of Redemption Price.

         No later than 10:00 a.m. New York City Time on the Redemption Date,
the Partnership shall deposit with the Trustee or with the Paying Agent money
sufficient to pay the redemption price (as calculated in accordance with the
terms of the Notes) of and accrued interest and Liquidated Damages, if any, on
all Notes to be redeemed on that date. The Trustee or the Paying Agent shall
promptly return to the Partnership any money deposited with the Trustee or the
Paying Agent by the Partnership in excess of the amounts necessary to pay the
redemption price of, and accrued interest and Liquidated Damages, if any, on,
all Notes to be redeemed.

         If the Partnership complies with the provisions of the preceding
paragraph, on and after the Redemption Date, interest, and Liquidated Damages,
if any, shall cease to accrue on the Notes or the portions of Notes called for
redemption. If a Note is redeemed on or after an interest record date but on or
prior to the related Interest Payment Date, then any accrued and unpaid
interest and Liquidated Damages, if any, shall be paid to the Person in whose
name such Note was registered at the close of business on such record date. If
any Note called for redemption shall not be so paid upon surrender for
redemption because of the failure of the Partnership to comply with the
preceding paragraph, interest shall be paid on the unpaid principal, from the
Redemption Date until such principal is paid, and to the extent lawful on any
interest not paid on such unpaid principal, in each case at the rate provided
in the Notes and in Section 4.01 hereof.

SECTION 3.06 Notes Redeemed in Part.

         Upon surrender of a Note that is redeemed in part, the Partnership
shall issue and, upon the Partnership's written request, the Trustee shall
authenticate for the Holder at the expense of the Partnership a new Note equal
in principal amount to the unredeemed portion of the Note surrendered.

                                     -31-

<PAGE>
                                                                  EXHIBIT 4.1

SECTION 3.07 Mandatory Redemption

         The Partnership shall not be required to make mandatory redemption or
sinking fund payments with respect to the Notes.

                                   ARTICLE IV

                                   COVENANTS

SECTION 4.01 Payment of Notes.

         The Partnership shall pay or cause to be paid the principal of,
premium, if any, and interest and Liquidated Damages, if any, on the Notes on
the dates and in the manner provided in the Notes. Principal, premium, if any,
interest and Liquidated Damages, if any, shall be considered paid on the date
due if the Paying Agent, if other than the Partnership or a Subsidiary thereof,
holds as of 10:00 a.m. New York City Time on the due date money deposited by the
Partnership in immediately available funds and designated for and sufficient to
pay all principal, premium, if any, interest and Liquidated Damages, if any,
then due. The Partnership shall pay all Liquidated Damages, if any, in the same
manner on the dates and in the amounts set forth in the Registration Rights
Agreement.

         The Partnership shall pay interest (including post-petition interest in
any proceeding under the Bankruptcy Code) on overdue principal at the rate borne
on the Notes to the extent lawful; it shall pay interest (including
post-petition interest in any proceeding under the Bankruptcy Code) on overdue
installments of interest and Liquidated Damages, if any, (without regard to any
applicable grace period) at the same rate to the extent lawful.

SECTION 4.02 Maintenance of Office or Agency.

         The Partnership shall maintain in the Borough of Manhattan, the City of
New York, an office or agency (which may be an office of the Trustee or an
affiliate of the Trustee, Registrar or co-registrar) where Notes may be
surrendered for registration of transfer or for exchange and where notices and
demands to or upon the Partnership in respect of the Notes and this Indenture
may be served. The Partnership shall give prompt written notice to the Trustee
of the location, and any change in the location, of such office or agency. If at
any time the Partnership 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.

         The Partnership may also from time to time designate one or more other
offices or agencies where the Notes may be presented or surrendered for any or
all 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
Partnership of its obligation to maintain an office or agency in the Borough of
Manhattan, the City of New York for such purposes. The Partnership shall 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.

                                      -32-
<PAGE>

         The Partnership hereby designates the office of the Trustee at 14 Wall
Street, 8th floor, New York, New York 10005, as one such office or agency of the
Partnership in accordance with Section 2.03 hereof.

SECTION 4.03 Reports.

                  (a) The Partnership, pursuant to Section 314(a) of the
Trust Indenture Act, shall:

                           (i) For as long as the Partnership is required to
         file information with the SEC pursuant to the Exchange Act, file with
         the Trustee, within 15 days after the Partnership is required to file
         with the SEC, copies of the annual reports and of the information,
         documents and other reports which the Partnership may be required to
         file with the SEC pursuant to the Exchange Act; or if the Partnership
         is not required to file information with the SEC pursuant to the
         Exchange Act, file with the Trustee and the SEC in accordance with
         rules and regulations prescribed from time to time by the SEC any
         supplementary and periodic information, documents and reports which may
         be required pursuant to the Exchange Act, in respect of a security
         listed and registered on a national securities exchange as may be
         prescribed in such rules and regulations.

                           (ii) Transmit within 30 days after the filing thereof
         with the Trustee, in the manner and to the extent provided in Section
         313(c) of the Trust Indenture Act, such summaries of any information,
         documents and reports required to be filed by the Partnership pursuant
         to paragraph (i) of this Section as may be required by rules and
         regulations prescribed from time to time by the SEC.

                  (b) For so long as any Initial Notes remain outstanding, the
Partnership shall furnish to the Holders and to securities analysts and
prospective investors, upon their request, the information required to be
delivered pursuant to Rule 144A(d)(4) under the Securities Act.

                  (c) Delivery of such reports, information and documents to the
Trustee is for informational purposes only and the Trustee's receipt of such
shall not constitute constructive notice of any information contained therein or
determinable from information contained therein, including the Partnership's
compliance with any of its covenants hereunder (as to which the Trustee is
entitled to rely exclusively on Officers' Certificates).

SECTION 4.04 Statement by Officers as to Default.

         The Partnership will deliver to the Trustee, within 150 days after the
end of each fiscal year of the Partnership ending after the date hereof, an
Officers' Certificate, stating whether or not to the best knowledge of the
signers thereof the Partnership or the Guarantor is in default in the
performance and observance of any of the terms, provisions and conditions of
this Indenture (without regard to any period of grace or requirement of notice
provided hereunder) and, if the Partnership or the Guarantor shall be in
default, specifying all such defaults and the nature and status thereof of which
they may have knowledge.

                                      -33-
<PAGE>

SECTION 4.05 Existence.

         Subject to Article 5, the Partnership will do or cause to be done all
things necessary to preserve and keep in full force and effect its existence,
rights (charter and statutory) and franchises; provided, however, that the
Partnership shall not be required to preserve any such right or franchise if it
shall determine that the preservation thereof is no longer desirable in the
conduct of the business of the Partnership.

SECTION 4.06 Limitations on Liens.

         The Partnership will not, nor will it permit any Subsidiary of the
Partnership to, issue, create, assume or guarantee any Indebtedness of the
character specified in clause (i)(A) of the definition of the term
"Indebtedness" secured by a Lien upon any Property or upon any Capital Interests
or indebtedness of any Subsidiary that owns or leases any Property (whether such
Property, Capital Interests or Indebtedness is existing or owned on the date of
this Indenture or is hereafter created or acquired), without in any such case
making effective provision whereby all of the Notes outstanding hereunder shall
be secured equally and ratably with, or prior to, such Indebtedness so long as
such Indebtedness shall be so secured. This restriction shall not apply to (1)
any Permitted Lien and (2) any Lien securing Exempted Indebtedness.

SECTION 4.07 Restriction of Sale-Leaseback Transactions.

         The Partnership will not, nor will it permit any Subsidiary to, engage
in a Sale-Leaseback Transaction with respect to any Property unless:

                           (i) the Partnership or such Subsidiary, as the case
         may be, would be entitled to incur Indebtedness of the character
         specified in clause (i)(A) of the definition of the term "Indebtedness"
         secured by a Lien on the Property to be leased pursuant to such
         Sale-Leaseback Transaction in a principal amount at least equal to the
         Attributable Indebtedness with respect to such Sale-Leaseback
         Transaction without securing the Notes pursuant to Section 4.06; or

                           (ii) within a one-year period after the effective
         date of such Sale-Leaseback Transaction, the Partnership or such
         Subsidiary applies or causes to be applied an amount equal to not less
         than the Attributable Indebtedness of such Sale-Leaseback Transaction
         to (a) the voluntary defeasance or the repayment, redemption or
         retirement of the Notes or other Indebtedness of the Partnership or any
         Subsidiary of the character specified in clause (i)(A) of the
         definition of the terms "Indebtedness" that matures more than one year
         after the creation of such Indebtedness, (b) the acquisition,
         construction, development or improvement of any Property used or useful
         in the business of the Partnership or any of its Subsidiaries, or (c)
         any combination of applications referred to sub-clauses (a) and (b) of
         this clause (ii).

                                      -34-
<PAGE>

SECTION 4.08 Waiver of Certain Covenants.

         The Partnership may omit in any particular instance to comply with any
term, provision or condition set forth in Section 4.05, 4.06 or 4.07 with
respect to the Notes or any negative covenant with respect to the Notes
contained in resolutions of the Partnership Policy Committee, Officers'
Certificate or supplemental indenture authorizing the Notes if before the time
for such compliance the Holders of at least a majority in aggregate principal
amount of the Notes (voting as one class) shall, by act of such Holders, either
waive such compliance in such instance or generally waive compliance with such
term, provision or condition, but no such waiver shall extend to or affect such
term, provision or condition except to the extent so expressly waived, and,
until such waiver shall become effective, the obligations of the Partnership and
the Guarantor and the duties of the Trustee in respect of any such term,
provision or condition shall remain in full force and effect.

         A waiver which changes or eliminates any term, provision or condition
of this Indenture which has expressly been included solely for the benefit of
the Holders, or which modifies the rights of the Holders with respect to such
term, provision or condition, shall be deemed not to affect the rights under
this Indenture of the Holders.

SECTION 4.09 Payments for Consent.

         The Partnership will not, and will not permit any of its Subsidiaries
to, directly or indirectly, pay or cause to be paid any consideration, whether
by way of interest, fee or otherwise, to or for the benefit of any Holder of
Notes for or as an inducement to any consent, waiver or amendment of any of the
terms or provisions of this Indenture or the Notes unless such consideration is
offered to be paid and is paid to all Holders of the Notes that consent, waive
or agree to amend in the time frame set forth in the solicitation documents
relating to such consent, waiver or agreement.

SECTION 4.10 Money for Note Payments to Be Held in Trust.

         If the Partnership shall at any time act as its own Paying Agent with
respect to the Notes, it will, on or before each due date of the principal of,
premium, if any, or Liquidated Damages, if any, or interest on the Notes,
segregate and hold in trust for the benefit of the Persons entitled thereto a
sum sufficient to pay the principal of, premium, if any, and Liquidated Damages,
if any, and interest 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 Partnership shall have one or more Paying Agents for the
Notes, it will, on or prior to each due date of the principal of, premium, if
any, or Liquidated Damages, if any, or interest on the Notes, deposit with a
Paying Agent a sum sufficient to pay such amount, such sum to be held as
provided by the Trust Indenture Act, and (unless such Paying Agent is the
Trustee) the Partnership will promptly notify the Trustee of its action or
failure so to act.

         The Partnership will cause each Paying Agent for the Notes 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 the principal of (and premium, if any), Liquidated Damages, if any,
or interest, if any,

                                      -35-
<PAGE>

on the Notes 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 Partnership (or any other
obligor upon the Notes) in the making of any payment of principal (and premium,
if any), Liquidated Damages, if any, or interest, if any, on the Notes; and (3)
during the continuance of any such default, upon the written request of the
Trustee, forthwith pay to the Trustee all sums held in trust by such Paying
Agent for payment in respect of the Notes.

         The Partnership may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Partnership Order direct any Paying Agent to pay, to the Trustee all sums
held in trust by the Partnership or such Paying Agent, such sums to be held by
the Trustee upon the same trusts as those upon which such sums were held by the
Partnership 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 money.

         Any money deposited with the Trustee or any Paying Agent, or then held
by the Partnership, in trust for the payment of the principal of or any premium,
Liquidated Damages, if any, or interest on any of the Notes and remaining
unclaimed for two years after such principal, premium, if any, or Liquidated
Damages, if any, or interest has become due and payable shall be paid to the
Partnership on Partnership Request, or (if then held by the Partnership) shall
be discharged from such trust; and the Holder of such Notes shall thereafter, as
an unsecured general creditor, look only to the Partnership for payment thereof,
and all liability of the Trustee or such Paying Agent with respect to such trust
money, and all liability of the Partnership 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 Partnership cause
to be published once, in an Authorized Newspaper in each Place of Payment with
respect to the Notes, 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 Partnership.

SECTION 4.11 Repurchase Upon a Rating Decline.

                  (a) If a Rating Decline occurs and an Investment Grade rating
has not been reinstated within 40 days after such occurrence, the Partnership
shall make an offer (a "Rating Decline Offer") to repurchase all or any part
(equal to $1,000 or an integral multiple thereof) of each Holder's Notes at an
offer price in cash equal to 100% of the aggregate principal amount thereof,
plus accrued and unpaid interest and Liquidated Damages, if any, thereon to the
date of repurchase (the "Rating Decline Payment"). Within 10 days following any
Rating Decline, the Partnership shall mail an initial notice to each Holder and
the Trustee stating a Rating Decline has occurred and a repurchase of the Notes
by the Partnership may be required. If within 30 days following such initial
notice, the Rating Agency or Agencies which downgraded the Notes shall have
failed to reinstate an Investment Grade rating to the Notes, then the
Partnership shall, on the 40th day following such Rating Decline, mail a
subsequent notice to each Holder with a copy to the Trustee stating that: (1) an
Investment Grade rating of the Notes has not been reinstated and that such
Holder has the right to require the Partnership to repurchase such Holder's
notes at a repurchase price in cash equal to 100% of the principal amount
thereof plus accrued and unpaid interest and Liquidated Damages, if any, to the
date of repurchase (the "Repurchase Date"); (2) the Repurchase Date, which shall
be a

                                      -36-
<PAGE>

Business Day and be not earlier than 30 days or later than 60 days from the date
the initial notice is mailed; (3) interest on any Note not tendered will
continue to accrue; (4) interest on any Note accepted for payment in a Rating
Decline Offer shall cease to accrue after the Repurchase Date; (5) Holders
electing to have a note purchased will be required to surrender the Note with
the form entitled "Option of Holder to Elect Purchase" on the reverse of the
Note completed, to the Paying Agent at the address specified in the notice prior
to the close of business on the Repurchase Date; (6) Holders will be entitled to
withdraw their election if the Paying Agent receives, not later than the close
of business on the third Business Day, or such shorter periods as may be
required by applicable law, preceding the repurchase date, a telegram, facsimile
transmission or letter setting forth the name of the Holder, the principal
amount of notes the Holder delivered for purchase, and a statement that such
Holder is withdrawing his election to have such Notes purchased; and (7) Holders
which elect to have their notes purchased only in part will be issued new Notes
in a principal amount equal to the unpurchased portion of the Notes surrendered.
If any of the Notes subject to a Rating Decline Offer are in the form of a
Global Note, then the Partnership shall modify such notice to the extent
necessary to accord with the procedures of the Depositary applicable to
repurchases. Further, the Partnership and the Guarantor shall comply with the
requirements of Rule 14e-1 under the Exchange Act and any other securities laws
and regulations thereunder to the extent such laws and regulations are
applicable in connection with the repurchase of Notes in accordance with this
Section 4.11.

                  (b) On or before 10:00 a.m. New York time on the Repurchase
Date, the Partnership shall, to the extent lawful, (a) accept for payment all
Notes or portions thereof properly tendered pursuant to the Rating Decline
Offer, (b) deposit with the Paying Agent an amount equal to the Rating Decline
Payment in respect of all Notes or portions thereof so tendered and (c) deliver
or cause to be delivered to the Trustee the Notes so accepted together with an
Officers' Certificate stating the aggregate principal amount of Notes or
portions thereof being purchased by the Partnership. The Paying Agent shall
promptly mail to each holder of Notes so tendered the Rating Decline Payment for
such Notes, and the Trustee shall promptly authenticate and mail (or cause to be
transferred by book entry) to each Holder a new Note equal in principal amount
to any unpurchased portion of the Notes surrendered, if any; provided, however,
that each such new Note will be in a principal amount of $1,000 or an integral
multiple thereof. The Partnership shall publicly announce the results of the
Rating Decline Offer on or as soon as practicable after the Repurchase Date.

                                    ARTICLE V

                                   SUCCESSORS

SECTION 5.01 Partnership and Guarantor May Consolidate, Etc., Only on Certain
             Terms.

         Except as provided in Section 5.02, neither the Partnership nor the
Guarantor shall merge, amalgamate or consolidate with or into any other Person
(other than a merger or amalgamation with any Subsidiary of the Partnership or
the Guarantor, as the case may be, in which the Partnership or the Guarantor is
the surviving entity) or sell, convey, lease, transfer or otherwise dispose of
its

                                      -37-
<PAGE>

properties and assets as, or substantially as, an entirety to, any Person,
whether in a single transaction or series of related transactions, unless:

                  (a) (A) in the case of a merger, the Partnership or the
Guarantor, as the case may be, is the surviving entity, or (B) the Person formed
by such consolidation or amalgamation or into which the Partnership or the
Guarantor is merged or amalgamated or the Person which acquires by sale,
conveyance, transfer or disposition, or which leases, all or substantially all
of the properties and assets of the Partnership or the Guarantor (i) is an
entity organized under the laws of the United States, a state thereof or the
District of Columbia, or Canada or a province thereof and (ii) shall expressly
assume, by an indenture supplemental hereto, executed and delivered to the
Trustee, in form reasonably satisfactory to the Trustee, the due and punctual
payment of the principal of, premium, if any, and Liquidated Damages, if any,
and interest on all the Notes and the performance or observance of every other
covenant and condition of this Indenture on the part of the Partnership or the
Guarantor, as the case may be, to be performed or observed;

                  (b) immediately before and immediately after giving effect to
such transaction, no Default or Event of Default has occurred and is continuing;
and

                  (c) the Partnership has delivered to the Trustee an Officers'
Certificate and an Opinion of Counsel, each stating that such merger,
amalgamation, consolidation, sale, conveyance, transfer, lease or other
disposition and the supplemental indenture required in connection with such
transaction, if any, comply with this Article and that all conditions precedent
herein provided for relating to such transaction have been complied with.

SECTION 5.02 Successor Substituted.

         Upon any consolidation of the Partnership or the Guarantor with, or
merger of the Partnership or Guarantor into, any other Person or any sale,
transfer, lease or other disposition of the properties and assets of the
Partnership or the Guarantor as, or substantially as, an entirety in accordance
with Section 5.01, the successor Person formed by such consolidation or into
which the Partnership or the Guarantor is merged or to which such sale,
transfer, lease or other disposition is made shall succeed to, and be
substituted for, and may exercise every right and power of, the Partnership or
the Guarantor under this Indenture with the same effect as if such successor
Person had been named originally as the Partnership or Guarantor herein, and
thereafter, except in the case of a lease, the predecessor Person shall be
relieved of all obligations and covenants under this Indenture and the Notes.

                                   ARTICLE VI

                              DEFAULTS AND REMEDIES

SECTION 6.01 Events of Default.

         "Event of Default", wherever used herein with respect to the Notes,
means any one of the following events (whatever the reason for such Event of
Default and whether it shall be voluntary

                                      -38-
<PAGE>

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):

                  (a) default in the payment of any interest or any Liquidated
Damages upon the Notes when it becomes due and payable, and continuance of such
default for a period of 30 days; or

                  (b) default in the payment of the principal of (or premium, if
any, on), the Notes at their Stated Maturity; or

                  (c) default in the performance, or breach, of any term,
covenant or warranty of the Partnership or the Guarantor in this Indenture, and
continuance of such default or breach for a period of 90 days after there has
been given, by registered or certified mail, to the Partnership or the Guarantor
by the Trustee or to the Partnership or the Guarantor and the Trustee by the
Holders of at least 25% in principal amount of the Notes then outstanding 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

                  (d) the Partnership pursuant to or within the meaning of the
Bankruptcy Code (A) commences a voluntary case, (B) consents to the entry of any
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

                  (e) a court of competent jurisdiction enters an order or
decree under the Bankruptcy Code that (A) is for relief against the Partnership
in an involuntary case, (B) appoints a Custodian of the Partnership or for all
or substantially all of its property, or (C) orders the liquidation of the
Partnership; and the order or decree remains unstayed and in effect for 90 days;
or

                  (f) any default by the Partnership or any of its Subsidiaries
in the payment, at the final maturity date and after the expiration of any
applicable grace period, of principal of, premium, if any, or interest on
indebtedness for money borrowed in the principal amount then outstanding of
$25,000,000 or more, or acceleration of any indebtedness of such amount, such
that the indebtedness becomes due and payable prior to its maturity date and
such acceleration is not rescinded within 60 days after notice to the
Partnership in accordance with this Indenture.

SECTION 6.02 Acceleration of Maturity; Rescission and Annulment.

         If an Event of Default with respect to the Notes occurs and is
continuing (other than an Event of Default described in clause (d) or (e) of
Section 6.01), then in every such case the Trustee or the Holders of not less
than 25% in principal amount of the Notes may declare the principal amount of
the Notes to be due and payable immediately, by a notice in writing to the
Partnership (and to the Trustee if given by Holders), and upon any such
declaration such principal amount (or specified amount) shall become immediately
due and payable. Notwithstanding the foregoing, if an Event of Default specified
in clause (d) or (e) of Section 6.01 occurs, Notes then outstanding shall be due
and payable immediately without further action or notice.

                                      -39-
<PAGE>

         At any time after such a declaration of acceleration with respect to
the Notes 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 notes then outstanding, by
written notice to the Partnership and the Trustee, may rescind and annul such
declaration and its consequences if

                  (a) the Partnership has paid or deposited with the Trustee a
sum sufficient to pay

                      (A) all overdue interest on all the Notes,

                      (B) the principal of (and premium, if any, on) and
         Liquidated Damages, if any, on the Notes which have become due
         otherwise than by such declaration of acceleration and any interest
         thereon at the rate or rates prescribed therefor in the Notes,

                      (C) to the extent that payment of such interest is lawful,
         interest upon overdue interest at the rate or rates prescribed therefor
         in the Notes, 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

                  (b) all Events of Default with respect to the Notes, other
than the non-payment of the principal of the Notes which have become due solely
by such declaration of acceleration, have been cured or waived as provided for
below.

         If an Event of Default occurs and is not subsequently cured, the
Trustee shall, in the exercise of its power, use the degree of care of a prudent
man in the conduct of his affairs.

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

SECTION 6.03 Collection of Indebtedness and Suits for Enforcement by Trustee.

         The Partnership covenants that if

                  (a) default is made in the payment of any interest on the
Notes when such interest becomes due and payable and such default continues for
a period of 30 days, or

                  (b) default is made in the payment of the principal of (or
premium, if any, on) and Liquidated Damages, if any, on the Notes at the
maturity date thereof,

the Partnership will, upon demand of the Trustee, pay to it, for the benefit of
the Holders of the Notes, the whole amount then due and payable on the Notes for
principal, premium, if any, and Liquidated Damages, if any, and interest and, to
the extent that payment of such interest shall be legally enforceable, interest
on any overdue principal and premium, Liquidated Damages and on any

                                      -40-
<PAGE>

overdue interest, at the rate or rates prescribed therefor in the Notes, 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 Partnership 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, may prosecute such proceeding to judgment or final decree and may
enforce the same against the Partnership, the Guarantor or any other obligor
upon the Notes and collect the moneys adjudged or decreed to be payable in the
manner provided by law out of the property of the Partnership, the Guarantor or
any other obligor upon the Notes, wherever situated.

         If an Event of Default with respect to the Notes occurs and is
continuing, the Trustee may in its discretion proceed to protect and enforce its
rights and the rights of the Holders of the Notes 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 6.04 Trustee May File Proofs of Claim.

         In case of any judicial proceeding relative to the Partnership, the
Guarantor or any other obligor upon the Notes, their property or their
creditors, the Trustee shall be entitled and empowered, by intervention in such
proceeding or otherwise, to take any and all actions authorized under the Trust
Indenture Act in order to have claims of the Holders and the Trustee allowed in
any such proceeding. In particular, the Trustee shall be authorized 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 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 it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.07 hereof.

         No provision of this Indenture shall be deemed to authorize the Trustee
to authorize or consent to or accept or adopt on behalf of any Holder any plan
of reorganization, arrangement, adjustment or composition affecting the Notes or
the rights of any Holder thereof or to authorize the Trustee to vote in respect
of the claim of any Holder in any such proceeding; provided, however, that the
Trustee may, on behalf of the Holders, vote for the election of a trustee in
bankruptcy or similar official and be a member of a creditors' committee or
other similar committee.

SECTION 6.05 Trustee May Enforce Claims Without Possession of Notes.

         All rights of action and claims under this Indenture or the Notes may
be prosecuted and enforced by the Trustee without the possession of any of the
Notes or the production thereof in any proceeding relating thereto, and any such
proceeding instituted by the Trustee shall be brought in its

                                      -41-
<PAGE>

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 Notes in respect of which such judgment
has been recovered.

SECTION 6.06 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, premium, if
any, or Liquidated Damages, if any, or interest, upon presentation of the Notes
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 under Section
7.07;

         SECOND: To the payment of the amounts then due and unpaid for principal
of, premium, if any, and Liquidated Damages, if any, and interest on the Notes,
ratably, without preference or priority of any kind, according to the amounts
due and payable on the Notes for principal, premium, if any, and Liquidated
Damages, if any, and interest, respectively; and

         THIRD: The balance, if any, to the Partnership.

SECTION 6.07 Limitation on Suits.

         No Holder of the Notes 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

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

                  (b) the Holders of not less than 25% in principal amount of
the Notes then outstanding 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;

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

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

                  (e) 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 Notes then outstanding;

                                      -42-
<PAGE>

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 of such
Holders.

SECTION 6.08 Unconditional Right of Holders to Receive Principal, Premium,
             Liquidated Damages and Interest.

         Notwithstanding any other provision in this Indenture, Holders shall
have the right, which is absolute and unconditional, to receive payment of the
principal of, premium, if any, and Liquidated Damages, if any, and (subject to
Sections 2.06 and the provisions hereof regarding the payment of interest)
interest on the Notes on the maturity date expressed in the Notes (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 6.09 Restoration of Rights and Remedies.

         If the Trustee or any Holder 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, subject to any
determination in such proceeding, the Partnership, the Guarantor, the Trustee
and the Holders shall 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 6.10 Rights and Remedies Cumulative.

         Except as otherwise provided with respect to the replacement or payment
of mutilated, destroyed, lost or stolen Notes herein, no right or remedy herein
conferred upon or reserved to the Trustee or to the Holders 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 6.11 Delay or Omission Not Waiver.

         No delay or omission of the Trustee or of any Holder 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, as the case may be.

                                      -43-

<PAGE>

SECTION 6.12 Control by Holders.

         The Holders of a majority in aggregate principal amount of the Notes
shall have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Trustee, or exercising any trust or
power conferred on the Trustee, with respect to the Notes; provided, however,
that

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

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

                  (c) subject to the provisions of Section 7.01, the Trustee
shall have the right to decline to follow any such direction if the Trustee in
good faith shall determine that the proceeding so directed would involve the
Trustee in personal liability.

SECTION 6.13 Waiver of Past Defaults.

         The Holders of a majority in aggregate principal amount of the Notes
may on behalf of the Holders of all the Notes waive any past default hereunder
and its consequences, except

                  (a) a continuing default in the payment of the principal of,
premium, if any, or Liquidated Damages, if any, or interest on the Notes, or

                  (b) a default in respect of a covenant or provision hereof
which cannot be modified or amended hereunder without the consent of each
Holder.

         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 impair any right consequent thereon.

SECTION 6.14 Undertaking for Costs.

         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, suffered or
omitted by it as Trustee, a court may require any party litigant in such suit to
file an undertaking to pay the costs of such suit, and may assess reasonable
costs, including reasonable legal fees and expenses, against any such party
litigant, in the manner and to the extent provided in the Trust Indenture Act;
provided, however, that neither this Section nor the Trust Indenture Act shall
be deemed to authorize any court to require such an undertaking or to make such
an assessment in any suit instituted by the Partnership or the Trustee.

                                      -44-
<PAGE>

SECTION 6.15 Waiver of Usury, Stay or Extension Laws.

         The Partnership 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 Partnership (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.

                                   ARTICLE VII

                                     TRUSTEE

SECTION 7.01 Certain Duties and Responsibilities.

                  (a) If an Event of Default has occurred and is continuing, the
Trustee shall exercise such of the rights and powers vested in it by this
Indenture, and use the same degree of care and skill in its exercise, as a
prudent man would exercise or use under the circumstances in the conduct of his
own affairs.

                  (b) Except during the continuance of an Event of Default:

                      (i) the duties of the Trustee shall be determined solely
         by the express provisions of this Indenture and the Trustee need
         perform only those duties that are specifically set forth in this
         Indenture and no others, and no implied covenants or obligations shall
         be read into this Indenture against the Trustee; and

                      (ii) in the absence of bad faith on its part, the Trustee
         may conclusively rely, as to the truth of the statements and the
         correctness of the opinions expressed therein, upon certificates or
         opinions furnished to the Trustee and conforming to the requirements of
         this Indenture. However, in the case of any such certificates or
         opinions which by any provision hereof are specifically required to be
         furnished to the Trustee, the Trustee shall be under a duty to examine
         the same to determine whether or not they conform to the requirements
         of this Indenture (but need not confirm or investigate the accuracy of
         mathematical calculations or other facts stated therein).

                  (c) The Trustee may not be relieved from liabilities for its
own negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

                      (i) this paragraph does not limit the effect of paragraph
         (b) of this Section;

                      (ii) the Trustee shall not be liable for any error of
         judgment made in good faith by a Responsible Officer, unless it is
         proved that the Trustee was negligent in ascertaining the pertinent
         facts; and

                                      -45-
<PAGE>

                      (iii) the Trustee shall not be liable with respect to any
         action it takes or omits to take in good faith in accordance with a
         direction received by it pursuant to Section 6.12 hereof.

                  (d) Whether or not therein expressly so provided, every
provision of this Indenture that in any way relates to the Trustee is subject to
paragraphs (a), (b), and (c) of this Section.

                  (e) No provision of this Indenture shall require the Trustee
to expend or risk its own funds or incur any liability.

                  (f) The Trustee shall not be liable for interest on any money
received by it except as the Trustee may agree in writing with the Partnership.
Money held in trust by the Trustee need not be segregated from other funds
except to the extent required by law.

SECTION 7.02 Notice of Defaults.

         If a Default occurs and is continuing with respect to the Notes, the
Trustee shall, within 90 days after it occurs, transmit, in the manner and to
the extent provided in Section 313(c) of the Trust Indenture Act, notice of all
uncured or unwaived Defaults actually known to it; provided, however, that,
except in the case of a Default in payment of the principal of or interest on
the Notes, the Trustee may withhold the notice if and so long as the board of
directors, the executive committee or a trust committee of its directors and/or
its Responsible Officers in good faith determines that withholding such notice
is in the interests of Holders; provided further, however, that, in the case of
any default or breach of the character specified in Section 6.01(c) with respect
to the Notes, no such notice to Holders shall be given until at least 60 days
after the occurrence thereof.

SECTION 7.03 Certain Rights of Trustee.

         Subject to the provisions of Section 7.01:

                  (a) the Trustee may conclusively rely on 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, other evidence of indebtedness or other paper or
document reasonably believed by it to be genuine and to have been signed or
presented by the proper party or parties;

                  (b) any request, direction, order or demand of the Partnership
mentioned herein shall be sufficiently evidenced by a Partnership Request or
Partnership Order (other than delivery of any Security to the Trustee for
authentication and delivery pursuant to Section 2.02, which shall be
sufficiently evidenced as provided therein) and any resolution of the
Partnership Policy Committee shall be sufficiently evidenced;

                  (c) 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

                                      -46-
<PAGE>

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;

                  (d) the Trustee may consult with counsel of its selection 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;

                  (e) 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 pursuant to this Indenture, unless such Holders
shall have offered to the Trustee security or indemnity satisfactory to it
against the costs, expenses and liabilities which might be incurred by it in
compliance with such request or direction;

                  (f) 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, other evidence of indebtedness 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;

                  (g) 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;

                  (h) the Trustee may request that the Partnership deliver an
Officers' Certificate setting forth the names of individuals and/or titles of
officers authorized at such time to take specified actions pursuant to this
Indenture, which Officers' Certificate may be signed by any person authorized to
sign an Officers' Certificate, including any person specified as so authorized
in any such certificate previously delivered and not superseded;

                  (i) the Trustee shall not be liable for any action taken,
suffered, or omitted to be taken 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;

                  (j) the Trustee shall not be deemed to have notice of any
Default or Event of Default unless a Responsible Officer of the Trustee has
actual knowledge thereof or unless written notice of any event which is in fact
such a default is received by the Trustee at the Corporate Trust Office of the
Trustee, and such notice references the Notes and this Indenture; and

                  (k) the rights, privileges, protections, immunities and
benefits given to the Trustee, including, without limitation, its right to be
indemnified, are extended to, and shall be enforceable by, the Trustee in each
of its capacities hereunder, and to each agent, custodian and other Person
employed to act hereunder.

                                      -47-
<PAGE>

SECTION 7.04 Not Responsible for Recitals or Issuance of Notes.

         The recitals contained herein and in the Notes, except the Trustee's
certificates of authentication, shall be taken as the statements of the
Partnership, and the Trustee or any Authenticating Agent assumes no
responsibility for their correctness. Neither the Trustee nor any Authenticating
Agent makes any representations as to the validity or sufficiency of this
Indenture or of the Notes. The Trustee or any Authenticating Agent shall not be
accountable for the use or application by the Partnership of Notes or the
proceeds thereof.

SECTION 7.05 May Hold Notes.

         The Trustee, any Authenticating Agent, any Paying Agent, any Registrar
or any other agent of the Partnership, in its individual or any other capacity,
may become the owner or pledgee of Notes and, subject to Sections 7.08 and 7.13,
may otherwise deal with the Partnership with the same rights it would have if it
were not Trustee, Authenticating Agent, Paying Agent, Registrar or such other
agent.

SECTION 7.06 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 in writing with the Partnership.

SECTION 7.07 Compensation and Reimbursement.

         The Partnership and the Guarantor jointly and severally agree:

                  (a) to pay to the Trustee from time to time such compensation
as shall be agreed in writing from time to time between the Partnership and the
Trustee for all services rendered by it hereunder (which compensation shall not
be limited by any provision of law in regard to the compensation of a trustee of
an express trust);

                  (b) except as otherwise expressly provided herein, to
reimburse the 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 willful
misconduct; and

                  (c) to indemnify each of the Trustee and any predecessor
Trustee for, and to hold it harmless against, any and all loss, liability,
damages, claim or expense incurred without negligence or bad faith on its 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 (whether asserted by the Partnership, a Holder or another
Person) or liability in connection with the exercise or performance of any of
its powers or duties hereunder, except those attributable to its negligence or
willful misconduct.

                                      -48-
<PAGE>

         The obligations of the Partnership and the Guarantor under this Section
to compensate the Trustee and to pay or reimburse the Trustee for expenses,
disbursements and advances shall constitute additional indebtedness when such
obligations have been past due for 90 days. Such additional indebtedness shall
be secured by a lien prior to that of the Notes upon all property and funds held
or collected by the Trustee as such, except funds held in trust for the benefit
of the Holders of particular Notes.

         Without limiting any rights available to the Trustee under applicable
law, when the Trustee incurs expenses or renders services in connection with an
Event of Default specified in Section 6.01(d) or Section 6.01(e), the expenses
(including the reasonable charges and expenses of its counsel) and the
compensation for such services are intended to constitute expenses of
administration under any applicable provisions of the Bankruptcy Code.

         The provisions of this Section shall survive the satisfaction and
discharge of this Indenture and the defeasance of the Notes.

SECTION 7.08 Disqualification; Conflicting Interests.

         If the Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Trustee shall either eliminate such
interest or resign, to the extent and in the manner provided by, and subject to
the provisions of, the Trust Indenture Act and this Indenture.

SECTION 7.09 Corporate Trustee Required; Eligibility.

         There shall at all times be one Trustee hereunder which shall be a
Person that is eligible pursuant to the Trust Indenture Act to act as such and
has a combined capital and surplus required by the Trust Indenture Act. If such
Person publishes reports of condition at least annually, pursuant to law or to
the requirements of a supervising or examining authority, then for the purposes
of this Section, the combined capital and surplus of such Person 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 7.10 Resignation and Removal; Appointment of Successor.

         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 7.11.

         The Trustee may resign at any time with respect to the Notes by giving
written notice thereof to the Partnership and the Guarantor. If the instrument
of acceptance by a successor Trustee required by Section 7.11 shall not have
been delivered to the Trustee within 30 days after the giving of such notice of
resignation, the resigning Trustee may petition, at the expense of the
Partnership, any court of competent jurisdiction for the appointment of a
successor Trustee with respect to the Notes.

                                      -49-
<PAGE>

         The Trustee may be removed at any time with respect to the Notes by Act
of the Holders of a majority in principal amount of the Notes then outstanding,
delivered to the Trustee and to the Partnership. If the instrument of acceptance
by a successor Trustee required by Section 7.11 shall not have been delivered to
the Trustee within 30 days after the giving of such notice of removal, the
Trustee being removed may petition, at the expense of the Partnership, any court
of competent jurisdiction for the appointment of a successor Trustee with
respect to the Notes.

         If at any time:

                  (1) the Trustee shall fail to comply with Section 7.08 after
written request therefor by the Partnership, the Guarantor, or by any Holder 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 7.09
and shall fail to resign after written request therefor by the Partnership, the
Guarantor, or by any such Holder, 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, (A) the Partnership may remove the Trustee, or (B)
subject to Section 6.14, any Holder who has been a bona fide Holder of a
Security for at least six months may, on behalf of himself and all others
similarly situated, petition any court of competent jurisdiction for the removal
of the Trustee with respect to all Notes and the appointment of a successor
Trustee or Trustees.

         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 Notes, the Partnership shall promptly appoint a successor Trustee or
Trustees with respect to the Notes (it being understood that any such successor
Trustee may be appointed with respect to the Notes and that at any time there
shall be only one Trustee with respect to the Notes) and shall comply with the
applicable requirements of Section 7.11. If, within one year after such
resignation, removal or incapability, or the occurrence of such vacancy, a
successor Trustee with respect to the Notes shall be appointed by Act of the
Holders of a majority in principal amount of the Notes delivered to the
Partnership, the Guarantor, and the retiring Trustee, the successor Trustee so
appointed shall, forthwith upon its acceptance of such appointment in accordance
with the applicable requirements of Section 7.11, become the successor Trustee
with respect to the Notes and to that extent supersede the successor Trustee
appointed by the Partnership. If no successor Trustee with respect to the Notes
shall have been so appointed by the Partnership or the Holders and accepted
appointment in the manner required by Section 7.11, any Holder who has been a
bona fide Holder of Notes 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 the Notes.

         The Partnership shall give notice of each resignation and each removal
of the Trustee and each appointment of a successor Trustee in the manner
provided in Section 10.02. Each notice shall

                                      -50-
<PAGE>

include the name of the successor Trustee with respect to the Notes and the
address of its Corporate Trust Office.

SECTION 7.11 Acceptance of Appointment by Successor.

             (a) In case of the appointment hereunder of a successor Trustee
with respect to all Notes, every such successor Trustee so appointed shall
execute, acknowledge and deliver to the Partnership, the Guarantor, and to 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 the request of the Partnership, the Guarantor, 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.

             (b) Upon request of any such successor Trustee, the Partnership and
the Guarantor 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) of this Section.

             (c) 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 7.12 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 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 Notes 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 Notes so authenticated with the same effect as if
such successor Trustee had itself authenticated such Notes.

SECTION 7.13 Preferential Collection of Claims Against Partnership.

         If and when the Trustee shall be or become a creditor directly or
indirectly, secured or unsecured, of the Partnership, the Guarantor, or any
other obligor upon the Notes, the Trustee shall be subject to the provisions of
the Trust Indenture Act regarding the collection of claims against the
Partnership, the Guarantor, or any such other obligor.

                                      -51-
<PAGE>

SECTION 7.14 Appointment of Authenticating Agent.

         The Trustee (upon notice to the Partnership and the Guarantor) may
appoint an Authenticating Agent or Agents which shall be authorized to act on
behalf of the Trustee to authenticate the Notes (in accordance with procedures
acceptable to the Trustee) and upon exchange, registration of transfer or
partial redemption thereof or pursuant to Section 2.06, and Notes 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. Wherever reference is made in this Indenture to the authentication
and delivery of Notes 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 Partnership and shall at
all times be a corporation organized and doing business under the laws of the
United States of America, any State thereof 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 authority. If such Authenticating Agent
publishes reports of condition at least annually, pursuant to law or to the
requirements of said 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. If 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 all or substantially all of
the corporate agency or corporate trust business of such 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 any further act on the part of the Trustee or such Authenticating
Agent.

         An Authenticating Agent may resign at any time by giving written notice
thereof to the Trustee, to the Partnership, and to the Guarantor. The Trustee
may at any time terminate the agency of an Authenticating Agent by giving
written notice thereof to such Authenticating Agent, to the Partnership, and to
the Guarantor. 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 may
appoint a successor Authenticating Agent which shall be acceptable to the
Partnership and shall mail written notice of such appointment by first-class
mail, postage prepaid, to all Holders, as their names and addresses appear in
the security register of the Trustee. 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. No successor Authenticating Agent
shall be appointed unless eligible under the provisions of this Section.

                                      -52-
<PAGE>

         The Partnership agrees to pay to each Authenticating Agent from time to
time reasonable compensation for its services under this Section.

         If an appointment is made pursuant to this Section, the Notes may have
endorsed thereon, in addition to the Trustee's certificate of authentication, an
alternative certificate of authentication in the following form:

         This is one of the Notes.

                                      BANK ONE TRUST COMPANY, N.A.

                                      As Trustee

                                      By:
                                         -------------------------------------
                                               As Authenticating Agent

                                      By:
                                         -------------------------------------
                                               Authorized Officer

SECTION 7.15 Reports by Trustee to Holders of the Notes.

         (a) Within 60 days after each May 15 commencing July 15, 2000, the
Trustee shall transmit to Holders such reports concerning the Trustee and its
actions under this Indenture to the extent required pursuant to the Trust
Indenture Act at the times and in the manners provided pursuant thereto.

         (b) A copy of each such report shall, at the time of such transmission
to Holders, be filed by the Trustee with each stock exchange upon which the
Notes are listed, with the Commission and with the Partnership. The Partnership
will promptly notify the Trustee when the Notes are listed on any stock
exchange.

                                  ARTICLE VIII

                    LEGAL DEFEASANCE AND COVENANT DEFEASANCE

SECTION 8.01 Option to Effect Legal Defeasance or Covenant Defeasance.

         The Partnership may, at the option of the Partnership Policy Committee
evidenced by a resolution set forth in an exhibit to an Officers' Certificate,
at any time, elect to have either Section 8.02 or 8.03 hereof be applied to all
outstanding Notes upon compliance with the conditions set forth below in this
Article VIII.

                                      -53-
<PAGE>

SECTION 8.02 Legal Defeasance and Discharge.

         Upon the Partnership's exercise under Section 8.01 hereof of the option
applicable to this Section 8.02, the Partnership shall, subject to the
satisfaction of the conditions set forth in Section 8.04 hereof, be deemed to
have been discharged from its obligations with respect to all outstanding Notes
on the date the conditions set forth below are satisfied (hereinafter, "Legal
Defeasance") except for (i) the rights of Holders of outstanding Notes to
receive payments in respect of the principal of, premium, if any, and interest
and Liquidated Damages, if any, on such Notes when such payments are due from
the trust referred to below, (ii) the Partnership's obligations with respect to
the Notes concerning issuing temporary Notes, registration of Notes, mutilated,
destroyed, lost or stolen Notes and the maintenance of an office or agency for
payment and money for security payments held in trust, (iii) the rights, powers,
trusts, duties and immunities of the Trustee, and the Partnership's and
Guarantor's obligations in connection therewith, (iv) rights of registration of
transfer and exchange of the Notes and the Partnership's optional rights, (v)
the obligations of the Partnership under Section 4.02, (vi) rights of
registration of transfer and exchange of the Notes and the Partnership's
optional right of redemption and (iv) the Legal Defeasance provisions of this
Indenture. For this purpose, Legal Defeasance means that the Partnership, the
Guarantor, and any other obligor on the Notes shall be deemed to have paid and
discharged the entire Indebtedness represented by the outstanding Notes, which
shall thereafter be deemed to be "outstanding" only for the purposes of Section
8.05 hereof and the other Sections of this Indenture referred to in (a) and (b)
below, and to have satisfied all its other obligations under such Notes and this
Indenture (and the Trustee, on demand of and at the expense of the Partnership,
shall execute proper instruments acknowledging the same), except for the
following provisions which shall survive until otherwise terminated or
discharged hereunder: (a) the rights of Holders of outstanding Notes to receive
solely from the trust fund described in Section 8.04 hereof, and as more fully
set forth in such Section, payments in respect of the principal of, premium, if
any, and interest and Liquidated Damages, if any, on such Notes when such
payments are due, (b) the Partnership's obligations with respect to such Notes
under Article II and Section 4.02 hereof, (c) the rights, powers, trusts, duties
and immunities of the Trustee hereunder and the Partnership's obligations in
connection therewith and (d) this Article VIII. Subject to compliance with this
Article VIII, the Partnership may exercise its option under this Section 8.02
notwithstanding the prior exercise of its option under Section 8.03 hereof.

SECTION 8.03 Covenant Defeasance.

         Upon the Partnership's exercise under Section 8.01 hereof of the option
applicable to this Section 8.03, the Partnership and any other obligor,
including the Guarantor, shall, subject to the satisfaction of the conditions
set forth in Section 8.04 hereof, be released from its obligations under the
covenants contained in Sections 4.03, 4.04, 4.06, 4.07 and Article V hereof with
respect to the outstanding Notes on and after the date the conditions set forth
below are satisfied (hereinafter, "Covenant Defeasance"), and the Notes shall
thereafter be deemed 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 such covenants, but shall continue to be deemed
"outstanding" for all other purposes hereunder (it being understood that such
Notes shall not be deemed outstanding for accounting purposes). For this
purpose, Covenant Defeasance means that, with respect to the outstanding Notes,
the Partnership and the Guarantor may omit to comply with and

                                      -54-
<PAGE>

shall have no liability in respect of any term, condition or limitation set
forth in any such covenant, whether directly or indirectly, by reason of any
reference elsewhere herein to any such covenant or by reason of any reference in
any such 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 6.01 hereof, but, except as specified above, the remainder of this
Indenture and such Notes shall be unaffected thereby. In addition, upon the
Partnership's exercise under Section 8.01 hereof of the option applicable to
this Section 8.03 hereof, subject to the satisfaction of the conditions set
forth in Section 8.04 hereof, Sections 6.01(c) through 6.01(g) hereof shall not
constitute Events of Default.

SECTION 8.04 Conditions to Legal or Covenant Defeasance.

         The following shall be the conditions to the application of either
Section 8.02 or 8.03 hereof to the outstanding Notes:

         In order to exercise either Legal Defeasance or Covenant Defeasance:

                  (a) the Partnership must irrevocably deposit with the Trustee,
in trust, for the benefit of the Holders, cash in U.S. dollars, non-callable
Government Securities, or a combination thereof, in such amounts as will be
sufficient, in the opinion of a nationally recognized firm of independent public
accountants, to pay the principal of, premium, if any, and interest and
Liquidated Damages, if any, on the outstanding Notes on the stated maturity or
on the applicable Redemption Date, as the case may be, and the Partnership must
specify whether the Notes are being defeased to maturity or to a particular
Redemption Date;

                  (b) in the case of an election under Section 8.02 hereof, the
Partnership shall have delivered to the Trustee an Opinion of Counsel in the
United States reasonably acceptable to the Trustee confirming that (A) the
Partnership has received from, or there has been published by, the Internal
Revenue Service a ruling or (B) since the date 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 of Counsel shall confirm that, the Holders
of the outstanding Notes will not recognize income, gain or loss for federal
income tax purposes as a result of such Legal 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 Legal Defeasance had not occurred;

                  (c) in the case of an election under Section 8.03 hereof, the
Partnership shall have delivered to the Trustee an Opinion of Counsel in the
United States reasonably acceptable to the Trustee confirming that the Holders
of the outstanding Notes 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;

                  (d) no Default or Event of Default shall have occurred and be
continuing on the date of such deposit (other than a Default or Event of Default
resulting from the borrowing of funds to be applied to such deposit) or insofar
as Section 6.01(d) or 6.01(e) hereof is concerned, at any time in the period
ending on the 91st day after the date of deposit;

                                      -55-
<PAGE>

                  (e) such Legal Defeasance or Covenant Defeasance will not
result in a breach or violation of, or constitute a default under, any material
agreement or instrument (other than this Indenture) to which the Partnership or
any of its Subsidiaries is a party or by which the Partnership or any of its
Subsidiaries is bound;

                  (f) the Partnership shall have delivered to the Trustee an
Opinion of Counsel to the effect that on the 91st day following the deposit, the
trust funds will not be subject to the effect of any applicable bankruptcy,
insolvency, reorganization or similar laws affecting creditors' rights
generally;

                  (g) the Partnership shall have delivered to the Trustee an
Officers' Certificate stating that the deposit was not made by the Partnership
with the intent of preferring the Holders of Notes over the other creditors of
the Partnership with the intent of defeating, hindering, delaying or defrauding
creditors of the Partnership or others; and

                  (h) the Partnership shall have delivered to the Trustee an
Officers' Certificate and an Opinion of Counsel, each stating that all
conditions precedent provided for or relating to the Legal Defeasance or the
Covenant Defeasance have been complied with.

SECTION 8.05 Deposited Money and Government Securities to be Held in Trust;
             Other Miscellaneous Provisions.

         Subject to Section 8.06 hereof, all money and non-callable Government
Securities (including the proceeds thereof) deposited with the Trustee (or other
qualifying trustee, collectively, for purposes of this Section 8.05, the
"Trustee") pursuant to Section 8.04 hereof in respect of the outstanding Notes
shall be held in trust and applied by the Trustee, in accordance with the
provisions of such Notes and this Indenture, to the payment, either directly or
through any Paying Agent (including the Partnership acting as Paying Agent) as
the Trustee may determine, to the Holders of such Notes of all sums due and to
become due thereon in respect of principal, premium, if any, and interest and
Liquidated Damages, if any, but such money need not be segregated from other
funds except to the extent required by law.

         The Partnership shall pay and indemnify the Trustee against any tax,
fee or other charge imposed on or assessed against the cash or non-callable
Government Securities deposited pursuant to Section 8.04 hereof 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 the outstanding Notes.

         Anything in this Article 8 to the contrary notwithstanding, the Trustee
shall deliver or pay to the Partnership from time to time upon the request of
the Partnership any money or non-callable Government Securities held by it as
provided in Section 8.04 hereof which, in the opinion of a nationally recognized
firm of independent public accountants expressed in a written certification
thereof delivered to the Trustee (which may be the opinion delivered under
Section 8.04(h) hereof), are in excess of the amount thereof that would then be
required to be deposited to effect an equivalent Legal Defeasance or Covenant
Defeasance.

                                      -56-
<PAGE>

SECTION 8.06 Repayment to Partnership.

         Any money deposited with the Trustee or any Paying Agent, or then held
by the Partnership, in trust for the payment of the principal of, premium, if
any, or interest and Liquidated Damages, if any, on any Note and remaining
unclaimed for two years after such principal, and premium, if any, or interest
and Liquidated Damages, if any, has become due and payable shall be paid to the
Partnership on its request or (if then held by the Partnership) shall be
discharged from such trust; and the Holder of such Note shall thereafter, as a
secured creditor, look only to the Partnership for payment thereof, and all
liability of the Trustee or such Paying Agent with respect to such trust money,
and all liability of the Partnership 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 Partnership cause to be
published once, in an Authorized Newspaper in each Place of Payment with respect
to the Notes, 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
notification or publication, any unclaimed balance of such money then remaining
will be repaid to the Partnership.

SECTION 8.07 Reinstatement.

         If the Trustee or Paying Agent is unable to apply any U.S. dollars or
non-callable Government Securities in accordance with Section 8.02 or 8.03
hereof, as the case may be, by reason of any order or judgment of any court or
governmental authority enjoining, restraining or otherwise prohibiting such
application, then the Partnership's and the Guarantor's obligations under this
Indenture and the Notes shall be revived and reinstated as though no deposit had
occurred pursuant to Section 8.02 or 8.03 hereof until such time as the Trustee
or Paying Agent is permitted to apply all such money in accordance with Section
8.02 or 8.03 hereof, as the case may be; provided, however, that, if the
Partnership or the Guarantor makes any payment of principal of, premium, if any,
or interest and Liquidated Damages, if any, on any Note following the
reinstatement of its obligations, the Partnership or the Guarantor shall be
subrogated to the rights of the Holders of such Notes to receive such payment
from the money held by the Trustee or Paying Agent.

                                   ARTICLE IX

                        AMENDMENT, SUPPLEMENT AND WAIVER

SECTION 9.01 Without Consent of Holders of Notes.

         Notwithstanding Section 9.02 hereof, the Partnership, the Guarantor and
the Trustee may amend or supplement this Indenture or the Notes without the
consent of any Holder of a Note:

                  (a) to cure any ambiguity, defect or inconsistency;

                  (b) to provide for uncertificated Notes in addition to or in
place of certificated Notes or to alter the provisions of Article II hereof
(including the related definitions) in a manner that does not materially
adversely affect any Holder;

                                      -57-
<PAGE>

                  (c) to provide for the assumption of the Partnership's or the
Guarantor's obligations to the Holders of the Notes in the case of a merger,
consolidation or sale of assets of the Partnership pursuant to Article V hereof;

                  (d) to make any change that would provide any additional
rights or benefits to the Holders of the Notes or that does not adversely affect
the legal rights hereunder of any such Holder;

                  (e) to comply with requirements of the SEC in order to effect
or maintain the qualification of this Indenture under the TIA; or

                  (f) to reflect the release of the Guarantor from its
Guarantee, or the addition of any Holding Subsidiary of the Partnership or any
other Person as a guarantor hereunder, in the manner provided by this Indenture.

         Upon the request of the Partnership accompanied by a resolution of the
Partnership Policy Committee authorizing the execution of any such amended or
supplemental Indenture, and upon receipt by the Trustee of the documents
described in Section 7.03 hereof, the Trustee shall join with the Partnership
and the Guarantor in the execution of any amended or supplemental Indenture
authorized or permitted by the terms of this Indenture and to make any further
appropriate agreements and stipulations that may be therein contained, but the
Trustee shall not be obligated to enter into such amended or supplemental
Indenture that affects its own rights, duties, liabilities or immunities under
this Indenture or otherwise.

SECTION 9.02 With Consent of Holders of Notes.

         Except as provided below in this Section 9.02, the Partnership, the
Guarantor and the Trustee may amend or supplement this Indenture and the Notes
may be amended or supplemented with the consent of the Holders of at least a
majority in principal amount of the Notes then outstanding (including, without
limitation, consents obtained in connection with a tender offer or exchange
offer for the Notes), and, subject to Sections 6.13 and 6.08 hereof, any
existing Default or Event of Default (other than a Default or Event of Default
in the payment of the principal of, premium, if any, or interest and Liquidated
Damages, if any, on the Notes, except a payment default resulting from an
acceleration that has been rescinded) or compliance with any provision of this
Indenture or the Notes may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes (including consents
obtained in connection with a tender offer or exchange offer for the Notes).

         Upon the request of the Partnership accompanied by a resolution of the
Partnership Policy Committee authorizing the execution of any such amended or
supplemental Indenture, and upon the filing with the Trustee of evidence
satisfactory to the Trustee of the consent of the Holders of Notes as aforesaid,
and upon receipt by a Responsible Officer of the Trustee of the documents
described in Section 7.03 hereof, the Trustee shall join with the Partnership
and the Guarantor in the execution of such amended or supplemental Indenture
unless such amended or supplemental Indenture affects the Trustee's own rights,
duties, liabilities or immunities under this Indenture or otherwise, in which
case the Trustee may in its discretion, but shall not be obligated to, enter
into such amended or supplemental Indenture.

                                      -58-
<PAGE>

         It shall not be necessary for the consent of the Holders of Notes under
this Section 9.02 to approve the particular form of any proposed amendment or
waiver, but it shall be sufficient if such consent approves the substance
thereof.

         After an amendment, supplement or waiver under this Section becomes
effective, the Partnership shall mail to the Holders of Notes affected thereby a
notice briefly describing the amendment, supplement or waiver. Any failure of
the Partnership to mail such notice, or any defect therein, shall not, however,
in any way impair or affect the validity of any such amended or supplemental
Indenture or waiver. Subject to Sections 6.13 and 6.08 hereof, the Holders of a
majority in aggregate principal amount of the Notes then outstanding may waive
compliance in a particular instance by the Partnership with any provision of
this Indenture or the Notes. However, without the consent of each Holder
affected, an amendment or waiver may not (with respect to any Notes held by a
nonconsenting Holder):

                  (a) reduce the principal amount of Notes whose Holders must
consent to an amendment, supplement or waiver of any provision of this Indenture
or the Notes;

                  (b) reduce the principal of or change the fixed maturity of
any Note or alter or waive in any manner that adversely affects the rights of
any Holder of Notes any of the provisions with respect to the redemption of the
Notes;

                  (c) reduce the rate of or change the time for payment of
interest, including default interest, or Liquidated Damages, if any, on any
Note;

                  (d) waive a Default or Event of Default in the payment of
principal of or premium, if any, or interest or Liquidated Damages, if any, on
the Notes (except a rescission of acceleration of the Notes by the Holders of at
least a majority in aggregate principal amount of the then outstanding Notes and
a waiver of the payment default that resulted from such acceleration);

                  (e) make any Note payable in money other than that stated in
the Notes;

                  (f) make any change that adversely affects the rights of any
Holder of Notes in the provisions of this Indenture relating to waivers of past
Defaults or make any change to the rights of Holders of Notes to receive
payments of principal of or interest or Liquidated Damages, if any, on the
Notes;

                  (g) waive a redemption payment with respect to any Note; or

                  (h) make any change in Section 6.13 or 6.08 hereof or in the
foregoing amendment and waiver provisions.

SECTION 9.03 Compliance with Trust Indenture Act.

         Every amendment or supplement to this Indenture or the Notes shall be
set forth in a amended or supplemental Indenture that complies with the TIA as
then in effect.

                                      -59-
<PAGE>

SECTION 9.04 Revocation and Effect of Consents.

         Until an amendment, supplement or waiver becomes effective, a consent
to it by a Holder of a Note is a continuing consent by the Holder of a Note and
every subsequent Holder of a Note or portion of a Note that evidences the same
debt as the consenting Holder's Note, even if notation of the consent is not
made on any Note. However, any such Holder of a Note or subsequent Holder of a
Note may revoke the consent as to its Note if the Trustee receives written
notice of revocation before the date the waiver, supplement or amendment becomes
effective. An amendment, supplement or waiver becomes effective in accordance
with its terms and thereafter binds every Holder.

SECTION 9.05 Notation on or Exchange of Notes.

         The Trustee may place an appropriate notation about an amendment,
supplement or waiver on any Note thereafter authenticated. The Partnership, in
exchange for all Notes, may issue and the Trustee shall authenticate new Notes
that reflect the amendment, supplement or waiver.

         Failure to make the appropriate notation or issue a new Note shall not
affect the validity and effect of such amendment, supplement or waiver.

SECTION 9.06 Trustee to Sign Amendments, Etc.

         The Trustee shall sign any amended or supplemental Indenture authorized
pursuant to this Article IX if the amendment or supplement does not adversely
affect the rights, duties, liabilities or immunities of the Trustee. The Trustee
may, but shall not be obligated to, enter into any such supplemental indenture
which affects the Trustee's own rights, duties, liabilities or immunities under
this Indenture or otherwise. The Partnership may not sign an amendment or
supplemental Indenture until the Partnership Policy Committee approves it. In
executing any amended or supplemental indenture, the Trustee shall be entitled
to receive and (subject to Section 7.01 hereof) shall be fully protected in
relying upon, an Officers' Certificate and an Opinion of Counsel stating that
the execution of such amended or supplemental indenture is authorized or
permitted by this Indenture.

                                    ARTICLE X

                                  MISCELLANEOUS

SECTION 10.01 Trust Indenture Act Controls.

         If any provision of this Indenture limits, qualifies or conflicts with
the duties imposed by TIA Section 318(c), the imposed duties shall control.

SECTION 10.02 Notices.

         Any notice or communication by the Partnership or the Trustee to the
others is duly given if in writing and delivered in Person or mailed by first
class mail (registered or certified, return

                                      -60-
<PAGE>

receipt requested), telecopier or overnight air courier guaranteeing next day
delivery, to the others' address:

         If to the Partnership:

                                   Northern Border Partners, L.P.
                                   c/o Northern Plains Natural Gas Company
                                   1111 South 103rd Street
                                   Omaha, Nebraska 68124-1000
                                   Telecopier No.: (402) 398-7871
                                   Attention: Director of Finance

         If to the Trustee:

                                   Bank One Trust Company, N.A
                                   1 Banc One Plaza, Suite IL1-0126
                                   Chicago, Illinois 60670-0126
                                   Telecopier No.: (312) 407-1708
                                   Attention: Corporate Trust Services Division

         The Partnership or the Trustee, by notice to the others may designate
additional or different addresses for subsequent notices or communications.

         All notices and communications (other than those sent to Holders) shall
be deemed to have been duly given: at the time delivered by hand, if personally
delivered; five Business Days after being deposited in the mail, postage
prepaid, if mailed; when answered back; when receipt acknowledged, if
telecopied; and the next Business Day after timely delivery to the courier, if
sent by overnight air courier guaranteeing next day delivery.

         Any notice or communication to a Holder shall be mailed by first class
mail, certified or registered, return receipt requested, or by overnight air
courier guaranteeing next day delivery to its address shown on the register kept
by the Registrar. Any notice or communication shall also be so mailed to any
Person described in TIA Section 313(c), to the extent required by the TIA.
Failure to mail a notice or communication to a Holder or any defect in it shall
not affect its sufficiency with respect to other Holders.

         If a notice or communication is mailed in the manner provided above
within the time prescribed, it is duly given, whether or not the addressee
receives it.

         If the Partnership mails a notice or communication to Holders, it shall
mail a copy to the Trustee and each Agent at the same time.

                                      -61-

<PAGE>

SECTION 10.03 Communication by Holders of Notes with Other Holders of Notes.

         Holders may communicate pursuant to TIA Section 312(b) with other
Holders with respect to their rights under this Indenture or the Notes. The
Partnership, the Trustee, the Registrar and anyone else shall have the
protection of TIA Section 312(c).

SECTION 10.04 Certificate and Opinion as to Conditions Precedent.

         Upon any request or application by the Partnership or the Guarantor to
the Trustee to take any action under this Indenture, the Partnership shall
furnish to the Trustee:

                  (a) an Officers' Certificate in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 10.05 hereof) stating that, in the opinion of the signers, all
conditions precedent and covenants, if any, provided for in this Indenture
relating to the proposed action have been satisfied; and

                  (b) an Opinion of Counsel in form and substance reasonably
satisfactory to the Trustee (which shall include the statements set forth in
Section 10.05 hereof) stating that, in the opinion of such counsel, all such
conditions precedent and covenants have been satisfied.

SECTION 10.05 Statements Required in Certificate or Opinion.

         Each certificate or opinion with respect to compliance with a condition
or covenant provided for in this Indenture (other than a certificate provided
pursuant to TIA Section 314(a)(4)) shall comply with the provisions of TIA
Section 314(e) and shall include:

                  (a) a statement that the Person making such certificate or
opinion has read such covenant or condition;

                  (b) 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;

                  (c) a statement that, in the opinion of such Person, he or she
has made such examination or investigation as is necessary to enable him to
express an informed opinion as to whether or not such covenant or condition has
been satisfied; and

                  (d) a statement as to whether or not, in the opinion of such
Person, such condition or covenant has been satisfied.

SECTION 10.06 Rules by Trustee and Agents.

         The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar or Paying Agent may make reasonable rules and set
reasonable requirements for its functions.

                                      -62-

<PAGE>

SECTION 10.07 Non-Recourse to the General Partners; No Personal Liability of
              Directors, Officers, Employees or Partners.

         Obligations of the Partnership, or the Guarantor, as such, under this
Indenture and the Notes hereunder are non-recourse to the General Partners, and
their respective Affiliates (other than the Partnership and the Guarantor), and
payable only out of cash flow and assets of the Partnership and the Guarantor.
The Trustee, and each Holder of a Note by its acceptance thereof, will be deemed
to have agreed in this Indenture that (1) none of the General Partners nor their
assets (nor any of their respective Affiliates other than the Partnership or the
Guarantor, or their respective assets) shall be liable for any of the
obligations of the Partnership or the Guarantor under this Indenture or such
Notes, and (2) no director, officer, employee, stockholder or unitholder, as
such, of the Partnership, the Guarantor, the Trustee, the General Partners or
any Affiliate of any of the foregoing entities and no member of the Partnership
Policy Committee or the Partnership's Audit Committee shall have any
personal liability in respect of the obligations of the Partnership or the
Guarantor under this Indenture or such Notes by reason of his, her or its
status.

SECTION 10.08 Governing Law.

         THE INTERNAL LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICTS
OF LAWS PRINCIPLES THEREOF, SHALL GOVERN AND BE USED TO CONSTRUE THIS INDENTURE
AND THE NOTES.

SECTION 10.09 No Adverse Interpretation of Other Agreements.

         This Indenture may not be used to interpret any other indenture, loan
or debt agreement of the Partnership or its Subsidiaries or of any other Person.
Any such indenture, loan or debt agreement may not be used to interpret this
Indenture.

SECTION 10.10 Successors.

         All agreements of the Partnership in this Indenture and the Notes shall
bind its successors. All agreements of the Trustee in this Indenture shall bind
its successors.

SECTION 10.11 Severability.

         In case any provision in this Indenture or in the Notes 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 10.12 Counterpart Originals.

         The parties may sign any number of copies of this Indenture. Each
signed copy shall be an original, but all of them together represent the same
agreement.

                                      -63-
<PAGE>

SECTION 10.13 Table of Contents, Headings, Etc.

         The Table of Contents, Cross-Reference Table and Headings of the
Articles and Sections of this Indenture have been inserted for convenience of
reference only, are not to be considered a part of this Indenture and shall in
no way modify or restrict any of the terms or provisions hereof.

SECTION 10.14 Acts of Holders; Record Dates.

         Any request, demand, authorization, direction, notice, consent, waiver
or other action provided or permitted by this Indenture to be given or taken by
Holders may be embodied in and evidenced by (a) one or more instruments of
substantially similar tenor signed (either physically or by means of a facsimile
or an electronic transmission, provided that such electronic transmission is
transmitted through the facilities of a Depositary) by such Holders in person or
by agent duly appointed in writing; (b) the record of the Holders voting in
favor thereof at any meeting of Holders duly called and held in accordance with
the provisions of Article IX, or (c) a combination of such instruments and
record. Except as herein otherwise expressly provided, such action shall become
effective when such instrument or instruments or record are delivered (either
physically or by means of a facsimile or an electronic transmission, provided
that such electronic transmission is transmitted through the facilities of a
Depositary) to the Trustee and, where it is hereby expressly required, to the
Partnership. Such instrument or instruments or 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 of the Holders reflected
by such record. Proof of execution of any such instrument or of a writing
appointing any such agent shall be sufficient for any purpose of this Indenture
and (subject to Section 315 of the Trust Indenture Act) conclusive in favor of
the Trustee and the Partnership, if made in the manner provided in this Section.

         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 manner which the Trustee deems sufficient.

         The ownership, principal amount and serial numbers of Notes held by any
Person, and the date of commencement of such Person's holding the same, shall be
proved by the security register of the Trustee.

         Any request, demand, authorization, direction, notice, consent, waiver
or other action of the Holder of any Note shall bind every future Holder of the
same Note and the Holder of every Note 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 or the Partnership in reliance
thereon, whether or not notation of such action is made upon such Note.

                                      -64-
<PAGE>

         Without limiting the foregoing, a Holder entitled hereunder to give or
take any action hereunder with regard to any particular Note may do so with
regard to all or any part of the principal amount of such Note or by one or more
duly appointed agents each of which may do so pursuant to such appointment with
regard to all or any different part of such principal amount.

         The Partnership may set any day as the record date for the purpose of
determining the Holders entitled to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided or
permitted by this Indenture to be given or taken by Holders, but the Partnership
shall have no obligation to do so. With regard to any record date set pursuant
to this paragraph, the Holders of Notes on such record date (or their duly
appointed agents), and only such Persons, shall be entitled to give or take the
relevant action, whether or not such Holders remain Holders after such record
date.

         The record of any meeting of Holders shall be proved as provided in
Section 11.06.

                                   ARTICLE XI

                          MEETINGS OF HOLDERS OF NOTES

SECTION 11.01 Purposes for Which Meetings May Be Called.

         A meeting of Holders 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 act provided by this
Indenture to be made, given or taken by Holders.

SECTION 11.02 Call, Notice and Place of Meetings.

         (a) The Trustee may at any time call a meeting of Holders for any
purpose specified in Section 11.01, to be held at such time and at such place in
the Borough of Manhattan, The City of New York as the Trustee shall determine.
Notice of every meeting of Holders, setting forth the time and the place of such
meeting and in general terms the action proposed to be taken at such meeting,
shall be given, in the manner provided in Section 10.02, not less than 21 nor
more than 180 days prior to the date fixed for the meeting.

         (b) In case at any time the Partnership (by or pursuant to a resolution
of the Partnership Policy Committee or Officers' Certificate) or the Holders of
at least 10% in principal amount of the Notes then outstanding have requested
the Trustee to call a meeting of the Holders for any purpose specified in
Section 11.01, by written request setting forth in reasonable detail the action
proposed to be taken at the meeting, and the Trustee shall not have mailed
notice of such meeting within 21 days after receipt of such request (whichever
shall be required pursuant to Section 10.02) or shall not thereafter proceed to
cause the meeting to be held as provided herein, then the Partnership or the
Holders 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 for such
meeting and may call such meeting for such purposes by giving notice thereof as
provided in clause (a) of this Section 11.02.

                                      -65-
<PAGE>

SECTION 11.03 Persons Entitled to Vote at Meetings.

         To be entitled to vote at any meeting of Holders, a Person shall be (1)
a Holder of one or more Notes, or (2) a Person appointed by an instrument in
writing as proxy for a Holder or Holders by such Holder or Holders. The only
Persons who shall be entitled to be present or to speak at any meeting of
Holders 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 Partnership and its counsel.

SECTION 11.04 Quorum; Action.

         The presence of Persons holding Notes in an aggregate principal amount
sufficient to take action upon the matter for which such meeting was called
shall constitute a quorum for a meeting of Holders. 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, 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 adjourned
meeting. Notice of the reconvening of any adjourned meeting shall be given as
provided in Section 11.02(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 an adjourned meeting shall state
expressly the percentage, as provided above, of the principal amount of the
Notes that shall constitute a quorum.

         A resolution presented to a meeting or adjourned meeting duly
reconvened at which a quorum is present as aforesaid may be adopted only by the
affirmative vote of the Holders of a majority in principal amount of the Notes;
provided, however, that any resolution with respect to any request, demand,
authorization, direction, notice, consent, waiver or other Act which this
Indenture expressly provides may be made, given or taken by the Holders of a
specified percentage, which is less or more than a majority in principal amount
of the Notes 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 Notes.

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

SECTION 11.05 Determination of Voting Rights; Conduct and Adjournment of
              Meetings.

         (a) Notwithstanding any other provisions of this Indenture, the Trustee
may make such reasonable regulations as it may deem advisable for any meeting of
Holders in regard to proof of the holding of Notes 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 Notes shall be proved in the manner specified in
Section 10.14 and the appointment of any proxy shall be proved in executing the
proxy witnessed or guaranteed by any trust partnership, bank or banker

                                      -66-
<PAGE>

authorized by Section 10.14 to certify to the holding of Notes. 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 10.14
or other proof.

         (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
Partnership, or by Holders as provided in Section 11.02(b), in which case the
Partnership or the Holders 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 Notes represented at the meeting.

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

         (d) Any meeting of Holders duly called pursuant to Section 11.02 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 Notes then outstanding represented
at the meeting; and the meeting may be held as so adjourned without further
notice.

SECTION 11.06 Counting Votes and Recording Action of Meetings.

         The vote upon any resolution submitted to any meeting of Holders shall
be by written ballots on which shall be subscribed the signatures of the Holders
or of their representatives by proxy and the principal amounts and serial
numbers of the Notes 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 triplicate of all
votes cast at the meeting. A record of the proceedings of each meeting of
Holders 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 facts setting forth a copy of the notice of the meeting and
showing that said notice was given as provided in Section 11.02 and, if
applicable, Section 11.04. Such record shall be signed and verified by the
affidavits of the permanent chairman and secretary of the meeting and a copy of
same 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.

                                      -67-
<PAGE>

                                   ARTICLE XII

                               GUARANTEE OF NOTES

SECTION 12.01 Unconditional Guarantee.

         (1) For value received, the Guarantor, hereby fully, unconditionally
and absolutely guarantees (the "Guarantee") to the Holders and to the Trustee
the due and punctual payment of the principal of, and premium, if any, and
interest on the Notes and all other amounts due and payable under this Indenture
and the Notes by the Partnership, when and as such principal, premium, if any,
and interest shall become due and payable, whether at the stated maturity or by
declaration of acceleration, call for redemption or otherwise, according to the
terms of the Notes and this Indenture.

         (2) Failing payment when due of any amount guaranteed pursuant to the
Guarantee, for whatever reason, the Guarantor will be obligated to pay the same
immediately. The Guarantee hereunder is intended to be a general, unsecured,
senior obligation of the Guarantor and will rank pari passu in right of payment
with all Debt of the Guarantor that is not, by its terms, expressly subordinated
in right of payment to the Guarantee of the Guarantor. The Guarantor hereby
agrees that its obligations hereunder shall be full, unconditional and absolute,
irrespective of the validity, regularity or enforceability of the Notes, the
Guarantee or this Indenture, the absence of any action to enforce the same, any
waiver or consent by any Holder of the Notes with respect to any provisions
hereof or thereof, the recovery of any judgment against the Partnership, any
action to enforce the same or any other circumstance which might otherwise
constitute a legal or equitable discharge or defense of the Guarantor. The
Guarantor hereby agrees that in the event of a default in payment of the
principal of, or premium, if any, or interest on the Notes, whether at the
stated maturity or by declaration of acceleration, call for redemption or
otherwise, legal proceedings may be instituted by the Trustee on behalf of the
Holders or, subject to Section 6.07, by the Holders, on the terms and conditions
set forth in this Indenture, directly against the Guarantor to enforce the
Guarantee without first proceeding against the Partnership.

         (3) The obligations of the Guarantor under this Article XII shall be as
aforesaid full, unconditional and absolute and shall not be impaired, modified,
released or limited by any occurrence or condition whatsoever, including,
without limitation, (A) any compromise, settlement, release, waiver, renewal,
extension, indulgence or modification of, or any change in, any of the
obligations and liabilities of the Partnership or the Guarantor contained in the
Notes or this Indenture, (B) any impairment, modification, release or limitation
of the liability of the Partnership, the Guarantor or any of their estates in
bankruptcy, or any remedy for the enforcement thereof, resulting from the
operation of any present or future provision of any applicable Bankruptcy Law,
as amended, or other statute or from the decision of any court, (C) the
assertion or exercise by the Partnership, the Guarantor or the Trustee of any
rights or remedies under the Notes or this Indenture or their delay in or
failure to assert or exercise any such rights or remedies, (D) the assignment or
the purported assignment of any property as security for the Notes, including
all or any part of the rights of the Partnership or the Guarantor under this
Indenture, (E) the extension of the time for payment by the Partnership or the
Guarantor of any payments or other sums or any part thereof owing or payable
under any of the terms and provisions of the Notes or this Indenture or of the
time for performance by the Partnership or the Guarantor of any other
obligations under or arising out of

                                      -68-
<PAGE>

any such terms and provisions or the extension or the renewal of any thereof,
(F) the modification or amendment (whether material or otherwise) of any duty,
agreement or obligation of the Partnership or the Guarantor set forth in this
Indenture, (G) the voluntary or involuntary liquidation, dissolution, sale or
other disposition of all or substantially all of the assets, marshalling of
assets and liabilities, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition or readjustment
of, or other similar proceeding affecting, the Partnership or the Guarantor or
any of its respective assets, or the disaffirmance of the Notes, the Guarantee
or this Indenture in any such proceeding, (H) the release or discharge of the
Partnership or the Guarantor from the performance or observance of any
agreement, covenant, term or condition contained in any of such instruments by
operation of law, (I) the unenforceability of the Notes, the Guarantee or this
Indenture or (J) any other circumstance which might otherwise constitute a legal
or equitable discharge of a surety or guarantor.

         (4) The Guarantor hereby (A) waives diligence, presentment, demand of
payment, filing of claims with a court in the event of the merger, insolvency or
bankruptcy of the Partnership or the Guarantor, and all demands whatsoever, (B)
acknowledges that any agreement, instrument or document evidencing the Guarantee
may be transferred and that the benefit of its obligations hereunder shall
extend to each holder of any agreement, instrument or document evidencing the
Guarantee without notice to them and (C) covenants that its Guarantee will not
be discharged except by complete performance of the Guarantee. The Guarantor
further agrees that if at any time all or any part of any payment theretofore
applied by any person to the Guarantee is, or must be, rescinded or returned for
any reason whatsoever, including without limitation, the insolvency, bankruptcy
or reorganization of the Partnership or the Guarantor, the Guarantee shall, to
the extent that such payment is or must be rescinded or returned, be deemed to
have continued in existence notwithstanding such application, and the Guarantee
shall continue to be effective or be reinstated, as the case may be, as though
such application had not been made.

         (5) The Guarantor shall be subrogated to all rights of the Holders and
the Trustee against the Partnership in respect of any amounts paid by the
Guarantor pursuant to the provisions of this Indenture, provided, however, that
the Guarantor shall be entitled to enforce or to receive any payments arising
out of, or based upon, such right of subrogation until all of the Notes and the
Guarantee shall have been paid in full or discharged.

         (6) A director, officer, employee or unitholder, as such, of the
Guarantor shall not have any liability for any obligations of the Guarantor
under this Indenture or for any claim based on, in respect of or by reason of
such obligations or their creation.

SECTION 12.02 Limitation of Guarantor's Liability.

         The Guarantor and by its acceptance hereof each Holder hereby confirms
that it is the intention of all such parties that the guarantee by the Guarantor
pursuant to its Guarantee not constitute a fraudulent transfer or conveyance for
purposes of any federal, state or foreign law. To effectuate the foregoing
intention, the Holders and the Guarantor hereby irrevocably agree that the
obligations of the Guarantor under its Guarantee shall be limited to the maximum
amount as will, after giving effect to all other contingent and fixed
liabilities of the Guarantor result in the

                                      -69-
<PAGE>

obligations of the Guarantor under its Guarantee not constituting a fraudulent
conveyance or fraudulent transfer under federal, state or foreign law.

SECTION 12.03 Execution and Delivery of Guarantee.

         To further evidence the Guarantee set forth in Section 12.01, the
Guarantor hereby agrees that a notation relating to the Guarantee shall be
endorsed on each Note authenticated and delivered by the Trustee and executed by
either manual or facsimile signature of two officers of the Guarantor.

         The Guarantor hereby agrees that its Guarantee set forth in Section
12.01 shall remain in full force and effect notwithstanding any failure to
endorse on each Note a notation relating to the Guarantee.

         If an officer of the Guarantor whose signature is on this Indenture or
a Note no longer holds that office at the time the Trustee authenticates such
Note or at any time thereafter, the Guarantor's Guarantee of such Note shall be
valid nevertheless.

         The delivery of any Note by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of the Guarantee set forth in
this Indenture on behalf of the Guarantor.

SECTION 12.04 Addition of Guarantors.

                  (1) If any Holding Subsidiary of the Partnership incurs,
creates, assumes or guarantees any Funded Debt other than the Notes at any time
subsequent to the Issue Date (including, without limitation, following any
release of such Holding Subsidiary pursuant to Section 12.05 from the Guarantee
previously provided by it under this Article XII), then the Partnership shall
(A) cause the Notes to be equally and ratably guaranteed by such Holding
Subsidiary, but only to the extent that the Notes are not already guaranteed by
such Holding Subsidiary on reasonably comparable terms and (B) cause such
Holding Subsidiary to execute and deliver a supplemental indenture evidencing
its provision of the Guarantee in accordance with clause (2) below.

                  (2) Any Person that was not the Guarantor on the Issue Date
may become a Guarantor by executing and delivering to the Trustee (A) a
supplemental indenture in form and substance satisfactory to the Trustee, which
subjects such Person to the provisions (including the representations and
warranties) of this Indenture as the Guarantor and (B) an Opinion of Counsel and
Officers' Certificate to the effect that such supplemental indenture has been
duly authorized and executed by such Person and constitutes the legal, valid,
binding and enforceable obligation of such Person (subject to such customary
exceptions concerning creditors' rights and equitable principles as may be
acceptable to the Trustee in its discretion and provided that no opinion need be
rendered concerning the enforceability of the Guarantee).

SECTION 12.05 Release of Guarantee.

         Notwithstanding anything to the contrary in this Article XII, in the
event that the Guarantor shall no longer be a guarantor of any Funded Debt other
than the Notes, and so long as no Default or Event of Default shall have
occurred or be continuing, the Guarantor, upon giving notice to the

                                      -70-
<PAGE>

Trustee to the foregoing effect, shall be deemed to be released from all of its
obligations under this Indenture and the Guarantee shall be of no further force
or effect. Following the receipt by the Trustee of any such notice, the
Partnership shall cause this Indenture to be amended as provided in Section
9.01; provided, however, that the failure to so amend this Indenture shall not
affect the validity of the termination of the Guarantee of the Guarantor.

                          [Signatures Page(s) Follow]

                                      -71-
<PAGE>

                                   SIGNATURES

Dated as of  June 2, 2000

ISSUER:

NORTHERN BORDER PARTNERS, L.P.

By:  /s/ Jerry L. Peters
   -------------------------------------------
     Name:  Jerry L. Peters
     Title:  Chief Financial and Accounting
              Officer

GUARANTOR:

NORTHERN BORDER INTERMEDIATE LIMITED
     PARTNERSHIP

By:  /s/ Jerry L. Peters
   -------------------------------------------
     Name:  Jerry L. Peters
     Title:  Chief Financial and Accounting
              Officer

TRUSTEE:

BANK ONE TRUST COMPANY, N.A.

By:  /s/ John R. Prendiville
   -------------------------------------------
     Name:  John R. Prendiville
     Title:  Authorized Officer

                                      -72-
<PAGE>

                                FORM OF GUARANTEE

     The Guarantor (which term includes any successor person under the
Indenture), has fully, unconditionally and absolutely guaranteed, to the extent
set forth in the Indenture and subject to the provisions in the Indenture, the
due and punctual payment of the principal of, and premium, if any, and interest
on the Notes and all other amounts due and payable under the Indenture and the
Notes by the Partnership.

     The obligations of the Guarantor to the Holders of Notes and to the Trustee
pursuant to the Guarantee and the Indenture are expressly set forth in Article
XII of the Indenture and reference is hereby made to the Indenture for the
precise terms of the Guarantee.

                                                NORTHERN BORDER
                                                INTERMEDIATE
                                                LIMITED PARTNERSHIP

                                                By: /s/ Jerry L. Peters
                                                    ----------------------------
                                                    Name:   Jerry L. Peters
                                                    Title:  Chief Financial and
                                                              Accounting Officer

                                      -73-
<PAGE>

                                                                       EXHIBIT A

                                 (FACE OF NOTE)

                                                              CUSIP: 664785 AA 0

                     87/8% Senior Notes due 2010, [Series A]

No.                                                          $
    -------------                                              ----------------

                         NORTHERN BORDER PARTNERS, L.P.

promises to pay to

or registered assigns,

the principal sum of                                       DOLLARS AND NO CENTS
                     ----------------------------------------------------------

on June 15, 2010.

Interest Payment Dates: June 15 and December 15

Record Dates: June 1 and December 1

                                                 NORTHERN BORDER PARTNERS, L.P.

                                                 By:
                                                    ---------------------------
                                                     Name:
                                                     Title:

This is one of the
Notes referred to in the
within-mentioned Indenture:

                                                 BANK ONE TRUST COMPANY, N.A.
                                                 as Trustee

                                                 By:
                                                    ---------------------------
                                                     Name:
                                                     Title:

Dated:                  , 2000

                                      A-1

<PAGE>

                                 (Back of Note)

                     87/8% Senior Notes due 2010, [Series A]

[Unless and until it is exchanged in whole or in part for Notes in definitive
form, this Note may not be transferred except as a whole by the Depositary to a
nominee of the Depositary or by a nominee of the Depositary to the Depositary or
another nominee of the Depositary or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary. The Depository
Trust Company shall act as the Depositary until a successor shall be appointed
by the Company and the Registrar. Unless this certificate is presented by an
authorized representative of The Depository Trust Company (55 Water Street, New
York, New York) ("DTC"), to the issuer or its agent for registration of
transfer, exchange or payment, and any certificate issued is registered in the
name of Cede & Co. or such other name as may be requested by an authorized
representative of DTC (and any payment is made to Cede & Co. or such other
entity as may be 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.](1)

[THIS NOTE (OR ITS PREDECESSOR) HAS NOT BEEN REGISTERED UNDER THE U.S.
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
SECURITIES LAWS. ACCORDINGLY, THIS NOTE MAY NOT BE OFFERED, SOLD, PLEDGED, OR
OTHERWISE TRANSFERRED WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT OR
BENEFIT OF U.S. PERSONS, EXCEPT AS SET FORTH IN THE NEXT SENTENCE. BY ITS
ACQUISITION HEREOF OR OF A BENEFICIAL INTEREST HEREIN, THE HOLDER:

                   (1) REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL
                  BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) (A
                  "QIB") OR (B) IT IS AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS
                  DEFINED IN RULE 501(A)(1), (2), (3) OR (7) OF REGULATION D
                  UNDER THE SECURITIES ACT (AN "IAI")),

                  (2) AGREES THAT IT WILL NOT RESELL, OR OTHERWISE TRANSFER THIS
                  NOTE EXCEPT (A) TO NORTHERN BORDER PARTNERS, L.P. OR ANY OF
                  ITS SUBSIDIARIES, (B) TO A PERSON WHOM THE SELLER REASONABLY
                  BELIEVES IS A QIB PURCHASING FOR ITS OWN ACCOUNT OR FOR THE
                  ACCOUNT OF A QIB IN A TRANSACTION MEETING THE REQUIREMENTS OF
                  RULE 144A, (C) IN A TRANSACTION MEETING THE REQUIREMENTS OF
                  RULE 144 UNDER THE SECURITIES ACT, (D) TO AN IAI THAT, PRIOR
                  TO SUCH TRANSFER, FURNISHES THE TRUSTEE WITH A SIGNED LETTER
                  CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO
                  THE TRANSFER OF THIS NOTE (THE FORM OF WHICH CAN BE OBTAINED
                  FROM THE TRUSTEE) AND, IF SUCH TRANSFER IS IN RESPECT OF AN
                  AGGREGATE PRINCIPAL AMOUNT OF NOTES LESS THAN $250,000, AN
                  OPINION OF COUNSEL ACCEPTABLE TO THE TRANSFER AGENT THAT SUCH
                  TRANSFER IS IN

---------

(1) This should be included only if the Note is issued in global form.

                                       A-2
<PAGE>

                  COMPLIANCE WITH THE SECURITIES ACT, (E) IN ACCORDANCE WITH
                  ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
                  SECURITIES ACT (AND BASED UPON AN OPINION OF COUNSEL
                  ACCEPTABLE TO NORTHERN BORDER PARTNERS, L.P.), OR (F) PURSUANT
                  TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
                  ACT, AND, IN EACH CASE, IN ACCORDANCE WITH THE APPLICABLE
                  SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER
                  APPLICABLE JURISDICTION, AND

                  (3) AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS
                  NOTE OR AN INTEREST HEREIN IS TRANSFERRED A NOTICE
                  SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.](2)

         Capitalized terms used herein shall have the meanings assigned to them
in the Indenture referred to below unless otherwise indicated.

         1. Interest. Northern Border Partners, L.P., a Delaware limited
partnership (the "Partnership"), promises to pay interest on the principal
amount of this Note at 8 7/8% per annum, from June 2, 2000 until maturity [and
shall pay the Liquidated Damages, if any, payable pursuant to Section 5 of the
Registration Rights Agreement referred to below].(3) The Partnership will pay
interest and Liquidated Damages, if any, semiannually in arrears on June 15 and
December 15 of each year, or if any such day is not a Business Day, on the next
succeeding Business Day (each an "Interest Payment Date"). Interest on the Notes
will accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from the date of issuance; provided that if there is no
existing Default in the payment of interest, and if this Note is authenticated
between a record date referred to on the face hereof and the next succeeding
Interest Payment Date, interest shall accrue from such next succeeding Interest
Payment Date; provided, further, that the first Interest Payment Date shall be
December 15, 2000. The Partnership shall pay interest (including post-petition
interest in any proceeding under the Bankruptcy Code) on overdue principal and
premium, if any, from time to time on demand at the rate borne on the Notes; it
shall pay interest (including post-petition interest in any proceeding under the
Bankruptcy Code) on overdue installments of interest and Liquidated Damages, if
any, (without regard to any applicable grace periods) from time to time on
demand at the same rate to the extent lawful. Interest will be computed on the
basis of a 360-day year of twelve 30-day months.

         2. Method of Payment. The Partnership will pay interest on the Notes
(except defaulted interest) and Liquidated Damages, if any, to the Persons who
are registered Holders of Notes at the close of business on the June 1 or
December 1 next preceding the Interest Payment Date, even if such Notes are
canceled after such record date and on or before such Interest Payment Date,
except

---------

     (2) This bracketed provision applies only to Notes that have not been
exchanged for Series A Notes in the Exchange Offer, and it should be removed
upon the exchange of such Notes for Series A Notes in the Exchange Offer or upon
the transfer of such Notes that have been sold pursuant to the terms of the
Shelf Registration contemplated by the Registration Rights Agreement.

     (3) This bracketed provision applies only to Notes that have not been
exchanged for Series A Notes in the Exchange Offer, and it should be removed
upon the exchange of such Notes for Series A Notes in the Exchange Offer or upon
the transfer of such Notes that have been sold pursuant to the terms of the
Shelf Registration contemplated by the Registration Rights Agreement.

                                      A-3
<PAGE>

as provided in Section 2.12 of the Indenture with respect to defaulted interest.
The Notes will be payable as to principal, premium and Liquidated Damages, if
any, and interest at the office or agency of the Partnership maintained for such
purpose within the City and State of New York, or, at the option of the
Partnership, payment of interest and Liquidated Damages, if any, may be made by
check mailed to the Holders at their addresses set forth in the register of
Holders, and provided that payment by wire transfer of immediately available
funds will be required with respect to principal of and interest, premium and
Liquidated Damages, if any, on, all Global Notes and all other Notes the Holders
of which shall have provided wire transfer instructions to the Partnership or
the Paying Agent. Such payment shall be in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of
public and private debts.

         3. Paying Agent and Registrar. Initially, Bank One Trust Company, N.A.,
the Trustee under the Indenture, will act as Paying Agent and Registrar. The
Partnership may change any Paying Agent or Registrar without notice to any
Holder. The Partnership may act in any such capacity.

         4. Indenture. The Partnership issued the Notes under an Indenture dated
as of June 2, 2000 ("Indenture") between the Partnership, Northern Border
Intermediate Limited Partnership, as guarantor (the "Guarantor"), and the
Trustee. The terms of the Notes include those stated in the Indenture and those
made part of the Indenture by reference to the Trust Indenture Act of 1939, as
amended ("TIA"). The Notes are subject to all such terms, and Holders are
referred to the Indenture and such Act for a statement of such terms. To the
extent any provision of this Note conflicts with the express provisions of the
Indenture, the provisions of the Indenture shall govern and be controlling. The
Notes are obligations of the Partnership and the Guarantor limited to
$150,000,000 in aggregate principal amount.

         5. Optional Redemption. The Notes will be subject to redemption at any
time at the option of the Partnership in whole or in part, at a redemption price
equal to the principal amount of the Notes to be redeemed, plus any accrued and
unpaid interest and any Liquidated Damages, if any, thereon to the applicable
Redemption Date plus the "make-whole premium" as defined below.

                  The "make-whole premium" or "premium," with respect to any
Note to be redeemed, shall be equal to the excess, if any, of: (a) the sum of
the present values, calculated as of the Redemption Date, of (A) each interest
payment that, but for such redemption, would have been payable on the Note or
portion thereof being redeemed on each Interest Payment Date occurring after the
Redemption Date (excluding any accrued interest for the period prior to the
Redemption Date); and (B) the principal amount that, but for such redemption,
would have been payable at the final maturity of the Note being redeemed; over
(b) the principal amount of the Note being redeemed.

                  The present values of interest and principal payments referred
to in clause (a) above will be determined in accordance with generally accepted
principles of financial analysis. These present values will be calculated by
discounting the amount of each payment of interest or principal from the date
that each such payment would have been payable, but for the redemption, to the
Redemption Date at a discount rate equal to the comparable treasury yield (as
defined below) plus 35 basis points. The make-whole premium will be calculated
by an independent investment banking institution of national standing appointed
by the Partnership. If the Partnership fails to appoint an independent
investment banker at least 45 days prior to the Redemption Date, or if such
independent investment banker is unwilling or unable to make the calculation,
the calculation will be made by Banc of America Securities L.L.C. If Banc of
America Securities L.L.C. is unwilling or unable to

                                      A-4

<PAGE>

make the calculation, the Partnership will appoint an independent investment
banking institution of national standing to make the calculation.

                  For purposes of determining the make-whole premium, comparable
treasury yield means a rate of interest per annum equal to the weekly average
yield to maturity of United States Treasury Securities that have a constant
maturity that corresponds to the remaining term to maturity of the Notes,
calculated to the nearest 1/12th of a year. The comparable treasury yield will
be determined as of the third business day immediately preceding the applicable
Redemption Date.

                  The weekly average yields of United States Treasury Securities
will be determined by reference to the most recent statistical release published
by the Federal Reserve Bank of New York and designated "H.15(519) Selected
Interest Rates" or any successor release. If the H.15 statistical release sets
forth a weekly average yield for United States Treasury Securities having a
constant maturity that is the same as the remaining term calculated as set forth
above, then the comparable treasury yield will be equal to such weekly average
yield. In all other cases, the comparable treasury yield will be calculated by
interpolation on a straight-line basis, between the weekly average yields on the
United States Treasury Securities that have a constant maturity closest to and
greater than the remaining term and the United States Treasury Securities that
have a constant maturity closest to and less than the remaining term (in each
case as set forth in the H.15 statistical release or any successor release). Any
weekly average yields calculated by interpolation will be rounded to the nearest
1/100th of 1%, with any figure of 1/200th of 1% or above being rounded upward.
If weekly average yields for United States Treasury Securities are not available
in the H.15 statistical release or otherwise, then the comparable treasury yield
will be calculated by interpolation of comparable rates selected by an
independent investment banker selected in the manner described in the second
preceding paragraph.

         6. Mandatory Redemption. The Partnership shall not be required to make
mandatory redemption payments with respect to the Notes.

         7. Notice of Redemption. Notice of redemption will be mailed at least
30 days but not more than 60 days before the Redemption Date to each Holder
whose Notes are to be redeemed at its registered address. Notes in denominations
larger than $1,000 may be redeemed in part but only in whole multiples of
$1,000, unless all of the Notes held by a Holder are to be redeemed. On and
after the Redemption Date, interest and Liquidated Damages, if any, cease to
accrue on Notes or portions thereof called for redemption.

         8. Repurchase Upon a Rating Decline. If a Rating Decline occurs and an
Investment Grade rating has not been reinstated within 40 days after such
occurrence, each Holder of Notes shall have the right to require the Partnership
to repurchase all or any part (equal to $1,000 or an integral multiple thereof)
of such Holder's Notes at an offer price in cash equal to 100% of the aggregate
principal amount thereof plus accrued and unpaid interest and Liquidated
Damages, if any, thereon to the date of purchase (the "Rating Decline Payment").
Within 10 days following any Rating Decline, the Partnership shall mail an
initial notice to each Holder with a copy to the trustee stating that a Rating
Decline has occurred and a repurchase of the Notes by the Partnership may be
required. If within 30 days following such initial notice, the Rating Agency or
Agencies which downgraded the notes shall have failed to reinstate an Investment
Grade rating to the Notes, then the Partnership shall, on the 40th day following
such Rating Decline, mail a subsequent notice to each Holder with a copy
to the trustee stating that an Investment Grade rating of the Notes has not been
reinstated and that such Holder has the right to require the Partnership to
repurchase such Holder's notes pursuant

                                      A-5
<PAGE>

to the terms of the Indenture. The repurchase date shall be made on a Business
Day not less than 30 days nor more than 60 days after such initial notice is
mailed. The Partnership and the Guarantor will comply with the requirements of
Rule 14e-1 under the Exchange Act and any other securities laws and regulations
thereunder to the extent such laws and regulations are applicable in connection
with the repurchase of the Notes as a result of a Rating Decline.

      9. Denominations, Transfer, Exchange. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Notes may be registered and Notes may be exchanged as provided in
the Indenture. The Registrar and the Trustee may require a Holder, among other
things, to furnish appropriate endorsements and transfer documents and the
Partnership may require a Holder to pay any taxes and fees required by law or
permitted by the Indenture. The Partnership need not exchange or register the
transfer of any Note or portion of a Note selected for redemption, except for
the unredeemed portion of any Note being redeemed in part. Also, it need not
exchange or register the transfer of any Notes for a period of 15 days before a
selection of Notes to be redeemed or during the period between a record date and
the corresponding Interest Payment Date.

      10. Persons Deemed Owners. The registered Holder of a Note may be
treated as its owner for all purposes.

      11. Amendment, Supplement and Waiver. Subject to certain exceptions, the
Indenture or the Notes may be amended or supplemented with the consent of the
Holders of at least a majority in principal amount of the then outstanding
Notes, and any existing default or compliance with any provision of the
Indenture or the Notes may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes. Without the consent
of any Holder of a Note, the Indenture or the Notes may be amended or
supplemented to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Notes in addition to or in place of certificated Notes, to
provide for the assumption of the Partnership's or the Guarantor's obligations
to Holders of the Notes in case of a merger or consolidation or to make any
change that would provide any additional rights or benefits to the Holders of
the Notes or that does not adversely affect the legal rights under the Indenture
of any such Holder, or to comply with the requirements of the SEC in order to
effect or maintain the qualification of the Indenture under the TIA.

      12. Defaults and Remedies. Events of Default include: (a) default in the
payment of any interest or Liquidated Damages, if any, upon the Notes when it
becomes due and payable, and continuance of such default for a period of 30
days; or (b) default in the payment of the principal of (or premium, if any,
on), the Notes at their Stated Maturity; or (c) default in the performance, or
breach, of any term, covenant or warranty of the Partnership in this Indenture,
and continuance of such default or breach for a period of 90 days after there
has been given, by registered or certified mail, to the Partnership by the
Trustee or to the Partnership and the Trustee by the Holders of at least 25% in
principal amount of the Notes then outstanding a written notice specifying such
default or breach and requiring it to be remedied and stating that such notice
is a "Notice of Default" under the Indenture; or (d) the Partnership pursuant to
or within the meaning of the Bankruptcy Code (A) commences a voluntary case, (B)
consents to the entry of any 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 (e) a court of competent jurisdiction enters an order or decree
under the Bankruptcy Code that (A) is for relief against the Partnership in an
involuntary case, (B) appoints a Custodian of the Partnership or for all
or substantially all of its property, or (C) orders the liquidation of the
Partnership; and the order or decree remains unstayed and in effect for 90 days;
or (f) any default by the Partnership or any of its

                                      A-6

<PAGE>

Subsidiaries in the payment, at the final maturity date and after the expiration
of any applicable grace period, of principal of, premium, if any, Liquidated
Damages, if any, or interest on indebtedness for money borrowed in the principal
amount then outstanding of $25,000,000 or more, or acceleration of any
indebtedness of such amount, such that such indebtedness becomes due and payable
prior to its maturity date and such acceleration is not rescinded within 60 days
after notice to the Partnership. If any Event of Default occurs and is
continuing, the Trustee or the Holders of at least 25% in principal amount of
the then outstanding Notes may declare all the Notes to be due and payable
immediately. Notwithstanding the foregoing, in the case of an Event of Default
arising from certain events (as described in (d) and (e) above) of bankruptcy or
insolvency, all outstanding Notes will become due and payable without further
action or notice. Holders may not enforce the Indenture or the Notes except as
provided in the Indenture. Subject to certain limitations, Holders of a majority
in principal amount of the then outstanding Notes may direct the Trustee in its
exercise of any trust or power. The Trustee may withhold from Holders of the
Notes notice of any continuing Default or Event of Default (except a Default or
Event of Default relating to the payment of principal or interest) if it
determines that withholding notice is in their interest. The Holders of a
majority in aggregate principal amount of the Notes then outstanding by notice
to the Trustee may on behalf of the Holders of all of the Notes waive any
existing Default or Event of Default and its consequences under the Indenture
except a continuing Default or Event of Default in the payment of interest on,
or the principal of, the Notes. The Partnership is required to deliver to the
Trustee annually a statement regarding compliance with the Indenture, and the
Partnership is required upon becoming aware of any Default or Event of Default,
to deliver to the Trustee a statement specifying such Default or Event of
Default.

      13. Trustee Dealings with Partnership. The Trustee, in its individual or
any other capacity, may make loans to, accept deposits from, and perform
services for the Partnership or its Affiliates, and may otherwise deal with the
Partnership or its Affiliates, as if it were not the Trustee.

      14. No Recourse Against Others. None of the Partnership's policy committee
members, or the of the Partnership's general partners and their Affiliates
(other than the Partnership and the Guarantor), if any, and no director,
officer, employee, stockholder or unitholder, as such, of the Partnership, the
Guarantor, the Trustee, the general partners of the Partnership or any Affiliate
of any of the foregoing entities shall have any liability for any obligations of
the Partnership under the Notes or the Indenture or for any claim based on, in
respect of, or by reason of, such obligations or their creation. Each Holder by
accepting a Note waives and releases all such liability. The waiver and release
are part of the consideration for the issuance of the Notes.

      15. Authentication. This Note shall not be valid until authenticated by
the manual signature of a Responsible Officer of the Trustee or an
Authenticating Agent.

      16. Abbreviations. Customary abbreviations may be used in the name of a
Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (=
tenants by the entireties), JT TEN (= joint tenants with right of survivorship
and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts
to Minors Act).

      17. Additional Rights of Holders of Restricted Global Notes and Restricted
Definitive Notes. In addition to the rights provided to Holders of Notes under
the Indenture, Holders of Restricted Global Notes and Restricted Definitive
Notes shall have all the rights set forth in and shall be bound by the
provisions of the Registration Rights Agreement dated as of June 2, 2000,
between the Partnership and the parties named on the signature pages thereof
(the "Registration Rights Agreement").

                                       A-7

<PAGE>

         The Partnership will furnish to any Holder, upon written request, a
copy of the Indenture and/or the Registration Rights Agreement. Requests may be
made to:

                    Bank One Trust Company, N.A.
                    1 Banc One Plaza, Suite IL1-0126
                    Chicago, Illinois  60670-0126
                    Telecopier No.:  (312) 407-1708
                    Attention:  Corporate Trust Services Division

                                      A-8

<PAGE>

                                 ASSIGNMENT FORM

To assign this Note, fill in the form below: (I) or (we) assign and transfer
this Note to

--------------------------------------------------------------------------------
                  (Insert assignee's soc. sec. or tax I.D. no.)

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

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

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

--------------------------------------------------------------------------------
              (Print or type assignee's name, address and zip code)

and irrevocably appoint
                        --------------------------------------------------------

to transfer this Note on the books of the Partnership. The agent may substitute
another to act for him.

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

Date:

Your Signature:
               -----------------------------------------------------------------
                 (Sign exactly as your name appears on the face of this Note)

                                      A-9

<PAGE>

                               SIGNATURE GUARANTEE

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

                    Signatures must be guaranteed by an "eligible guarantor
                    institution" meeting the requirements of the Registrar,
                    which requirements include membership or participation in
                    the Security Transfer Agent Medallion Program ("STAMP") or
                    such other "signature guarantee program" as may be
                    determined by the Registrar in addition to, or in
                    substitution for, STAMP, all in accordance with the
                    Securities Exchange Act of 1934, as amended.

<PAGE>
            SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE(4)

The following exchanges of a part of this Global Note for an interest in another
Global Note or for a Definitive Note, or exchanges of a part of another Global
Note or Definitive Note for an interest in this Global Note, have been made:

<TABLE>
<CAPTION>
                                                                         PRINCIPAL AMOUNT             SIGNATURE OF
                            AMOUNT OF               AMOUNT OF          OF THIS GLOBAL  NOTE            AUTHORIZED
                           DECREASE IN             INCREASE IN            FOLLOWING SUCH              SIGNATORY OF
                        PRINCIPAL AMOUNT        PRINCIPAL AMOUNT           DECREASE (OR              TRUSTEE OR NOTE
DATE OF EXCHANGE       OF THIS GLOBAL NOTE     OF THIS GLOBAL NOTE          INCREASE)                   CUSTODIAN
----------------       -------------------     -------------------     --------------------          ---------------
<S>                    <C>                     <C>                     <C>                           <C>

</TABLE>

----------

(4)  This should be included only if the Note is issued in global form.

                                      A-11
<PAGE>

                      OPTION OF HOLDER TO ELECT PURCHASE(5)

If you want to elect to have this Note purchased by the Partnership pursuant to
Section 4.11 of the Indenture, check the box below:

                                      [ ]

If you want to elect to have only part of the Note purchased by the Partnership
pursuant to Section 4.11 of the Indenture, state the amount you elect to have
purchased: $__________

                                 Date:

                       Your Signature:
                                      ------------------------------------------
                                (Sign exactly as your name appears on the Note)

                       Social Security or Tax Identification No.:
                                                                  --------------

                                                            Signature Guarantee:

----------

(5) This should be included only if the Note is issued in certificated form.

                                      A-12
<PAGE>

                                                                     EXHIBIT B-1

          FORM OF CERTIFICATE FOR EXCHANGE OR REGISTRATION OF TRANSFER
                               OF DEFINITIVE NOTES
                 (Pursuant to Section 2.06(b) of the Indenture)

Bank One Trust Company, N.A.
   as Trustee and Registrar

        Re:  8 7/8% Notes due 2010 of Northern Border Partners, L.P.

        Reference is hereby made to the Indenture dated as of June 2, 2000 (the
"Indenture") among Northern Border Partners, L.P. (the "Partnership"), Northern
Border Intermediate Partnership (the "Guarantor") and Bank One Trust Company,
N.A., as trustee (the "Trustee"). Capitalized terms used but not defined herein
shall have the meanings given to them in the Indenture.

        This relates to $________ principal amount of Notes which are evidenced
by one or more Definitive Notes in the name of ____________________ (the
"Transferor"). The Transferor has requested an exchange or transfer of such
Definitive Note(s) in the form of an equal principal amount of Notes evidenced
by one or more Definitive Notes, to be delivered to the Transferor or, in the
case of a transfer of such Notes, to such Person as the Transferor instructs the
Trustee.

        In connection with such request and in respect of the Notes surrendered
to the Trustee herewith for exchange (the "Surrendered Notes"), the Holder of
such Surrendered Notes hereby certifies that:

[CHECK ONE]

        [ ]    the Surrendered Notes are being acquired for the Transferor's
               own account, without transfer;

               or

        [ ]    the Surrendered Notes are being transferred to the Partnership or
               one of its Subsidiaries;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to and in
               accordance with Rule 144A under the United States Securities Act
               of 1933, as amended (the "Securities Act"), and, accordingly, the
               Transferor hereby further certifies that the Surrendered Notes
               are being transferred to a Person that the Transferor reasonably
               believes is

                                     B-1-1
<PAGE>

               purchasing the Surrendered Notes for its own account, or for one
               or more accounts with respect to which such Person exercises sole
               investment discretion, and such Person and each such account is a
               "qualified institutional buyer" within the meaning of Rule 144A,
               in each case in a transaction meeting the requirements of Rule
               144A;

               or

        [ ]    the Surrendered Notes are being transferred in a transaction
               permitted by Rule 144 under the Securities Act;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to an
               exemption under the Securities Act other than Rule 144A, Rule 144
               or Rule 904 to Person who is an Institutional Accredited Investor
               and the Transferor further certifies that the transfer complies
               with the transfer restrictions applicable to Definitive Notes
               bearing the legend set forth in Section 2.06(g) of the Indenture
               and the requirements of the exemption claimed, which
               certification is supported by (a) if such transfer is in respect
               of a principal amount of Notes at the time of transfer of
               $100,000 or more, a certificate executed by the transferee in
               the form of Exhibit C to the Indenture, or (b) if such transfer
               is in respect of a principal amount of Notes at the time of
               transfer of less than $100,000, (i) a certificate executed in
               the form of Exhibit C to the Indenture and (ii) an Opinion of
               Counsel provided by the Transferor or the transferee (a copy of
               which the Transferor has attached to this certification), to the
               effect that (1) such transfer is in compliance with the
               Securities Act and (2) such transfer complies with any
               applicable blue sky securities laws of any state of the United
               States;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to an
               effective registration statement under the Securities Act;

               and the Surrendered Notes are being transferred in compliance
               with any applicable blue sky securities laws of any state of the
               United States or any other applicable jurisdiction.

                                     B-1-2
<PAGE>

        This certificate and the statements contained herein are made for your
benefit and the benefit of the Partnership.

                                          [Insert Name of Transferor]

                                          By:
                                              ----------------------------------
                                              Name:
                                              Title:

Dated:

cc: Northern Border Partners, L.P.

                                     B-1-3
<PAGE>

                                                                     EXHIBIT B-2

          FORM OF CERTIFICATE FOR EXCHANGE OR REGISTRATION OF TRANSFER
                    FROM 144A GLOBAL NOTE TO DEFINITIVE NOTE
                 (Pursuant to Section 2.06(c) of the Indenture)

Bank One Trust Company, N.A.
   as Trustee and Registrar

        Re:    8 7/8% Notes due 2010 of Northern Border Partners, L.P.

        Reference is hereby made to the Indenture dated as of June 2, 2000 (the
"Indenture") among Northern Border Partners, L.P. (the "Partnership"), Northern
Border Intermediate Partnership (the "Guarantor") and Bank One Trust Company,
N.A., as trustee (the "Trustee"). Capitalized terms used but not defined herein
shall have the meanings given to them in the Indenture.

        This letter relates to $__________ principal amount of Notes which are
evidenced by a beneficial interest in one or more 144A Global Notes in the name
of ___________________ (the "Transferor"). The Transferor has requested an
exchange or transfer of such beneficial interest in the form of an equal
principal amount of Notes evidenced by one or more Definitive Notes, to be
delivered to the Transferor or, in the case of a transfer of such Notes, to such
Person as the Transferor instructs the Trustee.

        In connection with such request and in respect of the Notes surrendered
to the Trustee herewith (the "Surrendered Notes"), the Holder of such
Surrendered Notes hereby certifies that:

[CHECK ONE]

        [ ]    the Surrendered Notes are being transferred to the beneficial
               owner of such Notes;

               or

        [ ]    the Surrendered Notes are being transferred to the Partnership or
               one of its Subsidiaries;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to and in
               accordance with Rule 144A under the United States Securities Act
               of 1933, as amended (the "Securities Act"), and, accordingly, the
               Transferor hereby further certifies that the Surrendered Notes
               are being transferred to a Person that the Transferor reasonably
               believes is purchasing the Surrendered Notes for its own account,
               or for one or more accounts with respect to which such Person
               exercises sole investment discretion, and such

                                     B-2-1
<PAGE>

               Person and each such account is a "qualified institutional
               buyer" within the meaning of Rule 144A, in each case in a
               transaction meeting they requirements of Rule 144A;

               or

        [ ]    the Surrendered Notes are being transferred in a transaction
               permitted by Rule 144 under the Securities Act;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to an
               effective registration statement under the Securities Act;

               or

        [ ]    the Surrendered Notes are being transferred pursuant to an
               exemption under the Securities Act other than Rule 144A, Rule 144
               or Rule 904 to a Person who is an Institutional Accredited
               Investor and the Transferor further certifies that the transfer
               complies with the transfer restrictions applicable to beneficial
               interests in Global Notes bearing the legend set forth in
               Section 2.06(g) of the Indenture and the requirements of the
               exemption claimed, which certification is supported by (a) if
               such transfer is in respect of a principal amount of Notes at
               the time of transfer of $100,000 or more, a certificate executed
               by the transferee in the form of Exhibit C to the Indenture, or
               (b) if such transfer is in respect of a principal amount of
               Notes at the time of transfer of less than $100,000, (i) a
               certificate executed in the form of Exhibit C to the Indenture
               and (ii) an Opinion of Counsel provided by the Transferor or the
               transferee (a copy of which the Transferor has attached to this
               certification), to the effect that (1) such transfer is in
               compliance with the Securities Act and (2) such transfer
               complies with any applicable blue sky securities laws of any
               state of the United States;

               and the Surrendered Notes are being transferred in compliance
               with any applicable blue sky securities laws of any state of the
               United States or any other applicable jurisdiction.

        This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.

                                         [Insert Name of Transferor]

                                         By:
                                             -----------------------------------
                                             Name:
                                             Title:
Dated:
cc:  Northern Border Partners, L.P.

                                     B-2-2
<PAGE>

                                                                       EXHIBIT C

                     FORM OF CERTIFICATE TO BE DELIVERED BY
                       INSTITUTIONAL ACCREDITED INVESTORS

                                                          ---------------, -----

Bank One Trust Company, N.A.,
   as Trustee and Registrar

Ladies and Gentlemen:

        We are delivering this letter in connection with an offering of a series
of 8 7/8% Notes due 2010 (the "Notes") of Northern Border Partners, L.P., a
Delaware limited partnership (the "Partnership"), all as described in the
offering memorandum (the "Offering Memorandum") dated May 26, 2000 relating to
the offering of the Notes. We hereby confirm that:

               (i) we are an "accredited investor" within the meaning of Rule
        501(a)(1), (2), (3) or (7) under the Securities Act of 1933, as amended
        (the "Securities Act"), or an entity in which all of the equity owners
        are accredited investors within the meaning of Rule 501(a)(1), (2), (3)
        or (7) under the Securities Act (an "Institutional Accredited
        Investor");

               (ii) any purchase of Notes by us will be for our own account or
        for the account of one or more other Institutional Accredited Investors;

               (iii) in the event that we purchase any Notes, we will acquire
        Notes having a minimum purchase price of at least $100,000 for our own
        account and for each separate account for which we are acting;

               (iv) we have such knowledge and experience in financial and
        business matters that we are capable of evaluating the merits and risks
        of purchasing Notes and we, and any accounts for which we are acting,
        are able to bear the economic risks of its or their investment;

               (v) we are not acquiring Notes with a view to any distribution
        thereof in a transaction that would violate the Securities Act or the
        securities laws of any State of the United States or any other
        applicable jurisdiction; provided that the disposition of our property
        and the property of any accounts for which we are acting as fiduciary
        shall remain at all times within our control; and

               (vi) we have received a copy of the Offering Memorandum and
        acknowledge that we have had access to such financial and other
        information, and have been afforded the opportunity to ask such
        questions of representatives of the Partnership and receive answers
        thereto, as we deem necessary in connection with our decision to
        purchase Notes.

                                      C-1
<PAGE>

        We understand that the Notes were offered in a transaction not involving
any public offering within the meaning of the Securities Act and that the Notes
have not been registered under the Securities Act, and we agree, on our own
behalf and on behalf of each account for which we acquire any Notes, that such
Notes may be offered, resold, pledged or otherwise transferred only (i) to a
person whom we reasonably believe to be a qualified institutional buyer (as
defined in Rule 144A under the Securities Act) in a transaction meeting the
requirements of Rule 144A under the Securities Act, in a transaction meeting the
requirements of Rule 144 under the Securities Act, or in accordance with another
exemption from the registration requirements of the Securities Act (and based
upon an opinion of counsel if the Partnership so requests), (ii) to the
Partnership or (iii) pursuant to an effective registration statement, and in
each case, in accordance with any applicable securities laws of any State of the
United States or any other applicable jurisdiction, and we will, and each
subsequent holder of the Notes is required to, notify any subsequent purchaser
from us or it of the resale restrictions set forth in clause (i) above. We
acknowledge that the Notes will bear legends substantially to the effect set
forth in the Offering Memorandum under the "Notice to Investors." We understand
that the registrar will not be required to accept for registration of transfer
any Notes, except upon presentation of evidence satisfactory to the Partnership
that the foregoing restrictions on transfer have been complied with.

        We acknowledge that you and the Partnership will rely upon our
confirmations, acknowledgments and agreements set forth herein, and we agree to
notify you promptly in writing if any of our representations or warranties
herein ceases to be accurate and complete.

        THIS LETTER SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE
LAWS OF THE STATE OF NEW YORK.

                                        ----------------------------------------
                                        [Name of Purchaser]

                                        By
                                           -------------------------------------
                                           Name:
                                           Title:
                                           Address:

                                      C-2
<PAGE>

                                                                       EXHIBIT D

                          REGISTRATION RIGHTS AGREEMENT

                                See Exhibit 4.2

                                       D-1

<PAGE>EXHIBIT 4.2

                                                               Execution Copy

                          REGISTRATION RIGHTS AGREEMENT

                  This Registration Rights Agreement (this "Agreement") is made
and entered into as of June 2, 2000 by and among Northern Border Partners, L.P.,
a Delaware limited partnership (the "Partnership"), Northern Border Intermediate
Limited Partnership, a Delaware limited partnership, and Banc of America
Securities LLC ("BOA"), Banc One Capital Markets, Inc. and SunTrust Equitable
Securities (the "Initial Purchasers"), who have agreed to purchase the
Partnership's 8 7/8% Senior Notes due 2010 (the "Senior Notes") pursuant to and
subject to the terms and conditions of a certain Purchase Agreement, dated May
26, 2000 (the "Purchase Agreement"), by and among the Partnership and the
Initial Purchasers. In order to induce the Initial Purchasers to purchase the
Senior Notes, the Partnership has agreed to provide the registration rights set
forth in this Agreement. The execution and delivery of this Agreement is a
condition to the obligation of the Initial Purchasers to purchase the Senior
Notes pursuant to the Purchase Agreement.

                  The parties hereby agree as follows:

SECTION 1.        DEFINITIONS

                  As used in this Agreement, the following capitalized terms
shall have the following meanings:

                  Advice:  As defined in Section 6(d) hereof.

                  Affiliate: With respect to any specified Person, "Affiliate"
shall mean 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 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 "affiliated," "controlling" and "controlled" have
meanings correlative to the foregoing. Notwithstanding the foregoing, with
respect to the Partnership "Affiliate" shall mean Northern Border Pipeline
Company, Northern Border Intermediate Limited Partnership, Northern Plains
Natural Gas Company, Pan Border Gas Company and Northwest Border Pipeline
Company.

                  Authorized Officer: Any of the Chief Executive Officer,
Chief Financial and Accounting Officer or any vice president of the Partnership,
acting singly.

                  Broker-Dealer: Any broker or dealer registered under the
Exchange Act.

                  Broker-Dealer Transfer Restricted Securities: New Senior
Notes that are acquired by a Broker-Dealer in the Exchange Offer in exchange for
Senior Notes that such Broker-Dealer

<PAGE>

acquired for its own account as a result of market-making activities or other
trading activities (other than Senior Notes acquired directly from the
Partnership or any of its Affiliates).

                  Business Day: Any day except a Saturday, Sunday or other day
in the City of New York, or in the city of the corporate trust office of the
Trustee, on which banks are authorized to close.

                  Closing Date: The date of this Agreement.

                  Commission: The Securities and Exchange Commission.

                  Consummate: The Exchange Offer shall be deemed "consummated"
for purposes of this Agreement upon the occurrence of (i) the filing and
effectiveness under the Securities Act of the Exchange Offer Registration
Statement relating to the New Senior Notes to be issued in the Exchange Offer,
(ii) the maintenance of such Exchange Offer Registration Statement continuously
effective and the keeping of the Exchange Offer open for a period not less than
the minimum period required pursuant to Section 3(b) hereof, and (iii) the
delivery by the Partnership to the Trustee under the Indenture of New Senior
Notes in the same aggregate principal amount as the aggregate principal amount
of Senior Notes that were tendered by Holders thereof pursuant to the Exchange
Offer.

                  Damages Payment Date: With respect to the Transfer Restricted
Securities, each Interest Payment Date until the earlier of (i) the date on
which Liquidated Damages are no longer payable and (ii) maturity of the Notes.

                  Definitive Notes: As defined in the Indenture.

                  Effectiveness Target Date: As defined in Section 5.

                  Exchange Act: The Securities Exchange Act of 1934, as
amended, and the rules and regulations promulgated thereunder.

                  Exchange Offer: The registration by the Partnership under the
Securities Act of the New Senior Notes pursuant to an Exchange Offer
Registration Statement pursuant to which the Partnership offers the Holders of
all outstanding Transfer Restricted Securities the opportunity to exchange all
such outstanding Transfer Restricted Securities held by such Holders for New
Senior Notes in an aggregate principal amount equal to the aggregate principal
amount of the Transfer Restricted Securities tendered in such exchange offer by
such Holders.

                  Exchange Offer Registration Statement: The Registration
Statement relating to the Exchange Offer, including the related Prospectus.

                  Exempt Resales: The transactions in which the Initial
Purchasers propose to sell the Senior Notes (a) to certain "qualified
institutional buyers," as such term is defined in Rule 144A

                                       -2-

<PAGE>

under the Securities Act and (b) to certain institutional "accredited investors"
as such term is defined in Rule 501(a)(1),(2),(3) or (7) of Regulation D under
the Securities Act.

                  Global Note Holder: A "Holder" as defined in the Indenture.

                  Holders: As defined in Section 2(b) hereof.

                  Indenture: The Indenture, dated as of the Closing Date,
among the Partnership and Bank One Trust Company, N.A., as trustee (the
"Trustee"), pursuant to which the Notes are to be issued, as such Indenture is
amended or supplemented from time to time in accordance with the terms thereof.

                  Initial Purchasers: As defined in the preamble hereto.

                  Interest Payment Date: As defined in the Indenture and the
Notes.

                  Liquidated Damages: As defined in Section 5 hereof.

                  Memorandum: As defined in the Purchase Agreement.

                  NASD: National Association of Securities Dealers, Inc.

                  Notes: The Senior Notes and the New Senior Notes.

                  New Senior Notes: The Partnership's 8 7/8% Senior Notes due
2010, Series A to be issued pursuant to the Indenture (i) in the Exchange Offer
or (ii) upon the request of any holder of Senior Notes covered by a Shelf
Registration Statement, in exchange for such Senior Notes.

                  Person: An individual, partnership, corporation, limited
liability company, joint venture, association, joint-stock company, trust or
unincorporated organization, or a government or agency or political subdivision
thereof or any other entity.

                  Prospectus: The prospectus included in a Registration
Statement at the time such Registration Statement is declared effective, as
amended or supplemented by any prospectus supplement and by all other amendments
thereto, including post-effective amendments, and all material incorporated by
reference into such Prospectus.

                  Record Holder: With respect to any Damages Payment Date
relating to Notes, each Person who is a Holder of Notes on the record date with
respect to the Interest Payment Date on which such Damages Payment Date shall
occur.

                  Registration Default: As defined in Section 5 hereof.

                                       -3-

<PAGE>

                  Registration Statement: Any registration statement of the
Partnership relating to (a) an offering of New Senior Notes pursuant to an
Exchange Offer or (b) the registration for resale of Transfer Restricted
Securities pursuant to the Shelf Registration Statement, in each case (i) which
is filed pursuant to the provisions of this Agreement, and (ii) including the
Prospectus included therein, all amendments and supplements thereto (including
post-effective amendments) and all exhibits and material incorporated by
reference therein.

                  Restricted Broker-Dealer: Any Broker-Dealer that holds
Broker-Dealer Transfer Restricted Securities.

                  Securities Act: The Securities Act of 1933, as amended, and
the rules and regulations promulgated thereunder.

                  Shelf Filing Deadline: As defined in Section 4 hereof.

                  Shelf Registration Statement: As defined in Section 4 hereof.

                  TIA: The Trust Indenture Act of 1939, as amended, as in
effect on the date of the Indenture.

                  Transfer Restricted Securities: Each Senior Note, until the
earliest to occur of (a) the date on which such Senior Note is exchanged in the
Exchange Offer and entitled to be resold to the public by the Holder thereof
without complying with the prospectus delivery requirements of the Securities
Act, (b) the date on which such Senior Note has been effectively registered
under the Securities Act and disposed of in accordance with a Shelf Registration
Statement, (c) the date on which such Senior Note is distributed to the public
pursuant to Rule 144 or is saleable pursuant to Rule 144(k) under the Securities
Act and (d) the date on which such Senior Note is distributed by a Broker-Dealer
pursuant to the "Plan of Distribution" contemplated by the Exchange Offer
Registration Statement (including delivery of the Prospectus contained therein).

                  Underwritten Registration or Underwritten Offering: A
registration in which securities of the Partnership are sold to an underwriter
for reoffering to the public.

SECTION 2.        SECURITIES SUBJECT TO THIS AGREEMENT

                  (a)      Transfer Restricted Securities. The securities
entitled to the benefits of this Agreement are the Transfer Restricted
Securities.

                  (b)      Holders of Transfer Restricted Securities. A Person
is deemed to be a holder of Transfer Restricted Securities (each, a "Holder")
whenever such Person owns Transfer Restricted Securities.

                                       -4-

<PAGE>

SECTION 3.        REGISTERED EXCHANGE OFFER

                  (a) Unless the Exchange Offer shall not be permissible under
applicable law or Commission policy (after the procedures set forth in Section
6(a) below have been complied with), the Partnership shall (i) cause to be filed
with the Commission as soon as practicable after the Closing Date, but in no
event later than 120 days after the Closing Date, the Exchange Offer
Registration Statement under the Securities Act relating to the New Senior Notes
and the Exchange Offer, (ii) use its reasonable best efforts to cause such
Exchange Offer Registration Statement to become effective at the earliest
possible time, but in no event later than 180 days after the Closing Date, (iii)
in connection with the foregoing, (A) file all pre-effective amendments to such
Exchange Offer Registration Statement as may be necessary in order to cause such
Exchange Offer Registration Statement to become effective, (B) if applicable,
file a post-effective amendment to such Exchange Offer Registration Statement
pursuant to Rule 430A under the Securities Act and (C) cause all necessary
filings, if any, in connection with the registration and qualification of the
New Senior Notes to be made under the Blue Sky laws of such jurisdictions as are
necessary to permit Consummation of the Exchange Offer and (iv) upon the
effectiveness of such Exchange Offer Registration Statement, commence and
Consummate the Exchange Offer. The Exchange Offer Registration Statement shall
be on the appropriate form permitting registration of the New Senior Notes to be
offered in exchange for the Transfer Restricted Securities and to permit sales
of Broker- Dealer Transfer Restricted Securities by Broker-Dealers as
contemplated by Section 3(c) below.

                  (b) The Partnership shall use its reasonable best efforts to
cause the Exchange Offer Registration Statement to be effective continuously for
a period of thirty (30) days from the date on which the Exchange Offer
Registration Statement is declared effective and shall keep the Exchange Offer
open for a period of not less than the minimum period required under applicable
federal and state securities laws to Consummate the Exchange Offer; provided,
however, that in no event shall such period be less than 20 Business Days. The
Partnership shall cause the Exchange Offer to comply with all applicable federal
and state securities laws. No securities other than the Notes shall be included
in the Exchange Offer Registration Statement. The Partnership shall use its
reasonable best efforts to cause the Exchange Offer to be Consummated on the
earliest practicable date after the Exchange Offer Registration Statement has
become effective, but in no event later than 30 Business Days thereafter.

                  (c) The Partnership shall include a "Plan of Distribution"
section in the Prospectus contained in the Exchange Offer Registration Statement
and indicate that any Restricted Broker-Dealer who holds Senior Notes that are
Transfer Restricted Securities and that were acquired for the account of such
Broker-Dealer as a result of market-making activities or other trading
activities (other than Transfer Restricted Securities acquired directly from the
Partnership or one of its Affiliates) may exchange such Senior Notes pursuant to
the Exchange Offer; however, such Broker-Dealer may be deemed to be an
"underwriter" within the meaning of the Securities Act and must, therefore,
deliver a prospectus meeting the requirements of the Securities Act in
connection with its initial sale of the New Senior Notes received by such
Broker-Dealer in the Exchange Offer, which prospectus delivery requirement may
be satisfied by the delivery by such Broker-Dealer of

                                       -5-

<PAGE>

the Prospectus contained in the Exchange Offer Registration Statement. Such
"Plan of Distribution" section shall also contain all other information with
respect to such resales of Broker-Dealer Transfer Restricted Securities that the
Commission may require in order to permit such sales pursuant thereto but such
"Plan of Distribution" shall not name any such Broker-Dealer or disclose the
amount of Notes held by any such Broker-Dealer except to the extent required by
the Commission as a result of a change in policy after the date of this
Agreement.

                  The Partnership shall use its reasonable best efforts to keep
the Exchange Offer Registration Statement continuously effective, supplemented
and amended as required by the provisions of Section 6(c) below to the extent
necessary to ensure that it is available for resales of Broker-Dealer Transfer
Restricted Securities acquired by Restricted Broker-Dealers and to ensure that
it conforms with the requirements of this Agreement, the Securities Act and the
policies, rules and regulations of the Commission as announced from time to
time, for a period of 120 days from the date on which the Exchange Offer
Registration Statement is declared effective or, if shorter, until all
Broker-Dealer Transfer Restricted Securities have been sold thereunder.

                  The Partnership shall provide sufficient copies of the latest
version of such Prospectus to such Restricted Broker-Dealers promptly upon
request at any time during such 120 day period in order to facilitate such
sales.

SECTION 4.        SHELF REGISTRATION

                  (a) Shelf Registration. If (i) the Partnership is not required
to file an Exchange Offer Registration Statement or to consummate the Exchange
Offer because the Exchange Offer is not permitted by applicable law or
Commission policy (after the procedures set forth in Section 6(a) below have
been complied with) or (ii) if any Holder of Transfer Restricted Securities
shall notify the Partnership within twenty (20) Business Days of the
Consummation of the Exchange Offer that (A) such Holder is prohibited by
applicable law or Commission policy from participating in the Exchange Offer, or
(B) such Holder may not resell the New Senior Notes acquired by it in the
Exchange Offer to the public without delivering a prospectus and that the
Prospectus contained in the Exchange Offer Registration Statement is not
appropriate or available for such resales by such Holder, or (C) such Holder is
a Broker-Dealer and holds Senior Notes acquired directly from the Partnership or
one of its Affiliates, then the Partnership shall:

                  (x) cause to be filed a shelf registration statement pursuant
         to Rule 415 under the Securities Act, which may be an amendment to the
         Exchange Offer Registration Statement (in either event, the "Shelf
         Registration Statement") on or prior to the earliest to occur of (1)
         the 60th day after the date on which the Partnership receives notice
         from the Commission or determines that it is not required to file the
         Exchange Offer Registration Statement pursuant to clause (i) above, (2)
         the 60th day after the date on which the Partnership receives notice
         from a Holder of Transfer Restricted Securities as contemplated by
         clause (ii) above, and (3) the 150th day after the Closing Date (such
         earliest date being the "Shelf Filing Deadline"), which Shelf
         Registration Statement shall provide for resales of all Transfer

                                       -6-

<PAGE>

         Restricted Securities the Holders of which shall have provided the
         information required pursuant to Section 4(b) hereof; and

                  (y) use its reasonable best efforts to cause such Shelf
         Registration Statement to be declared effective by the Commission on or
         before the 60th day after the Shelf Filing Deadline.

                  The Partnership shall use its reasonable best efforts to keep
such Shelf Registration Statement continuously effective, supplemented and
amended as required by and subject to the provisions of Sections 6(b) and (c)
hereof to the extent necessary to ensure that it is available for sales of
Transfer Restricted Securities by the Holders thereof entitled to the benefit of
this Section 4(a), and to ensure that it conforms with the requirements of this
Agreement, the Securities Act and the policies, rules and regulations of the
Commission as announced from time to time, for a period of at least 18 months
(as extended pursuant to Section 6(c)(i)) following the date on which such Shelf
Registration Statement first becomes effective under the Securities Act or such
shorter period ending when all of the Transfer Restricted Securities available
for sale thereunder have been sold pursuant thereto.

                  (b) Provision by Holders of Certain Information in Connection
with the Shelf Registration Statement. No Holder of Transfer Restricted
Securities may include any of its Transfer Restricted Securities in any Shelf
Registration Statement pursuant to this Agreement unless and until such Holder
furnishes to the Partnership in writing, within 15 Business Days after receipt
of a request therefor, such information as the Partnership may reasonably
request for use in connection with any Shelf Registration Statement or
Prospectus or preliminary Prospectus included therein. No Holder of Transfer
Restricted Securities shall be entitled to Liquidated Damages pursuant to
Section 5 hereof unless and until such Holder shall have provided all such
reasonably requested information. Each Holder as to which any Shelf Registration
Statement is being effected agrees to furnish promptly to the Partnership all
information required to be disclosed in order to make the information previously
furnished to the Partnership by such Holder not materially misleading.

SECTION 5.        LIQUIDATED DAMAGES

                  If (i) any of the Registration Statements required by this
Agreement are not filed with the Commission on or prior to the date specified
for such filing in this Agreement then additional interest shall accrue on the
principal amount of the Senior Notes at a rate of 0.25% per annum from the date
such filing was required; (ii) any of such Registration Statements have not been
declared effective by the Commission on or prior to the date specified for such
effectiveness in this Agreement (the "Effectiveness Target Date") then
additional interest shall accrue on the principal amount of the Senior Notes at
a rate of 0.25% per annum from the Effectiveness Target Date; (iii) the Exchange
Offer has not been Consummated within 30 Business Days after the Effectiveness
Target Date with respect to the Exchange Offer Registration Statement then
additional interest shall accrue on the principal amount of the Senior Notes at
a rate of 0.25% per annum from the 31st Business Day after the Effectiveness
Target Date; or (iv) any Registration Statement required by this

                                       -7-

<PAGE>

Agreement is filed and declared effective but shall thereafter cease to be
effective or fail to be usable for its intended purpose without being succeeded
within 30 days by a post-effective amendment to such Registration Statement, the
effectiveness of another Registration Statement or the use of the Prospectus (as
amended or supplemented) is again permitted that cures such failure then
additional interest shall accrue on the principal amount of the Senior Notes at
a rate of 0.25% per annum from the 31st day following such Registration
Statement ceasing to be effective (each such event referred to in clauses (i)
through (iv), a "Registration Default"). The additional interest rate owing
pursuant to the preceding clauses (i) through (iv) shall be increased by 0.25%
per annum each 90-day period that such Registration Default continues, provided
such additional interest does not exceed the Maximum Rate, as defined below.

                  All accrued Liquidated Damages (as defined below) shall be
paid to the Global Note Holders or Holders of certificated Notes by the
Partnership on each Interest Payment Date generally in accordance with the
provisions in the Indenture regarding payment of interest. Notwithstanding
anything to the contrary set forth herein, (1) upon filing of the Exchange Offer
Registration Statement (and/or, if applicable, the Shelf Registration
Statement), in the case of (i) above, (2) upon the effectiveness of the Exchange
Offer Registration Statement (and/or, if applicable, the Shelf Registration
Statement), in the case of (ii) above, (3) upon Consummation of the Exchange
Offer, in the case of (iii) above, or (4) upon the filing of a post-effective
amendment to the Registration Statement or an additional Registration Statement
that causes the Exchange Offer Registration Statement (and/or, if applicable,
the Shelf Registration Statement) to again be declared effective or the
Prospectus to be made usable in the case of (iv) above, the Liquidated Damages
payable with respect to the Transfer Restricted Securities as a result of such
clause (i), (ii), (iii) or (iv) ("Liquidated Damages"), as applicable, shall
cease. Liquidated Damages on the Senior Notes may not exceed, in the aggregate,
1% of the face amount of the Senior Notes per annum (the "Maximum Rate").

                  All obligations of the Partnership set forth in the preceding
paragraph that are outstanding with respect to any Transfer Restricted Security
at the time such security ceases to be a Transfer Restricted Security shall
survive until such time as all such obligations with respect to such security
shall have been satisfied in full.

SECTION 6.        REGISTRATION PROCEDURES

                  (a) Exchange Offer Registration Statement. In connection with
the Exchange Offer, the Partnership shall comply with all applicable provisions
of Section 6(c) below, shall use its reasonable best efforts to effect such
exchange to permit the sale of Broker-Dealer Transfer Restricted Securities
being sold in accordance with the intended method or methods of distribution
thereof (which shall be in a manner consistent with the terms of this
Agreement), and shall comply with all of the following provisions:

                  (i) If, following the date hereof and prior to the
         Consummation of the Exchange Offer, there has been published a change
         in Commission policy with respect to exchange

                                       -8-

<PAGE>

         offers such as the Exchange Offer, such that in the reasonable opinion
         of counsel to the Partnership there is a substantial question as to
         whether the Exchange Offer is permitted by applicable law or Commission
         policy, the Partnership hereby agrees to seek a no-action letter or
         other favorable decision from the Commission staff allowing the
         Partnership to Consummate an Exchange Offer for such Senior Notes. The
         Partnership hereby agrees to pursue the issuance of such a decision to
         the Commission staff level but shall not be required to take
         commercially unreasonable action to effect a change of Commission
         policy. The Partnership hereby agrees, however, to take all such other
         actions as are reasonably requested by the Commission or the Commission
         staff or otherwise required in connection with the issuance of such
         decision, including without limitation, to (A) participate in
         telephonic conferences with the Commission or the Commission staff, (B)
         deliver to the Commission or the Commission staff an analysis prepared
         by counsel to the Partnership setting forth the legal bases, if any,
         upon which such counsel has concluded that such an Exchange Offer
         should be permitted and (C) diligently pursue a resolution (which need
         not be favorable) by the Commission staff of such submission.

                  (ii) As a condition to its participation in the Exchange Offer
         pursuant to the terms of this Agreement, each Holder of Transfer
         Restricted Securities shall furnish, upon the request of the
         Partnership, prior to the Consummation thereof, a written
         representation to the Partnership (which may be contained in the letter
         of transmittal contemplated by the Exchange Offer Registration
         Statement) to the effect that (A) it is not an Affiliate of the
         Partnership, (B) it is not engaged in, and does not intend to engage
         in, and has no arrangement or understanding with any Person to
         participate in, a distribution (within the meaning of the Securities
         Act) of the New Senior Notes to be issued in the Exchange Offer and (C)
         it is acquiring the New Senior Notes in its ordinary course of
         business. In addition, all such Holders of Transfer Restricted
         Securities shall otherwise reasonably cooperate in the Partnership's
         preparations for the Exchange Offer. Each Holder hereby acknowledges
         and agrees that any Broker-Dealer and any such Holder using the
         Exchange Offer to participate in a distribution of the securities to be
         acquired in the Exchange Offer (1) could not under Commission policy as
         in effect on the date of this Agreement rely on the position of the
         Commission enunciated in Morgan Stanley and Co., Inc. (available June
         5, 1991) and Exxon Capital Holdings Corporation (available May 13,
         1988), as interpreted in the Commission's letter to Sherman & Sterling
         dated July 2, 1993, and similar no-action letters (including any
         no-action letter obtained pursuant to clause (i) above), and (2) must
         comply with the registration and prospectus delivery requirements of
         the Securities Act in connection with a secondary resale transaction
         and that such a secondary resale transaction should be covered by an
         effective registration statement containing the selling security holder
         information required by Item 507 or 508, as applicable, of Regulation
         S-K if the resales are of New Senior Notes obtained by such Holder in
         exchange for Senior Notes acquired by such Holder directly from the
         Partnership or an Affiliate thereof.

                  (iii) Prior to effectiveness of the Exchange Offer
         Registration Statement, the Partnership shall provide a supplemental
         letter to the Commission (A) stating that the

                                       -9-

<PAGE>

         Partnership is registering the Exchange Offer in reliance on the
         position of the Commission enunciated in Exxon Capital Holdings
         Corporation (available May 13, 1988), Morgan Stanley and Co., Inc.
         (available June 5, 1991) and, if applicable, any no-action letter
         obtained pursuant to clause (i) above, (B) including a representation
         that the Partnership has not entered into any arrangement or
         understanding with any Person to distribute the New Senior Notes to be
         received in the Exchange Offer and that, to the best of the
         Partnership's information and belief, each Holder participating in the
         Exchange Offer is acquiring the New Senior Notes in its ordinary course
         of business and has no arrangement or understanding with any Person to
         participate in the distribution of the New Senior Notes received in the
         Exchange Offer and (C) any other undertaking or representation required
         by the Commission as set forth in any no-action letter obtained
         pursuant to clause (i) above.

                  (b) Shelf Registration Statement. In connection with the Shelf
Registration Statement, the Partnership shall comply with all the provisions of
Section 6(c) below and shall use its reasonable best efforts to effect such
registration to permit the sale of the Transfer Restricted Securities being sold
in accordance with the intended method or methods of distribution thereof, and
pursuant thereto the Partnership will as expeditiously as possible, and in any
event within the time periods and otherwise in accordance with the provisions
hereof, prepare and file with the Commission a Registration Statement relating
to the registration on any appropriate form under the Securities Act, which form
shall be available for the sale of the Transfer Restricted Securities in
accordance with the intended method or methods of distribution thereof.

                  (c) General Provisions. In connection with any Registration
Statement and any Prospectus required by this Agreement to permit the sale or
resale of Transfer Restricted Securities (including, without limitation, any
Exchange Offer Registration Statement and the related Prospectus required to
permit resales of Transfer Restricted Securities by Restricted Broker-Dealers),
the Partnership shall:

                  (i) use its reasonable best efforts to keep such Registration
         Statement continuously effective and provide all requisite financial
         statements for the period specified in Section 3 or 4 of this
         Agreement, as applicable, or such shorter period as will terminate when
         all Transfer Restricted Securities covered by such Registration
         Statement have been sold; upon the occurrence of any event that would
         cause any such Registration Statement or the Prospectus contained
         therein (A) to contain a material misstatement or omission or (B) not
         to be effective and usable for resale of Transfer Restricted Securities
         during the period required by this Agreement, the Partnership shall (1)
         file promptly an appropriate amendment to such Registration Statement,
         in the case of clause (A), correcting any such misstatement or
         omission, and (2) in the case of either clause (A) or (B), use its
         reasonable best efforts to cause such amendment to be declared
         effective and such Registration Statement and the related Prospectus to
         become usable for their intended purpose(s) as soon as practicable
         thereafter;

                                      -10-

<PAGE>

                  (ii) prepare and file with the Commission such amendments and
         post-effective amendments to the Registration Statement as may be
         necessary to keep the Registration Statement effective for the
         applicable period set forth in Section 3 or 4 hereof, as applicable, or
         such shorter period as will terminate when all Transfer Restricted
         Securities covered by such Registration Statement have been sold; cause
         the Prospectus to be supplemented by any required Prospectus
         supplement, and as so supplemented to be filed pursuant to Rule 424
         under the Securities Act, and to comply fully with the applicable
         provisions of Rules 424, 430A and 462, as applicable under the
         Securities Act in a timely manner; and comply with the provisions of
         the Securities Act with respect to the disposition of all securities
         covered by such Registration Statement during the applicable period in
         accordance with the intended method or methods of distribution by the
         sellers thereof set forth in such Registration Statement or supplement
         to the Prospectus;

                  (iii) advise the managing underwriter(s), if any, and selling
         Holders promptly and, if requested by such Persons, to confirm such
         advice in writing, (A) when the Prospectus or any Prospectus supplement
         or post-effective amendment thereto has been filed, and, with respect
         to any Registration Statement or any post-effective amendment thereto,
         when the same has become effective, (B) of any request by the
         Commission for amendments to the Registration Statement or amendments
         or supplements to the Prospectus or for additional information relating
         thereto, (C) of the issuance by the Commission of any stop order
         suspending the effectiveness of the Registration Statement under the
         Securities Act or of the suspension by any state securities commission
         of the qualification of the Transfer Restricted Securities for offering
         or sale in any jurisdiction, or the initiation of any proceeding for
         any of the preceding purposes, (D) of the existence of any fact or the
         happening of any event that makes any statement of a material fact made
         in the Registration Statement, the Prospectus, any amendment or
         supplement thereto, or any document incorporated by reference therein
         untrue in any material respect, or that requires the making of any
         additions to or changes in the Registration Statement or the Prospectus
         in order to make the statements therein, in light of the circumstances
         under which they were made, not misleading. If at any time the
         Commission shall issue any stop order suspending the effectiveness of
         the Registration Statement, or any state securities commission or other
         regulatory authority shall issue an order suspending the qualification
         or exemption from qualification of the Transfer Restricted Securities
         under state securities or Blue Sky laws, the Partnership shall use its
         reasonable best efforts to obtain the withdrawal or lifting of such
         order at the earliest practicable time;

                  (iv) upon written request, furnish to the Initial Purchasers,
         and, upon written request, to each of the selling Holders and each of
         the managing underwriter(s) in connection with such sale, if any,
         before filing with the Commission, copies of any Registration Statement
         or any Prospectus included therein or any amendments or supplements to
         any such Registration Statement or Prospectus, which documents will be
         subject to the review of such selling Holders and underwriter(s) in
         connection with such sale, if any, for a period of at least five
         Business Days, and the Partnership will not file any such Registration
         Statement or Prospectus or any amendment or supplement to any such
         Registration Statement or

                                      -11-

<PAGE>

         Prospectus to which a selling Holder of Transfer Restricted Securities
         covered by such Registration Statement or the underwriter(s) in
         connection with such sale, if any, shall reasonably object within five
         Business Days after the receipt thereof. A selling Holder or managing
         underwriter in connection with such sale, if any, shall be deemed to
         have reasonably objected to such filing (A) if such Registration
         Statement, amendment, Prospectus or supplement, as applicable, as
         proposed to be filed, contains a material misstatement or omission or
         fails to comply with the applicable requirements of the Securities Act
         or (B) if any of the information furnished to the Partnership by the
         selling Holder or managing underwriter in connection with such sale, if
         any, and included in such Registration Statement, amendment, Prospectus
         or supplement, as applicable, as proposed to be filed is incorrect in
         any respect;

                  (v) upon written request, promptly prior to the filing of any
         document that is to be incorporated by reference into a Registration
         Statement or Prospectus, provide copies of such document to the selling
         Holders and to the underwriter(s) in connection with such sale, if any,
         make the Partnership's representatives available for discussion of such
         document and other customary due diligence matters, and include such
         information in such document prior to the filing thereof as such
         selling Holders or underwriters, if any, reasonably may request;

                  (vi) in the case of a shelf registration, make available at
         reasonable times for inspection by the selling Holders, any managing
         underwriter participating in the disposition pursuant to such
         Registration Statement, if any, and any attorney or accountant retained
         by such selling Holders or any of the underwriter(s), all relevant
         financial and other records, pertinent corporate documents and
         properties of the Partnership and cause the officers, directors and
         employees of the Partnership to supply all information reasonably
         requested by any such underwriter, attorney or accountant in connection
         with such Registration Statement or any post-effective amendment
         thereto subsequent to the filing thereof and prior to its
         effectiveness;

                  (vii) if requested by any selling Holders or the managing
         underwriter(s) in connection with such sale, if any, promptly
         incorporate in any Registration Statement or Prospectus, pursuant to a
         supplement or post-effective amendment if necessary, such information
         as such managing underwriter(s), if any, may request to have included
         therein, including, without limitation, information relating to the
         "Plan of Distribution" of the Transfer Restricted Securities,
         information with respect to the principal amount of Transfer Restricted
         Securities being sold to such underwriter(s), the purchase price being
         paid therefor and any other terms of the offering of the Transfer
         Restricted Securities to be sold in such offering; and make all
         required filings of such Prospectus supplement or post-effective
         amendment as soon as practicable after the Partnership is notified of
         the matters to be incorporated in such Prospectus supplement or
         post-effective amendment;

                  (viii) cause the Transfer Restricted Securities covered by the
         Registration Statement to be rated by the appropriate rating agencies,
         if so requested by the Holders of a majority in

                                      -12-

<PAGE>

         aggregate principal amount of Notes covered thereby or the managing
         underwriter(s) in connection with such sale, if any, unless such
         Transfer Restricted Securities are already so rated;

                  (ix) furnish to each selling Holder and each of the managing
         underwriter(s) in connection with such sale, if any, without charge, at
         least one copy of the Registration Statement, as first filed with the
         Commission, and of each amendment thereto, including all documents
         incorporated by reference therein and all exhibits (including exhibits
         incorporated therein by reference);

                  (x) deliver to each selling Holder and each of the managing
         underwriter(s), if any, without charge, as many copies of the
         Prospectus (including each preliminary prospectus) and any amendment or
         supplement thereto as such Persons reasonably may request; the
         Partnership hereby consents to the use of the Prospectus and any
         amendment or supplement thereto by each of the selling Holders and each
         of the underwriter(s), if any, in connection with the offering and the
         sale of the Transfer Restricted Securities covered by the Prospectus or
         any amendment or supplement thereto;

                  (xi) enter into such agreements (including an underwriting
         agreement), and make such representations and warranties with respect
         to the business of the Partnership as are customarily addressed in
         representations and warranties made by issuers to underwriters in
         underwritten offerings, and take all such other actions in connection
         therewith in order to expedite or facilitate the disposition of the
         Transfer Restricted Securities pursuant to any Registration Statement
         contemplated by this Agreement, all to such extent as may be requested
         by the Initial Purchasers or by any Holder of Transfer Restricted
         Securities or managing underwriter in connection with any sale or
         resale pursuant to any Registration Statement contemplated by this
         Agreement; and whether or not an underwriting agreement is entered into
         and whether or not the registration is an Underwritten Registration,
         the Partnership shall:

                           (A) furnish to each Initial Purchaser, each selling
                  Holder and each managing underwriter, if any, in such
                  substance and scope as they may reasonably request and as are
                  customarily made by issuers to underwriters in primary
                  underwritten offerings, upon the date of the Consummation of
                  the Exchange Offer and, if applicable, the effectiveness of
                  the Shelf Registration Statement:

                           (1) a certificate, dated the date of Consummation of
                  the Exchange Offer or the date of effectiveness of the Shelf
                  Registration Statement, as the case may be, signed on behalf
                  of the Partnership by any Authorized Officer, confirming, as
                  of the date thereof, the matters set forth in paragraph (g) of
                  Section 7 of the Purchase Agreement and such other matters as
                  such parties may reasonably request;

                                      -13-

<PAGE>

                           (2) opinions, dated the date of Consummation of the
                  Exchange Offer or of effectiveness of the Shelf Registration
                  Statement, as the case may be, of counsel or counsels for the
                  Partnership, covering the matters set forth in paragraphs (c)
                  and (d) of Section 7 of the Purchase Agreement and such other
                  matters as such parties may reasonably request, and in any
                  event including a statement to the effect that such counsel
                  for the Partnership has participated in conferences with
                  officers of the Partnership and other representatives of the
                  Partnership, representatives of the independent public
                  accountants for the Partnership and representatives of and
                  counsel to the Initial Purchasers at which the contents of
                  such Registration Statement and the related Prospectus were
                  discussed and, although such counsel is not passing upon and
                  does not assume any responsibility for the accuracy,
                  completeness or fairness of the statements contained therein
                  (except as specifically stated in such opinion), on the basis
                  of the foregoing, no facts have come to the attention of such
                  counsel that have caused such counsel to believe that the
                  applicable Registration Statement, at the time such
                  Registration Statement or any post-effective amendment thereto
                  became effective, and, in the case of the Exchange Offer
                  Registration Statement, as of the date of Consummation,
                  contained an untrue statement of a material fact or omitted to
                  state a material fact required to be stated therein or
                  necessary to make the statements therein, in light of the
                  circumstances under which they were made, not misleading, or
                  that the Prospectus contained in such Registration Statement
                  as of its date and, in the case of the opinion dated the date
                  of Consummation of the Exchange Offer, as of the date of
                  Consummation, contained an untrue statement of a material fact
                  or omitted to state a material fact necessary in order to make
                  the statements therein, in light of the circumstances under
                  which they were made, not misleading (it being understood that
                  such counsel need make no comment as to the financial
                  statements and related statistical or financial information
                  and schedules included in any Registration Statement
                  contemplated by this Agreement or the related Prospectus); and

                           (3) customary comfort letters, dated as of the date
                  of Consummation of the Exchange Offer or the date of
                  effectiveness of the Shelf Registration Statement, as the case
                  may be, from the Partnership's independent accountants, in the
                  customary form and covering matters of the type customarily
                  covered in comfort letters by underwriters in connection with
                  Underwritten Offerings, and affirming the matters set forth in
                  the comfort letters delivered pursuant to Section 7(e) and (f)
                  of the Purchase Agreement, without exception;

                           (B) set forth in full or incorporate by reference in
                  the underwriting agreement, if any, the indemnification
                  provisions and procedures of Section 8 hereof with respect to
                  all parties to be indemnified pursuant to said Section; and

                           (C) deliver such other documents and certificates as
                  may be reasonably requested by such parties to evidence
                  compliance with clause (A) above and with any

                                      -14-

<PAGE>

                  customary conditions contained in the underwriting agreement
                  or other agreement entered into by the Partnership pursuant to
                  this clause (xi), if any.

                  The above shall be done at each closing under such
         underwriting or similar agreement, as and to the extent required
         thereunder, and, if at any time the representations and warranties of
         the Partnership contemplated in clause (A)(1) above cease to be true
         and correct in any material respect, the Partnership shall so advise
         the Initial Purchasers and the managing underwriter(s), if any, each
         selling Holder and each Restricted Broker-Dealer promptly and, if
         requested by such Persons, shall confirm such advice in writing;

                  (xii) prior to any public offering of Transfer Restricted
         Securities, cooperate with the selling Holders, the managing
         underwriter(s), if any, and its counsel in connection with the
         registration and qualification of the Transfer Restricted Securities
         under the securities or Blue Sky laws of such jurisdictions in the
         United States as the selling Holders or managing underwriter(s), if
         any, may request and do any and all other acts or things necessary or
         advisable to enable the disposition in such jurisdictions of the
         Transfer Restricted Securities covered by the applicable Registration
         Statement; provided, however, that the Partnership shall not be
         required to register or qualify as a foreign entity where it is not now
         so qualified or to take any action that would subject it to the service
         of process in suits or to taxation, other than as to matters and
         transactions relating to the Registration Statement, in any
         jurisdiction where it is not now so subject;

                  (xiii) shall issue, upon the request of any Holder of Senior
         Notes covered by any Shelf Registration Statement contemplated by this
         Agreement, New Senior Notes, having an aggregate principal amount equal
         to the aggregate principal amount of the Senior Notes surrendered to
         the Partnership by such Holder in exchange therefor or being sold by
         such Holder; such New Senior Notes to be registered in the name of such
         Holder or in the name of the purchaser(s) of such Notes, as the case
         may be; in return, the Senior Notes held by such Holder shall be
         surrendered to the Partnership for cancellation;

                  (xiv) cooperate with the selling Holders and the managing
         underwriter(s), if any, to facilitate the timely preparation and
         delivery of certificates representing Transfer Restricted Securities to
         be sold and not bearing any restrictive legends; and enable such
         Transfer Restricted Securities to be in such denominations and
         registered in such names as the Holders or the underwriter(s), if any,
         may request at least two Business Days prior to any sale of Transfer
         Restricted Securities made by such underwriter(s);

                  (xv) use its reasonable best efforts to cause the disposition
         of the Transfer Restricted Securities covered by the Registration
         Statement to be registered with or approved by such other governmental
         agencies or authorities as may be necessary to enable the seller or
         sellers thereof or the underwriter(s), if any, to consummate the
         disposition of such Transfer Restricted Securities, subject to the
         proviso contained in clause (xii) above;

                                      -15-

<PAGE>

                  (xvi) subject to Section 6(c)(i), if any fact or event
         contemplated by clause 6(c)(iii)(D) above shall exist or have occurred,
         prepare a supplement or post-effective amendment to the Registration
         Statement or related Prospectus or any document incorporated therein by
         reference or file any other required document so that, as thereafter
         delivered to the purchasers of Transfer Restricted Securities, the
         Prospectus will not contain an untrue statement of a material fact or
         omit to state any material fact necessary to make the statements
         therein in the light of the circumstances under which they were made
         not misleading;

                  (xvii) provide a CUSIP number for all Transfer Restricted
         Securities not later than the effective date of the Registration
         Statement covering such Transfer Restricted Securities and provide the
         Trustee under the Indenture with printed certificates for the Transfer
         Restricted Securities which are in a form eligible for deposit with The
         Depository Trust Company;

                  (xviii) cooperate and assist in any filings required to be
         made with the NASD and in the performance of any due diligence
         investigation by any underwriter (including any "qualified independent
         underwriter" that is required to be retained in accordance with the
         rules and regulations of the NASD), and use its reasonable best efforts
         to cause such Registration Statement to become effective and approved
         by such governmental agencies or authorities as may be necessary to
         enable the Holders selling Transfer Restricted Securities to consummate
         the disposition of such Transfer Restricted Securities;

                  (xix) otherwise use its reasonable best efforts to comply with
         all applicable rules and regulations of the Commission, and make
         generally available to its security holders, as soon as practicable, a
         consolidated earnings statement meeting the requirements of Rule 158
         (which need not be audited) for the twelve-month period (A) commencing
         at the end of any fiscal quarter in which Transfer Restricted
         Securities are sold to underwriters in a firm or reasonable best
         efforts Underwritten Offering or (B) if not sold to underwriters in
         such an offering, beginning with the first month of the Partnership's
         first fiscal quarter commencing after the effective date of the
         Registration Statement;

                  (xx) cause the Indenture to be qualified under the TIA not
         later than the effective date of the first Registration Statement
         required by this Agreement, and, in connection therewith, cooperate
         with the Trustee and the Holders of Notes to effect such changes to the
         Indenture as may be required for such Indenture to be so qualified in
         accordance with the terms of the TIA; and execute and use its
         reasonable best efforts to cause the Trustee to execute, all documents
         that may be required to effect such changes and all other forms and
         documents required to be filed with the Commission to enable such
         Indenture to be so qualified in a timely manner;

                  (xxi) cause all Transfer Restricted Securities covered by the
         Registration Statement to be listed on each securities exchange on
         which similar securities issued by the Partnership

                                      -16-

<PAGE>

         are then listed if requested by the Holders of a majority in aggregate
         principal amount of Senior Notes or the managing underwriter(s), if
         any; and

                  (xxii) promptly provide or make available to the Holders of
         the Notes, all financial information and reports at the time and in the
         manner provided for in Section 4.03 of the Indenture.

                  (d) Restrictions on Holders. (i) Each Holder agrees by
acquisition of a Transfer Restricted Security that, upon receipt of the notice
from the Partnership of the existence of any fact of the kind described in
Section 6(c)(iii)(D) hereof, such Holder will forthwith discontinue disposition
of Transfer Restricted Securities pursuant to the applicable Registration
Statement until such Holder's receipt of the copies of the supplemented or
amended Prospectus contemplated by Section 6(c)(xvi) hereof, or until it is
advised in writing (the "Advice") by the Partnership that the use of the
Prospectus may be resumed, and has received copies of any additional or
supplemental filings that are incorporated by reference in the Prospectus. If so
directed by the Partnership, each Holder will deliver to the Partnership (at the
Partnership's expense) all copies, other than permanent file copies then in such
Holder's possession, of the Prospectus covering such Transfer Restricted
Securities that was current at the time of receipt of such notice. In the event
the Partnership shall give any such notice, the time period regarding the
effectiveness of such Registration Statement set forth in Section 3 or 4 hereof,
as applicable, shall be extended by the number of days during the period from
and including the date of the giving of such notice pursuant to Section 6(c)(i)
or Section 6(c)(iii)(D) hereof to and including the date when each selling
Holder covered by such Registration Statement shall have received the copies of
the supplemented or amended Prospectus contemplated by Section 6(c)(xvi) hereof
or shall have received the Advice.

                  (ii) The Partnership may require a Holder of Transfer
Restricted Securities to be included in a Registration Statement to furnish to
the Partnership such information as required by law to be disclosed by such
Holder in such Registration Statement, and the Partnership may exclude from such
Registration Statement the Transfer Restricted Securities of any Holder who
unreasonably fails to furnish such information within a reasonable time after
receiving such request.

SECTION 7.        REGISTRATION EXPENSES

                  All expenses incident to the Partnership's performance of or
compliance with this Agreement will be borne by the Partnership, regardless of
whether a Registration Statement becomes effective, including, without
limitation: (i) all registration and filing fees and expenses (including filings
made by any Initial Purchaser or Holder with the NASD (and, if applicable, the
fees and expenses of any "qualified independent underwriter") and its counsel
that may be required by the rules and regulations of the NASD); (ii) all fees
and expenses of compliance with federal securities and state Blue Sky or
securities laws; (iii) all expenses of printing (including printing certificates
for the New Senior Notes to be issued in the Exchange Offer and printing of
Prospectuses); (iv) all fees and disbursements of counsel for the Partnership;
(v) all messenger and delivery services and telephone expenses of the
Partnership; and (vi) all fees and disbursements of independent certified

                                      -17-

<PAGE>

public accountants of the Partnership (including the expenses of any special
audit and comfort letters required by or incident to such performance).

                  The Partnership will, in any event, bear its internal expenses
(including, without limitation, all salaries and expenses of any of the
Partnership's officers and employees performing legal or accounting duties), the
expenses of any annual audit and the fees and expenses of any Person, including
special experts, retained by the Partnership.

SECTION 8.        INDEMNIFICATION

                  (a) The Partnership shall indemnify and hold harmless each
Holder, its directors, officers and employees and each Person, if any, who
controls such Holder within the meaning of Section 15 of the Securities Act and
Section 20 of the Exchange Act, from and against any and all losses, claims,
damages, liabilities, judgments and actions, joint or several, or any action in
respect thereof (including, but not limited to, any loss, claim, damage,
liability, judgment or action relating to purchases and sales of Notes), to
which that Holder, its directors, officers, employees or controlling Persons may
become subject, under the Securities Act or otherwise, insofar as such loss,
claim, damage, liability, judgment or action arises out of, or is based upon,
(i) any untrue statement or alleged untrue statement of a material fact
contained (A) in any Registration Statement, Preliminary Prospectus or
Prospectus or in any amendment or supplement thereto or (B) in any Blue Sky
application or other document prepared or executed by the Partnership (or based
upon any written information furnished by the Partnership) specifically for the
purpose of qualifying any or all of the Notes under the securities laws of any
state or other jurisdiction (any such application, document or information being
hereinafter called a "Blue Sky Application") or (ii) the omission or alleged
omission to state in any Registration Statement, Preliminary Prospectus or
Prospectus, or in any amendment or supplement thereto, or in any Blue Sky
Application any material fact required to be stated therein or necessary to make
the statements therein not misleading, and shall reimburse such Holder and each
director, officer, employee or controlling Person promptly upon demand for any
legal or other expenses reasonably incurred by such Holder, director, officer,
employee or controlling Person in connection with investigating or defending or
preparing to defend against any such loss, claim, damage, liability, judgment or
action as such expenses are incurred; provided, however, that the Partnership
shall not be liable in any such case to the extent that any such loss, claim,
damage, liability, judgment or action arises out of, or is based upon, any
untrue statement or alleged untrue statement or omission or alleged omission
made in any Registration Statement, Preliminary Prospectus or Prospectus, or in
any such amendment or supplement or in any Blue Sky Application in reliance upon
and in conformity with written information furnished to the Partnership by or on
behalf of such Holder specifically for inclusion therein.

                  (b) Each Holder, severally and not jointly, shall indemnify
and hold harmless the Partnership, the Partnership Policy Committee of the
Partnership, the Audit Committee of the Partnership, the employees and officers
of the Partnership, the General Partners, the employees and officers of the
General Partners, and each Person, if any, who controls the Partnership within
the meaning of Section 15 of the Securities Act and Section 20 of the Exchange
Act (collectively, the

                                      -18-

<PAGE>

"Partnership Indemnitees"), from and against any and all losses, claims,
damages, liabilities, judgments or actions, joint or several, or any action in
respect thereof, to which the Partnership Indemnitees may become subject, under
the Securities Act or otherwise, insofar as such loss, claim, damage, liability,
judgment or action arises out of, or is based upon, (i) any untrue statement or
alleged untrue statement of a material fact contained in any Registration
Statement, Preliminary Prospectus or Prospectus or in any amendment or
supplement thereto or (ii) the omission or alleged omission to state in any
Registration Statement, Preliminary Prospectus or Prospectus, or in any
amendment or supplement thereto, or in any Blue Sky Memorandum any material fact
required to be stated therein or necessary to make the statements therein not
misleading, but in each case only to the extent that the untrue statement or
alleged untrue statement or omission or alleged omission was made in reliance
upon and in conformity with written information furnished to the Partnership by
or on behalf of such Holder specifically for inclusion therein and described in
Section 8(e), and shall reimburse the Partnership Indemnitee or controlling
Person for any legal or other expenses reasonably incurred by the Partnership
Indemnitee in connection with investigating or defending or preparing to defend
against any such loss, claim, damage, liability, judgment or action as such
expenses are incurred. The foregoing indemnity agreement is in addition to any
liability which any Holder may otherwise have to the Partnership Indemnitees.

                  (c) Promptly after receipt by any indemnified party under this
Section 8 of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect thereof is to be made against the
indemnifying party under this Section 8, notify the indemnifying party in
writing of the claim or the commencement of that action; provided, however, that
the failure to notify the indemnifying party shall not relieve it from any
liability which it may have under this Section 8 except to the extent it has
been materially prejudiced by such failure and, provided further, that the
failure to notify the indemnifying party shall not relieve it from any liability
which it may have to an indemnified party otherwise than under this Section 8.
If any such claim or action shall be brought against an indemnified party, and
it shall notify the indemnifying party thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it wishes, jointly with
any other similarly notified indemnifying party, to assume the defense thereof
with counsel satisfactory to the indemnified party and the payment of all fees
and expenses of such counsel shall be the responsibility of the indemnifying
party. After notice from the indemnifying party to the indemnified party of its
election to assume the defense of such claim or action, the indemnifying party
shall not be liable to the indemnified party under this Section 8 for any legal
or other expenses subsequently incurred by the indemnified party in connection
with the defense thereof other than reasonable costs of investigation, provided,
however, that the indemnified party shall have the right to employ separate
counsel to represent all indemnified parties who may be subject to liability
arising out of any claim in respect of which indemnity may be sought by the
indemnified parties against the indemnifying parties under this Section 8 if,
(i) the employment of such counsel shall have been specifically authorized in
writing by the indemnifying party, (ii) the indemnifying party shall have failed
to assume the defense of such action or employ counsel reasonably satisfactory
to the indemnified party or (iii) counsel for any of the indemnified parties
shall have reasonably concluded that there may be defenses available to the
indemnified parties that are in addition to or in conflict with those available
to the indemnifying party. In any case, the indemnifying party shall not, in

                                      -19-

<PAGE>

connection with any one action or separate but substantially similar or related
actions in the same jurisdiction arising out of the same general allegations or
circumstances, be liable for the fees and expenses of more than one separate
firm of attorneys (in addition to any local counsel) of all indemnified parties,
and all such fees and expenses shall be reimbursed as they are incurred. Such
firm shall be designated in writing by BOA, in the case of the parties
indemnified pursuant to Section 8(a) and by the Partnership, in the case of
parties indemnified pursuant to Section 8(b). No indemnifying party shall (i)
without the prior written consent of the indemnified parties (which consent
shall not be unreasonably withheld), settle or compromise or consent to the
entry of any judgment with respect to any pending or threatened claim, action,
suit or proceeding in respect of which indemnification or contribution may be
sought hereunder (whether or not the indemnified parties are actual or potential
parties to such claim or action) unless such settlement, compromise or consent
includes an unconditional release of each indemnified party from all liability
arising out of such claim, action, suit or proceeding, or (ii) be liable for any
settlement of any such action effected without its written consent (which
consent shall not be unreasonably withheld), but if settled with the consent of
the indemnifying party or if there be a final judgment of the plaintiff in any
such action, the indemnifying party agrees to indemnify and hold harmless any
indemnified party from and against any loss or liability by reason of such
settlement or judgment.

                  (d) If the indemnification provided for in this Section 8
shall for any reason be unavailable or insufficient to hold harmless an
indemnified party under Section 8(a) or 8(b) in respect of any loss, claim,
damage, liability, judgment or any action in respect thereof, referred to
therein, then each indemnifying party shall, in lieu of indemnifying such
indemnified party, contribute to the amount paid or payable by such indemnified
party as a result of such loss, claim, damage, liability, judgment or action in
respect thereof, (i) in such proportion as shall be appropriate to reflect the
relative benefits received by the Partnership, on the one hand, and the Holders,
on the other, from the offering of the Notes or (ii) if the allocation provided
by clause (i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Partnership, on the one hand, and the
Holders, on the other, with respect to the statements or omissions which
resulted in such loss, claim, damage, liability, judgment or action in respect
thereof, as well as any other relevant equitable considerations. The relative
benefits received by the Partnership, on the one hand, and the Holders, on the
other, with respect to such offering shall be deemed to be in the same
proportion as the total net proceeds from the offering of the Notes purchased
under the Purchase Agreement (before deducting expenses) received by the
Partnership as set forth in the table on the cover page of the Memorandum, on
the one hand, and the total net proceeds received by such Holder upon its resale
of Notes less the amount paid by such Holder for such Notes, on the other hand,
bear to the total sum of such amounts. The relative fault shall be determined by
reference to whether the untrue or alleged untrue statement of a material fact
or omission or alleged omission to state a material fact relates to information
supplied by the Partnership or such Holder, the intent of the parties and their
relative knowledge, access to information and opportunity to correct or prevent
such statement or omission. The Partnership and the Holders agree that it would
not be just and equitable if contributions pursuant to this Section 8 were to be
determined by pro rata allocation or by any other method of allocation which
does not take into account the equitable considerations referred to herein. The

                                      -20-

<PAGE>

amount paid or payable by an indemnified party as a result of the loss, claim,
damage, liability, judgment or action in respect thereof, referred to above in
this Section 8 shall be deemed to include, for purposes of this Section 8(d),
any legal or other expenses reasonably incurred by such indemnified party in
connection with investigating or defending any such action or claim.
Notwithstanding the provisions of this Section 8(d), no Holder, and none of its
directors, officers, employees or controlling Persons, shall be required to
contribute, in the aggregate, any amount in excess of the amount by which the
total net proceeds received by such Holder upon its resale of Notes exceeds the
sum of the amount paid by such Holder for such Notes and the amount of any
damages which such Holder has otherwise paid or become liable to pay by reason
of any untrue or alleged untrue statement or omission or alleged omission. No
Person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any Person
who was not guilty of such fraudulent misrepresentation. The Holders'
obligations to contribute as provided in this Section 8(d) are several in
proportion to the respective principal amount of Notes held by each of the
Holders hereunder and not joint.

                  (e) The Holders severally confirm, and the Partnership
acknowledges, that the statements with respect to the offering of the Notes set
forth in the bottom paragraph on the cover page of, and the disclosure in the
second, fifth and seventh through tenth paragraphs under the caption "Plan of
Distribution" in the Memorandum are correct and constitute the only information
furnished in writing to the Partnership by or on behalf of the Holders
specifically for inclusion in the Memorandum.

SECTION 9.        RULE 144A

                  The Partnership hereby agrees with each Holder, for so long as
any Transfer Restricted Securities remain outstanding and during any period in
which the Partnership is not subject to Section 13 or 15(d) of the Exchange Act,
to make available to any Holder or beneficial owner of Transfer Restricted
Securities in connection with any sale thereof and any prospective purchaser of
such Transfer Restricted Securities from such Holder or beneficial owner, the
information required by Rule 144A(d)(4) under the Securities Act in order to
permit resales of such Transfer Restricted Securities pursuant to Rule 144A.

SECTION 10.       PARTICIPATION IN UNDERWRITTEN REGISTRATION

                  No Holder may participate in any Underwritten Registration
hereunder unless such Holder (a) agrees to sell such Holder's Transfer
Restricted Securities on the basis provided in any underwriting arrangements
approved by the Persons entitled hereunder to approve such arrangements and (b)
completes and executes all reasonable questionnaires, powers of attorney,
indemnities, underwriting agreements, lock-up letters and other documents
required under the terms of such underwriting arrangements.

                                      -21-

<PAGE>

SECTION 11.       SELECTION OF UNDERWRITERS

                  For any Underwritten Offering, the investment banker or
investment bankers and manager or managers that will administer such offering
will be selected by the Holders of a majority in aggregate principal amount of
the Transfer Restricted Securities included in such offering; provided, that
such investment bankers and managers must be reasonably satisfactory to the
Partnership. Such investment bankers and managers are referred to herein as the
"managing underwriters."

SECTION 12.       MISCELLANEOUS

                  (a) Remedies. Each Holder, in addition to being entitled to
exercise all rights provided herein, in the Indenture, the Purchase Agreement or
granted by law, including recovery of liquidated or other damages, will be
entitled to specific performance of its rights under this Agreement. The
Partnership agrees that monetary damages (including the Liquidated Damages
contemplated hereby) would not be adequate compensation for any loss incurred by
reason of a breach by them of the provisions of this Agreement and hereby agree
to waive the defense in any action for specific performance that a remedy at law
would be adequate.

                  (b) No Inconsistent Agreements. The Partnership will not on or
after the date of this Agreement, enter into any agreement with respect to its
securities that is inconsistent with the rights granted to the Holders in this
Agreement or otherwise conflicts with the provisions hereof. The Partnership is
not currently bound by any agreement granting registration rights with respect
to its securities that conflicts with the registration rights set forth herein.

                  (c) Adjustments Affecting the Notes. The Partnership will not
take any action, or permit any change to occur, with respect to the Notes that
would materially and adversely affect the ability of the Holders to Consummate
any Exchange Offer.

                  (d) Amendments and Waivers. The provisions of this Agreement
may not be amended, modified or supplemented, and waivers or consents to or
departures from the provisions hereof may not be given unless (i) in the case of
Section 5 hereof and this Section 12(d), the Holders of all outstanding Transfer
Restricted Securities and (ii) in the case of all other provisions hereof, the
Partnership has obtained the written consent of Holders of a majority of the
outstanding principal amount of Transfer Restricted Securities. Notwithstanding
the foregoing, a waiver or consent to departure from the provisions hereof that
relates exclusively to the rights of Holders whose securities are being tendered
pursuant to the Exchange Offer and that does not affect directly or indirectly
the rights of other Holders whose securities are not being tendered pursuant to
such Exchange Offer may be given by the Holders of a majority of the outstanding
principal amount of Transfer Restricted Securities being tendered or registered.

                                      -22-

<PAGE>

                  (e) Notices. All notices and other communications provided for
or permitted hereunder shall be made in writing by hand-delivery, first-class
mail (registered or certified, return receipt requested), telex, telecopier, or
air courier guaranteeing overnight delivery:

                  (i)   if to a Holder, at the address set forth on the records
         of the Registrar under the Indenture, with a copy to the Registrar
         under the Indenture; and

                           With a copy to:

                                    Banc of America Securities, LLC
                                    100 North Tryon Street
                                    Charlotte, North Carolina 28255
                                    Attention: Syndicate Operations
                                    Telecopy No.: (704) 388-9212

                  (ii)  if to the Initial Purchasers, to the Initial Purchasers'
         address specified in Section 12(a) of the Purchase Agreement.

                  (iii) if to the Partnership:

                                    Northern Border Partners, L.P.
                                    c/o Northern Plains Natural Gas Company
                                    1111 South 103rd Street
                                    Omaha, Nebraska 68124-1000
                                    Telecopy No.: (402) 398-7871
                                    Attention: Director of Finance

                  All such notices and communications shall be deemed to have
been duly given: at the time delivered by hand, if personally delivered; five
Business Days after being deposited in the mail, postage prepaid, if mailed;
when answered back, if telexed; when receipt acknowledged, if telecopied; and on
the next Business Day, if timely delivered to an air courier guaranteeing
overnight delivery.

                  Copies of all such notices, demands or other communications
shall be concurrently delivered by the Person giving the same to the Trustee at
the address specified in the Indenture.

                  (f) Successors and Assigns. This Agreement shall inure to the
benefit of and be binding upon the successors and assigns of each of the
parties, including without limitation and without the need for an express
assignment, subsequent Holders of Transfer Restricted Securities; provided,
however, that nothing herein shall be deemed to permit any assignment, transfer
or other disposition of Transfer Restricted Securities in violation of the terms
hereof or of the Purchase Agreement or the Indenture. If any transferee of any
Holder shall acquire Transfer Restricted

                                      -23-

<PAGE>

Securities in any manner, whether by operation of law or otherwise, such
Transfer Restricted Securities shall be held subject to all of the terms of this
Agreement, and by owning and holding such Transfer Restricted Securities such
Person shall be conclusively deemed to have agreed to be bound by and to perform
all of the terms and provisions of this Agreement, including the restrictions on
resale set forth in this Agreement and, if applicable, the Purchase Agreement,
and such Person shall be entitled to receive the benefits hereof.

                  (g) Counterparts. This Agreement may be executed in any number
of counterparts and by the parties hereto in separate counterparts, each of
which when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

                  (h) Headings. The headings in this Agreement are for
convenience of reference only and shall not limit or otherwise affect the
meaning hereof.

                  (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK, AS
APPLIED TO CONTRACTS MADE AND PERFORMED ENTIRELY WITHIN THE STATE OF NEW YORK.

                  (j) Severability. In the event that any one or more of the
provisions contained herein, or the application thereof in any circumstance, is
held invalid, illegal or unenforceable by a court of competent jurisdiction, the
validity, legality and enforceability of any such provision in every other
respect and of the remaining provisions contained herein shall not be affected
or impaired thereby.

                  (k) Entire Agreement. This Agreement is intended by the
parties as a final expression of their agreement and intended to be a complete
and exclusive statement of the agreement and understanding of the parties hereto
in respect of the subject matter contained herein. There are no restrictions,
promises, warranties or undertakings, other than those set forth or referred to
herein with respect to the registration rights granted by the Partnership with
respect to the Transfer Restricted Securities. This Agreement supersedes all
prior agreements and understandings between the parties with respect to such
subject matter.

                  (l) No Personal Liability. None of the members of the
Partnership Policy Committee or the General Partners or the General Partners'
directors, officers, employees, partners, incorporators or stockholders, if any,
shall have any liability for any of the Partnership's obligations under the
notes or the indenture or hereunder or for any claim based on, in respect of, or
by reason of, such obligations or their creation.

                                      -24-

<PAGE>

                  IN WITNESS WHEREOF, the parties have executed this Agreement
as of the date first written above.

                                      NORTHERN BORDER PARTNERS, L.P.

                                      By: /s/ Jerry L. Peters
                                          --------------------------------------
                                      Name:    Jerry L. Peters
                                      Title:   Chief Financial and Accounting
                                               Officer

                                      NORTHERN BORDER INTERMEDIATE LIMITED
                                      PARTNERSHIP

                                      By: /s/ Jerry L. Peters
                                          --------------------------------------
                                      Name:    Jerry L. Peters
                                      Title:   Chief Financial and Accounting
                                               Officer

BANC OF AMERICA SECURITIES LLC
BANC ONE CAPITAL MARKETS, INC.
SUNTRUST EQUITABLE SECURITIES

By:  BANC OF AMERICA SECURITIES LLC

By:  /s/ Lynn McConnell
     --------------------------------
     Name: Lynn T. McConnell
     Title:   Managing Director

<PAGE>

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