1
 
                                                                [CONFORMED COPY]
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                     UNION TEXAS PETROLEUM HOLDINGS, INC.,
 
                                                                   AS ISSUER,
 
                          THE GUARANTORS NAMED HEREIN,
 
                                                               AS GUARANTORS,
 
                                      AND

 
                      THE FIRST NATIONAL BANK OF CHICAGO,
 
                                                                   AS TRUSTEE
                            ------------------------

 
                                   INDENTURE

 
                    DATED AS OF                      , 1994


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

 
                                  $200,000,000
 
                                % SENIOR NOTES DUE 2004


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                             CROSS-REFERENCE TABLE*
 


TRUST INDENTURE
 ACT SECTION                                                               INDENTURE SECTION
- --------------                                                             -----------------

                                                                            
310  (a) (1).................................................................  7.10
     (a) (2).................................................................  7.10
     (a) (3).................................................................  N.A.
     (a) (4).................................................................  N.A.
     (b) ....................................................................  7.08; 7.10
     (c) ....................................................................  N.A.
311  (a) ....................................................................  7.11
     (b) ....................................................................  7.11
     (c) ....................................................................  N.A.
312  (a) ....................................................................  2.05
     (b) ....................................................................  11.03
     (c) ....................................................................  11.03
313  (a) ....................................................................  7.06
     (b) ....................................................................  7.06
     (c) ....................................................................  7.06
     (d) ....................................................................  7.06
314  (a) ....................................................................  4.03
     (b) ....................................................................  N.A.
     (c) (1).................................................................  11.04
     (c) (2).................................................................  11.04
     (c) (3).................................................................  N.A.
     (d) ....................................................................  N.A.
     (e) ....................................................................  11.05
     (f) ....................................................................  N.A.
315  (a) ....................................................................  7.01(2)
     (b) ....................................................................  7.05
     (c) ....................................................................  7.01(1)
     (d) ....................................................................  7.01(3)
     (e) ....................................................................  6.11
316  (a) (last sentence).....................................................  2.09
     (a) (1)(A)..............................................................  6.05
     (a) (1)(B)..............................................................  6.04
     (a) (2).................................................................  N.A.
     (b) ....................................................................  6.07
     (c) ....................................................................  9.04
317  (a) (1).................................................................  6.08
     (a) (2).................................................................  6.09
     (b) ....................................................................  2.04
318  (a) ....................................................................  11.01

 
- ------------
N.A. means not applicable
*This Cross-Reference Table is not part of the Indenture
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                               TABLE OF CONTENTS
 
                                   ARTICLE 1
 
                   DEFINITIONS AND INCORPORATION BY REFERENCE
 


                                                                                          PAGE
                                                                                    
SECTION 1.01     Definitions...........................................................     1
SECTION 1.02     Other Definitions.....................................................     6
SECTION 1.03     Incorporation by Reference of Trust Indenture Act.....................     6
SECTION 1.04     Rules of Construction.................................................     6
                                          ARTICLE 2
                                        THE SECURITIES
SECTION 2.01     Form and Dating.......................................................     6
SECTION 2.02     Execution and Authentication..........................................     7
SECTION 2.03     Registrar and Paying Agent............................................     7
SECTION 2.04     Paying Agent to Hold Money in Trust...................................     7
SECTION 2.05     Holder Lists..........................................................     7
SECTION 2.06     Transfer and Exchange.................................................     8
SECTION 2.07     Replacement Securities................................................     8
SECTION 2.08     Outstanding Securities................................................     8
SECTION 2.09     Treasury Securities...................................................     9
SECTION 2.10     Temporary Securities..................................................     9
SECTION 2.11     Cancellation..........................................................     9
SECTION 2.12     Defaulted Interest....................................................     9
SECTION 2.13     Persons Deemed Owners.................................................     9
                                          ARTICLE 3
                                          REDEMPTION
SECTION 3.01     Notices to Trustee....................................................     9
SECTION 3.02     Selection of Securities to be Redeemed................................    10
SECTION 3.03     Notices to Holders....................................................    10
SECTION 3.04     Effect of Notice of Redemption........................................    10
SECTION 3.05     Deposit of Redemption Price...........................................    11
SECTION 3.06     Securities Redeemed in Part...........................................    11
SECTION 3.07     Optional Redemption...................................................    11
                                          ARTICLE 4
                                          COVENANTS
SECTION 4.01     Payment of Securities.................................................    11
SECTION 4.02     Maintenance of Office or Agency.......................................    11
SECTION 4.03     SEC Reports; Financial Statements.....................................    12
SECTION 4.04     Compliance Certificate................................................    12
SECTION 4.05     Corporate Existence...................................................    13
SECTION 4.06     Maintenance of Properties.............................................    13

 
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                                                                                          PAGE
                                                                                    
SECTION 4.07     Payment of Taxes and Other Claims.....................................    13
SECTION 4.08     Limitation on Sale/Leaseback Transactions.............................    14
SECTION 4.09     Limitation on Liens...................................................    14
                                          ARTICLE 5
                                          SUCCESSORS
SECTION 5.01     Limitations on Mergers and Consolidations.............................    15
SECTION 5.02     Successor Corporation Substituted.....................................    16
                                          ARTICLE 6
                                    DEFAULTS AND REMEDIES
SECTION 6.01     Events of Default.....................................................    16
SECTION 6.02     Acceleration..........................................................    17
SECTION 6.03     Other Remedies........................................................    18
SECTION 6.04     Waiver of Existing Defaults...........................................    18
SECTION 6.05     Control by Majority...................................................    18
SECTION 6.06     Limitations on Suits..................................................    18
SECTION 6.07     Rights of Holders to Receive Payment..................................    18
SECTION 6.08     Collection Suit by Trustee............................................    19
SECTION 6.09     Trustee May File Proofs of Claim......................................    19
SECTION 6.10     Priorities............................................................    19
SECTION 6.11     Undertaking for Costs.................................................    19
                                          ARTICLE 7
                                           TRUSTEE
SECTION 7.01     Duties of Trustee.....................................................    20
SECTION 7.02     Rights of Trustee.....................................................    20
SECTION 7.03     Individual Rights of Trustee..........................................    21
SECTION 7.04     Trustee's Disclaimer..................................................    21
SECTION 7.05     Notice of Defaults....................................................    21
SECTION 7.06     Reports by Trustee to Holders.........................................    21
SECTION 7.07     Compensation and Indemnity............................................    21
SECTION 7.08     Replacement of Trustee................................................    22
SECTION 7.09     Successor Trustee by Merger, etc......................................    22
SECTION 7.10     Eligibility; Disqualification.........................................    23
SECTION 7.11     Preferential Collection of Claims Against Company.....................    23
                                          ARTICLE 8
                                    DISCHARGE OF INDENTURE
SECTION 8.01     Termination of Company's Obligations..................................    23
SECTION 8.02     Application of Trust Money............................................    24
SECTION 8.03     Repayment to Company..................................................    25
SECTION 8.04     Reinstatement.........................................................    25

 
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                                                                                          PAGE
                                                                                    
                                          ARTICLE 9
                                          AMENDMENTS
SECTION 9.01     Without Consent of Holders............................................    25
SECTION 9.02     With Consent of Holders...............................................    26
SECTION 9.03     Compliance with Trust Indenture Act...................................    27
SECTION 9.04     Revocation and Effect of Consents.....................................    27
SECTION 9.05     Notation on or Exchange of Securities.................................    27
SECTION 9.06     Trustee to Sign Amendments, etc. .....................................    27
                                          ARTICLE 10
                                   GUARANTEES OF SECURITIES
SECTION 10.01    Unconditional Guarantees..............................................    28
SECTION 10.02    Limitation of Guarantor's Liability...................................    29
SECTION 10.03    Contribution..........................................................    29
SECTION 10.04    Execution and Delivery of Guarantees..................................    30
SECTION 10.05    Addition of Guarantors................................................    30
SECTION 10.06    Release of Guarantee..................................................    30
SECTION 10.07    Consent to Jurisdiction and Service of Process........................    30
SECTION 10.08    Waiver of Immunity....................................................    31
SECTION 10.09    Judgment Currency.....................................................    31
                                          ARTICLE 11
                                        MISCELLANEOUS
SECTION 11.01    Trust Indenture Act Controls..........................................    32
SECTION 11.02    Notices...............................................................    32
SECTION 11.03    Communication by Holders with Other Holders...........................    32
SECTION 11.04    Certificate and Opinion as to Conditions Precedent....................    32
SECTION 11.05    Statements Required in Certificate or Opinion.........................    33
SECTION 11.06    Rules by Trustee and Agents...........................................    33
SECTION 11.07    Legal Holidays........................................................    33
SECTION 11.08    No Recourse Against Others............................................    33
SECTION 11.09    Governing Law.........................................................    33
SECTION 11.10    No Adverse Interpretation of Other Agreements.........................    33
SECTION 11.11    Successors............................................................    33
SECTION 11.12    Severability..........................................................    34
SECTION 11.13    Counterpart Originals.................................................    34
SECTION 11.14    Trustee as Paying Agent and Registrar.................................    34
SECTION 11.15    Table of Contents, Headings, etc. ....................................    34

 
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     INDENTURE dated as of                , 1994 among Union Texas Petroleum
Holdings, Inc., a Delaware corporation (the "Company"), the Guarantors named
herein and The First National Bank of Chicago, a national banking association,
as trustee (the "Trustee").
 
     Each party agrees as follows for the benefit of the other parties and for
the equal and ratable benefit of the Holders of the Company's      % Senior
Notes due      (the "Securities"):
 
                                   ARTICLE 1
 
                   DEFINITIONS AND INCORPORATION BY REFERENCE
 
     SECTION 1.01  Definitions
 
     "Adjusted Net Assets" of a Guarantor at any date means the lesser of (x)
the amount by which the fair value of the property of such Guarantor at such
date exceeds the total amount of liabilities, including, without limitation, the
probable amount of contingent liabilities (after giving effect to all other
fixed and contingent liabilities incurred or assumed on such date) of such
Guarantor at such date, but excluding liabilities under the Guarantee of such
Guarantor, and (y) the amount by which the present fair saleable value of the
assets of such Guarantor at such date exceeds the amount that will be required
to pay the probable liability of such Guarantor on its debts (after giving
effect to all other fixed and contingent liabilities incurred or assumed on such
date and after giving effect to any collection from any Subsidiary of such
Guarantor in respect of any obligations of such Subsidiary under the Guarantee
of such Guarantor), excluding debt in respect of the Guarantee of such
Guarantor, as they become absolute and matured.
 
     "Affiliate" of any specified Person means any Person directly or indirectly
controlling or controlled by, or under direct or indirect common control with,
such specified Person. For purposes of this definition, control of a Person
shall mean 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. The Trustee may request and may conclusively rely upon an
Officers' Certificate to determine whether any Person is an Affiliate of any
specified Person.
 
     "Agent" means any Registrar or Paying Agent.
 
     "Attributable Indebtedness", when used with respect to any Sale/Leaseback
Transaction, means, as at the time of determination, the present value
(discounted at a rate equivalent to the Company's then current weighted average
cost of funds for borrowed money as at the time of determination, compounded on
a semi-annual basis) of the total obligations of the lessee for rental payments
during the remaining term of the lease included in such Sale/Leaseback
Transaction (including any period for which such lease has been extended).
 
     "Bankruptcy Law" means Title 11, U.S. Code or any similar federal, state or
foreign law for the relief of debtors.
 
     "Board of Directors" means the Board of Directors of the Company or any
authorized committee of the Board of Directors of the Company.
 
     "Business Day" means any day other than a Legal Holiday.
 
     "Capital Stock" of any Person means and includes any and all shares, rights
to purchase, warrants or options (whether or not currently exercisable),
participation or other equivalents of or interests in (however designated) the
equity (which includes, but is not limited to, common stock, preferred stock and
partnership and joint venture interests) of such Person (excluding any debt
securities that are convertible into, or exchangeable for, such equity).
 
     "Capitalized Lease Obligation" of any Person means any obligation of such
Person to pay rent or other amounts under a lease of property, real or personal,
that is required to be capitalized for financial reporting purposes in
accordance with GAAP; and the amount of such obligation shall be the capitalized
amount thereof determined in accordance with GAAP.
   7
 
     "Common Equity" of any Person means and includes all Capital Stock of such
Person that is generally entitled to (i) vote in the election of directors of
such Person, or (ii) if such Person is not a corporation, vote or otherwise
participate in the selection of the governing body, partners, managers or others
that will control the management and policies of such Person.
 
     "Company" means the Person named as the "Company" in the first paragraph of
this instrument until a successor corporation shall have become such pursuant to
the applicable provisions of this Indenture, and thereafter "Company" shall mean
such successor corporation.
 
     "Consolidated Net Worth" of the Company means the consolidated
stockholders' equity of the Company and its Subsidiaries, as determined in
accordance with GAAP.
 
     "Corporate Trust Office of the Trustee" means the address of the Trustee
specified in Section 11.02 or such other address as the Trustee may give notice
to the Company.
 
     "Default" means any event, act or condition that is, or after notice or the
passage of time or both would be, an Event of Default.
 
     "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
any successor statute.
 
     "Funded Indebtedness" means all Indebtedness (including Indebtedness
incurred under any revolving credit, letter of credit or working capital
facility) that matures by its terms, or that is renewable at the option of any
obligor thereon to a date, more than one year after the date on which such
Indebtedness is originally incurred.
 
     "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 and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as may be approved by a significant segment of the accounting
profession of the United States, as in effect on the Issue Date.
 
     "Guarantor" means (i) each Subsidiary of the Company executing this
Indenture, (ii) each Subsidiary of the Company that becomes a guarantor of the
Securities pursuant to Section 10.05, (iii) each Subsidiary of the Company that
executes a supplemental indenture in which such Subsidiary agrees to be bound by
Article 10 and (iv) any Subsidiary of the Company that is a successor
corporation of any Subsidiary of the Company referred to in clauses (i) through
(iii). The term "Guarantor" shall not include any Subsidiary of the Company
referred to in clauses (i) through (iv) that shall have been released from its
obligations under Article 10 pursuant to Section 10.06.
 
     "Hedging Obligations" of any Person means the obligations of such Person
pursuant to any interest rate swap agreement, foreign currency exchange
agreement, interest rate collar agreement, option or futures contract or other
similar agreement or arrangement relating to interest rates or foreign exchange
rates.
 
     "Holder" means a Person in whose name a Security is registered.
 
     "Indebtedness" of any Person at any date means, without duplication, (i)
all indebtedness of such Person 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), (ii) all obligations of such Person evidenced by bonds, debentures,
notes or other similar instruments, (iii) all obligations of such Person in
respect of letters of credit or other similar instruments (or reimbursement
obligations with respect thereto), other than standby letters of credit incurred
by such Person in the ordinary course of business, (iv) all obligations of such
Person to pay the deferred and unpaid purchase price of property or services,
except trade payables and accrued expenses incurred in the ordinary course of
business, (v) all Capitalized Lease Obligations of such Person, (vi) all
Indebtedness (other than Joint Venture Indebtedness) of others secured by a Lien
on any asset of such Person, whether or not such Indebtedness is assumed by such
Person, (vii) all Indebtedness of others guaranteed by such Person to the extent
of such guarantee and (viii) all Hedging Obligations of such Person.
 
     "Indenture" means this Indenture as amended from time to time.
 
                                        2
   8
 
     "Independent Investment Banker" means an independent investment banking
institution of national standing appointed by the Company for purposes of
calculating any Make-Whole Premium, provided, that if the Company fails to make
such appointment at least 10 Business Days prior to the Redemption Date for any
Security to be redeemed, or if the institution so appointed is unwilling or
unable to make such calculation, such calculation will be made by Goldman, Sachs
& Co. or, if such firm is unwilling or unable to make such calculation, by an
independent investment banking institution of national standing appointed by the
Trustee.
 
     "Interest Payment Date" shall have the meaning assigned to such term in the
Securities.
 
     "Issue Date" means the date on which the Securities are originally issued
under this Indenture.
 
     "Joint Venture Indebtedness" means obligations secured by a Lien on the
interests of the Company or a Restricted Subsidiary, as the case may be, arising
under production sharing contracts or related supply contracts, if such Lien
covers ratably the interests of Pertamina, the Indonesian national oil company,
and all production sharing contractors thereunder.
 
     "Lien" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind in respect of such asset
(including, without limitation, any production payment, advance payment or
similar arrangement with respect to minerals in place), whether or not filed,
recorded or otherwise perfected under applicable law. For the purposes of this
Indenture, the Company or any Restricted Subsidiary shall be deemed to own
subject to a Lien any asset which it has acquired or holds subject to the
interest of a vendor or lessor under any conditional sale agreement, Capitalized
Lease Obligation (other than any Capitalized Lease Obligation relating to any
building, structure, equipment or other property used or to be used in the
ordinary course of business of the Company and the Restricted Subsidiaries) or
other title retention agreement relating to such asset.
 
     "Make-Whole Premium" means, with respect to any Security (or portion
thereof) to be redeemed, an amount equal to the excess, if any, of:
 
          (i) 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 Security (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 Security (or portion thereof)
        being redeemed;
 
     over
 
          (ii) the principal amount of the Security (or portion thereof) being
     redeemed.
 
The present values of interest and principal payments referred to in clause (i)
above will be determined in accordance with generally accepted principles of
financial analysis. Such 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 Treasury Yield. The Make-Whole Premium shall be
calculated by an Independent Investment Banker.
 
     For purposes of determining the Make-Whole Premium, "Treasury Yield" means
a rate of interest per annum equal to the weekly average yield to maturity of
United States Treasury Notes that have a constant maturity that corresponds to
the remaining term to maturity of the Securities, calculated to the nearest
1/12 of a year (the "Remaining Term"). The 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 Notes 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 (the "H.15 Statistical Release"). If the H.15 Statistical
Release sets forth a weekly average yield for United States Treasury Notes
having a constant maturity that is the same as the Remaining Term, then the
Treasury Yield will be equal to such weekly average yield. In all other cases,
the Treasury Yield will be calculated by interpolation, on a straight-line
basis, between the weekly average yields on the United States Treasury Notes
 
                                        3
   9
 
that have a constant maturity closest to and greater than the Remaining Term and
the United States Treasury Notes 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). Any weekly average yields so calculated by interpolation will be
rounded to the nearest 1/100 of 1%, with any figure of 1/200% or above being
rounded upward. If weekly average yields for United States Treasury Notes are
not available in the H.15 Statistical Release or otherwise, then the Treasury
Yield will be calculated by interpolation of comparable rates selected by the
Independent Investment Banker.
 
     "Net Proceeds" means, with respect to any Sale/Leaseback Transaction
entered into by the Company or any Restricted Subsidiary, the aggregate net
proceeds received by the Company or such Restricted Subsidiary from such
Sale/Leaseback Transaction after payment of expenses, taxes, commissions and
similar amounts incurred in connection therewith, whether such proceeds are in
cash or in property (valued at the fair market value thereof at the time of
receipt, as determined by the Board of Directors).
 
     "Non-Recourse Indebtedness" means, at any date, the aggregate amount at
such date of Indebtedness of the Company or a Restricted Subsidiary in respect
of which the recourse of the holder of such Indebtedness, whether direct or
indirect and whether contingent or otherwise, is effectively limited to
specified assets.
 
     "Officer" means the President, the Treasurer, any Assistant Treasurer,
Controller, Secretary, Assistant Secretary or any Vice President of a Person.
 
     "Officers' Certificate" means a certificate signed by two Officers of a
Person, one of whom must be the Person's chief executive officer, chief
financial officer or chief accounting officer.
 
     "Opinion of Counsel" means an opinion from legal counsel who is acceptable
to the Trustee. The counsel may be an employee of or counsel to the Company, a
Guarantor or the Trustee.
 
     "Ordinary Course Lien" means:
 
          (a) Liens for taxes, assessments or governmental charges or levies on
     the property of the Company or any Restricted Subsidiary if the same shall
     not at the time be delinquent or thereafter can be paid without penalty, or
     are being contested in good faith by appropriate proceedings and for which
     adequate reserves in accordance with GAAP shall have been set aside on the
     books of the Company;
 
          (b) Liens imposed by law, such as carriers', warehousemen's,
     landlords' and mechanics' liens and other similar liens arising in the
     ordinary course of business which secure obligations not more than 60 days
     past due or which are being contested in good faith by appropriate
     proceedings and for which adequate reserves in accordance with GAAP shall
     have been set aside on the books of the Company;
 
          (c) Liens arising out of pledges or deposits under worker's
     compensation laws, unemployment insurance, old age pensions, or other
     social security or retirement benefits, or similar legislation;
 
          (d) Utility easements, building restrictions and such other
     encumbrances or charges against real property as are of a nature generally
     existing with respect to properties of a similar character and which do not
     in any material way affect the marketability of the same or interfere with
     the use thereof in the ordinary course of business of the Company and the
     Restricted Subsidiaries;
 
          (e) Liens arising under operating agreements or similar agreements in
     respect of obligations which are not yet due or which are being contested
     in good faith by appropriate proceedings;
 
          (f) Liens reserved in oil, gas and/or mineral leases, production
     sharing contracts and petroleum concession agreements and licenses for
     bonus or rental payments and for compliance with the terms of such leases,
     contracts, agreements and licenses;
 
          (g) Liens pursuant to partnership agreements, oil, gas and/or mineral
     leases, production sharing contracts, petroleum concession agreements and
     licenses, farm-out agreements, division orders, contracts for the sale,
     purchase, exchange, processing or transportation of oil, gas and/or other
     hydrocarbons, unitization and pooling declarations and agreements,
     operating agreements, development agreements, area of mutual interest
     agreements, and other agreements which are customary in the oil, gas and
     other mineral exploration, development and production business and in the
     business of processing of gas and gas condensate production for the
     extraction of products therefrom;
 
                                        4
   10
 
          (h) Liens on personal property (excluding the Capital Stock of any
     Restricted Subsidiary) securing Indebtedness of the Company or any
     Restricted Subsidiary other than Funded Indebtedness; and
 
          (i) Liens which secure a judgment or other court-ordered award or
     settlement as to which the Company has not exhausted its appellate rights.
 
     "Pari Passu Indebtedness" means any Indebtedness of the Company, whether
outstanding on the Issue Date or thereafter created, incurred or assumed,
unless, in the case of any particular Indebtedness, the instrument creating or
evidencing the same or pursuant to which the same is outstanding expressly
provides that such Indebtedness shall be subordinated in right of payment to the
Securities.
 
     "Person" means any individual, corporation, partnership, joint venture,
incorporated or unincorporated association, joint-stock company, trust,
unincorporated organization or government or other agency or political
subdivision thereof or other entity of any kind.
 
     "Redemption Date," when used with respect to any Security to be redeemed,
means the date fixed for such redemption by or pursuant to this Indenture.
 
     "Redemption Price" shall have the meaning assigned to such term in the
Securities.
 
     "Restricted Subsidiary" means (i) each Subsidiary of the Company executing
this Indenture, (ii) Union Texas Petroleum Limited so long as it is a Subsidiary
of the Company and (iii) any Subsidiary of the Company that is a successor
corporation of any Subsidiary of the Company referred to in clauses (i) and
(ii). The status of any Subsidiary of the Company as a Restricted Subsidiary
shall continue, irrespective of any release of any Guarantee provided by such
Subsidiary under Article 10, so long as it is a Subsidiary of the Company.
 
     "Sale/Leaseback Transaction" means any arrangement with any Person
providing for the leasing by the Company or any Restricted Subsidiary, for a
period of more than three years, of any real or tangible personal property,
which property has been or is to be sold or transferred by the Company or such
Restricted Subsidiary to such Person in contemplation of such leasing.
 
     "SEC" means the Securities and Exchange Commission.
 
     "Securities" means the Securities described above issued under this
Indenture. For purposes of this Indenture, the term "Securities" shall, except
where the context otherwise requires, include the Guarantees.
 
     "Securities Act" means the Securities Act of 1933, as amended, and any
successor statute.
 
     "Subsidiary" of any Person means any corporation of which at least a
majority of the aggregate voting power of all classes of the Common Equity is
owned by such Person directly or through one or more other Subsidiaries of such
Person, and any entity other than a corporation in which such Person, directly
or indirectly, owns at least a majority of the Common Equity of such entity.
 
     "TIA" means the Trust Indenture Act of 1939, as amended (15 U.S.C. sec.sec.
77aaa-77bbbb), as in effect on the Issue Date.
 
     "Trust Officer" means any officer or assistant officer of the Trustee
assigned by the Trustee to administer its corporate trust matters.
 
     "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.
 
     "Union Texas East Kalimantan Limited" means Union Texas East Kalimantan
Limited, a Bahamian corporation and a Subsidiary of the Company.
 
     "Union Texas Petroleum Limited" means Union Texas Petroleum Limited, an
English limited company and a Subsidiary of the Company.
 
     "U.S. Government Obligations" means direct obligations of the United States
of America for the payment of which the full faith and credit of the United
States of America is pledged.
 
                                        5
   11
 
     SECTION 1.02  Other Definitions
 


                                                                                 DEFINED
                                                                                   IN
               TERM                                                              SECTION
               ----                                                              -------
                                                                              
        "Authorized Agent".....................................................  10.07
        "Company Guarantee"....................................................  10.01(a)
        "Custodian"............................................................   6.01
        "Event of Default".....................................................   6.01
        "Funding Guarantor"....................................................  10.03
        "Guarantees"...........................................................  10.01(a)
        "Judgment Currency"....................................................  10.09
        "Legal Holiday"........................................................  11.07
        "Non-U.S. Guarantor"...................................................  10.07
        "Paying Agent".........................................................   2.03
        "Registrar"............................................................   2.03
        "Successor"............................................................   5.01

 
     SECTION 1.03  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.
 
     All 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 1.04  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; and
 
          (5) provisions apply to successive events and transactions.
 
                                   ARTICLE 2
 
                                 THE SECURITIES
 
     SECTION 2.01  Form and Dating
 
     The Securities, the notations thereon relating to the Guarantees and the
Company Guarantee and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A to this Indenture. The Securities may
have notations, legends or endorsements required by law, securities exchange
rule or usage. Each Security shall be dated the date of its authentication. The
Securities shall be in denominations of $1,000 and whole multiples thereof.
 
     The terms and provisions contained in the Securities shall constitute, and
are hereby expressly made, a part of this Indenture and to the extent
applicable, the Company, the Guarantors and the Trustee, by their execution and
delivery of this Indenture, expressly agree to such terms and provisions and to
be bound thereby.
 
                                        6
   12
 
     SECTION 2.02  Execution and Authentication
 
     Two Officers of the Company shall sign the Securities and the notation
thereon relating to the Company Guarantee on behalf of the Company, and two
Officers of each Guarantor shall sign the notation on the Securities relating to
the Guarantees on behalf of such Guarantor, in each case by manual or facsimile
signature. The Company's seal shall be reproduced on the Securities and may be
in facsimile form.
 
     If an Officer of the Company or any Guarantor whose signature is on a
Security no longer holds that office at the time the Security is authenticated,
the Security shall nevertheless be valid.
 
     A Security shall not be entitled to any benefit under this Indenture or be
valid or obligatory for any purpose until authenticated by the manual signature
of the Trustee, which signature shall be conclusive evidence that the Security
has been authenticated under this Indenture.
 
     The Trustee shall authenticate Securities for original issue up to the
aggregate principal amount of $200,000,000, upon a written order of the Company
signed by two Officers of the Company. The aggregate principal amount of
Securities outstanding at any time may not exceed such amount except as provided
in Section 2.07.
 
     The Trustee may appoint an authenticating agent acceptable to the Company
to authenticate Securities. An authenticating agent may authenticate Securities
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 the Company,
the Guarantors or an Affiliate of any of them.
 
     SECTION 2.03  Registrar and Paying Agent
 
     The Company shall maintain an office or agency where Securities may be
presented for registration of transfer or exchange ("Registrar") and an office
or agency where Securities may be presented for payment ("Paying Agent"). The
Registrar shall keep a register of the Securities and of their transfer and
exchange. The Company 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 Company shall enter into an appropriate agency agreement with any
Registrar or Paying Agent not a party to this Indenture. The agreement shall
implement the provisions of this Indenture that relate to such Agent. The
Company shall notify the Trustee of the name and address of any Agent not a
party to this Indenture. The Company may change any Paying Agent or Registrar
without notice to any Holder. If the Company fails to appoint or maintain
another entity as Registrar or Paying Agent, the Trustee shall act as such. The
Company or any of its Subsidiaries may act as Paying Agent or Registrar.
 
     SECTION 2.04  Paying Agent to Hold Money in Trust
 
     The Company 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, or premium, if any, or interest on the Securities, whether such money shall
have been paid to it by the Company or any Guarantor, and will notify the
Trustee of any default by the Company or any Guarantor 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 and to account for any funds
disbursed. The Company at any time may require a Paying Agent to pay all money
held by it to the Trustee and to account for any funds disbursed. Upon payment
over to the Trustee and upon accounting for any funds disbursed, the Paying
Agent (if other than the Company or a Subsidiary) shall have no further
liability for the money. If the Company or a Subsidiary 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.
 
     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
Holders and shall otherwise comply with TIA sec. 312(a). If the Trustee is
 
                                        7
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not the Registrar, the Company shall furnish to 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 Holders, and the
Company shall otherwise comply with TIA sec. 312(a).
 
     SECTION 2.06  Transfer and Exchange
 
     The Securities shall be issued in registered form and shall be transferable
only upon their surrender for registration of transfer. Where Securities are
presented to the Registrar with a request to register a transfer or to exchange
the Securities for an equal principal amount of Securities of other
denominations, the Registrar shall register the transfer or make the exchange if
its requirements for such transaction are met; provided, however, that any
Security presented or surrendered for registration of transfer or exchange shall
be duly endorsed or accompanied by a written instruction of transfer in a form
satisfactory to the Registrar and the Trustee, duly executed by the Holder
thereof or the Holder's attorney duly authorized in writing. To permit
registrations of transfer and exchanges, the Company shall issue and the Trustee
shall authenticate Securities at the Registrar's request.
 
     The Company shall not be required (i) to issue, to register the transfer
of, or to exchange Securities during a period beginning at the opening of
business on a Business Day 15 days before the day of any selection of Securities
for redemption under Section 3.02 and ending at the close of business on the
date of selection, (ii) to register the transfer of or to exchange any Security
so selected for redemption in whole or in part, except the unredeemed portion of
any Security being redeemed in part, or (iii) to register the transfer or
exchange of a Security between the record date and the next succeeding Interest
Payment Date.
 
     No service charge shall be made to a Holder for any registration of
transfer or exchange (except as otherwise expressly permitted herein), but the
Company may require payment of a sum sufficient to cover any transfer tax or
similar governmental charge payable in connection therewith (other than such
transfer tax or similar governmental charge payable upon exchanges pursuant to
Section 3.06 or 9.05).
 
     SECTION 2.07  Replacement Securities
 
     If any mutilated Security is surrendered to the Trustee, or the Company and
the Trustee receive evidence to their satisfaction of the destruction, loss or
theft of any Security, the Company shall issue and the Trustee shall
authenticate a replacement Security if the Trustee's requirements are met. If
required by the Trustee, the Company or any Guarantor, an indemnity bond must be
supplied by the Holder that is sufficient in the judgment of the Trustee, the
Company and the Guarantors to protect the Company, the Guarantors, the Trustee,
any Agent or any authenticating agent from any loss which any of them may suffer
if a Security is replaced. The Company and the Guarantors may charge for their
expenses in replacing a Security.
 
     Every replacement Security is an additional obligation of the Company and
the Guarantors.
 
     SECTION 2.08  Outstanding Securities
 
     The Securities outstanding at any time are all the Securities authenticated
by the Trustee except for those cancelled by it, those delivered to it for
cancellation and those described in this Section as not outstanding.
 
     If a Security is replaced pursuant to Section 2.07, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Security is held by a bona fide purchaser.
 
     If the principal amount of any Security is considered paid under Section
4.01, it ceases to be outstanding and interest on it ceases to accrue.
 
     Except as set forth in Section 2.09, a Security does not cease to be
outstanding because the Company, a Guarantor or an Affiliate of any of them
holds the Security.
 
                                        8
   14
 
     SECTION 2.09  Treasury Securities
 
     In determining whether the Holders of the required principal amount of
Securities have concurred in any direction, waiver or consent, Securities owned
by the Company, a Guarantor or an Affiliate of any of them shall be considered
as though not outstanding, except that for the purpose of determining whether
the Trustee shall be protected in relying on any such direction, waiver or
consent, only Securities which the Trustee knows are so owned shall be so
disregarded.
 
     SECTION 2.10  Temporary Securities
 
     Until definitive Securities are ready for delivery, the Company may prepare
and the Trustee shall authenticate temporary Securities. Temporary Securities
shall be substantially in the form of definitive Securities, but may have
variations that the Company considers appropriate for temporary Securities.
Without unreasonable delay, the Company shall prepare and the Trustee shall
authenticate definitive Securities in exchange for temporary Securities. Until
so exchanged, the temporary Securities shall in all respects be entitled to the
same benefits under this Indenture as definitive Securities.
 
     SECTION 2.11  Cancellation
 
     The Company or any Guarantor at any time may deliver Securities to the
Trustee for cancellation. The Registrar and the Paying Agent shall forward to
the Trustee any Securities surrendered to them for registration of transfer,
exchange or payment. The Trustee shall cancel all Securities surrendered for
registration of transfer, exchange, payment, replacement or cancellation. Unless
the Company shall direct that cancelled Securities be returned to it, after
written notice to the Company all cancelled Securities held by the Trustee shall
be destroyed in accordance with the usual destruction procedures of the Trustee,
and the Trustee shall maintain a record of their destruction. The Company may
not issue new Securities to replace Securities that have been paid or that have
been delivered to the Trustee for cancellation.
 
     SECTION 2.12  Defaulted Interest
 
     If the Company defaults in a payment of interest on the Securities, it
shall pay the defaulted interest in any lawful manner plus, to the extent
lawful, interest on the defaulted interest, to the Persons who are Holders on a
subsequent special record date, in each case at the rate provided in the
Securities and in Section 4.01. The Company shall, with the consent of the
Trustee, fix each such special record date and payment date. At least 15 days
before any special record date, the Company (or the Trustee, in the name of and
at the expense of the Company) shall mail to Holders a notice that states the
special record date, the related payment date and the amount of such interest to
be paid.
 
     SECTION 2.13  Persons Deemed Owners
 
     The Company, the Trustee, any Agent and any authenticating agent may treat
the Person in whose name any Security is registered as the owner of such
Security for the purpose of receiving payments of principal of, or premium, if
any, or interest on such Security and for all other purposes. None of the
Company, the Trustee, any Agent or any authenticating agent shall be affected by
any notice to the contrary.
 
                                   ARTICLE 3
 
                                   REDEMPTION
 
     SECTION 3.01  Notices to Trustee
 
     If the Company elects to redeem Securities pursuant to the redemption
provisions of Section 3.07, 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 the Section of this Indenture pursuant to which the redemption
shall occur, the Redemption Date, the principal amount of Securities to be
redeemed and the Redemption Price.
 
                                        9
   15
 
     SECTION 3.02  Selection of Securities to be Redeemed
 
     If less than all of the Securities are to be redeemed, the Trustee shall
select the Securities to be redeemed pro rata or by lot. The particular
Securities to be redeemed shall be selected, unless otherwise provided herein,
not less than 30 days nor more than 60 days prior to the Redemption Date by the
Trustee from the outstanding Securities not previously called for redemption.
 
     The Trustee shall promptly notify the Company in writing of the Securities
selected for redemption and, in the case of any Security selected for partial
redemption, the principal amount thereof to be redeemed. Securities and portions
of them selected shall be in amounts of $1,000 or whole multiples of $1,000;
except that if all of the Securities of a Holder are to be redeemed, the entire
outstanding amount of Securities held by such Holder, even if not a whole
multiple of $1,000, shall be redeemed. Except as provided in the preceding
sentence, provisions of this Indenture that apply to Securities called for
redemption also apply to portions of Securities called for redemption.
 
     SECTION 3.03  Notices to Holders
 
     (a) At least 30 days but not more than 60 days before a Redemption Date,
the Company shall mail in conformity with Section 11.02 a notice of redemption
to each Holder whose Securities are to be redeemed.
 
     The notice shall identify the Securities to be redeemed and shall state:
 
          (1) the Redemption Date;
 
          (2) the Redemption Price;
 
          (3) if any Security is being redeemed in part, the portion of the
     principal amount of such Security to be redeemed and that, after the
     Redemption Date, upon surrender of such Security, a new Security or
     Securities in principal amount equal to the unredeemed portion will be
     issued;
 
          (4) the name and address of the Paying Agent;
 
          (5) that Securities called for redemption must be surrendered to the
     Paying Agent at the address specified in such notice to collect the
     Redemption Price;
 
          (6) that unless the Company defaults in making the redemption payment,
     interest on Securities called for redemption ceases to accrue on and after
     the Redemption Date and the only remaining right of the Holders is to
     receive payment of the Redemption Price upon surrender to the Paying Agent
     of the Securities;
 
          (7) the paragraph of the Securities pursuant to which the Securities
     are being redeemed;
 
          (8) the aggregate principal amount of Securities being redeemed; and
 
          (9) the CUSIP number of the Securities.
 
     (b) At the Company's request, the Trustee shall give the notice required in
Section 3.03(a) in the Company's name and at its expense; provided, however,
that the Company shall deliver to the Trustee, at least 40 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 Section 3.03(a).
 
     SECTION 3.04  Effect of Notice of Redemption
 
     Once notice of redemption is mailed pursuant to Section 3.03, Securities
called for redemption become due and payable on the Redemption Date at the
Redemption Price. Upon surrender to the Paying Agent, such Securities shall be
paid out at the Redemption Price.
 
                                       10
   16
 
     SECTION 3.05  Deposit of Redemption Price
 
     One Business Day prior to the Redemption Date, the Company shall deposit
with the Trustee or with the Paying Agent money sufficient to pay the Redemption
Price of all Securities to be redeemed on that date. The Trustee or the Paying
Agent shall return to the Company any money not required for that purpose.
 
     If the Company complies with the preceding paragraph, interest on the
Securities or portions thereof to be redeemed (whether or not such Securities
are presented for payment) will cease to accrue on the applicable Redemption
Date. If any Security called for redemption shall not be so paid upon surrender
because of the failure of the Company to comply with the preceding paragraph,
then interest will be paid on the unpaid principal and premium, if any, from the
Redemption Date until such principal and premium are paid and, to the extent
lawful, on any interest not paid on such unpaid principal, in each case at the
rate provided in the Securities and in Section 4.01.
 
     SECTION 3.06  Securities Redeemed in Part
 
     Upon surrender of a Security that is redeemed in part, the Company shall
issue and the Trustee shall authenticate for the Holder, at the expense of the
Company, a new Security equal in principal amount to the unredeemed portion of
the Security surrendered.
 
     SECTION 3.07  Optional Redemption
 
     The Securities may be redeemed at any time, at the option of the Company,
in whole or from time to time in part, at the Redemption Price specified in the
Securities.
 
     Any redemption pursuant to this Section 3.07 shall be made, to the extent
applicable, pursuant to the provisions of Sections 3.01 through 3.06.
 
                                   ARTICLE 4
 
                                   COVENANTS
 
     SECTION 4.01  Payment of Securities
 
     The Company shall pay the principal of, and premium, if any, and interest
on the Securities on the dates and in the manner provided in the Securities.
Principal, premium and interest shall be considered paid on the date due if the
Paying Agent, other than the Company or a Subsidiary of the Company, holds on
that date money deposited by the Company designated for and sufficient to pay
all principal, premium and interest then due.
 
     The Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue principal, and premium, if any,
at a rate equal to the then applicable interest rate on the Securities to the
extent lawful; and it shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue installments of interest
(without regard to any applicable grace period) at the same rate to the extent
lawful.
 
     SECTION 4.02  Maintenance of Office or Agency
 
     The Company will maintain, in the Borough of Manhattan, The City of New
York, an office or agency (which may be an office of the Trustee, the Registrar
or the Paying Agent) where Securities may be presented for registration of
transfer or exchange, where Securities may be presented for payment and where
notices and demands to or upon the Company in respect of the Securities and this
Indenture may be served. Unless otherwise designated by the Company by written
notice to the Trustee, such office or agency shall be the principal office of
The First National Bank of Chicago, in The City of New York which, on the date
hereof, is located at                                                 . The
Company will 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 Company
shall fail to maintain any such required office or agency or shall fail to
furnish the Trustee with
 
                                       11
   17
 
the address thereof, such presentations, surrenders, notices and demands may be
made or served at the Corporate Trust Office of the Trustee.
 
     The Company may also from time to time designate one or more other offices
or agencies where the Securities 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
Company of its obligation to maintain an office or agency in the Borough of
Manhattan, The City of New York for such purposes. The Company will give prompt
written notice to the Trustee of any such designation or rescission and of any
change in the location of any such other office or agency. The Company hereby
designates the Corporate Trust Services Division of the Trustee as one such
office or agency of the Company in accordance with Section 2.03.
 
     SECTION 4.03  SEC Reports; Financial Statements
 
     (a) The Company shall file with the Trustee, within 15 days after it files
the same with the SEC, copies of the annual reports and the information,
documents and other reports (or copies of such portions of any of the foregoing
as the SEC may by rules and regulations prescribe) that the Company is required
to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act. If the
Company is not subject to the requirements of such Section 13 or 15(d), the
Company shall file with the Trustee, within 15 days after it would have been
required to file the same with the SEC, financial statements, including any
notes thereto (and with respect to annual reports, an auditors' report by a firm
of established national reputation), and a "Management's Discussion and Analysis
of Financial Condition and Results of Operations," both comparable to that which
the Company would have been required to include in such annual reports,
information, documents or other reports if the Company had been subject to the
requirements of such Section 13 or 15(d). The Company and each Guarantor shall
also comply with the provisions of TIA sec. 314(a).
 
     (b) If the Company is required to furnish annual or quarterly reports to
its stockholders pursuant to the Exchange Act, the Company shall cause any
annual report furnished to its stockholders generally and any quarterly or other
financial reports furnished by it to its stockholders generally to be filed with
the Trustee and mailed to the Holders at their addresses appearing in the
register of Securities maintained by the Registrar. If the Company is not
required to furnish annual or quarterly reports to its stockholders pursuant to
the Exchange Act, the Company shall cause its financial statements referred to
in Section 4.03(a), including any notes thereto (and with respect to annual
reports, an auditors' report by a firm of established national reputation), and
a "Management's Discussion and Analysis of Financial Condition and Results of
Operations" to be so mailed to the Holders within 90 days after the end of each
of the Company's fiscal years and within 60 days after the end of each of the
Company's first three fiscal quarters.
 
     (c) The Company shall provide the Trustee with a sufficient number of
copies of all reports and other documents and information that the Trustee may
be required to deliver to Holders under this Section.
 
     SECTION 4.04  Compliance Certificate
 
     (a) The Company shall deliver to the Trustee, within 120 days after the end
of each fiscal year of the Company, an Officers' Certificate stating that a
review of the activities of the Company and its Subsidiaries during the
preceding fiscal year has been made under the supervision of the signing
Officers of the Company with a view to determining whether the Company has kept,
observed, performed and fulfilled its obligations under this Indenture, and
further stating, as to each such Officer signing such certificate, that to the
best of his knowledge the Company and each Guarantor has kept, observed,
performed and fulfilled each and every covenant contained in this Indenture and
is not in default in the performance or observance of any of the terms,
provisions and conditions hereof (or, if a Default or Event of Default shall
have occurred, describing all such Defaults or Events of Default of which such
Officer may have knowledge and what action the Company or such Guarantor, as the
case may be, is taking or proposes to take with respect thereto) and that to the
best of his knowledge no event has occurred and remains in existence by reason
of which payments on account of the principal of, or premium, if any, or
interest, if any, on the Securities or payments on account of the
 
                                       12
   18
 
Guarantees are prohibited or, if such event has occurred, a description of the
event and what action the Company and the Guarantors are taking or propose to
take with respect thereto.
 
     (b) So long as not contrary to the then current recommendations of the
American Institute of Certified Public Accountants, the year-end financial
statements delivered pursuant to Section 4.03 shall be accompanied by a written
statement of the Company's independent public accountants (who shall be a firm
of established national reputation) that in making the examination necessary for
certification of such financial statements nothing has come to their attention
that would lead them to believe that the Company has violated any provisions of
Article 4 or 5 of this Indenture (to the extent such provisions relate to
accounting matters) or, if any such violation has occurred, specifying the
nature and period of existence thereof, it being understood that such
accountants shall not be liable directly or indirectly to any Person for any
failure to obtain knowledge of any such violation.
 
     (c) The Company and the Guarantors shall, so long as any of the Securities
are outstanding, deliver to the Trustee, forthwith upon any Officer of the
Company or any Guarantor becoming aware of any Default or Event of Default under
this Indenture, an Officers' Certificate specifying such Default or Event of
Default and what action the Company or such Guarantor is taking or proposes to
take with respect thereto.
 
     SECTION 4.05  Corporate Existence
 
     The Company shall do or cause to be done all things necessary to preserve
and keep in full force and effect its corporate existence and the corporate,
partnership and other existence of each of its Subsidiaries and all rights
(charter and statutory) and franchises of the Company and its Subsidiaries,
provided that the Company shall not be required to preserve the corporate
existence of any Subsidiary of the Company or any such right or franchise if the
Board of Directors shall determine that the preservation thereof is no longer
desirable in the conduct of the business of the Company and the Restricted
Subsidiaries and that the loss thereof would not have a material adverse effect
on the business, prospects, assets or financial condition of the Company and its
Subsidiaries taken as a whole and would not have any material adverse effect on
the payment and performance of the obligations of the Company and the Guarantors
under the Securities and this Indenture.
 
     SECTION 4.06  Maintenance of Properties
 
     The Company shall cause all properties owned by the Company or any of its
Subsidiaries or used or held for use in the conduct of its business or the
business of any such Subsidiary to be maintained and kept in good condition,
repair and working order (reasonable wear and tear excepted) and supplied with
all necessary equipment and will cause to be made all necessary repairs,
renewals, replacements, betterments and improvements thereof, all as in the
judgment of the Company may be necessary so that the business carried on in
connection therewith may be properly and advantageously conducted at all times;
provided that nothing in this Section shall prevent the Company from
discontinuing the operation or maintenance of any of such properties if such
discontinuance is, in the judgment of the Company, desirable in the conduct of
its business or the business of any such Subsidiary and not disadvantageous in
any material respect to the Holders.
 
     SECTION 4.07  Payment of Taxes and Other Claims
 
     The Company will pay or discharge or cause to be paid or discharged, before
the same shall become delinquent, (i) all taxes, assessments and governmental
charges levied or imposed upon the Company or any of its Subsidiaries or upon
the income, profits or property of the Company or any of its Subsidiaries, and
(ii) all lawful claims for labor, materials and supplies which, if unpaid, might
by law become a Lien upon the property of the Company or any of its
Subsidiaries; provided that the Company shall not be required to pay or
discharge or cause to be paid or discharged any such tax, assessment, charge or
claim whose amount, applicability or validity is being contested in good faith
by appropriate proceedings.
 
                                       13
   19
 
     SECTION 4.08  Limitation on Sale/Leaseback Transactions
 
     The Company shall not, and shall not permit any Restricted Subsidiary to,
enter into any Sale/Leaseback Transaction with any Person (other than the
Company or a Restricted Subsidiary) unless:
 
          (a) the Company or such Restricted Subsidiary would be entitled to
     incur Indebtedness, in a principal amount equal to the Attributable
     Indebtedness with respect to such Sale/Leaseback Transaction, secured by a
     Lien on the property subject to such Sale/Leaseback Transaction pursuant to
     Section 4.09 without equally and ratably securing the Securities pursuant
     to such Section;
 
          (b) after the Issue Date and within a period commencing six months
     prior to the consummation of such Sale/Leaseback Transaction and ending six
     months after the consummation thereof, the Company or such Restricted
     Subsidiary shall have expended for property used or to be used in the
     ordinary course of business of the Company and the Restricted Subsidiaries
     (including amounts expended for the exploration, drilling or development
     thereof, and for additions, alterations, repairs and improvements thereto)
     an amount equal to all or a portion of the Net Proceeds of such
     Sale/Leaseback Transaction and the Company shall have elected to designate
     such amount as a credit against such Sale/Leaseback Transaction (with any
     such amount not being so designated to be applied as set forth in clause
     (c) below); or
 
          (c) the Company, during the 12-month period after the effective date
     of such Sale/Leaseback Transaction, shall have applied to the voluntary
     defeasance or retirement of Securities or any Pari Passu Indebtedness an
     amount equal to the greater of the Net Proceeds of the sale or transfer of
     the property leased in such Sale/Leaseback Transaction and the fair value,
     as determined by the Board of Directors of the Company, of such property at
     the time of entering into such Sale/Leaseback Transaction (in either case
     adjusted to reflect the remaining term of the lease and any amount expended
     by the Company as set forth in clause (b) above), less an amount equal to
     the principal amount of Securities and Pari Passu Indebtedness voluntarily
     defeased or retired by the Company within such 12-month period and not
     designated as a credit against any other Sale/Leaseback Transaction entered
     into by the Company or any Restricted Subsidiary during such period.
 
     SECTION 4.09  Limitation on Liens
 
     No provision of this Indenture or the Securities shall in any way restrict
or prevent the Company or any Restricted Subsidiary from issuing, assuming,
guaranteeing or otherwise incurring any Indebtedness, provided, however, that
the Company shall not, and shall not permit any Restricted Subsidiary to, issue,
assume or guarantee any Indebtedness for borrowed money secured by any Lien on
any property or asset now owned or hereafter acquired by the Company or such
Restricted Subsidiary without making effective provision whereby any and all
Securities then or thereafter outstanding will be secured by a Lien equally and
ratably with any and all other obligations thereby secured for so long as any
such obligations shall be so secured. Notwithstanding the foregoing, the Company
or any Restricted Subsidiary may, without so securing the Securities, issue,
assume or guarantee Indebtedness secured by the following Liens:
 
          (a) Liens existing on the Issue Date or provided for under the terms
     of agreements existing on the Issue Date (including, without limitation,
     the Lien provided for pursuant to Section 7.07);
 
          (b) Liens on property securing (i) all or any portion of the cost of
     exploration, drilling or development of such property, (ii) all or any
     portion of the cost of acquiring, constructing, altering, improving or
     repairing any property or assets, real or personal, or improvements used or
     to be used in connection with such property or (iii) Indebtedness incurred
     by the Company or any Restricted Subsidiary to provide funds for the
     activities set forth in clauses (i) and (ii) above;
 
          (c) Liens securing Indebtedness owed by a Restricted Subsidiary to the
     Company or to any other Restricted Subsidiary;
 
          (d) Liens on the property of any Person existing at the time such
     Person becomes a Subsidiary of the Company and not incurred as a result of
     (or in connection with or in anticipation of) such Person
 
                                       14
   20
 
     becoming a Subsidiary of the Company, provided that such Liens do not
     extend to or cover any property or assets of the Company or any of its
     Subsidiaries other than the property so acquired;
 
          (e) Liens on any property securing (i) Indebtedness incurred in
     connection with the construction, installation or financing of pollution
     control or abatement facilities or other forms of industrial revenue bond
     financing or (ii) Indebtedness issued or guaranteed by the United States or
     any State thereof or any department, agency or instrumentality of either;
 
          (f) any Lien on any asset securing Non-Recourse Indebtedness of the
     Company or any Restricted Subsidiary or on any asset of Union Texas East
     Kalimantan Limited securing Joint Venture Indebtedness;
 
          (g) any Lien extending, renewing or replacing (or successive
     extensions, renewals or replacements of) any Lien of any type permitted
     under clauses (a) through (f) above, provided that such Lien extends to or
     covers only the property that is subject to the Lien being extended,
     renewed or replaced;
 
          (h) any Ordinary Course Lien arising, but only so long as continuing,
     in the ordinary course of business of the Company and the Restricted
     Subsidiaries; or
 
          (i) Liens (exclusive of any Lien of any type otherwise permitted under
     clauses (a) through (h) above) securing Indebtedness of the Company or any
     Restricted Subsidiary in an aggregate principal amount which, together with
     the aggregate amount of Attributable Indebtedness deemed to be outstanding
     in respect of all Sale/Leaseback Transactions entered into pursuant to
     clause (a) of Section 4.08 (exclusive of any such Sale/Leaseback
     Transactions otherwise permitted under clauses (a) through (h) above), does
     not at the time such Indebtedness is incurred exceed 10% of the
     Consolidated Net Worth of the Company (as shown in the most recent audited
     consolidated balance sheet of the Company and its Subsidiaries).
 
     Notwithstanding the foregoing, nothing in this Section 4.09 shall be deemed
to prohibit or otherwise limit the following types of transactions:
 
          (i) the sale, granting of Liens with respect to, or other transfer of,
     crude oil, natural gas or other petroleum hydrocarbons in place for a
     period of time until, or in an amount such that, the transferee will
     realize therefrom a specified amount (however determined) of money or of
     such crude oil, natural gas or other petroleum hydrocarbons;
 
          (ii) the sale or other transfer of any other interest in property of
     the character commonly referred to as a production payment, overriding
     royalty, forward sale or similar interest; or
 
          (iii) the granting of Liens required by any contract or statute in
     order to permit the Company or any Restricted Subsidiary to perform any
     contract or subcontract made by it with or at the request of the United
     States or any State thereof or any department, agency or instrumentality of
     either, or to secure partial, progress, advance or other payments to the
     Company or any Restricted Subsidiary by such governmental unit pursuant to
     the provisions of any contract or statute.
 
                                   ARTICLE 5
 
                                   SUCCESSORS
 
     SECTION 5.01  Limitations on Mergers and Consolidations
 
     Neither the Company nor any Guarantor shall consolidate or merge with or
into any Person, or sell, lease, convey or otherwise dispose of all or
substantially all of its assets, or assign any of its obligations hereunder or
under the Securities, to any Person, unless:
 
          (i) the Person formed by or surviving such consolidation or merger (if
     other than the Company or such Guarantor, as the case may be), or to which
     such sale, lease, conveyance or other disposition or assignment shall be
     made (collectively, the "Successor"), is a corporation organized and
     existing under
 
                                       15
   21
 
     the laws of the United States or any State thereof or the District of
     Columbia (or, in the case of a Guarantor organized under the laws of a
     jurisdiction outside the United States, a corporation organized and
     existing under the laws of such foreign jurisdiction), and the Successor
     assumes by supplemental indenture in a form satisfactory to the Trustee all
     of the obligations of the Company or such Guarantor, as the case may be,
     under this Indenture and the Securities;
 
          (ii) immediately after giving effect to such transaction, no Default
     or Event of Default shall have occurred and be continuing; and
 
          (iii) the Company shall have delivered to the Trustee prior to the
     consummation of the proposed transaction an Officers' Certificate and an
     Opinion of Counsel, each stating that the proposed transaction and such
     supplemental indenture comply with this Indenture.
 
     SECTION 5.02  Successor Corporation Substituted
 
     Upon any consolidation or merger of the Company or any Guarantor, or any
sale, lease, conveyance or other disposition of all or substantially all of the
assets of the Company or any Guarantor or any assignment of the obligations of
the Company or any Guarantor under this Indenture or the Securities in
accordance with Section 5.01, the Successor formed by such consolidation or into
or with which the Company or such Guarantor is merged or to which such sale,
lease, conveyance or other disposition or assignment is made shall succeed to,
and be substituted for, and may exercise every right and power of, the Company
or such Guarantor, as the case may be, under this Indenture and the Securities
with the same effect as if such Successor had been named as the Company or such
Guarantor herein and the predecessor Company or Guarantor, in the case of a
sale, lease, conveyance or other disposition or assignment, shall be released
from all obligations under this Indenture and the Securities.
 
                                   ARTICLE 6
 
                             DEFAULTS AND REMEDIES
 
     SECTION 6.01  Events of Default
 
     An "Event of Default" occurs if:
 
          (1) the Company or any Guarantor defaults in the payment of interest
     on any Security when the same becomes due and payable and the Default
     continues for a period of 30 days;
 
          (2) the Company or any Guarantor defaults in the payment of the
     principal of or premium, if any, on any Security when the same becomes due
     and payable at maturity, upon acceleration or otherwise;
 
          (3) the Company or any Guarantor fails to comply with any of its other
     agreements or covenants in, or provisions of, the Securities, the
     Guarantees or this Indenture and such failure continues for the period and
     after the notice specified in the last paragraph of this Section 6.01;
 
          (4) any default shall occur which results in the acceleration of the
     maturity of any Indebtedness of the Company or any Restricted Subsidiary
     (other than the Securities or any Non-Recourse Indebtedness) having an
     outstanding principal amount of $20 million or more individually or, taken
     together with all other such Indebtedness that has been so accelerated, in
     the aggregate; or any default shall occur in the payment of any principal
     or interest in respect of any Indebtedness of the Company or any Restricted
     Subsidiary (other than the Securities or any Non-Recourse Indebtedness)
     having an outstanding principal amount of $20 million or more individually
     or, taken together with all other such Indebtedness with respect to which
     any such payment has not been made, in the aggregate and such default shall
     be continuing for a period of 30 days without the Company or such
     Restricted Subsidiary, as the case may be, effecting a cure of such
     default;
 
          (5) a judgment or order for the payment of money in excess of $20
     million (net of applicable insurance coverage which is acknowledged in
     writing by the insurer) shall be rendered against the
 
                                       16
   22
 
     Company or any Restricted Subsidiary and such judgment or order shall
     continue unsatisfied and unstayed for a period of 30 days;
 
          (6) the Company or any Restricted Subsidiary pursuant to or within the
     meaning of any Bankruptcy Law:
 
             (a) commences a voluntary case,
 
             (b) consents to the entry of an order for relief against it in an
        involuntary case,
 
             (c) consents to the appointment of a Custodian of it or for all or
        substantially all of its property, or
 
             (d) makes a general assignment for the benefit of its creditors; or
 
          (7) a court of competent jurisdiction enters an order or decree under
     any Bankruptcy Law that:
 
             (a) is for relief against the Company or any Restricted Subsidiary
        as debtor in an involuntary case,
 
             (b) appoints a Custodian of the Company or any Restricted
        Subsidiary or a Custodian for all or substantially all of the property
        of the Company or any Restricted Subsidiary, or
 
             (c) orders the liquidation of the Company or any Restricted
        Subsidiary,
 
     and the order or decree remains unstayed and in effect for 60 days.
 
     The term "Custodian" means any receiver, trustee, assignee, liquidator or
similar official under any Bankruptcy Law.
 
     The Trustee shall not be deemed to know of a Default unless a Trust Officer
at the Corporate Trust Office of the Trustee has actual knowledge of such
Default or the Trustee receives written notice at the Corporate Trust Office of
the Trustee of such Default with specific reference to such Default.
 
     A Default under clause (3) is not an Event of Default until the Trustee
notifies the Company and, in the case of a Default by a Guarantor, such
Guarantor, or the Holders of at least 25% in principal amount of the then
outstanding Securities notify the Company, such Guarantor (where applicable) and
the Trustee, of the Default, and neither the Company nor such Guarantor cures
the Default within 60 days after receipt of the notice. The notice must specify
the Default, demand that it be remedied and state that the notice is a "Notice
of Default."
 
     SECTION 6.02  Acceleration
 
     If an Event of Default (other than an Event of Default specified in clauses
(6) or (7) of Section 6.01) occurs and is continuing, the Trustee by notice to
the Company, or the Holders of at least 25% in principal amount of the then
outstanding Securities by notice to the Company and the Trustee, may declare the
principal of and premium, if any, and accrued and unpaid interest on all then
outstanding Securities to be due and payable immediately. Upon any such
declaration the amounts due and payable on the Securities, as determined in
accordance with the next succeeding paragraph, shall be due and payable
immediately. If an Event of Default specified in clause (6) or (7) of Section
6.01 occurs, such amounts shall ipso facto become and be immediately due and
payable without any declaration, notice or other act on the part of the Trustee
or any Holder. The Holders of a majority in principal amount of the then
outstanding Securities by written notice to the Trustee may rescind an
acceleration and its consequences (other than nonpayment of principal of, or
premium, if any, or interest on the Securities) if the rescission would not
conflict with any judgment or decree and if all existing Events of Default have
been cured or waived.
 
     In the event that the maturity of the Securities is accelerated pursuant to
this Section 6.02, 100% of the principal amount thereof shall become due and
payable plus accrued interest to the date of payment.
 
                                       17
   23
 
     SECTION 6.03  Other Remedies
 
     If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy to collect the payment of principal of, or premium, if any, or
interest on the Securities or to enforce the performance of any provision of the
Securities or this Indenture.
 
     The Trustee may maintain a proceeding even if it does not possess any of
the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Holder in exercising any right or remedy accruing
upon an Event of Default shall not impair the right or remedy or constitute a
waiver of or acquiescence in the Event of Default. All remedies are cumulative
to the extent permitted by law.
 
     SECTION 6.04  Waiver of Existing Defaults
 
     Subject to Sections 6.07 and 9.02, the Holders of a majority in principal
amount of the then outstanding Securities by notice to the Trustee may waive an
existing Default or Event of Default and its consequences (including waivers
obtained in connection with a tender offer or exchange offer for Securities or a
solicitation of consents in respect of Securities, provided that in each case
such offer or solicitation is made to all Holders of then outstanding Securities
on equal terms), except a continuing Default or Event of Default in the payment
of the principal of, or premium, if any, or interest on any Security. 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 6.05  Control by Majority
 
     The Holders of a majority in principal amount of the then outstanding
Securities may 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 it hereunder. However, the Trustee may refuse to follow any
direction that conflicts with applicable law or this Indenture, that the Trustee
determines may be unduly prejudicial to the rights of other Holders, or that may
involve the Trustee in personal liability.
 
     SECTION 6.06  Limitations on Suits
 
     Subject to Section 6.07, a Holder may pursue a remedy with respect to this
Indenture (including the Guarantees) or the Securities only if:
 
          (1) the Holder gives to the Trustee written notice of a continuing
     Event of Default;
 
          (2) the Holders of at least 25% in principal amount of the then
     outstanding Securities make a written request to the Trustee to pursue the
     remedy;
 
          (3) such Holder or Holders offer to the Trustee indemnity reasonably
     satisfactory to the Trustee against any loss, liability or expense; and
 
          (4) the Trustee does not comply with the request within 60 days after
     receipt of the request and the offer of indemnity.
 
A Holder may not use this Indenture to prejudice the rights of another Holder or
to obtain a preference or priority over another Holder.
 
     SECTION 6.07  Rights of Holders to Receive Payment
 
     Notwithstanding any other provision of this Indenture, the right of any
Holder of a Security to receive payment of principal of, and premium, if any,
and interest on the Security, on or after the respective due dates expressed in
the Security, or to bring suit for the enforcement of any such payment on or
after such respective dates, shall not be impaired or affected without the
consent of the Holder.
 
                                       18
   24
 
     SECTION 6.08  Collection Suit by Trustee
 
     If an Event of Default specified in Section 6.01(1) or (2) occurs and is
continuing, the Trustee is authorized to recover judgment in its own name and as
trustee of an express trust against the Company and any Guarantor for the amount
of principal, premium, if any, and interest remaining unpaid on the Securities,
and interest on overdue principal and premium, if any, and, to the extent
lawful, interest on overdue interest, and 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.
 
     SECTION 6.09  Trustee May File Proofs of Claim
 
     The Trustee is authorized to file such proofs of claim and other papers or
documents and to take such actions, including participating as a member, voting
or otherwise, of any committee of creditors, as may be necessary or advisable in
order to have the claims of the Trustee (including any claim for the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel) and the Holders allowed in any judicial proceedings relative to the
Company and any Guarantor or their respective creditors or properties and shall
be entitled and empowered to collect, receive and distribute any money or other
property payable or deliverable on any such claims and any Custodian 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 to
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. To the extent that the payment of any such compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, and any other
amounts due the Trustee under Section 7.07 out of the estate in any such
proceeding, shall be denied for any reason, payment of the same shall be secured
by a Lien on, and shall be paid out of, any and all distributions, dividends,
money, securities and other properties which the Holders of the Securities may
be entitled to receive in such proceeding whether in liquidation or under any
plan of reorganization or arrangement or otherwise. Nothing herein contained
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 Securities 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.
 
     SECTION 6.10  Priorities
 
     If the Trustee collects any money pursuant to this Article, it shall pay
out the money in the following order:
 
          First: to the Trustee for amounts due under Section 7.07;
 
          Second: to Holders for amounts due and unpaid on the Securities for
     principal, premium, if any, and interest ratably, without preference or
     priority of any kind, according to the amounts due and payable on the
     Securities for principal, premium, if any, and interest, respectively; and
 
          Third: to the Company.
 
     The Trustee may fix a record date and payment date for any payment to
Holders pursuant to this Article.
 
     SECTION 6.11  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 or omitted by it as a
Trustee, a court in its discretion may require the filing by any party litigant
in the suit of an undertaking to pay the costs of the suit, and the court in its
discretion may assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant. This Section does
not apply to a suit by the Trustee, a suit by a Holder pursuant to Section 6.07,
or a suit by a Holder or Holders of more than 10% in principal amount of the
then outstanding Securities.
 
                                       19
   25
 
                                   ARTICLE 7
 
                                    TRUSTEE
 
     SECTION 7.01  Duties of Trustee
 
     (1) 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 such exercise, as a prudent man would
exercise or use under the circumstances in the conduct of his own affairs.
 
     (2) Except during the continuance of an Event of Default:
 
          (a) 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
 
          (b) 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,
     the Trustee shall examine such certificates and opinions to determine
     whether or not, on their face, they appear to conform to the requirements
     of this Indenture.
 
     (3) 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:
 
          (a) this paragraph does not limit the effect of paragraph (2) of this
     Section;
 
          (b) the Trustee shall not be liable for any error of judgment made in
     good faith by a Trust Officer, unless it is proved that the Trustee was
     negligent in ascertaining the pertinent facts; and
 
          (c) 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 6.05.
 
     (4) Whether or not therein expressly so provided, every provision of this
Indenture that in any way relates to the Trustee is subject to paragraphs (1),
(2) and (3) of this Section.
 
     (5) No provision of this Indenture shall require the Trustee to expend or
risk its own funds or incur any liability. The Trustee may refuse to perform any
duty or exercise any right or power unless it receives indemnity reasonably
satisfactory to it against any loss, liability or expense.
 
     (6) The Trustee shall not be liable for interest on any money received by
it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law. All money received by the Trustee shall, until applied
as herein provided, be held in trust for the payment of the principal of, and
premium, if any, and interest on the Securities.
 
     SECTION 7.02  Rights of Trustee
 
     (1) The Trustee may rely on any document believed by it to be genuine and
to have been signed or presented by the proper Person. The Trustee need not
investigate any fact or matter stated in the document.
 
     (2) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel or both. The Trustee shall not be
liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. The Trustee may consult with
counsel and the written 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.
 
     (3) The Trustee may act through agents and shall not be responsible for the
misconduct or negligence of any agent appointed with due care.
 
                                       20
   26
 
     (4) The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its rights or
powers conferred upon it by this Indenture.
 
     (5) Unless otherwise specifically provided in this Indenture, any demand,
request, direction or notice from the Company or any Guarantor shall be
sufficient if signed by an Officer of the Company or such Guarantor.
 
     SECTION 7.03  Individual Rights of Trustee
 
     The Trustee in its individual or any other capacity may become the owner or
pledgee of Securities and may otherwise deal with the Company, the Guarantors or
any of their Affiliates with the same rights it would have if it were not
Trustee. Any Agent may do the same with like rights. However, the Trustee is
subject to Sections 7.10 and 7.11.
 
     SECTION 7.04  Trustee's Disclaimer
 
     The Trustee makes no representation as to the validity or adequacy of this
Indenture or the Securities, it shall not be accountable for the Company's use
of the proceeds from the Securities or any money paid to the Company or upon the
Company's direction under any provision hereof, it shall not be responsible for
the use or application of any money received by any Paying Agent other than the
Trustee and it shall not be responsible for any statement or recital herein or
any statement in the Securities other than its certificate of authentication.
 
     SECTION 7.05  Notice of Defaults
 
     If a Default or Event of Default occurs and is continuing and it is known
to the Trustee, the Trustee shall mail to Holders a notice of the Default or
Event of Default within 45 days after it occurs. Except in the case of a Default
or Event of Default in payment of principal of, or premium, if any, or interest
on any Security, the Trustee may withhold the notice if and so long as a
committee of its Trust Officers in good faith determines that withholding the
notice is in the interests of Holders.
 
     SECTION 7.06  Reports by Trustee to Holders
 
     Within 60 days after each January 31, beginning with January 31, 1995, and
in any event prior to March 31 in each year, the Trustee shall mail to Holders a
brief report dated as of such reporting date that complies with TIA sec. 313(a);
provided, however, that if no event described in TIA sec. 313(a) has occurred
within the twelve months preceding the reporting date, no report need be
transmitted. The Trustee also shall comply with TIA sec. 313(b). The Trustee
shall also transmit by mail all reports as required by TIA sec. 313(c).
 
     A copy of each report at the time of its mailing to Holders shall be filed
with the SEC and each securities exchange, if any, on which the Securities are
listed. The Company shall notify the Trustee when the Securities are listed on
any stock exchange.
 
     SECTION 7.07  Compensation and Indemnity
 
     The Company and the Guarantors jointly and severally agree to pay to the
Trustee from time to time reasonable compensation for its acceptance of this
Indenture and services hereunder. The Trustee's compensation shall not be
limited by any law on compensation of a trustee of an express trust. The Company
and the Guarantors jointly and severally agree to reimburse the Trustee upon
request for all reasonable disbursements, advances and expenses incurred by it.
Such expenses shall include the reasonable compensation, disbursements and
expenses of the Trustee's agents and counsel.
 
     The Company and the Guarantors jointly and severally agree to indemnify the
Trustee against any loss, liability or expense incurred by it arising out of or
in connection with the acceptance or administration of its duties under this
Indenture, except as set forth in the next paragraph. The Trustee shall notify
the Company and the Guarantors promptly of any claim for which it may seek
indemnity. The Company shall defend the claim and the Trustee shall cooperate in
the defense. The Trustee may have separate counsel and the
 
                                       21
   27
 
Company and the Guarantors shall pay the reasonable fees and expenses of such
counsel. The Company and the Guarantors need not pay for any settlement made
without their consent, which consent shall not be unreasonably withheld.
 
     Neither the Company nor the Guarantors shall be obligated to reimburse any
expense or indemnify against any loss or liability incurred by the Trustee
through negligence or bad faith.
 
     To secure the payment obligations of the Company and the Guarantors in this
Section, the Trustee shall have a Lien prior to the Securities on all money or
property held or collected by the Trustee, except that held in trust to pay
principal of and premium, if any, and interest on particular Securities. Such
Lien shall survive the satisfaction and discharge of this Indenture.
 
     When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(6) or (7) occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.
 
     SECTION 7.08  Replacement of Trustee
 
     A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section.
 
     The Trustee may resign and be discharged from the trust hereby created by
so notifying the Company and the Guarantors. The Holders of a majority in
principal amount of the then outstanding Securities may remove the Trustee by so
notifying the Trustee and the Company. The Company may remove the Trustee if:
 
          (1) the Trustee fails to comply with Section 7.10;
 
          (2) the Trustee is adjudged a bankrupt or an insolvent or an order for
     relief is entered with respect to the Trustee under any Bankruptcy Law;
 
          (3) a Custodian or public officer takes charge of the Trustee or its
     property; or
 
          (4) the Trustee otherwise becomes incapable of acting.
 
     If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company and the Guarantors shall promptly appoint
a successor Trustee.
 
     If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Holders of at least 10% in principal amount of the then outstanding Securities
may petition any court of competent jurisdiction for the appointment of a
successor Trustee.
 
     If the Trustee fails to comply with Section 7.10, any Holder may petition
any court of competent jurisdiction for the removal of the Trustee and the
appointment of a successor Trustee.
 
     A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company and the Guarantors. Thereupon the
resignation or removal of the retiring Trustee shall become effective, and the
successor Trustee shall have all the rights, powers and duties of the Trustee
under this Indenture. The successor Trustee shall mail a notice of its
succession to Holders. The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, subject to the Lien provided for
in Section 7.07. Notwithstanding replacement of the Trustee pursuant to this
Section 7.08, the obligations of the Company and the Guarantors under Section
7.07 shall continue for the benefit of the retiring Trustee.
 
     SECTION 7.09  Successor Trustee by Merger, etc.
 
     Subject to Section 7.10, if the Trustee consolidates, merges or converts
into, or transfers all or substantially all of its corporate trust business to,
another corporation, the successor corporation without any further act shall be
the successor Trustee; provided, however, that in the case of a transfer of all
or substantially all of its corporate trust business to another corporation, the
transferee corporation expressly assumes all of the Trustee's liabilities
hereunder.
 
                                       22
   28
 
     In case any Securities shall have been authenticated, but not delivered, by
the Trustee then in office, any successor by merger, conversion or consolidation
to such authenticating Trustee may adopt such authentication and deliver the
Securities so authenticated, with the same effect as if such successor Trustee
had itself authenticated such Securities.
 
     SECTION 7.10  Eligibility; Disqualification
 
     There shall at all times be a Trustee hereunder which shall be a
corporation organized and doing business under the laws of the United States of
America, any State thereof or the District of Columbia and authorized under such
laws to exercise corporate trust power, shall be subject to supervision or
examination by Federal or State (or the District of Columbia) authority and
shall have a combined capital and surplus of at least $50 million as set forth
in its most recent published annual report of condition.
 
     The Indenture shall always have a Trustee who satisfies the requirements of
TIA sec.sec. 310(a)(1), 310(a)(2) and 310(a)(5). The Trustee is subject to and
shall comply with the provisions of TIA sec. 310(b) during the period of time
required by this Indenture. Nothing in this Indenture shall prevent the Trustee
from filing with the SEC the application referred to in the penultimate
paragraph of TIA sec. 310(b).
 
     SECTION 7.11  Preferential Collection of Claims Against Company
 
     The Trustee is subject to and shall comply with the provisions of TIA
sec. 311(a), excluding any creditor relationship listed in TIA sec. 311(b). A
Trustee who has resigned or been removed shall be subject to TIA sec. 311(a) to
the extent indicated therein.
 
                                   ARTICLE 8
 
                             DISCHARGE OF INDENTURE
 
     SECTION 8.01  Termination of Company's Obligations
 
     (a) This Indenture shall cease to be of further effect (except that the
Company's and the Guarantors' obligations under Section 7.07 and the Trustee's
and Paying Agent's obligations under Section 8.03 shall survive), and the
Trustee, on demand of the Company, shall execute proper instruments
acknowledging the satisfaction and discharge of this Indenture, when:
 
        (1) either
 
             (A) all outstanding Securities theretofore authenticated and issued
        (other than destroyed, lost or stolen Securities that have been replaced
        or paid) have been delivered to the Trustee for cancellation; or
 
             (B) all outstanding Securities not theretofore delivered to the
        Trustee for cancellation:
 
                (i) have become due and payable, or
 
                (ii) will become due and payable at their stated maturity within
           one year, or
 
                (iii) are to be called for redemption within one year under
           arrangements satisfactory to the Trustee for the giving of notice of
           redemption by the Trustee in the name, and at the expense, of the
           Company,
 
        and the Company, in the case of clause (i), (ii) or (iii) above, has
        deposited or caused to be deposited with the Trustee as funds
        (immediately available to the Holders in the case of clause (i)) in
        trust for the purpose an amount which, together with earnings thereon,
        will be sufficient to pay and discharge the entire indebtedness on such
        Securities for principal, premium, if any, and interest to the date of
        such deposit (in the case of Securities which have become due and
        payable) or to the stated maturity or Redemption Date, as the case may
        be;
 
          (2) the Company has paid all other sums payable by it hereunder; and
 
                                       23
   29
 
          (3) the Company has delivered to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture have been complied with, together with an Opinion of Counsel to
     the same effect.
 
     (b) The Company and the Guarantors may, subject as provided herein,
terminate all of their obligations under this Indenture if:
 
          (1) the Company irrevocably deposits in trust with the Trustee money
     or U.S. Government Obligations sufficient to pay principal of and interest
     on the Securities to maturity, and to pay all other sums payable by it
     hereunder; provided that the Trustee shall have been irrevocably instructed
     to apply such money or the proceeds of such U.S. Government Obligations to
     the payment of said principal and interest with respect to the Securities
     as the same shall become due;
 
          (2) the Company delivers to the Trustee an Officers' Certificate
     stating that all conditions precedent to satisfaction and discharge of this
     Indenture have been complied with, and an Opinion of Counsel to the same
     effect;
 
          (3) no Default or Event of Default shall have occurred and be
     continuing on the date of such deposit; and
 
          (4) the Company shall have delivered to the Trustee an Opinion of
     Counsel from nationally recognized counsel acceptable to the Trustee or a
     tax ruling to the effect that the Holders of the Securities will not
     recognize income, gain or loss for Federal income tax purposes as a result
     of the Company's exercise of its option under this Section 8.01(b) and will
     be subject to Federal income tax on the same amount and in the same manner
     and at the same times as would have been the case if such option had not
     been exercised.
 
     In such event, this Indenture shall cease to be of further effect (except
as provided in the next succeeding paragraph), and the Trustee, on demand of the
Company, shall execute proper instruments acknowledging confirmation of and
discharge under this Indenture.
 
     However, the Company's obligations in Sections 2.03, 2.04, 2.05, 2.06,
2.07, 4.01, 5.01, 7.07, 7.08 and 8.04, the Guarantors' obligations in Sections
5.01, 7.07, 8.04 and 10.01 and the Company's, the Trustee's and Paying Agent's
obligations in Section 8.03 shall survive until the Securities are no longer
outstanding. Thereafter, only the Company's and the Guarantor's obligations in
Section 7.07 and the Trustee's and Paying Agent's obligations in Section 8.03
shall survive.
 
     After such irrevocable deposit made pursuant to this Section 8.01(b) and
satisfaction of the other conditions set forth herein, the Trustee upon request
shall acknowledge in writing the discharge of the Company's and the Guarantors'
obligations under this Indenture except for those surviving obligations
specified above.
 
     In order to have money available on a payment date to pay principal of or
interest on the Securities, the U.S. Government Obligations shall be payable as
to principal or interest on or before such payment date in such amounts as will
provide the necessary money. U.S. Government Obligations shall not be callable
at the issuer's option.
 
     SECTION 8.02  Application of Trust Money
 
     The Trustee or a trustee satisfactory to the Trustee and the Company shall
hold in trust money or U.S. Government Obligations deposited with it pursuant to
Section 8.01. It shall apply the deposited money and the money from U.S.
Government Obligations through the Paying Agent and in accordance with this
Indenture to the payment of principal of and premium, if any, and interest on
the Securities.
 
                                       24
   30
 
     SECTION 8.03  Repayment to Company
 
     The Trustee and the Paying Agent shall promptly pay to the Company upon
written request any excess money or securities held by them at any time.
 
     The Trustee and the Paying Agent shall pay to the Company upon written
request any money held by them for the payment of principal, premium, if any, or
interest that remains unclaimed for two years after the date upon which such
payment shall have become due; provided, however, that the Company shall have
either caused notice of such payment to be mailed to each Holder entitled
thereto no less than 30 days prior to such repayment or within such period shall
have published such notice in a financial newspaper of widespread circulation
published in The City of New York. After payment to the Company, Holders
entitled to the money must look to the Company for payment as general creditors
unless an applicable abandoned property law designates another Person, and all
liability of the Trustee and the Paying Agent with respect to such money shall
cease.
 
     SECTION 8.04  Reinstatement
 
     If the Trustee or the Paying Agent is unable to apply any money or U.S.
Government Obligations in accordance with Section 8.01 by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application, the
obligations of the Company and the Guarantors under this Indenture and the
Securities shall be revived and reinstated as though no deposit had occurred
pursuant to Section 8.01 until such time as the Trustee or the Paying Agent is
permitted to apply all such money or U.S. Government Obligations in accordance
with Section 8.01; provided, however, that if the Company or any Guarantor has
made any payment of principal of or premium, if any, or interest on any
Securities because of the reinstatement of its obligations, the Company or such
Guarantor shall be subrogated to the rights of the Holders of such Securities to
receive such payment from the money or U.S. Government Obligations held by the
Trustee or the Paying Agent.
 
                                   ARTICLE 9
 
                                   AMENDMENTS
 
     SECTION 9.01  Without Consent of Holders
 
     The Company, the Guarantors and the Trustee may amend this Indenture or the
Securities or waive any provision hereof or thereof without the consent of any
Holder:
 
          (1) to cure any ambiguity, omission, defect or inconsistency;
 
          (2) to comply with Section 5.01;
 
          (3) to provide for uncertificated Securities in addition to or in
     place of certificated Securities;
 
          (4) to reflect the release of any Guarantor from its Guarantee, or the
     addition of any Subsidiary of the Company as a Guarantor, in the manner
     provided by this Indenture;
 
          (5) to comply with any requirement in order to effect or maintain the
     qualification of this Indenture under the TIA; or
 
          (6) to make any change that does not adversely affect the rights
     hereunder of any Holder in any material respect.
 
     Upon the request of the Company and the Guarantors, accompanied by a
resolution of the Board of Directors and of the board of directors, board of
trustees or managing partners of each Guarantor authorizing the execution of any
such supplemental indenture, and upon receipt by the Trustee of the documents
described in Section 9.06, the Trustee shall join with the Company and the
Guarantors in the execution of any supplemental indenture authorized or
permitted by the terms of this Indenture and make any further appropriate
agreements and stipulations that may be therein contained. After an amendment or
waiver under
 
                                       25
   31
 
this Section becomes effective, the Company shall mail to the Holders of each
Security affected thereby a notice briefly describing the amendment or waiver.
Any failure of the Company to mail such notice, or any defect therein, shall
not, however, in any way impair or affect the validity of any such supplemental
indenture.
 
     SECTION 9.02  With Consent of Holders
 
     Except as provided below in this Section 9.02, the Company, the Guarantors
and the Trustee may amend this Indenture or the Securities with the written
consent (including consents obtained in connection with a tender offer or
exchange offer for Securities or a solicitation of consents in respect of
Securities, provided that in each case such offer or solicitation is made to all
Holders of then outstanding Securities on equal terms) of the Holders of at
least a majority in principal amount of the then outstanding Securities.
 
     Upon the request of the Company and the Guarantors, accompanied by a
resolution of the Board of Directors and of the board of directors, board of
trustees or managing partners of each Guarantor authorizing the execution of any
such supplemental indenture, and upon the filing with the Trustee of evidence of
the consent of the Holders as aforesaid, and upon receipt by the Trustee of the
documents described in Section 9.06, the Trustee shall join with the Company and
the Guarantors in the execution of such supplemental indenture.
 
     It shall not be necessary for the consent of the Holders under this Section
to approve the particular form of any proposed amendment or waiver, but it shall
be sufficient if such consent approves the substance thereof.
 
     The Holders of a majority in principal amount of the then outstanding
Securities may waive compliance in a particular instance by the Company or the
Guarantors with any provision of this Indenture or the Securities (including
waivers obtained in connection with a tender offer or exchange offer for
Securities or a solicitation of consents in respect of Securities, provided that
in each case such offer or solicitation is made to all Holders of then
outstanding Securities on equal terms). However, without the consent of each
Holder affected, an amendment or waiver under this Section may not:
 
          (1) reduce the amount of Securities whose Holders must consent to an
     amendment, supplement or waiver;
 
          (2) reduce the rate of or change the time for payment of interest,
     including default interest, on any Security;
 
          (3) reduce the principal of or change the fixed maturity of any
     Security or alter the premium or other provisions with respect to
     redemption under Section 3.07 or specified in the Securities;
 
          (4) make any Security payable in money other than that stated in the
     Security;
 
          (5) impair the right to institute suit for the enforcement of any
     payment of principal of, or premium, if any, or interest on any Security
     pursuant to Sections 6.07 and 6.08, except as limited by Section 6.06;
 
          (6) make any change in the percentage of principal amount of
     Securities necessary to waive compliance with certain provisions of this
     Indenture pursuant to Section 6.04 or 6.07 or this sentence of this Section
     9.02; or
 
          (7) waive a continuing Default or Event of Default in the payment of
     principal of, or premium, if any, or interest on the Securities.
 
     The right of any Holder to participate in any consent required or sought
pursuant to any provision of this Indenture (and the obligation of the Company
to obtain any such consent otherwise required from such Holder) may be subject
to the requirement that such Holder shall have been the Holder of record of any
Securities with respect to which such consent is required or sought as of a date
identified by the Trustee in a notice furnished to Holders in accordance with
the terms of this Indenture.
 
                                       26
   32
 
     SECTION 9.03  Compliance with Trust Indenture Act
 
     Every amendment to this Indenture or the Securities shall comply in form
and substance with the TIA as then in effect.
 
     SECTION 9.04  Revocation and Effect of Consents
 
     Until an amendment (which includes any supplement) or waiver becomes
effective, a consent to it by a Holder of a Security is a continuing consent by
the Holder and every subsequent Holder of a Security or portion of a Security
that evidences the same debt as the consenting Holder's Security, even if
notation of the consent is not made on any Security. However, any such Holder or
subsequent Holder may revoke the consent as to his or her Security or portion of
a Security if the Trustee receives written notice of revocation before the date
the amendment or waiver becomes effective. An amendment or waiver becomes
effective in accordance with its terms and thereafter binds every Holder.
 
     The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Holders entitled to consent to any amendment or
waiver. If the Company elects to fix a record date for such purpose, the record
date shall be fixed at (i) the later of 30 days prior to the first solicitation
of such consent or the date of the most recent list of Holders furnished to the
Trustee prior to such solicitation pursuant to Section 2.05, or (ii) such other
date as the Company shall designate. If a record date is fixed, then
notwithstanding the provisions of the immediately preceding paragraph, those
Persons who were Holders at such record date (or their duly designated proxies),
and only those Persons, shall be entitled to consent to such amendment or waiver
or to revoke any consent previously given, whether or not such Persons continue
to be Holders after such record date. No consent shall be valid or effective for
more than 90 days after such record date unless consents from Holders of the
principal amount of Securities required hereunder for such amendment or waiver
to be effective shall have also been given and not revoked within such 90-day
period.
 
     After an amendment or waiver becomes effective, it shall bind every Holder,
unless it is of the type described in any of clauses (1) through (7) of Section
9.02. In such case, the amendment or waiver shall bind each Holder of a Security
who has consented to it and every subsequent Holder of a Security that evidences
the same debt as the consenting Holder's Security.
 
     SECTION 9.05  Notation on or Exchange of Securities
 
     The Trustee may place an appropriate notation about an amendment or waiver
on any Security thereafter authenticated. The Company in exchange for all
Securities may issue and the Trustee shall authenticate new Securities that
reflect the amendment or waiver.
 
     SECTION 9.06  Trustee to Sign Amendments, etc.
 
     The Trustee shall sign any amendment or supplemental indenture authorized
pursuant to this Article if the amendment does not adversely affect the rights,
duties, liabilities or immunities of the Trustee. If it does, the Trustee may,
but need not, sign it. In signing or refusing to sign such amendment or
supplemental indenture, the Trustee shall be entitled to receive and, subject to
Section 7.01, shall be fully protected in relying upon, an Opinion of Counsel as
conclusive evidence that such amendment or supplemental indenture is authorized
or permitted by this Indenture, that it is not inconsistent herewith, and that
it will be valid and binding upon the Company and the Guarantors in accordance
with its terms.
 
                                       27
   33
 
                                   ARTICLE 10
 
                            GUARANTEES OF SECURITIES
 
     SECTION 10.01  Unconditional Guarantees
 
     (a) For value received, (i) the Guarantors, jointly and severally, hereby
fully, unconditionally and absolutely guarantee (the "Guarantees") to the
Holders and to the Trustee the due and punctual payment of the principal of, and
premium, if any, and interest on the Securities and all other amounts due and
payable under this Indenture and the Securities by the Company, and (ii) the
Company hereby fully, unconditionally and absolutely guarantees (the "Company
Guarantee") to the Holders and to the Trustee the obligations of the Guarantors
described in clause (i), each 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 Securities and this Indenture.
 
     (b) Failing payment when due of any amount guaranteed pursuant to the
Guarantees, for whatever reason, each Guarantor will be obligated to pay the
same immediately. Each Guarantee hereunder is intended to be a general,
unsecured, senior obligation of each Guarantor and will rank pari passu in right
of payment with all Indebtedness of each such Guarantor that is not, by its
terms, expressly subordinated in right of payment to the Guarantee of such
Guarantor. Each of the Guarantors hereby agrees that its obligations hereunder
shall be full, unconditional and absolute, irrespective of the validity,
regularity or enforceability of the Securities, the Guarantees or this
Indenture, the absence of any action to enforce the same, any waiver or consent
by any Holder of the Securities with respect to any provisions hereof or
thereof, any release of any other Guarantor, the recovery of any judgment
against the Company, any action to enforce the same or any other circumstance
which might otherwise constitute a legal or equitable discharge or defense of a
Guarantor. Each of the Guarantors hereby agrees that in the event of a default
in payment of the principal of, or premium, if any, or interest on the
Securities, 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 6.06, by the Holders, on
the terms and conditions set forth in this Indenture, directly against each of
the Guarantors to enforce the Guarantees without first proceeding against the
Company.
 
     (c) Failing payment of the Guarantees, for whatever reason, the Company
will be obligated to pay, or to perform or cause the performance of, the same
immediately. The Company Guarantee is intended to be a general, unsecured,
senior obligation of the Company and will rank pari passu in right of payment
with all Indebtedness of the Company that is not, by its terms, expressly
subordinated in right of payment to the Company Guarantee. The Company hereby
agrees that its obligations under the Company Guarantee shall be full,
unconditional and absolute, irrespective of the validity, regularity or
enforceability of the Securities, the Guarantees, the Company Guarantee or this
Indenture, the absence of any action to enforce the same, any waiver or consent
by any Holder of the Securities with respect to any provisions hereof or
thereof, the recovery of any judgment against the Company or any Guarantor, any
action to enforce the same or any other circumstance which might otherwise
constitute a legal or equitable discharge or defense of the Company.
 
     (d) The obligations of each Guarantor and the Company under this Article 10
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, (i) any compromise, settlement,
release, waiver, renewal, extension, indulgence or modification of, or any
change in, any of the obligations and liabilities of the Company or any
Guarantor contained in the Securities or this Indenture, (ii) any impairment,
modification, release or limitation of the liability of the Company, any
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, (iii) the assertion or exercise by the Company, any
Guarantor or the Trustee of any rights or remedies under the Securities or this
Indenture or their delay in or failure to assert or exercise any such rights or
remedies, (iv) the assignment or the purported assignment of any property as
security for the Securities, including all or any part of the rights of the
Company or any Guarantor under this Indenture, (v) the extension of the time for
payment by the Company or any Guarantor of any payments or other sums or any
part thereof owing or payable under any of the terms and provisions of the
Securities or this Indenture or of the time for performance by the Company or
 
                                       28
   34
 
any Guarantor of any other obligations under or arising out of any such terms
and provisions or the extension or the renewal of any thereof, (vi) the
modification or amendment (whether material or otherwise) of any duty, agreement
or obligation of the Company or any Guarantor set forth in this Indenture, (vii)
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 Company or any of the Guarantors or any of
their respective assets, or the disaffirmance of the Securities, the Guarantees,
the Company Guarantee or this Indenture in any such proceeding, (viii) the
release or discharge of the Company or any Guarantor from the performance or
observance of any agreement, covenant, term or condition contained in any of
such instruments by operation of law, (ix) the unenforceability of the
Securities, the Guarantees, the Company Guarantee or this Indenture or (x) any
other circumstance which might otherwise constitute a legal or equitable
discharge of a surety or guarantor.
 
     (e) The Guarantors and the Company each hereby (i) waives diligence,
presentment, demand of payment, filing of claims with a court in the event of
the merger, insolvency or bankruptcy of the Company or a Guarantor, and all
demands whatsoever, (ii) acknowledges that any agreement, instrument or document
evidencing the Guarantees or the Company 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 Guarantees or the Company
Guarantee without notice to them and (iii) covenants that its Guarantee or the
Company Guarantee, as the case may be, will not be discharged except by complete
performance of the Guarantees or the Company Guarantee, as the case may be. Each
Guarantor and the Company further agrees that if at any time all or any part of
any payment theretofore applied by any Person to any Guarantee or the Company
Guarantee is, or must be, rescinded or returned for any reason whatsoever,
including without limitation, the insolvency, bankruptcy or reorganization of
the Company or any Guarantor, such Guarantee or the Company Guarantee, as the
case may be, 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 Guarantees or the Company Guarantee, as the case may be,
shall continue to be effective or be reinstated, as the case may be, as though
such application had not been made.
 
     (f) Each Guarantor shall be subrogated to all rights of the Holders and the
Trustee against the Company in respect of any amounts paid by such Guarantor
pursuant to the provisions of this Indenture, provided, however, that no
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 Securities and the
Guarantees shall have been paid in full or discharged.
 
     (g) A director, officer, employee or stockholder, as such, of any Guarantor
shall not have any liability for any obligations of such Guarantor under this
Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation.
 
     SECTION 10.02  Limitation of Guarantor's Liability
 
     Each Guarantor and by its acceptance hereof each Holder hereby confirms
that it is the intention of all such parties that the guarantee by such
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 each Guarantor hereby irrevocably agree
that the obligations of each Guarantor under its Guarantee shall be limited to
the maximum amount as will, after giving effect to all other contingent and
fixed liabilities of such Guarantor and after giving effect to any collections
from or payments made by or on behalf of any other Guarantor in respect of the
obligations of such other Guarantor under its Guarantee or pursuant to Section
10.03, result in the obligations of such Guarantor under its Guarantee not
constituting a fraudulent conveyance or fraudulent transfer under federal, state
or foreign law.
 
     SECTION 10.03  Contribution
 
     In order to provide for just and equitable contribution among the
Guarantors, the Guarantors agree, inter se, that in the event any payment or
distribution is made by any Guarantor (a "Funding Guarantor") under its
 
                                       29
   35
 
Guarantee, such Funding Guarantor shall be entitled to a contribution from each
other Guarantor in a pro rata amount based on the Adjusted Net Assets of each
Guarantor (including the Funding Guarantor) for all payments, damages and
expenses incurred by the Funding Guarantor in discharging the Company's
obligations with respect to the Securities or any other Guarantor's obligations
with respect to its Guarantee.
 
     SECTION 10.04  Execution and Delivery of Guarantees
 
     To further evidence the Guarantees set forth in Section 10.01, each
Guarantor hereby agrees that a notation relating to such Guarantees shall be
endorsed on each Security authenticated and delivered by the Trustee and
executed by either manual or facsimile signature of two Officers of each
Guarantor.
 
     Each of the Guarantors hereby agrees that its Guarantee set forth in
Section 10.01 shall remain in full force and effect notwithstanding any failure
to endorse on each Security a notation relating to such Guarantee.
 
     If an Officer of a Guarantor whose signature is on this Indenture or a
Security no longer holds that office at the time the Trustee authenticates such
Security or at any time thereafter, such Guarantor's Guarantee of such Security
shall be valid nevertheless.
 
     The delivery of any Security by the Trustee, after the authentication
thereof hereunder, shall constitute due delivery of any Guarantee set forth in
this Indenture on behalf of the Guarantor.
 
     SECTION 10.05  Addition of Guarantors
 
     (a) If any Subsidiary of the Company guarantees any Funded Indebtedness of
the Company other than the Securities at any time subsequent to the Issue Date
(including, without limitation, following any release of such Subsidiary
pursuant to Section 10.06 from any Guarantee previously provided by it under
this Article 10), then the Company shall (i) cause the Securities to be equally
and ratably guaranteed by such Subsidiary, but only to the extent that the
Securities are not already guaranteed by such Subsidiary on reasonably
comparable terms and (ii) cause such Subsidiary to execute and deliver a
supplemental indenture evidencing its provision of a Guarantee in accordance
with clause (b) below.
 
     (b) Any Person that was not a Guarantor on the Issue Date may become a
Guarantor by executing and delivering to the Trustee (i) 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 a Guarantor and (ii) 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 10.06  Release of Guarantee
 
     Notwithstanding anything to the contrary in this Article 10, in the event
that any Guarantor shall no longer be a guarantor of any Funded Indebtedness of
the Company other than the Securities, and so long as no Default or Event of
Default shall have occurred or be continuing, such Guarantor, upon giving notice
to the Trustee to the foregoing effect, shall be deemed to be released from all
of its obligations under this Indenture and the Guarantee of such Guarantor
shall be of no further force or effect. Following the receipt by the Trustee of
any such notice, the Company 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
such Guarantor.
 
     SECTION 10.07 Consent to Jurisdiction and Service of Process
 
     Each Guarantor that is not organized under the laws of the United States
(including the States and the District of Columbia) (each a "Non-U.S.
Guarantor") hereby appoints the principal office of CT Corporation System in The
City of New York which, on the date hereof, is located at 1633 Broadway, New
York, New York 10019, as the authorized agent thereof (the "Authorized Agent")
upon whom process may be served in
 
                                       30
   36
 
any action, suit or proceeding arising out of or based on this Indenture or the
Securities which may be instituted in the Supreme Court of the State of New York
or the United States District Court for the Southern District of New York, in
either case in The Borough of Manhattan, The City of New York, by the Holder of
any Security, and each Non-U.S. Guarantor hereby waives any objection which it
may now or hereafter have to the laying of venue of any such proceeding and
expressly and irrevocably accepts and submits, for the benefit of the Holders
from time to time of the Securities, to the nonexclusive jurisdiction of any
such court in respect of any such action, suit or proceeding, for itself and
with respect to its properties, revenues and assets. Such appointment shall be
irrevocable unless and until the appointment of a successor authorized agent for
such purpose, and such successor's acceptance of such appointment, shall have
occurred. Each Non-U.S. Guarantor agrees to take any and all actions, including
the filing of any and all documents and instruments, that may be necessary to
continue such appointment in full force and effect as aforesaid. Service of
process upon the Authorized Agent with respect to any such action shall be
deemed, in every respect, effective service of process upon any such Non-U.S.
Guarantor. Notwithstanding the foregoing, any action against any Non-U.S.
Guarantor arising out of or based on any Security may also be instituted by the
Holder of such Security in any court in the jurisdiction of organization of such
Non-U.S. Guarantor, and such Non-U.S. Guarantor expressly accepts the
jurisdiction of any such court in any such action. The Company shall require the
Authorized Agent to agree in writing to accept the foregoing appointment as
agent for service of process.
 
     SECTION 10.08 Waiver of Immunity
 
     To the extent that any Non-U.S. Guarantor or any of its properties, assets
or revenues may have or may hereafter become entitled to, or have attributed to
it, any right of immunity, on the grounds of sovereignty or otherwise, from any
legal action, suit or proceeding, from the giving of any relief in any thereof,
from set-off or counterclaim, from the jurisdiction of any court, from service
of process, from attachment upon or prior to judgment, from attachment in aid of
execution of judgment, or from execution of judgment, or other legal process or
proceeding for the giving of any relief or for the enforcement of any judgment,
in any jurisdiction in which proceedings may at any time be commenced, with
respect to its obligations, liabilities or any other matter under or arising out
of or in connection with this Indenture or the Securities, such Non-U.S.
Guarantor, to the maximum extent permitted by law, hereby irrevocably and
unconditionally waives, and agrees not to plead or claim, any such immunity and
consents to such relief and enforcement.
 
     SECTION 10.09  Judgment Currency
 
     Each Non-U.S. Guarantor agrees to indemnify the Trustee and each Holder
against any loss incurred by it as a result of any judgment or order being given
or made and expressed and paid in a currency (the "Judgment Currency") other
than United States dollars and as a result of any variation as between (i) the
rate of exchange at which the United States dollar amount is converted into the
Judgment Currency for the purpose of such judgment or order and (ii) the spot
rate of exchange in The City of New York at which the Trustee or such Holder on
the date of payment of such judgment or order is able to purchase United States
dollars with the amount of the Judgment Currency actually received by the
Trustee or such Holder. The foregoing indemnity shall constitute a separate and
independent obligation of each Non-U.S. Guarantor and shall continue in full
force and effect notwithstanding any such judgment or order as aforesaid. The
term "spot rate of exchange" shall include any premiums and costs of exchange
payable in connection with the purchase of, or conversion into, United States
dollars.
 
                                       31
   37
 
                                   ARTICLE 11
 
                                 MISCELLANEOUS
 
     SECTION 11.01  Trust Indenture Act Controls
 
     If any provision of this Indenture limits, qualifies or conflicts with the
duties imposed by TIA sec. 318(c) the imposed duties shall control.
 
     SECTION 11.02  Notices
 
     Any notice or communication by the Company, the Guarantors 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 receipt requested), telex,
telecopier or overnight air courier guaranteeing next day delivery, to the
other's address:
 
                       If to the Company or the Guarantors:
 
                       Union Texas Petroleum Holdings, Inc.
                       1330 Post Oak Boulevard
                       Houston, Texas 77056
                       Attention: General Counsel
 
                       If to the Trustee:
 
                       The First National Bank of Chicago
                       One First National Plaza, Suite 0126
                       Chicago, IL 60670-0126
                       Attention: Corporate Trust Services Division
 
     The Company, the Guarantors or the Trustee by notice to the others may
designate additional or different addresses for subsequent notices or
communications.
 
     All 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 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, postage prepaid, to the Holder's address shown on the register kept by the
Registrar. 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 Company or any Guarantor mails a notice or communication to Holders,
it shall mail a copy to the Trustee and each Agent at the same time.
 
     SECTION 11.03  Communication by Holders with Other Holders
 
     Holders may communicate pursuant to TIA sec. 312(b) with other Holders with
respect to their rights under this Indenture or the Securities. The Company, the
Guarantors, the Trustee, the Registrar and anyone else shall have the protection
of TIA sec. 312(c).
 
     SECTION 11.04  Certificate and Opinion as to Conditions Precedent
 
     Upon any request or application by the Company or any Guarantor to the
Trustee to take any action under this Indenture, the Company or such Guarantor
shall furnish to the Trustee:
 
          (1) an Officers' Certificate (which shall include the statements set
     forth in Section 11.05) 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 complied with; and
 
                                       32
   38
 
          (2) an Opinion of Counsel (which shall include the statements set
     forth in Section 11.05) stating that, in the opinion of such counsel, all
     such conditions precedent and covenants have been complied with.
 
     SECTION 11.05  Statements Required in Certificate or Opinion
 
     Each certificate or opinion with respect to compliance with a condition or
covenant provided for in this Indenture shall include:
 
          (1) a statement that the Person making such certificate or opinion has
     read such covenant or condition;
 
          (2) a brief statement as to the nature and scope of the examination or
     investigation upon which the statements or opinions contained in such
     certificate or opinion are based;
 
          (3) a statement that, in the opinion of such Person, he 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
     complied with; and
 
          (4) a statement as to whether or not, in the opinion of such Person,
     such condition or covenant has been complied with.
 
     SECTION 11.06  Rules by Trustee and Agents
 
     The Trustee may make reasonable rules for action by or at a meeting of
Holders. The Registrar or the Paying Agent may make reasonable rules and set
reasonable requirements for its functions.
 
     SECTION 11.07  Legal Holidays
 
     A "Legal Holiday" is a Saturday, a Sunday or a day on which banking
institutions in any of The City of New York, Chicago, Illinois or at a place of
payment are authorized or obligated 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.
 
     SECTION 11.08  No Recourse Against Others
 
     A director, officer, employee or stockholder of the Company or any
Guarantor, as such, shall not have any liability for any obligations of the
Company or such Guarantor under the Securities or this Indenture or for any
claim based on, in respect of or by reason of such obligations or their
creation. Each Holder by accepting a Security waives and releases all such
liability.
 
     SECTION 11.09  Governing Law
 
     This Indenture and the Securities shall be governed by and constructed in
accordance with the laws of the State of New York, without regard to principles
of conflicts of law.
 
     SECTION 11.10  No Adverse Interpretation of Other Agreements
 
     This Indenture may not be used to interpret another indenture, loan or debt
agreement of the Company, any Guarantor or any other Subsidiary of the Company.
Any such indenture, loan or debt agreement may not be used to interpret this
Indenture.
 
     SECTION 11.11  Successors
 
     All agreements of the Company and the Guarantors in this Indenture and the
Securities shall bind their respective successors. All agreements of the Trustee
in this Indenture shall bind its successor.
 
                                       33
   39
 
     SECTION 11.12  Severability
 
     In case any provision in this Indenture or in the Securities 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 11.13  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.
 
     SECTION 11.14  Trustee as Paying Agent and Registrar
 
     The Company initially appoints the Trustee as Paying Agent and Registrar.
 
     SECTION 11.15  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 hereof and shall in no way modify or
restrict any of the terms or provisions hereof.
 
                                       34
   40
 
     IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be
duly executed as of the day and year first above written.
 

                                      UNION TEXAS PETROLEUM HOLDINGS, INC.

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


                                      THE FIRST NATIONAL BANK OF CHICAGO,
                                        as Trustee

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


                                      UNION TEXAS EAST KALIMANTAN LIMITED

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


                                      UNION TEXAS PETROLEUM ENERGY CORPORATION

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


                                      UNION TEXAS INTERNATIONAL CORPORATION

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


                                      UNION TEXAS PRODUCTS CORPORATION

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


                                      UNISTAR, INC.

                                      By:
                                          -------------------------------------
                                          Title:
                
                         
                                       35
   41
 
                                                                       EXHIBIT A
 
                               [FACE OF SECURITY]
 
                      UNION TEXAS PETROLEUM HOLDINGS, INC.
 
                               % SENIOR NOTE DUE
 
                                                                    CUSIP 908640
 
No.                                                             $
 
     Union Texas Petroleum Holdings, Inc., a Delaware corporation (the
"Company"), for value received promises to pay to                     or
registered assigns, the principal sum of                Dollars on
                         .
 
        Interest Payment Dates:           15 and           15

        Record Dates:           1 and           1
 
     Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.
 
     IN WITNESS WHEREOF, the Company has caused this Security to be signed
manually or by facsimile by its duly authorized officers and a facsimile of its
corporate seal to be affixed hereto or imprinted hereon.
 

Dated:


[SEAL]                                     UNION TEXAS PETROLEUM HOLDINGS, INC.

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

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


                                           Certificate of Authentication:

                                           THE FIRST NATIONAL BANK OF CHICAGO,
                                           as Trustee, certifies that this is 
                                           one of the Securities referred to 
                                           in the within-mentioned Indenture.

                                           By:
                                               -------------------------------
                                                     Authorized Signature
 

                                       A-1
   42
 
                             [REVERSE OF SECURITY]
 
                      UNION TEXAS PETROLEUM HOLDINGS, INC.
 
                               % SENIOR NOTE DUE
 
     1. Interest. Union Texas Petroleum Holdings, Inc., a Delaware corporation
(the "Company"), promises to pay interest on the principal amount of this
Security at      % per annum from                , 1994 until maturity. The
Company will pay interest semiannually on                and                of
each year (each an "Interest Payment Date"), or if any such day is not a
Business Day, on the next succeeding Business Day. Interest on the Securities
will accrue from the most recent Interest Payment Date on which interest has
been paid or, if no interest has been paid, from                , 1994;
provided, that if there is no existing Default in the payment of interest, and
if this Security 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             , 1994. The Company shall pay
interest on overdue principal and premium, if any, from time to time on demand
at a rate equal to the interest rate then in effect; it shall pay interest on
overdue installments of interest (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 Company will pay interest on the Securities
(except defaulted interest) to the Persons who are registered Holders of
Securities at the close of business on the record date next preceding the
Interest Payment Date, even if such Securities are canceled after such record
date and on or before such Interest Payment Date. The Holder must surrender this
Security to a Paying Agent to collect principal payments. The Company will pay
the principal of, premium, if any, and interest on the Securities in money of
the United States of America that at the time of payment is legal tender for
payment of public and private debts. The Company, however, may pay such amounts
by check payable in such money. It may mail an interest check to a Holder's
registered address.
 
     3. Ranking and Guarantees. The Securities will be senior unsecured
obligations of the Company. The Company's obligations to pay principal, premium,
if any, and interest with respect to the Securities are unconditionally
guaranteed on a joint and several basis (the "Guarantees") by the guarantors
(the "Guarantors") parties to the Indenture. Each of the Guarantees will be an
unsecured obligation of the Guarantor providing such Guarantee. Certain
limitations to the obligations of the Guarantors are set forth in further detail
in the Indenture. References herein to the Indenture or the Securities shall be
deemed also to refer to the Guarantees set forth in the Indenture except where
the context otherwise requires.
 
     4. Paying Agent and Registrar. Initially, The First National Bank of
Chicago, the Trustee under the Indenture, will act as Paying Agent and
Registrar. The Company may change any Paying Agent, Registrar or co-registrar
without notice to any Holder. The Company may act in any such capacity.
 
     5. Indenture. The Company issued the Securities under an Indenture dated as
of           , 1994 (the "Indenture") among the Company, the Guarantors and the
Trustee. The terms of the Securities include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of
1939, as amended (15 U.S. Code sec.sec. 77aaa-77bbbb) as in effect on the date
of execution of the Indenture. The Securities are subject to all such terms, and
Holders are referred to the Indenture and such Act for a statement of such
terms. The Securities are unsecured general obligations of the Company limited
to $200,000,000 in aggregate principal amount.
 
     6. Optional Redemption. The Securities may be redeemed at any time, at the
option of the Company, in whole or from time to time in part, at a price equal
to 100% of their principal amount plus accrued and unpaid interest, if any, to
the Redemption Date plus the Make-Whole Premium, if any (the "Redemption
Price").
 
                                       A-2
   43
 
The amount of the Make-Whole Premium with respect to any Security (or portion
thereof) to be redeemed will be the excess, if any, of:
 
          (i) 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 Security (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 Security (or 
                 portion thereof) being redeemed;
 
     over
 
          (ii) the principal amount of the Security (or portion thereof) being
                redeemed.
 
The present values of interest and principal payments referred to in clause (i)
above will be determined in accordance with generally accepted principles of
financial analysis. Such 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 Treasury Yield. The Make-Whole Premium shall be
calculated by an Independent Investment Banker (as defined in the Indenture).
 
     For purposes of determining the Make-Whole Premium, "Treasury Yield" means
a rate of interest per annum equal to the weekly average yield to maturity of
United States Treasury Notes that have a constant maturity that corresponds to
the remaining term to maturity of the Securities, calculated to the nearest
1/12 of a year (the "Remaining Term"). The 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 Notes 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 (the "H.15 Statistical Release"). If the H.15 Statistical
Release sets forth a weekly average yield for United States Treasury Notes
having a constant maturity that is the same as the Remaining Term, then the
Treasury Yield will be equal to such weekly average yield. In all other cases,
the Treasury Yield will be calculated by interpolation, on a straight-line
basis, between the weekly average yields on the United States Treasury Notes
that have a constant maturity closest to and greater than the Remaining Term and
the United States Treasury Notes 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). Any weekly average yields so calculated by interpolation will be
rounded to the nearest 1/100 of 1%, with any figure of 1/200% or above being
rounded upward. If weekly average yields for United States Treasury Notes are
not available in the H.15 Statistical Release or otherwise, then the Treasury
Yield will be calculated by interpolation of comparable rates selected by the
Independent Investment Banker.
 
     Periodic interest installments with respect to which the Interest Payment
Date is on or prior to any Redemption Date will be payable to the Holders of
record at the close of business on the relevant record dates referred to herein,
all as provided in the Indenture.
 
     Notice of redemption will be mailed at least 30 days but not more than 60
days before the Redemption Date to each Holder of Securities to be redeemed at
his registered address. Securities in denominations larger than $1,000 may be
redeemed in part but only in whole multiples of $1,000, provided that if all the
Securities of a Holder are to be redeemed, the entire outstanding amount of
Securities held by such Holder, even if not a whole multiple of $1,000, will be
redeemed. On and after the Redemption Date interest will cease to accrue on
Securities or on the portions thereof called for redemption, as the case may be.
 
     7. Denominations, Transfer, Exchange. The Securities are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000. The
transfer of Securities may be registered and Securities 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 to pay any taxes and fees required by law or permitted by the Indenture. The
Registrar need not exchange or register the
 
                                       A-3
   44
 
transfer of any Security or portion of a Security selected for redemption. Also,
it need not exchange or register the transfer of any Securities for a period of
15 days before a selection of Securities to be redeemed or during the period
between a record date and the corresponding Interest Payment Date.
 
     8. Persons Deemed Owners. The registered Holder of a Security shall be
treated as its owner for all purposes.
 
     9. Amendments and Waivers. Subject to certain exceptions and limitations,
the Indenture or the Securities may be amended or supplemented with the consent
of the Holders of at least a majority in principal amount of the then
outstanding Securities, and any existing Default under, or compliance with any
provision of, the Indenture may be waived (other than any continuing Default or
Event of Default in the payment of the principal of or premium, if any, or
interest on the Securities) by the Holders of at least a majority in principal
amount of the Securities then outstanding in accordance with the terms of the
Indenture. Without the consent of any Holder, the Company, the Guarantors and
the Trustee may amend or supplement the Indenture or the Securities to cure any
ambiguity, omission, defect or inconsistency; to provide for uncertificated
Securities in addition to or in place of certificated Securities; to provide for
the assumption of the obligations of the Company and each Guarantor under the
Indenture to Holders in the case of the merger, consolidation or sale or other
disposition of all or substantially all of the assets of the Company or any
Guarantor; to reflect the release of any Guarantor from its Guarantee to the
extent permitted by the Indenture; to make any change that does not materially
adversely affect the rights of any Holder; or to comply with the qualification
of the Indenture under the Trust Indenture Act of 1939, as amended.
 
     The right of any Holder to participate in any consent required or sought
pursuant to any provision of the Indenture (and the obligation of the Company to
obtain any such consent otherwise required from such Holder) may be subject to
the requirement that such Holder shall have been the Holder of record of any
Securities with respect to which such consent is required or sought as of a date
identified by the Trustee in a notice furnished to Holders in accordance with
the terms of the Indenture.
 
     Without the consent of each Holder affected, the Company may not (i) reduce
the amount of Securities whose Holders must consent to an amendment, supplement
or waiver, (ii) reduce the rate of or change the time for payment of interest,
including default interest, on any Security, (iii) reduce the principal of or
change the fixed maturity of any Security or alter the premium or other
provisions with respect to redemption, (iv) make any Security payable in money
other than that stated in the Security, (v) impair the right to institute suit
for the enforcement of any payment of principal of, or premium, if any, or
interest on any Security, (vi) make any change in the percentage of principal
amount of Securities necessary to waive compliance with certain provisions of
the Indenture or (vii) waive a continuing Default or Event of Default in the
payment of principal of or premium, if any, or interest on the Securities.
 
     10. Defaults and Remedies. Events of Default include: default in payment of
interest on the Securities for 30 days; default in payment of principal of or
premium, if any, on the Securities; failure by the Company or any Guarantor for
60 days after written notice by the Trustee or by the Holders of at least 25% of
the aggregate principal amount of the Securities then outstanding to it to
comply with any of its other covenants or agreements in the Indenture, the
Guarantees or the Securities; the acceleration of the maturity of any
Indebtedness of the Company or any Restricted Subsidiary (other than the
Securities or any Non-Recourse Indebtedness) that has an outstanding principal
amount of $20 million or more individually or in the aggregate; a default in the
payment of principal or interest in respect of any Indebtedness of the Company
or any Restricted Subsidiary (other than the Securities or any Non-Recourse
Indebtedness) having an outstanding principal amount of $20 million or more
individually or in the aggregate, and such default shall be continuing for a
period of 30 days without the Company or such Restricted Subsidiary, as the case
may be, effecting a cure of such default; a judgment or order for the payment of
money in excess of $20 million (net of applicable insurance coverage which is
acknowledged in writing by the insurer) having been rendered against the Company
or any Restricted Subsidiary and such judgment or order shall continue
unsatisfied and unstayed for a period of 30 days; or certain events involving
bankruptcy, insolvency or reorganization of the Company or any Restricted
Subsidiary. If an Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Securities
may declare the principal of, and premium, if
 
                                       A-4
   45
 
any, and interest on all the Securities to be immediately due and payable,
except that in the case of an Event of Default arising from certain events of
bankruptcy, insolvency or reorganization of the Company or any Restricted
Subsidiary, all outstanding Securities become due and payable immediately
without further action or notice. The amount due and payable upon the
acceleration of any Security is equal to 100% of the principal amount thereof
plus accrued interest to the date of payment. Holders may not enforce the
Indenture or the Securities except as provided in the Indenture. The Trustee may
require indemnity reasonably satisfactory to it before it enforces the Indenture
or the Securities. Subject to certain limitations, Holders of a majority in
principal amount of the then outstanding Securities may direct the Trustee in
its exercise of any trust or power. The Trustee may withhold from Holders notice
of any continuing default (except a default in payment of principal or interest)
if it determines that withholding notice is in their interests. The Company must
furnish an annual compliance certificate to the Trustee.
 
     11. Trustee Dealings with Company and Guarantors. The Trustee, in its
individual or any other capacity, may make loans to, accept deposits from, and
perform services for the Company, the Guarantors or their respective Affiliates,
and may otherwise deal with the Company, the Guarantors or their respective
Affiliates, as if it were not Trustee.
 
     12. No Recourse against Others. A director, officer, employee or
stockholder, as such, of the Company or any Guarantor shall not have any
liability for any obligations of the Company or such Guarantor under the
Securities 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
Security waives and releases all such liability. The waiver and release are part
of the consideration for the issuance of the Securities.
 
     13. Authentication. This Security shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.
 
     14. 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).
 
     The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Request may be made to:
 
          Union Texas Petroleum Holdings, Inc.
          1330 Post Oak Boulevard
          Houston, Texas 77056
          Attention: General Counsel
 
                                       A-5
   46
 
                          FORM OF NOTATION ON SECURITY
                             RELATING TO GUARANTEES
 
     Each 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 Securities and all other amounts due and payable under the Indenture and
the Securities by the Company.
 
     The obligations of the Guarantors to the Holders of Securities and to the
Trustee pursuant to the Guarantees and the Indenture are expressly set forth in
Article 10 of the Indenture and reference is hereby made to the Indenture for
the precise terms of the Guarantees.
 
                                            UNION TEXAS EAST KALIMANTAN LIMITED

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

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

                                            UNION TEXAS PETROLEUM ENERGY
                                              CORPORATION

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

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

                                            UNION TEXAS INTERNATIONAL
                                              CORPORATION

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

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

                                            UNION TEXAS PRODUCTS CORPORATION

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

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

 
                                            UNISTAR, INC.

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

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

 
                                       A-6
   47
 
                          FORM OF NOTATION ON SECURITY
                         RELATING TO COMPANY GUARANTEE
 
     The Company (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 obligations of
the Guarantors pursuant to the Guarantees set forth in Article 10 of the
Indenture.
 
     The obligations of the Company to the Holders of Securities and to the
Trustee pursuant to the Company Guarantee and the Indenture are expressly set
forth in Article 10 of the Indenture and reference is hereby made to the
Indenture for the precise terms of the Company Guarantee.
 

                                           UNION TEXAS PETROLEUM HOLDINGS, INC.

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

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

 
                                       A-7
   48
 
                                ASSIGNMENT FORM
 
     To assign this Security, fill in the form below: (I) or (we) assign and
transfer this Security to
 
- --------------------------------------------------------------------------------
             (Insert assignee's social security or tax I.D. number)
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
             (Print or type assignee's name, address and zip code)

and irrevocably appoint
                        --------------------------------------------------------
as agent to transfer this Security on the books of the Company. The agent may
substitute another to act for him.
 
- --------------------------------------------------------------------------------
 
Date:                     Your Signature:
      ------------------                  -------------------------------------
                                          (Sign exactly as your name appears on 
                                                the face of this Security)
 
Signature Guarantee:
                     ----------------------------------------------------------
                                (Participant in a Recognized Signature 
                                      Guaranty Medallion Program)
 

                                       A-8