UNION TEXAS PETROLEUM HOLDINGS INC
8-K, 1995-05-18
CRUDE PETROLEUM & NATURAL GAS
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<PAGE>   1

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549



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



                                  FORM 8-K


                               CURRENT REPORT
                      PURSUANT TO SECTION 13 OR 15(d) OF
                     THE SECURITIES EXCHANGE ACT OF 1934



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



Date of Report (Date of earliest event reported): May 18, 1995


                     UNION TEXAS PETROLEUM HOLDINGS, INC.
            (Exact name of registrant as specified in its charter)


          Delaware                   1-9019               76-0040040
(State or other jurisdiction       (Commission          (IRS Employer
     of incorporation)             File Number)       Identification No.)



               1330 Post Oak Boulevard, Houston, Texas 77056
            (Address of principal executive offices) (Zip Code)


      Registrant's telephone number, including area code (713) 623-6544

<PAGE>   2
Item 5.     OTHER EVENTS.

        Union Texas Petroleum Holdings, Inc. filed with the Securities and
Exchange Commission on April 21, 1995 a Registration Statement (33-58735) for
10,000,000 shares of common stock offered by certain shareholders of the
Company, plus an additional 1,500,000 shares to cover over-allotments, if any.
Forms of U.S. and international underwriting agreements, which are filed as
exhibits herewith, are incorporated by reference hereto and to such
Registration Statement.

        The amendment to the Restated Certificate of Incorporation of the
Company was approved by the shareholders of the Company at the annual meeting
held on May 10, 1995. The Certificate of Amendment of Restated Certificate of
Incorporation, which is filed as an exhibit herewith, is incorporated by
reference hereto.

        The information set forth in the press release of the registrant dated
May 10, 1995, which is filed as an exhibit hereto, is incorporated herein by
reference.

Item 7.     FINANCIAL STATEMENTS AND EXHIBITS.

            (c)  Exhibits:


<TABLE>
<CAPTION>
Exhibit
Number      Description
- ------      -----------
 <S>        <C>
  1.1       Form of U.S. Underwriting Agreement.

  1.2       Form of International Underwriting Agreement.

  3.1       Restated Certificate of Incorporation of Union Texas Petroleum 
            Holdings, Inc., as amended through May 10, 1995.

 99.1       Press release dated May 10, 1995.

</TABLE>

















<PAGE>   3

                                 Signature


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


                                      UNION TEXAS PETROLEUM HOLDINGS, INC.


                                      By: /s/ NEWTON W. WILSON, III
                                          -------------------------------
                                          Newton W. Wilson, III
                                          General Counsel, Vice President-
                                          Administration and Secretary



Date: May 18, 1995
<PAGE>   4


                             INDEX TO EXHIBITS


    Exhibit
    Number                  Description
    -------                 -----------

      1.1          Form of U.S. Underwriting Agreement.

      1.2          Form of International Underwriting Agreement.

      3.1          Restated Certificate of Incorporation of Union Texas 
                   Petroleum Holdings, Inc., as amended through May 10, 1995.

     99.1          Press release dated May 10, 1995.


<PAGE>   1

                                                                     
                                                                     EXHIBIT 1.1




                      Union Texas Petroleum Holdings, Inc.

                                  Common Stock
                           (par value $.05 per share)

                             Underwriting Agreement
                                (U.S. Version)       

                                                               ________ __, 199_

SALOMON BROTHERS INC
CS FIRST BOSTON CORPORATION
GOLDMAN, SACHS & CO.
MERRILL LYNCH & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
  As representatives of the
  several Underwriters named
  in Schedule I hereto
c/o SALOMON BROTHERS INC
Seven World Trade Center
New York, New York  10048

Dear Sirs:
                 Petroleum Associates, L.P. and KKR Partners II, L.P.
(together, the "Selling Stockholders"), propose, subject to the terms and
conditions stated herein, to sell to the Underwriters named in Schedule I
hereto (the "Underwriters") an aggregate of 8,000,000 shares (the "Firm
Shares") and, at the election of the Underwriters, up to 1,200,000 additional
shares (the "Optional Shares") of Common Stock, par value $.05 per share (the
"Stock"), of Union Texas Petroleum Holdings, Inc., a Delaware corporation (the
"Company").  The Firm Shares and the Optional Shares which the Underwriters
elect to purchase pursuant to Section 2 hereof are collectively referred to
herein as the "Shares".

                 It is understood and agreed to by all parties that the Company
and the Selling Stockholders are concurrently entering into an agreement (the
"International Underwriting Agreement") providing for the sale by the Selling
Stockholders of up to a total of 2,300,000 shares of Stock (the "International
Shares"), including the over-allotment option thereunder, through arrangements
with certain underwriters outside the United States (the "International
Underwriters"), for whom Salomon Brothers International Limited, CS First
Boston Limited, Goldman Sachs International and Merrill Lynch
International Limited are acting as representatives.  Anything herein or
therein to the contrary notwithstanding, the respective closings under this
Agreement and the International Underwriting Agreement are hereby expressly
made conditional on one another.  The Underwriters hereunder and the
International Underwriters are simultaneously entering into an Agreement
between U.S. and International Underwriting Syndicates (the "Agreement between
Syndicates") which provides, among other things, for the transfer of shares of
Stock between the two syndicates.  Two forms of prospectus are to be used in
connection with the offering and sale of shares of Stock contemplated by the
foregoing, one relating to the Shares hereunder and the other relating to the
International Shares.  The latter form of prospectus will be identical
<PAGE>   2
to the former except for certain substitute pages as included in the
registration statement and amendments thereto as mentioned below.  Except as
used in Sections 2, 3, 4, 9 and 11 herein, and except as the context may
otherwise require, references hereinafter to the Shares shall include all the
shares of Stock which may be sold pursuant to either this Agreement or the
International Underwriting Agreement, and references herein to any prospectus
whether in preliminary or final form, and whether as amended or supplemented,
shall include both the U.S. and the international versions thereof.

                 1.  (a)  The Company represents and warrants to, and agrees
with, each of the Underwriters that:

                      (i)   A registration statement in respect of the Shares
         has been filed with the Securities and Exchange Commission (the
         "Commission"); such registration statement and any post-effective
         amendment thereto, each in the form heretofore delivered to you, and,
         excluding exhibits thereto but including all documents incorporated by
         reference in the prospectus contained therein, to you for each of the
         other Underwriters, have been declared effective by the Commission in
         such form; no other document with respect to such registration
         statement or document incorporated by reference therein has heretofore
         been filed with the Commission; and no stop order suspending the
         effectiveness of such registration statement has been issued and no
         proceeding for that purpose has been initiated or threatened by the
         Commission (any preliminary prospectus included in such registration
         statement or filed with the Commission pursuant to Rule 424(a) of the
         rules and regulations of the Commission under the Securities Act of
         1933, as amended (the "Act"), being hereinafter called a "Preliminary
         Prospectus"; the various parts of such registration statement,
         including all exhibits thereto and including (i) the information
         contained in the form of final prospectus filed with the Commission
         pursuant to Rule 424(b) under the Act in accordance with Section 5(a)
         hereof and deemed by virtue of Rule 430A under the Act to be part of
         the registration statement at the time it was declared effective and
         (ii) the documents incorporated by reference in the prospectus
         contained in the registration statement at the time such part of the
         registration statement became effective, each as amended at the time
         such part of the registration statement became effective, being
         hereinafter called the "Registration Statement"; the final
         prospectus, in the form first filed with the Commission pursuant to
         Rule 424(b) under the Act, being hereinafter called the "Prospectus";
         any reference herein to any Preliminary Prospectus or the Prospectus
         being deemed to refer to and include the documents incorporated by
         reference therein pursuant to Item 12 of Form S-3 under the Act, as of
         the date of such Preliminary Prospectus or Prospectus, as the case may
         be; any reference to any amendment or supplement to any Preliminary
         Prospectus or the Prospectus being deemed to refer to and include any
         documents filed after the date of such Preliminary Prospectus or
         Prospectus, as the case may be, under the Securities Exchange Act of
         1934, as amended (the "Exchange Act"), and incorporated by reference
         in such Preliminary Prospectus or Prospectus, as the case may be; and
         any reference to any amendment to the Registration Statement shall
         be deemed to refer to and include any annual report of the Company
         filed pursuant to Section 13(a) or 15(d) of the Exchange Act after the
         effective date of the Registration Statement that is incorporated by   
         reference in the Registration Statement);

                      (ii)  No order preventing or suspending the use of any
         Preliminary Prospectus has been issued by the Commission, and each
         Preliminary Prospectus, at the time of filing thereof, conformed in
         all material respects to the requirements of the Act and the published
         rules and regulations of the Commission thereunder, and did not
         contain an untrue statement of a material fact or omit to state a
         material fact required to be stated therein or necessary to make the
         statements therein, in the light of the circumstances under which they
         were made, not misleading; provided, however, that this representation
         and warranty shall not apply to any statements or omissions made in
         reliance upon and in conformity with information furnished in writing
         to the Company by an Underwriter through you expressly for use therein
         or by either Selling Stockholder expressly for use in the preparation
         of the answers therein to Item 7 of Form S-3;



                                           2

<PAGE>   3
                    (iii)   The documents incorporated by reference in the
         Prospectus, when they became effective or were filed with the
         Commission, as the case may be, conformed in all material respects to
         the requirements of the Act or the Exchange Act, as applicable, and
         the published rules and regulations of the Commission thereunder, and
         none of such documents contained an untrue statement of a material
         fact or omitted to state a material fact required to be stated therein
         or necessary to make the statements therein not misleading; and any
         further documents so filed and incorporated by reference in the
         Prospectus or any further amendment or supplement thereto, when such
         documents become effective or are filed with the Commission, as the
         case may be, will conform in all material respects to the requirements
         of the Act or the Exchange Act, as applicable, and the rules and
         regulations of the Commission thereunder and will not contain an
         untrue statement of a material fact or omit to state a material fact
         required to be stated therein or necessary to make the statements
         therein not misleading;

                      (iv)  The Registration Statement conforms, and the
         Prospectus and any further amendments or supplements to the
         Registration Statement or the Prospectus will conform, in all material
         respects to the requirements of the Act and the published rules and
         regulations of the Commission thereunder and do not and will not, as
         of the applicable effective date as to the Registration Statement and
         any amendment thereto and as of the applicable filing date as to the
         Prospectus and any amendment or supplement thereto, contain an untrue
         statement of a material fact or omit to state a material fact required
         to be stated therein or necessary to make the statements therein not
         misleading; provided, however, that this representation and warranty
         shall not apply to any statements or omissions made in reliance upon
         and in conformity with information furnished in writing to the Company
         by an Underwriter through you expressly for use therein or by either
         Selling Stockholder expressly for use in the preparation of the
         answers therein to Item 7 of Form S-3;

                      (v)   None of the Company or any of its subsidiaries or,
         to the best of the Company's knowledge, Unimar Company, a Texas
         general partnership ("Unimar"), has sustained since the date of the
         latest audited financial statements included or incorporated by
         reference in the Prospectus any loss or interference with its business
         from fire, explosion, flood or other calamity, whether or not covered
         by insurance, or from any labor dispute or court or governmental
         action, order or decree, otherwise than as set forth or contemplated
         in the Prospectus, which loss or interference is material to the
         Company and its subsidiaries taken as a whole; and, since the
         respective dates as of which information is given in the Registration
         Statement and the Prospectus, there has not been any change in the
         capital stock (other than (i) any shares of capital stock of the
         Company sold upon exercise of a subscription, option or warrant or the
         conversion of a security outstanding on the date of this Agreement,
         (ii) any shares of such capital stock, or other securities convertible
         or exercisable or exchangeable for such shares, in either case issued
         pursuant to any employee stock option or benefit plan of the Company
         existing on the date of this Agreement and (iii) stock repurchases in  
         accordance with the Company's publicly announced stock repurchase
         program) or any increase of more than $35,000,000 in the consolidated
         short-term or long-term debt of the Company or any material adverse
         change, or any development involving a prospective material adverse
         change, in or affecting the general affairs, management, financial
         position, stockholders' equity or results of operations of the Company
         and its subsidiaries taken as a whole, otherwise than as set forth or
         contemplated in the Prospectus;

                      (vi)  The Company has been duly incorporated and is
         validly existing as a corporation in good standing under the laws of
         the State of Delaware, with power and authority (corporate and other)
         to own its properties and conduct its business as described in the
         Prospectus, and has been duly qualified as a foreign corporation for
         the transaction of business and is in good standing under the laws of
         each other jurisdiction in which it owns or leases properties, or
         conducts any business, so as to require such qualification, or is
         subject to no material liability or disability by reason of the
         failure to be so qualified in any such jurisdiction; each subsidiary
         of the Company identified in Annex II hereto (collectively, the
         "Material Subsidiaries") has been duly incorporated and is validly
         existing as a corporation in good standing under the laws of its
         jurisdiction of incorporation; Unimar has been duly formed and is
         validly existing as a partnership under the laws of the State of
         Texas;





                                       3
<PAGE>   4
         and the Company does not have any subsidiary that is a "significant
         subsidiary" (within the meaning of the published rules and regulations
         of the Commission under the Act) that is not identified in Annex II
         hereto;

                    (vii)   The Company has an authorized capitalization as set
         forth in the Prospectus, and all of the issued shares of capital stock
         of the Company have been duly and validly authorized and issued, are
         fully paid and non-assessable and conform to the description thereof
         contained in the Prospectus; and all of the issued shares of capital
         stock of each Material Subsidiary have been duly and validly
         authorized and issued and are fully paid and non-assessable, and all
         of such shares of capital stock and 50% of the equity interests in
         Unimar (except for directors' qualifying shares and shares held by
         third parties solely to satisfy local law requirements and except as
         set forth in the Prospectus) are owned directly or indirectly by the
         Company, free and clear of all liens, encumbrances, equities or
         claims;

                   (viii)   The Shares have been duly and validly authorized
         and issued, are fully paid and non-assessable and conform to the
         description of the Stock contained in the Prospectus;

                      (ix)  The compliance by the Company with all of the
         provisions of this Agreement and the International Underwriting
         Agreement and the consummation of the transactions herein and therein
         contemplated will not conflict with or result in a breach or violation
         of any of the terms or provisions of, or constitute a default under,
         any indenture, mortgage, deed of trust, loan agreement or other
         agreement or instrument to which the Company or any of its
         subsidiaries or, to the best of the Company's knowledge, Unimar is a
         party or by which the Company or any of its subsidiaries or, to the
         best of the Company's knowledge, Unimar is bound or to which any
         of the property or assets of the Company or any of its subsidiaries
         or, to the best of the Company's knowledge, Unimar is subject, or
         any statute or any order, rule or regulation of any court or
         governmental agency or body having jurisdiction over the Company, any
         of its subsidiaries or, to the best of the Company's knowledge, Unimar
         or any of their properties (excluding conflicts, breaches, violations
         and defaults that, individually or in the aggregate, will not have any
         material adverse effect on the general affairs, management, financial
         position, stockholders' equity, results of operations or prospects of
         the Company and its subsidiaries taken as a whole), nor will any such
         action result in any violation of the provisions of the Restated
         Certificate of Incorporation or By-laws of the Company; and no
         consent, approval, authorization, order, registration or qualification
         of or with any such court or governmental agency or body is required
         for the consummation by the Company of the transactions contemplated
         by this Agreement and the International Underwriting Agreement, except
         the registration under the Act of the Shares and such consents,
         approvals, authorizations, registrations or qualifications as may be
         required under state or foreign securities or Blue Sky laws in
         connection with the purchase and distribution of the Shares by the
         Underwriters and the International Underwriters;

                      (x)   Other than as set forth in the Prospectus, there
         are no legal or governmental proceedings pending to which the Company
         or any of its subsidiaries or, to the best of the Company's knowledge,
         Unimar is a party or of which any property of the Company or any of
         its subsidiaries or, to the best of the Company's knowledge, Unimar is
         the subject which, if determined adversely to the Company or any of
         its subsidiaries or Unimar, would individually or in the aggregate
         have a material adverse effect on the  consolidated financial
         position, stockholders' equity or results of operations of the Company
         and its subsidiaries taken as a whole; and, to the best of the
         Company's knowledge, no such proceedings are threatened or
         contemplated by governmental authorities or threatened by others;

                      (xi)  Price Waterhouse LLP, who have certified certain
         financial statements of the Company and its subsidiaries, are
         independent public accountants as required by the Act and the rules
         and regulations of the Commission thereunder;

                    (xii)   The Shares have been approved for listing on the
         New York Stock Exchange and the Pacific Stock Exchange;

                   (xiii)   The Company is not an "investment company" within
         the meaning of the Investment Company Act of 1940, as amended (the
         "Investment Company Act"), and the published rules and regulations of
         the Commission thereunder, and the offer and sale of the Shares will
         not subject the Company to registration under, or result in a
         violation of, the Investment Company Act;

                     (xiv)   Neither the Company nor any of its affiliates does
         business with the government of Cuba or with any person or affiliate
         located in Cuba within the meaning of Section 517.075, Florida 
         Statutes.

                                       4
<PAGE>   5
                 (b)  Each Selling Stockholder represents and warrants to, and
agrees with, each of the Underwriters and the Company that:

                     (i)   No consent, approval, authorization, order,
         registration or qualification of or with any court or governmental
         agency or body is required for the consummation by such Selling
         Stockholder of the transactions contemplated by this Agreement and the
         International Underwriting Agreement, except the registration under
         the Act of the Shares and such consents, approvals, authorizations,
         registrations or qualifications as may be required under state or
         foreign securities or Blue Sky laws in connection with the purchase
         and distribution of the Shares by the Underwriters and the
         International Underwriters; and such Selling Stockholder has full 
         power and authority to enter into this Agreement and the International
         Underwriting Agreement and to sell, assign, transfer and deliver the
         Shares hereunder and under the International Underwriting Agreement;

                      (ii)  The sale of the Shares hereunder and under the
         International Underwriting Agreement and the compliance by such
         Selling Stockholder with all of the provisions of this Agreement and
         the International Underwriting Agreement and the consummation of the
         transactions herein and therein contemplated will not conflict with or
         result in a breach or violation of any of the terms or provisions of,
         or constitute a default under, any statute, any indenture, mortgage,
         deed of trust, loan agreement or other agreement or instrument to
         which such Selling Stockholder is a party or by which such Selling
         Stockholder is bound, or to which any of the property or assets of
         such  Selling Stockholder is subject, or any statute or any order,
         rule or regulation of any court or governmental agency having
         jurisdiction over such Selling Stockholder or its property (excluding
         conflicts, breaches, violations and defaults that, individually or in
         the aggregate, will not materially adversely affect such Selling
         Stockholder's ability to perform its obligations under this Agreement
         or the International Underwriting Agreement), nor will any such action
         result in any violation of the provisions of the partnership agreement
         or other constituent documents, if any, relating to such Selling 
         Stockholder;

                    (iii)   Such Selling Stockholder has, and immediately prior
         to each Time of Delivery (as defined in Section 4 hereof) such Selling
         Stockholder will have, good and valid title to the Shares to be sold
         at such Time of Delivery hereunder and under the International
         Underwriting Agreement, free and clear of all liens, encumbrances,
         equities or claims (other than the interests of the several
         Underwriters under this Agreement and of the International
         Underwriters under the International Underwriting Agreement); and, upon
         delivery of such Shares and payment therefor pursuant hereto and
         thereto, good and valid title to such Shares, free and clear of all
         liens, encumbrances, equities or claims, will pass to the several
         Underwriters and the International Underwriters;

                      (iv)  No offering, sale, contract to sell, or other 
         disposition of any Stock or any securities exchangeable or convertible
         into or exercisable for any Stock will be made within 90 days after
         the date of the Prospectus, directly or indirectly, by such Selling
         Stockholder, otherwise than hereunder or under the International
         Underwriting Agreement or with your written consent or as described in
         the Prospectus;

                      (v)   Such Selling Stockholder has not taken and will not
         take, directly or indirectly, any action which is designed to or which
         has constituted or which might reasonably be expected to cause or
         result in stabilization or manipulation of the price of any security
         of the Company to facilitate the sale or resale of the Shares; and

                      (vi)  To the extent that any statements or omissions made
         in the Registration Statement, any Preliminary Prospectus, the
         Prospectus or any amendment or supplement thereto are made in reliance
         upon and in conformity with written information furnished to the
         Company by such Selling Stockholder expressly for use therein, such
         Preliminary Prospectus and the Registration Statement did not, and the
         Prospectus and any further amendments or supplements to the
         Registration Statement and the Prospectus, when they become effective
         or are filed with the Commission, as the case may be, will not,
         contain any untrue statement of a material fact or omit





                                       5
<PAGE>   6
         to state any material fact required to be stated therein or necessary
         to make the statements therein not misleading.

                 In order to document the Underwriters' compliance with the
reporting and withholding provisions of the Tax Equity and Fiscal
Responsibility Act of 1982 with respect to the transactions herein
contemplated, each Selling Stockholder agrees to deliver to you prior to or at
the First Time of Delivery (as hereinafter defined) a properly completed and
executed United States Treasury Department Form W-9 (or other applicable form
or statement specified by Treasury Department regulations in lieu thereof).

                 2.  Subject to the terms and conditions herein set forth, (a)
each Selling Stockholder agrees, severally and not jointly, to sell to the
several Underwriters the number of Firm Shares set forth opposite such Selling
Stockholder's name in Schedule II hereto, and each of the Underwriters agrees,
severally and not jointly, to purchase from the Selling Stockholders at a
purchase price per share of $_____ the number of Firm Shares set forth opposite
the name of such Underwriter in Schedule I hereto; each Underwriter shall be
obligated to purchase from each Selling Stockholder at a purchase price per
share of $_____, that number of Firm Shares (to be adjusted by you so as to
eliminate fractional shares) determined by multiplying the aggregate number of
Firm Shares to be sold by such Selling Stockholder as set forth opposite its 
name in Schedule II hereto by a fraction, the numerator of which is the
aggregate number of Firm Shares to be purchased by such Underwriter as set
forth opposite the name of such Underwriter in Schedule I hereto and the
denominator of which is the aggregate number of Firm Shares to be purchased by
all of the Underwriters from both of the Selling Stockholders hereunder and (b)
in the event and to the extent that the Underwriters shall exercise the
election to purchase Optional Shares as provided below, each Selling
Stockholder agrees, severally and not jointly, to sell to each of the
Underwriters, and each of the Underwriters agrees, severally and not jointly,
to purchase from the Selling Stockholders, at the purchase price per share set
forth in clause (a) of this Section 2, that portion of the number of Optional
Shares as to which such election shall have been exercised (to be adjusted by
you so as to eliminate fractional shares) determined by multiplying the number
of Optional Shares set forth opposite such Selling Stockholder's name on
Schedule II hereto by a fraction the numerator of which is the maximum number
of Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of the Optional Shares which all of the  
Underwriters are entitled to purchase hereunder. 


                 The Selling Stockholders hereby grant to the Underwriters the
right to purchase at their election up to 1,200,000 Optional Shares, at the
purchase price per share set forth in the paragraph above, for the sole purpose
of covering over-allotments in the sale of the Firm Shares.  Any such election
to purchase Optional Shares may be exercised by written notice from you to the
Selling Stockholders, given within a period of 30 calendar days after the date
of this Agreement and setting forth the aggregate number of Optional Shares to
be purchased and the date on which such Optional Shares are to be delivered, as
determined by you but in no event earlier than the First Time of Delivery (as
defined in Section 4 hereof) or, unless you and the Selling Stockholders
otherwise agree in writing, earlier than two or later than ten business days
after the date of such notice.

                 3.  Upon the authorization by you of the release of the Firm
Shares, the several Underwriters propose to offer the Firm Shares for sale upon
the terms and conditions set forth in the Prospectus.

                 4.  Certificates in definitive form for the Shares to be
purchased by each Underwriter hereunder, and in such denominations and
registered in such names as Salomon Brothers Inc may request upon at least
forty-eight hours' prior notice to the Company and the Selling Stockholders,
shall be delivered by or on behalf of each Selling Stockholder to you for the
account of such Underwriter, against payment by such Underwriter or on its
behalf of the purchase price therefor by certified or official bank check or
checks, payable to the order of such Selling Stockholder, in New York Clearing
House funds, all at the office of Salomon Brothers Inc, Seven World Trade
Center, New York, New York, or through the facilities of The Depository Trust 
Company.  The time and date of such delivery and payment shall be, with respect
to the Firm Shares, 9:30 a.m., New York time, on ________ __, 199_ or such
other time and date as you, the Company and the Selling Stockholders may agree
upon in writing, and, with respect to the Optional Shares, 9:30 a.m., New York
time, on the date specified by you in the written notice given by you of the
Underwriters' election to purchase such Optional Shares, or such other time and
date as you, the Company and the Selling





                                       6
<PAGE>   7
Stockholders may agree upon in writing.  Such time and date for delivery of the
Firm Shares is herein called the "First Time of Delivery," such time and date
for delivery of the Optional Shares, if not the First Time of Delivery, is
herein called the "Second Time of Delivery", and each such time and date for
delivery is herein called a "Time of Delivery."  Such certificates will be made
available for checking and packaging at least twenty-four hours prior to each
Time of Delivery at such office of Salomon Brothers Inc.

                 5.  The Company agrees with each of the Underwriters and each
of the Selling Stockholders:

                 (a)  To prepare the Prospectus in a form approved by you and
         the Selling Stockholders and to file such Prospectus pursuant to Rule
         424(b) under the Act not later than the Commission's close of business
         on the second business day following the execution and delivery of
         this Agreement, or, if applicable, such earlier time as may be
         required by Rule 430A(a)(3) under the Act; to make no further
         amendment or any supplement to the Registration Statement or   
         Prospectus after the date of this Agreement and prior to the Second
         Time of Delivery (or, if there is no Second Time of Delivery, the
         expiration of the Underwriters' option pursuant to Section 2 hereof)
         which shall be reasonably disapproved by you or the Selling
         Stockholders promptly after reasonable notice thereof; to advise you
         and the Selling Stockholders, promptly after it receives notice
         thereof, of the time when the Registration Statement, or any amendment
         thereto, has been filed or becomes effective or any supplement to the
         Prospectus or any amended Prospectus has been filed and to furnish you
         and the Selling Stockholders copies thereof; to file promptly all
         reports and any definitive proxy or information statements required to
         be filed by the Company with the Commission pursuant to Section 13(a),
         13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the
         Prospectus and for so long as the delivery of a prospectus is required
         in connection with the offering or sale of the Shares; to advise you
         and the Selling Stockholders, promptly after it receives notice
         thereof, of the issuance by the Commission of any stop order or of any
         order preventing or suspending the use of any Preliminary Prospectus
         or prospectus, of the suspension of the qualification of the Shares
         for offering or sale in any jurisdiction, of the initiation or
         threatening of any proceeding for any such purpose, or of any request
         by the Commission for the amending or supplementing of the
         Registration Statement or Prospectus or for additional information;
         and, in the event of the issuance of any stop order or of any order
         preventing or suspending the use of any Preliminary Prospectus or
         prospectus or suspending any such qualification, to use promptly its
         best efforts to obtain its withdrawal;

                 (b)  Promptly from time to time to take such action as you may
         reasonably request to qualify the Shares for offering and sale under
         the securities laws of such jurisdictions as you may request and to
         comply with such laws so as to permit the continuance of sales and
         dealings therein in such jurisdictions for as long as may be necessary
         to complete the distribution of the Shares, provided that in
         connection therewith the Company shall not be required to qualify as a
         foreign corporation or to file a general consent to service of process
         in any jurisdiction;

                 (c)  To furnish the Underwriters with copies of the Prospectus
         in such quantities as you may from time to time reasonably request,
         and, if the delivery of a prospectus is required in the judgment of
         counsel for the Underwriters at any time prior to the expiration of
         nine months after the time of issue of the Prospectus in
         connection with the offering or sale of the Shares and if at such time
         any event shall have occurred as a result of which the Prospectus as
         then amended or supplemented would include an untrue statement of a
         material fact or omit to state any material fact necessary in order to
         make the statements therein, in the light of the circumstances under
         which they were made when such Prospectus is delivered, not
         misleading, or, if for any other reason it shall be necessary during
         such same period to amend or supplement the Prospectus or to file
         under the Exchange Act any document incorporated by reference in the
         Prospectus in order to comply with the Act or the Exchange Act, to
         notify you and upon your request to file such document and to prepare
         and furnish without charge to each Underwriter and to any dealer in
         securities as many copies as you may from time to time reasonably
         request of an amended Prospectus or a supplement to the Prospectus
         which will correct such statement or omission or effect such
         compliance, and in case any Underwriter is required to deliver a
         prospectus in connection with sales of any of the Shares at any time
         nine months or more after the time of issue of the Prospectus, upon
         your request but at the expense





                                       7
<PAGE>   8
         of such Underwriter, to prepare and deliver to such Underwriter as
         many copies as you may request of an amended or supplemented
         Prospectus complying with Section 10(a)(3) of the Act;

                 (d)  To make generally available to its securityholders as
         soon as practicable, but in any event not later than eighteen months
         after the effective date of the Registration Statement (as defined in
         Rule 158(c) under the Act), an earnings statement of the Company and
         its subsidiaries (which need not be audited) complying with Section
         11(a) of the Act and the rules and regulations of the Commission
         thereunder (including at the option of the Company Rule 158);

                 (e)  During the period beginning from the date hereof and
         continuing to and including the date 90 days after the date of the
         Prospectus, the Company will not, and will obtain the agreement of
         each of its executive officers that they will not, offer, sell,
         contract to sell or otherwise dispose of (other than pursuant to stock
         option, other incentive benefit or savings plans existing, or on the
         conversion, exchange or exercise of convertible, exchangeable or
         exercisable securities outstanding, on the date of this Agreement) any
         Stock or securities convertible or exchangeable into or exercisable
         for Stock, without your prior written consent or as described in the
         Prospectus;

                 (f)  To furnish to its stockholders as soon as practicable
         after the end of each fiscal year an annual report (including a
         balance sheet and statements of income, stockholders' equity and cash
         flows of the Company and its consolidated subsidiaries certified by
         independent public accountants) and, as soon as practicable after the
         end of each of the first three quarters of each fiscal year (beginning
         with the fiscal quarter ending after the effective date of the
         Registration Statement), consolidated summary financial information of
         the Company and its subsidiaries for such quarter in reasonable
         detail; and

                 (g)  During a period of three years from the effective date of
         the Registration Statement, to furnish to you copies of all reports or
         other communications (financial or other) furnished to stockholders,
         and deliver to you (i) as soon as they are available, copies of any
         reports and financial statements furnished to or filed with the
         Commission or any national securities exchange on which any class of
         securities of the Company is listed; and (ii) such additional
         information concerning the business and financial condition of the
         Company as you may from time to time reasonably request (such
         financial statements to be on a consolidated basis to the extent the
         accounts of the Company and its subsidiaries are consolidated in
         reports furnished to its stockholders generally or to the Commission).

                 6.  The Company covenants and agrees with the several 
Underwriters that it will pay or cause to be paid the following:  (i) the fees,
disbursements and expenses of the Company's counsel and accountants in
connection with the registration of the Shares under the Act and all other
expenses in connection with the preparation, printing and filing of the
Registration Statement, any Preliminary Prospectus and the Prospectus and
amendments and supplements thereto and the mailing and delivering of copies
thereof to the Underwriters and dealers; (ii) the cost of printing or producing
any Agreement among Underwriters, this Agreement, the International
Underwriting Agreement, the Agreement between Syndicates, any Selling
Agreements, the Blue Sky Memorandum and any other documents in connection with
the offering, purchase, sale and delivery of the Shares; (iii) all expenses in
connection with the qualification of the Shares for offering and sale under
state securities laws as provided in Section 5(b) hereof, including the fees
and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky survey; (iv) the filing fees
incident to securing any required review by the National Association of
Securities Dealers, Inc. of the terms of the sale of the Shares; (v) the cost
of preparing stock certificates; (vi) the cost and charges of any transfer
agent or registrar; (vii) all other costs and expenses incident to the
performance of its obligations hereunder which are not otherwise specifically
provided for in this Section, other than transfer taxes; and (viii) the 
reasonable fees and expenses of Latham & Watkins, counsel to the Selling 
Stockholders.




                                       8
<PAGE>   9

Salomon Brothers Inc agrees to advance any applicable New York State stock
transfer tax, and each Selling Stockholder agrees to reimburse Salomon Brothers
Inc for associated carrying costs in respect of the Shares sold by such Selling
Stockholder if such tax payment is not rebated on the day of payment and for
any portion of such tax payment not rebated.  It is understood, however, that,
except as provided in this Section, Section 8 and Section 11 hereof, the
Underwriters will pay all of their own costs and expenses, including the fees
of their counsel, stock transfer taxes on resale of any of the Shares by them,
and any advertising expenses connected with any offers they may make. It is
further understood that the Underwriters will not be responsible for any costs
or expenses incident to the performance of the Selling Stockholders'
obligations hereunder, including any fees or expenses of counsel for the
Selling Stockholders and, except as provided above in this Section 6, any
expenses or taxes incident to the sale and delivery of the Shares by each
Selling Stockholder to the Underwriters hereunder. The Company and the Selling
Stockholders agree that nothing contained in this Section 6 shall be construed
to modify or supersede such rights and obligations as set forth in the Amended
and Restated Registration Rights Agreement, dated as of September 30, 1987,
among Union Texas Petroleum Holdings, Inc., the predecessor to Allied Signal,
Inc., and the Selling Stockholders and the letter, dated April 20, 1995, from
the Selling Stockholders to the Company.


                 7.  The obligations of each Selling Stockholder hereunder to
sell and deliver Shares at a Time of Delivery shall be subject, in its
discretion, to the conditions set forth in Clauses (a), (c), (e) and (i)
(with respect to, in the case of the condition set forth in clause (i) below,
the obligations of the Company thereunder) below. The obligations of the
Underwriters hereunder, as to the Shares to be delivered at each Time of
Delivery, shall be subject, in their discretion, to the condition that all
representations and warranties and other statements of the Company and of each
Selling Stockholder herein are, at and as of such Time of Delivery, true and
correct, the condition that the Company and each Selling Stockholder shall have
performed all of their respective obligations hereunder theretofore to be
performed, and the following additional conditions:


                 (a)  The Prospectus shall have been filed with the Commission
         pursuant to Rule 424(b) within the applicable time period prescribed
         for such filing by the rules and regulations under the Act and in
         accordance with Section 5(a) hereof; no stop order suspending the
         effectiveness of the Registration Statement or any part thereof shall
         have been issued and no proceeding for that purpose shall have been
         initiated or threatened by the Commission; and all requests for
         additional information on the part of the Commission shall have been
         complied with to your reasonable satisfaction;

                 (b)  Simpson Thacher & Bartlett, counsel for the Underwriters,
         shall have furnished to you such opinion or opinions, dated such Time
         of Delivery, with respect to the incorporation of the Company, the
         validity of the Shares being delivered at such Time of Delivery, the
         Registration Statement, the Prospectus, and other related matters as
         you may reasonably request, and such counsel shall have received such
         papers and information as they may reasonably request to enable them
         to pass upon such matters;

                (c)  Andrews & Kurth L.L.P., counsel for the Company, shall
         have furnished to you and each Selling Stockholder their written
         opinion, dated such Time of Delivery, in form and substance
         satisfactory to you, to the effect that:

                               (i)  The Company has been duly incorporated and
                 is validly existing as a corporation in good standing under
                 the laws of the State of Delaware, with requisite corporate
                 power and authority to own its properties and conduct its
                 business as described in the Prospectus;

                              (ii)  The Company has an authorized
                 capitalization as set forth in the Prospectus, and all of the
                 issued shares of capital stock of the Company (including the
                 Shares being delivered at such Time of Delivery) have been
                 duly and validly authorized and issued and are fully paid and
                 non-assessable; and the Shares conform to the description of
                 the Stock contained in the Prospectus;

                             (iii)  The Company has been duly qualified as a
                 foreign corporation for the transaction of business and is in
                 good standing under the laws of each other jurisdiction





                                       9
<PAGE>   10
                 in which it owns or leases a material amount of properties, or
                 conducts any material business, so as to require such
                 qualification, or is subject to no material liability or
                 disability by reason of failure to be so qualified in any such
                 jurisdiction (such counsel being entitled to rely in respect
                 of matters of fact upon certificates of public officials or
                 officers of the Company, provided that such counsel shall
                 state that they believe that both you and they are justified 
                 in relying upon such certificates);

                               (iv)  Each Material Subsidiary has been duly
                 incorporated and is validly existing as a corporation in good
                 standing under the laws of its jurisdiction of incorporation;
                 to the best of such counsel's knowledge after reasonable
                 investigation, Unimar has been duly formed and is validly
                 existing as a partnership under the laws of the State of
                 Texas; and all of the issued shares of capital stock of each
                 Material Subsidiary have been duly and validly authorized and
                 issued and are fully paid and non-assessable, and (except for
                 directors' qualifying shares and shares held by third parties
                 solely to satisfy local law requirements and except as
                 otherwise set forth in the Prospectus), to the best of such
                 counsel's knowledge after reasonable investigation and except
                 as set forth in a schedule to such counsel's opinion, all of
                 such shares of capital stock and 50% of the equity interests
                 in Unimar are owned directly or indirectly by the Company,
                 free and clear of all liens, encumbrances, equities or claims
                 within the meaning of the Uniform Commercial Code (such
                 counsel being entitled to (A) state that the opinion in this
                 clause relating to the ownership of capital stock and equity
                 interests is based solely on a review of the corporate records
                 of the Company and its subsidiaries and the records of Unimar,
                 the certificate or certificates representing such shares of
                 capital stock and evidence of such equity interests in Unimar
                 and a certificate or certificates in respect of matters of
                 fact as to ownership of and liens, encumbrances, equities or
                 claims on such shares of capital stock and equity interests,
                 provided that such counsel shall state that they believe that
                 both you and they are justified in relying upon such
                 certificate or certificates and (B) rely in respect of matters
                 of fact upon certificates of public officials or officers of
                 the Company or its subsidiaries furnished to you at such Time
                 of Delivery, provided that such counsel shall state that they
                 believe that both you and they are justified in relying upon
                 such certificates);

                               (v)  To the best of such counsel's knowledge
                 after reasonable investigation, other than as set forth in the
                 Prospectus, there is no pending or threatened action, suit or
                 proceeding before any court or any governmental agency or body
                 or any arbitrator involving the Company, any Material
                 Subsidiary or Unimar required to be disclosed in the
                 Registration Statement that is not adequately disclosed
                 therein;

                              (vi)  This Agreement and the International
                 Underwriting Agreement have been duly authorized, executed and
                 delivered by the Company;

                             (vii)  The compliance by the Company with all of
                 the provisions of this Agreement and the International
                 Underwriting Agreement and the consummation of the
                 transactions herein and therein contemplated will not result
                 in any violation of the Restated Certificate of Incorporation
                 or By-laws of the Company and, to the best of such counsel's
                 knowledge after reasonable investigation, such action will not
                 result in a breach or violation of any of the terms or
                 provisions of, or constitute a default under, any indenture,
                 mortgage, deed of trust, loan agreement or other agreement or
                 instrument to which the Company or any of its Material
                 Subsidiaries or, to the best of the Company's knowledge,
                 Unimar is a party or by which the Company or any of its
                 Material Subsidiaries or, to the best of such counsel's
                 knowledge, Unimar is bound or to which any of the property or
                 assets of the Company or any of its Material Subsidiaries or,
                 to the best of such counsel's knowledge, Unimar is subject, or
                 any statute or any order, rule or regulation known to such
                 counsel





                                       10
<PAGE>   11
                 of any court or governmental agency or body having
                 jurisdiction over the Company, any of its Material
                 Subsidiaries or, to the best of such counsel's knowledge,
                 Unimar or any of their properties (excluding breaches,
                 violations and defaults that, individually or in the
                 aggregate, will not have any material adverse effect on the
                 general affairs, management, financial position, stockholders'
                 equity, results of operations or prospects of the Company and
                 its subsidiaries taken as a whole);

                            (viii)  No consent, approval, authorization, order,
                 registration or qualification of or with any such court or
                 governmental agency or body having jurisdiction over the
                 Company is required for the consummation by the Company of the
                 transactions contemplated by this Agreement and the
                 International Underwriting Agreement, except the registration
                 under the Act of the Shares, and such consents, approvals,
                 authorizations, registrations or qualifications as may be
                 required under state or foreign securities or Blue Sky laws in
                 connection with the purchase and distribution of the Shares by
                 the Underwriters and the International Underwriters;

                              (ix)  The statements made in the Prospectus under
                 the captions "Description of Capital Stock" and "Certain
                 United States Tax Consequences to Non-U.S. Holders", insofar
                 as such statements constitute summaries of the legal matters
                 and documents referred to therein, fairly present the
                 information called for with respect to such legal matters and
                 documents and fairly summarize such legal matters and
                 documents;

                               (x)  The documents incorporated by reference in
                 the Prospectus or any further amendment or supplement thereto
                 made by the Company prior to such Time of Delivery (other than
                 the financial statements and related schedules and engineering
                 and statistical data therein, as to which such counsel need
                 express no opinion), when they became effective or were filed
                 with the Commission, as the case may be, complied as to form
                 in all material respects with the requirements of the Act or
                 the Exchange Act, as applicable, and the published rules and
                 regulations of the Commission thereunder; and

                              (xi)  The Registration Statement and the
                 Prospectus and any further amendments and supplements thereto
                 made by the Company prior to such Time of Delivery (other than
                 the financial statements and related schedules and engineering
                 and statistical data therein, as to which such counsel need
                 express no opinion) comply as to form in all material respects
                 with the requirements of the Act and the published rules and
                 regulations of the Commission thereunder.

                 Such counsel shall state that, although they do not assume any
         responsibility for the accuracy, completeness or fairness of the
         statements contained in any of the documents referred to in subclause
         (x) of this Clause (c) or in the Registration Statement or the
         Prospectus (except as and to the extent described in subclause (ix) of
         this Clause (c)), they have no reason to believe that (i) any of the
         documents referred to in subclause (x) of this Clause (c) when such
         documents became effective or were so filed, as the case may be,
         contained, in the case of a registration statement which became
         effective under the Act, an untrue statement of a material fact, or
         omitted to state a material fact required to be stated therein or
         necessary to make the statements therein not misleading, or, in the
         case of other documents which were filed under the Exchange Act with
         the Commission, an untrue statement of a material fact, or omitted to
         state a material fact required to be stated therein or necessary in
         order to make the statements therein, in the light of the 
         circumstances under which they were made when such documents were so 
         filed, not misleading; or (ii) as of its effective date, the
         Registration Statement





                                       11
<PAGE>   12
         or any further amendment thereto made by the Company prior to such
         Time of Delivery (other than the financial statements and related
         schedules therein, as to which such counsel need express no opinion or
         belief) contained an untrue statement of a material fact or omitted to
         state a material fact required to be stated therein or necessary to
         make the statements therein not misleading or that, as of its date,
         the Prospectus or any further amendment or supplement thereto made by
         the Company prior to such Time of Delivery (other than the financial
         statements and related schedules therein, as to which such counsel
         need express no opinion or belief) contained an untrue statement of a
         material fact or omitted to state a material fact necessary to make
         the statements therein, in the light of the circumstances under which
         they were made, not misleading or that, as of such Time of Delivery,
         either the Registration Statement or the Prospectus or any further
         amendment or supplement thereto made by the Company prior to such Time
         of Delivery (other than the financial statements and related schedules
         therein, as to which such counsel need express no opinion or belief)
         contains an untrue statement of a material fact or omits to state a
         material fact necessary to make the statements therein, in the light
         of the circumstances under which they were made, not misleading; and
         they do not know of any amendment to the Registration Statement
         required to be filed or of any contracts or other documents of a
         character required to be filed as an exhibit to the Registration
         Statement or required to be incorporated by reference into the
         Prospectus or required to be described in the Registration Statement
         or the Prospectus which are not filed or incorporated by reference or
         described as required.

                 In rendering the opinions referred to in subclauses (ii)
         (other than with respect to authorized capitalization), (iii), (iv),
         (v), (vii) and (viii) of this Clause (c), such counsel may rely upon
         an opinion of Newton W. Wilson, III, Esq., General Counsel, Vice
         President-Administration and Secretary of the Company, furnished to
         you at such Time of Delivery, provided that such counsel shall state
         that they believe that both you and they are justified in relying upon
         such opinion.

                 In rendering such opinion, such counsel may state that
         they express no opinion as to the laws of any jurisdiction other than
         the Federal laws of the United States, the laws of the State of New 
         York and the State of Texas and the General Corporation Law of the 
         State of Delaware.

                 (d)  Latham & Watkins, counsel for each of the Selling
         Stockholders, shall have furnished to you their written opinion, dated
         such Time of Delivery, in form and substance satisfactory to you, to
         the effect that:

                               (i)  Each Selling Stockholder has been duly
                 formed and is validly existing as a partnership under the laws
                 of the State of Delaware; this Agreement and the International
                 Underwriting Agreement have been duly executed and delivered
                 by each Selling Stockholder; and the sale of the Shares
                 hereunder and thereunder and the compliance by each Selling
                 Stockholder with all of the provisions of this Agreement and
                 the International Underwriting Agreement and the consummation
                 of the transactions herein and therein contemplated will not
                 result in any violation of the respective Partnership
                 Agreement or other constituent documents, if any, relating to
                 each Selling Stockholder nor will such action result in a
                 breach or violation of any terms or provisions of, or
                 constitute a default under, any statute, any indenture,
                 mortgage, deed of trust, loan agreement or other agreement or
                 instrument known to such counsel to which either Selling
                 Stockholder is a party or by which either Selling Stockholder
                 is bound or to which any of the property or assets of either
                 Selling Stockholder is subject, or any order, rule or
                 regulation known to such counsel of any court or governmental
                 agency or body having jurisdiction over either Selling
                 Stockholder or the property of either Selling Stockholder
                 (excluding breaches, violations and defaults that,
                 individually or in the aggregate, will not materially
                 adversely affect such Selling Stockholder's ability to perform
                 its obligations under this Agreement or the International
                 Underwriting Agreement);





                                       12
<PAGE>   13
                              (ii)  No consent, approval, authorization or
                 order of any court or governmental agency or body is required
                 for the consummation of the transactions contemplated by this
                 Agreement and the International Underwriting Agreement in
                 connection with the sale of the Shares hereunder and under the
                 International Underwriting Agreement except such as have been
                 obtained under the Act and such as may be required under state
                 or foreign securities or Blue Sky laws in connection with the
                 purchase and distribution of such Shares by the Underwriters
                 and the International Underwriters;

                             (iii)  Immediately prior to such Time of Delivery
                 each Selling Stockholder had good and valid title to the
                 Shares to be sold at such Time of Delivery by such Selling
                 Stockholder under this Agreement and the International
                 Underwriting Agreement, free and clear of all liens,
                 encumbrances, equities or adverse claims, within the meaning 
                 of the Uniform Commercial Code (such counsel being entitled 
                 to state that the opinion in this clause is based solely on a 
                 review of the partnership records of such Selling Stockholder,
                 the certificate or certificates representing such Shares and a
                 certificate in respect of matters of fact as to ownership of
                 and liens, encumbrances, equities or claims on the Shares,
                 provided that such counsel shall state that they believe that
                 both you and they are justified in relying upon such
                 certificate or certificates) and full right, power and
                 authority to sell, assign, transfer and deliver the Shares
                 hereunder and thereunder; and

                              (iv)  Assuming that each of the several
                 Underwriters purchasing Shares to be sold pursuant to this
                 Agreement and the International Underwriting Agreement have
                 purchased such Shares in good faith and without notice of any
                 lien, encumbrance, equity or any other adverse claim within
                 the meaning of the Uniform Commercial Code, the delivery of
                 certificates for the Shares pursuant to this Agreement and the
                 International Underwriting Agreement will pass valid and
                 marketable title to such Shares to each of the several
                 Underwriters who have purchased such Shares, free and clear of
                 all liens, encumbrances, equities or adverse claims within the
                 meaning of the Uniform Commercial Code.

                 In rendering such opinion, such counsel may state that they
         express no opinion as to the laws of any jurisdiction other than the
         Federal laws of the United States, the laws of the State of New York
         and the General Corporation Law of the State of Delaware.

                 (e)  On the effective date of the Registration Statement and
         the effective date of the most recently filed post-effective
         amendment to the Registration Statement and also at each Time of
         Delivery, Price Waterhouse shall have furnished to you a letter or
         letters, dated the respective date of delivery thereof, in form and
         substance satisfactory to you, to the effect set forth in Annex I
         hereto;

                 (f) (i) None of the Company or any of its subsidiaries or
         Unimar shall have sustained since the date of the latest audited
         financial statements included or incorporated by reference in the
         Prospectus any loss or interference with its business from fire,
         explosion, flood or other calamity, whether or not covered by
         insurance, or from any labor dispute or court or governmental action,
         order or decree, otherwise than as set forth or contemplated in the
         Prospectus, which loss or interference is material to the Company and
         its subsidiaries taken as a whole, and (ii) since the respective dates
         as of which information is given in the Prospectus there shall not
         have been any change in the capital stock (other than (i) any shares
         of capital stock of the Company sold upon the exercise of a
         subscription, option or warrant or the conversion of a security
         outstanding on the date of this Agreement, (ii) any shares of such
         capital stock, or other securities convertible or exercisable or
         exchangeable for such shares, in either case issued pursuant to any
         employee stock option or benefit plan of the Company existing on the
         date of this Agreement and (iii) stock repurchases in accordance with
         the Company's publicly announced stock repurchase program) or any
         increase of more than $35,000,000 in the consolidated short-term or
         long-term debt of the Company or any change, or any development
         involving a prospective change, in or affecting the general affairs,
         management, financial position, stockholders' equity or results of
         operations of the Company and




                                       13
<PAGE>   14
         its subsidiaries taken as a whole, otherwise than as set forth or
         contemplated in the Prospectus, the effect of which, in any such case
         described in Clause (i) or (ii), is in your judgment so material and
         adverse as to make it impracticable or inadvisable to proceed with the
         public offering or the delivery of the Shares being delivered at such
         Time of Delivery on the terms and in the manner contemplated in the
         Prospectus;

                 (g)  On or after the date hereof (i) no downgrading shall have
         occurred in the rating accorded the Company's debt securities by any 
         "nationally recognized statistical rating organization," as that term
         is defined by the Commission for purposes of Rule 436(g)(2) under the
         Act and (ii) no such organization shall have publicly announced
         that it has under surveillance or review, with possible negative
         implications, its rating of any of the Company's debt securities
         (other than Standard & Poor's Corporation's "negative outlook" on its
         rating of the Company's debt securities, which outlook was publicly
         announced prior to the date hereof);

                 (h)  On or after the date hereof there shall not have occurred
         any of the following:  (i) a suspension or material limitation in
         trading in securities generally on the New York Stock Exchange; (ii) a
         general moratorium on commercial banking activities in New York
         declared by either Federal or New York State authorities; or (iii) the
         outbreak or escalation of hostilities involving the United States or
         the declaration by the United States of a national emergency or war if
         the effect of any such event specified in this Clause (iii) in your
         judgment makes it impracticable or inadvisable to proceed with the
         public offering or the delivery of the Shares being delivered at such
         Time of Delivery on the terms and in the manner contemplated in the
         Prospectus; and

                 (i)  The Company and each Selling Stockholder shall have
         furnished or caused to be furnished to you at such Time of Delivery
         certificates of the Company (executed by appropriate officers of the
         Company) and of such Selling Stockholder, respectively, satisfactory
         to you as to the accuracy of the representations and warranties of the
         Company and such Selling Stockholder, respectively, herein at and as
         of such Time of Delivery, as to the performance by the Company and
         such Selling Stockholder of all of their respective obligations
         hereunder to be performed at or prior to such Time of Delivery, and as
         to such other matters as you may reasonably request, and the Company
         shall have furnished or caused to be furnished certificates as to the
         matters set forth in subsections (a) and (f) of this Section, and as
         to such other matters as you may reasonably request.

                 8.  (a)  The Company will indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and will reimburse
each Underwriter for any legal or other expenses reasonably incurred by such
Underwriter in connection with investigating or defending any such action or
claim as such expenses are incurred; provided, however, that the Company shall
not be liable in any such case to the extent that any such loss, claim, damage
or liability arises out of or is based upon an untrue statement or alleged
untrue statement or omission or alleged omission made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by any Underwriter through you expressly for use
therein or by either Selling Stockholder expressly for use therein; and
provided, further, that the Company shall not be liable to any Underwriter
under the indemnity agreement in this subsection (a) with respect to any
Preliminary Prospectus to the extent that any such loss, claim, damage or
liability of such Underwriter results from the fact that such Underwriter sold
Shares to a person as to whom it shall be established that there was not sent
or given, at or prior to the written confirmation of such sale, a copy of the
Prospectus (excluding documents incorporated by reference) or of the Prospectus
as then amended or supplemented (excluding documents incorporated by reference)
in any case where such delivery is required by the Act if the Company has
previously furnished copies thereof to such Underwriter and the loss, claim,
damage





                                       14
<PAGE>   15
or liability of such Underwriter results from an untrue statement or omission
of a material fact contained in the Preliminary Prospectus which was corrected
in the Prospectus (excluding documents incorporated by reference) or in the
Prospectus as then amended or supplemented (excluding documents incorporated by
reference).

                 (b)  Each Selling Stockholder (subject to the limitation on
indemnity set forth in subsection (g)) will indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statement therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished by such Selling Stockholder to the Company, or to an Underwriter
through you, expressly for use therein; and will reimburse each Underwriter for
any legal or other expenses reasonably incurred by such Underwriter in
connection with investigating or defending any such action or claim as such
expenses are incurred; provided that such Selling Stockholder shall not be
liable to any Underwriter under the indemnity agreement in this subsection (b)
with respect to any Preliminary Prospectus to the extent that any such loss,
claim, damage or liability of such Underwriter results from the fact that such
Underwriter sold Shares to a person as to whom it shall be established that
there was not sent or given, at or prior to the written confirmation of such
sale, a copy of the Prospectus (excluding documents incorporated by reference)
or of the Prospectus as then amended or supplemented (excluding documents
incorporated by reference) in any case where such delivery is required by the
Act if the Company has previously furnished copies thereof to such Underwriter
and the loss, claim, damage or liability of such Underwriter results from an
untrue statement or omission of a material fact contained in the Preliminary
Prospectus which was corrected in the Prospectus (excluding documents
incorporated by reference) or in the Prospectus as then amended or supplemented
(excluding documents incorporated by reference).

                 (c)  Each Underwriter will indemnify and hold harmless the
Company and each Selling Stockholder against any losses, claims, damages or
liabilities to which the Company or such Selling Stockholder may become
subject, under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in
any Preliminary Prospectus, the Registration Statement or the Prospectus, or
any amendment or supplement thereto, or arise out of or are based upon the
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading, in
each case to the extent, but only to the extent, that such untrue statement or
alleged untrue statement or omission or alleged omission was made in any
Preliminary Prospectus, the Registration Statement or the Prospectus or any
such amendment or supplement in reliance upon and in conformity with written
information furnished to the Company by such Underwriter through you expressly
for use therein; and will reimburse the Company and such Selling Stockholder
for any legal or other expenses reasonably incurred by the Company or such
Selling Stockholder in connection with investigating or defending any such
action or claim as such expenses are incurred.

                 (d)  Promptly after receipt by a party entitled to
indemnification under subsection (a), (b) or (c) above (the "indemnified
party") of notice of the commencement of any action, such indemnified party
shall, if a claim in respect thereof is to be made against a party required to
provide indemnification to such indemnified party under such subsection (the
"indemnifying party"), notify the indemnifying party in writing of the
commencement thereof; but the omission so to notify the indemnifying party
shall not relieve it from any liability which it may have to any indemnified
party otherwise than under such subsection.  In case any such action shall be
brought against any indemnified party and it shall notify the indemnifying
party of the commencement thereof, the indemnifying party shall be entitled to
participate therein and, to the extent that it shall wish, jointly with any
other indemnifying party similarly notified, to assume the defense thereof,
with





                                       15
<PAGE>   16
counsel satisfactory to such indemnified party (which shall not, except with
the consent of the indemnified party, be counsel to the indemnifying party),
and, after notice from the indemnifying party to such indemnified party of its
election so to assume the defense thereof, the indemnifying party shall not be
liable to such indemnified party under such subsection for any legal expenses
of other counsel or any other expenses, in each case subsequently incurred by
such indemnified party, in connection with the defense thereof other than
reasonable costs of investigation.  In no event shall an indemnifying party be
liable for the fees and expenses of more than one counsel (in addition to any
local counsel), apart from counsel to such indemnifying party, for all
indemnified parties in connection with any one action or separate but similar
or related actions arising out of the same general allegations or
circumstances.  No indemnifying party shall be liable for any settlement of any
such action effected without its consent, provided that such consent is not
unreasonably withheld or delayed.

                 (e)  If the indemnification provided for in this Section 8 is

unavailable to or insufficient to hold harmless an indemnified party under
subsection (a), (b) or (c) above in respect of any losses, claims, damages or
liabilities (or actions in respect thereof) referred to therein, then each
indemnifying party shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities
(or actions in respect thereof) in such proportion as is appropriate to reflect
the relative benefits received by the Company and the Selling Stockholders on
the one hand and the Underwriters on the other from the offering of the Shares.
If, however, the allocation provided by the immediately preceding sentence is
not permitted by applicable law or if the indemnified party failed to give the
notice required under subsection (d) above, then each indemnifying party shall
contribute to such amount paid or payable by such indemnified party in such
proportion as is appropriate to reflect not only such relative benefits but
also the relative fault of the Company and the Selling Stockholders on the one
hand and the Underwriters on the other in connection with the statements or
omissions which resulted in such losses, claims, damages or liabilities (or
actions in respect thereof), as well as any other relevant equitable
considerations.  The relative benefits received by the Company and the Selling
Stockholders on the one hand and the Underwriters on the other shall be deemed
to be in the same proportion as the total net proceeds from the offering of the
Shares purchased under this Agreement (before deducting expenses) received by
the Company and the Selling Stockholders on the one hand bear to the total
underwriting discounts and commissions received by the Underwriters on the
other with respect to the Shares purchased under this Agreement, in each case
as set forth in the table on the cover page of the Prospectus.  The relative
fault shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
the Company or either Selling Stockholder on the one hand or the Underwriters
on the other and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.  The Company,
the Selling Stockholders and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (e) were determined
by pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (e).  The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to
above in this subsection (e) shall be deemed to include any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim.  Notwithstanding the
provisions of this subsection (e), (i) no Underwriter shall be required to
contribute any amount in excess of the amount by which the total price at which
the Shares underwritten by it and distributed to the public were offered to the
public exceeds the amount of any damages which such Underwriter has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission and (ii) neither Selling Stockholder shall be
required to contribute any amount in excess of the amount by which proceeds
received by such Selling Stockholder from the Shares sold by it pursuant to
this Agreement exceeds that amount of any damages which such Selling
Stockholder has otherwise paid or become liable to pay by reason of any untrue
statement or alleged untrue statement or omission or alleged omission.  No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation.  The Underwriters' obligations in
this subsection (e) to contribute are several in proportion to their respective
underwriting  obligations and not joint.

                 (f)  The obligations of the Company and each Selling
Stockholder under this Section 8 shall be in addition to any liability which
the Company and such Selling Stockholder may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any





                                       16
<PAGE>   17
Underwriter within the meaning of the Act; and the obligations of the
Underwriters under this Section 8 shall be in addition to any liability which
the respective Underwriters may otherwise have and shall extend, upon the same
terms and conditions, to each officer and director of the Company and to each
partner of each Selling Stockholder and to each person, if any, who controls
the Company and each Selling Stockholder within the meaning of the Act.

                 (g)  Notwithstanding the foregoing, in no event shall either
Selling Stockholder be required to pay an amount in indemnification and
contribution under subsection (b) above in excess of the total proceeds 
received by such Selling Stockholder from the Shares sold by it pursuant to 
this Agreement.


                 (h)  With respect to rights and obligations of the Company and
the Selling Stockholders vis a vis each other, nothing in this Section 8 shall
be construed to modify or supersede such rights and obligations as set forth in
the Amended and Restated Registration Rights Agreement dated as of September
30, 1987 among the Company, the predecessor to Allied Signal, Inc. and the
Selling Stockholders and the letter dated April 20, 1995 from the Selling
Stockholders to the Company.


                 9.  (a)  If any Underwriter shall default in its obligation to
purchase the Shares which it has agreed to purchase hereunder at a Time of
Delivery, you may in your discretion arrange for you or another party or other
parties to purchase such Shares on the terms contained herein.  If within
thirty-six hours after such default by any Underwriter you do not arrange for
the purchase of such Shares, then the Selling Stockholders shall be entitled to
a further period of thirty-six hours within which to procure another party or
other parties satisfactory to you to purchase such Shares on such terms.  In
the event that, within the respective prescribed periods, you notify the
Selling Stockholders that you have so arranged for the purchase of such Shares,
or the Selling Stockholders notify you that they have so arranged for the
purchase of such Shares, you or the Selling Stockholders shall have the right
to postpone such Time of Delivery for a period of not more than seven days, in
order to effect whatever changes may thereby be made necessary in the
Registration Statement or the Prospectus, or in any other documents or
arrangements, and the Company agrees to file promptly any amendments to the
Registration Statement or the Prospectus which in your opinion and the opinion
of the Company may thereby be made necessary.  The term "Underwriter" as used
in this Agreement shall include any person substituted under this Section 9 with
like effect as if such person had originally been a party to this Agreement
with respect to such Shares.

                 (b)  If, after giving effect to any arrangements for the
purchase of the Shares of a defaulting Underwriter or Underwriters by you and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased does not exceed one-eleventh of
the aggregate number of all the Shares to be purchased at such Time of
Delivery, then the Selling Stockholders shall have the right to require each
non-defaulting Underwriter to purchase the number of Shares which such
Underwriter agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

                 (c)  If, after giving effect to any arrangements for the
purchase of the Shares of a defaulting Underwriter or Underwriters by you and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased exceeds one-eleventh of the
aggregate number of all the Shares to be purchased at such Time of Delivery, or
if the Selling Stockholders shall not exercise the right described in
subsection (b) above to require non-defaulting Underwriters to purchase Shares
of a defaulting Underwriter or Underwriters, then this Agreement (or, with
respect to the Second Time of Delivery, the obligations of the Underwriters to
purchase and of the Selling Stockholders to sell the Optional Shares) shall
thereupon terminate, without liability on the part of any non-defaulting
Underwriter or the Company or the Selling Stockholders, except for the expenses
to be borne by the Company, the Selling Stockholders and the Underwriters as
provided in Section 6 hereof and the





                                       17
<PAGE>   18
indemnity and contribution agreements in Section 8 hereof; but nothing herein
shall relieve a defaulting Underwriter from liability for its default.

                 10.  The respective indemnities, agreements, representations,
warranties and other statements of the Company, each Selling Stockholder and
the several Underwriters, as set forth in this Agreement or made by or on
behalf of them, respectively, pursuant to this Agreement, shall remain in full
force and effect, regardless of any investigation (or any statement as to the
results thereof) made by or on behalf of any Underwriter or any controlling
person of any Underwriter, or the Company or the Selling Stockholders, or any
officer or director or controlling person of the Company or the Selling
Stockholders, and shall survive delivery of and payment for the Shares.

                 11.  If this Agreement shall be terminated pursuant to Section
9 hereof, neither the Company nor the Selling Stockholders shall then be under
any liability to any Underwriter except as provided in Section 6 and Section 8
hereof; but, if for any other reason any Shares are not delivered by or on
behalf of either Selling Stockholder as provided herein, the Company will 
reimburse the Underwriters through you for all of their out-of-pocket
expenses approved in writing by you, including fees and disbursements of
counsel, reasonably incurred by the Underwriters in making preparations for the
purchase, sale and delivery of the Shares not so delivered, but the Company and
the Selling Stockholders shall then be under no further liability to any
Underwriter in respect of the Shares not so delivered except as provided in
Section 6 and Section 8 hereof.

                 12.  In all dealings hereunder, you shall act on behalf of
each of the Underwriters, and the parties hereto shall be entitled to act and
rely upon any statement, request, notice or agreement on behalf of any
Underwriter made or given by you.

                 All statements, requests, notices and agreements hereunder
shall be in writing, and if to the Underwriters shall be delivered or sent by
mail, telex or facsimile transmission to you as the representatives at Seven
World Trade Center, New York, N.Y.  10048, Attention:  Registration Department;
if to either Selling Stockholder shall be delivered or sent by mail, telex or
facsimile transmission to such Selling Stockholder at _____________, Attention:
______________; and if to the Company shall be delivered or sent by mail, telex
or facsimile transmission to the address of the Company set forth in the
Registration Statement, Attention: Secretary; provided, however, that any
notice to an Underwriter pursuant to Section 8(d) hereof shall be delivered or
sent by mail, telex or facsimile transmission to such Underwriter at its
address set forth in its Underwriters' Questionnaire or telex constituting such
Questionnaire, which address will be supplied to the Company or either Selling
Stockholder by you upon request.  Any such statements, requests, notices or
agreements shall take effect upon receipt thereof.

                 13.  This Agreement shall be binding upon, and inure solely to
the benefit of, the Underwriters, the Company and the Selling Stockholders and,
to the extent provided in Sections 8 and 10 hereof, the officers and directors
of the Company and the partners of either Selling Stockholder and each person 
who controls the Company, either Selling Stockholder or any Underwriter, and 
their respective heirs, executors, administrators, successors and assigns, 
and no other person shall acquire or have any right under or by virtue of this 
Agreement.  No purchaser of any of the Shares from any Underwriter shall be 
deemed a successor or assign by reason merely of such purchase.

                 14.  No partner of either Selling Stockholder or any successor
general partner of such Selling Stockholder shall have any personal liability
for the performance of any of such Selling Stockholder's obligations hereunder,
and any liability or obligation of such Selling Stockholder arising hereunder
shall be limited to and satisfied only out of the property of such Selling
Stockholder.

                 15.  Time shall be of the essence of this Agreement.  As used
herein, the term "business day" shall mean any day when the Commission's office
in Washington, D.C. is open for business.

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





                                       18
<PAGE>   19
                 17.  This Agreement may be executed by any one or more of the
parties hereto in any number of counterparts, each of which shall be deemed to
be an original, but all such counterparts shall together constitute one and the
same instrument.





                                       19
<PAGE>   20
                 If the foregoing is in accordance with your understanding,
please sign and return to us nine counterparts hereof, and upon the acceptance
hereof by you, on behalf of each of the Underwriters, this letter and such
acceptance hereof shall constitute a binding agreement among each of the
Underwriters, the Company and the Selling Stockholders.

                          Very truly yours,

                          UNION TEXAS PETROLEUM
                            HOLDINGS, INC.


                          By:___________________________________________________
                             ___________________________________________________
                             Name: 
                             Title:


                          PETROLEUM ASSOCIATES, L.P.


                          By:___________________________________________________
                             ___________________________________________________
                             Name: 
                             Title:

                          KKR PARTNERS II, L.P.


                          By:___________________________________________________
                             ___________________________________________________
                             Name:
                             Title:





                                       20
<PAGE>   21
Accepted as of the date hereof
at New York, New York:

SALOMON BROTHERS INC
CS FIRST BOSTON CORPORATION
GOLDMAN, SACHS & CO.
MERRILL LYNCH, PIERCE, FENNER & SMITH
             INCORPORATED            



By: SALOMON BROTHERS INC


By:_____________________________________
    Name:
    Title:

For themselves and the other several 
Underwriters named in Schedule I to 
the foregoing Agreement.





                                       21
<PAGE>   22
                                   SCHEDULE I


<TABLE>
<CAPTION>
                                                                                                Number of
                                                                                             Optional Shares
                                                               Total Number                  to be Purchased
                                                              of Firm Shares                   if Maximum
          Underwriter                                         to be Purchased                Option Exercised
          -----------                                         ---------------                ----------------
<S>                                                           <C>                            <C>
Salomon Brothers Inc  . . . . . . . . . . . . . . . .
CS First Boston Corporation   . . . . . . . . . . . .
Goldman, Sachs & Co.  . . . . . . . . . . . . . . . .
Merrill Lynch, Pierce, Fenner & Smith . . . . . . . .
             Incorporated . . . . . . . . . . . . . .











           Total  . . . . . . . . . . . . . . . . . .         8,000,000                      1,200,000
                                                          =================================================

</TABLE>



<PAGE>   23



                                  SCHEDULE II



<TABLE>
<CAPTION>
                                                                                                 Number of
                                                                                                 Optional Shares
                                                                  Total Number                   to be Sold
                                                                  of Firm Shares                 if Maximum
SELLING STOCKHOLDER                                               to be Sold                     Option Exercised
- -------------------                                               --------------                 ----------------
<S>                                                               <C>                            <C>
Petroleum Associates, L.P.  . . . . . . . . . . . . .
KKR Partners II, L.P.   . . . . . . . . . . . . . . .


</TABLE>



                                       1
<PAGE>   24
                                                                         ANNEX I



               Pursuant to Section 7(e) of the Underwriting Agreement, the
accountants shall furnish letters to the Underwriters to the effect that:

            (i)  They are independent certified public accountants with respect
to the Company and its subsidiaries within the meaning of the Act and the
applicable published rules and regulations thereunder;

           (ii)  In their opinion, the financial statements and financial
statement schedules provided pursuant to Article 12 of Regulation S-X audited
by them and incorporated by reference in the Registration Statement or the
Prospectus comply as to form in all material respects with the applicable
accounting requirements of the Act or the Exchange Act, as applicable, and the
applicable related published rules and regulations thereunder with respect to
Registration Statements on Form S-3; and they have made a review in accordance
with standards established by the American Institute of Certified Public
Accountants of the consolidated interim financial statements for the periods
specified in such letter, as indicated in their reports thereon, copies of
which have been furnished to the representatives of the Underwriters (the
"Representatives");

          (iii)  On the basis of limited procedures, not constituting an audit
in accordance with generally accepted auditing standards, consisting of a
reading of the unaudited financial statements referred to below, a reading of
the latest available interim financial data of the Company and its
subsidiaries, a reading of the minute books of the Company and its subsidiaries
since the date of the latest audited financial statements included or
incorporated by reference in the Prospectus, inquiries of officials of the
Company and its subsidiaries responsible for financial and accounting matters
regarding the specified items for which representations are requested below,
nothing came to their attention as a result of the foregoing procedures that
caused them to believe that:

               (A)  the unaudited condensed consolidated statements of
      operations, consolidated balance sheets and consolidated statements of
      cash flows included in the Company's Quarterly Reports on Form 10-Q
      incorporated by reference in the Prospectus do not comply as to form in
      all material respects with the applicable accounting requirements of the
      Exchange Act as it applies to Form 10-Q and the related published rules
      and regulations thereunder or are not in conformity with generally
      accepted accounting principles, when read in conjunction with the audited
      financial statements and notes thereto incorporated by reference in the
      Registration Statement, applied on a basis substantially consistent with
      the basis for the audited consolidated statements of operations,
      consolidated balance sheets and consolidated statements of cash flows
      included in the Company's Annual Report on Form 10-K for the most recent
      fiscal year;

               (B)  at the date of the latest available interim financial data
      and at a specified date not more than five days prior to the date of such
      letter, there have been any changes in the consolidated capital stock
      (other than issuances of capital stock upon exercise of options and stock
      appreciation rights, upon earn-outs of performance shares and upon
      conversions of convertible securities, in each case which were
      outstanding on the date of the latest balance sheet included or
      incorporated by reference in the Prospectus) or any increase in the
      consolidated short-term or long-term debt of the Company and its
      subsidiaries, or any decreases in consolidated net current assets
      (working capital) or stockholders' equity or other items heretofore
      determined with the Representatives, or any increases in any items
      heretofore determined with the Representatives, in each case as compared
      with amounts shown in the latest balance sheet included or incorporated
      by reference in the Prospectus, except in each case for changes,
      increases or decreases which the Prospectus discloses have occurred or
      may occur or which are described in such letter; and

               (C)  for the period from the date of the latest financial
      statements included or incorporated by reference in the Prospectus to the
      specified date referred to in Clause (B) there were any decreases in
      consolidated net revenues or operating profit or the total or per share
      amounts of consolidated net income or other items heretofore determined
      with the Representatives, or any increases in any items heretofore
      determined with the Representatives, in each case as compared with the
      comparable period of the preceding year, except in each case for
      increases or decreases which the Prospectus discloses have occurred or
      may occur or which are described in such letter; and





<PAGE>   25
           (iv)  In addition to the audit referred to in their report(s)
included or incorporated by reference in the Prospectus and the limited
procedures, inspection of minute books, inquiries and other procedures referred
to in paragraphs (ii) and (iii) above, they have carried out certain specified
procedures, not constituting an audit in accordance with generally accepted
auditing standards, with respect to certain amounts, percentages and financial
information specified by the Representatives which are derived from the general
accounting records of the Company and its subsidiaries, which appear in the
Prospectus (excluding documents incorporated by reference) or in Part II of, or
in exhibits and schedules to, the Registration Statement specified by the
Representatives or in documents incorporated by reference in the Prospectus
specified by the Representatives, and have compared certain of such amounts,
percentages and financial information with the accounting records of the
Company and its subsidiaries and have found them to be in agreement.





                                       2
<PAGE>   26
                                                                        ANNEX II


                             MATERIAL SUBSIDIARIES


Union Texas Petroleum Energy Corporation
Union Texas International Corporation
Union Texas East Kalimantan Limited
Union Texas Pakistan, Inc.
Union Texas Petroleum Limited
Unistar, Inc.
Union Texas Britannia Limited
Union Texas Finance, Inc.




<PAGE>   1



                                                                   EXHIBIT 1.2



                      UNION TEXAS PETROLEUM HOLDINGS, INC.

                                  COMMON STOCK
                           (PAR VALUE $.05 PER SHARE)

                                ________________

                             Underwriting Agreement
                            (International Version)  

                                                              ______ __, 199_

SALOMON BROTHERS INTERNATIONAL LIMITED
CS FIRST BOSTON LIMITED
GOLDMAN SACHS INTERNATIONAL
MERRILL LYNCH INTERNATIONAL LIMITED
  As representatives of the
  several Underwriters named
  in Schedule I hereto
c/o SALOMON BROTHERS INTERNATIONAL LIMITED
Seven World Trade Center
New York, New York  10048

Dear Sirs:

                 Petroleum Associates, L.P. and KKR Partners II, L.P.
(together, the "Selling Stockholders"), propose, subject to the terms and
conditions stated herein, to sell to the Underwriters named in Schedule I
hereto (the "Underwriters") an aggregate of 2,000,000 shares (the "Firm
Shares") and, at the election of the Underwriters, up to 300,000 additional
shares (the "Optional Shares") of Common Stock, par value $.05 per share (the
"Stock"), of Union Texas Petroleum Holdings, Inc., a Delaware corporation (the
"Company"). The Firm Shares and the Optional Shares which the Underwriters
elect to purchase pursuant to Section 2 hereof are collectively referred to
herein as the "Shares".

                 It is understood and agreed to by all parties that the Company
and the Selling Stockholders are concurrently entering into an agreement, a
copy of which is attached hereto (the "U.S. Underwriting Agreement"), providing
for the sale by the Selling Stockholders of up to a total of 9,200,000 shares
of Stock (the "U.S. Shares"), including the over-allotment option thereunder,
through arrangements with certain underwriters in the United States (the "U.S.
Underwriters"), for whom Salomon Brothers Inc, CS First Boston Corporation,
Goldman, Sachs & Co. and Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner &
Smith Incorporated are acting as representatives.  Anything herein or therein
to the contrary notwithstanding, the respective closings under this Agreement
and the U.S. Underwriting Agreement are hereby expressly made conditional on
one another.  The Underwriters hereunder and the U.S. Underwriters are
simultaneously entering into an Agreement between U.S. and International
Underwriting Syndicates (the "Agreement between Syndicates") which provides,
among other things, for the transfer of shares of Stock between the two
syndicates and for consultation by the representatives hereunder with Salomon
Brothers Inc prior to exercising the rights of the Underwriters under Section 7
hereof.  Two forms of prospectus are to be used in connection with the offering
and sale of shares of Stock contemplated by the foregoing, one relating to the
Shares hereunder and the other relating to the U.S. Shares.  The latter form of
prospectus will be identical to the former except for certain substitute pages
<PAGE>   2
as included in the registration statement and amendments thereto as mentioned
below.  Except as used in Sections 2, 3, 4, 9 and 11 herein, and except as the
context may otherwise require, references hereinafter to the Shares shall
include all the shares of Stock which may be sold pursuant to either this
Agreement or the U.S. Underwriting Agreement, and references herein to any
prospectus whether in preliminary or final form, and whether as amended or
supplemented, shall include both the U.S. and the international versions
thereof.

                 In addition, this Agreement incorporates by reference certain
provisions from the U.S. Underwriting Agreement (including the related
definitions of terms, which are also used elsewhere herein) and, for purposes
of applying the same, references (whether in these precise words or their
equivalent) in the incorporated provisions to the "Underwriters" shall be to
the Underwriters hereunder, to the "Shares" shall be to the Shares hereunder as
just defined, to "this Agreement" (meaning therein the U.S. Underwriting
Agreement) shall be to this Agreement (except where this Agreement is already
referred to or as the context may otherwise require) and to the representatives
of the Underwriters or to Salomon Brothers Inc shall be to the addressees of
this Agreement and to Salomon Brothers International Limited ("SBIL"), and, in
general, all such provisions and defined terms shall be applied mutatis
mutandis as if the incorporated provisions were set forth in full herein having
regard to their context in this Agreement as opposed to the U.S. Underwriting
Agreement.
 
                 1.  The Company hereby makes to the Underwriters, and each
Selling Stockholder hereby makes to the Underwriters and the Company, the same
respective representations, warranties and agreements as are set forth in
Section 1 of the U.S. Underwriting Agreement, which Section is incorporated
herein by this reference.

                 2.  Subject to the terms and conditions herein set forth, (a)
each Selling Stockholder agrees, severally and jointly, to sell to the several
Underwriters the number of Firm Shares set forth opposite such Selling
Stockholder's name in Schedule II hereto, and each of the Underwriters agrees,
severally and not jointly, to purchase from the Selling Stockholders at a
purchase price per share of $_____ the number of Firm Shares set forth opposite
the name of such Underwriter in Schedule I hereto; each Underwriter shall be
obligated to purchase from each Selling Stockholder at a purchase price per
share of $_____, that number of Firm Shares (to be adjusted by you so as to
eliminate fractional shares) determined by multiplying the aggregate number of
Firm Shares to be sold by such Selling Stockholder as set forth opposite its 
name in Schedule II hereto by a fraction, the numerator of which is the
aggregate number of Firm Shares to be purchased by such Underwriter as set
forth opposite the name of such Underwriter in Schedule I hereto and the
denominator of which is the aggregate number of Firm Shares to be purchased by
all of the Underwriters from both of the Selling Stockholders hereunder and (b)
in the event and to the extent that the Underwriters shall exercise the
election to purchase Optional Shares as provided below, each Selling
Stockholder agrees, severally and not jointly, to sell to each of the
Underwriters, and each of the Underwriters agrees, severally and not jointly,
to purchase from the Selling Stockholders, at the purchase price per share set
forth in clause (a) of this Section 2, that portion of the number of Optional
Shares as to which such election shall have been exercised (to be adjusted by
you so as to eliminate fractional shares) determined by multiplying the number
of Optional Shares set forth opposite such Selling Stockholder's name on
Schedule II hereto by a fraction the numerator of which is the maximum number
of Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of the Optional Shares which all of the 
Underwriters are entitled to purchase hereunder.


                 The Selling Stockholders hereby grant to the Underwriters the
right to purchase at their election up to 300,000 Optional Shares, at the
purchase price per share set forth in the paragraph above, for the sole purpose
of covering over-allotments in the sale of the Firm Shares.  Any such election
to purchase Optional Shares may be exercised by written notice from you to the
Selling Stockholders, given within a period of 30 calendar days after the date
of this Agreement and setting forth the aggregate number of Optional Shares to
be purchased and the date on which such Optional Shares are to be delivered, as
determined by you but in no event earlier than the First Time of Delivery (as
defined in Section 4 hereof) or, unless you and the Selling Stockholders
otherwise agree in writing, earlier than two or later than ten business days
after the date of such notice.



                                      2

<PAGE>   3
                 3.  Upon the authorization by you of the release of the Firm
Shares, the several Underwriters propose to offer the Firm Shares for sale upon
the terms and conditions set forth in the Prospectus.

                 4.  Certificates in definitive form for the Shares to be
purchased by each Underwriter hereunder, and in such denominations and
registered in such names as Salomon Brothers International Limited may request
upon at least forty-eight hours' prior notice to the Company and the Selling
Stockholders, shall be delivered by or on behalf of each Selling Stockholder to
you for the account of such Underwriter, against payment by such Underwriter or
on its behalf of the purchase price therefor by certified or official bank
check or checks, payable to the order of such Selling Stockholder, in New York
Clearing House funds, all at the office of Salomon Brothers Inc, Seven World
Trade Center, New York, New York, or through the facilities of The Depository
Trust Company.  The time and date of such delivery and payment shall be, with
respect to the Firm Shares, 9:30 a.m., New York time, on _______ __, 199_ or at
such other time and date as you, the Company and the Selling Stockholders may
agree upon in writing, and, with respect to the Optional Shares, 9:30 a.m., New
York time, on the date specified by you in the written notice given by you of
the Underwriters' election to purchase such Optional Shares, or at such other
time and date as you, the Company and the Selling Stockholders may agree upon
in writing.  Such time and date for delivery of the Firm Shares is herein
called the "First Time of Delivery", such time and date for delivery of the
Optional Shares, if not the First Time of Delivery, is herein called the
"Second Time of Delivery", and each such time and date for delivery is herein
called a "Time of Delivery."  Such certificates will be made available for
checking and packaging at least twenty-four hours prior to each Time of
Delivery at such office of Salomon Brothers Inc.

                 5.  The Company hereby makes with the Underwriters and each of
the Selling Stockholders the same agreements as are set forth in Section 5 of
the U.S. Underwriting Agreement, which Section is incorporated herein by this
reference.

                 6.  The Company, each Selling Stockholder and the Underwriters
hereby agree with respect to certain expenses on the same terms as are set
forth in Section 6 of the U.S. Underwriting Agreement, which Section is
incorporated herein by this reference.

                 7.  Subject to the provisions of the Agreement between
Syndicates, the obligations of the Underwriters hereunder shall be subject, in
their discretion, at each Time of Delivery to the condition that all
representations and warranties and other statements of the Company and of each
Selling Stockholder herein are, at and as of such Time of Delivery, true and
correct, the condition that the Company and each Selling Stockholder shall have
performed all of their respective obligations hereunder theretofore to be
performed, and additional conditions identical to those set forth in Section 7
of the U.S. Underwriting Agreement, which Section is incorporated herein by
this reference.  The obligations of each Selling Stockholder hereunder shall be
subject, in its discretion, at each Time of Delivery, to conditions identical
to those applicable to it set forth in Section 7 of the U.S. Underwriting
Agreement.

                 8.  (a)  The Company will indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, and will reimburse
each Underwriter for any legal or other expenses reasonably incurred by such
Underwriter in connection with investigating or defending any such action or
claim as such expenses are incurred; provided, however, that the Company shall
not be liable in any such case to the extent that any such loss, claim, damage
or liability arises out of or is based upon an untrue statement or alleged
untrue statement or omission or alleged omission made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by any Underwriter through SBIL expressly for use
therein or by either Selling Stockholder expressly for use therein; and
provided, further, that the Company shall not





                                       3
<PAGE>   4
be liable to any Underwriter under the indemnity agreement in this subsection
(a) with respect to any Preliminary Prospectus to the extent that any such
loss, claim, damage or liability of such Underwriter results from the fact that
such Underwriter sold Shares to a person as to whom it shall be established
that there was not sent or given, at or prior to the written confirmation of
such sale, a copy of the Prospectus (excluding documents incorporated by
reference) or of the Prospectus as then amended or supplemented (excluding
documents incorporated by reference) in any case where such delivery is
required by the Act if the Company has previously furnished copies thereof to
such Underwriter and the loss, claim, damage or liability of such Underwriter
results from an untrue statement or omission of a material fact contained in
the Preliminary Prospectus which was corrected in the Prospectus (excluding
documents incorporated by reference) or in the Prospectus as then amended or
supplemented (excluding documents incorporated by reference).

                 (b)  Each Selling Stockholder (subject to the limitation on
indemnity set forth in subsection (g)) will indemnify and hold harmless each
Underwriter against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statement therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished by such Selling Stockholder to the Company, or to an Underwriter
through you, expressly for use therein; and will reimburse each Underwriter for
any legal or other expenses reasonably incurred by such Underwriter in
connection with investigating or defending any such action or claim as such
expenses are incurred; provided that such Selling Stockholder shall not be
liable to any Underwriter under the indemnity agreement in this subsection (b)
with respect to any Preliminary Prospectus to the extent that any such loss,
claim, damage or liability of such Underwriter results from the fact that such
Underwriter sold Shares to a person as to whom it shall be established that
there was not sent or given, at or prior to the written confirmation of such
sale, a copy of the Prospectus (excluding documents incorporated by reference)
or of the Prospectus as then amended or supplemented (excluding documents
incorporated by reference) in any case where such delivery is required by the
Act if the Company has previously furnished copies thereof to such Underwriter
and the loss, claim, damage or liability of such Underwriter results from an
untrue statement or omission of a material fact contained in the Preliminary
Prospectus which was corrected in the Prospectus (excluding documents
incorporated by reference) or in the Prospectus as then amended or supplemented
(excluding documents incorporated by reference).

                 (c)  Each Underwriter will indemnify and hold harmless the
Company and each Selling Stockholder against any losses, claims, damages or
liabilities to which the Company or such Selling Stockholder may become
subject, under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in
any Preliminary Prospectus, the Registration Statement or the Prospectus, or
any amendment or supplement thereto, or arise out of or are based upon the
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein not misleading, in
each case to the extent, but only to the extent, that such untrue statement or
alleged untrue statement or omission or alleged omission was made in any
Preliminary Prospectus, the Registration Statement or the Prospectus or any
such amendment or supplement in reliance upon and in conformity with written
information furnished to the Company by such Underwriter through SBIL expressly
for use therein; and will reimburse the Company and such Selling Stockholder
for any legal or other expenses reasonably incurred by the Company or such
Selling Stockholder in connection with investigating or defending any such
action or claim as such expenses are incurred.

                 (d)  Promptly after receipt by a party entitled to
indemnification under subsection (a), (b) or (c) above (the "indemnified
party") of notice of the commencement of any action, such indemnified party





                                       4
<PAGE>   5
shall, if a claim in respect thereof is to be made against a party required to
provide indemnification to such indemnified party under such subsection (the
"indemnifying party"), notify the indemnifying party in writing of the
commencement thereof; but the omission so to notify the indemnifying party
shall not relieve it from any liability which it may have to any indemnified
party otherwise than under such subsection.  In case any such action shall be
brought against any indemnified party and it shall notify the indemnifying
party of the commencement thereof, the indemnifying party shall be entitled to
participate therein and, to the extent that it shall wish, jointly with any
other indemnifying party similarly notified, to assume the defense thereof,
with counsel satisfactory to such indemnified party (which shall not, except
with the consent of the indemnified party, be counsel to the indemnifying
party), and, after notice from the indemnifying party to such indemnified party
of its election so to assume the defense thereof, the indemnifying party shall
not be liable to such indemnified party under such subsection for any legal
expenses of other counsel or any other expenses, in each case subsequently
incurred by such indemnified party, in connection with the defense thereof
other than reasonable costs of investigation.  In no event shall an
indemnifying party be liable for the fees and expenses of more than one counsel
(in addition to any local counsel), apart from counsel to such indemnifying
party, for all indemnified parties in connection with any one action or
separate but similar or related actions arising out of the same general
allegations or circumstances.  No indemnifying party shall be liable for any
settlement of any such action effected without its consent, provided that such
consent is not unreasonably withheld or delayed.

                 (e)  If the indemnification provided for in this Section 8 is
unavailable to or insufficient to hold harmless an indemnified party under
subsection (a), (b) or (c) above in respect of any losses, claims, damages or
liabilities (or actions in respect thereof) referred to therein, then each
indemnifying party shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities
(or actions in respect thereof) in such proportion as is appropriate to reflect
the relative benefits received by the Company and the Selling Stockholders on
the one hand and the Underwriters on the other from the offering of the Shares.
If, however, the allocation provided by the immediately preceding sentence is
not permitted by applicable law or if the indemnified party failed to give the
notice required under subsection (d) above, then each indemnifying party shall
contribute to such amount paid or payable by such indemnified party in such
proportion as is appropriate to reflect not only such relative benefits but
also the relative fault of the Company and the Selling Stockholders on the one
hand and the Underwriters on the other in connection with the statements or
omissions which resulted in such losses, claims, damages or liabilities (or
actions in respect thereof), as well as any other relevant equitable
considerations.  The relative benefits received by the Company and the Selling
Stockholders on the one hand and the Underwriters on the other shall be deemed
to be in the same proportion as the total net proceeds from the offering of the
Shares purchased under this Agreement (before deducting expenses) received by
the Company and the Selling Stockholders on the one hand bear to the total
underwriting discounts and commissions received by the Underwriters on the
other with respect to the Shares purchased under this Agreement, in each case
as set forth in the table on the cover page of the Prospectus.  The relative
fault shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
the Company or either Selling Stockholder on the one hand or the Underwriters
on the other and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.  The Company,
the Selling Stockholders and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (e) were determined
by pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (e).  The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to
above in this subsection (e) shall be deemed to include any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim.  Notwithstanding the
provisions of this subsection (e), (i) no Underwriter shall be required to
contribute any amount in excess of the amount by which the total price at which
the Shares underwritten by it and distributed to the public were offered to the
public exceeds the amount of any damages which such Underwriter has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission and (ii) neither Selling Stockholder shall be
required to contribute any amount in excess of the amount by which proceeds
received by such Selling Stockholder from the Shares sold by it pursuant to
this Agreement exceeds that amount of any damages which such Selling
Stockholder has otherwise paid or become liable to pay by reason of any untrue
statement or alleged untrue statement or omission or alleged omission.  No 
person guilty of fraudulent misrepresentation (within the meaning of 
Section 11(f) of the Act) shall be





                                       5
<PAGE>   6
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation.  The Underwriters' obligations in this subsection (e) to
contribute are several in proportion to their respective underwriting
obligations and not joint.

                 (f)  The obligations of the Company and each Selling
Stockholder under this Section 8 shall be in addition to any liability which
the Company and such Selling Stockholder may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Act; and the obligations of the
Underwriters under this Section 8 shall be in addition to any liability which
the respective Underwriters may otherwise have and shall extend, upon the same
terms and conditions, to each officer and director of the Company and to each
partner of each Selling Stockholder and to each person, if any, who controls 
the Company and each Selling Stockholder within the meaning of the Act.

                 (g)  Notwithstanding the foregoing, in no event shall either
Selling Stockholder be required to pay an amount in indemnification and
contribution under subsection (b) above in excess of the total proceeds 
received by such Selling Stockholder from the Shares sold by it pursuant to 
this Agreement.

                 (h)  With respect to rights and obligations of the Company and
the Selling Stockholders vis a vis each other, nothing in this Section 8 shall
be construed to modify or supersede such rights and obligations as set forth in
the Amended and Restated Registration Rights Agreement dated as of September
30, 1987 among the Company, the predecessor to Allied Signal, Inc. and the
Selling Stockholders and the letter dated April 20, 1995 from the Selling
Stockholders to the Company (and Allied Signal, Inc.).

                 9.  (a)  If any Underwriter shall default in its obligation to
purchase the Shares which it has agreed to purchase hereunder at a Time of
Delivery, you may in your discretion arrange for you or another party or other
parties to purchase such Shares on the terms contained herein.  If within
thirty-six hours after such default by any Underwriter you do not arrange for
the purchase of such Shares, then the Selling Stockholders shall be entitled to
a further period of thirty-six hours within which to procure another party or
other parties satisfactory to you to purchase such Shares on such terms.  In
the event that, within the respective prescribed periods, you notify the
Selling Stockholders that you have so arranged for the purchase of such Shares,
or the Selling Stockholders notify you that they have so arranged for the
purchase of such Shares, you or the Selling Stockholders shall have the right
to postpone such Time of Delivery for a period of not more than seven days, in
order to effect whatever changes may thereby be made necessary in the
Registration Statement or the Prospectus, or in any other documents or
arrangements, and the Company agrees to file promptly any amendments to the
Registration Statement or the Prospectus which in your opinion and the opinion
of the Company may thereby be made necessary.  The term "Underwriter" as used
in this Agreement shall include any person substituted under this Section 9 with
like effect as if such person had originally been a party to this Agreement
with respect to such Shares.

                 (b)  If, after giving effect to any arrangements for the
purchase of the Shares of a defaulting Underwriter or Underwriters by you and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased does not exceed one-eleventh of
the aggregate number of all the Shares to be purchased at such Time of
Delivery, then the Selling Stockholders shall have the right to require each
non-defaulting Underwriter to purchase the number of Shares which such
Underwriter agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

                 (c)  If, after giving effect to any arrangements for the
purchase of the Shares of a defaulting Underwriter or Underwriters by you and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased exceeds one-eleventh of the
aggregate number of all the Shares to be purchased at such Time of Delivery, or
if the Selling Stockholders shall





                                       6
<PAGE>   7
not exercise the right described in subsection (b) above to require
non-defaulting Underwriters to purchase Shares of a defaulting Underwriter or
Underwriters, then this Agreement (or, with respect to the Second Time of
Delivery, the obligations of the Underwriters to purchase and of the Selling
Stockholders to sell the Optional Shares) shall thereupon terminate, without
liability on the part of any non-defaulting Underwriter or the Company or the
Selling Stockholders, except for the expenses to be borne by the Company, the
Selling Stockholders and the Underwriters as provided in Section 6 hereof and
the indemnity and contribution agreements in Section 8 hereof; but nothing
herein shall relieve a defaulting Underwriter from liability for its default.

                 10.  The respective indemnities, agreements, representations,
warranties and other statements of the Company, each Selling Stockholder and
the several Underwriters, as set forth in this Agreement or made by or on
behalf of them, respectively, pursuant to this Agreement, shall remain in full
force and effect, regardless of any investigation (or any statement as to the
results thereof) made by or on behalf of any Underwriter or any controlling
person of any Underwriter, or the Company or the Selling Stockholders, or any
officer or director or controlling person of the Company or the Selling
Stockholders, and shall survive delivery of and payment for the Shares.

                 11.  If this Agreement shall be terminated pursuant to Section
9 hereof, neither the Company nor the Selling Stockholders shall then be under
any liability to any Underwriter except as provided in Section 6 and Section 8
hereof; but, if for any other reason any Shares are not delivered by or on
behalf of either Selling Stockholder as provided herein, the Company will 
reimburse the Underwriters through SBIL for all of their out-of-pocket
expenses approved in writing by SBIL, including fees and disbursements of
counsel, reasonably incurred by the Underwriters in making preparations for the
purchase, sale and delivery of the Shares not so delivered, but the Company and
the Selling Stockholders shall then be under no further liability to any
Underwriter in respect of the Shares not so delivered except as provided in
Section 6 and Section 8 hereof.

                 12.  In all dealings hereunder, you shall act on behalf of
each of the Underwriters, and the parties hereto shall be entitled to act and
rely upon any statement, request, notice or agreement on behalf of any
Underwriter made or given by you.

                 All statements, requests, notices and agreements hereunder
shall be in writing, and if to the Underwriters shall be delivered or sent by
mail, telex or facsimile transmission to the Underwriters in care of SBIL,
Seven World Trade Center, New York, New York 10048, Attention: ______, Telex
No. ______, facsimile transmission no. ______; if to either Selling Stockholder
shall be delivered or sent by mail, telex or facsimile transmission to such
Selling Stockholder at ______________, Attention: _________; and if to the
Company shall be delivered or sent by mail, telex or facsimile transmission to
the address of the Company set forth in the Registration Statement, Attention:
Secretary; provided, however, that any notice to an Underwriter pursuant to
Section 8(d) hereof shall be delivered or sent by mail, telex or facsimile
transmission to such Underwriter at its address set forth in its Underwriters'
Questionnaire, or telex constituting such Questionnaire, which address will be
supplied to the Company or either Selling Stockholder by SBIL upon request.
Any such statements, requests, notices or agreements shall take effect upon
receipt thereof.

                 13.  This Agreement shall be binding upon, and inure solely 
to the benefit of, the Underwriters, the Company and the Selling Stockholders 
and, to the extent provided in Sections 8 and 10 hereof, the officers and 
directors of the Company and the partners of either Selling Stockholder and 
each person who controls the Company, either Selling  Stockholder or any 
Underwriter, and their respective heirs, executors, administrators, successors 
and assigns, and no other person shall acquire or have any right under or by 
virtue of this Agreement.  No purchaser of any of the Shares from any 
Underwriter shall be deemed a successor or assign by reason merely of such 
purchase.

                 14. No partner of either Selling Stockholder or any successor
general partner or such Selling Stockholder shall have any personal liability
for the performance of any of such Selling Stockholder's obligations hereunder,
and any liability or obligation of such Selling Stockholder arising hereunder
shall be limited to and satisfied only out of the property of such Selling
Stockholder.

                 15.  Time shall be of the essence of this Agreement.





                                       7
<PAGE>   8
                 16.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, UNITED STATES OF AMERICA.

                 17.  This Agreement may be executed by any one or more of the
parties hereto in any number of counterparts, each of which shall be deemed to
be an original, but all such counterparts shall together constitute one and the
same instrument.





                                       8
<PAGE>   9
                 If the foregoing is in accordance with your understanding,
please sign and return to us nine counterparts hereof, and upon the acceptance
hereof by you, on behalf of each of the Underwriters, this letter and such
acceptance hereof shall constitute a binding agreement among each of the
Underwriters, the Company and the Selling Stockholders.

                                  Very truly yours,

                                  UNION TEXAS PETROLEUM
                                    HOLDINGS, INC.


                                  By:___________________________________________
                                     Name:
                                     Title:


                                  PETROLEUM ASSOCIATES, L.P.


                                  By:__________________________________________
                                     Name:
                                     Title:

                                  KKR PARTNERS II, L.P.


                                  By:__________________________________________
                                     Name:
                                     Title:





                                       9
<PAGE>   10
Accepted as of the date hereof
at New York, New York:

SALOMON BROTHERS INTERNATIONAL LIMITED
CS FIRST BOSTON LIMITED
GOLDMAN SACHS INTERNATIONAL
MERRILL LYNCH INTERNATINOAL LIMITED


By: SALOMON BROTHERS INTERNATIONAL LIMITED,
      representative of the Underwriters




By:  ______________________________________

     Name:_________________________________

     Title: _______________________________





                                       10
<PAGE>   11
                                   SCHEDULE I




<TABLE>
<CAPTION>
                                                                                            Number of
                                                                                         Optional Shares
                                                              Total Number               to be Purchased
                                                             of Firm Shares                if Maximum
          Underwriter                                        to be Purchased            Option Exercised
          -----------                                        ---------------            ----------------
<S>                                                          <C>                        <C>
Salomon Brothers International Limited  . . . . . . .
CS First Boston Limited  . . . . . . . . .
Goldman Sachs International .   . . . . . . . . . . .
Merrill Lynch International Limited . . . . . . . . .        ______________             ______________











           Total  . . . . . . . . . . . . . . . . . .         2,000,000                      300,000
                                                          ==================            ================
</TABLE>
<PAGE>   12
                                  SCHEDULE II



<TABLE>
<CAPTION>
                                                                                                 Number of
                                                                                                 Optional Shares
                                                                  Total Number                   to be Sold
                                                                  of Firm Shares                 if Maximum
SELLING STOCKHOLDER                                               to be Sold                     Option Exercised
- -------------------                                               --------------                 ----------------
<S>                                                                  <C>                            <C>
Petroleum Associates, L.P.  . . . . . . . . . . . . .
KKR Partners II, L.P.   . . . . . . . . . . . . . . .
</TABLE>

<PAGE>   1

                                                          EXHIBIT 3.1


                       CERTIFICATE OF AMENDMENT
                                  OF
                RESTATED CERTIFICATE OF INCORPORATION
                                  OF
                 UNION TEXAS PETROLEUM HOLDINGS, INC.


        UNION TEXAS PETROLEUM HOLDINGS, INC., a corporation organized and
existing under and by virtue of the General Corporation Law of the State of
Delaware (the "Corporation"), DOES HEREBY CERTIFY THAT:

        FIRST: At a meeting of the Board of Directors of the Corporation,
resolutions were duly adopted setting forth a proposed amendment to the
Restated Certificate of Incorporation of the Corporation, declaring said
amendment to be advisable and directing that the amendment proposed be
considered at the next annual meeting of the stockholders of the Corporation.
The resolution setting forth the proposed amendment is as follows:

        NOW, THEREFORE, BE IT RESOLVED, that Article Fourth of the Restated
Certificate of Incorporation of the Company (the "Certficate") be amended (i)
to change the total number of shares of all classes of capital stock which the
Company shall have authority to issue from 202,000,000 to 215,000,000 shares,
(ii) to increase the authorized number of shares of Preferred Stock from
2,000,000 shares to 15,000,000 shares, and (iii) to change the par value of the
Preferred Stock from one dollar ($1.00) per share to one cent ($.01) per share,
so the first paragraph of Article Fourth shall be amended to read in its
entirety as follows:

                "The total number of shares of all classes of capital stock
        which the Corporation shall have authority to issue is Two Hundred
        Fifteen Million (215,000,000), of which Fifteen Million (15,000,000)
        shares shall be Preferred Stock of the par value one cent ($.01) per
        share and Two Hundred Million (200,000,000) shares shall be Common
        Stock of the par value of five cents ($.05) per share."

        FURTHER RESOLVED, that Section A of Article Fourth, entitled "Preferred
Stock," be amended to read in its entirety as follows:

                A. Preferred Stock. The Board of Directors is expressly
        authorized to provide for the issue of all or any shares of the 
        Preferred Stock, in one or more series, and to fix for each such 
        series such voting powers, full or limited, or no voting powers, and 
        such designations, preferences and relative, participating, optional 
        or other special rights and such qualifications, limitations or 
        restrictions thereof, as shall be stated and expressed in 








<PAGE>   2
        the resolution or resolutions adopted by the Board of Directors
        providing for the issue of such series (a "Preferred Stock
        Designation") and as may be permitted by the General Corporation Law of
        the State of Delaware. The number of authorized shares of Preferred
        Stock may be increased or decreased (but not below the number of shares
        thereof then outstanding) by the affirmative vote of the holders of a
        majority of the voting power of all of the then outstanding shares of
        the capital stock of the Corporation entitled to vote generally in the
        election of directors (the "Voting Stock") voting together as a single
        class, without a separate vote of the holders of the Preferred Stock,
        or any series thereof, unless a vote of any such holders is required
        pursuant to any Preferred Stock Designation."

        SECOND: Thereafter, pursuant to resolution of its Board of Directors,
an annual meeting of stockholders of the Corporation was duly called and held,
upon notice in accordance with Section 222 of the General Corporation Law of
the State of Delaware, at which meeting the necessary number of shares as
required by statute were voted in favor of said amendment.

        THIRD: The aforesaid amendment was duly adopted in accordance with the
provisions of Section 242 of the General Corporation Law of the State of
Delaware.

        IN WITNESS WHEREOF, UNION TEXAS PETROLEUM HOLDINGS, INC. has caused
this certificate to be signed by Newton W. Wilson, III, its General Counsel,
Vice President-Administration and Secretary, this 10th day of May, 1995.



                                 UNION TEXAS PETROLEUM HOLDINGS, INC.
                                 
                                 
                                 By: /s/  NEWTON W. WILSON, III
                                     -----------------------------------------
                                          Newton W. Wilson, III
                                          General Counsel, Vice President -
                                          Administration and Secretary












<PAGE>   3
                                      
                    RESTATED CERTIFICATE OF INCORPORATION
                                      OF
                     UNION TEXAS PEROLEUM HOLDINGS, INC.
                      (Incorporated on December 9, 1982)

     FIRST:  The name of the Corporation is:

                     UNION TEXAS PETROLEUM HOLDINGS, INC.

     SECOND:  The address of the Corporation's registered office in the State
of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of
Wilmington, County of New Castle. The name of the Corporation's registered
agent at such address is The Corporation Trust Company.

     THIRD:  The nature of the business or purposes to be conducted or promoted
by the Corporation is to engage in any lawful act or activity for which
corporations may be organized under the General Corporation Law of the State of
Delaware.

     FOURTH:  The total number of shares of all classes of capital stock which
the Corporation shall have authority to issue is Two Hundred Two Million
(202,000,000) of which Two Million (2,000,000) shares shall be Preferred Stock
of the par value of One Dollar ($1.00) per share and Two Hundred Million
(200,000,000) shares shall be Common Stock of the par value of five cents
($.05) per share.

     A.  Preferred Stock.  Except with respect to the series of Preferred Stock
expressly herein designated in this Article Fourth, the Board of Directors is
expressly authorized to provide for the issue of all or any shares of the
Preferred Stock, in one or more series, and to fix for each such series such
voting powers, full or limited, or no voting powers, and such designations,
preferences and relative, participating, optional or other special rights and
such qualifications, limitations or restrictions thereof, as shall be stated
and expressed in the resolution or resolutions adopted by the Board of
Directors providing for the issue of such series (a "Preferred Stock
Designation") and as may be permitted by the General Corporation Law of the
State of Delaware. The number of authorized shares of Preferred Stock may be
increased or decreased (but not below the number of shares thereof then
outstanding) by the affirmative vote of the holders of a majority of the voting
power of all of the then outstanding shares of the capital stock of the 
Corporation entitled to vote generally in the election of directors (the 
"Voting Stock") voting together as a single class, without a separate vote of 
the holders of the Preferred Stock, or any series thereof, unless a vote of 
any such holders is required pursuant to any Preferred Stock Designation.

     A Certificate of Designation creating a series of Cumulative Preferred
Stock providing for an issue of 1,000,000 shares of Preferred Stock designated
"8% Cumulative Series B Preferred Stock" was filed with the Secretary of State
of Delaware on June 27, 1985. Each share of the 8% Cumulative Series B
Preferred Stock is hereby converted into, reclassified and redesignated as a
share of 20% Series B Redeemable Stock as hereinafter designated. A Certificate
of Designation creating a series of Cumulative Preferred Stock providing for an
issue of 1,000,000 shares of Preferred Stock designated "Cumulative Series C
Preferred Stock" was filed with the Secretary of State of Delaware on 
November 15, 1985. Each share of the Cumulative Series C Preferred Stock is
hereby converted into, reclassified and redesignated as a share of 20.75%
Series C Redeemable Stock as hereinafter designated. The designation,
preferences and relative, participating, optional and other special rights, and
the qualifications, limitations and restrictions of the 20% Series B
Redeemable Preferred Stock and the 20.75% Series C Redeemable Preferred Stock
are as follows:


<PAGE>   4

     1.  Designation.  The distinctive designations of the two series are 
(i) the "20% Series B Redeemable Preferred Stock" (hereinafter, the "Series B
Preferred Stock") and (ii) the "20.75% Series C Redeemable Preferred Stock"
(hereinafter, the "Series C Preferred Stock").

     2.  Certain Definitions.  Unless the context otherwise requires, the terms
defined in this paragraph 2 shall have, for all purposes, the meanings herein
specified.

        Dividend Period.  The term "Dividend Period" shall have the meaning
    set forth in paragraph 3 below.

        Junior Stock.  The term "Junior Stock" shall mean any class of Common
    Stock of the Corporation and any other class or series of stock of the
    Corporation, howsoever designated, which is not entitled to receive any
    dividends in any Dividend Period unless all dividends required to have been
    paid or declared and set apart for payment on the Series B Preferred Stock
    and the Series C Preferred Stock shall have been so paid or declared and
    set apart for payment or, for purposes of paragraph 4 below, shall mean any
    class of Common Stock of the Corporation, howsoever designated, not
    entitled to receive any assets upon liquidation, dissolution or winding up
    of the affairs of the Corporation until the Series B Preferred Stock and
    the Series C Preferred Stock shall have received the entire amount to which
    such stock is entitled upon such liquidation, dissolution or winding up.

        Liquidation Price.  The term "Liquidation Price" shall have the meaning
    set forth in paragraph 4 below.

        Parity Stock.  The term "Parity Stock" shall mean any class or series
    of stock of the Corporation entitled to receive payment of dividends on a
    parity with the Series B Preferred Stock and the Series C Preferred Stock
    or, for purposes of paragraph 4 below, shall mean any other class or series
    of stock of the Corporation entitled to receive assets upon liquidation,
    dissolution or winding up of the affairs of the Corporation on a parity
    with the Series B Preferred Stock and the Series C Preferred Stock. The
    Series B Preferred Stock and the Series C Preferred Stock are Parity Stock.

        Senior Stock.  The term "Senior Stock" shall mean any class or series
    of stock of the Corporation ranking senior to the Series B Preferred Stock
    and the Series C Preferred Stock in respect of the right to receive 
    dividends, or, for the purposes of paragraph 4 below, shall mean any 
    class or series of stock of the Corporation ranking senior to the Series B 
    Preferred Stock and the Series C Preferred Stock in respect of the right 
    to participate in any distribution upon liquidation, dissolution or 
    winding up of the affairs of the Corporation.

    3. Dividends.  Subject to the prior preferences and other rights of any  
Senior Stock, (i) each issued and outstanding share of Series B Preferred  
Stock shall entitle the holder of record thereof as of the "record date" to     
receive, when and as declared by the Board of Directors, out of any funds
legally available therefor, cash dividends at the rate of 8% per annum for
dividends accruing through September 30, 1987 and 20% per annum for dividends
accruing after September 30, 1987, and no more and (ii) each issued and
outstanding share of Series C Preferred Stock shall entitle the holder of
record thereof as of the "record date" to receive, when and as declared by the
Board of  Directors, out of any funds legally available therefor, cash
dividends at the rate of 8.75% per annum for dividends accruing through
September 30, 1987 and 20.75% per annum for dividends accruing after September
30, 1987, and no more. Such dividends shall be payable quarterly on March 31,
June 30, September 30 and December 31 of each year. The quarterly period
between consecutive dates for payment of dividends shall hereinafter be
referred to as a "Dividend Period." As used above, the term "record date" means
March 15, June 15, September 15 and December 15 of each year, or such other
record date designated by the Board of Directors of the Corporation with
respect to the dividend payable on such respective dividend payment date.

     If for any Dividend Period holders of the Series B Preferred Stock or the
Series C Preferred Stock shall not receive the full dividends provided for in
this paragraph 3, such unpaid dividends for such Dividend Period shall be
cumulative, and shall accrue without interest on a day-to-

<PAGE>   5

day basis, whether or not earned or declared, from and after the date when
payment thereof would have been due.

     So long as any shares of Series B Preferred Stock or the Series C Preferred
Stock shall be outstanding, the Corporation shall not declare or pay on any
Junior Stock any dividend whatsoever, whether in cash, property or otherwise
(other than dividends payable in shares of any class or series of Junior Stock,
together with cash in lieu of fractional shares), nor shall the Corporation
make any other distribution on any Junior Stock, nor shall any Junior Stock be
purchased or redeemed by the Corporation for value, nor shall any monies be
paid or set apart for a sinking fund for the purchase or redemption of any
Junior Stock, unless (i) all dividends to which the holders of the Series B
Preferred Stock and the Series C Preferred Stock shall have been entitled for
all previous Dividend Periods shall have been paid or declared and a sum or
money sufficient for the payment thereof set apart and (ii) all required
mandatory redemptions of this Series B Preferred Stock and the  Series C
Preferred Stock shall have been made; provided, however, that, notwithstanding
the foregoing, the Corporation may at any time repurchase its Junior Stock (x)
as may be required or permitted by the terms of any stock subscription,
purchase or option agreements between the Corporation and employees thereof
existing on September 30, 1987 or (y) pursuant to Section 3 of the Shareholders
Agreement, as amended from time to time, by and among the Corporation and
certain shareholders dated April 19, 1985, a copy of which will be furnished to
any shareholder upon request therefor to the Corporation (the "Shareholders
Agreement").

     All dividends on the Series B Preferred Stock and the Series C Preferred
Stock and on any class or series of Parity Stock for any year shall be declared
pro rata so that the amounts of dividends per share declared during such year
on the Series B Preferred Stock, the Series C Preferred Stock and on any class
or series of Parity Stock shall in all cases bear to each other the same
proportions as do the respective full amounts of dividends to which the holders
of the Series B Preferred Stock, the Series C Preferred Stock and each class or
series of Parity Stock would be entitled to be paid, if declared during such
year, and so that the amount of dividends per share declared during such year
on shares of the Series B Preferred Stock and the Series C Preferred Stock 
with differing dividend rates bear to each other the same proportions as such 
respective dividend rates. In the event of the payment of any dividends for 
any period other than a Dividend Period, the amount of the dividend shall be 
prorated based on a dividend period of 90 days with three 30-day months.

     4.  Distributions Upon Liquidation, Dissolution or Winding Up.  In the 
event of any voluntary or involuntary liquidation, dissolution or other 
winding up of the affairs of the Corporation, subject to the prior preferences 
and other rights of any Senior Stock, but before any distribution or payment 
shall be made to the holders of Junior Stock, the holders of the Series B 
Preferred Stock and the Series C Preferred Stock shall be entitled to be paid 
$100 per share of Series B Preferred Stock and Series C Preferred Stock (the
"Liquidation Price") plus any accrued and unpaid dividends thereon to the date  
of such liquidation or dissolution or such other winding up, and no more, in
cash. If, upon any such liquidation, dissolution or other winding up of the
affairs  of the Corporation, the net assets of the Corporation distributable
among the  holders of all outstanding shares of the Series B Preferred Stock,
the Series C Preferred Stock and of any Parity Stock shall be insufficient to
permit the payment in full to such holders of preferential amounts to which
they are entitled, then the entire net assets of the Corporation remaining
after the distributions to holders of any Senior Stock of the full amounts to
which they may be entitled shall be distributed among the holders of the Series
B Preferred Stock, the Series C Preferred Stock and any Parity Stock ratably in
proportion to the full amounts to which they would otherwise be respectively 
entitled. Neither the consolidation or merger of the Corporation into or with
another corporation or corporations, nor the sale, lease or conveyance of all
or any part of the assets of the corporation to another corporation or
corporations shall be deemed a liquidation, dissolution or winding up of the
affairs of the Corporation within the meaning of this paragraph 4.

     5.  Voting Rights.

     (a) Except as in this paragraph 5 or by law expressly provided, neither
the Series B Preferred Stock nor the Series C Preferred Stock shall have any
right or power to vote on any question or in any proceeding or to be
represented at or to receive notice of any meeting of stockholders. On any 

<PAGE>   6
matters in which the holders of the Series B Preferred Stock and the Series C 
Preferred Stock shall be entitled to vote, they shall be entitled to one vote
for each share held.

        (b) As long as any shares of the Series B Preferred Stock or the Series
C Preferred Stock are outstanding, the Corporation shall not, without the
consent of the holders of at least two-thirds (2/3) of the aggregate number of
shares of the Series B Preferred Stock and the Series C Preferred Stock and any
other Preferred Stock affected by such matter, as applicable, at the time
outstanding, given in person or by proxy, either in writing or by vote at a
meeting called for the purpose, (i) authorize, create or issue, or increase the
authorized or issued amount of any Senior Stock, or (ii) amend, alter or repeal
any of the provisions of paragraph A of this Article Fourth so as to affect
adversely the rights, powers or preferences of the Series B Preferred Stock or
the Series C Preferred Stock, or of the holders thereof; provided, however,
that the Corporation, without the vote or consent of any holders of the Series
B Preferred Stock or Series C Preferred Stock, may amend the Certificate of
Incorporation to increase the number of authorized shares of Preferred Stock of
the Corporation which are without designation or which are Junior Stock or
Parity Stock, and may authorize, create or issue, or increase the authorized or
issued amount of, any series of Junior Stock and Parity Stock.

        (c) Upon the occurence and during the continuance of any of the
following events, the number of directors of the Corporation then constituting
the entire Board of Directors of the Corporation shall automatically be
increased by two directors, without any amendment of the Corporation's Bylaws,
and the holders of the outstanding Series B Preferred Stock or Series C 
Preferred Stock, as the case may be, shall have the exclusive right with the
holders of each other outstanding series of Preferred Stock of the Corporation
that also grants such voting right, voting together with such other holders as
a class separate from other classes of stock entitled to vote, to elect two
additional members of the Board of Directors:

        (i) Dividends payable on the Series B Preferred Stock or the Series C
     Preferred Stock, as the case may be, shall be in arrears in an aggregate
     amount equivalent to not less than six full quarterly dividends on the
     Series B Preferred Stock or the Series C Preferred Stock at the time
     outstanding; or

        (ii) Any mandatory redemption payment on the Series B Preferred Stock
     or the Series C Preferred Stock, as the case may be, shall not have been
     made in accordance with paragraph 6(b) of Article Fourth and shall be in
     arrears for a period exceeding 180 days.

At any time when such election rights shall have vested, the Corporation may,
and upon the written request of the holders of record of not less than 20% of 
the total number of shares of all series in arrears then outstanding or with
respect to which mandatory redemption payments have not been made shall, call a
special meeting of the holders of such shares to fill such newly-created
directorships for the election of directors.  In the case of such written
request, such special meeting shall be held within 90 days after delivery of
such request, and, in each case, at the place and upon notice provided by law
and in the Corporation's Bylaws, provided, that the Corporation shall not be
required to call such a special meeting if such request is received less than
120 days before the date fixed for the next ensuing annual meeting of the
Corporation's stockholders, at which meeting such newly-created directorships
shall be filled by the holders of the Series B Preferred Stock and Series C
Preferred Stock (as the case may be) as provided herein.  Such election right
shall continue until such time as all dividends on the Series B Preferred
Stock or the Series C Preferred Stock (as the case may be) for all past dividend
periods and such mandatory redemption payment shall have been paid in full, at
which time the right for the Series B Preferred Stock or the Series C Preferred
Stock (as the case may be) to vote and to be represented at and to receive
notice of meetings shall teminate, except as in this paragraph 5 or by law
expressly provided, subject to revesting in the event of each and every
subsequent default of the character and for the time above mentioned.

        At any meeeting of stockholders held for the purpose of electing
directors at which the Series B Preferred Stock or the Series C Preferred Stock
shall have the right, voting as a class with all other holders of Preferred
Stock of the Corporation having such right (the "Preferred Stock Class"), to
elect directors as aforesaid, the presence in person or by proxy of one-third of
the outstanding shares of the Preferred Stock Class shall be required to
constitute a quorum thereof for the election of any 
<PAGE>   7

director by the Preferred Stock Class. If such quorum be present, then such
directors may be elected by the Preferred Stock Class irrespective of whether
stock having such voting power with respect to the election of other directors 
as may be present at the meeting in person or by proxy, shall, for the purpose 
of electing directors, constitute a quorum for such purpose.

     If at any such meeting or adjournment thereof a quorum of the Preferred
Stock Class shall not be present, no election of the directors to be elected
thereby shall take place and the meeting shall be adjourned from time to time
for periods not exceeding 30 days until a quorum of the Preferred Stock Class
is present at such adjourned meeting.

     The term of office of all directors in office elected by the Preferred
Stock Class when voting power shall, as aforesaid, become vested in the
Preferred Stock Class shall terminate upon the earlier to occur of 10 days
after the date on which the events described in paragraphs 2(c)(i) and (ii) no
longer exist or the election of any new directors at any meeting of
stockholders called for the purpose of electing directors.

     6.  Redemption.

     (a)  Optional.  The Corporation may, at its option, redeem out of funds
legally available therefor, at any time, or from time to time, any or all of
the then outstanding shares of the Series B Preferred Stock or the Series C
Preferred Stock, at a redemption price of $100 per share plus the following
redemption premium ("redemption premium") per share (plus an amount equal 
to accrued and unpaid dividends, if any, including a partial dividend to the 
date of redemption) (hereinafter referred to as the "optional redemption 
prices"):

             During the
              12-month
           period beginning
              January 1,

                1987                                 $ 52.70
                1988                                   48.40
                1989                                   43.40
                1990                                   37.60
                1991                                   30.90
                1992                                   23.10
                1993                                   14.10
                1994                                   11.00

     In the event of a redemption on a day other than January 1 of any year,
the Optional Redemption price shall be $100 per share plus a redemption premium
equal to the redemption premium as of January 1 of the current year less the
product of: (x) the difference between (i) the redemption premium as of 
January 1 of the current year and (ii) the redemption premium as of January 1
of the next succeeding year, multiplied by (y) a fraction the numerator of
which is the number of days which have elapsed since January 1 of the current
year (assuming that each month consists of 30 days) and the denominator of
which is 360.

     In the event that any of the Warrants (the "Warrants") issued pursuant to
the Warrant Agreement (as amended from time to time, the "Warrant Agreement"),
dated as of September 30, 1987, entered into by the Corporation are 
(i) redeemed, (ii) cancelled pursuant to the terms of the Stock Acquisition 
Agreement, dated as of April 19, 1985, entered into by the Corporation and 
certain other parties, as amended from time to time or (iii) made subject to 
an "Accelerated Exercise Date" 


<PAGE>   8

under the Warrant Agreement, then from and after the date of such redemption or
cancellation or such Accelerated Exercise Date the amount of such redemption
premium set forth above shall be adjusted to equal the amount set forth above
multiplied by a fraction, the numerator of which shall be the number of
Warrants remaining outstanding after such redemption, cancellation or
Accelerated Exercise Date (assuming for these purposes that all Warrants made
exercisable on said Accelerated Exercise Date are exercised on such date) and
the denominator of which shall be 3,000,000 (in each case, adjusted for splits,
reclassifications or combinations in the number of Warrants under the Warrant
Agreement).

     The redemption price for shares redeemed shall be paid to the holders of
record of the Series B Preferred Stock or the Series C Preferred Stock (as the
case may be) so redeemed on the date of redemption. The Corporation shall give
at least 20 days' but not more than 60 days' prior written notice by first
class mail, postage prepaid, to each holder whose shares are to be redeemed,
notifying such holder of the election of the Corporation to redeem such shares,
the number of shares to be redeemed and the date fixed for redemption. In the
event of a redemption of less than all the outstanding shares of Series B
Preferred Stock or the Series C Preferred Stock, the shares to be redeemed
shall be selected pro rata to the holders thereof.

     (b)  Mandatory.  On December 31, 1993, as a mandatory redemption, the
Corporation shall redeem out of funds legally available therefor at the
redemption price of $100 per share plus an amount equal to accrued and unpaid
dividends thereon an amount of Series B Preferred Stock and the Series C
Preferred Stock at least equal to 66 2/3% of the Series B Preferred Stock and
66 2/3% of the Series C Preferred Stock then outstanding. On December 31, 
1994, as a  mandatory redemption, the Corporation shall redeem out of funds 
legally available therefor at the redemption price of $100 per share plus an 
amount equal to accrued and unpaid dividends thereon all then outstanding 
shares of the Series B Preferred Stock and the Series C Preferred Stock.

     The mandatory redemption price together with an amount equal to accrued
but unpaid dividends shall be paid to the holders of record on such date of
redemption. The Corporation shall give at least 20 days' but not more than 
60 days' prior written notice to each holder whose shares are to be redeemed.
In the case of the mandatory redemption at December 31, 1993, the shares to be
redeemed shall be selected pro rata to the holders thereof.

     (c)  General.  From and after any date on which shares of Series B
Preferred Stock or the Series C Preferred Stock (as the case amy be) are
redeemed by the Corporation, such shares shall no longer be deemed to be
outstanding, and all rights of holders of such shares shall cease and
terminate, except the right of the holders of such shares, upon surrender of
certificates therefor, to receive amounts to be paid hereunder.

     7.  Restrictions on Transfer.  The shares of Series B Preferred Stock and
the Series C Preferred Stock may not be sold, transferred, assigned or
hypothecated unless such sale, transfer, assignment or hypothecation is made
pursuant to an effective registration statement under the Securities Act of
1933, as amended, or the Corporation receives an opinion of counsel, reasonably
satisfactory to the Corporation, stating that such sale, transfer, assignment
or hypothecation is exempt from the registration and prospectus delivery
requirements of such Act. Each certificate representing shares of Series B
Preferred Stock and the Series C Preferred Stock shall bear a legend to the
foregoing effect unless the Corporation shall have received an opinion of
counsel, reasonably staisfactory to the Corporation, to the effect that such
legend may be removed under such Act.

     8.  Staus of Reacquired Shares.  Shares of the Series B Preferred Stock
and the Series C Preferred Stock which have been issued and reacquired or
redeemed in any manner shall (upon compliance with any applicable provisions of
the laws of the State of Delaware) have the status of authorized and unissued
shares of the Series B Preferred Stock or the Series C Preferred Stock (as the
case may be) issuable in the same series designated hereby.

     9.  Exclusion of Other Rights.  Except as may otherwise be required by
law, the shares of the Series B Preferred Stock and the Series C Preferred
Stock shall not have any preference or relative, participating, optional or
other special rights, other than those specifically set forth in this Restated
Certificate of Incorporation (as it may be amended from time to time). The
shares of the

<PAGE>   9

Series B Preferred Stock and the Series C Preferred Stock shall have no
preemptive or subscription rights.

     B.  Common Stock.  Except as provided in paragraph A of this Article
Fourth and as otherwise required by law or as otherwise provided in any
Preferred Stock Designation, the holders of the Common Stock shall exclusively
possess all voting power, and each share of Common Stock shall have one vote.

     FIFTH:  A.  Number, election and terms of directors.  Subject to the
rights of the holders of any series of Preferred Stock to elect additional
directors under specified circumstances, the number of directors shall be fixed
from time to time exclusively by the Board of Directors.

     B.  Stockholder nomination of director candidates and introduction of
business.  Advance notice of stockholder nominations for the election of
directors and of business to be brought by stockholders before any meeting of
the stockholders of the Corporation shall be given in the manner provided in
the Bylaws of the Corporation.  

     C.  Newly created directorships and vacancies.  Subject to the rights of
the holders of any series of Preferred Stock, and unless the Board of Directors
otherwise determines, newly created directorships resulting from any increase
in the authorized number of directors or any vacancies in the Board of
Directors resulting from death, resignation, retirement, disqualification,
removal from office or other cause may be filled only by a majority vote of the
directors then in office, though less than a quorum, and directors so chosen
shall hold office for a term expiring at the next annual meeting of
stockholders and until such director's successor shall have been duly elected
and qualified.

     SIXTH:  The Board of Directors is expressly authorized to adopt, amend or
repeal the Bylaws of the Corporation. Election of directors need not be by
ballot.

     SEVENTH:  No director of the Corporation shall be liable to the
Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director; except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) under Section 174 of the Delaware General
Corporation Law, or (iv) for any transaction from which the director derived
an improper personal benefit.

     If the Delaware General Corporation Law hereafter is amended to authorize
the further elimination or limitation of the liability of directors, then the
liability of a director of the Corporation, in addition to the limitation on
personal liability provided herein, shall be limited to the fullest extent
permitted by the amended Delaware General Corporation Law. Any repeal or
modification of this paragraph by the stockholders of the Corporation shall be
prospective only, and shall not adversely affect any limitation of the personal
liability of a director of the Corporation existing at the time of such repeal
or modification.

     EIGHTH:  Any (a) stockholder of the Corporation, (b) affiliate, partner,
stockholder or other person having a financial interest in any such stockholder
of the Corporation or (c) officer, director or employee of the Corporation in
his capacity as a stockholder, partner or other person having a financial
interest in, or as an officer, director or employee of any person or entity
referred to in clauses (a) and (b) above (persons and entities referred to in
clauses (a), (b) and (c) above being herein collectively referred to as "Related
Persons"), may engage in or possess an interest in other business ventures of
every nature and description, independently or with others, whether such
ventures are competitive with the Corporation or otherwise, and neither the
Corporation nor its stockholder shall have any right in or to such independent
ventures or to the income or profits derived thereform except as may otherwise
be required by law to the extent that (i) the other business venture involves a
contract or transaction which was offered to such Related Person in its
capacity as the Corporation's agent and wrongfully appropriated by it; or 
(ii) the Corporation had an enforceable legal interest in the contract or
transaction at the time it was initially offered to such Related Person; or
(iii) such Related Person made substantial use of the assets, personnel,
facilities or resources of the Corporation in obtaining or developing a
contract or transaction for its benefit; or (iv) a contract or transaction was
otherwise the property of the Corporation and was neither entered into nor
engaged 

<PAGE>   10
in in connection with an ongoing business enterprise owned or operated by a
Related Person nor involved the acquisition of such a business enterprise by a
Related Person.

        (b) The existence or presence of one or more of the factors set forth
in subparagraph (a) above shall not conclusively entitle the Corporation to the
benefit of a contract or transaction referred to therein.

        NINTH:  Whenever the vote of stockholders at a meeting thereof is
required or permitted to be taken for or in connection with any corporate
action by any provisions of the statutes or of the Certificate of
Incorporation, the meeting and vote of stockholders may be dispensed with if
the stockholders having not less than a majority of all shares entitled to vote
if such meeting were held shall consent in writing to such corporate action
being taken.

        TENTH: The Corporation reserves the right to amend, alter, change or
repeal any provision contained in this Restated Certificate of Incorporation,
and any other provisions authorized by the laws of the State of Delaware at the
time in force may be added or inserted, in the manner now or hereafter provided
herein or by statute, and all rights, preferences and privileges of whatsoever
nature conferred upon stockholders, directors or any other persons whomsoever
by and pursuant to this Restated Certificate of Incorporation in its present
form or as amended are granted subject to the rights reserved in this Article.

        IN WITNESS WHEREOF, this Restated Certificate of Incorporation, which
restates and integrates and further amends the provisions of the Restated
Certificate of Incorporation of this Corporation and reclassifies certain
series of Preferred Stock of the Corporation and has been duly adopted in
accordance with Sections 242 and 245 of the General Corporation Law of the State
of Delaware, has been executed by its Chief Executive Officer and attested by
its Secretary on this the 30th day of September, 1987.


                                       UNION TEXAS PETROLEUM HOLDINGS, INC.    



                                       By:      /s/  A. CLARK JOHNSON
                                           ------------------------------------
                                                     A. Clark Johnson
                                                 Chief Executive Officer



ATTEST:

     /s/ NEWTON W. WILSON,III
- ---------------------------------
         Newton W. Wilson,III
             Secretary



                                                   -8-

<PAGE>   1
                                                                  EXHIBIT 99.1
                                                                  NEWS RELEASE
- -------------------------------------------------------------------------------

[UNION TEXAS PETROLEUM LOGO]


Contact: Carol L. Cox
         (713) 968-2714


                         UNION TEXAS PETROLEUM REPORTS RESULTS
                            OF ANNUAL STOCKHOLDER MEETING


     Houston, May 10, 1995 -- At Union Texas Petroleum Holdings, Inc.'s annual
stockholders meeting held this morning in Houston, stockholders re-elected the
company's 11 members of its Board of Directors to one-year terms expiring in
1996. The directors include A. Clark Johnson, Chairman and Chief Executive
Officer of Union Texas; Glen A. Cox, retired President and Chief Operating
Officer of Phillips Petroleum Company; Saul A. Fox, Partner of Kohlberg Kravis
Roberts & Co. (KKR); Edward A. Gilhuly, Partner of KKR; James H. Greene Jr.,
Partner of KKR; Henry R. Kravis, Partner of KKR; Michael W. Michelson, Partner
of KKR; Stanley P. Porter, retired Vice Chairman of Arthur Young & Company;
George R. Roberts, Partner of KKR; Richard R. Shinn, retired Executive Vice
Chairman of the New York Stock Exchange and retired Chairman and CEO of
Metropolitan Life Insurance Company; and Sellers Stough, retired Vice
President-Finance of Chevron Corporation.
     The stockholders ratified the appointment of Price Waterhouse as
independent accountants. The stockholders also approved the amendment of the
company's restated certificate of incorporation to provide for a new class of
preferred stock, the 1994 incentive plan and the amendment of Union Texas' 1992
stock option plan.
     One of the largest independent producers located in the U.S.,
Houston-based Union Texas Petroleum Holdings, Inc. (NYSE: UTH) explores for and
produces oil and gas overseas primarily in the U.K. North Sea, Indonesia and
other strategic areas. The company has petrochemical operations in Louisiana.




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