FRONTIER OIL CORP /NEW/
8-K, 1999-11-19
PETROLEUM REFINING
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                                 UNITED STATES

                     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): NOVEMBER 12, 1999



                            FRONTIER OIL CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)



         WYOMING                       001-07627                74-1895085
 (STATE OR OTHER JURISDICTION    (COMMISSION FILE NUMBER)    (I.R.S. EMPLOYER
       OF INCORPORATION)                                    IDENTIFICATION NO.)



                        10000 MEMORIAL DRIVE, SUITE 600
                           HOUSTON, TEXAS  77024-3411
              (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)  (ZIP CODE)



      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:  (713) 688-9600



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ITEM 5.  OTHER EVENTS

     Attached as Exhibit 1.1 is the Underwriting Agreement dated November 5,
1999 among Frontier Oil Corporation (the "Company"), Bear, Stearns & Co. Inc.,
Lehman Brothers Inc. and Warburg Dillon Read LLC relating to the offering of
$190,000,000 aggregate principal amount of the Company's 11 3/4% Senior Notes
due 2009 (the "Notes"), registered pursuant to a Registration Statement on Form
S-3 (Registration No. 333-80253), as supplemented by the Prospectus Supplement,
dated November 5, 1999.

     Attached as Exhibit 4.1 is the Indenture dated as of November 12, 1999,
among the Company and Chase Bank of Texas, National Association, as trustee,
governing the Notes.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS

         (c)  Exhibits

         1.1 Underwriting Agreement dated November 5, 1999 among Frontier Oil
             Corporation, Bear, Stearns & Co. Inc., Lehman Brothers Inc. and
             Warburg Dillon Read LLC.

         4.1 Indenture dated as of November 12, 1999, among the Company and
             Chase Bank of Texas, National Association, as trustee.

         4.2 Form of Frontier Oil Corporation 11 3/4% Senior Note due 2009.
             (Included in Exhibit 4.1).
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                                   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.



                              FRONTIER OIL CORPORATION



                              By: /s/ Julie H. Edwards
                                 ----------------------------------------
                                    Julie H. Edwards
                                    Senior Vice President--Finance and
                                    Chief Financial Officer



Date:  November 19, 1999
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                                 EXHIBIT INDEX



  Exhibit No.                 Description
  -----------                 -----------

     1.1       Underwriting Agreement dated November 5, 1999 among Frontier Oil
               Corporation, Bear, Stearns & Co. Inc., Lehman Brothers Inc. and
               Warburg Dillon Read LLC.



     4.1       Indenture dated as of November 12, 1999, among the Company and
               Chase Bank of Texas, National Association, as trustee.



     4.2       Form of Frontier Oil Corporation 11 3/4% Senior Note due 2009.
               (Included in Exhibit 4.1).

<PAGE>

                                                                     EXHIBIT 1.1

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                            FRONTIER OIL CORPORATION



                                  $190,000,000

                         11 3/4% SENIOR NOTES DUE 2009



                             UNDERWRITING AGREEMENT

                                NOVEMBER 5, 1999



                            BEAR, STEARNS & CO. INC.
                                LEHMAN BROTHERS
                            WARBURG DILLON READ LLC



================================================================================
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                            FRONTIER OIL CORPORATION

                                  $190,000,000
                         11 3/4% SENIOR NOTES DUE 2009


                             UNDERWRITING AGREEMENT


                                                                November 5, 1999
                                                              New York, New York


BEAR, STEARNS & CO. INC.
LEHMAN BROTHERS
WARBURG DILLON READ LLC
  c/o Bear, Stearns & Co. Inc.
  245 Park Avenue
  New York, New York  10167

Ladies & Gentlemen:

     Frontier Oil Corporation, a Wyoming corporation (the "Company"), proposes
to issue and sell to Bear, Stearns & Co. Inc., Lehman Brothers and Warburg
Dillon Read LLC (the "Underwriters") $190,000,000 aggregate principal amount of
its 11 3/4% Senior Notes due 2009 (the "Notes"), subject to the terms and
conditions set forth herein (the "Offering").  The Notes will be issued pursuant
to an indenture (the "Indenture"), to be dated the Closing Date (as defined
below), among the Company and Chase Bank of Texas, National Association, as
trustee (the "Trustee"). Capitalized terms used herein and not otherwise defined
shall have the meanings assigned to such terms in the Indenture.

     On the Closing Date, simultaneously with the closing of the Offering, the
Company will acquire the El Dorado refinery and related assets from Equilon
Enterprises LLC (the "El Dorado Acquisition") pursuant to an asset purchase and
sale agreement as described in the Prospectus (as defined below) under the
heading "Summary--The Transaction."  In the event that the El Dorado Acquisition
is not consummated simultaneously with the closing of the Offering, the gross
proceeds of the Offering, before deducting for discounts and commissions to the
Underwriters, along with additional cash to be deposited by the Company with
Chase Bank of Texas, National Association, as escrow agent (the "Escrow Agent"),
will be placed in an escrow account (the "Escrow Account") in accordance with an
Escrow Agreement, dated as of the date of the Indenture, by and among the
Company, the Trustee and the Escrow Agent (the "Escrow Agreement").  The funds
in the Escrow Account will be released on or before January 11, 2000 either to
finance the El Dorado Acquisition or to satisfy the Special Mandatory Redemption
(as defined in the Indenture).  This Agreement, the Notes, the Indenture and the
Escrow Agreement are hereinafter referred to collectively as the "Operative
Documents."

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     1.   AGREEMENTS TO SELL AND PURCHASE.  On the basis of the representations
and warranties contained in this Agreement, and subject to its terms and
conditions, the Company agrees to issue and sell, and each Underwriter agrees,
severally and not jointly, to purchase from the Company the principal amount of
Notes set forth opposite the name of such Underwriter in Schedule I hereto.  The
purchase price for the Notes will be $955.62 per $1,000 principal amount of
Notes.  If the El Dorado Acquisition is not consummated simultaneously with the
closing of the Offering, and the gross proceeds are placed in the Escrow
Account, the Company will pay on the Closing Date an amount representing the
discounts and commissions directly to the Underwriters by wire transfer into an
account designated by the Underwriters.  In the event that a Special Mandatory
Redemption occurs, the Underwriters agree to repay the Company two-thirds of the
amounts paid to the Underwriters as discounts and commissions in connection with
the Offering.

     2.   OFFERING.  The Company has filed with the Securities and Exchange
Commission (the "Commission"), in accordance with the provisions of the
Securities Act of 1933, as amended, and the rules and regulations of the
Commission thereunder (the "Act"), a registration statement on Form S-3
(Registration no. 333-80253), including a related prospectus (the "Basic
Prospectus"), relating to the registration of certain senior debt securities,
including the Notes, and certain other securities to be sold from time to time
by the Company in accordance with Rule 415 of the Act.  A prospectus supplement
relating to the Notes, the terms of the offering thereof and the other matters
set forth therein has been prepared and will be filed pursuant to Rule 424(b) of
the Act.  Such prospectus supplement, in the form first filed on or after the
date hereof pursuant to Rule 424(b), is herein referred to as the "Prospectus
Supplement."  The registration statement, as amended at the date hereof,
including the exhibits thereto, is herein called the "Registration Statement,"
and the Basic Prospectus included therein, as supplemented by the Prospectus
Supplement, is herein called the "Prospectus;" provided, however, that if such
Prospectus is amended or supplemented on or after the date hereof but prior to
the date on which the Prospectus Supplement is first filed pursuant to Rule
424(b), the term "Prospectus" shall refer to such Prospectus as so amended or
supplemented and as supplemented by the Prospectus Supplement; and provided,
further, that all references to the "Registration Statement" and the
"Prospectus" shall be deemed to include all documents incorporated therein by
reference pursuant to the Securities Exchange Act of 1934, as amended (the
"Exchange Act").  If an abbreviated registration statement is prepared and filed
with the Commission in accordance with Rule 462(b) under the Act (an
"Abbreviated Registration Statement"), the term "Registration Statement" as used
in this Agreement includes the Abbreviated Registration Statement. For purposes
of this Agreement, the words "amend," "amendment," "amended," "supplement" or
"supplemented" with respect to the Registration Statement or the Prospectus
shall mean amendments or supplements to the Registration Statement or the
Prospectus, as the case may be, as well as documents filed after the date of
this Agreement and prior to the completion of the distribution of the Notes and
incorporated by reference therein as described above.  As used in this
Agreement, "Effective Date" means the date the Registration Statement, or the
most recent post-effective amendment thereto, if any, was declared effective by
the Commission.

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     3.   DELIVERY AND PAYMENT.

          Delivery of the Notes shall be made, against payment of the purchase
price therefor, at the offices of Andrews & Kurth L.L.P., Chase Tower, 600
Travis, Suite 4200, Houston, Texas 77002, or such other location as may be
mutually acceptable.  Such delivery and payment shall be made at 10:00 a.m., New
York City time, on November 12, 1999 or at such other time as shall be agreed
upon by the Underwriters and the Company.  The time and date of such delivery
and payment are herein called the "Closing Date."  On the Closing Date, one or
more Notes in definitive global form, registered in the name of Cede & Co., as
nominee of The Depository Trust Company ("DTC"), having an aggregate amount
corresponding to the aggregate principal amount of the Notes sold to the
Underwriters (the "Global Note") shall be delivered by the Company to Bear,
Stearns & Co. Inc., as agent for the Underwriters, against payment by the
Underwriters of the purchase price therefor, by wire transfer, in same-day
funds, (A) to an account designated by the Company if the El Dorado Acquisition
is consummated on the Closing Date, provided that the Company shall give at
least two business days' prior written notice to Bear, Stearns & Co. Inc. of the
information required to effect such wire transfer, or (B) if the El Dorado
Acquisition is not consummated on the Closing Date, to the Escrow Account.  The
Global Note shall be made available to Bear, Stearns & Co. Inc. for inspection
not later than 9:30 a.m. on the business day immediately preceding the Closing
Date.

     4.   AGREEMENTS OF THE COMPANY.  The Company covenants and agrees with the
Underwriters as follows:

          (a) The Company will timely transmit copies of the Prospectus, and any
amendments or supplements thereto, as applicable, to the Commission for filing
pursuant to Rule 424(b) of the Act.

          (b) To advise the Underwriters promptly (confirming such advice in
writing) of any official request made by the Commission for amendments to the
Registration Statement or the Prospectus or for additional information with
respect thereto, of official notice of institution of proceedings for, or the
entry of, any stop order or any other order suspending the effectiveness of the
Registration Statement or preventing or suspending the use of any preliminary
prospectus supplement or the Prospectus, or of the suspension of qualification
of the Notes for offering or sale in any jurisdiction or of the initiation or
threatening of any proceeding for any such purpose and, if such a stop order
should be entered by the Commission or any other order preventing or suspending
the use of any preliminary prospectus supplement or the Prospectus or suspending
any such qualification should be issued, to use promptly its reasonable efforts
to obtain the lifting, removal or withdrawal thereof as soon as possible.

          (c) If at any time when a Prospectus relating to the Notes is required
to be delivered under the Act any event shall have occurred as a result of which
the Prospectus as then amended or supplemented would, in the judgment of the
Underwriters or the Company, include an untrue statement of a material fact or
omit to state any 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, or if it shall be necessary at any time to amend or
supplement the Registration Statement or the Prospectus to comply with the Act,
or to file under the Exchange Act, so as to

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comply with the Exchange Act or the Act, any document incorporated by reference
in the Registration Statement or the Prospectus or in any amendment thereof or
supplement thereto, to notify the Underwriters promptly and prepare and file,
with the Commission an appropriate amendment or supplement (in form and
substance satisfactory to the Underwriters) which will correct such misstatement
or omission or which will effect such compliance and to use its best efforts to
have any amendment to the Registration Statement declared effective as soon as
possible.

          (d) To the extent not previously furnished to the Underwriters,  to
promptly furnish them with one signed and three conformed copies of the
Registration Statement, as initially filed with the Commission, including all
amendments thereto, and of all documents incorporated therein (including all
exhibits filed therewith, other than exhibits which have previously been
furnished to the Underwriters and exhibits incorporated by reference in such
documents).

          (e) To furnish the Underwriters, counsel for the Underwriters and
those persons identified by the Underwriters, without charge, as many copies of
the preliminary prospectus supplement and the Prospectus and any amendments or
supplements thereto, as the Underwriters may reasonably request.  The Company
consents to the use of the preliminary prospectus supplement and the Prospectus,
and any amendments and supplements thereto, by the Underwriters.

          (f) Not to amend or supplement the Registration Statement or
Prospectus, or file a document under the Exchange Act if such document would be
deemed to be incorporated by reference in the Prospectus, prior to the Closing
Date unless the Underwriters and the Underwriters' counsel shall previously have
been advised thereof and shall not have objected thereto in good faith within a
reasonable time, which shall not in any case be longer than three full business
days after the receipt of  a copy thereof.  The Company shall promptly prepare,
upon the Underwriters' request, any amendment or supplement to the preliminary
prospectus supplement or the Prospectus that may be necessary or advisable.

          (g) As soon as practicable but no later than 45 days after the end of
the fiscal quarter (or 90 days if such fiscal quarter is the fourth fiscal
quarter) in which the first anniversary date of the "effective date" (as the
term "effective date" is defined in Rule 158 under the Act) of the Registration
Statement falls, to make generally available to its security holders an earnings
statement of the Company and its Subsidiaries (as contemplated by Section 11(a)
and, including, at the Company's option, Rule 158 under the Act) covering a
period of at least 12 months after the Effective Date of the Registration
Statement.

          (h) Whether or not the transactions contemplated by this Agreement are
consummated or this Agreement becomes effective or is terminated, to pay all
costs, expenses, fees and taxes incident to the performance of the obligations
of the Company hereunder, including in connection with:  (i) the preparation,
printing, filing and distribution of the Registration Statement, as originally
filed and all amendments thereof (including all exhibits thereof), any
preliminary prospectus supplement and the Prospectus and any amendments or
supplements thereto required pursuant hereto and delivery of all other
agreements, memoranda, correspondence and all other documents prepared and
delivered in connection herewith, (ii) the issuance, transfer and delivery by
the Company of the Notes to the Underwriters, (iii) furnishing such copies of
the preliminary

                                       4
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prospectus supplement and the Prospectus, and all amendments and supplements
thereto, as may be requested, (iv) the preparation of certificates for the Notes
(including, without limitation, printing and engraving thereof), (v) the fees,
disbursements and expenses of the Company's counsel and accountants, (vi) all
fees and expenses (including fees and expenses of counsel) of the Company in
connection with the approval of the Notes by DTC for "book-entry" transfer,
(vii) rating the Notes by rating agencies, (viii) the reasonable fees and
expenses of the Trustee and its counsel, (ix) the performance by the Company of
its other obligations under this Agreement and the other Operative Documents,
(x) filing fees of the Commission and the National Association of Securities
Dealers, Inc. (the "NASD"), if any, and (xi) "roadshow" travel and other
expenses incurred by the Company in connection with the marketing and sale of
the Notes; provided, however, except as provided in this Section 4(h) and in
Section 11(d), the Underwriters shall pay their own costs and expenses
(including the costs and expenses of their counsel).

          (i) To use the proceeds from the sale of the Notes in the manner
described in the Prospectus under the heading "Use of Proceeds."

          (j) Not to voluntarily claim, and to resist actively any attempts to
claim, the benefit of any usury laws against the holders of any Notes.

          (k) To comply with all of its agreements set forth in this Agreement
and the other Operative Documents to which it is a party and all agreements set
forth in the representation letter of the Company to DTC relating to the
approval of the Notes by DTC for "book-entry" transfer.

          (l) To use reasonable best efforts to obtain approval of the Notes by
DTC for "book-entry" transfer.

          (m) For a period of five years commencing on the Closing Date, to
deliver without charge to the Underwriters, as they may reasonably request,
promptly upon their becoming available, copies of (i) all reports or other
information that the Company shall mail or otherwise make available to its
security holders and (ii) all reports, financial statements and proxy or
information statements filed by the Company with the Commission or any national
securities exchange and such other publicly available information concerning the
Company or any of its Subsidiaries.

          (n) Not to take, directly or indirectly, any action designed to, or
that 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 Notes.  Except as permitted by the Act, the Company shall not
distribute any (i) preliminary prospectus supplement, (ii) prospectus,
including, without limitation, the Prospectus or (iii) other offering material
in connection with the offering and sale of the Notes.

          (o) Prior to the Closing Date, not to permit any change in the capital
stock or material change in the short-term debt or long-term debt of the Company
or any of its Subsidiaries, or any material adverse change, or any development
involving a prospective material adverse change, in or affecting the general
affairs, management, financial position, shareholders' equity or

                                       5
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results of operations of the Company or any of its Subsidiaries, otherwise than
as set forth or contemplated in the Prospectus, which are or is within the
Company's control or power.

          (p) To cause the Indenture to be duly authorized by the Company and to
be qualified under the Trust Indenture Act of 1939, as amended, and the rules
and regulations thereunder (collectively called the "Trust Indenture Act").

          (q) During the period beginning from the date of this Agreement and
continuing to and including the later of (i) the termination of trading
restrictions on the Notes, as notified to the Company by the Underwriters, and
(ii) the Closing Date, the Company will not offer, sell, contract to sell or
cause to be offered, sold or contracted to sell, or otherwise dispose of any
debt securities of the Company which are substantially similar to the Notes,
without the prior written consent of Bear, Stearns & Co. Inc.

          (r) The Company, during the period when the Prospectus is required to
be delivered under the Act or the Exchange Act, will file all documents required
to be filed with the Commission pursuant to Section 13, 14 or 15 of the Exchange
Act within the time periods required by the Exchange Act.

     5.   REPRESENTATIONS AND WARRANTIES.

          The Company represents and warrants to the Underwriters that:

          (i) The Registration Statement (A) has been prepared by the Company in
  conformity with the requirements of the Act and the Trust Indenture Act and
  (B) has been filed with the Commission under the Act.  Such Registration
  Statement has become effective under the Act.  If any post-effective amendment
  to such Registration Statement has been filed with the Commission prior to the
  date hereof, the most recent such amendment has been declared effective by the
  Commission.  Copies of such Registration Statement and any amendments thereto
  have been delivered by the Company to the Underwriters.  The Prospectus
  relating to the Notes, the terms of the offering thereof and the other matters
  set forth therein has been prepared and has been or will be filed pursuant to
  Rule 424(b) under the Act within the time period prescribed thereby.  The
  Commission has not issued any order suspending the effectiveness of the
  Registration Statement, and no such stop order has been initiated or
  threatened by the Commission.

          (ii)  The Registration Statement, at the Effective Date, complied in
  all material respects and the Prospectus, when first filed pursuant to Rule
  424(b) under the Act and at the Closing Date, complied and will comply in all
  material respects, with the provisions of the Act; the Registration Statement,
  at the Effective Date, 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 not misleading; the Prospectus, at its issue date
  and at the Closing Date, did not 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, in the light of the circumstances
  under which they were made, not

                                       6
<PAGE>

  misleading; the documents incorporated by reference in the Prospectus or
  deemed to be incorporated by reference in the Prospectus, at the time they
  were or are filed with the Commission, complied or will comply in all material
  respects with the requirements of the Exchange Act, and did not or 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, in the light of the circumstances under which they are made, not
  misleading; the Indenture, at the Closing Date, conformed and will conform in
  all material respects with the requirements of the Trust Indenture Act and has
  been duly qualified under the Trust Indenture Act; provided, however, that the
  Company makes no warranty or representation with respect to any statement
  contained in, or any matter omitted from, the Registration Statement or the
  Prospectus in reliance upon and in conformity with information furnished in
  writing by or on behalf of any Underwriter through Bear, Stearns & Co. Inc. to
  the Company expressly for use with reference to such Underwriter in the
  Registration Statement or the Prospectus.

          (iii)  The Company and each of the following subsidiaries, Frontier
  Holdings Inc., Frontier Refining & Marketing Inc., Frontier Oil and Refining
  Company, Frontier Pipeline Inc., Frontier Refining Inc. and Frontier El Dorado
  Refining Company (the "Subsidiaries"), (A) has been duly organized and is
  validly existing as a corporation in good standing under the laws of its
  jurisdiction of incorporation, (B) has all requisite corporate power and
  authority to carry on its business as it is currently being conducted and as
  described in the Prospectus and to own, lease and operate its properties and
  (C) is duly qualified and in good standing as a foreign corporation,
  authorized to do business in each jurisdiction in which the nature of its
  business or its ownership or leasing of property requires such qualification,
  except where the failure to be so qualified could not reasonably be expected
  to (x) result, individually or in the aggregate, in a material adverse effect
  on the properties, business, results of operations or condition (financial or
  otherwise) of the Company and the Subsidiaries, taken as a whole, (y)
  interfere with or adversely affect the issuance or marketability of the Notes
  or (z) in any manner draw into question the validity of this Agreement or any
  other Operative Document or the transactions described in the Prospectus under
  the heading "Use of Proceeds" (any of the events set forth in clauses (x), (y)
  or (z), a "Material Adverse Effect").

          (iv)  All of the outstanding shares of capital stock or other
  securities evidencing equity securities of the Company have been duly
  authorized, validly issued and are fully paid and nonassessable, were issued
  in compliance with all applicable federal and state securities laws and were
  not issued in violation of any preemptive or similar rights.  On June 30,
  1999, as adjusted to give effect to the offering of the Notes, borrowings
  under the Frontier Credit Facility and the application of the net proceeds
  therefrom, the Company would have had an authorized and outstanding
  capitalization as set forth in the Prospectus in the "As Adjusted" column
  under the heading "Capitalization," subject to the notes and assumptions
  included therein.

          (v) All of the outstanding capital stock of each of the Subsidiaries
  is owned, directly or indirectly, by the Company, free and clear of any
  security interest, claim,

                                       7
<PAGE>

  lien, encumbrance, restriction on transfer, limitation on voting rights or
  other defect of title whatsoever, except pursuant to a pledge of the
  securities under the Company's $175 million credit facility, led by Union Bank
  of California N.A. and Paribas to be dated the Closing Date (the "Frontier
  Credit Facility"); and all such securities have been duly authorized, validly
  issued and are fully paid and nonassessable and were not issued in violation
  of any preemptive or similar rights. Except for the shares of stock of each
  Subsidiary owned by the Company and its interest in the Centennial Pipeline,
  neither the Company nor any Subsidiary owns, directly or indirectly, any
  shares of capital stock of any corporation or has any equity interest in any
  firm, partnership, joint venture or other entity.

          (vi)  Except as disclosed in the Prospectus, there are not currently
  any outstanding subscriptions, rights, warrants, calls, commitments of sale or
  options to acquire, or instruments convertible into or exchangeable for, any
  capital stock or other equity interest of the Company or any of its
  Subsidiaries.

          (vii)  The Company has all requisite corporate power and authority to
  execute, deliver and perform its obligations under this Agreement and each of
  the other Operative Documents to which it is a party and to consummate the
  transactions contemplated hereby and thereby, including, without limitation,
  the corporate power and authority to issue, sell and deliver the Notes.

          (viii)  This Agreement has been duly and validly authorized, executed
                  and delivered by the Company.

          (ix) The Indenture has been duly and validly authorized by the Company
  and, when duly executed and delivered by the Company, will be the legal, valid
  and binding obligation of the Company, enforceable against it in accordance
  with its terms, subject to applicable bankruptcy, insolvency, fraudulent
  conveyance, reorganization, moratorium or similar laws affecting the rights of
  creditors generally and subject to general principles of equity (whether
  considered in a proceeding in equity or at law) and provided that rights to
  indemnification and arbitration thereunder may be limited by federal or state
  securities laws or public policy relating thereto.  The Indenture conforms in
  all material respects to the description thereof in the Prospectus.

          (x) The Escrow Agreement has been duly and validly authorized by the
  Company and, if and when duly executed and delivered by the Company, will be
  the legal, valid and binding agreement of the Company, enforceable against it
  in accordance with its terms, subject to applicable bankruptcy, insolvency,
  fraudulent conveyance, reorganization, moratorium or similar laws affecting
  the rights of creditors generally and subject to general principles of equity
  (whether considered in a proceeding in equity or at law).  The Escrow
  Agreement conforms in all material respects to the description thereof in the
  Prospectus.

          (xi)  The Notes have been duly and validly authorized by the Company
  for issuance and sale to the Underwriters pursuant to this Agreement and, when
  issued and authenticated in accordance with the terms of the Indenture and
  delivered against payment

                                       8
<PAGE>

  therefor in accordance with the terms hereof and thereof, will be the legal,
  valid and binding obligations of the Company, enforceable against it in
  accordance with their terms and entitled to the benefits of the Indenture,
  subject to applicable bankruptcy, insolvency, fraudulent conveyance,
  reorganization, moratorium or similar laws affecting the rights of creditors
  generally and subject to general principles of equity (whether considered in a
  proceeding in equity or at law). The Notes, when issued, authenticated and
  delivered, will conform in all material respects to the description thereof in
  the Prospectus.

          (xii) Each of the Company and the Subsidiaries is not and, after
  giving effect to the Offering, will not be, (A) in violation of its charter or
  bylaws, (B) in default in the performance of any bond, debenture, note,
  indenture, mortgage, deed of trust or other agreement or instrument to which
  it is a party or by which it is bound or to which any of its properties is
  subject, or (C) except as described in the Prospectus, in violation of any
  local, state, federal or foreign law, statute, ordinance, rule, regulation,
  requirement, judgment or court decree (including, without limitation,
  environmental laws, statutes, ordinances, rules, regulations, judgments or
  court decrees) applicable to it or any of its assets or properties (whether
  owned or leased), except, in the case of clause (B) or (C), where such event
  could not reasonably be expected to have a Material Adverse Effect. To the
  best knowledge of the Company, there exists no condition that, with notice,
  the passage of time or otherwise, would constitute a default under any such
  document or instrument, which default could reasonably be expected to have a
  Material Adverse Effect.

          (xiii)  None of (A) the execution, delivery or performance by the
  Company of this Agreement or any of the other Operative Documents to which it
  is a party, (B) the issuance and sale of the Notes or (C) the consummation by
  the Company of the transactions described in the Prospectus under the heading
  "Use of Proceeds," violates, conflicts with or constitutes a breach of any of
  the terms or provisions of, or will violate, conflict with or constitute a
  breach of any of the terms or provisions of, or a default under (or an event
  that with notice or the lapse of time, or both, would constitute a default
  under), or require consent under, or result in the imposition of a lien or
  encumbrance on any properties of the Company or any of the Subsidiaries, or an
  acceleration of any indebtedness of the Company or any of the Subsidiaries
  pursuant to (1) the charter or bylaws of the Company or any of the
  Subsidiaries, (2) any bond, debenture, note, indenture, mortgage, deed of
  trust or other agreement or instrument to which the Company or any of the
  Subsidiaries is a party or by which any of them or their property is or may be
  bound, (3) any statute, rule or regulation applicable to the Company or any of
  the Subsidiaries or any of their assets or properties or (4) any judgment,
  order or decree of any court or governmental agency or authority having
  jurisdiction over the Company or any of the Subsidiaries or any of their
  assets or properties, except, in the case of clause (2), (3) or (4), where
  such event could not reasonably be expected to have a Material Adverse Effect.
  No consent, approval, authorization or order of, or filing, registration,
  qualification, license or permit of or with, (A) any court or governmental
  agency, body or administrative agency or (B) any other person is required for
  (1) the execution, delivery and performance by the Company of this Agreement
  or any of the other Operative Documents to which it is a party, (2) the
  issuance and sale of the Notes or (3) the consummation of the transactions
  described in the Prospectus under the heading "Use

                                       9
<PAGE>

  of Proceeds," except such as have been obtained and made under the Act, the
  Trust Indenture Act, or such as may be required by the NASD.

          (xiv) There is (A) no action, suit, investigation or proceeding before
  or by any court, arbitrator or governmental agency, body or official, domestic
  or foreign, now pending or, to the best knowledge of the Company, threatened
  or contemplated to which the Company or any of the Subsidiaries is a party or
  to which the business or property of the Company or any of the Subsidiaries,
  is subject, (B) no statute, rule, regulation or order that has been enacted,
  adopted or issued by any governmental agency or that has been proposed by any
  governmental body and (C) no injunction, restraining order or order of any
  nature by a federal or state court or foreign court of competent jurisdiction
  to which the Company or any of the Subsidiaries is subject or to which the
  business, assets, or property of either the Company or any of the Subsidiaries
  is subject, that, in the case of clauses (A), (B) and (C) above, (1) is
  required to be disclosed in the Prospectus and that is not so disclosed or (2)
  could reasonably be expected to have a Material Adverse Effect.

          (xv)  Except as described in the Prospectus, neither the Company nor
  any of the Subsidiaries is a party to any union or collective bargaining
  agreement, and there is no significant strike, labor dispute, slowdown or
  stoppage pending against the Company or any of the Subsidiaries nor, to the
  knowledge of the Company, threatened against the Company or any of the
  Subsidiaries, except, in each case, as could not reasonably be expected to
  have a Material Adverse Effect.

          (xvi)  Except as described in the Prospectus, neither the Company nor
  any of the Subsidiaries has violated any foreign, federal, state or local law
  or regulation relating to the protection of human health and safety, the
  environment or hazardous or toxic substances or wastes, pollutants or
  contaminants ("Environmental Laws"), which could reasonably be expected to
  have a Material Adverse Effect.

          (xvii)  Each of the Company and the Subsidiaries has such permits,
  licenses, franchises and authorizations of governmental or regulatory
  authorities ("permits"), including, without limitation, under any applicable
  Environmental Laws, as are necessary to own, lease and operate their
  respective properties and to conduct their businesses, except where the
  failure to have such permits could not reasonably be expected to have a
  Material Adverse Effect; each of the Company and the Subsidiaries has
  fulfilled and performed all of its obligations with respect to such permits
  and no event has occurred which allows, or after notice or lapse of time would
  allow, revocation or termination thereof or could result in any other material
  impairment of the rights of the holder of any such permit, except as could not
  reasonably be expected to have a Material Adverse Effect; and, except as
  described in the Prospectus, such permits contain no restrictions that are or
  will be materially burdensome to the Company or such Subsidiary, as the case
  may be.

          (xviii)  Each of the Company and the Subsidiaries has (A) good and
  marketable title to all of the properties and assets described in the
  Prospectus as owned by it, free and clear of all liens, charges, encumbrances
  and restrictions (except for liens granted

                                       10
<PAGE>

  pursuant to the Frontier Credit Facility) and (B) peaceful and undisturbed
  possession under all material leases to which any of them is a party as lessee
  and each of which lease is valid and binding and no default exists thereunder,
  except for defaults that could not reasonably be expected to have a Material
  Adverse Effect. All material leases to which the Company or any of its
  Subsidiaries is a party are valid and binding and no default by the Company or
  such Subsidiary, as the case may be, has occurred and is continuing thereunder
  and, to the best knowledge of the Company, no material defaults by the
  landlord are existing under any such lease, except those defaults that could
  not reasonably be expected to have a Material Adverse Effect.

          (xix)  Except as disclosed in the Prospectus, each of the Company and
  the Subsidiaries owns, possesses or has the right to employ all patents,
  patent rights, licenses, inventions, copyrights, know-how (including trade
  secrets and other unpatented and/or unpatentable proprietary or confidential
  information, software, systems or procedures), trademarks, service marks and
  trade names, inventions, computer programs, technical data and information
  (collectively, the "Intellectual Property") presently employed by it in
  connection with the businesses now operated by it, or that are proposed to be
  operated by it, free and clear of and without violating any right, claimed
  right, charge, encumbrance, pledge, security interest, restriction or lien of
  any kind of any other person (except for liens granted pursuant to the
  Frontier Credit Facility), and none of the Company or any of its Subsidiaries
  has received any notice of infringement of or conflict with asserted rights of
  others with respect to any of the foregoing.  The use of the Intellectual
  Property in connection with the business and operations of the Company or any
  of its Subsidiaries does not infringe on the rights of any person, except such
  infringements as could not reasonably be expected to have a Material Adverse
  Effect.

          (xx)  The Company and each of the Subsidiaries have (A) filed all
  federal, state and local and foreign tax returns that are required to be filed
  through the date hereof, and all such tax returns are true, complete and
  accurate in all material respects, or (B) received valid extensions thereof
  and have paid all taxes shown on such returns and all assessments received by
  them except where, in the case of state and local and foreign tax returns, the
  failure to file in clause (A), or extend the due date of or pay the same in
  clause (B), in the aggregate, could not reasonably be expected to have a
  Material Adverse Effect; the Company has no knowledge of any tax deficiency
  that has been or might be asserted against the Company or any of its
  Subsidiaries that could reasonably be expected to have a Material Adverse
  Effect; to the Company's best knowledge, all tax liabilities are adequately
  provided for on the consolidated books of the Company.

          (xxi)  Neither the Company nor any of the Subsidiaries is (i) an
  "investment company" or (ii) a company "controlled" by an "investment company"
  within the meaning of the Investment Company Act of 1940, as amended (the
  "Investment Company Act").

          (xxii) There are no contracts or other documents that are required to
  be filed as exhibits to the Registration Statement by the Act that have not
  been filed as exhibits to the Registration Statement.

                                       11
<PAGE>

          (xxiii) There are no holders of securities of the Company who, by
  reason of the execution by the Company of this Agreement or any other
  Operative Document or the consummation by the Company of the transactions
  contemplated hereby and thereby, have the right to request or demand that the
  Company register under the Act or analogous foreign laws and regulations
  securities held by them.

          (xxiv)  Each of the Company and the Subsidiaries maintains a system of
  internal accounting controls sufficient to provide reasonable assurance that:
  (A) transactions are executed in accordance with management's general or
  specific authorizations; (B) transactions are recorded as necessary to permit
  preparation of financial statements in conformity with generally accepted
  accounting principles and to maintain accountability for assets; (C) access to
  assets is permitted only in accordance with management's general or specific
  authorization; and (D) the recorded accountability for assets is compared with
  the existing assets at reasonable intervals and appropriate action is taken
  with respect thereto.

          (xxv) In accordance with customary industry practices, the Company and
  each of its Subsidiaries maintains insurance covering their properties,
  operations, personnel and business, insuring against such losses and risks as
  are consistent with industry practice to protect the Company and its
  Subsidiaries and their respective businesses.  Neither the Company nor any of
  its Subsidiaries has received notice from any insurer or agent of such insurer
  that substantial capital improvements or other expenditures will have to be
  made in order to continue such insurance.  All such insurance is outstanding
  and duly in force on the date hereof and will be outstanding and duly in force
  on the Closing Date.

          (xxvi)  Neither the Company nor any of the Subsidiaries has (A) taken,
  directly or indirectly, any action designed to, or that 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 Notes or
  (B) except as permitted by Regulation M under the Exchange Act, since the date
  of the Prospectus or the Registration Statement (1) sold, bid for, purchased
  or paid any person any compensation for soliciting purchases of the Notes or
  (2) paid or agreed to pay to any person any compensation for soliciting
  another to purchase any other securities of the Company or any of the
  Subsidiaries.

          (xxvii) The conditions for use of Form S-3, as set forth in the
  General Instructions thereto, have been satisfied.

          (xxviii)   None of the execution, delivery and performance of this
  Agreement, the issuance and sale of the Notes, the application of the proceeds
  from the issuance and sale of the Notes and the consummation of the
  transactions contemplated by the Company as set forth in the Prospectus, will
  violate Regulations T, U or X promulgated by the Board of Governors of the
  Federal Reserve System or analogous foreign laws and regulations.

          (xxix) Except as disclosed in the Registration Statement and the
  Prospectus, and any amendments or supplements thereto, no relationship, direct
  or indirect, exists between or among the Company or any of its Subsidiaries,
  on the one hand, and the

                                       12
<PAGE>

  directors, officers, shareholders, customers or suppliers of the Company or
  any of its Subsidiaries, on the other hand, which is required by the Act to be
  described in the Registration Statement and the Prospectus.

          (xxx)  The Company has (A) initiated a review and assessment of all
  areas within its and each of its Subsidiaries' business and operations
  (including those affected by suppliers, vendors and customers) that could be
  adversely affected by the "Year 2000 Problem" (that is, the risk that computer
  applications used by the Company or any of its Subsidiaries (or suppliers,
  vendors and customers) may be unable to recognize and perform properly date-
  sensitive functions involving certain dates prior to and any date after
  December 31, 1999), (B) developed a plan and timeline for addressing the Year
  2000 Problem on a timely basis and (C) to date, has implemented that plan in
  accordance with that timetable. Based on the foregoing, the Company believes
  that all computer applications (including those of the Company's suppliers,
  vendors and customers) that are material to its or any of its Subsidiaries'
  business and operations are reasonably expected on a timely basis to be able
  to perform properly date-sensitive functions for all dates before and after
  January 1, 2000 (that is, be "Year 2000 Compliant"), except to the extent that
  a failure to do so could not reasonably be expected to have a Material Adverse
  Effect.

          (xxxi)  The accountants who have certified the financial statements
  included as part of the Prospectus or incorporated by reference therein are
  independent accountants. The historical consolidated financial statements
  incorporated by reference in the Prospectus, together with related schedules
  and notes thereto, of the Company comply as to form in all material respects
  with the requirements applicable to registration statements on Form S-3 under
  the Act and present fairly in all material respects the financial condition,
  results of operations, shareholders' equity and cash flow and other
  information purported to be shown therein of the Company and its consolidated
  Subsidiaries at the dates and for the periods indicated.  Such financial
  statements have been prepared in accordance with generally accepted accounting
  principles applied on a consistent basis throughout the periods presented
  unless otherwise stated therein.  The pro forma financial statements included
  in the Prospectus have been prepared on a basis consistent with the historical
  statements of the Company incorporated by reference in the Prospectus, except
  for the pro forma adjustments specified therein, and give effect to
  assumptions made on a reasonable basis and present fairly in all material
  respects the historical and proposed transactions contemplated by this
  Agreement, the asset purchase and sale agreement relating to the El Dorado
  Acquisition and the other Operative Documents; and such pro forma financial
  statements comply as to form in all material respects with the applicable
  accounting requirements of Rule 11-02 of Regulation S-X of the Act.  The other
  financial and statistical information and data included in the Prospectus,
  derived from the historical and pro forma financial statements, are accurately
  presented in all material respects and are prepared on a basis consistent with
  the financial statements, historical and pro forma, included in the Prospectus
  or incorporated by reference therein and the books and records of the Company
  and the Subsidiaries, as applicable.  The pro forma financial information and
  the "Unaudited Pro Forma Consolidated Financial Information" included in the
  Prospectus that gives effect to the issuance of the Notes and borrowings under
  the Frontier Credit Facility, the application of

                                       13
<PAGE>

  the net proceeds therefrom and the other transactions and events specified
  therein have been properly compiled on the basis of the assumptions set forth
  with respect thereto.

          (xxxii) There are no contracts, indentures, mortgages, loan
  agreements, notes, leases or other agreements or instruments or other
  documents (collectively, "Documents") required to be described or referred to
  in the Prospectus other than those described or referred to therein; all
  descriptions of Documents in the Prospectus are accurate in all material
  respects and present fairly the information described therein.

          (xxxiii) Neither the Company nor any of the Subsidiaries intends to,
  nor does it believe that it will, incur debts beyond its ability to pay such
  debts as they mature. The present fair saleable value of the assets of each of
  the Company and the Subsidiaries exceeds the amount that it will be required
  to be paid on or in respect of its existing debts and other liabilities
  (including contingent liabilities) as they become absolute and matured. The
  assets of each of the Company and the Subsidiaries do not constitute
  unreasonably small capital to carry out its business as conducted or as
  proposed to be conducted. Upon the issuance of the Notes, the present fair
  saleable value of the assets of each of the Company and the Subsidiaries will
  exceed the amount that it will be required to be paid on or in respect of its
  existing debts and other liabilities (including contingent liabilities) as
  they become absolute and matured. Upon the issuance of the Notes, the assets
  of each of the Company and the Subsidiaries will not constitute unreasonably
  small capital to carry out its businesses as now conducted, including its
  capital needs, taking into account the projected capital requirements and
  capital availability.

          (xxxiv)   Other than as contemplated by this Agreement, there are no
  contracts, agreements or understandings between the Company or any of the
  Subsidiaries and any other person that would give rise to a valid claim
  against the Company or any of the Subsidiaries or the Underwriters for a
  brokerage commission, finder's fee or like payment in connection with the
  issuance, purchase and sale of the Notes.

          (xxxv)   Each certificate signed by any officer of the Company and
  delivered to the Underwriters or counsel for the Underwriters shall be deemed
  to be a representation and warranty by the Company to the Underwriters as to
  the matters covered thereby.

          (xxxvi) There exist no conditions that would constitute a default (or
  an event which with notice or the lapse of time, or both, would constitute a
  default) under the following agreements relating to the El Dorado Acquisition:
  the asset purchase and sale agreement, the refined products offtake agreement,
  the crude supply agreement, the cogeneration facility sub-sublease agreement
  and the terminal agreement (the "Acquisition Documents").

     The Company acknowledges that the Underwriters and, for purposes of the
opinions to be delivered to the Underwriters pursuant to Section 8 hereof,
counsel for the Company and counsel for the Underwriters, will rely upon the
accuracy and truth of the foregoing representations and hereby consents to such
reliance.

                                       14
<PAGE>

     6.   INDEMNIFICATION.

          (a)  The Company agrees to indemnify and hold harmless (i) the
Underwriters, (ii) each person, if any, who controls the Underwriters within the
meaning of Section 15 of the Act or Section 20(a) of the Exchange Act and (iii)
the respective officers, directors, partners, employees, representatives and
agents of the Underwriters or any controlling person to the fullest extent
lawful, from and against any and all losses, liabilities, claims, damages and
expenses whatsoever (including but not limited to reasonable attorneys' fees and
any and all expenses whatsoever incurred in investigating, preparing or
defending against any investigation or litigation, commenced or threatened, or
any claim whatsoever, and any and all amounts paid in settlement of any claim or
litigation), joint or several, to which they or any of them may become subject
under the Act, the Exchange Act or otherwise, insofar as such losses,
liabilities, claims, damages or expenses (or actions in respect thereof) arise
out of or are based upon any untrue statement or alleged untrue statement of a
material fact contained in the Registration Statement or the Prospectus, or in
any supplement thereto or amendment thereof, 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, in the light of the
circumstances under which they were made, not misleading; provided, however,
that the Company will not be liable in any such case to the extent, but only to
the extent, that any such loss, liability, claim, damage or expense arises out
of or is based upon any such untrue statement or alleged untrue statement or
omission or alleged omission made therein in reliance upon and in conformity
with written information relating to the Underwriters furnished to the Company
by or on behalf of the Underwriters expressly for use therein.  This indemnity
agreement will be in addition to any liability that the Company may otherwise
have, including under this Agreement.

          (b)  The Underwriters agree to indemnify and hold harmless (i) the
Company, (ii) each person, if any, who controls the Company within the meaning
of Section 15 of the Act or Section 20(a) of the Exchange Act and (iii) the
respective officers, directors, partners, employees, representatives and agents
of the Company or any controlling person to the fullest extent lawful, from and
against any losses, liabilities, claims, damages and expenses whatsoever
(including but not limited to reasonable attorneys' fees and any and all
expenses whatsoever incurred in investigating, preparing or defending against
any investigation or litigation, commenced or threatened, or any claim
whatsoever and any and all amounts paid in settlement of any claim or
litigation), joint or several, to which it or any of them may become subject
under the Act, the Exchange Act or otherwise, insofar as such losses,
liabilities, claims, damages or expenses (or actions in respect thereof) arise
out of or are based upon any untrue statement or alleged untrue statement of a
material fact contained in the Registration Statement or the Prospectus, or in
any supplement thereto or amendment thereof, 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, in the light of the
circumstances under which they were made, not misleading, in each case to the
extent, but only to the extent, that any such loss, liability, claim, damage or
expense arises out of or is based upon any untrue statement or alleged untrue
statement or omission or alleged omission made therein in reliance upon and in
conformity with written information relating to the Underwriters furnished to
the Company by or on behalf of the Underwriters expressly for use therein;
provided, however, that in no case shall the Underwriters be liable or
responsible for any

                                       15
<PAGE>

amount in excess of the discounts and commissions received by the Underwriters,
as set forth in the Prospectus. This indemnity will be in addition to any
liability that the Underwriters may otherwise have, including under this
Agreement.

          (c)  Promptly after receipt by an indemnified party under subsection
(a) or (b) above of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against the
indemnifying party under such subsection, notify each party against whom
indemnification is to be sought in writing of the commencement thereof (but the
failure so to notify an indemnifying party shall not relieve it from any
liability that it may have under this Section 6 or otherwise except to the
extent that it has been prejudiced in any material respect by such failure).  In
case any such action is brought against any indemnified party, and it notifies
an indemnifying party of the commencement thereof, the indemnifying party will
be entitled to participate therein, and to the extent it may elect by written
notice delivered to the indemnified party promptly after receiving the aforesaid
notice from such indemnified party, to assume the defense thereof with counsel
reasonably satisfactory to such indemnified party.  Notwithstanding the
foregoing, the indemnified party or parties shall have the right to employ its
or their own counsel in any such case, but the fees and expenses of such counsel
shall be at the expense of such indemnified party or parties unless (i) the
employment of such counsel shall have been authorized in writing by the
indemnifying parties in connection with the defense of such action, (ii) the
indemnifying parties shall not have employed counsel to take charge of the
defense of such action within a reasonable time after notice of commencement of
the action, or (iii) such indemnified party or parties shall have reasonably
concluded that there may be defenses available to it or them that are different
from or additional to those available to one or all of the indemnifying parties
(in which case the indemnifying party or parties shall not have the right to
direct the defense of such action on behalf of the indemnified party or
parties), in any of which events such fees and expenses of counsel shall be
borne by the indemnifying parties; provided, however, that the indemnifying
party under subsection (a) or (b) above shall only be liable for the legal
expenses of one counsel (in addition to any local counsel) for all indemnified
parties in each jurisdiction in which any claim or action is brought. Anything
in this subsection to the contrary notwithstanding, an indemnifying party shall
not be liable for any settlement of any claim or action effected without its
prior written consent, provided that such consent was not unreasonably withheld.

     7.   CONTRIBUTION.  In order to provide for contribution in circumstances
in which the indemnification provided for in Section 6 is for any reason held to
be unavailable or is insufficient to hold harmless a party indemnified
thereunder, the Company, on the one hand, and the Underwriters, on the other
hand, shall contribute to the aggregate losses, claims, damages, liabilities and
expenses of the nature contemplated by such indemnification provision (including
any investigation, legal and other expenses incurred in connection with, and any
amount paid in settlement of, any action, suit or proceeding or any claims
asserted, but after deducting in the case of losses, claims, damages,
liabilities and expenses suffered by the Company, any contribution received by
the Company from persons, other than the Underwriters, who may also be liable
for contribution, including persons who control the Company within the meaning
of Section 15 of the Act or Section 20(a) of the Exchange Act) to which the
Company and the Underwriters may be subject, in such proportion as is
appropriate to reflect the relative benefits received by the Company, on one
hand, and the Underwriters, on the other hand, from the offering of the Notes
or, if such

                                       16
<PAGE>

allocation is not permitted by applicable law or indemnification is not
available as a result of the indemnifying party not having received notice as
provided in Section 6, in such proportion as is appropriate to reflect not only
the relative benefits referred to above but also the relative fault of the
Company, on the one hand, and the Underwriters, on the other hand, in connection
with the statements or omissions that resulted in such losses, claims, damages,
liabilities or expenses, as well as any other relevant equitable considerations.
The relative benefits received by the Company, on the one hand, and the
Underwriters, on the other hand, shall be deemed to be in the same proportion as
(i) the total proceeds from the offering of Notes (net of underwriting discounts
and commissions but before deducting expenses) received by the Company and (ii)
the underwriting discounts and commissions received by the Underwriters,
respectively, in each case as set forth in the Prospectus. The relative fault of
the Company, on the one hand, and of the Underwriters, on the other hand, 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 the
Underwriters and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission. The Company
and the Underwriters agree that it would not be just and equitable if
contribution pursuant to this Section 7 were determined by pro rata allocation
or by any other method of allocation which does not take into account the
equitable considerations referred to above. Notwithstanding the provisions of
this Section 7, (i) in no case shall the Underwriters be required to contribute
any amount in excess of the amount by which the underwriting discounts and
commissions applicable to the Notes purchased by the Underwriters pursuant to
this Agreement exceeds the amount of any damages that the Underwriters have
otherwise been required to pay by reason of any untrue or alleged untrue
statement or omission or alleged omission and (ii) 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. For purposes of this Section 7, (A) each person,
if any, who controls the Underwriters within the meaning of Section 15 of the
Act or Section 20(a) of the Exchange Act and (B) the respective officers,
directors, partners, employees, representatives and agents of the Underwriters
or any controlling person shall have the same rights to contribution as the
Underwriters, and (A) each person, if any, who controls the Company within the
meaning of Section 15 of the Act or Section 20(a) of the Exchange Act and (B)
the respective officers, directors, partners, employees, representatives and
agents of the Company shall have the same rights to contribution as the Company,
subject in each case to clauses (i) and (ii) of this Section 7. Any party
entitled to contribution will, promptly after receipt of notice of commencement
of any action, suit or proceeding against such party in respect of which a claim
for contribution may be made against another party or parties under this Section
7, notify such party or parties from whom contribution may be sought, but the
failure to so notify such party or parties shall not relieve the party or
parties from whom contribution may be sought from any obligation it or they may
have under this Section 7 or otherwise. No party shall be liable for
contribution with respect to any action or claim settled without its prior
written consent, provided that such written consent was not unreasonably
withheld.

     8.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS.  The obligations of the
Underwriters to purchase and pay for the Notes, as provided herein, shall be
subject to the satisfaction of the following conditions:

                                       17
<PAGE>

          (a)  All of the representations and warranties of the Company
contained in this Agreement shall be true and correct on the date hereof and on
the Closing Date with the same force and effect as if made on and as of the date
hereof and the Closing Date, respectively.  The Company shall have performed or
complied in all material respects with all of the agreements herein contained
and required to be performed or complied with by it at or prior to the Closing
Date.

          (b)  The Prospectus, as amended or supplemented, shall have been filed
with the Commission pursuant to Rule 424(b) under the Act within the applicable
time period prescribed for such filing thereby.  Prior to such Closing Date, no
stop order with respect to the effectiveness of the Registration Statement or
any part thereof shall have been issued under the Act by the Commission, and at
such Closing Date no proceedings therefore shall be pending or, to the knowledge
of the Company, threatened and any request of the Commission for inclusion of
additional information in the Registration Statement or the Prospectus or
otherwise shall have been complied with by the Company.

          (c)  The Prospectus shall have been printed and copies distributed to
the Underwriters not later than 10:00 a.m., New York City time, on the day
following the date of this Agreement or at such later date and time as to which
the Underwriters may agree.

          (d)  No action shall have been taken and no statute, rule, regulation
or order shall have been enacted, adopted or issued by any governmental agency
which would, as of the Closing Date, prevent the issuance of the Notes; and no
action, suit or proceeding shall have been commenced and be pending against or
affecting or, to the best knowledge of the Company, threatened against, the
Company, or any of the Subsidiaries before any court or arbitrator or any
governmental body, agency or official that, if adversely determined, could
reasonably be expected to result in a Material Adverse Effect.

          (e)  Since the dates as of which information is given in the
Prospectus, (i) there shall not have been any material change, or any
development that is reasonably likely to result in a material adverse change, in
the capital stock or the long-term debt, or material increase in the short-term
debt, of the Company or any of the Subsidiaries from that set forth in the
Prospectus, (ii) no dividend or distribution of any kind shall have been
declared, paid or made by the Company or any of its Subsidiaries on any class of
its capital stock and (iii) other than pursuant to this Agreement, neither the
Company nor any of the Subsidiaries shall have incurred any liabilities or
obligations, direct or contingent, that are or will be material, individually or
in the aggregate, to the Company and the Subsidiaries, taken as a whole, and
that are required to be disclosed on a balance sheet or notes thereto in
accordance with generally accepted accounting principles and are not disclosed
on the latest balance sheet or notes thereto included or incorporated by
reference in the Prospectus. Since the date hereof and since the dates as of
which information is given in the Prospectus, there shall not have occurred any
material adverse change, or any development that is reasonably likely to result
in a material adverse change, in the business, financial condition or results of
operations of the Company and the Subsidiaries, taken as a whole.

          (f)  The Underwriters shall have received a certificate, dated the
Closing Date, signed on behalf of the Company by two senior officers, one of
whom must be its Chief Financial

                                       18
<PAGE>

Officer, in form and substance satisfactory to the Underwriters, confirming, as
of the Closing Date, the matters set forth in paragraphs (a), (b), (c), (d) and
(e) of this Section 8 and that, as of the Closing Date, the obligations of the
Company to be performed hereunder on or prior thereto have been duly performed.

          (g)  The Underwriters shall have received on the Closing Date an
opinion, dated the Closing Date, in form and substance reasonably satisfactory
to the Underwriters and counsel for the Underwriters, of Andrews & Kurth L.L.P.,
counsel for the Company, substantially to the effect set forth in Exhibit A
hereto.

          (h)  At the time this Agreement is executed and at the Closing Date,
the Underwriters shall have received from Arthur Andersen LLP, independent
public accountants, dated as of the date of this Agreement and as of the Closing
Date, customary comfort letters addressed to the Underwriters and in form and
substance reasonably satisfactory to the Underwriters and counsel for the
Underwriters with respect to the financial statements and certain financial
information of the Company and its Subsidiaries contained and/or incorporated by
reference in the Prospectus.

          (i)  The Underwriters shall have received an opinion, dated the
Closing Date, in form and substance reasonably satisfactory to the Underwriters,
of Vinson & Elkins L.L.P., counsel for the Underwriters, covering such matters
as are customarily covered in such opinions.

          (j)  Vinson & Elkins L.L.P. shall have been furnished with such
documents, in addition to those set forth above, as they may reasonably require
for the purpose of enabling them to review or pass upon the matters referred to
in this Section 8 and in order to evidence the accuracy, completeness or
satisfaction in all material respects of any of the representations, warranties
or conditions herein contained.

          (k)  Prior to the Closing Date, the Company shall have furnished to
the Underwriters such further information, certificates and documents as the
Underwriters may reasonably request.

          (l)  The Company and the Trustee shall have entered into the
Indenture, and the Underwriters shall have received counterparts, conformed as
executed, thereof.

          (m)  On the Closing Date, either (i) the El Dorado Acquisition shall
be consummated simultaneously with the closing of the Offering, or (ii) if the
El Dorado Acquisition is not consummated simultaneously with the closing of the
Offering, the Company shall have deposited at least $5,576,363.00 in immediately
available funds into the Escrow Account.

          (n)  The Company, the Trustee and the Escrow Agent shall have entered
into the Escrow Agreement and the Underwriters shall have received copies of
executed counterparts thereof.

     All opinions, certificates, letters and other documents required by this
Section 8 to be delivered by the Company will be in compliance with the
provisions hereof only if they are reasonably satisfactory in form and substance
to the Underwriters.  The Company will furnish the

                                       19
<PAGE>

Underwriters with such conformed copies of such opinions, certificates, letters
and other documents as it shall reasonably request.

     9.   UNDERWRITERS' INFORMATION.  The Company and the Underwriters
acknowledge that the statements with respect to the offering of the Notes set
forth in the third, fifth, sixth and seventh paragraphs under the heading
"Underwriting" in the Prospectus constitute the only information furnished in
writing by the Underwriters expressly for use in the Prospectus.

     10.  SURVIVAL OF REPRESENTATIONS AND AGREEMENTS.  All representations and
warranties, covenants and agreements of the Underwriters and the Company
contained in this Agreement, including the agreements contained in Sections 4(h)
and 11(d), the indemnity agreements contained in Section 6 and the contribution
agreements contained in Section 7, shall remain operative and in full force and
effect regardless of any investigation made by or on behalf of the Underwriters,
any controlling person thereof, or by or on behalf of the Company or any
controlling person thereof, and shall survive delivery of and payment for the
Notes to and by the Underwriters.  The representations contained in Section 5
and the agreements contained in Sections 4(h), 6, 7 and 11(d) shall survive the
termination of this Agreement, including any termination pursuant to Section 11.

     11.  EFFECTIVE DATE OF AGREEMENT; TERMINATION.

          (a) This Agreement shall become effective upon execution and delivery
of a counterpart hereof by each of the parties hereto.

          (b)  The Underwriters shall have the right to terminate this Agreement
at any time prior to the Closing Date by notice to the Company from the
Underwriters, without liability (other than with respect to Sections 6 and 7) on
the Underwriters' part to the Company if, on or prior to such date, (i) the
Company shall have failed, refused or been unable to perform in any material
respect any agreement on its part to be performed hereunder, (ii) any other
condition to the obligations of the Underwriters hereunder as provided in
Section 8 is not fulfilled when and as required in any material respect, (iii)
any material adverse change shall have occurred since the date as of which
information is given in the Prospectus in the condition (financial or
otherwise), business, properties, assets, liabilities, prospects, net worth,
results of operations or cash flows of the Company and its Subsidiaries, taken
as a whole, other than as set forth in the Prospectus, or (iv) (A) any domestic
or international event or act or occurrence has materially disrupted, or in the
reasonable opinion of the Underwriters will in the immediate future materially
disrupt, the market for the Company's securities or for securities in general,
(B) trading in securities generally on the New York Stock Exchange, the American
Stock Exchange, the Chicago Board of Options Exchange, the Chicago Mercantile
Exchange, the Chicago Board of Trade or the Nasdaq National Market shall have
been suspended or materially limited, or minimum or maximum prices for trading
shall have been established, or maximum ranges for prices for securities shall
have been required, on such exchange or the Nasdaq National Market, or by such
exchange or other regulatory body or governmental authority having jurisdiction,
(C) a banking moratorium shall have been declared by federal or state
authorities, or a moratorium in foreign exchange trading by major international
banks or persons shall have been declared, (D) there is an outbreak or
escalation of armed hostilities involving the United States on or after the date
hereof, or if there has been a declaration by the

                                       20
<PAGE>

United States of a national emergency or war, the effect of which shall be, in
the Underwriters' judgment, to make it inadvisable or impracticable to proceed
with the offering or delivery of the Notes on the terms and in the manner
contemplated in the Prospectus, or (E) there shall have been such a material
adverse change in general economic, political or financial conditions or if the
effect of international conditions on the financial markets in the United States
shall be such as, in the Underwriters' judgment, makes it inadvisable or
impracticable to proceed with the delivery of the Notes as contemplated hereby.

          (c)  Any notice of termination pursuant to this Section 11 shall be by
telephone, or facsimile and, in either case, confirmed in writing by letter.

          (d)  If this Agreement shall be terminated pursuant to any of the
provisions hereof (otherwise than pursuant to clause (iv) of Section 11(b), in
which case each party will be responsible for its own expenses), or if the sale
of the Notes provided for herein is not consummated because any condition to the
obligations of the Underwriters set forth herein is not satisfied or because of
any refusal, inability or failure on the part of the Company to perform any
agreement herein or comply with any provision hereof, the Company will reimburse
the Underwriters for all out-of-pocket expenses (including the reasonable fees
and expenses of Underwriters' counsel), incurred by the Underwriters in
connection herewith.

     12.  NOTICE.  All communications hereunder, except as may be otherwise
specifically provided herein, shall be in writing and, if sent to the
Underwriters, shall be mailed, delivered, or telecopied and confirmed in writing
or sent by a nationally recognized overnight courier service guaranteeing
delivery on the next business day to Bear, Stearns & Co. Inc., Lehman Brothers
and Warburg Dillon Read LLC, c/o Bear Stearns & Co. Inc., 245 Park Avenue, New
York, New York 10167, Attention: Corporate Finance Department, telecopy number
(212) 272-3092, with a copy to Vinson & Elkins L.L.P., 2300 First City Tower,
1001 Fannin Street, Houston, Texas 77002, Attention: T. Mark Kelly, telecopy
number (713) 615-5531; and if sent to the Company, shall be mailed, delivered,
telecopied and confirmed in writing or sent by a nationally recognized overnight
courier service guaranteeing delivery on the next business day to 10000 Memorial
Drive, Suite 600, Houston, Texas  77024-3411, Attention: Corporate Secretary,
telecopy number (713) 688-0616, with a copy to Andrews & Kurth L.L.P., Chase
Tower, 600 Travis, Suite 4200, Houston, Texas  77002, Attention: Christopher S.
Collins, telecopy number (713) 220-4285.

     13.  PARTIES.  This Agreement shall inure solely to the benefit of, and
shall be binding upon, the Underwriters, the Company and the controlling persons
and agents referred to in Sections 6 and 7, and their respective successors and
assigns, and no other person shall have or be construed to have any legal or
equitable right, remedy or claim under or in respect of or by virtue of this
Agreement or any provision herein contained.  The term "successors and assigns"
shall not include a purchaser, in its capacity as such, of Notes from the
Underwriters.

     14.  CONSTRUCTION.  This Agreement shall be construed in accordance with
the internal laws of the State of New York.  TIME IS OF THE ESSENCE IN THIS
AGREEMENT.

                                       21
<PAGE>

     15.  CAPTIONS.  The captions included in this Agreement are included solely
for convenience of reference and are not to be considered a part of this
Agreement.

     16.  COUNTERPARTS.  This Agreement may be executed in various counterparts
which together shall constitute one and the same instrument.

     17.  PARTIAL INVALIDITY.  In case any provision of this Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

                                       22
<PAGE>

     If the foregoing correctly sets forth the understanding among the
Underwriters and the Company please so indicate in the space provided below for
that purpose, whereupon this letter shall constitute a binding agreement among
us.

                                    Very truly yours,

                                    FRONTIER OIL CORPORATION


                                    By:    /s/  Julie H. Edwards
                                         ---------------------------------------
                                          Name:    Julie H. Edwards
                                          Title:   Senior Vice President-Finance
                                                   and Chief Financial Officer
Accepted and agreed to as of
the date first above written:


BEAR, STEARNS & CO. INC.
LEHMAN BROTHERS
WARBURG DILLON READ LLC

By:  Bear, Stearns & Co. Inc.


By:  /s/ Stephen Straty
   ----------------------------------
   Name:     Stephen Straty
   Title:    Senior Managing Director

                                       23
<PAGE>

                                   EXHIBIT A

                   FORM OF OPINION OF ANDREWS & KURTH L.L.P.


     1.  The Company has been duly and validly incorporated and is validly
existing as a corporation in good standing under the laws of the State of
Wyoming, and is qualified to do business and is in good standing in each
jurisdiction listed on Annex A/1/; and the Company has all necessary
corporate power required to own, lease and operate its properties and conduct
its business as described in the Prospectus.

     2. Each of the Company's subsidiaries listed on Annex B ("Subsidiaries")/2/
has been duly and validly incorporated and is validly existing as a corporation
in good standing under the laws of the jurisdiction of its incorporation, and is
qualified to do business and is in good standing in each jurisdiction listed on
Annex A/3/; and each such Subsidiary has all necessary corporate power required
to own, lease and operate its properties and to conduct its business as
described in the Prospectus.

     3.  All the outstanding shares of capital stock of each of the Subsidiaries
have been duly authorized and are validly issued and outstanding, are fully paid
and nonassessable, and are owned by the Company of record and to the best
knowledge of such counsel, (A) beneficially and (B) free and clear of all liens,
encumbrances, equities, security interests or claims of any nature whatsoever,
except as specified in the Underwriting Agreement; and neither the Company nor
any of its Subsidiaries has granted any outstanding options, warrants or
commitments with respect to any shares of its capital stock, whether issued or
unissued, except as otherwise described in the Prospectus, and except for
subsequent issuances, if any, pursuant to reservations or agreements referred to
therein.

     4.  The Company has an authorized capitalization as set forth in the
Prospectus, and to the knowledge of such counsel, except as set forth in
paragraph 3 above,  there are no outstanding options, warrants or other rights
calling for the issuance of, and there are no commitments, plans or arrangements
to issue, any shares of capital stock of the Company.

     5.  The Company has all requisite corporate power and authority to execute,
deliver and perform its obligations under the Underwriting Agreement and each of
the other Operative Documents to which it is a party and to consummate the
transactions contemplated thereby, including, without limitation, the corporate
power and authority to issue, sell and deliver the Notes as provided therein.

- ----------

     /1/ Such jurisdictions where the Company has represented that the Company
conducts business.

     /2/ Frontier Holdings Inc., Frontier Refining & Marketing Inc., Frontier
Oil and Refining Company, Frontier Pipeline Inc., Frontier Refining Inc. and
Frontier El Dorado Refining Company.

     /3/ Such jurisdictions where the Company has represented that the
Subsidiaries conduct business.

                                      A-1
<PAGE>

     6.  To such counsel's knowledge, except as may be required under applicable
state securities and Blue Sky laws, as to which such counsel need express no
opinion, no consent, approval, authorization or order of, or filing,
registration, qualification, license or permit of or with, any court or
governmental agency, body or administrative agency is required for the
execution, delivery and performance by the Company of the Underwriting Agreement
or any of the other Operative Documents to which it is party, except such as
have been obtained and made or have been disclosed in the Prospectus.

     7.  Neither the Company nor any of the Subsidiaries is (i) an "investment
company" or (ii) a company "controlled" by an "investment company" within the
meaning of the Investment Company Act.

     8.  The Underwriting Agreement has been duly and validly authorized,
executed and delivered by the Company.

     9.  The Indenture has been duly and validly authorized, executed and
delivered by the Company and, assuming due authorization, execution and delivery
thereof by the Trustee and the Underwriters, is the legal, valid and binding
obligation of the Company, enforceable against it in accordance with its terms,
subject to applicable bankruptcy, insolvency, fraudulent conveyance,
reorganization or similar laws affecting the rights of creditors generally and
subject to general principles of equity.

     10.  The Escrow Agreement has been duly and validly authorized, executed
and delivered by the Company and, assuming due authorization, execution and
delivery thereof by the Trustee and the Escrow Agent, is the legal, valid and
binding obligation of the Company, enforceable against it in accordance with its
terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance,
reorganization or similar laws affecting the rights of creditors generally and
subject to general principles of equity.

     11.  The Notes have been duly and validly authorized by the Company for
issuance and sale to the Underwriters pursuant to the Underwriting Agreement
and, when issued and authenticated in accordance with the terms of the Indenture
and delivered against payment therefor in accordance with the terms thereof,
will be the legal, valid and binding obligations of the Company, enforceable
against the Company in accordance with their terms and entitled to the benefits
of the Indenture.

     12.  The asset purchase and sale agreement, the refined products offtake
agreement, the crude supply agreement, the cogeneration facility sub-sublease
agreement and the terminal agreement, in each case executed in connection with
the El Dorado Acquisition (the "Acquisition Documents"), have been duly and
validly authorized, executed and delivered by the Company or one of its
Subsidiaries, as the case may be, enforceable against the Company or such
Subsidiary in accordance with its terms, except as may be limited by bankruptcy,
insolvency and other laws affecting creditors' rights generally, or by equitable
principles; provided, however, with respect to the cogeneration facility sub-
sublease agreement, such counsel may assume Kansas law is the same as Texas law.

                                      A-2
<PAGE>

     13.  The transactions contemplated by the Acquisition Documents have been
consummated as described in the Prospectus.

     14.  None of the execution, delivery or performance by the Company of the
Underwriting Agreement or any of the other Operative Documents to which it is a
party violates, conflicts with or constitutes a breach of any of the terms or
provisions of, or a default under (or an event that with notice or the lapse of
time, or both, would constitute a default), or requires consent under, or
results in the imposition of a lien or encumbrance on any properties of the
Company or an acceleration of any indebtedness of the Company pursuant to (1)
the charter or bylaws of the Company, (2) any bond, debenture, note, indenture,
mortgage, deed of trust or other agreement or instrument known to such counsel
to which the Company is a party or by which the Company or its property is or
may be bound, or (3) any judgment, order or decree known to such counsel of any
court or governmental agency or authority having jurisdiction over the Company
or any of its assets or properties.

     15.  To the best of such counsel's knowledge, there is (A) no action, suit,
investigation or proceeding before or by any court, arbitrator or governmental
agency, body or official, domestic or foreign, now pending or threatened or
contemplated to which the Company or any of its Subsidiaries is or may be a
party or to which the business or property of the Company or any of its
Subsidiaries is or may be subject, (B) no statute, rule, regulation or order
that has been enacted, adopted or issued by any governmental agency or that has
been proposed by any governmental body and (C) no injunction, restraining order
or order of any nature by a federal or state court or foreign court of competent
jurisdiction to which the Company or any of its Subsidiaries is or may be
subject or to which the business, assets, or property of the Company or any of
its Subsidiaries is or may be subject, that, in the case of clauses (A), (B) and
(C) above, is required to be disclosed in the Prospectus and that is not so
disclosed fairly and accurately in all material respects.

     16.  To the best of such counsel's knowledge, there are no holders of
securities of the Company who, by reason of the execution by the Company of the
Underwriting Agreement or any other Operative Document or the consummation by
the Company and of the transactions contemplated hereby and thereby, have the
right to request or demand that the Company register under the Act or analogous
foreign laws and regulations securities held by them.

     17.  The descriptions or references to material contracts or agreements of
the Company or its Subsidiaries described in the Prospectus, to the extent they
constitute summaries of legal matters or legal conclusions, are true and correct
in all material respects.

     18.  The statements in the Prospectus under the heading "Description of
Indebtedness" insofar as it constitutes a summary of the 9% senior notes or the
Frontier Credit Facility and under the heading "Description of Acquisition
Documents" relating to the El Dorado Acquisition are true and correct in all
material respects.

     19.  All descriptions in the Prospectus of statutes, regulations or legal
or governmental proceedings set forth in the section titled "Business--
Government Regulation" are fair summaries thereof and fairly present the
information required to be shown with respect to such matters.

                                      A-3
<PAGE>

     20.  Assuming the proceeds from the offering of the Notes are applied as
described in the Prospectus, none of the execution, delivery and performance of
the Underwriting Agreement, the issuance and sale of the Notes, the application
of the proceeds from the issuance and sale of the Notes and the consummation of
the transactions contemplated by the Company as set forth in the Prospectus,
will violate Regulations T, U or X promulgated by the Board of Governors of the
Federal Reserve System.

     21.  The Notes and the Indenture conform as to legal matters in all
material respects to the descriptions thereof contained in the Prospectus.

     In addition, such counsel shall state that it has participated in
conferences with officers and other representatives of the Company,
representatives of the independent accountants of the Company and
representatives of the Underwriters at which the contents of the Prospectus and
related matters were discussed and, although it does not assume any
responsibility for the accuracy, completeness or fairness of the statements
contained in the Prospectus during the course of such participation, no facts
came to its attention that caused such counsel to believe that the Prospectus
(as amended or supplemented, if applicable), as of its date or the Closing Date,
contained an untrue statement of a material fact or omitted to state any 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
(except as to financial statements and related notes, the financial statement
schedules and other financial and statistical data included therein).

                                      A-4
<PAGE>

                                    ANNEX A

<TABLE>
<CAPTION>

CORPORATION (STATE OF INCORPORATION)                             STATES OF QUALIFICATION
- ------------------------------------                             -----------------------
<S>                                                              <C>
Frontier Oil Corporation (Wyoming)............................   Colorado, Montana, North Dakota, Nebraska, Utah, Idaho, Kansas,
                                                                 Oklahoma, Texas

Frontier Holdings Inc. (Delaware).............................   Colorado

Frontier Refining & Marketing Inc. (Delaware).................   Colorado

Frontier Oil and Refining Company (Delaware)..................   Colorado, California, Illinois, Iowa, Missouri, Wisconsin,
                                                                 Minnesota, Idaho, Kansas, Montana, Nebraska, North Dakota,
                                                                 Oklahoma, South Dakota, Texas, Utah, Wyoming

Frontier Pipeline Inc. (Delaware).............................   Wyoming

Frontier Refining Inc. (Delaware).............................   Wyoming

Frontier El Dorado Refining Company (Delaware)................   Kansas
</TABLE>
<PAGE>

                                    ANNEX B

Frontier Holdings Inc., Frontier Refining & Marketing Inc., Frontier Oil and
Refining Company, Frontier Pipeline Inc., Frontier Refining Inc. and Frontier
El Dorado Refining Company
<PAGE>

                                  SCHEDULE I

<TABLE>
<CAPTION>

                                                          Amount of
Name of Underwriter                                    Notes Purchased
- -------------------                                    ---------------
<S>                                                    <C>
Bear, Stearns & Co. Inc................................   $114,000,000
Lehman Brothers........................................     38,000,000
Warburg Dillon Read LLC................................     38,000,000
                                                          ------------
     Total.............................................   $190,000,000
                                                          ============
</TABLE>

<PAGE>

                                                                     EXHIBIT 4.1

================================================================================




                           FRONTIER OIL CORPORATION



                        11 3/4% SENIOR NOTES DUE 2009,
                             SERIES A AND SERIES B


                                   ---------
                                   INDENTURE

                         DATED AS OF NOVEMBER 12, 1999
                                   ---------


                                   ---------
                             CHASE BANK OF TEXAS,
                             NATIONAL ASSOCIATION

                                    TRUSTEE
                                   ---------


================================================================================
<PAGE>

                            CROSS-REFERENCE TABLE*

Trust Indenture
Act Section                                                    Indenture Section
- ---------------                                                -----------------

310(a)(1)...................................................               7.10
   (a)(2)...................................................               7.10
   (a)(3)...................................................                N/A
   (a)(4)...................................................                N/A
   (a)(5)...................................................               7.10
   (b)......................................................               7.10
   (c)......................................................                N/A
311(a)......................................................               7.11
   (b)......................................................               7.11
   (c)......................................................                N/A
312(a)......................................................               2.05
   (b)......................................................              11.03
   (c)......................................................              11.03
313(a)......................................................               7.06
   (b)(1)...................................................               7.06
   (b)(2)...................................................         7.06, 7.07
   (c)......................................................        7.06, 11.02
   (d)......................................................               7.06
314(a)......................................................        4.03, 11.02
   (b)......................................................                N/A
   (c)(1)...................................................              11.04
   (c)(2)...................................................              11.04
   (c)(3)...................................................                N/A
   (d)......................................................                N/A
   (e)......................................................              11.05
   (f)......................................................                N/A
315(a)......................................................               7.01
   (b)......................................................        7.05, 11.02
   (c)......................................................               7.01
   (d)......................................................               7.01
   (e)......................................................               6.11
316(a)(last sentence).......................................               2.09
   (a)(1)(A)................................................               6.05
   (a)(1)(B)................................................               6.04
   (a)(2)...................................................                N/A
   (b)......................................................               6.07
   (c)......................................................               2.12
317(a)(1)...................................................               6.08
   (a)(2)...................................................               6.09
   (b)......................................................               2.04
318(a)......................................................              11.01
   (b)......................................................                N/A
   (c)......................................................              11.01

- ---------------
N/A means not applicable.

*This Cross-Reference Table is not part of the Indenture.
<PAGE>

                               TABLE OF CONTENTS

                                                                            Page
ARTICLE 1
     DEFINITIONS AND INCORPORATION BY REFERENCE

     Section 1.01.  Definitions.............................................   1
     Section 1.02.  Other Definitions.......................................  18
     Section 1.03.  Incorporation by Reference of Trust Indenture Act.......  18
     Section 1.04.  Rules of Construction...................................  19

ARTICLE 2
     THE NOTES

     Section 2.01.  Form and Dating.........................................  19
     Section 2.02.  Execution and Authentication............................  21
     Section 2.03.  Registrar and Paying Agent..............................  22
     Section 2.04.  Paying Agent to Hold Money in Trust.....................  22
     Section 2.05.  Holder Lists............................................  22
     Section 2.06.  Transfer and Exchange...................................  23
     Section 2.07.  Replacement Notes.......................................  30
     Section 2.08.  Outstanding Notes.......................................  31
     Section 2.09.  Treasury Notes..........................................  31
     Section 2.10.  Temporary Notes.........................................  32
     Section 2.11.  Cancellation............................................  32
     Section 2.12.  Defaulted Interest......................................  32

ARTICLE 3
     REDEMPTION AND PREPAYMENT

     Section 3.01.  Notices to Trustee......................................  32
     Section 3.02.  Selection of Notes to Be Redeemed.......................  33
     Section 3.03.  Notice of Redemption....................................  33
     Section 3.04.  Effect of Notice of Redemption..........................  34
     Section 3.05.  Deposit of Redemption Price.............................  34
     Section 3.06.  Notes Redeemed in Part..................................  35
     Section 3.07.  Optional Redemption.....................................  35
     Section 3.08.  Mandatory Redemption....................................  35
     Section 3.09.  Offer to Purchase by Application of Excess Proceeds.....  36

                                      -i-
<PAGE>

ARTICLE 4
     COVENANTS

     Section 4.01.  Payment of Notes........................................  37
     Section 4.02.  Maintenance of Office or Agency.........................  38
     Section 4.03.  Reports.................................................  38
     Section 4.04.  Compliance Certificate..................................  39
     Section 4.05.  Taxes...................................................  39
     Section 4.06.  Stay, Extension and Usury Laws..........................  40
     Section 4.07.  Restricted Payments.....................................  40
     Section 4.08.  Dividend and Other Payment Restrictions Affecting
                    Subsidiaries............................................  42
     Section 4.09.  Incurrence of Indebtedness and Issuance of
                    Disqualified Stock......................................  43
     Section 4.10.  Asset Sales.............................................  43
     Section 4.11.  Transactions with Affiliates............................  44
     Section 4.12.  Liens...................................................  45
     Section 4.13.  Future Subsidiary Guarantees............................  45
     Section 4.14.  Corporate Existence.....................................  46
     Section 4.15.  Offer to Repurchase Upon Change of Control..............  46
     Section 4.16.  Issuances and Sales of Capital Stock of Wholly
                    Owned Restricted Subsidiaries...........................  47
     Section 4.17.  Sale-and-leaseback Transactions.........................  47
     Section 4.18.  No Inducements..........................................  48
     Section 4.19.  Line of Business........................................  48

ARTICLE 5
     SUCCESSORS

     Section 5.01.  Merger, Consolidation, or Sale of Assets................  48
     Section 5.02.  Successor Corporation Substituted.......................  49

ARTICLE 6
     DEFAULTS AND REMEDIES

     Section 6.01.  Events of Default.......................................  49
     Section 6.02.  Acceleration............................................  51
     Section 6.03.  Other Remedies..........................................  51
     Section 6.04.  Waiver of Past Defaults.................................  52
     Section 6.05.  Control by Majority.....................................  52
     Section 6.06.  Limitation on Suits.....................................  52
     Section 6.07.  Rights of Holders of Notes to Receive Payment...........  53
     Section 6.08.  Collection Suit by Trustee..............................  53
     Section 6.09.  Trustee May File Proofs of Claim........................  53
     Section 6.10.  Priorities..............................................  53
     Section 6.11.  Undertaking for Costs...................................  54

                                     -ii-
<PAGE>

ARTICLE 7
     TRUSTEE

     Section 7.01.  Duties of Trustee.......................................  54
     Section 7.02.  Rights of Trustee.......................................  55
     Section 7.03.  Individual Rights of Trustee............................  56
     Section 7.04.  Trustee's Disclaimer....................................  56
     Section 7.05.  Notice of Defaults......................................  56
     Section 7.06.  Reports by Trustee to Holders of the Notes..............  57
     Section 7.07.  Compensation and Indemnity..............................  57
     Section 7.08.  Replacement of Trustee..................................  58
     Section 7.09.  Successor Trustee by Merger, etc........................  59
     Section 7.10.  Eligibility; Disqualification...........................  59
     Section 7.11.  Preferential Collection of Claims Against Company.......  59

ARTICLE 8
     LEGAL DEFEASANCE AND COVENANT DEFEASANCE

     Section 8.01.  Option to Effect Legal Defeasance or Covenant
                    Defeasance..............................................  59
     Section 8.02.  Legal Defeasance and Discharge..........................  59
     Section 8.03.  Covenant Defeasance.....................................  60
     Section 8.04.  Conditions to Legal or Covenant Defeasance..............  61
     Section 8.05.  Deposited Money and Government Securities to be Held
                    in Trust; Other Miscellaneous Provisions................  62
     Section 8.06.  Repayment to Company....................................  62
     Section 8.07.  Reinstatement...........................................  63

ARTICLE 9
     AMENDMENT, SUPPLEMENT AND WAIVER

     Section 9.01.  Without Consent of Holders of Notes.....................  63
     Section 9.02.  With Consent of Holders of Notes........................  64
     Section 9.03.  Compliance with Trust Indenture Act.....................  65
     Section 9.04.  Revocation and Effect of Consents.......................  65
     Section 9.05.  Notation on or Exchange of Notes........................  66
     Section 9.06.  Trustee to Sign Amendments, etc.........................  66

ARTICLE 10
     GUARANTEES OF NOTES

     Section 10.01. Subsidiary Guarantees...................................  66
     Section 10.02. Execution and Delivery of Subsidiary Guarantee..........  67
     Section 10.03. Guarantors May Consolidate, etc., on Certain Terms......  68
     Section 10.04. Releases Following Sale of Assets.......................  68
     Section 10.05. Releases Following Designation as an Unrestricted
                    Subsidiary..............................................  69

                                     -iii-
<PAGE>

     Section 10.06. Limitation on Guarantor Liability.......................  69
     Section 10.07. "Trustee" to Include Paying Agent.......................  69

ARTICLE 11
     MISCELLANEOUS

     Section 11.01. Trust Indenture Act Controls............................  70
     Section 11.02. Notices.................................................  70
     Section 11.03. Communication by Holders of Notes with Other Holders
                    of Notes................................................  72
     Section 11.04. Certificate and Opinion as to Conditions Precedent......  72
     Section 11.05. Statements Required in Certificate or Opinion...........  72
     Section 11.06. Rules by Trustee and Agents.............................  73
     Section 11.07. No Personal Liability of Directors, Officers,
                    Employees and Stockholders..............................  73
     Section 11.08. Governing Law...........................................  73
     Section 11.09. No Adverse Interpretation of Other Agreements...........  73
     Section 11.10. Successors..............................................  73
     Section 11.11. Severability............................................  73
     Section 11.12. Counterpart Originals...................................  73
     Section 11.13. Table of Contents, Headings, etc........................  74


                                   EXHIBITS

EXHIBIT A-1  Form of Note................................................. A-1-1
EXHIBIT A-2  Form of Regulation S Temporary Global Note................... A-2-1
EXHIBIT B-1  Certificate of Transferor from 144A Global Note to
             Regulation S Global Note..................................... B-1-1
EXHIBIT B-2  Certificate of Transferor from Regulation S
             Global Note to 144A Global Note.............................. B-2-1
EXHIBIT B-3  Certificate of Transferor of Definitive Notes................ B-3-1
EXHIBIT B-4  Certificate of Transferor from Global Note to
             Definitive  Note............................................. B-4-1
EXHIBIT C    Certificate of Institutional Accredited Investor.............   C-1
EXHIBIT D    Form of Subsidiary Guarantee.................................   D-1
EXHIBIT E    Form of Supplemental Indenture...............................   E-1

                                     -iv-
<PAGE>

     This Indenture, dated as of November 12, 1999 is between Frontier Oil
Corporation, a Wyoming corporation (the "Company"), and Chase Bank of Texas,
National Association, a national banking association, as trustee (the
"Trustee").

     The Company and the Trustee agree as follows for the benefit of each other
and for the equal and ratable benefit of the Holders of the 11 3/4% Senior Notes
due 2009, Series A (the "Series A Notes"), whether issued on the date hereof or
from time to time thereafter, and the Holders of any 11 3/4% Senior Notes due
2009, Series B (the "Series B Notes" and, together with the Series A Notes, the
"Notes") that may be issued in exchange for Series A Notes of equal principal
amount, without preference of one series of Notes over the other:

                                   ARTICLE 1
                         DEFINITIONS AND INCORPORATION
                                 BY REFERENCE

Section 1.01. Definitions.

     "144A Global Note" means a permanent global senior note that contains the
paragraph referred to in footnote 1 and the additional schedule referred to in
footnote 4 to the form of the Note attached hereto as Exhibit A-1, and that is
deposited with the Note Custodian and registered in the name of the Depository
or its nominee, representing a series of Notes sold in reliance on Rule 144A or
another exemption from the registration requirements of the Securities Act,
other than Regulation S.

     "1998 Registration Rights Agreement" means the Registration Rights
Agreement, dated February 9, 1998, between the Company and Bear, Stearns & Co.
Inc. relating to the 9 1/8% Senior Notes due 2006, Series A of the Company.

     "Adjusted Net Assets" of a Guarantor at any date shall mean the amount by
which the fair value of the properties and assets of such Guarantor exceeds the
total amount of liabilities, including, without limitation, contingent
liabilities (after giving effect to all other fixed and contingent liabilities
incurred or assumed on such date), but excluding liabilities under its
Subsidiary Guarantee, of such Guarantor at such date.

     "Affiliate" of any specified Person means an "affiliate" of such Person, as
such term is defined for purposes of Rule 144 under the Securities Act.

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

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

     "Asset Sale" means (a) the sale, lease, conveyance or other disposition (a
"disposition") of any assets or rights (including, without limitation, by way of
a sale and leaseback), excluding dispositions in the ordinary course of business
(provided that the disposition of all or substantially
<PAGE>

all of the assets of the Company and its Subsidiaries taken as a whole will be
governed by Sections 4.15 and/or 5.01 of this Indenture and not by the
provisions of Section 4.10 hereof), (b) the issue or sale by the Company or any
of its Restricted Subsidiaries of Equity Interests of any of the Company's
Subsidiaries, and (c) any Event of Loss, whether in the case of clause (a), (b)
or (c), in a single transaction or a series of related transactions, provided
that such transaction or series of transactions (i) has a fair market value in
excess of $1.0 million or (ii) results in the payment of net proceeds in excess
of $1.0 million. Notwithstanding the foregoing, the following transactions will
be deemed not to be Asset Sales: (A) a disposition of obsolete or excess
equipment or other assets; (B) a disposition of assets by the Company to a
Wholly Owned Restricted Subsidiary or by a Wholly Owned Restricted Subsidiary to
the Company or to another Wholly Owned Restricted Subsidiary; (C) a disposition
of Equity Interests by a Wholly Owned Restricted Subsidiary to the Company or to
another Wholly Owned Restricted Subsidiary; (D) a Permitted Investment or
Restricted Payment that is permitted by this Indenture; (E) any lease of any
equipment or other assets entered into in the ordinary course of business and
with respect to which the Company or any Restricted Subsidiary thereof is the
lessor, except any such lease that provides for the acquisition of such assets
by the lessee during or at the end of the term thereof for an amount that is
less than the fair market value thereof at the time the right to acquire such
assets occurs; (F) any sale of inventory or hydrocarbons or other products
(including crude oil and refined products), in each case in the ordinary course
of business of the Company's operations; and (G) any trade or exchange by the
Company or any Restricted Subsidiary of any inventory or hydrocarbons or other
products (including crude oil and refined products) or similar products owned or
held by another Person, provided that the fair market value of the properties
traded or exchanged by the Company or such Restricted Subsidiary is reasonably
equivalent to the fair market value of the properties to be received by the
Company or such Restricted Subsidiary. The fair market value of any non-cash
proceeds of a disposition of assets and of any assets referred to in the
foregoing clause (G) of this definition shall be determined in the manner
contemplated in the definition of the term "fair market value," and, in the
event the fair market value so determined exceeds $2.0 million, the results of
such determination shall be set forth in an Officers' Certificate delivered to
the Trustee.

     "Attributable Indebtedness"  in respect of a sale-and-leaseback transaction
means, at the time of determination, the present value (discounted at the rate
of interest implicit in such transaction, determined in accordance with GAAP) of
the obligation of the lessee for net rental payments during the remaining term
of the lease included in such sale-and-lease-back transaction (including any
period for which such lease has been extended or may, at the option of the
lessor, be extended).  As used in the preceding sentence, the "net rental
payments" under any lease for any such period  shall mean the sum of rental and
other payments required to be paid with respect to such period by the lessee
thereunder, excluding any amounts required to be paid by such lessee on account
of maintenance and repairs, insurance, taxes, assessments, water rates or
similar charges.  In the case of any lease that is terminable by the lessee upon
payment of penalty, such net rental payment shall also include the amount of
such penalty, but no rent shall be considered as required to be paid under such
lease subsequent to the first date upon which it may be so terminated.

     "Bankruptcy Law" means Title 11, United States Code, or any similar federal
or state law for the relief of debtors.

                                      -2-
<PAGE>

     "Board of Directors" means the board of directors of the Company or any
committee thereof that is authorized to act on behalf of such board.

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

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

     "Capital Stock" means (a) in the case of a corporation, corporate stock,
(b) in the case of an association or business entity, any and all shares,
interests, participations, rights or other equivalents (however designated) of
corporate stock, (c) in the case of a partnership or limited liability company,
partnership or membership interests (whether general or limited) and (d) any
other interest or participation that confers on a Person the right to receive a
share of the profits and losses of, or distributions of assets of, the issuing
Person.

     "Cash Equivalents" means (a) United States dollars or up to $2.0 million of
Canadian dollars, (b) securities issued or directly and fully guaranteed or
insured by the United States government or any agency or instrumentality thereof
having maturities of not more than six months from the date of acquisition, (c)
certificates of deposit and Eurodollar time deposits with maturities of six
months or less from the date of acquisition, bankers' acceptances with
maturities not exceeding six months and overnight bank deposits, in each case
with any commercial bank organized under the laws of any country that is a
member of the Organization for Economic Cooperation and Development having
capital and surplus in excess of $500 million, (d) repurchase obligations with a
term of not more than seven days for underlying securities of the types
described in clauses (b) and (c) above entered into with any financial
institution meeting the qualifications specified in clause (c) above, (e)
commercial paper having the highest rating obtainable from Moody's Investors
Service, Inc. or Standard & Poor's Ratings Services and in each case maturing
within 180 days after the date of acquisition, (f) deposits available for
withdrawal on demand with any commercial bank not meeting the qualifications
specified in clause (c) above, provided all such deposits do not exceed $2.0
million in the aggregate at any one time,  and (g) money market mutual funds
substantially all of the assets of which are of the type described in the
foregoing clauses (a) through (e).

     "Cedel" means Cedel bank, societe anonyme.

     "Change of Control" means the occurrence of any of the following:  (a) the
sale, lease, transfer, conveyance or other disposition (other than by way of
merger or consolidation), in one or a series of related transactions, of all or
substantially all of the assets of the Company and its Subsidiaries, taken as a
whole, (b) the adoption of a plan relating to the liquidation or dissolution of
the Company, (c) the consummation of any transaction (including, without
limitation, any merger or consolidation) the result of which is that any
"person" (as such term is used in Section 13(d)(3) of the Exchange Act) becomes
the "beneficial owner" (as such term is defined in Rule 13d-3 and Rule 13d-5
under the Exchange Act), directly or indirectly through one or more
intermediaries, of more than 50% of the voting power of the outstanding voting
stock of the Company or (d) the first day on which more than a majority of the
members of the Board of Directors are not Continuing

                                      -3-
<PAGE>

Directors; provided, however, that a transaction in which the Company becomes a
Subsidiary of another Person (other than a Person that is an individual) shall
not constitute a Change of Control if (i) the stockholders of the Company
immediately prior to such transaction "beneficially own" (as such term is
defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act), directly or
indirectly through one or more intermediaries, at least a majority of the voting
power of the outstanding voting stock of the Company immediately following the
consummation of such transaction and (ii) immediately following the consummation
of such transaction, no "person" (as such term is defined above), other than
such other Person (but including the holders of the Equity Interests of such
other Person), "beneficially owns" (as such term is defined above), directly or
indirectly through one or more intermediaries, more than 50% of the voting power
of the outstanding voting stock of the Company.

     "Common Stock" means the common stock of the Company, no par value per
share.

     "Consolidated Cash Flow" means, with respect to any Person for any period,
the Consolidated Net Income of such Person for such period plus, to the extent
deducted or excluded in calculating Consolidated Net Income for such period, (a)
an amount equal to any extraordinary loss plus any net loss realized in
connection with an Asset Sale, (b) provision for taxes based on income or
profits of such Person and its Restricted Subsidiaries, (c) Consolidated
Interest Expense of such Person and its Restricted Subsidiaries, and (d)
depreciation and amortization (including amortization of goodwill and other
intangibles but excluding amortization of prepaid cash expenses that were paid
in a prior period) of such Person and its Restricted Subsidiaries, in each case,
on a consolidated basis and determined in accordance with GAAP.

     "Consolidated Interest Coverage Ratio" means with respect to any Person for
any period, the ratio of the Consolidated Cash Flow of such Person for such
period to the Consolidated Interest Expense of such Person for such period;
provided, however, that the Consolidated Interest Coverage Ratio shall be
calculated giving pro forma effect to each of the following transactions as if
each such transaction had occurred at the beginning of the applicable four-
quarter reference period:  (a) any incurrence, assumption, guarantee or
redemption by the Company or any of its Restricted Subsidiaries of any
Indebtedness (other than revolving credit borrowings) subsequent to the
commencement of the period for which the Consolidated Interest Coverage Ratio is
being calculated but prior to the date on which the event for which the
calculation of the Consolidated Interest Coverage Ratio is made (the
"Calculation Date"); (b) any acquisition that has been made by the Company or
any of its Restricted Subsidiaries, or approved and expected to be consummated
within 30 days of the Calculation Date, including, in each case, through a
merger or consolidation, and including any related financing transactions,
during the four-quarter reference period or subsequent to such reference period
and on or prior to the Calculation Date (in which case Consolidated Cash Flow
for such reference period shall be calculated without giving effect to clause
(c) of the proviso set forth in the definition of Consolidated Net Income); and
(c) any other transaction that may be given pro forma effect in accordance with
Article 11 of Regulation S-X as in effect from time to time; provided, further,
however, that (i) the Consolidated Cash Flow attributable to discontinued
operations, as determined in accordance with GAAP, and operations or businesses

                                      -4-
<PAGE>

disposed of prior to the Calculation Date, shall be excluded and (ii) the
Consolidated Interest Expense attributable to discontinued operations, as
determined in accordance with GAAP, and operations or businesses disposed of
prior to the Calculation Date, shall be excluded, but only to the extent that
the obligations giving rise to such Consolidated Interest Expense will not be
obligations of the referent Person or any of its Restricted Subsidiaries
following the Calculation Date.

     "Consolidated Interest Expense" means, with respect to any Person for any
period, the sum, without duplication, of (a) the consolidated interest expense
of such Person and its Restricted Subsidiaries for such period, whether paid or
accrued (including, without limitation, amortization of original issue discount,
non-cash interest payments, the interest component of any deferred payment
obligations, the interest component of all payments associated with Capital
Lease Obligations, commissions, discounts and other fees and charges incurred in
respect of letter of credit or bankers' acceptance financings, and net payments
(if any) pursuant to Hedging Obligations but excluding amortization of debt
issuance costs) and (b) the consolidated interest expense of such Person and its
Restricted Subsidiaries that was capitalized during such period, in each case
determined on a consolidated basis in accordance with GAAP.

     "Consolidated Net Income" means, with respect to any Person for any period,
the aggregate of the Net Income of such Person and its Restricted Subsidiaries
for such period, on a consolidated basis, determined in accordance with GAAP,
provided that (a) the Net Income (but not loss) of any Person that is not a
Restricted Subsidiary or that is accounted for by the equity method of
accounting shall be included only to the extent of the amount of dividends or
distributions paid in cash to the referent Person or a Restricted Subsidiary
thereof, (b) the Net Income of any Restricted Subsidiary shall be excluded to
the extent that the declaration or payment of dividends or similar distributions
by that Restricted Subsidiary of that Net Income is not at the date of
determination permitted without any prior governmental approval (that has not
been obtained) or, directly or indirectly, by operation of the terms of its
charter or any agreement, instrument, judgment, decree, order, statute, rule or
governmental regulation applicable to that Subsidiary or its stockholders, (c)
the Net Income of any Person acquired in a pooling of interests transaction for
any period prior to the date of such acquisition shall be excluded and (d) the
cumulative effect of a change in accounting principles shall be excluded.

     "Consolidated Net Tangible Assets" means, with respect to any Person as of
any date, the sum of the amounts that would appear on a consolidated balance
sheet of such Person and its consolidated Restricted Subsidiaries as the total
assets of such Person and its consolidated Restricted Subsidiaries, determined
on a consolidated basis in accordance with GAAP and after deducting therefrom,
(a) to the extent otherwise included, unamortized debt discount and expenses and
other unamortized deferred charges, goodwill, patents, trademarks, service
marks, trade names, copyrights, licenses, organization or development expenses
and other intangible items and (b) the aggregate amount of liabilities of the
Company and its Restricted Subsidiaries which may be properly classified as
current liabilities (including tax accrued as estimated), determined on a
consolidated basis in accordance with GAAP.

     "Consolidated Net Worth" means, with respect to any Person as of any date,
the sum of (a) the consolidated equity of the common stockholders of such Person
and its consolidated Restricted Subsidiaries as of such date plus (b) the
respective amounts reported on such Person's balance sheet as of such date with
respect to any series of preferred stock (other than Disqualified

                                      -5-
<PAGE>

Stock) that by its terms is not entitled to the payment of dividends unless such
dividends may be declared and paid only out of net earnings in respect of the
year of such declaration and payment, but only to the extent of any cash
received by such Person upon issuance of such preferred stock, less (i) all
write-ups (other than write-ups resulting from foreign currency translations and
write-ups of tangible assets of a going concern business made within 12 months
after the acquisition of such business) subsequent to the Issue Date in the book
value of any asset owned by such Person or a consolidated Restricted Subsidiary
of such Person, (ii) all investments as of such date in unconsolidated
Subsidiaries and in Persons that are not Restricted Subsidiaries and (iii) all
unamortized debt discount and expense and unamortized deferred charges as of
such date, in each case determined in accordance with GAAP.

     "Continuing Director" means, as of any date of determination, any member of
the Board of Directors who (a) was a member of the Board of Directors on the
Issue Date or (b) was nominated for election to the Board of Directors with the
approval of, or whose election to the Board of Directors was ratified by, at
least two-thirds of the Continuing Directors who were members of the Board of
Directors at the time of such nomination or election.

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

     "Credit Facility" means that certain Revolving Credit and Letter of Credit
Agreement, dated November 1999 among Frontier Oil and Refining Company, Union
Bank of California, N.A., Paribas and certain other banks, including any related
notes, guarantees, collateral documents, instruments and agreements executed in
connection therewith, in each case as amended, restated, modified, supplemented,
extended, renewed, replaced, refinanced or restructured from time to time,
whether by the same or any other agent or agents, lender or group of lenders,
whether represented by one or more agreements and whether one or more
Subsidiaries are added or removed as borrowers or guarantors thereunder or as
parties thereto.

     "Custodian" means any receiver, trustee, assignee, liquidator, sequestrator
or similar official under any Bankruptcy Law.

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

     "Definitive Notes" means Notes that are in the form of Exhibit A-1 attached
hereto (but without including the text referred to in footnotes 1 and 4
thereto).

     "Deposit" means the $192,844,163 initially deposited with the escrow agent
under the Escrow Agreement, as such sum may increase or decrease as a result of
the investment and reinvestment thereof and as such sum may be reduced by
charges thereto and payments and set offs therefrom to compensate or reimburse
such escrow agent for amounts owing to it pursuant to the Escrow Agreement.

                                      -6-
<PAGE>

     "Depository" means, with respect to the Notes issuable or issued in whole
or in part in global form, the Person specified in Section 2.03 hereof as the
Depository with respect to the Notes, until a successor shall have been
appointed and become such pursuant to the applicable provision of this
Indenture, and, thereafter, "Depository" shall mean or include such successor.

     "Disqualified Stock" means any Capital Stock that, by its terms (or by the
terms of any security into which it is convertible or for which it is
exchangeable), or upon the happening of any event, matures (excluding any
maturity as a result of an optional redemption by the issuer thereof) or is
mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or
redeemable at the option of the holder thereof, in whole or in part, on or prior
to the date that is 91 days after the date on which the Notes mature or are
redeemed or retired in full; provided, however, that any Capital Stock that
would constitute Disqualified Stock solely because the holders thereof (or of
any security into which it is convertible or for which it is exchangeable) have
the right to require the issuer to repurchase such Capital Stock (or such
security into which it is convertible or for which it is exchangeable) upon the
occurrence of any of the events constituting an Asset Sale or a Change of
Control shall not constitute Disqualified Stock if such Capital Stock (and all
such securities into which it is convertible or for which it is exchangeable)
provides that the issuer thereof will not repurchase or redeem any such Capital
Stock (or any such security into which it is convertible or for which it is
exchangeable) pursuant to such provisions prior to compliance by the Company
with Section 4.10 or 4.15 of this Indenture, as the case may be.

     "Equity Interests" means Capital Stock and all warrants, options or other
rights to acquire Capital Stock (but excluding any debt security that is
convertible into, or exchangeable for, Capital Stock).

     "Escrow Agreement" means the Escrow Agreement, dated as of November 12,
1999, among the Company, the Trustee and Chase Bank of Texas, National
Association, as escrow agent.

     "Euroclear" means Morgan Guaranty Trust Company of New York, Brussels
office, as operator of the Euroclear system.

     "Event of Loss" means, with respect to any property or asset of the Company
or any Restricted Subsidiary, (a) any damage to such property or asset that
results in an insurance settlement with respect thereto on the basis of a total
loss or a constructive or compromised total loss or (b) the confiscation,
condemnation or requisition of title to such property or asset by any government
or instrumentality or agency thereof.  An Event of Loss shall be deemed to occur
as of the date of the insurance settlement, confiscation, condemnation or
requisition of title, as applicable.

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

     "Exchange Offer" means the offer that may be made by the Company pursuant
to a Registration Rights Agreement to exchange Series B Notes for Series A
Notes.

                                      -7-
<PAGE>

     "Existing Indebtedness" means Indebtedness of the Company and its
Restricted Subsidiaries (other than Indebtedness under the Credit Facility) in
existence on the Issue Date, until such amounts are repaid.

     The term "fair market value" means, with respect to any asset or
Investment, the fair market value of such asset or Investment at the time of the
event requiring such determination, as determined in good faith by the Board of
Directors, or, with respect to any asset or Investment in excess of $10.0
million (other than cash or Cash Equivalents), as determined by a reputable
appraisal firm that is, in the judgment of such Board of Directors, qualified to
perform the task for which such firm has been engaged and independent with
respect to the Company.

     "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as have been approved by a significant segment of the accounting
profession, which are in effect from time to time.

     "Global Note" means, individually and collectively, an Unrestricted Global
Note, a Regulation S Temporary Global Note, a Regulation S Permanent Global Note
and a 144A Global Note.

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

     "Guarantor" means any Restricted Subsidiary of the Company that executes a
Subsidiary Guarantee in accordance with Sections 4.13 and 10.02 hereof and (c)
the respective successors and assigns of such Restricted Subsidiaries, as
required under Article 10 hereof, in each case until such time as any such
Restricted Subsidiary shall be released and relieved of its obligations pursuant
to Section 10.04 or 10.05 hereof.

     "Hedging Obligations" means, with respect to any Person, the obligations of
such Person under (a) interest rate swap agreements, interest rate cap
agreements and interest rate collar agreements, but only to the extent that the
notional amounts of such agreements do not exceed 105% of the aggregate
principal amount of such Indebtedness to which such agreement relates, (b) other
agreements or arrangements designed to protect such Person against fluctuations
in interest rates, (c) any hedging agreement or other arrangement, in each case
that is designed to provide protection against fluctuations in the price of
crude oil and gasoline and other refined products (in the ordinary course of
business and not for speculative purposes) and (d) any foreign currency futures
contract, option or similar agreement or arrangement designed to protect such
Person against fluctuations in foreign currency rates, in each case to the
extent such obligations are incurred in the ordinary course of business of such
Person.

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

                                      -8-
<PAGE>

     "Indebtedness" means, with respect to any Person, any indebtedness of such
Person, whether or not contingent, in respect of borrowed money or evidenced by
bonds, debentures, notes or similar instruments or letters of credit (or
reimbursement agreements in respect thereof) or banker's acceptances or
representing Capital Lease Obligations or the balance deferred and unpaid of the
purchase price of any property or representing any Hedging Obligations, except
any such balance that constitutes an accrued expense or trade payable, if and to
the extent any of the foregoing indebtedness (other than letters of credit and
Hedging Obligations) would appear as a liability upon a balance sheet of such
Person prepared in accordance with GAAP. The amount of any Indebtedness
outstanding as of any date shall be (a) the accreted value thereof, in the case
of any Indebtedness that does not require current payments of interest, and (b)
the principal amount thereof, in the case of any other Indebtedness.

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

     "Indirect Participant" means a Person who holds an interest through a
Participant.

     "Initial Purchaser" means each initial purchaser of Notes identified as
such in a Registration Rights Agreement.

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

     "Investments" means, with respect to any Person, all investments by such
Person in other Persons (including Affiliates) in the forms of direct or
indirect loans (including guarantees by the referent Person of, and Liens on any
assets of the referent Person securing, Indebtedness or other obligations of
other Persons), advances or capital contributions (excluding commission, travel
and similar advances to officers and employees made in the ordinary course of
business), purchases or other acquisitions for consideration of Indebtedness,
Equity Interests or other securities, together with all items that are or would
be classified as investments on a balance sheet prepared in accordance with
GAAP; provided, however, that the following shall not constitute Investments:
(i) extensions of trade credit or other advances to customers on commercially
reasonable terms in accordance with normal trade practices or otherwise in the
ordinary course of business, (ii) Hedging Obligations and (iii) endorsements of
negotiable instruments and documents in the ordinary course of business.  If the
Company or any Restricted Subsidiary of the Company sells or otherwise disposes
of any Equity Interests of any direct or indirect Restricted Subsidiary of the
Company such that, after giving effect to any such sale or disposition, such
Person is no longer a Restricted Subsidiary of the Company, the Company shall be
deemed to have made an Investment on the date of any such sale or disposition
equal to the fair market value of the Equity Interests of such Restricted
Subsidiary not sold or disposed of in an amount determined as provided in the
final paragraph of the covenant described in Section 4.07 of this Indenture.

     "Issue Date" means the first date on which the Offered Notes are issued
hereunder.

     "Legal Holiday" means a Saturday, a Sunday or a day on which banking
institutions in the City of Houston, Texas, the City of New York or at a place
of payment are authorized by law,

                                      -9-
<PAGE>

regulation or executive order to remain closed. If a payment date is a Legal
Holiday at a place of payment, payment may be made at that place on the next
succeeding day that is not a Legal Holiday, and no interest shall accrue for the
intervening period.

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

     "Liquidated Damages" means all liquidated damages then owing to any Holder
pursuant to a Registration Rights Agreement.

     "Make-Whole Amount" with respect to a Note means an amount equal to the
excess, if any, of (i) the present value of the remaining interest, premium and
principal payments due on such Note as if such Note were redeemed on November
15, 2004, computed using a discount rate equal to the Treasury Rate plus 50
basis points, over (ii) the outstanding principal amount of such Note. "Treasury
Rate" is defined as the yield to maturity at the time of the computation of
United States Treasury securities with a constant maturity (as compiled by and
published in the most recent Federal Reserve Statistical Release H.15(519),
which has become publicly available at least two Business Days prior to the date
of the redemption notice or, if such Statistical Release is no longer published,
any publicly available source of similar market date) most nearly equal to the
then remaining maturity of the Notes assuming redemption of the Notes on
November 15, 2004; provided, however, that if the Make-Whole Average Life of
such Note is not equal to the constant maturity of the United States Treasury
security for which a weekly average yield is given, the Treasury Rate shall be
obtained by linear interpolation (calculated to the nearest one-twelfth of a
year) from the weekly average yields of United States Treasury securities for
which such yields are given, except that if the Make-Whole Average Life of such
Notes is less than one year, the weekly average yield on actually traded United
States Treasury securities adjusted to a constant maturity of one year shall be
used.  "Make-Whole Average Life" means the number of years (calculated to the
nearest one-twelfth) between the date of redemption and November 15, 2004.

     "Make-Whole Price" with respect to a Note means the greater of (i) the sum
of the outstanding principal amount and Make-Whole Amount of such Note, and (ii)
the redemption price of such Note on November 15, 2004, determined pursuant to
the Indenture (105.875% of the principal amount).

     "Net Income" means, with respect to any Person, the net income (loss) of
such Person, determined in accordance with GAAP and before any reduction in
respect of preferred stock dividends, excluding, however, (a) any gain (but not
loss), together with any related provision for taxes on such gain (but not
loss), realized in connection with (i) any Asset Sale (including, without
limitation, dispositions pursuant to sale-and-leaseback transactions) or (ii)
the disposition of any securities by such Person or any of its Restricted
Subsidiaries or the extinguishment of any

                                      -10-
<PAGE>

Indebtedness of such Person or any of its Restricted Subsidiaries and (b) any
extraordinary or nonrecurring gain (but not loss), together with any related
provision for taxes on such extraordinary or nonrecurring gain (but not loss).

     "Net Proceeds" means the aggregate cash proceeds received by the Company or
any of its Restricted Subsidiaries in respect of any Asset Sale (including,
without limitation, any cash received upon the sale or other disposition of any
non-cash consideration received in any Asset Sale), net of (without duplication)
(a) the direct costs relating to such Asset Sale (including, without limitation,
legal, accounting and investment banking fees, sales commissions, recording
fees, title transfer fees, title insurance premiums, appraiser fees and costs
incurred in connection with preparing such asset for sale) and any relocation
expenses incurred as a result thereof, (b) taxes paid or estimated to be payable
as a result thereof (after taking into account any available tax credits or
deductions and any tax sharing arrangements), (c) amounts required to be applied
to the repayment of Indebtedness (other than under the Credit Facility) secured
by a Lien on the asset or assets that were the subject of such Asset Sale and
(d) any reserve established in accordance with GAAP or any amount placed in
escrow, in either case for adjustment in respect of the sale price of such asset
or assets, until such time as such reserve is reversed or such escrow
arrangement is terminated, in which case Net Proceeds shall include only the
amount of the reserve so reserved or the amount returned to the Company or its
Restricted Subsidiaries from such escrow arrangement, as the case may be.

     "Non-Recourse Debt" means Indebtedness (a) as to which neither the Company
nor any of its Restricted Subsidiaries (i) provides credit support of any kind
(including any undertaking, agreement or instrument that would constitute
Indebtedness) or is otherwise directly or indirectly liable (as a guarantor or
otherwise) or (ii) constitutes the lender, (b) no default with respect to which
(including any rights that the holders thereof may have to take enforcement
action against an Unrestricted Subsidiary) would permit (upon notice, lapse of
time or both) the holders of Indebtedness of the Company or any of its
Restricted Subsidiaries to declare a default on such Indebtedness or cause the
payment thereof to be accelerated or payable prior to its Stated Maturity and
(c) as to which the lenders have been notified in writing that they will not
have any recourse to the stock or assets of the Company or any of its Restricted
Subsidiaries, except to the extent of any Indebtedness incurred by the Company
or any of its Restricted Subsidiaries in accordance with clause (a)(i) above.

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

     "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.

     "Offered Notes" has the meaning set forth in Section 2.02 hereof.

     "Officer" means, with respect to any Person, the Chairman of the Board, the
Chief Executive Officer, the President, the Chief Operating Officer, the Chief
Financial Officer, the Treasurer, any Assistant Treasurer, the Controller, the
Secretary or any Vice-President of such Person.

                                      -11-
<PAGE>

     "Officers' Certificate" means a certificate signed on behalf of the Company
by two Officers of the Company, one of whom must be the principal executive
officer, the principal financial officer, the treasurer or the principal
accounting officer of the Company, that meets the requirements of Section 11.05
hereof.

     "Opinion of Counsel" means an opinion from legal counsel who is reasonably
acceptable to the Trustee, that meets the requirements of Section 11.05 hereof.
The counsel may be an employee of or counsel to the Company, any Subsidiary of
the Company or the Trustee.

     "Pari Passu Indebtedness" means, with respect to any Net Proceeds from
Asset Sales, Indebtedness of the Company and its Restricted Subsidiaries the
terms of which require the Company or such Restricted Subsidiary to apply such
Net Proceeds to offer to repurchase such Indebtedness.

     "Participant" means with respect to DTC, Euroclear or Cedel, a Person who
has an account with DTC, Euroclear or Cedel, respectively (and, with respect to
DTC, shall include Euroclear and Cedel).

     "Permitted Indebtedness" means:

          (a) the incurrence by the Company or a Restricted Subsidiary of
     Indebtedness under any Working Capital Facility in an aggregate principal
     amount at any one time outstanding not to exceed the greater of (i) $125.0
     million and (ii) an amount equal to the sum of 85% of the book value of
     accounts receivable (less allowance for doubtful accounts) and 70% of the
     inventory (less applicable reserves) of the Company and its Restricted
     Subsidiaries, calculated on a consolidated basis and in accordance with
     GAAP, plus $10.0 million and any fees, premiums, expenses (including costs
     of collection), indemnities and similar amounts payable in connection with
     such Indebtedness, and less any amounts repaid permanently in accordance
     with Section 4.10 hereof;

          (b) the incurrence by the Company and its Restricted Subsidiaries of
     Existing Indebtedness;

          (c) the incurrence by the Company and its Restricted Subsidiaries of
     Hedging Obligations;

          (d) the incurrence by the Company of Indebtedness represented by the
     Offered Notes and any Series B Notes that may be issued in exchange for an
     equal principal amount of Series A Notes pursuant to a Registration Rights
     Agreement;

          (e) the incurrence of intercompany Indebtedness between or among the
     Company and any of its Restricted Subsidiaries, provided that (i) if the
     Company or any Guarantor is the obligor on such Indebtedness, such
     Indebtedness is expressly subordinate to the payment in full of all
     obligations with respect to the Notes and (ii) (A) any subsequent issuance
     or transfer of Equity Interests that results in any such Indebtedness being
     held by a Person other

                                      -12-
<PAGE>

     than the Company or a Restricted Subsidiary of the Company, or (B) any sale
     or other transfer of any such Indebtedness to a Person that is neither the
     Company nor a Restricted Subsidiary of the Company, shall be deemed to
     constitute an incurrence of such Indebtedness by the Company or such
     Restricted Subsidiary, as the case may be;

          (f) Indebtedness in respect of bid, performance or surety bonds issued
     for the account of the Company or any Restricted Subsidiary thereof in the
     ordinary course of business, including guarantees or obligations of the
     Company or any Restricted Subsidiary thereof with respect to letters of
     credit supporting such bid, performance or surety obligations (in each case
     other than for an obligation for money borrowed);

          (g) the incurrence by the Company or any of its Restricted
     Subsidiaries of Permitted Refinancing Debt in exchange for, or the net
     proceeds of which are used to extend, refinance, renew, replace, defease or
     refund Indebtedness that was permitted by the Indenture to be incurred
     (other than pursuant to clause (a) or (e) of this definition);

          (h) incurrence by any Subsidiary of the Company of a Subsidiary
     Guarantee;

          (i) incurrence of Non-Recourse Debt; or

          (j) incurrence by the Company or any Restricted Subsidiary of any
     additional Indebtedness not to exceed $15.0 million at any time
     outstanding.

In the event that the incurrence of any Indebtedness would be permitted under
Section 4.09 hereof or one or more of the provisions of this definition, the
Company may designate (in the form of an Officers' Certificate delivered to the
Trustee) the particular provision of this Indenture pursuant to which it is
incurring such Indebtedness.

     "Permitted Investments" means (a) any Investment in the Company or in a
Restricted Subsidiary of the Company, (b) any Investment in Cash Equivalents,
(c) any Investment by the Company or any Restricted Subsidiary of the Company in
a Person if as a result of such Investment (i) such Person becomes a Restricted
Subsidiary of the Company or (ii) such Person is merged, consolidated or
amalgamated with or into, or transfers or conveys all or substantially all of
its assets to, or is liquidated into, the Company or a Restricted Subsidiary of
the Company, (d) any Investment made as a result of the receipt of non-cash
consideration from (i) an Asset Sale that was made pursuant to and in compliance
with Section 4.10 hereof or (ii) a disposition of assets that does not
constitute an Asset Sale, (e) acquisition of assets solely in exchange for the
issuance of Equity Interests (other than Disqualified Stock) of the Company and
(f) Investments in a Person engaged in the Principal Business, provided that the
aggregate amount of such Investments pursuant to this clause (f) in Persons that
are not Restricted Subsidiaries of the Company shall not exceed $30.0 million at
any one time.

     "Permitted Liens" means (a) Liens securing Indebtedness incurred pursuant
to clause (a) of the definition of "Permitted Indebtedness," (b) Liens in favor
of the Company or any of its Restricted Subsidiaries, (c) Liens on property of a
Person existing at the time such Person is merged into or

                                      -13-
<PAGE>

consolidated with the Company or any Restricted Subsidiary of the Company,
provided that such Liens were in existence prior to the contemplation of such
merger or consolidation and do not extend to any property other than those of
the Person merged into or consolidated with the Company or any of its Restricted
Subsidiaries, (d) Liens on property existing at the time of acquisition thereof
by the Company or any Restricted Subsidiary of the Company, provided that such
Liens were in existence prior to the contemplation of such acquisition and do
not extend to any other property, (e) Liens to secure the performance of
statutory obligations, surety or appeal bonds, bid or performance bonds,
insurance obligations or other obligations of a like nature incurred in the
ordinary course of business, (f) Liens securing Hedging Obligations, (g) Liens
existing on the Issue Date, (h) Liens securing Non-Recourse Debt, (i) any
interest or title of a lessor under a Capital Lease Obligation or an operating
lease, (j) Liens arising by reason of deposits necessary to obtain standby
letters of credit in the ordinary course of business (including deposits
necessary to obtain standby letters of credit), (k) Liens incurred or deposits
made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of social security and
related benefits, (l) easements, rights of way restrictions and other similar
charges or encumbrances not interfering in any material respect with the
business of the Company or any Restricted Subsidiary, (m) any other Liens
imposed by operation of law which do not materially affect the Company's or any
Guarantor's ability to perform its obligations under the Notes or any Subsidiary
Guarantee, (n) any attachment or judgment Lien, unless the judgment it secures
shall not, within 60 days after the entry thereof, have been discharged or
execution thereof stayed pending appeal, or shall not have been discharged
within 60 days after the expiration of any such stay, (o) Liens to secure
Purchase Money Indebtedness, which Liens shall not extend to any other property
or assets of the Company or a Restricted Subsidiary (other than any associated
accounts, contracts and insurance proceeds), (p) Liens securing Permitted
Refinancing Indebtedness with respect to any Indebtedness referred to in clause
(o) above, and (q) Liens incurred in the ordinary course of business of the
Company or any Restricted Subsidiary of the Company with respect to obligations
that do not exceed $5.0 million at any one time outstanding and that (i) are not
incurred in connection with the borrowing of money or the obtaining of advances
or credit (other than trade credit in the ordinary course of business) and (ii)
do not in the aggregate materially detract from the value of the property or
materially impair the use thereof in the operation of business by the Company or
such Restricted Subsidiary.

     "Permitted Refinancing Indebtedness" means any Indebtedness of the Company
or any of its Restricted Subsidiaries issued in exchange for, or the net
proceeds of which are used to extend, refinance, renew, replace, defease or
refund other Indebtedness of the Company or any of its Restricted Subsidiaries;
provided, however, that (a) the principal amount (or accreted value, if
applicable) of such Permitted Refinancing Indebtedness does not exceed the
principal amount of (or accreted value, if applicable), plus premium, if any,
and accrued interest on, the Indebtedness so extended, refinanced, renewed,
replaced, defeased or refunded (plus the amount of reasonable expenses incurred
in connection therewith), (b) such Permitted Refinancing Indebtedness has a
final maturity date no earlier than the final maturity date of, and has a
Weighted Average Life to Maturity equal to or greater than the Weighted Average
Life to Maturity of, the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded, (c) if the Indebtedness being extended,
refinanced, renewed, replaced, defeased or refunded is subordinated in right of
payment to the Notes, such Permitted Refinancing Indebtedness is subordinated in
right of payment to the Notes on terms at least as favorable, taken as a whole,
to the Holders of Notes as those contained in the

                                      -14-
<PAGE>

documentation governing the Indebtedness being extended, refinanced, renewed,
replaced, defeased or refunded and (d) such Indebtedness is incurred either by
the Company or by the Restricted Subsidiary that is the obligor on the
Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; provided, however, that a Restricted Subsidiary that is also a
Guarantor may guarantee Permitted Refinancing Indebtedness incurred by the
Company, whether or not such Restricted Subsidiary was an obligor or guarantor
of the Indebtedness being extended, refinanced, renewed, replaced, defeased or
refunded; provided, further, however, that if such Permitted Refinancing
Indebtedness is subordinated to the Notes, such guarantee shall be subordinated
to such Restricted Subsidiary's Subsidiary Guarantee to at least the same
extent.

     "Person" means any individual, corporation, partnership, limited liability
company, joint venture, association, joint-stock company, trust, unincorporated
organization or government or agency or political subdivision thereof (including
any subdivision or ongoing business of any such entity or substantially all of
the assets of any such entity, subdivision or business).

     "Principal Business" means (a) the business of the exploration for, and
development, acquisition, production, processing, marketing, refining, storage
and transportation of, hydrocarbons, (b) any related energy and natural resource
business, (c) any business currently engaged in by the Company or its
Subsidiaries, (d) convenience stores, retails service stations, truck stops and
other public accommodations in connection therewith and (e) any activity or
business that is a reasonable extension, development or expansion of any of the
foregoing.

     "Purchase Money Indebtedness" means Indebtedness incurred for the purpose
of (a) financing all or any part of the purchase price of any real or personal
property or assets incurred prior to, at the time of, or within 120 days after,
the acquisition of such property or (ii) financing all or any part of the cost
of construction of any such property or assets, provided that the amount of any
such financing shall not exceed the amount expended in the acquisition of, or
the construction of, such property or assets.

     "QIB" means a "qualified institutional buyer" as defined in Rule 144A under
the Securities Act.

     "Qualified Equity Offering" means (a) any sale of Equity Interests (other
than Disqualified Stock) of the Company pursuant to an underwritten offering
registered under the Securities Act or (b) any sale of Equity Interests (other
than Disqualified Stock) of the Company so long as, at the time of consummation
of such sale, the Company has a class of common equity securities registered
pursuant to Section 12(b) or Section 12(g) under the Exchange Act.

     "Registration Rights Agreement" means any agreement similar to the 1998
Registration Rights Agreement that the Company may enter into in relation to any
Series A Notes sold in reliance on Rule 144A or another exemption from the
registration requirements of the Securities Act, as such agreement may be
amended, modified or supplemented from time to time.

     "Regulation S" means Regulation S under the Securities Act.

                                      -15-
<PAGE>

     "Regulation S Global Note" means a Regulation S Temporary Global Note or
Regulation S Permanent Global Note, as appropriate.

     "Regulation S Permanent Global Note" means a permanent senior global note
that contains the paragraph referred to in footnote 1 and the additional
schedule referred to in footnote 4 to the form of the Note attached hereto as
Exhibit A-1, and that is deposited with the Note Custodian and registered in the
name of the Depository, representing a series of Notes sold in reliance on
Regulation S.

     "Regulation S Temporary Global Note" means a single temporary global senior
note in the form of the Note attached hereto as Exhibit A-2 that is deposited
with the Note Custodian and registered in the name of the Depository,
representing a series of Notes sold in reliance on Regulation S.

     "Responsible Officer," when used with respect to the Trustee, means any
officer within the Corporate Trust Department of the Trustee (or any successor
department of the Trustee) or any other officer of the Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate trust matter,
any other officer to whom such matter is referred because of his knowledge of
and familiarity with the particular subject.

     "Restricted Beneficial Interest" means any beneficial interest of a
Participant or Indirect Participant in a Restricted Global Note.

     "Restricted Definitive Notes" means the Definitive Notes that are required
to bear the legend set forth in Section 2.06(f) hereof.

     "Restricted Global Notes" means the 144A Global Note and the Regulation S
Global Note, each of which is required to bear the legend set forth in Section
2.06(f) hereof.

     "Restricted Investment" means an Investment other than a Permitted
Investment.

     "Restricted Subsidiary" of a Person means any Subsidiary of such Person
that is not an Unrestricted Subsidiary.

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

     "SEC" or "Commission" means the Securities and Exchange Commission.

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

     "Stated Maturity" means, with respect to any installment of interest or
principal on any series of Indebtedness, the date on which such payment of
interest or principal was scheduled to be paid in the original documentation
governing such Indebtedness, and shall not include any contingent

                                      -16-
<PAGE>

obligations to repay, redeem or repurchase any such interest or principal prior
to the date originally scheduled for the payment thereof.

     "Subsidiary" means, with respect to any Person, (a) any corporation,
association or other business entity of which more than 50% of the total voting
power of shares of Capital Stock entitled (without regard to the occurrence of
any contingency) to vote in the election of directors, managers or trustees
thereof is at the time owned or controlled, directly or indirectly, by such
Person or one or more of the other Subsidiaries of that Person (or a combination
thereof) and (b) any partnership (i) the sole general partner or the managing
general partner of which is such Person or a Subsidiary of such Person or (ii)
the only general partners of which are such Person or of one or more
Subsidiaries of such Person (or any combination thereof).

     "Subsidiary Guarantees" means the joint and several guarantees that may be
issued by all of the Guarantors pursuant to Article 10 hereof.

     "TIA" means the Trust Indenture Act of 1939 (15 U.S.C. (S)(S) 77aaa-77bbbb)
as in effect on the date on which this Indenture is qualified under the TIA.

     "Transaction" means the proposed acquisition of the El Dorado refinery to
be effected pursuant to that certain Asset Purchase and Sale Agreement, dated as
of October 19, 1999, among Frontier El Dorado Refining Company, the Company and
Equilon Enterprises LLC.

     "Transfer Restricted Securities" means securities (other than the Offered
Notes) that bear or are required to bear the legend set forth in Section 2.06(f)
hereof.

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

     "Unrestricted Global Notes" means one or more Global Notes that do not and
are not required to bear the legend set forth in Section 2.06(f) hereof.

     "Unrestricted Subsidiary" means any Subsidiary that is designated by the
Board of Directors as an Unrestricted Subsidiary pursuant to a resolution of the
Board of Directors, but only to the extent that such Subsidiary at the time of
such designation (a) has no Indebtedness other than Non-Recourse Debt, (b) is
not party to any agreement, contract, arrangement or understanding with the
Company or any Restricted Subsidiary of the Company unless such agreement,
contract, arrangement or understanding does not violate the terms of this
Indenture described in Section 4.11 hereof, and (c) is a Person with respect to
which neither the Company nor any of its Restricted Subsidiaries has any direct
or indirect obligation (i) to subscribe for additional Equity Interests or (ii)
to maintain or preserve such Person's financial condition or to cause such
Person to achieve any specified levels of operating results, in each case,
except to the extent otherwise permitted by this Indenture.  Any such
designation by the Board of Directors shall be evidenced to the Trustee by
filing with the Trustee a certified copy of the resolution of the Board of
Directors giving effect to such designation and an Officers' Certificate
certifying that such designation complied with the

                                      -17-
<PAGE>

foregoing conditions and was permitted by Section 4.07 hereof. If, at any time,
any Unrestricted Subsidiary would fail to meet the foregoing requirements as an
Unrestricted Subsidiary, it shall thereafter cease to be an Unrestricted
Subsidiary for purposes of this Indenture and any Indebtedness of such
Subsidiary shall be deemed to be incurred by a Restricted Subsidiary of the
Company as of such date (and, if such Indebtedness is not permitted to be
incurred as of such date pursuant to Section 4.09 hereof, the Company shall be
in default of such covenant). The Board of Directors may at any time designate
any Unrestricted Subsidiary to be a Restricted Subsidiary, provided that such
designation shall be deemed to be an incurrence of Indebtedness by a Restricted
Subsidiary of the Company of any outstanding Indebtedness of such Unrestricted
Subsidiary and such designation shall only be permitted if (A) such Indebtedness
is permitted by Section 4.09 hereof, calculated on a pro forma basis as if such
designation had occurred at the beginning of the four-quarter reference period,
and (B) no Default or Event of Default would be in existence following such
designation.

     "Weighted Average Life to Maturity" means, when applied to any Indebtedness
at any date, the number of years obtained by dividing (a) the sum of the
products obtained by multiplying (i) the amount of each then remaining
installment, sinking fund, serial maturity or other required payments of
principal, including payment at final maturity, in respect thereof, by (ii) the
number of years (calculated to the nearest one-twelfth) that will elapse between
such date and the making of such payment, by (b) the then outstanding principal
amount of such Indebtedness.

     "Wholly Owned Restricted Subsidiary" of any Person means a Restricted
Subsidiary of such Person to the extent (a) all of the outstanding Capital Stock
or other ownership interests of which (other than directors' qualifying shares)
shall at the time be owned directly or indirectly by such Person or (b) such
Restricted Subsidiary is organized in a foreign jurisdiction and is required by
the applicable laws and regulations of such foreign jurisdiction to be partially
owned by the government of such foreign jurisdiction or individual or corporate
citizens of such foreign jurisdiction in order for such Restricted Subsidiary to
transact business in such foreign jurisdiction, provided that such Person,
directly or indirectly, owns the remaining Capital Stock or ownership interests
in such Restricted Subsidiary and, by contract or otherwise, controls the
management and business of such Restricted Subsidiary and derives the economic
benefits of ownership of such Restricted Subsidiary to substantially the same
extent as if such Restricted Subsidiary were a wholly owned Restricted
Subsidiary.

     "Working Capital Facility" includes the Credit Facility and any other
working capital facilities entered into by the Company or any of its Restricted
Subsidiaries, including any related notes, guarantees, collateral documents,
instruments and agreements executed in connection therewith, in each case as
amended, restated, modified, supplemented, extended, renewed, replaced,
refinanced or restructured from time to time, whether by the same or any other
agent or agents, lender or group of lenders, whether represented by one or more
agreements and whether one or more Subsidiaries are borrowers, or guarantors
thereunder or parties thereto.

                                      -18-
<PAGE>

Section 1.02. Other Definitions.

                                                                      Defined in
     Term                                                               Section
     ----                                                             ----------

     "Affiliate Transaction"........................................     4.11
     "Asset Sale Offer".............................................     3.09
     "Change of Control Offer"......................................     4.15
     "Change of Control Payment"....................................     4.15
     "Change of Control Payment Date"...............................     4.15
     "Covenant Defeasance"..........................................     8.03
     "DTC"..........................................................     2.03
     "Event of Default".............................................     6.01
     "Excess Proceeds"..............................................     4.10
     "incur" or "incurrence"........................................     4.09
     "Legal Defeasance".............................................     8.02
     "Offer Amount".................................................     3.09
     "Offer Period".................................................     3.09
     "Paying Agent".................................................     2.03
     "Payment Default"..............................................     6.01
     "Purchase Date"................................................     3.09
     "Registrar"....................................................     2.03
     "Restricted Payments"..........................................     4.07
     "Special Mandatory Redemption Date"............................     3.08

Section 1.03. Incorporation by Reference of Trust Indenture Act.

     Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture.  Any terms
incorporated in this Indenture that are defined by the TIA, defined by TIA
reference to another statute or defined by SEC rule under the TIA have the
meanings so assigned to them.

Section 1.04. Rules of Construction.

     Unless the context otherwise requires:

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

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

          (3)  "or" is not exclusive;

          (4) words in the singular include the plural, and in the plural
     include the singular;

          (5) provisions apply to successive events and transactions; and

                                      -19-
<PAGE>

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

                                   ARTICLE 2
                                   THE NOTES

Section 2.01. Form and Dating.

     The Notes and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A-1 or Exhibit A-2 hereto.  The Notes may
have notations, legends or endorsements required by law, stock exchange rule or
usage.  Each Note shall be dated the date of its authentication.  The Notes
shall be issued in denominations of $1,000 and integral multiples thereof.

     Regardless of their respective dates of original issue, all of the Series A
Notes and the Series B Notes shall be considered collectively to be a single
class for all purposes of this Indenture, including, without limitation,
waivers, amendments, redemptions and offers to purchase.

     The terms and provisions contained in the Notes shall constitute, and are
hereby expressly made, a part of this Indenture and the Company, the Guarantors
and the Trustee, by their execution and delivery of this Indenture, expressly
agree to such terms and provisions and to be bound thereby.

     (a) Global Notes.  Offered Notes shall be issued initially in the form of
one or more Unrestricted Global Notes, which shall be deposited on behalf of the
purchasers of the Offered Notes represented thereby with the Note Custodian and
registered in the name of the Depository or a nominee of the Depository, duly
executed by the Company and authenticated by the Trustee as hereinafter
provided.  The aggregate principal amount of the Unrestricted Global Notes may
from time to time be increased or decreased by adjustments made on the records
of the Trustee and the Depository or its nominee, as the case may be, in
connection with transfers of interests as hereinafter provided.

     Except as provided in Section 2.01(c), Series A Notes offered and sold to
QIBs in reliance on Rule 144A shall be issued initially in the form of one or
more 144A Global Notes, which shall be deposited on behalf of the purchasers of
the Series A Notes represented thereby with the Note Custodian and registered in
the name of the Depository or a nominee of the Depository, duly executed by the
Company and authenticated by the Trustee as hereinafter provided.  The aggregate
principal amount of the 144A Global Notes may from time to time be increased or
decreased by adjustments made on the records of the Trustee and the Depository
or its nominee, as the case may be, in connection with transfers of interests as
hereinafter provided.

     Series A Notes offered and sold in reliance on Regulation S, if any, shall
be issued initially in the form of the Regulation S Temporary Global Note, which
shall be deposited on behalf of the purchasers of the Series A Notes represented
thereby with the Note Custodian and registered in the name of the Depository or
the nominee of the Depository for the accounts of designated agents holding on
behalf of Euroclear or Cedel, duly executed by the Company and authenticated by
the

                                      -20-
<PAGE>

Trustee as hereinafter provided.  The "40-day restricted period" (as defined
in Regulation S) shall be terminated upon the receipt by the Trustee of (i) a
written certificate from the Depository, together with copies of certificates
from Euroclear and Cedel certifying that they have received certification of
non-United States beneficial ownership of 100% of the aggregate principal amount
of the Regulation S Temporary Global Note (except to the extent of any
beneficial owners thereof who acquired an interest therein pursuant to another
exemption from registration under the Securities Act and who will take delivery
of a beneficial ownership interest in a 144A Global Note, all as contemplated by
Section 2.06(a)(ii) hereof), and (ii) an Officers' Certificate from the Company.
Following the termination of the 40-day restricted period, beneficial interests
in the Regulation S Temporary Global Note shall be exchanged for beneficial
interests in one or more Regulation S Permanent Global Notes pursuant to the
Applicable Procedures.  Simultaneously with the authentication of Regulation S
Permanent Global Notes, the Trustee shall cancel the Regulation S Temporary
Global Note.  The aggregate principal amount of the Regulation S Temporary
Global Note and the Regulation S Permanent Global Notes may from time to time be
increased or decreased by adjustments made on the records of the Trustee and the
Depository or its nominee, as the case may be, in connection with transfers of
interests as hereinafter provided.

     Each Global Note shall represent such of the outstanding Notes as shall be
specified therein and each shall provide that it shall represent the aggregate
amount of outstanding Notes from time to time endorsed thereon and that the
aggregate amount of outstanding Notes represented thereby may from time to time
be reduced or increased, as appropriate, to reflect exchanges, redemptions and
transfers of interests.  Any endorsement of a Global Note to reflect the amount
of any increase or decrease in the amount of outstanding Notes represented
thereby shall be made by the Trustee or the Note Custodian, at the direction of
the Trustee, in accordance with instructions given by the Holder thereof as
required by Section 2.06 hereof.

     The provisions of the "Operating Procedures of the Euroclear System" and
"Terms and Conditions Governing Use of Euroclear" and the "Management
Regulations" and "Instructions to Participants" of Cedel shall be applicable to
interests in the Regulation S Temporary Global Note and the Regulation S
Permanent Global Notes, if any, that are held by Participants through Euroclear
or Cedel.  The Trustee shall have no obligation to notify Holders of any such
procedures or to monitor or enforce compliance with the same.

     (b) Book-Entry Provisions.  Participants shall have no rights either under
this Indenture with respect to any Global Note held on their behalf by the
Depository or by the Note Custodian as custodian for the Depository or under
such Global Note, and the Depository may be treated by the Company, the Trustee
and any Agent of the Company or the Trustee as the absolute owner of such Global
Note for all purposes whatsoever.  Notwithstanding the foregoing, nothing herein
shall prevent the Company, the Trustee or any Agent of the Company or the
Trustee from giving effect to any written certification, proxy or other
authorization furnished by the Depository or impair, as between the Depository
and its Participants, the operation of customary practices of such Depository
governing the exercise of the rights of an owner of a beneficial interest in any
Global Note.

     (c) Definitive Notes.  Series A Notes offered and sold to Institutional
Accredited Investors who are not QIBs otherwise than in reliance on
Regulation S, if any, or to QIBs who elect

                                      -21-
<PAGE>

to take their Series A Notes in definitive form shall be issued initially in the
form of Definitive Notes, duly executed by the Company and authenticated by the
Trustee as hereinafter provided.

Section 2.02. Execution and Authentication.

     One Officer shall sign the Notes for the Company by manual or facsimile
signature.  The Company's seal shall be reproduced on the Notes and may be in
facsimile form.

     If an Officer whose signature is on a Note no longer holds that office at
the time a Note is authenticated, the Note shall nevertheless be valid.

     A Note shall not be valid until authenticated by the manual signature of an
authorized signatory of the Trustee.  Such signature shall be conclusive
evidence that the Note has been authenticated under this Indenture.  The form of
Trustee's certificate of authentication to be borne by the Notes shall be
substantially as set forth in Exhibit A-1 or Exhibit A-2 hereto.

     Each Note shall be dated the date of its authentication.

     The Trustee shall authenticate (i) the Series A Notes for original issue on
the Issue Date in the aggregate principal amount of $190,000,000 (the "Offered
Notes"), (ii) additional Series A Notes for original issue from time to time
after the Issue Date in such additional principal amounts as may be set forth in
a written order of the Company as described in this sentence and (iii) the
Series B Notes from time to time for issue only in exchange for a like principal
amount of Series A Notes originally issued as Transfer Restricted Securities, in
each case upon a written order of the Company signed by one Officer, which
written order shall specify (a) the amount of Notes to be authenticated and the
date of original issue thereof, (b) whether the Notes are Series A Notes or
Series B Notes, (c) whether or not the Notes are Transfer Restricted Securities
and (d) the amount of Notes to be issued in global form or definitive form.

     The Trustee may appoint an authenticating agent acceptable to the Company
to authenticate Notes.  An authenticating agent may authenticate Notes whenever
the Trustee may do so.  Each reference in this Indenture to authentication by
the Trustee includes authentication by such agent. An authenticating agent has
the same rights as an Agent to deal with the Company, any Guarantor or an
Affiliate of the Company.

Section 2.03. Registrar and Paying Agent.

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

                                      -22-
<PAGE>

Company fails to appoint or maintain another entity as Registrar or Paying
Agent, the Trustee shall act as such. The Company shall enter into an
appropriate agency agreement with any Agent not a party to this Indenture, and
such agreement shall incorporate the TIA's provisions of this Indenture that
relate to such Agent. The Company or any of its Subsidiaries may act as Paying
Agent or Registrar.

     The Company initially appoints The Depository Trust Company ("DTC") to act
as Depository with respect to the Global Notes.

     The Company initially appoints the Trustee to act as the Registrar and
Paying Agent and to act as Note Custodian with respect to the Global Notes.

Section 2.04. Paying Agent to Hold Money in Trust.

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

Section 2.05. Holder Lists.

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

Section 2.06. Transfer and Exchange.

     (a) Transfer and Exchange of Global Notes.  The transfer and exchange of
Global Notes or beneficial interests therein shall be effected through the
Depository, in accordance with this Indenture and the Applicable Procedures.
Beneficial interests in a Global Note may be transferred to Persons who take
delivery thereof in the form of a beneficial interest in the same Global Note in
accordance with the Applicable Procedures and, in the case of a Transfer
Restricted Security, transfer restrictions set forth in the legend in subsection
(f) of this Section 2.06. Transfers of beneficial interests in the Global Notes
to Persons required to take delivery thereof in the form of an interest in
another Global Note shall be permitted as follows:

                                      -23-
<PAGE>

          (i)   144A Global Note to Regulation S Global Note. If, at any time,
     an owner of a beneficial interest in a 144A Global Note deposited with the
     Depository (or the Trustee as custodian for the Depository) wishes to
     transfer its beneficial interest in such 144A Global Note to a Person who
     is required or permitted to take delivery thereof in the form of an
     interest in a Regulation S Global Note, such owner shall, subject to the
     Applicable Procedures, exchange or cause the exchange of such interest for
     an equivalent beneficial interest in a Regulation S Global Note as provided
     in this Section 2.06(a)(i). Upon receipt by the Trustee of (A) instructions
     given in accordance with the Applicable Procedures from *a Participant
     directing the Trustee to credit or cause to be credited a beneficial
     interest in the Regulation S Global Note in an amount equal to the
     beneficial interest in the 144A Global Note to be transferred, (B) a
     written order given in accordance with the Applicable Procedures containing
     information regarding the Participant account of the Depository and the
     Euroclear or Cedel account to be credited with such increase and (C) in the
     case of Global Notes that are Transfer Restricted Securities, a certificate
     in the form of Exhibit B-1 hereto given by the owner of such beneficial
     interest stating that the transfer of such interest has been made in
     compliance with the transfer restrictions applicable to the Global Notes
     and pursuant to and in accordance with Rule 903 or Rule 904 of Regulation
     S, then the Trustee, as Registrar, shall instruct the Depository to reduce
     or cause to be reduced the aggregate principal amount of the applicable
     144A Global Note and to increase or cause to be increased the aggregate
     principal amount of the applicable Regulation S Global Note by the
     principal amount of the beneficial interest in the 144A Global Note to be
     transferred, to credit or cause to be credited to the account of the Person
     specified in such instructions, a beneficial interest in the Regulation S
     Global Note equal to the reduction in the aggregate principal amount of the
     144A Global Note, and to debit, or cause to be debited, from the account of
     the Person making such transfer the beneficial interest in the 144A Global
     Note that is being transferred.

          (ii)  Regulation S Global Note to 144A Global Note.  If, at any time,
     after the expiration of the 40-day restricted period, an owner of a
     beneficial interest in a Regulation S Global Note deposited with the
     Depository (or with the Trustee as custodian for the Depository) wishes to
     transfer its beneficial interest in such Regulation S Global Note to a
     Person who is required or permitted to take delivery thereof in the form of
     an interest in a 144A Global Note, such owner shall, subject to the
     Applicable Procedures, exchange or cause the exchange of such interest for
     an equivalent beneficial interest in a 144A Global Note as provided in this
     Section 2.06(a)(ii). Upon receipt by the Trustee of (A) instructions from
     Euroclear or Cedel, if applicable, and the Depository, directing the
     Trustee, as Registrar, to credit or cause to be credited a beneficial
     interest in the 144A Global Note equal to the beneficial interest in the
     Regulation S Global Note to be transferred, such instructions to contain
     information regarding the Participant account with the Depository to be
     credited with such increase, (B) a written order given in accordance with
     the Applicable Procedures containing information regarding the participant
     account of the Depository and (C) in the case of Global Notes that are
     Transfer Restricted Securities, a certificate in the form of Exhibit B-2
     attached hereto given by the owner of such beneficial interest stating (1)
     if the transfer is pursuant to Rule 144A, that the Person transferring such
     interest in a Regulation S Global Note reasonably believes that the Person
     acquiring such interest in a 144A Global Note is a QIB and is obtaining
     such beneficial interest in a transaction meeting the

                                      -24-
<PAGE>

     requirements of Rule 144A, (2) that the transfer complies with the
     requirements of Rule 144 under the Securities Act, (3) if the transfer is
     pursuant to any other exemption from the registration requirements of the
     Securities Act, that the transfer of such interest has been made in
     compliance with the transfer restrictions applicable to the Global Notes
     and pursuant to and in accordance with the requirements of the exemption
     claimed, such statement to be supported by an Opinion of Counsel from the
     transferee or the transferor in form reasonably acceptable to the Company
     and to the Registrar and in each case of clause (1), (2) or (3) above, in
     accordance with any applicable securities laws of any state of the United
     States or any other applicable jurisdiction or (4) such transfer is being
     effected pursuant to an effective registration statement under the
     Securities Act, then the Trustee, as Registrar, shall instruct the
     Depository to reduce or cause to be reduced the aggregate principal amount
     of such Regulation S Global Note and to increase or cause to be increased
     the aggregate principal amount of the applicable 144A Global Note by the
     principal amount of the beneficial interest in the Regulation S Global Note
     to be transferred, and the Trustee, as Registrar, shall instruct the
     Depository, concurrently with such reduction, to credit or cause to be
     credited to the account of the Person specified in such instructions a
     beneficial interest in the applicable 144A Global Note equal to the
     reduction in the aggregate principal amount of such Regulation S Global
     Note and to debit or cause to be debited from the account of the Person
     making such transfer the beneficial interest in the Regulation S Global
     Note that is being transferred.

     (b) Transfer and Exchange of Definitive Notes.  When Definitive Notes are
presented by a Holder to the Registrar with a request to register the transfer
of the Definitive Notes or to exchange such Definitive Notes for an equal
principal amount of Definitive Notes of other authorized denominations, the
Registrar shall register the transfer or make the exchange as requested only if
the Definitive Notes are presented or surrendered for registration of transfer
or exchange, are endorsed or accompanied by a written instrument of transfer in
form satisfactory to the Registrar duly executed by such Holder or by his
attorney, duly authorized in writing and the Registrar receives the following
documentation (all of which may be submitted by facsimile):

          (i)   in the case of Definitive Notes that are Transfer Restricted
     Securities, such request shall be accompanied by the following additional
     information and documents, as applicable:

                (A) if such Transfer Restricted Security is being delivered to
          the Registrar by a Holder for registration in the name of such Holder,
          without transfer, or such Transfer Restricted Security is being
          transferred (1) to the Company or any of its Subsidiaries or (2)
          pursuant to an effective registration statement under the Securities
          Act, a certification to that effect from such Holder (in substantially
          the form of Exhibit B-3 hereto);

                (B) if such Transfer Restricted Security is being transferred to
          a QIB in accordance with Rule 144A under the Securities Act or
          pursuant to an exemption from registration in accordance with Rule 144
          under the Securities Act or pursuant

                                      -25-
<PAGE>

          to an effective registration statement under the Securities Act, a
          certification to that effect from such Holder (in substantially the
          form of Exhibit B-3 hereto);

               (C) if such Transfer Restricted Security is being transferred to
          a Non-U.S. Person in an offshore transaction in accordance with Rule
          904 under the Securities Act, a certification to that effect from such
          Holder (in substantially the form of Exhibit B-3 hereto but containing
          the certification called for by clauses (1) through (4) of Exhibit B-1
          hereto); or

               (D) if such Transfer Restricted Security is being transferred to
          an Institutional Accredited Investor in reliance on an exemption from
          the registration requirements of the Securities Act other than those
          listed in subparagraph (B) or (C) above, a certification to that
          effect from such Holder (in substantially the form of Exhibit B-3
          hereto), and a certification substantially in the form of Exhibit C
          hereto from the transferee, and, if such transfer is in respect of an
          aggregate principal amount of Notes of less than $100,000, an Opinion
          of Counsel acceptable to the Company that such transfer is in
          compliance with the Securities Act and any applicable blue sky laws of
          any state of the United States.

     (c) Transfer of a Beneficial Interest in a 144A Global Note or Regulation S
Permanent Global Note for a Definitive Note.

          (i)   Any Person having a beneficial interest in a 144A Global Note or
     Regulation S Permanent Global Note may upon request, subject to the
     Applicable Procedures, exchange such beneficial interest for a Definitive
     Note, upon receipt by the Trustee of written instructions or such other
     form of instructions as is customary for the Depository (or Euroclear or
     Cedel, if applicable), from the Depository or its nominee on behalf of any
     Person having a beneficial interest in a 144A Global Note or Regulation S
     Permanent Global Note, and, in the case of a Transfer Restricted Security,
     the following additional information and documents (all of which may be
     submitted by facsimile):

                (A) if such beneficial interest is being transferred to the
          Person designated by the Depository as being the beneficial owner or
          to the Company or any of its Subsidiaries, a certification to that
          effect from such Person (in substantially the form of Exhibit B-4
          hereto);

                (B) if such beneficial interest is being transferred to a QIB in
          accordance with Rule 144A under the Securities Act or pursuant to an
          exemption from registration in accordance with Rule 144 under the
          Securities Act or pursuant to an effective registration statement
          under the Securities Act, a certification to that effect from the
          transferor (in substantially the form of Exhibit B-4 hereto);

                (C) if such beneficial interest is being transferred to a Non-
          U.S. Person in an offshore transaction in accordance with Rule 904
          under the Securities Act, a certification to that effect from the
          transferor (in substantially the form of Exhibit B-4

                                      -26-
<PAGE>

          hereto but containing the certification called for by clauses (1)
          through (4) of Exhibit B-1 hereto); or

                (D) if such beneficial interest is being transferred to an
          Institutional Accredited Investor, pursuant to a private placement
          exemption from the registration requirements of the Securities Act
          other than those listed in subparagraph (B) or (C) above, a
          certification to that effect from such Holder (in substantially the
          form of Exhibit B-4 hereto), a certification from the applicable
          transferee (in substantially the form of Exhibit C hereto) and, if
          such transfer is in respect of an aggregate principal amount of less
          than $100,000, an Opinion of Counsel acceptable to the Company that
          such transfer is in compliance with the Securities Act and any
          applicable blue sky laws of any State of the United States;

     in which case the Trustee or the Note Custodian, at the direction of the
     Trustee, shall, in accordance with the standing instructions and procedures
     existing between the Depository and the Note Custodian, cause the aggregate
     principal amount of 144A Global Notes or Regulation S Permanent Global
     Notes, as applicable, to be reduced accordingly and, following such
     reduction, the Company shall execute and, the Trustee shall authenticate
     and deliver to the transferee a Definitive Note in the appropriate
     principal amount.

          (ii)  Definitive Notes issued in exchange for a beneficial interest in
     a 144A Global Note or Regulation S Permanent Global Note, as applicable,
     pursuant to this Section 2.06(c) shall be registered in such names and in
     such authorized denominations as the Depository, pursuant to instructions
     from its direct or Indirect Participants or otherwise, shall instruct the
     Trustee.  The Trustee shall deliver such Definitive Notes to the Persons in
     whose names such Notes are so registered.  Following any such issuance of
     Definitive Notes, the Trustee, as Registrar, shall instruct the Depository
     to reduce or cause to be reduced the aggregate principal amount of the
     applicable Global Note to reflect the transfer.

     (d) Restrictions on Transfer and Exchange of Global Notes.  Notwithstanding
any other provision of this Indenture (other than the provisions set forth in
subsection (f) of this Section 2.06), a Global Note may not be transferred as a
whole except by the Depository to a nominee of the Depository or by a nominee of
the Depository to the Depository or another nominee of the Depository or by the
Depository or any such nominee to a successor Depository or a nominee of such
successor Depository.

     (e) Authentication of Definitive Notes in Absence of Depository.  If at any
time:

          (i)   the Depository for the Notes notifies the Company that the
     Depository is unwilling or unable to continue as Depository for the Global
     Notes and a successor Depository for the Global Notes is not appointed by
     the Company within 90 days after delivery of such notice; or

          (ii)  the Company, at its sole discretion, notifies the Trustee in
     writing that it elects to cause the issuance of Definitive Notes under this
     Indenture,

                                      -27-
<PAGE>

then the Company shall execute, and the Trustee shall, upon receipt of an
authentication order in accordance with Section 2.02 hereof, authenticate and
deliver, Definitive Notes in an aggregate principal amount equal to the
principal amount of the Global Notes in exchange for such Global Notes.

     (f)  Legends.

          (i)   Except as permitted by the following paragraphs (ii), (iii),
     (iv) and (v), each Note certificate evidencing a Global Note or a
     Definitive Note (and all Notes issued in exchange therefor or substitution
     thereof) shall bear a legend in substantially the following form:

               THE NOTE (OR ITS PREDECESSOR) EVIDENCED HEREBY HAS NOT BEEN
          REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
          "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY
          NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED EXCEPT AS SET FORTH IN
          THE FOLLOWING SENTENCE.  EACH PURCHASER OF THE NOTE EVIDENCED HEREBY
          IS HEREBY NOTIFIED THAT THE SELLER MAY BE RELYING ON THE EXEMPTION
          FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY
          RULE 144A THEREUNDER.  BY ITS ACQUISITION HEREOF, THE HOLDER:
          REPRESENTS THAT (1) IT IS (A) A "QUALIFIED INSTITUTIONAL BUYER" (AS
          DEFINED IN RULE 144A UNDER THE SECURITIES ACT) OR (B) AN INSTITUTIONAL
          "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2), (3) OR (7)
          UNDER THE SECURITIES ACT) ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C)
          NOT A U.S. PERSON AND IS ACQUIRING THE NOTE EVIDENCED HEREBY IN AN
          OFFSHORE TRANSACTION; (2) AGREES THAT IT WILL NOT RESELL OR OTHERWISE
          TRANSFER THE NOTE EVIDENCED HEREBY EXCEPT (A) TO THE COMPANY OR ANY
          SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN
          COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, (C) TO AN
          INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER,
          FURNISHES TO CHASE BANK OF TEXAS, NATIONAL ASSOCIATION, AS TRUSTEE (OR
          A SUCCESSOR TRUSTEE, AS APPLICABLE), A SIGNED LETTER CONTAINING
          CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON
          TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE
          OBTAINED FROM SUCH TRUSTEE OR A SUCCESSOR TRUSTEE, AS APPLICABLE), (D)
          OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE
          SECURITIES ACT, (E) PURSUANT TO THE EXEMPTION FROM REGISTRATION
          PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR IN
          ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
          OF THE SECURITIES ACT, OR (F) PURSUANT TO AN EFFECTIVE REGISTRATION
          STATEMENT UNDER THE SECURITIES ACT, AND IN EACH CASE, IN ACCORDANCE
          WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES
          OR ANY OTHER APPLICABLE JURISDICTION; AND (3) AGREES THAT IT WILL
          DELIVER TO EACH PERSON TO WHOM THE NOTE EVIDENCED HEREBY IS
          TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.  IF
          THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE (C), (D) OR (E) ABOVE, THE
          HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO CHASE BANK OF TEXAS,
          NATIONAL ASSOCIATION, AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS
          APPLICABLE), SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION
          AS IT MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING
          MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT
          TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.  AS USED
          HEREIN, THE TERMS "OFFSHORE TRANSACTIONS,"

                                      -28-
<PAGE>

          "UNITED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY
          REGULATION S UNDER THE SECURITIES ACT.

          (ii)  Upon any sale or transfer of a Transfer Restricted Security
     (including any Transfer Restricted Security represented by a Global Note)
     pursuant to Rule 144 under the Securities Act or pursuant to an effective
     registration statement under the Securities Act:

                (A) in the case of any Transfer Restricted Security that is a
          Definitive Note, the Registrar shall permit the Holder thereof to
          exchange such Transfer Restricted Security for a Definitive Note that
          does not bear the legend set forth in (i) above and rescind any
          restriction on the transfer of such Transfer Restricted Security upon
          certification from the transferring holder substantially in the form
          of Exhibit B-3 hereto; and

                (B) in the case of any Transfer Restricted Security represented
          by a Global Note, such Transfer Restricted Security shall not be
          required to bear the legend set forth in (i) above, but shall continue
          to be subject to the provisions of Section 2.06(a) and (c) hereof;
          provided, however, that with respect to any request for an exchange of
          a Transfer Restricted Security that is represented by a Global Note
          for a Definitive Note that does not bear the legend set forth in (i)
          above, which request is made in reliance upon Rule 144 or pursuant to
          an effective registration statement, the Holder thereof shall certify
          in writing to the Registrar that such request is being made pursuant
          to Rule 144 or pursuant to an effective registration statement (such
          certification to be substantially in the form of Exhibit B-4 hereto).

          (iii) Upon any sale or transfer of a Transfer Restricted Security
     (including any Transfer Restricted Security represented by a Global Note)
     in reliance on any exemption from the registration requirements of the
     Securities Act (other than exemptions pursuant to Rule 144 under the
     Securities Act) in which the Holder or the transferee provides an Opinion
     of Counsel to the Company and the Registrar in form and substance
     reasonably acceptable to the Company and the Registrar (which Opinion of
     Counsel shall also state that the transfer restrictions contained in the
     legend are no longer applicable):

                (A) in the case of any Transfer Restricted Security that is a
          Definitive Note, the Registrar shall permit the Holder thereof to
          exchange such Transfer Restricted Security for a Definitive Note that
          does not bear the legend set forth in (i) above and rescind any
          restriction on the transfer of such Transfer Restricted Security; and

                (B) in the case of any Transfer Restricted Security represented
          by a Global Note, such Transfer Restricted Security shall not be
          required to bear the legend set forth in (i) above, but shall continue
          to be subject to the provisions of Section 2.06(a) and (c) hereof.

          (iv)  Notwithstanding the foregoing, upon consummation of an Exchange
     Offer, the Company shall issue and, upon receipt of an authentication order
     in accordance with

                                      -29-
<PAGE>

     Section 2.02 hereof, the Trustee shall authenticate one or more
     Unrestricted Global Notes in aggregate principal amount equal to the sum of
     (A) the principal amount of the Restricted Beneficial Interests tendered
     for acceptance by Persons that are not (1) broker-dealers, (2) Persons
     participating in the distribution of the Series B Notes or (3) Persons who
     are Affiliates of the Company and accepted for exchange in the Exchange
     Offer and (B) the principal amount of the Restricted Definitive Notes
     accepted for exchange in the Exchange Offer, unless the Holders of such
     Restricted Definitive Notes shall request the receipt of Definitive Notes,
     in which case the Company shall execute and the Trustee shall authenticate
     and deliver to the Persons designated by the Holders of such Restricted
     Definitive Notes one or more Definitive Notes without the legend set forth
     in Section 2.06(f) in the appropriate principal amount. Concurrently with
     the issuance of such Unrestricted Global Notes, the Trustee shall cause the
     aggregate principal amount of the applicable Restricted Global Note to be
     reduced accordingly.

         (v)    No Note certificate evidencing an Offered Note shall bear the
     legend set forth in (i) above.

     (g) Cancellation and/or Adjustment of Global Notes.  At such time as all
beneficial interests in Global Notes have been exchanged for Definitive Notes,
redeemed, repurchased or canceled, all Global Notes shall be returned to or
retained and canceled by the Trustee in accordance with Section 2.11 hereof.  At
any time prior to such cancellation, if any beneficial interest in a Global Note
is exchanged for Definitive Notes, redeemed, repurchased or cancelled, the
principal amount of Notes represented by such Global Note shall be reduced
accordingly and an endorsement shall be made on such Global Note, by the Trustee
or the Note Custodian, at the direction of the Trustee, to reflect such
reduction.

     (h) General Provisions Relating to Transfers and Exchanges.

         (i)    To permit registrations of transfers and exchanges, subject to
     this Section 2.06, the Company shall execute and, upon the written order of
     the Company signed by one Officer of the Company, the Trustee shall
     authenticate Definitive Notes and Global Notes at the Registrar's request.

         (ii)   No service charge shall be made to a Holder for any registration
     of transfer or exchange, but the Company may require payment of a sum
     sufficient to cover any transfer tax or similar governmental charge payable
     in connection therewith (other than any such transfer taxes or similar
     governmental charge payable upon exchange or transfer pursuant to Sections
     3.07, 4.10, 4.15 and 9.05 hereof).

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

         (iv)   All Definitive Notes and Global Notes issued upon any
     registration of transfer or exchange of Definitive Notes or Global Notes
     shall be the valid obligations of the

                                      -30-
<PAGE>

     Company, evidencing the same debt, and entitled to the same benefits under
     this Indenture, as the Definitive Notes or Global Notes surrendered upon
     such registration of transfer or exchange.

         (v)    The Company and the Registrar shall not be required:

                (A) to issue, to register the transfer of or to exchange Notes
          during a period beginning at the opening of business 15 days before
          the day of any selection of Notes for redemption under Section 3.02
          hereof and ending at the close of business on the day of selection;

                (B) to register the transfer of or to exchange any Note so
          selected for redemption in whole or in part, except the unredeemed
          portion of any Note being redeemed in part;

                (C) to register the transfer of or to exchange a Note between a
          record date and the next succeeding interest payment date; or

                (D) to register the transfer of a Note other than in amounts of
          $1,000 or multiple integrals thereof.

         (vi)   Prior to due presentment for the registration of a transfer of
     any Note, the Trustee, any Agent and the Company may deem and treat the
     Person in whose name any Note is registered as the absolute owner of such
     Note for the purpose of receiving payment of principal of and interest on
     such Notes, and neither the Trustee, any Agent nor the Company shall be
     affected by notice to the contrary.

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

Section 2.07. Replacement Notes.

     If any mutilated Note is surrendered to the Trustee or the Company, or the
Trustee receives evidence to its satisfaction of the destruction, loss or theft
of any Note, the Company shall issue and the Trustee, upon the written order of
the Company signed by two Officers of the Company, shall authenticate a
replacement Note if the Trustee's requirements are met.  If required by the
Trustee or the Company, an indemnity bond must be supplied by the Holder that is
sufficient in the judgment of the Trustee and the Company to protect the
Company, the Trustee, any Agent and any authenticating agent from any loss that
any of them may suffer if a Note is replaced.  The Company may charge for its
expenses in replacing a Note.  If, after the delivery of such replacement Note,
a bona fide purchaser of the original Note in lieu of which such replacement
Note was issued presents for payment or registration such original Note, the
Trustee shall be entitled to recover such replacement Note from the Person to
whom it was delivered or any Person taking therefrom, except a bona fide
purchaser, and shall be entitled to recover upon the security or indemnity
provided

                                      -31-
<PAGE>

therefor to the extent of any loss, damage, cost or expense incurred by the
Company, the Trustee, any Agent and any authenticating agent in connection
therewith.

     Subject to the provisions of the final sentence of the preceding paragraph
of this Section 2.07, every replacement Note is an additional obligation of the
Company and shall be entitled to all of the benefits of this Indenture equally
and proportionately with all other Notes duly issued hereunder.

Section 2.08. Outstanding Notes.

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

     If a Note is replaced pursuant to Section 2.07 hereof, it ceases to be
outstanding unless the Trustee receives proof satisfactory to it that the
replaced Note is held by a bona fide purchaser.

     If the entire principal of and premium, interest and Liquidated Damages, if
any, on any Note are considered paid under Section 4.01 hereof, it ceases to be
outstanding and interest and Liquidated Damages, if any, on it cease to accrue.

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

Section 2.09. Treasury Notes.

     In determining whether the Holders of the required principal amount of
Notes have concurred in any direction, waiver or consent, Notes owned by the
Company, a Subsidiary of the Company or an Affiliate, shall be considered as
though not outstanding, except that for the purposes of determining whether the
Trustee shall be protected in relying on any such direction, waiver or consent,
only Notes that a Trustee knows are so owned shall be so disregarded.
Notwithstanding the foregoing, Notes that the Company, a Subsidiary of the
Company or an Affiliate offers to purchase or acquires pursuant to an offer,
exchange offer, tender offer or otherwise shall not be deemed to be owned by the
Company, a Subsidiary of the Company or an Affiliate until legal title to such
Notes passes to the Company, such Subsidiary or such Affiliate as the case may
be.

 Section 2.10. Temporary Notes.

     Until definitive Notes are ready for delivery, the Company may prepare and
the Trustee shall authenticate temporary Notes upon a written order of the
Company signed by two Officers of the Company.  Temporary Notes shall be
substantially in the form of definitive Notes but may have

                                      -32-
<PAGE>

variations that the Company considers appropriate for temporary Notes and as
shall be reasonably acceptable to the Trustee. Without unreasonable delay, the
Company shall prepare and the Trustee shall authenticate definitive Notes in
exchange for temporary Notes. Until such exchange, Holders of temporary Notes
shall be entitled to all of the benefits of this Indenture.

Section 2.11. Cancellation.

     The Company at any time may deliver Notes to the Trustee for cancellation.
The Registrar and Paying Agent shall forward to the Trustee any Notes
surrendered to them for registration of transfer, exchange or payment.  The
Trustee and no one else shall cancel all Notes surrendered for registration of
transfer, exchange, payment, replacement or cancellation and, at the request of
the Company, shall destroy canceled Notes (subject to the record retention
requirement of the Exchange Act).  Certification of the destruction of all
canceled Notes shall be delivered to the Company.  The Company may not issue new
Notes to replace Notes that it has paid or that have been delivered to the
Trustee for cancellation, other than as contemplated by the Exchange Offer.

Section 2.12. Defaulted Interest.

     If the Company defaults in a payment of interest on the Notes, it shall pay
the defaulted interest in any lawful manner plus, to the extent lawful, interest
payable on the defaulted interest, to the Persons who are Holders on a
subsequent special record date, in each case at the rate provided in the Notes
and in Section 4.01 hereof.  The Company shall notify the Trustee in writing of
the amount of defaulted interest proposed to be paid on each Note and the date
of the proposed payment. The Company shall fix or cause to be fixed each such
special record date and payment date, provided, however, that no such special
record date shall be less than 10 days prior to the related payment date for
such defaulted interest.  At least 15 days before the special record date, the
Company (or, upon the written request of the Company, the Trustee in the name
and at the expense of the Company) shall mail or cause to be mailed to Holders a
notice that states the special record date, the related payment date and the
amount of such interest to be paid.

                                   ARTICLE 3
                           REDEMPTION AND PREPAYMENT

Section 3.01. Notices to Trustee.

     If the Company elects to redeem Notes pursuant to the redemption provisions
of Section 3.07 or 3.08 hereof, it shall furnish to the Trustee, at least 35
days (or such shorter period as may be acceptable to the Trustee) but not more
than 60 days before a redemption date, an Officers' Certificate setting forth
(i) the clause of this Indenture pursuant to which the redemption shall occur,
(ii) the redemption date, (iii) the principal amount of Notes to be redeemed and
(iv) the redemption price.

                                      -33-
<PAGE>

Section 3.02. Selection of Notes to Be Redeemed.

     If less than all of the Notes are to be redeemed at any time, the Trustee
shall select the Notes to be redeemed among the Holders of the Notes, on a pro
rata basis, by lot or in accordance with any other method the Trustee considers
fair and appropriate.  In the event of partial redemption by lot, the particular
Notes to be redeemed shall be selected, unless otherwise provided herein, not
less than 30 days nor more than 60 days prior to the redemption date by the
Trustee from the outstanding Notes not previously called for redemption.

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

     The provisions of the two preceding paragraphs of this Section 3.02 shall
not apply with respect to any redemption affecting only a Global Note, whether
such Global Note is to be redeemed in whole or in part.  In case of any such
redemption in part, the unredeemed portion of the principal amount of the Global
Note shall be in an authorized denomination.

Section 3.03. Notice of Redemption.

     Subject to the provisions of Section 3.09 hereof, at least 30 days (or such
shorter period as may be acceptable to DTC in the case of a mandatory
redemption) but not more than 60 days before a redemption date, the Company
shall mail or cause to be mailed, by first class mail, a notice of redemption to
each Holder whose Notes are to be redeemed at its registered address.

     The notice shall identify the Notes to be redeemed and shall state:

         (a) the redemption date;

         (b) the redemption price;

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

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

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

                                      -34-
<PAGE>

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

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

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

     If any of the Notes to be redeemed is in the form of a Global Note, then
the Company shall modify such notice to the extent necessary to accord with the
procedures of the Depository applicable to redemption.

     At the Company's request, the Trustee shall give the notice of redemption
in the Company's name and at its expense; provided, however, that the Company
shall have delivered to the Trustee, at least 45 days (unless the Company and
the Trustee agree to a shorter period) prior to the redemption date, an
Officers' Certificate requesting that the Trustee give such notice and setting
forth the information to be stated in such notice as provided in the preceding
paragraph.

Section 3.04. Effect of Notice of Redemption.

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

Section 3.05. Deposit of Redemption Price.

     At least one Business Day prior to any optional redemption date, the
Company shall deposit with the Paying Agent (or, if the Company is acting as its
own Paying Agent, segregate and hold in trust as provided in Section 2.04
hereof) money sufficient to pay the redemption price of and accrued interest and
Liquidated Damages, if any, on all Notes to be redeemed on that date.  Money
sufficient to pay the redemption price of and accrual interest on the Offered
Notes on the Special Mandatory Redemption Date, if any, shall be deposited with
the Paying Agent in accordance with the Escrow Agreement.  The Paying Agent
shall promptly pay to the Company any money deposited with the Paying Agent in
excess of the amounts necessary to pay the redemption price of and accrued
interest and Liquidated Damages, if any, on all Notes to be redeemed.

     If the Company complies with the provisions of the preceding paragraph, on
and after the redemption date, interest and Liquidated Damages, if any, shall
cease to accrue on the Notes or the portions of Notes called for redemption.  If
a Note is redeemed on or after an interest record date but on or prior to the
related interest payment date, then any accrued and unpaid interest and
Liquidated Damages, if any, shall be paid to the Person in whose name such Note
was registered at the close of business on such record date.  If any Note called
for redemption shall not be so paid upon surrender for redemption because of the
failure of the Company to comply with the preceding

                                      -35-
<PAGE>

paragraph, interest shall be paid on the unpaid principal, from the redemption
date until such principal is paid, and to the extent lawful on any interest and
Liquidated Damages, if any, not paid on such unpaid principal, in each case at
the rate provided in the Notes and in Section 4.01 hereof.

Section 3.06. Notes Redeemed in Part.

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

Section 3.07. Optional Redemption.

     (a) Except as set forth in clause (b) of this Section 3.07, the Company
shall not have the option to redeem the Notes pursuant to this Section 3.07
prior to November 15, 2004.  Thereafter, the Company shall have the option to
redeem the Notes, in whole or in part, at the redemption prices (expressed as
percentages of principal amount) set forth below plus accrued and unpaid
interest and Liquidated Damages, if any, thereon, to the applicable redemption
date, if redeemed during the twelve-month period beginning on November 15 of the
years indicated below:

          YEAR                                        PERCENTAGE
          ----                                        ----------

          2004                                          105.875%
          2005                                          103.916%
          2006                                          101.958%
          2007 and thereafter                           100.000%

     (b) Notwithstanding the provisions of clause (a) of this Section 3.07, the
Company may at any time prior to November 15, 2004, at its option, redeem the
Notes, in whole or in part, at the Make-Whole Price, plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the redemption date.  In
addition, at any time prior to November 15, 2002, the Company may redeem up to
35% of the aggregate principal amount of Notes originally issued at a redemption
price of 111.75% of the principal amount thereof, plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the redemption date, with
the net cash proceeds of one or more Qualified Equity Offerings, provided that
(i) at least 65% of the aggregate principal amount of Notes originally issued
remains outstanding immediately after the occurrence of each such redemption and
(ii) each such redemption shall occur within 60 days of the date of the closing
of each such Qualified Equity Offering.

     (c) Any redemption pursuant to this Section 3.07 or Section 3.08(b) shall
be made pursuant to the provisions of Section 3.01 through Section 3.06 hereof.

                                      -36-
<PAGE>

Section 3.08. Mandatory Redemption.

     (a) Except as set forth in clause (b) of this Section 3.08 or under
Sections 4.10 and 4.15 hereof, the Company shall not be required to make
mandatory redemption or sinking fund payments with respect to the Notes.

     (b) In accordance with the terms and conditions of the Escrow Agreement and
using the Deposit, the Company shall redeem all of the Offered Notes on January
11, 2000, or such earlier date as the Company shall elect (the "Special
Mandatory Redemption Date"), if the Transaction has not closed on or prior to
the Special Mandatory Redemption Date, at a redemption price equal to $995.4762
per $1,000 principal amount of Offered Notes, plus 101% of the amount of
accretion to the Special Mandatory Redemption Date of the original issue
discount of $14.38 per $1,000 principal amount of Offered Notes, plus accrued
and unpaid interest thereon to the Special Mandatory Redemption Date. The
Company shall calculate the amount of such accretion in accordance with good
financial practice over the period from the Issue Date to November 15, 2009.
Upon the closing of the Transaction on or before the Special Redemption Date,
the foregoing provisions of this Section 3.08(b)(i) shall be null and void.

Section 3.09. Offer to Purchase by Application of Excess Proceeds.

     In the event that, pursuant to Section 4.10 hereof, the Company shall be
required to commence an offer to all Holders to purchase Notes (an "Asset Sale
Offer"), it shall follow the procedures specified below.

     The Asset Sale Offer shall remain open for a period of 20 Business Days
following its commencement and no longer, except to the extent that a longer
period is required by applicable law (the "Offer Period").  No later than five
Business Days after the termination of the Offer Period (the "Purchase Date"),
the Company shall purchase the principal amount of Notes required to be
purchased pursuant to Section 4.10 hereof (the "Offer Amount") or, if less than
the Offer Amount has been tendered, all Notes validly tendered in response to
the Asset Sale Offer.  Payment for any Notes so purchased shall be made in the
same manner as interest payments are made.

     If the Purchase Date is on or after an interest record date and on or
before the related interest payment date, any accrued and unpaid interest and
Liquidated Damages, if any, shall be paid to the Person in whose name a Note is
registered at the close of business on such record date, and no additional
interest or Liquidated Damages, if any, shall be payable to Holders who tender
Notes pursuant to the Asset Sale Offer.

     Upon the commencement of an Asset Sale Offer, the Company shall send, by
first class mail, a notice to each of the Holders, with a copy to the Trustee.
The notice shall contain all instructions and materials necessary to enable such
Holders to tender Notes pursuant to the Asset Sale Offer.  The Asset Sale Offer
shall be made to all Holders.  The notice, which shall govern the terms of the
Asset Sale Offer, shall state:

                                      -37-
<PAGE>

     (a) that the Asset Sale Offer is being made pursuant to this Section 3.09
and Section 4.10 hereof and the length of time the Asset Sale Offer shall remain
open;

     (b) the Offer Amount, the purchase price and the Purchase Date;

     (c) that any Note not tendered or accepted for payment shall continue to
accrue interest and Liquidated Damages, if any;

     (d) that, unless the Company defaults in making such payment, any Note
accepted for payment pursuant to the Asset Sale Offer shall cease to accrue
interest and Liquidated Damages, if any after the Purchase Date;

     (e) that Holders electing to have a Note purchased pursuant to an Asset
Sale Offer may only elect to have all of such Note purchased and may not elect
to have only a portion of such Note purchased;

     (f) that Holders electing to have a Note purchased pursuant to any Asset
Sale Offer shall be required to surrender the Note, with the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Note completed, to
the Company or a Paying Agent at the address specified in the notice at least
three days before the Purchase Date;

     (g) that Holders shall be entitled to withdraw their election if the
Company or the Paying Agent, as the case may be, receives, not later than the
expiration of the Offer Period, a telegram, telex, facsimile transmission or
letter setting forth the name of the Holder, the principal amount of the Note
the Holder delivered for purchase and a statement that such Holder is
withdrawing his election to have such Note purchased;

     (h) that, if the aggregate principal amount of Notes surrendered by Holders
exceeds the Offer Amount, the Trustee shall select the Notes to be purchased on
a pro rata basis (with such adjustments as may be deemed appropriate by the
Trustee so that only Notes in denominations of $1,000, or integral multiples
thereof, shall be purchased); and

     (i) that Holders whose Notes were purchased only in part shall be issued
new Notes equal in principal amount to the unpurchased portion of the Notes
surrendered (or transferred by book-entry transfer).

     If any of the Notes subject to an Asset Sale Offer is in the form of a
Global Note, then the Company shall modify such notice to the extent necessary
to accord with the procedures of the Depository applicable to repurchases.

     On or before the Purchase Date, the Company shall, to the extent lawful,
accept for payment, on a pro rata basis to the extent necessary, the Offer
Amount of Notes or portions thereof tendered pursuant to the Asset Sale Offer,
or if less than the Offer Amount has been tendered, all Notes tendered, and
shall deliver to the Trustee an Officers' Certificate stating that such Notes or
portions thereof were accepted for payment by the Company in accordance with the
terms of this Section

                                      -38-
<PAGE>

3.09. The Company or the Paying Agent, as the case may be, shall promptly (but
in any case not later than five days after the Purchase Date) mail or deliver to
each tendering Holder an amount equal to the purchase price of the Notes
tendered by such Holder and accepted by the Company for purchase, and the
Company shall promptly issue a new Note, and the Trustee shall authenticate and
mail or deliver such new Note to such Holder, in a principal amount equal to any
unpurchased portion of the Note surrendered. Any Note not so accepted shall be
promptly mailed or delivered by the Company to the Holder thereof. The Company
shall publicly announce the results of the Asset Sale Offer on the Purchase
Date.

     Other than as specifically provided in this Section 3.09, any purchase
pursuant to this Section 3.09 shall be made pursuant to the provisions of
Section 3.01 through Section 3.06 hereof.

                                   ARTICLE 4
                                   COVENANTS

Section 4.01. Payment of Notes.

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

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

Section 4.02. Maintenance of Office or Agency.

     The Company shall maintain an office or agency (which may be an office of
the Trustee or an affiliate of the Trustee, Registrar or co-registrar) where
Notes may be presented or surrendered for payment, where Notes may be
surrendered for registration of transfer or for exchange and where notices and
demands to or upon the Company in respect of the Notes and this Indenture may be
served.  The Company shall give prompt written notice to the Trustee of the
location, and any change in the location, of such office or agency.  If at any
time the Company shall fail to maintain any such required office or agency or
shall fail to furnish the Trustee with the address thereof, such presentations,
surrenders, notices and demands may be made or served at the Corporate Trust
Office of the Trustee.

     The Company may also from time to time designate one or more other offices
or agencies where the Notes may be presented or surrendered for any or all such
purposes and may from time

                                      -39-
<PAGE>

to time rescind such designations. Further, if at any time there shall be no
such office or agency in the City of New York where the Notes may be presented
or surrendered for payment, the Company shall forthwith designate and maintain
such an office or agency in the City of New York, in order that the Notes shall
at all times be payable in the City of New York. The Company shall give prompt
written notice to the Trustee of any such designation or rescission and of any
change in the location of any such other office or agency.

     The Company hereby designates the Corporate Trust Office of the Trustee as
one such office or agency of the Company in accordance with Section 2.03.

Section 4.03. Reports.

     (a) Whether or not the Company is required to do so by the rules and
regulations of the SEC, the Company will file with the SEC (unless the SEC will
not accept such a filing) and, within 15 days of filing, or attempting to file,
the same with the SEC, furnish to the holders of the Notes (i) all quarterly and
annual financial and other information with respect to the Company and its
Subsidiaries that would be required to be contained in a filing with the SEC on
Forms 10-Q and 10-K if the Company were required to file such forms, including a
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and, with respect to the annual information only, a report thereon
by the Company's certified independent accountants, and (ii) all current reports
that would be required to be filed with the SEC on Form 8-K if the Company were
required to file such reports.  The Company shall at all times comply with TIA
(S) 314(a).

     (b) In the case of any Notes that are originally issued as Transfer
Restricted Securities, the Company and the Guarantors shall furnish to the
holders of the Notes, prospective purchasers of the Notes and securities
analysts, upon their request, the information, if any, required to be delivered
pursuant to Rule 144A(d)(4) under the Securities Act.

Section 4.04. Compliance Certificate.

     (a) The Company shall deliver to the Trustee, within 90 days after the end
of each fiscal year, an Officers' Certificate stating that a review of the
activities of the Company and its Restricted Subsidiaries during the preceding
fiscal year has been made under the supervision of the signing Officers with a
view to determining whether the Company has kept, observed, performed and
fulfilled its obligations under this Indenture, and further stating, as to each
such Officer signing such certificate, that to the best of his or her knowledge
the Company has kept, observed, performed and fulfilled each and every covenant
contained in this Indenture and is not in default in the performance or
observance of any of the terms, provisions and conditions of this Indenture (or,
if a Default or Event of Default shall have occurred, describing all such
Defaults or Events of Default of which he or she may have knowledge and what
action the Company is taking or proposes to take with respect thereto) and that
to the best of his or her knowledge no event has occurred and remains in
existence by reason of which payments on account of the principal of or
interest, if any, on the Notes is prohibited or if such event has occurred, a
description of the event and what action the Company is taking or proposes to
take with respect thereto.

                                      -40-
<PAGE>

     (b) So long as not contrary to the then current recommendations of the
American Institute of Certified Public Accountants, the year-end financial
statements delivered pursuant to Section 4.03(a) above shall be accompanied by a
written statement of the Company's independent public accountants (who shall be
a firm of established national reputation) that in making the examination
necessary for certification of such financial statements, nothing has come to
their attention that would lead them to believe that the Company has violated
any provisions of Article 4 or Article 5 hereof or, if any such violation has
occurred, specifying the nature and period of existence thereof, it being
understood that such accountants shall not be liable directly or indirectly to
any Person for any failure to obtain knowledge of any such violation.

     (c) The Company shall, so long as any of the Notes are outstanding, deliver
to the Trustee, forthwith upon any Officer becoming aware of any Default or
Event of Default, an Officers' Certificate specifying such Default or Event of
Default and what action the Company is taking or proposes to take with respect
thereto.

Section 4.05. Taxes.

     The Company shall pay, and shall cause each of its Subsidiaries to pay,
prior to delinquency, all material taxes, assessments, and governmental levies
except such as are contested in good faith and by appropriate proceedings or
where the failure to effect such payment is not adverse in any material respect
to the Holders of the Notes.

Section 4.06. Stay, Extension and Usury Laws.

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

Section 4.07. Restricted Payments.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, (i) declare or pay any dividend or make
any other payment or distribution on account of the Company's or any of its
Restricted Subsidiaries' Equity Interests (including, without limitation, any
such payment in connection with any merger or consolidation involving the
Company) or to the direct or indirect holders of the Company's Equity Interests
in their capacity as such (other than dividends or distributions payable in
Equity Interests (other than Disqualified Stock) of the Company); (ii) purchase,
redeem or otherwise acquire or retire for value (including without limitation,
in connection with any merger or consolidation involving the Company) any Equity
Interests of the Company (other than any such Equity Interests owned by the
Company or any Restricted Subsidiary of the Company); (iii) make any payment on
or with respect to, or purchase,

                                      -41-
<PAGE>

redeem, defease or otherwise acquire or retire for value, any Indebtedness that
is subordinated to the Notes, except a payment of interest or principal at
Stated Maturity (or within one year thereof); or (iv) make any Restricted
Investment (all such payments and other actions set forth in clauses (i) through
(iv) above being collectively referred to as "Restricted Payments"), unless, at
the time of and after giving effect to such Restricted Payment:

          (a) no Default or Event of Default shall have occurred and be
     continuing or would occur as a consequence thereof;

          (b) the Company would, at the time of such Restricted Payment and
     after giving pro forma effect thereto as if such Restricted Payment had
     been made at the beginning of the applicable four-quarter period, have been
     permitted to incur at least $1.00 of additional Indebtedness pursuant to
     the Consolidated Interest Coverage Ratio test set forth in Section 4.09
     hereof; and

          (c) such Restricted Payment, together with the aggregate amount of all
     other Restricted Payments made by the Company and its Restricted
     Subsidiaries after the Issue Date (the amount expended for such purposes,
     if other than cash, being the fair market value on the date of transfer or
     issue), is less than the sum of the following amounts, without duplication:
     (A) 50% of the Consolidated Net Income of the Company for the period (taken
     as one accounting period) from January 1, 1998 to the end of the Company's
     most recently ended fiscal quarter for which internal financial statements
     are available at the time of such Restricted Payment (or, if such
     Consolidated Net Income for such period is a deficit, less 100% of such
     deficit), plus (B) 100% of the aggregate net cash proceeds received by the
     Company from the issue or sale since the Issue Date of Equity Interests of
     the Company (other than Disqualified Stock) or of Disqualified Stock or
     debt securities of the Company that have been converted into such Equity
     Interests (other than any such Equity Interests, Disqualified Stock or
     convertible debt securities sold to a Restricted Subsidiary of the Company
     and other than Disqualified Stock or convertible debt securities that have
     been converted into Disqualified Stock), plus (C) to the extent that any
     Restricted Investment that was made after the Issue Date is or was sold for
     cash or otherwise liquidated or repaid for cash, the cash return of capital
     with respect to such Restricted Investment (less the cost of disposition,
     if any), plus (D) in the event that any Unrestricted Subsidiary is
     redesignated as a Restricted Subsidiary, the lesser of (1) an amount equal
     to the fair value of the Company's Investments in such Restricted
     Subsidiary and (2) the amount of Restricted Investments previously made by
     the Company and its Restricted Subsidiaries in such Unrestricted
     Subsidiary, plus (E) $10.0 million.

     The foregoing provisions will not prohibit any of the following:  (a) the
payment of any dividend within 60 days after the date of declaration thereof, if
at said date of declaration such payment would have complied with the provisions
of this Indenture; (b) the redemption, repurchase, retirement, defeasance or
other acquisition of any subordinated Indebtedness or Equity Interests of the
Company in exchange for, or out of the net cash proceeds of the substantially
concurrent sale (other than to a Subsidiary of the Company) of, other Equity
Interests of the Company (other than any Disqualified Stock), provided that the
amount of any such net cash proceeds that are utilized for

                                      -42-
<PAGE>

any such redemption, repurchase, retirement, defeasance or other acquisition
shall be excluded from clause (iii)(B) of the preceding paragraph; (c) the
defeasance, redemption, repurchase, retirement or other acquisition of
subordinated Indebtedness with the net cash proceeds from an incurrence of, or
in exchange for, Permitted Refinancing Indebtedness; (d) the payment of any
dividend or distribution by a Restricted Subsidiary of the Company to the
holders of its common Equity Interests on a pro rata basis; (e) so long as no
Default or Event of Default shall have occurred and be continuing, the
repurchase, redemption or other acquisition or retirement for value of any
Equity Interests of the Company held by any employee of the Company or any of
its Restricted Subsidiaries, provided that the aggregate price paid for all such
repurchased, redeemed, acquired or retired Equity Interests shall not exceed
$1.0 million in any calendar year; and (f) the acquisition of Equity Interests
of the Company in connection with the exercise of stock options or stock
appreciation rights by way of cashless exercise or in connection with the
satisfaction of withholding tax obligations. In determining the aggregate amount
of Restricted Payments made subsequent to the Issue Date in accordance with
clause (c) of the immediately preceding paragraph, amounts expended pursuant to
clauses (b), (c), (d) and (f) of this paragraph shall be excluded from the
calculation and amounts expended pursuant to clauses (a) and (e) of this
paragraph shall be included in the calculation.

     The Board of Directors may designate any Restricted Subsidiary to be an
Unrestricted Subsidiary if such designation would not cause a Default.  For
purposes of making such determination, all outstanding Investments by the
Company and its Restricted Subsidiaries (except to the extent repaid in cash) in
the Subsidiary so designated shall be deemed to be Restricted Payments at the
time of such designation. All such outstanding Investments will be deemed to
constitute Investments in an amount equal to the greater of (a) the net book
value of such Investments at the time of such designation and (b) the fair
market value of such Investments at the time of such designation. Such
designation shall only be permitted if such Restricted Payment would be
permitted at such time and if such Restricted Subsidiary otherwise meets the
definition of an Unrestricted Subsidiary.

     The Board of Directors of the Company may at any time designate any
Unrestricted Subsidiary to be a Restricted Subsidiary, provided that such
designation shall be deemed to be an incurrence of Indebtedness by a Restricted
Subsidiary of the Company of any outstanding Indebtedness of such Unrestricted
Subsidiary and such designation shall only be permitted if (a) such Indebtedness
is permitted under Section 4.09 hereof, calculated on a pro forma basis as if
such designation had occurred at the beginning of the four-quarter reference
period, and (b) no Default or Event of Default would be in existence following
such designation.

     Any designation of a Subsidiary as an Unrestricted Subsidiary shall be
evidenced to the Trustee by filing with the Trustee a certified copy of a
resolution of the Board of Directors giving effect to such designation and an
Officers' Certificate certifying that such designation complied with the terms
of the definition of Unrestricted Subsidiary set forth in this Indenture and
with this Section 4.07.

     The amount of all Restricted Payments (other than cash) shall be the fair
market value on the date of the Restricted Payment of the asset(s) or securities
proposed to be transferred or issued by the Company or such Restricted
Subsidiary, as the case may be, pursuant to the Restricted Payment.

                                      -43-
<PAGE>

The fair market value of any non-cash Restricted Payment shall be determined in
the manner contemplated by the definition of the term "fair market value," and
the results of such determination shall be evidenced by an Officers' Certificate
delivered to the Trustee. Not later than the date of making any Restricted
Payment, the Company shall deliver to the Trustee an Officers' Certificate
stating that such Restricted Payment is permitted and setting forth the basis
upon which the calculations required by this Section 4.07 were computed;
provided, however, with respect to any planned purchase or redemption by the
Company of its Equity Interests, the Company may, in advance of any such
purchase or redemption, deliver to the Trustee a single Officers' Certificate
that otherwise complies with requirements set forth above stating (i) the
maximum aggregate amount of Equity Interests to be purchased or redeemed and
(ii) the period over which such purchases or redemptions will occur.

Section 4.08. Dividend and Other Payment Restrictions Affecting Subsidiaries.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create or otherwise cause or suffer to
exist or become effective any encumbrance or restriction on the ability of any
Restricted Subsidiary to (a)(i) pay dividends or make any other distributions to
the Company or any of its Restricted Subsidiaries on its Capital Stock or with
respect to any other interest or participation in, or measured by, its profits,
or (ii) pay any Indebtedness owed to the Company or any of its Restricted
Subsidiaries, (b) make loans or advances to the Company or any of its Restricted
Subsidiaries or (c) transfer any of its properties or assets to the Company or
any of its Restricted Subsidiaries, except for such encumbrances or restrictions
existing under or by reason of (1) the Credit Facility or Existing Indebtedness,
each as in effect on the Issue Date, (2) this Indenture, the Notes and the
Subsidiary Guarantees, if any, (3) applicable law, (4) any instrument governing
Indebtedness or Capital Stock of a Person acquired by the Company or any of its
Restricted Subsidiaries as in effect at the time of such acquisition (except to
the extent such Indebtedness was incurred in connection with or in contemplation
of such acquisition), which encumbrance or restriction is not applicable to any
Person, or the properties or assets of any Person, other than the Person, or the
property or assets of the Person, so acquired, provided that, in the case of
Indebtedness, such Indebtedness was permitted by the terms of this Indenture to
be incurred, (5) by reason of customary non-assignment provisions in leases
entered into in the ordinary course of business and consistent with past
practices, (6) purchase money obligations for property acquired in the ordinary
course of business that impose restrictions of the nature described in clause
(c) above on the property so acquired, (7) customary provisions in bona fide
contracts for the sale of property or assets or (8) Permitted Refinancing
Indebtedness with respect to any Indebtedness referred to in clauses (1) and (2)
above, provided that the restrictions contained in the agreements governing such
Permitted Refinancing Indebtedness are not materially more restrictive, taken as
a whole, than those contained in the agreements governing the Indebtedness being
refinanced.

Section 4.09. Incurrence of Indebtedness and Issuance of Disqualified Stock.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, issue, assume, guarantee
or otherwise become directly or indirectly liable, contingently or otherwise,
with respect to (collectively, "incur" or an "incurrence") any Indebtedness
other than Permitted Indebtedness and that the Company will not issue any

                                      -44-
<PAGE>

Disqualified Stock and will not permit any of its Restricted Subsidiaries to
issue any shares of Disqualified  Stock; provided, however, that the Company or
a Guarantor may incur Indebtedness, and the Company may issue Disqualified
Stock, if the Consolidated Interest Coverage Ratio for the Company's most
recently ended four full fiscal quarters for which internal financial statements
are available immediately preceding the date on which such additional
Indebtedness is incurred or such Disqualified Stock is issued would have been at
least 2.0 to 1, determined on a pro forma basis (including a pro forma
application of the net proceeds therefrom), as if the additional Indebtedness or
Disqualified Stock had been issued or incurred at the beginning of such four-
quarter period.

Section 4.10. Asset Sales.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, consummate an Asset Sale unless (a) the Company or such
Restricted Subsidiary, as the case may be, receives consideration at the time of
such Asset Sale at least equal to the fair market value (as determined in
accordance with the definition of such term, the results of which determination
shall be set forth in an Officers' Certificate delivered to the Trustee) of the
assets or Equity Interests issued or sold or otherwise disposed of and (b) at
least 75% of the consideration therefor received by the Company or such
Restricted Subsidiary is in the form of cash or Cash Equivalents; provided,
however, that the amount of (i) any liabilities (as shown on the Company's or
such Restricted Subsidiary's most recent balance sheet) of the Company or such
Restricted Subsidiary (other than contingent liabilities and liabilities that
are by their terms subordinated to the Notes or any guarantee thereof) that are
assumed by the transferee of any such assets pursuant to a customary novation
agreement that releases the Company or such Restricted Subsidiary from further
liability and (ii) any securities, notes or other obligations received by the
Company or such Restricted Subsidiary from such transferee that are immediately
converted by the Company or such Restricted Subsidiary into cash (to the extent
of the cash received) shall be deemed to be cash for purposes of this Section
4.10.

     Within 365 days after the receipt of any Net Proceeds from an Asset Sale,
the Company or any such Restricted Subsidiary may apply such Net Proceeds to (a)
permanently repay the principal of any secured Indebtedness (to the extent of
the fair value of the assets securing such Indebtedness, as determined by the
Board of Directors) or (b) to acquire (including by way of a purchase of assets
or stock, merger, consolidation or otherwise) assets used in the Principal
Business.  (Any such Net Proceeds that are applied to the acquisition of assets
used in the Principal Business pursuant to any binding agreement shall be deemed
to have been applied for such purpose within such 365-day period so long as they
are so applied within two years after the date of receipt of such Net Proceeds.)
Pending the final application of any such Net Proceeds, the Company or any such
Restricted Subsidiary may temporarily reduce outstanding revolving credit
borrowings, or otherwise invest such Net Proceeds in any manner that is not
prohibited by this Indenture. Any Net Proceeds from Asset Sales that are not
applied or invested as provided in the first sentence of this paragraph shall be
deemed to constitute "Excess Proceeds."  Within 30 days of each date on which
the aggregate amount of Excess Proceeds exceeds $10.0 million, the Company shall
commence an Asset Sale Offer pursuant to Section 3.09 hereof to purchase the
maximum principal amount of Notes that may be purchased out of Excess Proceeds
at an offer price in cash in an amount equal to 100% of the principal amount
thereof, plus accrued and unpaid interest and Liquidated Damages, if any,
thereon, to the date of purchase, in accordance with the procedures set forth in
Section 3.09 hereof; provided,

                                      -45-
<PAGE>

however, that, if the Company is required to apply such Excess Proceeds to
repurchase, or to offer to repurchase, any Pari Passu Indebtedness, the Company
shall only be required to offer to repurchase the maximum principal amount of
Notes that may be purchased out of the amount of such Excess Proceeds multiplied
by a fraction, the numerator of which is the aggregate principal amount of Notes
outstanding and the denominator of which is the aggregate principal amount of
Notes outstanding plus the aggregate principal amount of Pari Passu Indebtedness
outstanding. To the extent that the aggregate principal amount of Notes tendered
pursuant to an Asset Sale Offer is less than the amount that the Company is
required to repurchase, the Company may use any remaining Excess Proceeds for
general corporate purposes. If the aggregate principal amount of Notes
surrendered by holders thereof exceeds the amount that the Company is required
to repurchase, the Trustee shall select the Notes to be purchased on a pro rata
basis (with such adjustments as may be deemed appropriate by the Trustee so that
only Notes in denominations of $1,000, or integral multiples thereof, shall be
purchased). Upon completion of such offer to purchase, the amount of Excess
Proceeds shall be reset at zero.

Section 4.11. Transactions with Affiliates.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, make any payment to, or sell, lease, transfer or otherwise
dispose of any of its properties or assets to, or purchase any property or
assets from, or enter into or make or amend any transaction, contract,
agreement, understanding, loan, advance or guarantee with, or for the benefit
of, any Affiliate (each of the foregoing, an "Affiliate Transaction"), unless
(a) such Affiliate Transaction is on terms that are no less favorable to the
Company or the relevant Restricted Subsidiary than those that would have been
obtained in a comparable transaction by the Company or such Restricted
Subsidiary with an unrelated Person or, if there is no such comparable
transaction, on terms that are fair and reasonable to the Company or such
Restricted Subsidiary, and (b) the Company delivers to the Trustee (i) with
respect to any Affiliate Transaction or series of related Affiliate Transactions
involving aggregate consideration in excess of $5.0 million, a resolution of the
Board of Directors set forth in an Officers' Certificate certifying that such
Affiliate Transaction complies with clause (a) above and that such Affiliate
Transaction has been approved by a majority of the disinterested members of the
Board of Directors and (ii) with respect to any Affiliate Transaction or series
of related Affiliate Transactions involving aggregate consideration in excess of
$10.0 million, an opinion as to the fairness to the Company or the relevant
Subsidiary of such Affiliate Transaction from a financial point of view issued
by an accounting, appraisal or investment banking firm that is, in the judgment
of the Board of Directors, qualified to render such opinion and is independent
with respect to the Company; provided, however, that the following shall be
deemed not to be Affiliate Transactions:  (A) any employment agreement or other
employee compensation plan or arrangement entered into by the Company or any of
its Restricted Subsidiaries in the ordinary course of business of the Company or
such Restricted Subsidiary; (B) transactions between or among the Company and
its Restricted Subsidiaries; (C) Permitted Investments and Restricted Payments
that are permitted by the provisions of this Indenture; (D) loans or advances to
officers, directors and employees of the Company or any Restricted Subsidiary
made in the ordinary course of business and consistent with past practices of
the Company and its Restricted Subsidiaries in an aggregate amount not to exceed
$500,000 outstanding at any one time; (E) indemnities of officers, directors and
employees of the Company or any Restricted Subsidiary permitted by bylaw or
statutory provisions;

                                      -46-
<PAGE>

and (F) the payment of reasonable and customary regular fees to directors of the
Company or any of its Restricted Subsidiaries.

Section 4.12. Liens.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, directly or indirectly, create, incur, assume or suffer to
exist any Lien on any asset now owned or hereafter acquired, or any income or
profits therefrom, or assign or convey any right to receive income therefrom,
except Permitted Liens, to secure (a) any Indebtedness of the Company or such
Restricted Subsidiary (if it is not also a Guarantor), unless prior to, or
contemporaneously therewith, the Notes are equally and ratably secured, or (b)
any Indebtedness of any Guarantor, unless prior to, or contemporaneously
therewith, the Subsidiary Guarantees are equally and ratably secured; provided,
however, that if such Indebtedness is expressly subordinated to the Notes or the
Subsidiary Guarantees, the Lien securing such Indebtedness will be subordinated
and junior to the Lien securing the Notes or the Subsidiary Guarantees, as the
case may be, with the same relative priority as such Indebtedness has with
respect to the Notes or the Subsidiary Guarantees.

Section 4.13. Future Subsidiary Guarantees.

     The Company shall cause each Restricted Subsidiary that (i) incurs
Indebtedness (other than Permitted Indebtedness and Purchase Money Indebtedness)
following the Issue Date or (ii) has Indebtedness (other than Permitted
Indebtedness and Purchase Money Indebtedness) or Disqualified Stock outstanding
on the date on which such Restricted Subsidiary becomes a Restricted Subsidiary,
to execute a Subsidiary Guarantee at the time such Restricted Subsidiary incurs
such Indebtedness or becomes a Restricted Subsidiary and deliver an Opinion of
Counsel and an Officers' Certificate in accordance with the terms of Section
10.02 of this Indenture.

Section 4.14. Corporate Existence.

     Subject to Article 5 hereof, the Company shall do or cause to be done all
things necessary to preserve and keep in full force and effect its corporate
existence, and, subject to Article 10 hereof, the corporate, partnership or
other existence of each of its Restricted Subsidiaries, in accordance with the
respective organizational documents (as the same may be amended from time to
time) of the Company or any such Restricted Subsidiary; provided, however, that
the Company shall not be required to preserve the existence of any of its
Restricted Subsidiaries, if the Board of Directors shall determine that the
preservation thereof is no longer desirable in the conduct of the business of
the Company and its Restricted Subsidiaries, taken as a whole.

Section 4.15. Offer to Repurchase Upon Change of Control.

     (a) Upon the occurrence of a Change of Control, the Company shall make an
offer (a "Change of Control Offer") to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of each Holder's Notes at an offer price
in cash equal to 101% of the aggregate principal amount thereof, plus accrued
and unpaid interest and Liquidated Damages, if any, thereon to the date of
repurchase (the "Change of Control Payment").  Within 30 days following a Change
of Control,

                                      -47-
<PAGE>

the Company shall mail a notice to each Holder and the Trustee stating: (1) that
the Change of Control Offer is being made pursuant to this Section 4.15 and that
all Notes validly tendered and not withdrawn will be accepted for payment; (2)
the purchase price and the purchase date, which shall be no earlier than 30 days
but no later than 60 days from the date such notice is mailed (the "Change of
Control Payment Date"); (3) that any Note not tendered will continue to accrue
interest and Liquidated Damages, if any; (4) that, unless the Company defaults
in the payment of the Change of Control Payment, all Notes accepted for payment
pursuant to the Change of Control Offer shall cease to accrue interest and
Liquidated Damages, if any, after the Change of Control Payment Date; (5) that
Holders electing to have any Notes purchased pursuant to a Change of Control
Offer will be required to surrender the Notes, properly endorsed for transfer,
together with the form entitled "Option of Holder to Elect Purchase" on the
reverse of the Notes completed and such customary documents as the Company may
reasonably request, to the Paying Agent at the address specified in the notice
prior to the close of business on the third Business Day preceding the Change of
Control Payment Date; (6) that Holders will be entitled to withdraw their
election if the Paying Agent receives, not later than the close of business on
the second Business Day preceding the Change of Control Payment Date, a
telegram, telex, facsimile transmission or letter setting forth the name of the
Holder, the principal amount of Notes delivered for purchase, and a statement
that such Holder is withdrawing his election to have the Notes purchased; and
(7) that Holders whose Notes are being purchased only in part will be issued new
Notes equal in principal amount to the unpurchased portion of the Notes
surrendered, which unpurchased portion must be equal to $1,000 in principal
amount or an integral multiple thereof. If any of the Notes subject to a Change
of Control Offer is in the form of a Global Note, then the Company shall modify
such notice to the extent necessary to accord with the procedures of the
Depository applicable to repurchases. Further, the Company shall comply with the
requirements of Rule 14e-1 under the Exchange Act and any other securities laws
and regulations thereunder to the extent such laws and regulations are
applicable in connection with the repurchase of Notes as a result of a Change of
Control.

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

     (c) The Change of Control provisions described above shall be applicable
whether or nor any other provisions of this Indenture are applicable.

                                      -48-
<PAGE>

     (d) The Company shall not be required to make a Change of Control Offer
following a Change of Control if a third party makes the Change of Control
Offer in the manner, at the time and otherwise in compliance with the
requirements set forth in this Indenture applicable to a Change of Control Offer
made by the Company and purchases all Notes validly tendered and not withdrawn
under such Change of Control Offer.

Section 4.16. Issuances and Sales of Capital Stock of Wholly Owned Restricted
              Subsidiaries.

     The Company (i) shall not, and shall not permit any Wholly Owned Restricted
Subsidiary of the Company to, transfer, convey, sell, or otherwise dispose of
any Capital Stock of any Wholly Owned Restricted Subsidiary of the Company to
any Person (other than the Company or a Wholly Owned Restricted Subsidiary of
the Company), unless (a) such transfer, conveyance, sale, or other disposition
is of all the Capital Stock of such Wholly Owned Restricted Subsidiary and (b)
the Net Proceeds from such transfer, conveyance, sale, or other disposition are
applied in accordance with Section 4.10 hereof, and (ii) shall not permit any
Wholly Owned Restricted Subsidiary of the Company to issue any of its Equity
Interests to any Person other than to the Company or a Wholly Owned Restricted
Subsidiary of the Company; except, in the case of both clauses (i) and (ii)
above, with respect to dispositions or issuances by a Wholly Owned Restricted
Subsidiary of the Company as contemplated in clauses (a) and (b) of the
definition of "Wholly Owned Restricted Subsidiary."

 Section 4.17. Sale-and-leaseback Transactions.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, enter into any sale-and-leaseback transaction; provided,
however, that the Company or any Restricted Subsidiary, as applicable, may enter
into a sale-and-leaseback transaction if (i) the Company or such Restricted
Subsidiary could have (a) incurred Indebtedness in an amount equal to the
Attributable Indebtedness relating to such sale-and-leaseback transaction
pursuant to the Consolidated Interest Coverage Ratio test set forth in Section
4.09 hereof and (b) incurred a Lien to secure such Indebtedness pursuant to
Section 4.12 hereof, (ii) the gross cash proceeds of such sale-and-leaseback
transaction are at least equal to the fair market value (as determined in
accordance with the definition of such term, the results of which determination
shall be set forth in an Officers' Certificate delivered to the Trustee) of the
property that is the subject of such sale-and-leaseback transaction and (iii)
the transfer of assets in such sale-and-leaseback transaction is permitted by,
and the Company applies the proceeds of such transaction in compliance with,
Section 4.10 hereof.

Section 4.18. No Inducements.

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

                                      -49-
<PAGE>

Section 4.19. Line of Business.

     The Company shall not, and shall not permit any of its Restricted
Subsidiaries to, engage in any business or activity other than the Principal
Business.

                                   ARTICLE 5
                                  SUCCESSORS

Section 5.01. Merger, Consolidation, or Sale of Assets.

     The Company shall not consolidate or merge with or into (whether or not the
Company is the surviving corporation), or sell, assign, transfer, lease, convey
or otherwise dispose of all or substantially all of its properties or assets in
one or more related transactions, to another Person unless (a) the Company is
the surviving corporation or the Person formed by or surviving any such
consolidation or merger (if other than the Company) or to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made is a corporation organized or existing under the laws of the United States,
any state thereof or the District of Columbia, (b) the Person formed by or
surviving any such consolidation or merger (if other than the Company) or the
Person to which such sale, assignment, transfer, lease, conveyance or other
disposition shall have been made assumes all the obligations of the Company
under the Notes and this Indenture pursuant to a supplemental indenture in a
form reasonably satisfactory to the Trustee, (c) immediately after such
transaction no Default or Event of Default exists and (d) except in the case of
a merger of the Company with or into a Wholly Owned Restricted Subsidiary of the
Company, the Company or the Person formed by or surviving any such consolidation
or merger (if other than the Company), or the Person to which such sale,
assignment, transfer, lease, conveyance or other disposition shall have been
made (A) will have Consolidated Net Worth immediately after the transaction
equal to or greater than the Consolidated Net Worth of the Company immediately
preceding the transaction and (B) will, at the time of such transaction and
after giving pro forma effect thereto as if such transaction had occurred at the
beginning of the applicable four-quarter period, be permitted to incur at least
$1.00 of additional Indebtedness pursuant to the Consolidated Interest Coverage
Ratio test set forth in Section 4.09 hereof.

     In connection with any consolidation, merger or disposition contemplated by
this provision, the Company shall deliver, or cause to be delivered, to the
Trustee, in form and substance reasonably satisfactory to the Trustee, (i) an
Officers' Certificate stating that such consolidation, merger or disposition and
any supplemental indenture in respect thereto comply with this provision and
that all conditions precedent in the Indenture provided for relating to such
transaction or transactions have been complied with and (ii) an Opinion of
Counsel stating that the requirements of Section 5.01(a) and (b) have been
satisfied.

Section 5.02. Successor Corporation Substituted.

     Upon any consolidation or merger, or any sale, assignment, transfer, lease,
conveyance or other disposition of all or substantially all of the properties or
assets of the Company in accordance with Section 5.01 hereof, the successor
corporation formed by such consolidation or into or with

                                      -50-
<PAGE>

which the Company is merged or to which such sale, assignment, transfer, lease,
conveyance or other disposition is made shall succeed to, and be substituted for
(so that from and after the date of such consolidation, merger, sale,
assignment, transfer, lease, conveyance or other disposition, the provisions of
this Indenture referring to the "Company" shall refer instead to the successor
corporation and not to the Company), and may exercise every right and power of
the Company under this Indenture with the same effect as if such successor
corporation had been named as the Company herein; provided, however, that the
predecessor Company shall not be relieved from its obligations under this
Indenture or the Notes in the case of any such lease.

                                   ARTICLE 6
                             DEFAULTS AND REMEDIES

Section 6.01. Events of Default.

     An "Event of Default" occurs if:

          (a) the Company defaults in the payment when due of interest on, or
     Liquidated Damages, if any, with respect to, the Notes, and such default
     continues for a period of 30 days;

          (b) the Company defaults in the payment when due of principal of or
     premium, if any, on the Notes;

          (c) the Company fails to comply with any of the provisions of Section
     4.10, 4.15 or 5.01 hereof;

          (d) the Company fails to observe or perform any other covenant or
     other agreement in this Indenture, the Notes or the Escrow Agreement for 60
     days after notice to the Company by the Trustee or the Holders of at least
     25% in principal amount of the Notes then outstanding of such failure;

          (e) a default occurs under any mortgage, indenture or instrument under
     which there may be issued or by which there may be secured or evidenced any
     Indebtedness for money borrowed by the Company or any of its Restricted
     Subsidiaries (or the payment of which is guaranteed by the Company or any
     of its Restricted Subsidiaries), whether such Indebtedness or guarantee now
     exists, or is created after the Issue Date, which default (i) is caused by
     a failure to pay principal of or premium or interest on such Indebtedness
     prior to the expiration of any grace period provided in such Indebtedness
     (a "Payment Default") or (ii) results in the acceleration of such
     Indebtedness prior to its express maturity and, in each case, the principal
     amount of any such Indebtedness, together with the principal amount of any
     other such Indebtedness under which there has been a Payment Default or the
     maturity of which has been so accelerated, aggregates $5.0 million or more;
     and provided, further, that if such default is cured or waived or any such
     acceleration rescinded, or such Indebtedness is repaid, within a period of
     10 days from the continuation of such default beyond the applicable grace
     period or the occurrence of such acceleration, as the case may

                                      -51-
<PAGE>

     be, an Event of Default and any consequential acceleration of the Notes
     shall be automatically rescinded, so long as such rescission does not
     conflict with any judgment or decree;

          (f) a final judgment or final judgments for the payment of money are
     entered by a court or courts of competent jurisdiction against the Company
     or any of its Restricted Subsidiaries  and such judgment or judgments are
     not paid or discharged for a period (during which execution shall not be
     effectively stayed) of 60 days, provided that the aggregate of all such
     undischarged judgments exceeds $5.0 million (net of applicable insurance
     coverage which is acknowledged in writing by the insurer);

          (g) the failure of any Guarantor to perform any covenant set forth in
     its Subsidiary Guarantee or the repudiation by any Guarantor of its
     obligations under its Subsidiary Guarantee or the unenforceability of any
     Subsidiary Guarantee for any reason;

          (h) the failure of the Escrow Agreement to be in full force and effect
     (unless the Deposit is released by the escrow agent in accordance with the
     terms of the Escrow Agreement) or any contest by the Company or any of its
     Subsidiaries of the validity or enforceability of the Escrow Agreement;

          (i) the Company or any Guarantor pursuant to or within the meaning of
     Bankruptcy Law:

                (i)   commences a voluntary case,

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

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

                (iv)  makes a general assignment for the benefit of its
          creditors, or

                (v)   generally is not paying its debts as they become due; or

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

                (i)   is for relief against the Company or any Guarantor in an
          involuntary case,

                (ii)  appoints a Custodian of the Company or any Guarantor or
          for all or substantially all of the property of the Company or any
          Guarantor, or

                (iii) orders the liquidation of the Company or any Guarantor,

                                      -52-
<PAGE>

          and the order or decree remains unstayed and in effect for 60
          consecutive days.

Section 6.02. Acceleration.

     If any Event of Default occurs and is continuing, the Trustee or the
Holders of at least 25% in principal amount of the then outstanding Notes may
declare all the Notes to be due and payable immediately.  Upon any such
declaration, the Notes shall become due and payable immediately. Notwithstanding
the foregoing, if an Event of Default specified in clause (i) or (j) of Section
6.01 hereof occurs with respect to the Company or any Guarantor, all outstanding
Notes shall be due and payable immediately without further action or notice.
The Holders of a majority in principal amount of the then outstanding Notes by
written notice to the Trustee may on behalf of all of the Holders rescind an
acceleration and its consequences if the rescission would not conflict with any
judgment or decree and if all existing Events of Default (except nonpayment of
principal, interest, premium or Liquidated Damages, if any, that have become due
solely because of the acceleration) have been cured or waived.

     If an Event of Default occurs by reason of any willful action (or inaction)
taken (or not taken) by or on behalf of the Company with the intention of
avoiding payment of the premium that the Company would have had to pay if the
Company then had elected to redeem the Notes pursuant to Section 3.07 hereof,
then, upon acceleration of the Notes, an equivalent premium shall also become
and be immediately due and payable, to the extent permitted by law, anything in
this Indenture or in the Notes to the contrary notwithstanding.

Section 6.03. Other Remedies.

     If an Event of Default occurs and is continuing, the Trustee may pursue any
available remedy to collect the payment of principal of and premium, interest
and Liquidated Damages, if any, on the Notes or to enforce the performance of
any provision of the Notes or this Indenture.

     The Trustee may maintain a proceeding even if it does not possess any of
the Notes or does not produce any of them in the proceeding.  A delay or
omission by the Trustee or any Holder of a Note in exercising any right or
remedy accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default.  All remedies
are cumulative to the extent permitted by law.

Section 6.04. Waiver of Past Defaults.

     Holders of a majority in principal amount of the then outstanding Notes by
notice to the Trustee may on behalf of the Holders of all of the Notes waive any
existing Default or Event of Default and its consequences hereunder, except a
continuing Default or Event of Default in the payment of the principal of or
premium, interest or Liquidated Damages, if any, on the Notes (including in
connection with an offer to purchase).  Upon any such waiver, such Default shall
cease to exist, and any Event of Default arising therefrom shall be deemed to
have been cured for every purpose of this Indenture; but no such waiver shall
extend to any subsequent or other Default or impair any right consequent
thereon.

                                      -53-
<PAGE>

Section 6.05. Control by Majority.

     Holders of a majority in principal amount of the then outstanding Notes may
direct the time, method and place of conducting any proceeding for exercising
any remedy available to the Trustee or exercising any trust or power conferred
on it.  However, the Trustee may refuse to follow any direction that conflicts
with law or this Indenture or that the Trustee determines may be unduly
prejudicial to the rights of other Holders of Notes or that may involve the
Trustee in personal liability.

Section 6.06. Limitation on Suits.

     A Holder of a Note may pursue a remedy with respect to this Indenture or
the Notes only if:

          (a) the Holder of a Note gives to the Trustee written notice of a
     continuing Event of Default;

          (b) the Holders of at least 25% in principal amount of the then
     outstanding Notes make a written request to the Trustee to pursue the
     remedy;

          (c) such Holder of a Note or Holders of Notes offer and, if requested,
     provide to the Trustee indemnity satisfactory to the Trustee against any
     loss, liability or expense;

          (d) the Trustee does not comply with the request within 60 days after
     receipt of the request and the offer and, if requested, the provision of
     indemnity; and

          (e) during such 60-day period the Holders of a majority in principal
     amount of the then outstanding Notes do not give the Trustee a direction
     inconsistent with the request.

A Holder of a Note may not use this Indenture to prejudice the rights of another
Holder of a Note or to obtain a preference or priority over another Holder of a
Note.

Section 6.07. Rights of Holders of Notes to Receive Payment.

     Notwithstanding any other provision of this Indenture, the right of any
Holder of a Note to receive payment of principal of and premium, interest and
Liquidated Damages, if any, on the Note, on or after the respective due dates
expressed in the Note (including in connection with an offer to purchase), or to
bring suit for the enforcement of any such payment on or after such respective
dates, shall not be impaired or affected without the consent of such Holder.

Section 6.08. Collection Suit by Trustee.

     If an Event of Default specified in Section 6.01(a) or (b) occurs and is
continuing, the Trustee is authorized to recover judgment in its own name and as
trustee of an express trust against the Company for the whole amount of
principal of, premium, interest and Liquidated Damages, if any, remaining unpaid
on the Notes and interest on overdue principal and, to the extent lawful,
interest

                                      -54-
<PAGE>

and Liquidated Damages, if any, and such further amount as shall be sufficient
to cover the costs and expenses of collection, including the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel.

Section 6.09. Trustee May File Proofs of Claim.

     The Trustee is authorized to file such proofs of claim and other papers or
documents as may be necessary or advisable in order to have the claims of the
Trustee (including any claim for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel) and the
Holders of the Notes allowed in any judicial proceedings relative to the Company
(or any other obligor upon the Notes), its creditors or its property and shall
be entitled and empowered to collect, receive and distribute any money or other
property payable or deliverable on any such claims and any custodian in any such
judicial proceeding is hereby authorized by each Holder to make such payments to
the Trustee, and in the event that the Trustee shall consent to the making of
such payments directly to the Holders, to pay to the Trustee any amount due to
it for the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.07 hereof.  To the extent that the payment of any such compensation,
expenses, disbursements and advances of the Trustee, its agents and counsel, and
any other amounts due the Trustee under Section 7.07 hereof out of the estate in
any such proceeding, shall be denied for any reason, payment of the same shall
be secured by a Lien on, and shall be paid out of, any and all distributions,
dividends, money, securities and other properties that the Holders may be
entitled to receive in such proceeding whether in liquidation or under any plan
of reorganization or arrangement or otherwise.  Nothing herein contained shall
be deemed to authorize the Trustee to authorize or consent to or accept or adopt
on behalf of any Holder any plan of reorganization, arrangement, adjustment or
composition affecting the Notes or the rights of any Holder, or to authorize the
Trustee to vote in respect of the claim of any Holder in any such proceeding.

Section 6.10. Priorities.

     If the Trustee collects any money pursuant to this Article, it shall pay
out the money in the following order:

          First:  to the Trustee, its agents and attorneys for amounts due under
     Section 7.07 hereof, including payment of all compensation, expense and
     liabilities incurred, and all advances made, by the Trustee and the
     Trustee's costs and expenses of collection;

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

          Third:  to the Company or to such party as a court of competent
     jurisdiction shall direct.

                                      -55-
<PAGE>

     The Trustee may fix a record date and payment date for any payment to
Holders of Notes pursuant to this Section 6.10.

Section 6.11. Undertaking for Costs.

     In any suit for the enforcement of any right or remedy under this Indenture
or in any suit against the Trustee for any action taken or omitted by it as a
Trustee, a court in its discretion may require the filing by any party litigant
in the suit of an undertaking to pay the costs of the suit, and the court in its
discretion may assess reasonable costs, including reasonable attorneys' fees,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant.  This Section does
not apply to a suit by the Trustee, a suit by a Holder of a Note pursuant to
Section 6.07 hereof, or a suit by Holders of more than 10% in principal amount
of the then outstanding Notes.

                                   ARTICLE 7
                                    TRUSTEE

Section 7.01. Duties of Trustee.

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

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

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

         (ii)   in the absence of bad faith on its part, the Trustee may
     conclusively rely, as to the truth of the statements and the correctness of
     the opinions expressed therein, upon certificates or opinions furnished to
     the Trustee and conforming to the requirements of this Indenture.  However,
     the Trustee shall examine the certificates and opinions to determine
     whether or not they conform to the requirements of this Indenture.

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

         (i)    this paragraph does not limit the effect of paragraph (b) of
     this Section 7.01;

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

                                      -56-
<PAGE>

         (iii)  the Trustee shall not be liable with respect to any action it
     takes or omits to take in good faith in accordance with a direction
     received by it pursuant to Section 6.05 hereof.

     (d) Whether or not therein expressly so provided, every provision of this
Indenture that in any way relates to the Trustee is subject to paragraphs (a),
(b) and (c) of this Section 7.01.

     (e) No provision of this Indenture shall require the Trustee to expend or
risk its own funds or incur any liability.  The Trustee shall be under no
obligation to exercise any of its rights and powers under this Indenture at the
request of any Holders, unless such Holder shall have offered to the Trustee
security and indemnity satisfactory to it against any loss, liability or
expense.

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

Section 7.02. Rights of Trustee.

     (a) The Trustee may conclusively rely upon any document believed by it to
be genuine and to have been signed or presented by the proper Person.  The
Trustee need not investigate any fact or matter stated in the document.

     (b) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel or both.  The Trustee shall not
be liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel.  The Trustee may consult with
counsel and the written advice of such counsel or any Opinion of Counsel shall
be full and complete authorization and protection from liability in respect of
any action taken, suffered or omitted by it hereunder in good faith and in
reliance thereon.

     (c) The Trustee may act through its attorneys and agents and shall not be
responsible for the misconduct or negligence of any agent appointed with due
care.

     (d) The Trustee shall not be liable for any action it takes or omits to
take in good faith that it believes to be authorized or within the rights or
powers conferred upon it by this Indenture.

     (e) Unless otherwise specifically provided in this Indenture, any demand,
request, direction or notice from the Company shall be sufficient if signed by
an Officer of the Company.

     (f) The Trustee shall be under no obligation to exercise any of the rights
or powers vested in it by this Indenture at the request or direction of any of
the Holders unless such Holders shall have offered to the Trustee reasonable
security or indemnity against the costs, expenses and liabilities that might be
incurred by it in compliance with such request or direction.

     (g) The Trustee shall have no duty to inquire as to the performance of the
Company's covenants in Article 4 hereof.  In addition, the Trustee shall not be
deemed to have knowledge of any

                                      -57-
<PAGE>

Default or Event of Default except: (1) any Event of Default occurring pursuant
to Section 6.01(a) or 6.01(b) hereof; or (2) any Default or Event of Default of
which is Responsible Officer shall have received written notification or
obtained actual knowledge.

Section 7.03. Individual Rights of Trustee.

     The Trustee in its individual or any other capacity may become the owner or
pledgee of Notes and may otherwise deal with the Company, any Guarantor or any
Affiliate of the Company with the same rights it would have if it were not
Trustee.  However, in the event that the Trustee acquires any conflicting
interest it must eliminate such conflict within 90 days, apply to the SEC for
permission to continue as trustee or resign.  Any Agent may do the same with
like rights and duties. The Trustee is also subject to Sections 7.10 and 7.11
hereof.

Section 7.04. Trustee's Disclaimer.

     The Trustee shall not be responsible for and makes no representation as to
the validity or adequacy of this Indenture or the Notes, it shall not be
accountable for the Company's use of the proceeds from the Notes or any money
paid to the Company or upon the Company's direction under any provision of this
Indenture, it shall not be responsible for the use or application of any money
received by any Paying Agent other than the Trustee, and it shall not be
responsible for any statement or recital herein or any statement in the Notes or
any other document in connection with the sale of the Notes or pursuant to this
Indenture other than its certificate of authentication.

Section 7.05. Notice of Defaults.

     If a Default or Event of Default occurs and is continuing and if it is
known to the Trustee, the Trustee shall mail to Holders of Notes a notice of the
Default or Event of Default within 90 days after it occurs.  Except in the case
of a Default or Event of Default in payment of principal of, premium, if any, or
interest on any Note, the Trustee may withhold the notice if and so long as a
committee of its Responsible Officers in good faith determines that withholding
the notice is in the interests of the Holders of the Notes.

Section 7.06. Reports by Trustee to Holders of the Notes.

     Within 60 days after each May 15 beginning with the May 15 following the
Issue Date, and for so long as Notes remain outstanding, the Trustee shall mail
to the Holders of the Notes a brief report dated as of such reporting date that
complies with TIA (S) 313(a) (but if no event described in TIA (S) 313(a) has
occurred within the twelve months preceding the reporting date, no report need
be transmitted).  The Trustee also shall comply with TIA (S) 313(b)(2) and (S)
313(b)(1).  The Trustee shall also transmit by mail all reports as required by
TIA (S) 313(c).

     A copy of each report at the time of its mailing to the Holders of Notes
shall be mailed to the Company and filed with the SEC and each stock exchange on
which the Notes are listed in accordance with TIA (S) 313(d).  The Company shall
promptly notify the Trustee when the Notes are listed on any stock exchange.

                                      -58-
<PAGE>

Section 7.07. Compensation and Indemnity.

     The Company shall pay to the Trustee from time to time reasonable
compensation for its acceptance of this Indenture and services hereunder.  The
Trustee's compensation shall not be limited by any law on compensation of a
trustee of an express trust.  The Company shall reimburse the Trustee promptly
upon request for all reasonable disbursements, advances and expenses incurred or
made by it in addition to the compensation for its services.  Such expenses
shall include the reasonable compensation, disbursements and expenses of the
Trustee's agents and counsel.

     The Company and the Guarantors shall indemnify the Trustee against any and
all losses, liabilities or expenses incurred by it arising out of or in
connection with the acceptance or administration of its duties under this
Indenture, including the costs and expenses of enforcing this Indenture against
the Company (including this Section 7.07) and defending itself against any claim
(whether asserted by the Company, any Guarantor or any Holder or any other
person) or liability in connection with the exercise or performance of any of
its powers or duties hereunder, except to the extent any such loss, liability or
expense may be attributable to its negligence, bad faith or willful misconduct.
The Trustee shall notify the Company promptly of any claim for which it may seek
indemnity.  Failure by the Trustee to so notify the Company shall not relieve
the Company or the Guarantors of their obligations hereunder.  The Company shall
defend the claim and the Trustee shall cooperate in the defense.  The Trustee
may have separate counsel and the Company shall pay the reasonable fees and
expenses of such counsel.  The Company need not pay for any settlement made
without its consent, which consent shall not be unreasonably withheld.

     The obligations of the Company and the Guarantors under this Section 7.07
shall survive the satisfaction and discharge of this Indenture.

     To secure the Company's payment obligations in this Section 7.07, the
Trustee shall have a Lien prior to the Notes on all money or property held or
collected by the Trustee, except that held in trust to pay principal and
interest on particular Notes.  Such Lien shall survive the satisfaction and
discharge of this Indenture.

     When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 6.01(i) or (j) hereof occurs, the expenses and the
compensation for the services (including the fees and expenses of its agents and
counsel) are intended to constitute expenses of administration under any
Bankruptcy Law.

     The Trustee shall comply with the provisions of TIA (S) 313(b)(2) to the
extent applicable.

Section 7.08. Replacement of Trustee.

     A resignation or removal of the Trustee and appointment of a successor
Trustee shall become effective only upon the successor Trustee's acceptance of
appointment as provided in this Section 7.08.

                                      -59-
<PAGE>

     The Trustee may resign in writing at any time and be discharged from the
trust hereby created by so notifying the Company.  The Holders of Notes of a
majority in principal amount of the then outstanding Notes may remove the
Trustee by so notifying the Trustee and the Company in writing.  The Company may
remove the Trustee if:

          (a) the Trustee fails to comply with Section 7.10 hereof;

          (b) the Trustee is adjudged a bankrupt or an insolvent or an order for
     relief is entered with respect to the Trustee under any Bankruptcy Law;

          (c) a Custodian or public officer takes charge of the Trustee or its
     property; or

          (d) the Trustee becomes incapable of acting.

     If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee.  Within one year after the successor Trustee takes office, the Holders
of a majority in principal amount of the then outstanding Notes may appoint a
successor Trustee to replace the successor Trustee appointed by the Company.

     If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company, or
the Holders of Notes of at least 10% in principal amount of the then outstanding
Notes may petition any court of competent jurisdiction for the appointment of a
successor Trustee.

     If the Trustee, after written request by any Holder of a Note who has been
a Holder of a Note for at least six months, fails to comply with Section 7.10
hereof, such Holder of a Note may petition any court of competent jurisdiction
for the removal of the Trustee and the appointment of a successor Trustee.

     A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company.  Thereupon, the resignation or
removal of the retiring Trustee shall become effective, and the successor
Trustee shall have all the rights, powers and duties of the Trustee under this
Indenture.  The successor Trustee shall mail a notice of its succession to
Holders of the Notes.  The retiring Trustee shall promptly transfer all property
held by it as Trustee to the successor Trustee, provided all sums owing to the
Trustee hereunder have been paid and subject to the Lien provided for in Section
7.07 hereof.  Notwithstanding replacement of the Trustee pursuant to this
Section 7.08, the Company's obligations under Section 7.07 hereof shall continue
for the benefit of the retiring Trustee.

Section 7.09. Successor Trustee by Merger, etc.

     If the Trustee consolidates, merges or converts into, or transfers all or
substantially all of its corporate trust business to, another corporation, the
successor corporation without any further act shall be the successor Trustee.
As soon as practicable, the successor Trustee shall mail a notice of its
succession to the Company and the Holders of the Notes.

                                      -60-
<PAGE>

Section 7.10. Eligibility; Disqualification.

     There shall at all times be a Trustee hereunder that is a corporation
organized and doing business under the laws of the United States of America or
of any state thereof that is authorized under such laws to exercise corporate
trustee power, that is subject to supervision or examination by federal or state
authorities and that has a combined capital and surplus of at least $100 million
as set forth in its most recent published annual report of condition.

     This Indenture shall always have a Trustee who satisfies the requirements
of TIA (S) 310(a)(1), (2) and (5).  The Trustee is subject to TIA (S) 310(b).
For purposes of this Indenture, the Indenture dated as of February 9, 1998,
between the Company and Chase Bank of Texas, National Association relating to
the Company's 9 1/8% Senior Notes due 2006 shall be excluded from the operation
of TIA (S) 310(b).

Section 7.11. Preferential Collection of Claims Against Company.

     The Trustee is subject to TIA (S) 311(a), excluding any creditor
relationship listed in TIA (S) 311(b).  A Trustee who has resigned or been
removed shall be subject to TIA (S) 311(a) to the extent indicated therein.

                                   ARTICLE 8
                   LEGAL DEFEASANCE AND COVENANT DEFEASANCE

Section 8.01. Option to Effect Legal Defeasance or Covenant Defeasance.

     The Company may, at the option of its Board of Directors evidenced by a
resolution set forth in an Officers' Certificate, at any time, exercise its
rights under either Section 8.02 or 8.03 hereof with respect to all outstanding
Notes upon compliance with the conditions set forth below in this Article 8.

Section 8.02. Legal Defeasance and Discharge.

     Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.02, the Company shall, subject to the satisfaction
of the conditions set forth in Section 8.04 hereof, be deemed to have discharged
its obligations with respect to all outstanding Notes, and each Guarantor shall
be deemed to have discharged its obligations with respect to its Subsidiary
Guarantee, on the date the conditions set forth in Section 8.04 below are
satisfied (hereinafter, "Legal Defeasance").  For this purpose, Legal Defeasance
means that the Company shall be deemed to have paid and discharged the entire
Indebtedness represented by the outstanding Notes, and each Guarantor shall be
deemed to have paid and discharged its Subsidiary Guarantee (which in each case
shall thereafter be deemed to be "outstanding" only for the purposes of Section
8.05 hereof and the other Sections of this Indenture referred to in (a) and (b)
below) and to have satisfied all its other obligations under such Notes or
Subsidiary Guarantee and this Indenture (and the Trustee, on demand of and at
the expense of the Company, shall execute proper instruments acknowledging the
same), except for the following provisions which shall survive until otherwise
terminated or

                                      -61-
<PAGE>

discharged hereunder: (a) the rights of Holders of outstanding Notes to receive
solely from the trust fund described in Section 8.04 hereof, and as more fully
set forth in such Section, payments in respect of the principal of and premium,
if any, interest and Liquidated Damages, if any, on such Notes when such
payments are due, (b) the Company's obligations with respect to such Notes under
Sections 2.03, 2.04, 2.07, 2.10 and 4.02 hereof, (c) the rights, powers, trusts,
duties and immunities of the Trustee hereunder and the Company's obligations in
connection therewith and (d) this Article 8. Subject to compliance with this
Article 8, the Company may exercise its option under this Section 8.02
notwithstanding the prior exercise of its option under Section 8.03 hereof.

Section 8.03. Covenant Defeasance.

     Upon the Company's exercise under Section 8.01 hereof of the option
applicable to this Section 8.03, the Company and each Guarantor shall, subject
to the satisfaction of the conditions set forth in Section 8.04 hereof, be
released from its obligations under the covenants contained in Article 4 (other
than those in Sections 4.01, 4.02, 4.06 and 4.14) and in clauses (c) and (d) of
Section 5.01 hereof on and after the date the conditions set forth below are
satisfied (hereinafter, "Covenant Defeasance"), and the Notes shall thereafter
be deemed not "outstanding" for the purposes of any direction, waiver, consent
or declaration or act of Holders (and the consequences of any thereof) in
connection with such covenants, but shall continue to be deemed "outstanding"
for all other purposes hereunder (it being understood that such Notes shall not
be deemed outstanding for accounting purposes).  For this purpose, Covenant
Defeasance means that, with respect to the outstanding Notes, the Company and
any Guarantor may omit to comply with and shall have no liability in respect of
any term, condition or limitation set forth in any such covenant, whether
directly or indirectly, by reason of any reference elsewhere herein to any such
covenant or by reason of any reference in any such covenant to any other
provision herein or in any other document and such omission to comply shall not
constitute a Default or an Event of Default under Section 6.01 hereof, but,
except as specified above, the remainder of this Indenture and such Notes shall
be unaffected thereby.  In addition, upon the Company's exercise under Section
8.01 hereof of the option applicable to this Section 8.03 hereof, subject to the
satisfaction of the conditions set forth in Section 8.04 hereof, Sections
6.01(e) through 6.01(g) hereof shall not constitute Events of Default.

Section 8.04. Conditions to Legal or Covenant Defeasance.

     In order to exercise either Legal Defeasance or Covenant Defeasance:

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

          (b) in the case of an election under Section 8.02 hereof, the Company
     shall have delivered to the Trustee an Opinion of Counsel in the United
     States reasonably acceptable

                                      -62-
<PAGE>

     to the Trustee confirming that (A) the Company has received from, or there
     has been published by, the Internal Revenue Service a ruling or (B) since
     the Issue Date, there has been a change in the applicable federal income
     tax law, in either case to the effect that, and based thereon such Opinion
     of Counsel shall confirm that, the Holders of the outstanding Notes will
     not recognize income, gain or loss for federal income tax purposes as a
     result of such Legal Defeasance and will be subject to federal income tax
     on the same amounts, in the same manner and at the same times as would have
     been the case if such Legal Defeasance had not occurred;

          (c) in the case of an election under Section 8.03 hereof, the Company
     shall have delivered to the Trustee an Opinion of Counsel in the United
     States reasonably acceptable to the Trustee confirming that the Holders of
     the outstanding Notes will not recognize income, gain or loss for federal
     income tax purposes as a result of such Covenant Defeasance and will be
     subject to federal income tax on the same amounts, in the same manner and
     at the same times as would have been the case if such Covenant Defeasance
     had not occurred;

          (d) no Default or Event of Default shall have occurred and be
     continuing on the date of such deposit (other than a Default or Event of
     Default resulting from the incurrence of Indebtedness, all or a portion of
     the proceeds of which will be used to defease the Notes pursuant to this
     Article 8 concurrently with such incurrence or within 30 days thereof);

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

          (f) the Company shall have delivered to the Trustee an Opinion of
     Counsel (which may be based on such solvency certificates or solvency
     opinions as counsel deems necessary or appropriate) to the effect that the
     trust funds will not be subject to the effect of any applicable bankruptcy,
     insolvency, reorganization or similar laws affecting creditors' rights
     generally;

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

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

                                      -63-
<PAGE>

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

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

     The Company shall pay and indemnify the Trustee against any tax, fee or
other charge imposed on or assessed against the cash or non-callable Government
Securities deposited pursuant to Section 8.04 hereof or the principal and
interest received in respect thereof other than any such tax, fee or other
charge which by law is for the account of the Holders of the outstanding Notes.

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

Section 8.06. Repayment to Company.

     Subject to applicable escheat and abandoned property laws, any money
deposited with the Trustee or any Paying Agent, or then held by the Company, in
trust for the payment of the principal of, premium or Liquidated Damages, if
any, or interest on any Note and remaining unclaimed for two years after such
principal, and premium or Liquidated Damages, if any, or interest has become due
and payable shall be paid to the Company on its request or (if then held by the
Company) shall be discharged from such trust; and the Holder of such Note shall
thereafter, as a secured creditor, look only to the Company for payment thereof,
and all liability of the Trustee or such Paying Agent with respect to such trust
money, and all liability of the Company as trustee thereof, shall thereupon
cease; provided, however, that the Trustee or such Paying Agent, before being
required to make any such repayment, may at the expense of the Company cause to
be published once, in the New York Times and The Wall Street Journal (national
edition), notice that such money remains unclaimed and that, after a date
specified therein, which shall not be less than 30 days from the date of such
notification or publication, any unclaimed balance of such money then remaining
will be repaid to the Company.

                                      -64-
<PAGE>

Section 8.07. Reinstatement.

     If the Trustee or Paying Agent is unable to apply any United States dollars
or non-callable Government Securities in accordance with Section 8.05 hereof, by
reason of any order or judgment of any court or governmental authority
enjoining, restraining or otherwise prohibiting such application, then the
Company's obligations under this Indenture and the Notes shall be revived and
reinstated as though no deposit had occurred pursuant to Section 8.02 or 8.03
hereof until such time as the Trustee or Paying Agent is permitted to apply all
such money in accordance with Section 8.05 hereof; provided, however, that, if
the Company makes any payment of principal of, premium, if any, or interest on
any Note following the reinstatement of its obligations, the Company shall be
subrogated to the rights of the Holders of such Notes to receive such payment
from the money held by the Trustee or Paying Agent.

                                   ARTICLE 9
                       AMENDMENT, SUPPLEMENT AND WAIVER

Section 9.01. Without Consent of Holders of Notes.

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

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

          (b) to provide for uncertificated Notes in addition to or in place of
     certificated Notes;

          (c) to provide for the assumption of the Company's obligations to the
     Holders of the Notes pursuant to Article 5 hereof;

          (d) to secure the Notes pursuant to the requirements of Section 4.12
     or otherwise;

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

          (f) to comply with Article 10 hereof;

          (g) to add any Guarantor or to release any Guarantor from its
     Subsidiary Guarantee, in each as provided in this Indenture; or

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

     Upon the request of the Company accompanied by a resolution of its Board of
Directors authorizing the execution of any such amended or supplemental
indenture, and upon receipt by the

                                      -65-
<PAGE>

Trustee of the documents described in Section 7.02 hereof, the Trustee shall
join with the Company and the Guarantors in the execution of any amended or
supplemental indenture authorized or permitted by the terms of this Indenture
and to make any further appropriate agreements and stipulations that may be
therein contained, but the Trustee shall not be obligated to enter into such
amended or supplemental Indenture that affects its own rights, duties or
immunities under this Indenture or otherwise.

Section 9.02. With Consent of Holders of Notes.

     Except as provided below in this Section 9.02, the Company, the Guarantors
and the Trustee may amend or supplement this Indenture and the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes then outstanding (including, without
limitation, consents obtained in connection with a purchase of, or tender offer
or exchange offer for, the Notes), and, subject to Sections 6.04 and 6.07
hereof, any existing Default or Event of Default or compliance with any
provision of this Indenture or the Notes may be waived with the consent of the
Holders of a majority in principal amount of the then outstanding Notes
(including consents obtained in connection with a tender offer or exchange offer
for the Notes).

     Upon the request of the Company accompanied by a resolution of its Board of
Directors authorizing the execution of any such amended or supplemental
indenture, and upon the filing with the Trustee of evidence satisfactory to the
Trustee of the consent of the Holders of Notes as aforesaid, and upon receipt by
the Trustee of the documents described in Section 9.06 hereof, the Trustee shall
join with the Company and the Guarantors in the execution of such amended or
supplemental indenture unless such amended or supplemental indenture affects the
Trustee's own rights, duties or immunities under this Indenture or otherwise, in
which case the Trustee may in its discretion, but shall not be obligated to,
enter into such amended or supplemental indenture.

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

     After an amendment, supplement or waiver under this Section becomes
effective, the Company shall mail to the Holders of Notes affected thereby a
notice briefly describing the amendment, supplement or waiver.  Any failure of
the Company to mail such notice, or any defect therein, shall not, however, in
any way impair or affect the validity of any such amended or supplemental
Indenture or waiver.  Subject to Sections 6.04 and 6.07 hereof, the Holders of a
majority in principal amount of the Notes then outstanding may waive compliance
in a particular instance by the Company with any provision of this Indenture or
the Notes.  However, without the consent of each Holder affected, an amendment,
supplement or waiver may not (with respect to any Notes held by a non-consenting
Holder):

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

                                      -66-
<PAGE>

          (b) reduce the principal of or change the fixed maturity of any Note
     or alter any of the provisions with respect to the redemption of the Notes
     (except as provided in Sections 3.09, 4.10 and 4.15 hereof);

          (c) reduce the rate of or change the time for payment of interest on
     any Note;

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

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

          (f) make any change in the provisions of this Indenture relating to
     waivers of past Defaults or Events of Default or the rights of Holders of
     Notes to receive payments of principal of or premium, interest or
     Liquidated Damages, if any, on the Notes (except as permitted in clause (g)
     below);

          (g) waive a redemption payment with respect to any Note (other than a
     payment required by Sections 4.10 and 4.15 hereof);

          (h) make any change in the ranking of the Notes relative to other
     Indebtedness of the Company or in the Subsidiary Guarantees, in either case
     in a manner adverse to the Holders of Notes; or

          (i) make any change in the foregoing amendment, supplement and waiver
     provisions.

Section 9.03. Compliance with Trust Indenture Act.

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

Section 9.04. Revocation and Effect of Consents.

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

                                      -67-
<PAGE>

Section 9.05. Notation on or Exchange of Notes.

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

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

Section 9.06. Trustee to Sign Amendments, etc.

     The Trustee shall sign any amended or supplemental indenture authorized
pursuant to this Article 9 if the amendment or supplement does not adversely
affect the rights, duties, liabilities or immunities of the Trustee.  The
Company may not sign an amendment or supplemental indenture until the Board of
Directors approves it.  In executing any amended or supplemental indenture, the
Trustee shall be entitled to receive and (subject to Section 7.01) shall be
fully protected in relying upon, an Officers' Certificate and an Opinion of
Counsel stating that the execution of such amended or supplemental indenture is
authorized or permitted by this Indenture.

                                  ARTICLE 10
                              GUARANTEES OF NOTES

Section 10.01. Subsidiary Guarantees.

     Subject to Section 10.06 hereof, the Guarantors hereby, jointly and
severally, unconditionally guarantee to each Holder of a Note authenticated and
delivered by the Trustee and to the Trustee and its successors and assigns,
irrespective of the validity and enforceability of this Indenture, the Notes
held thereby and the Obligations of the Company hereunder and thereunder, that:
(a) the principal of and premium, interest and Liquidated Damages, if any, on
the Notes will be promptly paid in full when due, subject to any applicable
grace period, whether at maturity, by acceleration, redemption or otherwise, and
interest on the overdue principal, premium, (to the extent permitted by law)
interest and Liquidated Damages, if any, on the Notes, and all other payment
Obligations of the Company to the Holders or the Trustee hereunder or thereunder
will be promptly paid in full and performed, all in accordance with the terms
hereof and thereof; and (b) in case of any extension of time of payment or
renewal of any Notes or any of such other Obligations, the same will be promptly
paid in full when due or performed in accordance with the terms of the extension
or renewal, subject to any applicable grace period, whether at stated maturity,
by acceleration, redemption or otherwise. Failing payment when so due of any
amount so guaranteed or any performance so guaranteed for whatever reason the
Guarantors will be jointly and severally obligated to pay the same immediately.
An Event of Default under this Indenture or the Notes shall constitute an event
of default under the Subsidiary Guarantees, and shall entitle the Holders to
accelerate the obligations of the Guarantors hereunder in the same manner and to
the same extent as the Obligations of the Company.  The Guarantors hereby agree
that their obligations hereunder shall be unconditional, irrespective of the
validity, regularity or enforceability of the Notes or this Indenture, the
absence of any action to enforce the same, any waiver or consent by any Holder
with respect to any provisions hereof or

                                      -68-
<PAGE>

thereof, the recovery of any judgment against the Company, any action to enforce
the same or any other circumstance (other than complete performance) which might
otherwise constitute a legal or equitable discharge or defense of a Guarantor.
Each Guarantor further, to the extent permitted by law, hereby waives diligence,
presentment, demand of payment, filing of claims with a court in the event of
insolvency or bankruptcy of the Company, any right to require a proceeding first
against the Company, protest, notice and all demands whatsoever and covenants
that this Subsidiary Guarantee will not be discharged except by complete
performance of the Obligations contained in the Notes and this Indenture. If any
Holder or the Trustee is required by any court or otherwise to return to the
Company, the Guarantors, or any Custodian, Trustee or other similar official
acting in relation to either the Company or the Guarantors, any amount paid by
the Company or any Guarantor to the Trustee or such Holder, the Subsidiary
Guarantees, to the extent theretofore discharged, shall be reinstated in full
force and effect. Each Guarantor agrees that it shall not be entitled to, and
hereby waives, any right of subrogation in relation to the Holders in respect of
any Obligations guaranteed hereby. Each Guarantor further agrees that, as
between the Guarantors, on the one hand, and the Holders and the Trustee, on the
other hand, (a) the maturity of the Obligations guaranteed hereby may be
accelerated as provided in Article 6 hereof for the purposes of its Subsidiary
Guarantee, notwithstanding any stay, injunction or other prohibition preventing
such acceleration in respect of the Obligations guaranteed thereby, and (b) in
the event of any declaration of acceleration of such Obligations as provided in
Article 6 hereof, such Obligations (whether or not due and payable) shall
forthwith become due and payable by the Guarantor for the purpose of its
Subsidiary Guarantee. The Guarantors shall have the right to seek contribution
from any non-paying Guarantor so long as the exercise of such right does not
impair the rights of the Holders under the Subsidiary Guarantees.

Section 10.02. Execution and Delivery of Subsidiary Guarantee.

     To evidence its Subsidiary Guarantee set forth in Section 10.01 hereof,
each Guarantor hereby agrees that a notation of such Subsidiary Guarantee
substantially in the form of Exhibit D hereto shall be endorsed by manual or
facsimile signature by an Officer of such Guarantor on each Note authenticated
and delivered by the Trustee and that this Indenture shall be executed on behalf
of such Guarantor by an Officer of such Guarantor.

     To the extent required by the provisions of Section 4.13 hereof, the
Company shall cause each of its Restricted Subsidiaries to execute a Subsidiary
Guarantee substantially in the form of Exhibit D.  Such Subsidiary Guarantee
shall be accompanied by a supplemental indenture substantially in the form of
Exhibit E, along with the Opinion of Counsel and Officers' Certificate required
under Section 9.06 of this Indenture; provided, however, that any Subsidiary
that has been properly designated as an Unrestricted Subsidiary in accordance
with this Indenture need not execute a Subsidiary Guarantee for so long as it
continues to constitute an Unrestricted Subsidiary.

     Each Guarantor hereby agrees that its Subsidiary Guarantee shall remain in
full force and effect notwithstanding any failure to endorse on each Note a
notation of such Subsidiary Guarantee.

                                      -69-
<PAGE>

     If an Officer whose signature is on the Subsidiary Guarantee no longer
holds that office at the time the Trustee authenticates the Note on which a
Subsidiary Guarantee is endorsed, the Subsidiary Guarantee shall be valid
nevertheless.

     The delivery of any Note by the Trustee, after the authentication thereof
hereunder, shall constitute due delivery of the Subsidiary Guarantees on behalf
of the Guarantors.

Section 10.03. Guarantors May Consolidate, etc., on Certain Terms.

     (a) Except as set forth in Articles 4 and 5 hereof, nothing contained in
this Indenture shall prohibit a merger between a Guarantor and another Guarantor
or a merger between a Guarantor and the Company.

     (b) No Guarantor shall consolidate with or merge with or into (whether or
not such Guarantor is the surviving Person), another Person (other than the
Company or another Guarantor), whether or not affiliated with such Guarantor,
unless, (i) subject to the provisions of Section 10.04 hereof, the Person formed
by or surviving any such consolidation or merger (if other than such Guarantor)
assumes all the obligations of such Guarantor pursuant to a supplemental
indenture, substantially in the form of Exhibit E hereto, under the Notes and
this Indenture; (ii) immediately after giving effect to such transaction, no
Default or Event of Default exists; (iii) such Guarantor, or any Person formed
by or surviving any such consolidation or merger, would have Consolidated Net
Worth (immediately after giving effect to such transaction), equal to or greater
than the Consolidated Net Worth of such Guarantor immediately preceding the
transaction; and (iv) the Company, at the time of such transaction and after
giving pro forma effect thereto as if such transaction had occurred at the
beginning of the applicable four-quarter period, would be permitted to incur at
least $1.00 of additional Indebtedness pursuant to the Consolidated Interest
Coverage Ratio test set forth in Section 4.09 hereof.

     (c) In the case of any such consolidation or merger and upon the assumption
by the successor Person, by supplemental indenture, executed and delivered to
the Trustee and substantially in the form of Exhibit E hereto, of the Subsidiary
Guarantee and the due and punctual performance of all of the covenants of this
Indenture to be performed by the Guarantor, such successor Person shall succeed
to and be substituted for the Guarantor with the same effect as if it had been
named herein as a Guarantor; provided, however, that, solely for purposes of
computing Consolidated Net Income for purposes of clause (c) of the first
paragraph of Section 4.07 hereof, the Consolidated Net Income of any Person
other than the Company and its Restricted Subsidiaries shall only be included
for periods subsequent to the effective time of such merger or consolidation.
Such successor Person thereupon may cause to be signed any or all of the
notations of Subsidiary Guarantees to be endorsed upon all of the Notes issuable
hereunder which theretofore shall not have been signed by the Company and
delivered to the Trustee.  All of the Subsidiary Guarantees so issued shall in
all respects have the same legal rank and benefit under this Indenture as the
Subsidiary Guarantees theretofore and thereafter issued in accordance with the
terms of this Indenture as though all of such Subsidiary Guarantees had been
issued at the Issue Date.

                                      -70-
<PAGE>

Section 10.04. Releases Following Sale of Assets.

     In the event of a sale or other disposition of all of the assets or Capital
Stock of any Guarantor, by way of merger, consolidation or otherwise, then such
Guarantor (in the event of a sale or other disposition, by way of such a merger,
consolidation or otherwise, of all of the Capital Stock of such Guarantor) or
the Person acquiring the assets (in the event of a sale or other disposition of
all of the assets of such Guarantor) shall be released and relieved of any
obligations under its Subsidiary Guarantee; provided, however, that in the event
such transaction constitutes an Asset Sale, the Net Proceeds from such sale or
other disposition are treated in accordance with the provisions of Section 4.10
hereof; provided, further, that upon such release, the obligations of such
Guarantor in respect of any and all other guarantees of Indebtedness of the
Company or a Guarantor are similarly released.  Upon delivery by the Company to
the Trustee of an Officers' Certificate to the effect of the foregoing, the
Trustee shall execute any documents reasonably required in order to evidence the
release of any Guarantor from its obligations under its Subsidiary Guarantee.
Any Guarantor not released from its obligations under its Subsidiary Guarantee
shall remain liable for the full amount of principal of and premium, interest
and Liquidated Damages, if any, on the Notes and for the other Obligations of
such Guarantor under this Indenture as provided in this Article 10.

Section 10.05. Releases Following Designation as an Unrestricted Subsidiary.

     In the event that the Company designates a Guarantor to be an Unrestricted
Subsidiary, then such Guarantor shall be released and relieved of any
obligations under its Subsidiary Guarantee; provided that such designation is
conducted in accordance with this Indenture.

Section 10.06. Limitation on Guarantor Liability.

     For purposes hereof, each Guarantor's liability under its Subsidiary
Guarantee shall be limited to the lesser of (a) the aggregate amount of the
Obligations of the Company under the Notes and this Indenture and (b) the
amount, if any, which would not have (i) rendered such Guarantor "insolvent" (as
such term is defined in the Bankruptcy Law and in the Debtor and Creditor Law of
the State of New York) or (ii) left such Guarantor with unreasonably small
capital at the time its Subsidiary Guarantee of the Notes was entered into;
provided, however, that, it will be a presumption in any lawsuit or other
proceeding in which a Guarantor is a party that the amount guaranteed pursuant
to the Subsidiary Guarantee is the amount set forth in clause (a) above unless
any creditor, or representative of creditors of such Guarantor, or debtor in
possession or trustee in bankruptcy of the Guarantor, otherwise proves in such a
lawsuit that the aggregate liability of the Guarantor is the amount set forth in
clause (b) above.  In making any determination as to solvency or sufficiency of
capital of a Guarantor in accordance with the previous sentence, the right of
such Guarantor to contribution from other Guarantors, and any other rights such
Guarantor may have, contractual or otherwise, shall be taken into account.

                                      -71-
<PAGE>

Section 10.07. "Trustee" to Include Paying Agent.

     In case at any time any Paying Agent other than the Trustee shall have been
appointed by the Company and be then acting hereunder, the term "Trustee" as
used in this Article 10 shall in each case (unless the context shall otherwise
require) be construed as extending to and including such Paying Agent within its
meaning as fully and for all intents and purposes as if such Paying Agent were
named in this Article 10 in place of the Trustee.

                                  ARTICLE 11
                                 MISCELLANEOUS

Section 11.01. Trust Indenture Act Controls.

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

Section 11.02. Notices.

     Any notice or communication by the Company, any Guarantor or the Trustee to
the others is duly given if in writing (in the English language) and delivered
in person or mailed by first class mail (registered or certified, return receipt
requested), telecopier or overnight air courier guaranteeing next day delivery,
to the others' address:

     If to the Company or the Guarantors:

               Frontier Oil Corporation
               10000 Memorial Drive, Suite 600
               Houston, Texas   77024-3411
               Attention:  Julie H. Edwards
               Telecopier No.:  (713) 688-0616

     With a copy to:

               Andrews & Kurth L.L.P.
               4200 Chase Tower
               600 Travis Street
               Houston, Texas   77002
               Attention:  Christopher Collins
               Telecopier No.:  (713) 220-4285

                                      -72-
<PAGE>

     If to the Trustee:

          (1)  For payment, registration, transfer and exchange of the Notes:

               By Hand:
               -------
               Chase Bank of Texas, National Association
               One Main Place
               1201 Main Street, 18th Floor
               Dallas, Texas   75202
               Attention:  Registered Bond Events
               Telephone No.:  (214) 672-5125 or (800) 275-2048
               Telecopier No.:  (214) 672-5746

               By Mail:
               -------

               Chase Bank of Texas, National Association
               P. O. Box 2320
               Dallas, Texas   75221-2320
               Attention:  Registered Bond Events
               Telephone No.:  (214) 672-5125 or (800) 275-2048
               Telecopier No.:  (214) 672-5746

          (2)  For all other communications relating to the Notes:

               Chase Bank of Texas, National Association
               Capital Markets Fiduciary Services
               600 Travis Street, Suite 1150
               Houston, Texas   77002
               Attention:  Mauri J. Cowen
               Telephone No.:  (713) 216-5811
               Telecopier No.:  (713) 577-5200

     If to the Paying Agent:

               Chase Bank of Texas, National Association
               c/o The Chase Manhattan Bank
               55 Water Street, North Building
               Room 234, Windows 20 and 21
               New York, New York   10041
               Telephone No.:  (212) 638-0454
               Telecopier No.:  (212) 638-7380 or (212) 638-7381

     The Company, any of the Guarantors or the Trustee, by notice to the others
may designate additional or different addresses for subsequent notices or
communications.

                                      -73-
<PAGE>

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

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

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

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

Section 11.03. Communication by Holders of Notes with Other Holders of Notes.

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

Section 11.04. Certificate and Opinion as to Conditions Precedent.

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

          (a) an Officers' Certificate in form and substance reasonably
     satisfactory to the Trustee (which shall include the statements set forth
     in Section 11.05 hereof) stating that, in the opinion of the signers, all
     conditions precedent and covenants, if any, provided for in this Indenture
     relating to the proposed action have been satisfied; and

          (b) an Opinion of Counsel in form and substance reasonably
     satisfactory to the Trustee (which shall include the statements set forth
     in Section 11.05 hereof) stating that, in the opinion of such counsel, all
     such conditions precedent and covenants have been satisfied.

Section 11.05. Statements Required in Certificate or Opinion.

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

                                      -74-
<PAGE>

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

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

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

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

Section 11.06. Rules by Trustee and Agents.

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

Section 11.07. No Personal Liability of Directors, Officers, Employees and
               Stockholders.

     No past, present or future director, officer, employee, incorporator or
stockholder of the Company or any Guarantor, as such, shall have any liability
for any obligations of the Company or any Guarantor under the Notes, the
Subsidiary Guarantees, this Indenture or for any claim based on, in respect of,
or by reason of, such obligations or their creation.  Each Holder by accepting a
Note waives and releases all such liability.  The waiver and release are part of
the consideration for issuance of the Notes.

Section 11.08. Governing Law.

     THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE AND
ENFORCE THIS INDENTURE, THE NOTES AND THE SUBSIDIARY GUARANTEES.

Section 11.09. No Adverse Interpretation of Other Agreements.

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

                                      -75-
<PAGE>

Section 11.10. Successors.

     All agreements of the Company and the Guarantors in this Indenture and the
Notes shall bind their successors.  All agreements of the Trustee in this
Indenture shall bind its successors.

Section 11.11. Severability.

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

Section 11.12. Counterpart Originals.

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

Section 11.13. Table of Contents, Headings, etc.

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

                        [Signatures on following page]

                                      -76-
<PAGE>

                                   SIGNATURES


                                      FRONTIER OIL CORPORATION



                                      By: /s/ Julie H. Edwards
                                          --------------------------------
                                      Name:  Julie H. Edwards
                                      Title: Senior Vice President-Finance
                                             and Chief Financial Officer


                                      CHASE BANK OF TEXAS,
                                      NATIONAL ASSOCIATION, as Trustee



                                      By: /s/ Mauri Cowen
                                          --------------------------------
                                      Name:  Mauri J. Cowen
                                      Title: Vice President and Trust Officer
<PAGE>

                                                                     EXHIBIT A-1

                                (Face of Note)

             11 3/4% Senior Notes due 2009, [Series A] [Series B]

No. _______________
      CUSIP NO.

                           FRONTIER OIL CORPORATION

promises to pay to __________ or registered assigns, the principal sum of
___________ Dollars on November 15, 2009.

                Interest Payment Dates: May 15 and November 15

                      Record Dates:  May 1 and November 1


                                        FRONTIER OIL CORPORATION

(SEAL)

ATTEST:                                 By:___________________________
                                           Name:
                                           Title:



____________________________
Name:
Title:


Trustee's Certificate of Authentication:

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

CHASE BANK OF TEXAS,
  NATIONAL ASSOCIATION, as Trustee



By:_________________________
   Authorized Signatory


Dated: _____________________


                                     A-1-1
<PAGE>

                                (Back of Note)

             11 3/4% SENIOR NOTES DUE 2009, [SERIES A] [SERIES B]

     [Unless and until it is exchanged in whole or in part for Notes in
definitive form, this Note may not be transferred except as a whole by the
Depository to a nominee of the Depository or by a nominee of the Depository to
the Depository or another nominee of the Depository or by the Depository or any
such nominee to a successor Depository or a nominee of such successor
Depository.  Unless this certificate is presented by an authorized
representative of The Depository Trust Company (55 Water Street, New York, New
York) ("DTC"), to the issuer or its agent for registration of transfer, exchange
or payment, and any certificate issued is registered in the name of Cede & Co.
or such other name as may be requested by an authorized representative of DTC
(and any payment is made to Cede & Co. or such other entity as may be requested
by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE
HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL in as much as the
registered owner hereof, Cede & Co., has an interest herein.]/1/

          [THE NOTE (OR ITS PREDECESSOR) EVIDENCED HEREBY HAS NOT BEEN
     REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE
     "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT
     BE OFFERED, SOLD OR OTHERWISE TRANSFERRED EXCEPT AS SET FORTH IN THE
     FOLLOWING SENTENCE.  EACH PURCHASER OF THE NOTE EVIDENCED HEREBY IS HEREBY
     NOTIFIED THAT THE SELLER MAY BE RELYING ON THE EXEMPTION FROM THE
     PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A
     THEREUNDER.  BY ITS ACQUISITION HEREOF, THE HOLDER:  REPRESENTS THAT (1) IT
     IS (A) A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE
     SECURITIES ACT) OR (B) AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED
     IN RULE 501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT)
     ("INSTITUTIONAL ACCREDITED INVESTOR") OR (C) NOT A U.S. PERSON AND IS
     ACQUIRING THE NOTE EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION; (2) AGREES
     THAT IT WILL NOT RESELL OR OTHERWISE TRANSFER THE NOTE EVIDENCED HEREBY
     EXCEPT (A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED
     INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT,
     (C) TO AN INSTITUTIONAL ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER,
     FURNISHES TO CHASE BANK OF TEXAS, NATIONAL

- -----------
1. This paragraph should be included only if the Note is issued in global form.

                                     A-1-2
<PAGE>

     ASSOCIATION, AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS APPLICABLE), A SIGNED
     LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
     RESTRICTIONS ON TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM OF WHICH
     LETTER CAN BE OBTAINED FROM SUCH TRUSTEE OR A SUCCESSOR TRUSTEE, AS
     APPLICABLE), (D) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH RULE 904
     UNDER THE SECURITIES ACT, (E) PURSUANT TO THE EXEMPTION FROM REGISTRATION
     PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR IN
     ACCORDANCE WITH ANOTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE
     SECURITIES ACT, OR (F) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
     UNDER THE SECURITIES ACT, AND IN EACH CASE, IN ACCORDANCE WITH ANY
     APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER
     APPLICABLE JURISDICTION; AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON
     TO WHOM THE NOTE EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO
     THE EFFECT OF THIS LEGEND. IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE
     (C), (D) OR (E) ABOVE, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO
     CHASE BANK OF TEXAS, NATIONAL ASSOCIATION, AS TRUSTEE (OR A SUCCESSOR
     TRUSTEE, AS APPLICABLE), SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER
     INFORMATION AS IT MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS
     BEING MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT
     TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. AS USED HEREIN,
     THE TERMS "OFFSHORE TRANSACTIONS," "UNITED STATES" AND "U.S. PERSON" HAVE
     THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.]/2/

- -----------
2. This bracketed provision applies only to Series A Notes that are Transfer
   Restricted Securities, and it should be removed upon the exchange of such
   Series A Notes for Series B Notes in an Exchange Offer or upon the transfer
   of such Series A Notes that have been sold pursuant to the terms of the Shelf
   Registration contemplated by the applicable Registration Rights Agreement.

                                     A-1-3
<PAGE>

     1.   Interest.  Frontier Oil Corporation, a Wyoming corporation (the
"Company"), promises to pay interest on the principal amount of this Note at
11.75% per annum from _______________, until maturity [and shall pay the
Liquidated Damages payable pursuant to the Registration Rights Agreement
referred to below]/2/.  The Company will pay interest and Liquidated Damages,
if any, semi-annually in arrears on May 15 and November 15 of each year,
commencing _______________, or if any such day is not a Business Day, on the
next succeeding Business Day (each an "Interest Payment Date").  Interest on the
Notes will accrue from the most recent date to which interest has been paid or,
if no interest has been paid, from the date of original issuance; provided that
if there is no existing Default or Event of Default in the payment of interest,
and if this Note is authenticated between a record date referred to on the face
hereof and the next succeeding Interest Payment Date, interest shall accrue from
such next succeeding Interest Payment Date, except in the case of the original
issuance of Notes, in which case interest shall accrue from the date of
authentication.  The Company shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue principal and
premium, if any, from time to time on demand at a rate that is the rate then in
effect; it shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest and any
Liquidated Damages (without regard to any applicable grace periods) from time to
time on demand at the same rate to the extent lawful.  Interest will be computed
on the basis of a 360-day year of twelve 30-day months.

     2.   Method of Payment.  The Company will pay interest on the Notes (except
defaulted interest) and Liquidated Damages, if any, to the Persons who are
registered Holders of Notes at the close of business on the May 1 or November 1
next preceding the Interest Payment Date, even if such Notes are canceled after
such record date and on or before such Interest Payment Date, except as provided
in Section 2.12 of the Indenture with respect to defaulted interest.  The Notes
will be payable as to principal, premium, interest and Liquidated Damages, if
any, at the office or agency of the Company maintained for such purpose within
the City and State of New York, or, at the option of the Company, payment of
interest and Liquidated Damages, if any, may be made by check mailed to the
Holders at their addresses set forth in the register of Holders, and provided
that payment by wire transfer of immediately available funds will be required
with respect to principal of and interest, premium and Liquidated Damages, if
any, on all Global Notes and all other Notes the Holders of which shall have
provided wire transfer instructions to the Company or the Paying Agent.  Such
payment shall be in such coin or currency of the United States of America as at
the time of payment is legal tender for payment of public and private debts.

     3.   Paying Agent and Registrar.  Initially, Chase Bank of Texas, National
Association, the Trustee under the Indenture, will act as Paying Agent and
Registrar.  The Company may change any Paying Agent or Registrar without notice
to any Holder.  The Company or any of its Subsidiaries may act in any such
capacity.

- -----------
2. This bracketed provision applies only to Series A Notes that are Transfer
   Restricted Securities, and it should be removed upon the exchange of such
   Series A Notes for Series B Notes in an Exchange Offer or upon the transfer
   of such Series A Notes that have been sold pursuant to the terms of the Shelf
   Registration contemplated by the applicable Registration Rights Agreement.

                                     A-1-4
<PAGE>

     4.   Indenture.  The Company issued the Notes under an Indenture dated as
of November 12, 1999 ("Indenture") between the Company and the Trustee.  The
terms of the Notes include those stated in the Indenture and those made part of
the Indenture by reference to the Trust Indenture Act of 1939, as amended (15
U.S. Code (S)(S) 77aaa-77bbbb).  The Notes are subject to all such terms, and
Holders are referred to the Indenture and such Act for a statement of such
terms. The Notes are general unsecured obligations of the Company limited in
aggregate principal amount to $190,000,000 issued on the Issue Date (the
"Offered Notes") and an unlimited aggregate additional principal amount issuable
thereafter under the terms of the Indenture.

     5.   Optional Redemption.

     (a)  Except as set forth in subparagraph (b) of this Paragraph 5, the
Company shall not have the option to redeem the Notes prior to November 15,
2004.  Thereafter, the Company shall have the option to redeem the Notes, in
whole or in part, upon not less than 30 nor more than 60 days' notice, at the
redemption prices (expressed as percentages of principal amount) set forth below
plus accrued and unpaid interest and Liquidated Damages thereon to the
applicable redemption date, if redeemed during the twelve-month period beginning
on November 15 of the years indicated below:

          YEAR                                        PERCENTAGE
          ----                                        ----------

          2004.......................................   105.875%
          2005.......................................   103.916%
          2006.......................................   101.958%
          2007 and thereafter........................   100.000%

     (b)  Notwithstanding the provisions of subparagraph (a) of this Paragraph 5
the Company may at any time prior to November 15, 2004, at its option, redeem
the Notes, in whole or in part, at the Make-Whole Price plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the redemption date.  In
addition, at any time prior to November 15, 2002, the Company may redeem up to
35% of the aggregate principal amount of Notes originally issued at a redemption
price of 111.75% of the principal amount thereof, plus accrued and unpaid
interest and Liquidated Damages, if any, thereon to the redemption date, with
the net cash proceeds of one or more Qualified Equity Offerings; provided that
(a) at least 65% of the aggregate principal amount of Notes originally issued
remains outstanding immediately after the occurrence of each such redemption and
(b) each such redemption shall occur within 60 days of the date of the closing
of each such Qualified Equity Offering.

     6.   Mandatory Redemption.

     (a)  Except as described in subparagraph (b) of this Paragraph 6 or in
Paragraph 7 below, the Company shall not be required to make mandatory
redemption or sinking fund payments with respect to the Notes.


                                     A-1-5
<PAGE>

     (b)  Subject to the terms and conditions of Section 3.08(b) of the
Indenture, the Company shall be required to redeem all of the Offered Notes on
the Special Mandatory Redemption Date at the redemption price specified in such
Section 3.08(b), plus accrued and unpaid interest on the Offered Notes to the
Special Mandatory Redemption Date,  if the Transaction has not closed on or
prior to the Special Mandatory Redemption Date.

     7.   Repurchase at Option of Holder.

     (a)  If there is a Change of Control, the Company shall be required to make
an offer (a "Change of Control Offer") to repurchase all or any part (equal to
$1,000 or an integral multiple thereof) of each Holder's Notes at a purchase
price equal to 101% of the aggregate principal amount thereof plus accrued and
unpaid interest and Liquidated Damages, if any, thereon to the date of purchase
(the "Change of Control Payment"). Within 30 days following any Change of
Control, the Company shall mail a notice to each Holder describing the
transaction that constitutes the Change of Control and setting forth the
procedures governing the Change of Control Offer as required by the Indenture.

     (b)  If the Company or a Restricted Subsidiary consummates any Asset Sales,
within 30 days of each date on which the aggregate amount of Excess Proceeds
exceeds $10.0 million, the Company shall commence an offer to all Holders of
Notes (an "Asset Sale Offer") pursuant to Section 3.09 of the Indenture to
purchase the maximum principal amount of Notes that may be purchased out of the
Excess Proceeds at an offer price in cash in an amount equal to 100% of the
principal amount thereof plus accrued and unpaid interest and Liquidated
Damages, if any, thereon to the date of purchase, in accordance with the
procedures set forth in the Indenture; provided, however, that, if the Company
is required to apply such Excess Proceeds to repurchase, or to offer to
repurchase, any Pari Passu Indebtedness, the Company shall only be required to
offer to repurchase the maximum principal amount of Notes that may be purchased
out of the amount of such Excess Proceeds multiplied by a fraction, the
numerator of which is the aggregate principal amount of Notes outstanding and
the denominator of which is the aggregate principal amount of Notes outstanding
plus the aggregate principal amount of Pari Passu Indebtedness outstanding.  To
the extent that the aggregate amount of Notes tendered pursuant to an Asset Sale
Offer is less than the Excess Proceeds, the Company (or such Subsidiary) may use
such deficiency for general corporate purposes. If the aggregate principal
amount of Notes surrendered by Holders thereof exceeds the amount of Excess
Proceeds, the Trustee shall select the Notes to be purchased on a pro rata basis
(with such adjustments as may be deemed appropriate by the Trustee so that only
Notes in denominations of $1,000, or integral multiples thereof, shall be
purchased).  Holders of Notes that are the subject of an offer to purchase will
receive an Asset Sale Offer from the Company prior to any related purchase date
and may elect to have such Notes purchased by completing the form entitled
"Option of Holder to Elect Purchase" on the reverse of the Notes.

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


                                     A-1-6
<PAGE>

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

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

     11.  Amendment, Supplement and Waiver.  Subject to certain exceptions, the
Indenture or the Notes may be amended or supplemented with the consent of the
Holders of at least a majority in principal amount of the then outstanding
Notes, and any existing default or compliance with any provision of the
Indenture or the Notes may be waived with the consent of the Holders of a
majority in principal amount of the then outstanding Notes.  Without the consent
of any Holder of a Note, the Indenture or the Notes may be amended or
supplemented to cure any ambiguity, defect or inconsistency, to provide for
uncertificated Notes in addition to or in place of certificated Notes, to
provide for the assumption of the Company's obligations to Holders of the Notes
in case of a merger or consolidation, to make any change that would provide any
additional rights or benefits to the Holders of the Notes or that does not
adversely affect the legal rights under the Indenture of any such Holder, to
secure the Notes pursuant to the requirements of Section 4.12, to add any
Guarantor or to release any Guarantor from its Subsidiary Guarantee, in each
case as provided in the Indenture, or to comply with the requirements of the
Commission in order to effect or maintain the qualification of the Indenture
under the Trust Indenture Act.

     12.  Defaults and Remedies.  Events of Default include:  (i) default for 30
days in the payment when due of interest or Liquidated Damages on the Notes;
(ii) default in payment when due of the principal of or premium, if any, on the
Notes; (iii) failure by the Company to comply with Section 4.10, 4.15 or 5.01 of
the Indenture; (iv) failure by the Company for 60 days after notice to comply
with any of its other agreements in the Indenture, the Notes or the Escrow
Agreement; (v) default under any mortgage, indenture or instrument under which
there may be issued or by which there may be secured or evidenced any
Indebtedness for money borrowed by the Company or any of its Restricted
Subsidiaries (or the payment of which is guaranteed by the Company or any of its
Restricted Subsidiaries), whether such Indebtedness or guarantee now exists or
is created after the Issue Date, which default (a) is caused by a failure to pay
principal of or premium or interest on such Indebtedness prior to the expiration
of any grace period provided in such Indebtedness (a "Payment Default") or (b)
results in the acceleration of such Indebtedness prior to its express maturity
and, in each case, the principal amount of any such Indebtedness, together with
the principal amount of any other such Indebtedness under which there has been a
Payment Default or the maturity of which has been so accelerated, aggregates
$5.0 million or more; and provided, further, that if such default is cured or
waived or any such acceleration rescinded, or such Indebtedness is repaid within
a period

                                     A-1-7
<PAGE>

of 10 days from the continuation of such default beyond the applicable grace
period or the occurrence of such acceleration, as the case may be, an Event of
Default and any consequential acceleration of the Notes shall be automatically
rescinded, so long as said rescission does not conflict with any judgment or
decree; (vi) failure by the Company or any of its Restricted Subsidiaries to pay
final judgments aggregating in excess of $5.0 million (net of applicable
insurance coverage which is acknowledged in writing by the insurer), which
judgments are not paid, discharged or stayed for a period of 60 days; (vii)
failure by any Guarantor to perform any covenant set forth in its Subsidiary
Guarantee, or the repudiation by any Guarantor of its obligations under its
Subsidiary Guarantee or the unenforceability of any Subsidiary Guarantee against
a Guarantor for any reason; (viii) failure of the Escrow Agreement, at any time,
to be in full force and effect (except as provided in the Indenture) or any
contest by the Company or any of its Subsidiaries of the validity or
enforceability of the Escrow Agreement; and (ix) certain events of bankruptcy or
insolvency with respect to the Company or any Guarantor. If any Event of Default
occurs and is continuing, the Trustee or the Holders of at least 25% in
principal amount of the then outstanding Notes may declare all the Notes to be
due and payable. Notwithstanding the foregoing, in the case of an Event of
Default arising from certain events of bankruptcy or insolvency, all outstanding
Notes will become due and payable without further action or notice. Holders may
not enforce the Indenture or the Notes except as provided in the Indenture.
Subject to certain limitations, Holders of a majority in principal amount of the
then outstanding Notes may direct the Trustee in its exercise of any trust or
power. The Trustee may withhold from Holders of the Notes notice of any
continuing Default or Event of Default (except a Default or Event of Default
relating to the payment of principal or interest) if it determines that
withholding notice is in their interest. The Holders of a majority in aggregate
principal amount of the Notes then outstanding by notice to the Trustee may on
behalf of the Holders of all of the Notes waive any existing Default or Event of
Default and its consequences under the Indenture except a continuing Default or
Event of Default in the payment of the principal of or premium, interest or
Liquidated Damages, if any, on the Notes. The Company is required to deliver to
the Trustee annually a statement regarding compliance with the Indenture, and
the Company is required upon becoming aware of any Default or Event of Default,
to deliver to the Trustee a statement specifying such Default or Event of
Default.

     13.  Defeasance.  The Notes are subject to defeasance upon the terms and
conditions specified in the Indenture.

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

     15.  No Recourse Against Others.  A director, officer, employee,
incorporator or stockholder, of the Company or any Guarantor, as such, shall not
have any liability for any obligations of the Company or any Guarantor under the
Notes, the Subsidiary Guarantees or the Indenture or for any claim based on, in
respect of, or by reason of, such obligations or their creation.  Each Holder by
accepting a Note waives and releases all such liability.  The waiver and release
are part of the consideration for the issuance of the Notes.


                                     A-1-8
<PAGE>

     16.  Authentication.  This Note shall not be valid until authenticated by
the manual signature of an authorized signatory of the Trustee or an
authenticating agent.

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

     18.  [Additional Rights of Holders of Transfer Restricted Securities.  In
addition to the rights provided to Holders of Notes under the Indenture, Holders
of Transfer Restricted Securities shall have all the rights set forth in the
Registration Rights Agreement dated as of ____________, between the Company and
each Initial Purchaser named therein (the "Registration Rights
Agreement").]/2/ [No Liquidated Damages.  If the Notes evidenced hereby are
Offered Notes, then, notwithstanding any contrary implication herein, no
Liquidated Damages shall be payable with respect thereto.]/3/

     19.  CUSIP Numbers.  Pursuant to a recommendation promulgated by the
Committee on Uniform Security Identification Procedures, the Company has caused
CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers
in notices of redemption as a convenience to Holders.  No representation is made
as to the accuracy of such numbers either as printed on the Notes or as
contained in any notice of redemption and reliance may be placed only on the
other identification numbers placed thereon.

     The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture and/or the Registration Rights Agreement.
Requests may be made to:

               Frontier Oil Corporation
               10000 Memorial Drive, Suite 600
               Houston, Texas   77024-3411
               Attention:  Secretary






- -----------
2. This bracketed provision applies only to Series A Notes that are Transfer
Restricted Securities, and it should be removed upon the exchange of such Series
A Notes for Series B Notes in an Exchange Offer or upon the transfer of such
Series A Notes that have been sold pursuant to the terms of the Shelf
Registration contemplated by the applicable Registration Rights Agreement.

3. This should be included only if the Note evidences Offered Notes.

                                    A-1-9
<PAGE>

                                ASSIGNMENT FORM

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

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

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

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

and irrevocably appoint ___________________________________________________
to transfer this Note on the books of the Company.  The agent may substitute
another to act for him.

________________________________________________________________________________

Date: __________________

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


                                          Signature Guarantee:







                                    A-1-10
<PAGE>

                      OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Note purchased by the Company pursuant to
Section 4.10 or 4.15 of the Indenture, check the box below:

           [_] Section 4.10         [_] Section 4.15



     If you want to elect to have only part of the Note purchased by the Company
pursuant to Section 4.10 or Section 4.15 of the Indenture, state the amount you
elect to have purchased:  $___________


Date: ______________                    Your Signature: _____________________
                                        (Sign exactly as your name appears on
                                         the Note)

                                        Social Security or
                                        Tax Identification No.: ______________


                                        Signature Guarantee:




                                    A-1-11

<PAGE>

<TABLE>
<CAPTION>
                                                 SCHEDULE OF EXCHANGES OF NOTES/4/
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                 |
- ------------------------------------------------------------------------------------------------------------------------------------

THE FOLLOWING EXCHANGES OF A PART OF THIS GLOBAL NOTE FOR OTHER NOTES HAVE BEEN MADE:
<S>                    <C>                        <C>                          <C>                         <C>
                                                                                Principal Amount of this
                         Amount of decrease in       Amount of increase in       Global Note following      Signature of authorized
                        Principal Amount of this    Principal Amount of this       such decrease (or          officer of Trustee or
  Date of Exchange           Global Note                 Global Note                   increase)                  Note Custodian
  ----------------      ------------------------    ------------------------    ------------------------    -----------------------
</TABLE>











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

                                    A-1-12
<PAGE>

                                                                     EXHIBIT A-2

                 (Face of Regulation S Temporary Global Note)

             11 3/4% SENIOR NOTES DUE 2009, [SERIES A] [SERIES B]

No. _______________
       CUSIP NO.

                           FRONTIER OIL CORPORATION

promises to pay to Cede & Co. or registered assigns, the principal sum of ______
Dollars on November 15, 2009.

                Interest Payment Dates:  May 15 and November 15

                      Record Dates:  May 1 and November 1


                                          FRONTIER OIL CORPORATION

(SEAL)

ATTEST:                                   By:_______________________________
                                             Name:
                                             Title:



__________________________________
Name:
Title:

Trustee's Certificate of Authentication:

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

CHASE BANK OF TEXAS,
  NATIONAL ASSOCIATION, as Trustee



By:________________________________
        Authorized Signatory

Dated:  _____________________

                                     A-2-1
<PAGE>

                 (Back of Regulation S Temporary Global Note)

             11 3/4% SENIOR NOTES DUE 2009, [SERIES A] [SERIES B]

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

     THE NOTE (OR ITS PREDECESSOR) EVIDENCED HEREBY HAS NOT BEEN REGISTERED
UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY
STATE SECURITIES LAWS, AND, ACCORDINGLY, MAY NOT BE OFFERED, SOLD OR OTHERWISE
TRANSFERRED EXCEPT AS SET FORTH IN THE FOLLOWING SENTENCE.  EACH PURCHASER OF
THE NOTE EVIDENCED HEREBY IS HEREBY NOTIFIED THAT THE SELLER MAY BE RELYING ON
THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY
RULE 144A THEREUNDER.  BY ITS ACQUISITION HEREOF, THE HOLDER:  REPRESENTS THAT
(1) IT IS (A) A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER
THE SECURITIES ACT) OR (B) AN INSTITUTIONAL "ACCREDITED INVESTOR" (AS DEFINED IN
RULE 501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT) ("INSTITUTIONAL
ACCREDITED INVESTOR") OR (C) NOT A U.S. PERSON AND IS ACQUIRING THE NOTE
EVIDENCED HEREBY IN AN OFFSHORE TRANSACTION; (2) AGREES THAT IT WILL NOT RESELL
OR OTHERWISE TRANSFER THE NOTE EVIDENCED HEREBY EXCEPT (A) TO THE COMPANY OR ANY
SUBSIDIARY THEREOF, (B) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH
RULE 144A UNDER THE SECURITIES ACT, (C) TO AN INSTITUTIONAL ACCREDITED INVESTOR
THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO CHASE BANK OF TEXAS, NATIONAL
ASSOCIATION, AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS APPLICABLE), A SIGNED LETTER
CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS
ON TRANSFER OF THE NOTE EVIDENCED HEREBY (THE FORM OF WHICH LETTER CAN BE
OBTAINED FROM SUCH TRUSTEE OR A SUCCESSOR TRUSTEE, AS APPLICABLE), (D) OUTSIDE
THE UNITED STATES IN COMPLIANCE WITH RULE 904 UNDER THE SECURITIES ACT, (E)
PURSUANT TO THE EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE
SECURITIES ACT (IF AVAILABLE) OR IN ACCORDANCE WITH ANOTHER EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, OR (F) PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT, AND IN EACH CASE, IN ACCORDANCE
WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY
OTHER APPLICABLE JURISDICTION; AND (3) AGREES THAT IT WILL DELIVER TO EACH
PERSON TO WHOM THE NOTE EVIDENCED HEREBY IS TRANSFERRED A NOTICE SUBSTANTIALLY
TO THE EFFECT OF THIS LEGEND.  IF THE PROPOSED TRANSFER IS PURSUANT TO CLAUSE
(C), (D) OR (E) ABOVE, THE HOLDER MUST, PRIOR TO SUCH TRANSFER, FURNISH TO CHASE
BANK OF TEXAS, NATIONAL ASSOCIATION, AS TRUSTEE (OR A SUCCESSOR TRUSTEE, AS
APPLICABLE), SUCH CERTIFICATIONS, LEGAL OPINIONS OR OTHER INFORMATION AS IT MAY
REASONABLY REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN
EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT.  AS USED HEREIN, THE TERMS "OFFSHORE
TRANSACTIONS," "UNITED STATES"


                                     A-2-2
<PAGE>

AND "U.S. PERSON" HAVE THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE
SECURITIES ACT.

     THE RIGHTS ATTACHING TO THIS REGULATION S TEMPORARY GLOBAL NOTE, AND THE
CONDITIONS AND PROCEDURES GOVERNING ITS EXCHANGE FOR DEFINITIVE NOTES, ARE AS
SPECIFIED IN THE INDENTURE (AS DEFINED HEREIN).

     NEITHER THE HOLDER NOR THE BENEFICIAL OWNERS OF THIS REGULATION S TEMPORARY
GLOBAL NOTE SHALL BE ENTITLED TO RECEIVE PAYMENT OF INTEREST HEREON OR
LIQUIDATED DAMAGES PRIOR TO THE EXCHANGE OF THIS NOTE FOR A REGULATION S
PERMANENT GLOBAL NOTE AS CONTEMPLATED BY THE INDENTURE.

     Frontier Oil Corporation, a Wyoming corporation (the "Company"), promises
to pay interest on the principal amount of this Note at the rate of 11.75% per
annum from ____________, until maturity and shall pay the Liquidated Damages
payable pursuant to the Registration Rights Agreement referred to in the
Indenture.  The Company will pay interest and Liquidated Damages, if any, in
United States dollars semi-annually in arrears on May 15 and November 15,
commencing on ____________, or if any such day is not a Business Day, on the
next succeeding Business Day (each an "Interest Payment Date").  Interest on the
Notes shall accrue from the most recent date to which interest has been paid or,
if no interest has been paid, from the date of original issuance; provided that
if there is no existing Default or Event of Default in the payment of interest,
and if this Note is authenticated between a record date referred to on the face
hereof and the next succeeding Interest Payment Date, interest shall accrue from
such next succeeding Interest Payment Date, except in the case of the original
issuance of Notes, in which case interest shall accrue from the date of
authentication.  The Company shall pay interest (including post-petition
interest in any proceeding under any Bankruptcy Law) on overdue principal and
premium, if any from time to time on demand at a rate equal to the then
applicable interest rate on the Notes; it shall pay interest (including post-
petition interest in any proceeding under any Bankruptcy Law) on overdue
installments of interest and Liquidated Damages (without regard to any
applicable grace period) from time to time on demand at the same rate to the
extent lawful.  Interest shall be computed on the basis of a 360-day year
comprised of twelve 30-day months.

     This Regulation S Temporary Global Note is issued in respect of an issue of
11 3/4% Senior Notes due 2009 (the "Notes") of the Company, limited in aggregate
principal amount to $190,000,000 issued on the Issue Date (the "Offered Notes")
and an unlimited aggregate additional principal amount issuable thereafter under
the terms of the Indenture, plus amounts, if any, sufficient to pay premium, if
any, interest or Liquidated Damages, if any on outstanding Notes.  The Company
has issued the Notes under an Indenture (the "Indenture") dated as of November
12, 1999, between the Company and the Trustee.  This Regulation S Temporary
Global Note is governed by the terms and conditions of the Indenture governing
the Notes, which terms and conditions are incorporated herein by reference and,
except as otherwise provided herein, shall be binding on the Company and the
Holder hereof as if fully set forth herein.  Unless the context otherwise
requires, the terms used herein shall have the meanings specified in the
Indenture.

     Until this Regulation S Temporary Global Note is exchanged for Regulation S
Permanent Global Notes, the Holder hereof shall not be entitled to receive
payments of interest or Liquidated Damages, if any, hereon although interest and
Liquidated Damages, if any, will continue to accrue;

                                     A-2-3
<PAGE>

until so exchanged in full, this Regulation S Temporary Global Note shall in all
other respects be entitled to the same benefits as other Notes under the
Indenture.

     This Regulation S Temporary Global Note is exchangeable in whole or in part
for one or more Regulation S Permanent Global Notes only (i) on or after the
termination of the 40-day restricted period (as defined in Regulation S) and
(ii) upon presentation of certificates required by Article 2 of the Indenture.
Upon exchange of this Regulation S Temporary Global Note for one or more
Regulation S Permanent Global Notes, the Trustee shall cancel this Regulation S
Temporary Global Note.

     This Regulation S Temporary Global Note shall not become valid or
obligatory until the certificate of authentication hereon shall have been duly
manually signed by an authorized signatory of the Trustee in accordance with the
Indenture.  This Regulation S Temporary Global Note shall be governed by and
construed in accordance with the laws of the State of the New York.  All
references to "$," "Dollars," "dollars" or "U.S. $" are to such coin or currency
of the United States of America as at the time shall be legal tender for the
payment of public and private debts therein.






                                     A-2-4
<PAGE>

<TABLE>
<CAPTION>
                                              SCHEDULE OF EXCHANGES FOR GLOBAL NOTES

     The following exchanges of a part of this Regulation S Temporary Global Note for other Global Notes have been made:
<S>                  <C>                     <C>                     <C>                        <C>
                                                                        Principal Amount of          Signature of
                      Amount of decrease in   Amount of increase in       this Global Note       authorized officer of
                        Principal Amount        Principal Amount      following such decrease       Trustee or Note
Date of Exchange       of this Global Note     of this Global Note         (or increase)               Custodian
- ----------------      --------------------    --------------------    -----------------------    ---------------------

</TABLE>






                                     A-2-5
<PAGE>

                                                                     EXHIBIT B-1


         FORM OF CERTIFICATE FOR EXCHANGE OR REGISTRATION OF TRANSFER
               FROM 144A GLOBAL NOTE TO REGULATION S GLOBAL NOTE
               (Pursuant to Section 2.06(a)(i) of the Indenture)

Chase Bank of Texas, National Association,
as Trustee and Registrar


     Re:  11 3/4% Senior Notes due 2009 of Frontier Oil Corporation
          ---------------------------------------------------------

     Reference is hereby made to the Indenture, dated as of November 12, 1999
(the "Indenture"), between Frontier Oil Corporation (the "Company") and Chase
Bank of Texas, National Association, as trustee (the "Trustee").  Capitalized
terms used but not defined herein shall have the meanings given to them in the
Indenture.

     This letter relates to $ _______________ principal amount of Notes which
are evidenced by one or more 144A Global Notes and held with the Depository in
the name of_____________ (the "Transferor").  The Transferor has requested a
transfer of such beneficial interest in the Notes to a Person who will take
delivery thereof in the form of an equal principal amount of Notes evidenced by
one or more Regulation S Global Notes, which amount, immediately after such
transfer, is to be held with the Depository through Euroclear or Cedel or both.

     In connection with such request and in respect of such Notes, the
Transferor hereby certifies that such transfer has been effected in compliance
with the transfer restrictions applicable to the Global Notes and pursuant to
and in accordance with Rule 903 or Rule 904 under the United States Securities
Act of 1933, as amended (the "Securities Act"), and accordingly the Transferor
hereby further certifies that:

          (1) The offer of the Notes was not made to a person in the United
     States;

          (2) either:

              (a) at the time the buy order was originated, the transferee was
          outside the United States or the Transferor and any person acting on
          its behalf reasonably believed and believes that the transferee was
          outside the United States; or

              (b) the transaction was executed in, on or through the facilities
          of a designated offshore securities market and neither the Transferor
          nor any person acting on its behalf knows that the transaction was
          prearranged with a buyer in the United States;

          (3) no directed selling efforts have been made in contravention of the
     requirements of Rule 904(b) of Regulation S;
<PAGE>

          (4) the transaction is not part of a plan or scheme to evade the
     registration provisions of the Securities Act; and

          (5) upon completion of the transaction, the beneficial interest being
     transferred as described above is to be held with the Depository through
     Euroclear or Cedel or both.

     Upon giving effect to this request to exchange a beneficial interest in a
144A Global Note for a beneficial interest in a Regulation S Global Note, the
resulting beneficial interest shall be subject to the restrictions on transfer
applicable to Regulation S Global Notes pursuant to the Indenture and the
Securities Act and, if such transfer occurs prior to the end of the 40-day
restricted period associated with the initial offering of Notes, the additional
restrictions applicable to transfers of interests in the Regulation S Temporary
Global Note.

     This certificate and the statements contained herein are made for your
benefit and the benefit of the Company.  Terms used in this certificate and not
otherwise defined in the Indenture have the meanings set forth in Regulation S
under the Securities Act.

                                    [Insert Name of Transferor]


                                    By__________________________________
                                      Name:
                                      Title:

Dated:

cc:  Frontier Oil Corporation





                                     B-1-2
<PAGE>

                                                                     EXHIBIT B-2


         FORM OF CERTIFICATE FOR EXCHANGE OR REGISTRATION OF TRANSFER
               FROM REGULATION S GLOBAL NOTE TO 144A GLOBAL NOTE
              (Pursuant to Section 2.06(a)(ii) of the Indenture)


Chase Bank of Texas, National Association,
   as Trustee and Registrar


     Re:  11 3/4% Senior Notes due 2009 of Frontier Oil Corporation
          ---------------------------------------------------------

     Reference is hereby made to the Indenture dated as of November 12, 1999
(the "Indenture") between Frontier Oil Corporation (the "Company") and Chase
Bank of Texas, National Association, as trustee (the "Trustee").  Capitalized
terms used but not defined herein shall have the meanings given to them in the
Indenture.

     This letter relates to $_________ principal amount of Notes which are
evidenced by one or more Regulation S Global Notes and held with the Depository
through Euroclear or Cedel in the name of ________ (the "Transferor").  The
Transferor has requested a transfer of such beneficial interest in the Notes to
a Person who will take delivery thereof in the form of an equal principal amount
of Notes evidenced by one or more 144A Global Notes, to be held with the
Depository.

     In connection with such request and in respect of such Notes, the
Transferor hereby certifies that:

                                  [CHECK ONE]

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

                                      or

[_]  such transfer is being effected pursuant to and in accordance with Rule 144
     under the Securities Act;

                                      or

[_]  such transfer is being effected pursuant to an exemption from the
     registration requirements of the Securities Act other than one described
     above, and the Transferor hereby further certifies that the Notes are being
     transferred in compliance with the transfer restrictions applicable to the
<PAGE>

     Global Notes and in accordance with the requirements of the exemption
     claimed, which certification is supported by an Opinion of Counsel,
     provided by the transferor or the transferee (a copy of which the
     Transferor has attached to this certification) in form reasonably
     acceptable to the Company and to the Registrar, to the effect that such
     transfer is in compliance with the Securities Act and any applicable blue
     sky laws of any state of the United States;

                                      or

[_]  such transfer is being effected pursuant to an effective registration
     statement under the Securities Act;

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

     Upon giving effect to this request to exchange a beneficial interest in
Regulation S Global Notes for a beneficial interest in 144A Global Notes, the
resulting beneficial interest shall be subject to the restrictions on transfer
applicable to 144A Global Notes pursuant to the Indenture and the Securities
Act.

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

                                    [Insert Name of Transferor]


                                    By__________________________________
                                      Name:
                                      Title:
Dated:

cc:  Frontier Oil Corporation





                                     B-2-2
<PAGE>

                                                                     EXHIBIT B-3

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


Chase Bank of Texas, National Association,
  as Trustee and Registrar


     Re:  11 3/4% Senior Notes due 2009 of Frontier Oil Corporation
          ---------------------------------------------------------

     Reference is hereby made to the Indenture dated as of November 12, 1999
(the "Indenture") between Frontier Oil Corporation (the "Company") and Chase
Bank of Texas, National Association, as trustee (the "Trustee").  Capitalized
terms used but not defined herein shall have the meanings given to them in the
Indenture.

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

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

                                  [CHECK ONE]

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

                                      or

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

                                      or

[_]  the Surrendered Notes are being transferred pursuant to and in accordance
     with Rule 144A under the United States Securities Act of 1933, as amended
     (the "Securities Act"), and, accordingly, the Transferor hereby further
     certifies that the Surrendered Notes are being transferred to a Person that
     the Transferor reasonably believes is purchasing the Surrendered Notes for
     its own account, or for one or more accounts with respect to which such
     Person exercises sole investment discretion, and such Person and each such
     account is a "qualified institutional buyer" within the meaning of Rule
     144A, in each case in a transaction meeting the requirements of Rule 144A;
<PAGE>

                                      or

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

                                      or

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

                                      or

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

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

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

                                    [Insert Name of Transferor]


                                    By__________________________________
                                      Name:
                                      Title:

Dated:

cc:  Frontier Oil Corporation



                                     B-3-2
<PAGE>

                                                                     EXHIBIT B-4


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

Chase Bank of Texas, National Association,
  as Trustee and Registrar


     Re:  11 3/4% Senior Notes due 2009 of Frontier Oil Corporation
          ---------------------------------------------------------

     Reference is hereby made to the Indenture dated as of November 12, 1999
(the "Indenture") between Frontier Oil Corporation (the "Company") and Chase
Bank of Texas, National Association, as trustee (the "Trustee").  Capitalized
terms used but not defined herein shall have the meanings given to them in the
Indenture.

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

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

                                  [CHECK ONE]

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

                                      or

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

                                      or

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

     institutional buyer" within the meaning of Rule 144A, in each case in a
     transaction meeting they requirements of Rule 144A;

                                      or

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

                                      or

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

                                      or

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

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






                                     B-4-2
<PAGE>

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

                                    [Insert Name of Transferor]


                                    By__________________________________
                                      Name:
                                      Title:

Dated:

cc:  Frontier Oil Corporation








                                     B-4-3
<PAGE>

                                                                       EXHIBIT C


                    FORM OF CERTIFICATE TO BE DELIVERED BY
                      INSTITUTIONAL ACCREDITED INVESTORS

                                                                __________, ____

Chase Bank of Texas, National Association,
  as Trustee and Registrar


Ladies and Gentlemen:

     We are delivering this letter in connection with an offering of a series of
11 3/4% Senior Notes due 2009 (the "Notes") of Frontier Oil Corporation, a
Wyoming corporation (the "Company"), all as described in the offering memorandum
(the "Offering Memorandum") relating to the offering of the Notes.  We hereby
confirm that:

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

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

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

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

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

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

     We understand that the Notes were offered in a transaction not involving
any public offering within the meaning of the Securities Act and that the Notes
have not been registered under the Securities Act, and we agree, on our own
behalf and on behalf of each account for which we acquire any Notes, that such
Notes may be offered, resold, pledged or otherwise transferred only (i) to a
person whom we reasonably believe to be a qualified institutional buyer (as
defined in Rule 144A under the Securities Act) in a transaction meeting the
requirements of Rule 144A under the Securities Act, in a transaction meeting the
requirements of Rule 144 under the Securities Act, outside the United States in
a transaction meeting the requirements of Rule 904 under the Securities Act, or
in accordance with another exemption from the registration requirements of the
Securities Act (and based upon an opinion of counsel if the Company so
requests), (ii) to the Company or (iii) pursuant to an effective registration
statement, and in each case, in accordance with any applicable securities laws
of any State of the United States or any other applicable jurisdiction, and we
will, and each subsequent holder of the Notes is required to, notify any
subsequent purchaser from us or it of the resale restrictions set forth in
clause (i) above.  We acknowledge that the Notes will bear legends substantially
to the effect set forth in the Offering Memorandum under the "Notice to
Investors." We understand that the registrar will not be required to accept for
registration of transfer any Notes, except upon presentation of evidence
satisfactory to the Company that the foregoing restrictions on transfer have
been complied with.

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

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


                                    ____________________________________
                                    [Name of Purchaser]


                                    By__________________________________
                                      Name:
                                      Title:
                                      Address:








                                      C-2
<PAGE>

                                                                       EXHIBIT D


                             SUBSIDIARY GUARANTEE

     Subject to Section 10.06 of the Indenture, each Guarantor has jointly and
severally unconditionally guaranteed to each Holder of a Note authenticated and
delivered by the Trustee and to the Trustee and its successors and assigns,
irrespective of the validity and enforceability of the Indenture, the Notes and
the Obligations of the Company under the Notes or under the Indenture, that: (a)
the principal of, premium, if any, interest and Liquidated Damages, if any, on
the Notes will be promptly paid in full when due, subject to any applicable
grace period, whether at maturity, by acceleration, redemption or otherwise, and
interest on overdue principal, premium, if any, (to the extent permitted by law)
interest on any interest, if any, and Liquidated Damages, if any, on the Notes
and all other payment Obligations of the Company to the Holders or the Trustee
under the Indenture or under the Notes will be promptly paid in full and
performed, all in accordance with the terms thereof; and (b) in case of any
extension of time of payment or renewal of any Notes or any of such other
payment Obligations, the same will be promptly paid in full when due or
performed in accordance with the terms of the extension or renewal, subject to
any applicable grace period, whether at stated maturity, by acceleration,
redemption or otherwise.  Failing payment when so due of any amount so
guaranteed or any performance so guaranteed for whatever reason, the Guarantors
will be jointly and severally obligated to pay the same immediately.  An Event
of Default under the Indenture or the Notes shall constitute an event of default
under the Subsidiary Guarantees, and shall entitle the Holders to accelerate the
obligations of the Guarantors under the Indenture in the same manner and to the
same extent as the Obligations of the Company.  The Guarantors have agreed that
their obligations under the Indenture shall be unconditional, irrespective of
the validity, regularity or enforceability of the Notes or the Indenture, the
absence of any action to enforce the same, any waiver or consent by any Holder
with respect to any provisions hereof or thereof, the recovery of any judgment
against the Company, any action to enforce the same or any other circumstance
which might otherwise constitute a legal or equitable discharge or defense of a
Guarantor.  Each Guarantor further, to the extent permitted by law, has waived
diligence, presentment, demand of payment, filing of claims with a court in the
event of insolvency or bankruptcy of the Company, any right to require a
proceeding first against the Company, protest, notice and all demands whatsoever
and covenants that its Subsidiary Guarantee will not be discharged except by
complete performance of the Obligations contained in the Notes and the
Indenture.  If any Holder or the Trustee is required by any court or otherwise
to return to the Company, the Guarantors, or any Note Custodian, Trustee,
liquidator or other similar official acting in relation to either the Company or
the Guarantors, any amount paid by the Company or any Guarantor to the Trustee
or such Holder, its Subsidiary Guarantees, to the extent theretofore discharged,
shall be reinstated in full force and effect.  Each Guarantor agrees that it
shall not be entitled to, and hereby waives, any right of subrogation in
relation to the Holders in respect of any Obligations guaranteed under the
Indenture.  Each Guarantor further has agreed that, as between the Guarantors,
on the one hand, and the Holders and the Trustee, on the other hand, (a) the
maturity of the Obligations guaranteed under the Indenture may be accelerated as
provided in Article 6 of the Indenture for the purposes of its Subsidiary
Guarantee, notwithstanding any stay, injunction or other prohibition preventing
such acceleration in respect of the Obligations guaranteed thereby, and (b) in
the event of any declaration of acceleration of such Obligations as provided in
Article 6 of the Indenture, such Obligations (whether or not due and payable)
shall forthwith become due and payable by the Guarantor for the purpose of its
Subsidiary Guarantee.  The Guarantors shall have the right to seek contribution
from any non-paying Guarantor
<PAGE>

so long as the exercise of such right does not impair the rights of the Holders
under the Subsidiary Guarantees.

     The obligations of the Guarantors to the Holders and to the Trustee
pursuant to the Subsidiary Guarantees and the Indenture are expressly set forth
in Article 10 of the Indenture, and reference is hereby made to such Indenture
for the precise terms of the Subsidiary Guarantees.  The terms of Article 10 of
the Indenture are incorporated herein by reference.  The Subsidiary Guarantees
are subject to release as and to the extent provided in Sections 10.04 and 10.05
of the Indenture.

     Each Subsidiary Guarantee is a continuing guarantee and shall remain in
full force and effect and shall be binding upon each Guarantor and its
respective successors and assigns to the extent set forth in the Indenture until
full and final payment of all of the Company's Obligations under the Notes and
the Indenture and shall inure to the benefit of the successors and assigns of
the Trustee and the Holders and, in the event of any transfer or assignment of
rights by any Holder or the Trustee, the rights and privileges conferred in the
Indenture upon that party shall automatically extend to and be vested in such
transferee or assignee, all subject to the terms and conditions hereof. Each
Subsidiary Guarantee is a guarantee of payment and not a guarantee of
collection.

     The Subsidiary Guarantees shall not be valid or obligatory for any purpose
until the certificate of authentication on the Note upon which this notation of
Subsidiary Guarantee is endorsed shall have been executed by the Trustee or an
authenticating agent under the Indenture by the manual signature of one of its
authorized signatories.

     For purposes hereof, each Guarantor's liability under its Subsidiary
Guarantee shall be limited to the lesser of (i) the aggregate amount of the
Obligations of the Company under the Notes and the Indenture and (ii) the
amount, if any, which would not have (A) rendered such Guarantor "insolvent" (as
such term is defined in the Bankruptcy Law and in the Debtor and Creditor Law of
the State of New York) or (B) left such Guarantor with unreasonably small
capital at the time its Subsidiary Guarantee of the Notes was entered into;
provided that, it will be a presumption in any lawsuit or other proceeding in
which a Guarantor is a party that the amount guaranteed pursuant to the
Subsidiary Guarantee is the amount set forth in clause (i) above unless any
creditor, or representative of creditors of such Guarantor, or debtor in
possession or trustee in bankruptcy of such Guarantor, otherwise proves in such
a lawsuit that the aggregate liability of the Guarantor is limited to the amount
set forth in clause (ii) above.  The Indenture provides that, in making any
determination as to the solvency or sufficiency of capital of a Guarantor in
accordance with the previous sentence, the right of such Guarantors to
contribution from other Guarantors and any other rights such Guarantors may
have, contractual or otherwise, shall be taken into account.



                                      D-2
<PAGE>

     Capitalized terms used herein have the same meanings given in the Indenture
unless otherwise indicated.

                                    [GUARANTORS]


                                    By__________________________________
                                      Name:
                                      Title:



















                                      D-3
<PAGE>

                                                                       EXHIBIT E

================================================================================



                           FRONTIER OIL CORPORATION



                              ___________________

                         11 3/4% SENIOR NOTES DUE 2009

                              ___________________



                        FORM OF SUPPLEMENTAL INDENTURE
                     AND AMENDMENT -- SUBSIDIARY GUARANTEE


                         DATED AS OF ___________, ____



                              ___________________


                   CHASE BANK OF TEXAS, NATIONAL ASSOCIATION

                                    Trustee

                              ___________________


================================================================================
<PAGE>

     This SUPPLEMENTAL INDENTURE, dated as of ____________, ____, is among
Frontier Oil Corporation, a Wyoming corporation (the "Company"), each of the
parties identified under the caption "Guarantors" on the signature page hereto
(the "Guarantors") and Chase Bank of Texas, National Association, as Trustee
(the "Trustee").

                                   RECITALS

     WHEREAS, the Company and the Trustee entered into an Indenture, dated as of
November 12, 1999 (the "Indenture"), pursuant to which the Company has
originally issued one or more series of 11 3/4% Senior Notes due 2009 (the
"Notes"); and

     WHEREAS, Section 9.01(f) of the Indenture provides that the Company and the
Trustee may amend or supplement the Indenture in order to execute and deliver a
guarantee (a "Subsidiary Guarantee") to comply with Section 10.02 thereof
without the consent of the Holders of the Notes; and

     WHEREAS, all acts and things prescribed by the Indenture, by law and by the
Certificate of Incorporation and the Bylaws or comparable constituent documents
of the Company, of the Guarantors and of the Trustee necessary to make this
Supplemental Indenture a valid instrument legally binding on the Company, the
Guarantors and the Trustee, in accordance with its terms, have been duly done
and performed;

     NOW, THEREFORE, to comply with the provisions of the Indenture and in
consideration of the above premises, the Company, the Guarantors and the Trustee
covenant and agree for the equal and proportionate benefit of the respective
Holders of the Notes as follows:

                                   ARTICLE 1

     Section 1.01.  This Supplemental Indenture is supplemental to the Indenture
and does and shall be deemed to form a part of, and shall be construed in
connection with and as part of, the Indenture for any and all purposes.

     Section 1.02.  This Supplemental Indenture shall become effective
immediately upon its execution and delivery by each of the Company, the
Guarantors and the Trustee.

                                   ARTICLE 2

     From this date, in accordance with Section 10.02 and by executing this
Supplemental Indenture and the accompanying notation of Subsidiary Guarantee (a
copy of which is attached hereto), the Guarantors whose signatures appear below
are subject to the provisions of the Indenture to the extent provided for in
Article 10 thereunder.


                                      E-1
<PAGE>

                                   ARTICLE 3

     Section 3.01.  Except as specifically modified herein, the Indenture and
the Notes are in all respects ratified and confirmed (mutatis mutandis) and
shall remain in full force and effect in accordance with their terms with all
capitalized terms used herein without definition having the same respective
meanings ascribed to them as in the Indenture.

     Section 3.02.  Except as otherwise expressly provided herein, no duties,
responsibilities or liabilities are assumed, or shall be construed to be
assumed, by the Trustee by reason of this Supplemental Indenture.  This
Supplemental Indenture is executed and accepted by the Trustee subject to all
the terms and conditions set forth in the Indenture with the same force and
effect as if those terms and conditions were repeated at length herein and made
applicable to the Trustee with respect hereto.

     Section 3.03.  THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE AND ENFORCE THIS SUPPLEMENTAL INDENTURE.

     Section 3.04.  The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of such
executed copies together shall represent the same agreement.

                         [NEXT PAGE IS SIGNATURE PAGE]










                                      E-2
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed, all as of the date first written above.

                                    FRONTIER OIL CORPORATION



                                    By__________________________________
                                      Name:
                                      Title:



                                    GUARANTORS

                                    [_________________]



                                    By__________________________________
                                      Name:
                                      Title:



                                    CHASE BANK OF TEXAS,
                                      NATIONAL ASSOCIATION, as Trustee



                                    By__________________________________
                                      Name:
                                      Title:



                                      E-3


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