EXHIBIT 99.2



                            364-DAY CREDIT AGREEMENT





                                   dated as of




                                September 28, 2004


                                      among



                       PIONEER NATURAL RESOURCES COMPANY,


                                 as the Borrower



                              JPMORGAN CHASE BANK,
                             as Administrative Agent


                                       and
                            The Lenders Party Hereto


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


           BANK OF AMERICA, N.A., BARCLAYS BANK PLC, WELLS FARGO BANK,
         NATIONAL ASSOCIATION, and WACHOVIA BANK, NATIONAL ASSOCIATION,
                             Co-Documentation Agent



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


                          J.P. MORGAN SECURITIES INC.,
                      as Lead Arranger and Sole Bookrunner









                                TABLE OF CONTENTS


                                                                        Page:
                                                                        ----

ARTICLE I Definitions......................................................1


         Section 1.01      Defined Terms...................................1
         Section 1.02      Classification of Loans and Borrowings.........15
         Section 1.03      Terms Generally................................15
         Section 1.04      Accounting Terms; GAAP.........................15

ARTICLE II The Credits....................................................16

         Section 2.01      Commitments....................................16
         Section 2.02      Conversion to Term Loans.......................16
         Section 2.03      Revolving Loans and Borrowings.................16
         Section 2.04      Requests for Revolving Borrowings..............17
         Section 2.05      Intentionally Omitted..........................17
         Section 2.06      Intentionally Omitted..........................17
         Section 2.07      Funding of Borrowings..........................18
         Section 2.08      Interest Elections.............................18
         Section 2.09      Termination and Reduction of Commitments.......19
         Section 2.10      Repayment of Loans; Evidence of Debt...........20
         Section 2.11      Prepayment of Loans............................21
         Section 2.12      Fees...........................................21
         Section 2.13      Interest.......................................22
         Section 2.14      Alternate Rate of Interest.....................22
         Section 2.15      Increased Costs................................23
         Section 2.16      Break Funding Payments.........................24
         Section 2.17      Taxes..........................................24
         Section 2.18      Payments Generally; Pro Rata Treatment;
                           Sharing of Set-offs............................26
         Section 2.19      Mitigation Obligations; Replacement
                           of Lenders.....................................27

ARTICLE III Representations and Warranties................................28

         Section 3.01      Organization; Powers...........................28
         Section 3.02      Authorization; Enforceability..................28
         Section 3.03      Governmental Approvals; No Conflicts...........28
         Section 3.04      Financial Condition; No Material
                           Adverse Change.................................28
         Section 3.05      Properties.....................................29
         Section 3.06      Litigation and Environmental Matters...........29
         Section 3.07      Compliance with Laws...........................29
         Section 3.08      Investment and Holding Company Status..........29
         Section 3.09      Taxes..........................................29
         Section 3.10      ERISA..........................................30
         Section 3.11      Disclosure.....................................30
         Section 3.12      Subsidiary Guarantees..........................30

ARTICLE IV Conditions.....................................................30

         Section 4.01      Effective Date.................................30
         Section 4.02      Each Credit Event..............................31


                                       i
                            364-DAY CREDIT AGREEMENT





ARTICLE V Affirmative Covenants...........................................31

         Section 5.01      Financial Statements and Other Information.....31
         Section 5.02      Notices of Material Events.....................33
         Section 5.03      Existence; Conduct of Business.................33
         Section 5.04      Payment of Obligations.........................33
         Section 5.05      Maintenance of Properties; Insurance...........33
         Section 5.06      Books and Records; Inspection Rights...........34
         Section 5.07      Compliance with Laws...........................34
         Section 5.08      Use of Proceeds................................34
         Section 5.09      Operations.....................................34

ARTICLE VI Negative Covenants.............................................34

         Section 6.01      Indebtedness...................................34
         Section 6.02      Liens..........................................35
         Section 6.03      Fundamental Changes............................36
         Section 6.04      Financial Covenants............................36
         Section 6.05      Investments, Loans, Advances, Guarantees
                           and Acquisitions...............................36
         Section 6.06      Swap Agreements................................37
         Section 6.07      Transactions with Affiliates...................37
         Section 6.08      Restrictive Agreements.........................37

ARTICLE VII Events of Default.............................................37

ARTICLE VIII The Administrative Agent.....................................40

         Section 8.01      Administrative Agent...........................40
         Section 8.02      The Lead Arranger, Sole Bookrunner, and
                           Co-Documentation Agents........................42

ARTICLE IX Miscellaneous..................................................42

         Section 9.01      Notices........................................42
         Section 9.02      Waivers; Amendments............................43
         Section 9.03      Expenses; Indemnity; Damage Waiver.............43
         Section 9.04      Successors and Assigns.........................44
         Section 9.05      Survival.......................................47
         Section 9.06      Counterparts; Integration; Effectiveness.......48
         Section 9.07      Severability...................................48
         Section 9.08      Governing Law; Jurisdiction; Consent to
                           Service of Process.............................48
         SECTION 9.09      WAIVER OF JURY TRIAL...........................49
         Section 9.10      Headings.......................................49
         Section 9.11      Confidentiality................................49
         Section 9.12      Interest Rate Limitation.......................50
         Section 9.13      USA Patriot Act Notice.........................51

Schedules:
- ---------
Schedule 2.01     Commitments
Schedule 3.06     Disclosed Matters
Schedule 6.02     Liens
Schedule 6.08     Existing Restrictive Agreements


                                       ii
                            364-DAY CREDIT AGREEMENT






Exhibits:
- --------
Exhibit A         Form of Assignment and Assumption
Exhibit B         Form of Opinion of Borrower's Counsel
Exhibit C         Form of Subsidiary Guaranty
Exhibit D         Form of Promissory Note







                                      iii
                            364-DAY CREDIT AGREEMENT






     364-DAY  CREDIT  AGREEMENT  dated as of September 28,  2004,  among PIONEER
NATURAL RESOURCES COMPANY,  a Delaware  corporation,  as the Borrower,  JPMORGAN
CHASE BANK, as Administrative  Agent, the LENDERS party hereto, BANK OF AMERICA,
N.A.,  BARCLAYS BANK PLC, WELLS FARGO BANK, NATIONAL  ASSOCIATION,  AND WACHOVIA
BANK,  NATIONAL  ASSOCIATION,  as Lender and  Co-Documentation  Agents, and J.P.
MORGAN SECURITIES INC., as Lead Arranger and Sole Bookrunner.

     The parties hereto agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

     Section 1.01 Defined Terms. As used in this Agreement,  the following terms
have the meanings specified below:

     "ABR",  when used in reference to any Loan or Borrowing,  refers to whether
such Loan, or the Loans  comprising  such Borrowing,  are bearing  interest at a
rate determined by reference to the Alternate Base Rate.

     "Adjusted LIBO Rate" means,  with respect to any  Eurodollar  Borrowing for
any Interest Period, an interest rate per annum (rounded upwards,  if necessary,
to the next  1/16 of 1%)  equal to (a) the LIBO  Rate for such  Interest  Period
multiplied by (b) the Statutory Reserve Rate.

     "Administrative  Agent"  means  JPMorgan  Chase  Bank,  in its  capacity as
administrative agent for the Lenders hereunder.

     "Administrative  Questionnaire" means an Administrative  Questionnaire in a
form supplied by the Administrative Agent.

     "Affiliate" means, with respect to a specified Person,  another Person that
directly,  or  indirectly  through  one or more  intermediaries,  Controls or is
Controlled by or is under common Control with the Person specified.

     "Agreement"  means  this  364-Day  Credit  Agreement,  as the  same  may be
amended, modified, restated, or replaced from time to time.

     "Alternate  Base Rate"  means,  for any day, a rate per annum  equal to the
greater  of (a) the Prime Rate in effect on such day and (b) the  Federal  Funds
Effective Rate in effect on such day plus 1/2 of 1%. Any change in the Alternate
Base Rate due to a change in the Prime Rate or the Federal Funds  Effective Rate
shall be effective  from and including the effective  date of such change in the
Prime Rate or the Federal Funds Effective Rate, respectively.

     "Applicable  Percentage"  means, with respect to any Lender, the percentage
of the Commitments  represented by such Lender's Commitment.  If the Commitments
have terminated or expired, the Applicable Percentages shall be determined based
upon the Commitments most recently in effect, giving effect to any assignments.


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                            364-DAY CREDIT AGREEMENT






     "Applicable  Margin"  means,  for any day,  with respect to any  Eurodollar
Loan, or with respect to the commitment fees payable hereunder,  as the case may
be,  the  Applicable  Margin  per  annum  set  forth  below  under  the  caption
"Eurodollar Spread" or "Commitment Fee Rate", as the case may be, based upon the
ratings by Moody's and S&P,  respectively,  applicable on such date to the Index
Debt:



       ====================  =====================  ===================
        Index Debt Ratings    Commitment Fee Rate    Eurodollar Spread
       --------------------  ---------------------  -------------------
                                           
            Category 1              0.25 %                0.75 %
            >=Baa3/BBB-
       --------------------  ---------------------  -------------------
            Category 2              0.30 %                1.00 %
            <Baa3/BBB-
       ====================  =====================  ===================


     Applicable Margin for ABR Loans is zero percent (0%).

     For  purposes of the  foregoing,  if both Moody's and S&P shall not have in
effect a rating for the Index Debt  (other  than by reason of the  circumstances
referred to in the last sentence of this  definition),  then such agencies shall
be deemed to have established a rating in Category 2. If the ratings established
or deemed to have been  established  by Moody's and S&P for the Index Debt shall
fall within different  Categories,  the Applicable  Margin shall be based on the
higher of the two ratings; provided, however, that if only one of Moody's or S&P
shall have established a rating,  then the Applicable Margin shall be determined
by reference to such available rating.  If the ratings  established or deemed to
have been  established  by  Moody's  and S&P for the Index Debt shall be changed
(other  than as a result of a change in the  rating  system of  Moody's or S&P),
such change shall be effective as of the date on which it is first  announced by
the applicable  rating agency,  irrespective of when notice of such change shall
have been  furnished  by the  Borrower to the Agent and the Lenders  pursuant to
Section  5.01 or  otherwise.  Each change in the  Applicable  Margin shall apply
during the period  commencing on the effective date of such change and ending on
the date  immediately  preceding the effective date of the next such change.  If
the rating  system of  Moody's or S&P shall  change,  or if either  such  rating
agency shall cease to be in the business of rating  corporate debt  obligations,
the  Borrower  and the  Lenders  shall  negotiate  in good  faith to amend  this
definition  to reflect  such  changed  rating  system or the  unavailability  of
ratings  from such rating  agency and,  pending  the  effectiveness  of any such
amendment,  the Applicable Margin shall be determined by reference to the rating
of such agency most recently in effect prior to such change or cessation.

     After  the  Revolving  Commitment  Termination  Date and  until  the  Final
Maturity Date, the Eurodollar Spread shall be as set forth above plus 0.25%.

     "Approved Fund" has the meaning assigned to such term in Section 9.04.

     "Assignment and Assumption" means an assignment and assumption entered into
by a Lender and an  assignee  (with the  consent of any party  whose  consent is
required by Section 9.04), and accepted by the Administrative Agent, in the form
of Exhibit A or any other form approved by the Administrative Agent.


                                       2
                            364-DAY CREDIT AGREEMENT






     "Availability  Period"  means the period from and  including  the Effective
Date to but excluding the earlier of the Revolving  Commitment  Termination Date
and the date of termination of the Commitments.

     "Board" means the Board of Governors of the Federal  Reserve  System of the
United States of America.

     "Borrower" means Pioneer Natural Resources Company, a Delaware corporation.

     "Borrowing"  means Loans of the same Type, made,  converted or continued on
the  same  date  and,  in the  case of  Eurodollar  Loans,  as to which a single
Interest Period is in effect.

     "Borrowing  Request"  means  a  request  by the  Borrower  for a  Revolving
Borrowing in accordance with Section 2.04.

     "Business Day" means any day that is not a Saturday, Sunday or other day on
which  commercial  banks in New York City or Texas are authorized or required by
law to remain closed;  provided that,  when used in connection with a Eurodollar
Loan,  the term "Business Day" shall also exclude any day on which banks are not
open for dealings in dollar deposits in the London interbank market.

     "Capital  Lease  Obligations"  of any Person means the  obligations of such
Person to pay rent or other  amounts  under  any lease of (or other  arrangement
conveying the right to use) real or personal property, or a combination thereof,
which  obligations  are required to be  classified  and accounted for as capital
leases on a balance  sheet of such  Person  under  GAAP,  and the amount of such
obligations  shall be the  capitalized  amount thereof  determined in accordance
with GAAP.

     "Certifying Officer" has the meaning set forth in Section 5.01(c).

     "Change in Control"  means (a) the  acquisition  of ownership,  directly or
indirectly,  beneficially  or of  record,  by any  Person or group  (within  the
meaning of the  Securities  Exchange Act of 1934 and the rules of the Securities
and Exchange  Commission  thereunder as in effect on the date hereof), of Equity
Interests  representing  more than 35% of the  aggregate  ordinary  voting power
represented by the issued and outstanding  Equity Interests of the Borrower;  or
(b) occupation of a majority of the seats (other than vacant seats) on the board
of directors  of the  Borrower by Persons who were neither (i)  nominated by the
board of directors of the Borrower nor (ii) appointed by directors so nominated.

     "Change in Law" means (a) the adoption of any law, rule or regulation after
the date of this Agreement,  (b) any change in any law, rule or regulation or in
the  interpretation or application  thereof by any Governmental  Authority after
the date of this  Agreement or (c) compliance by any Lender (or, for purposes of
Section  2.15(b),  by any  lending  office of such  Lender  or by such  Lender's
holding companies, if any) with any request,  guideline or directive (whether or
not having the force of law) of any Governmental  Authority made or issued after
the date of this Agreement.


                                       3
                            364-DAY CREDIT AGREEMENT






     "Class", when used in reference to any Loan or Borrowing, refers to whether
such Loan, or the Loans  comprising such Borrowing,  are Revolving Loans or Term
Loans.

     "Code"  means the Internal  Revenue  Code of 1986,  as amended from time to
time.

     "Commitment"  means,  with respect to each Lender,  the  commitment of such
Lender to make Revolving Loans and to convert the Revolving Loans outstanding on
the Revolving Commitment  Termination Date to Term Loans, expressed as an amount
representing  the maximum  aggregate  amount of such  Lender's  Credit  Exposure
hereunder,  as such  commitment may be (a) reduced from time to time pursuant to
Section  2.09,  or (b)  reduced  or  increased  from  time to time  pursuant  to
assignments by or to such Lender pursuant to Section 9.04. The initial amount of
each Lender's Commitment is set forth on Schedule 2.01, or in the Assignment and
Assumption  pursuant to which such Lender shall have assumed its Commitment,  as
applicable.  The  initial  aggregate  amount  of  the  Lenders'  Commitments  is
$900,000,000.

     "Consolidated  EBITDAX"  means,  with  respect  to  the  Borrower  and  its
Restricted  Subsidiaries,  for any  period,  Consolidated  Net  Income  for that
period,  plus (a) to the extent included in determining  Consolidated Net Income
for that period,  (i) the aggregate amount of Consolidated  Interest Expense for
that period, (ii) the aggregate amount of letter of credit fees paid during that
period,  (iii) the aggregate amount of income tax expense for that period,  (iv)
non-cash  extraordinary  losses,  (v) losses on the disposition of assets,  (vi)
losses or charges under Statement of Financial Accounting Standards 133 (and any
statements  replacing,  modifying or superceding such statement)  resulting from
the net change in the Borrower's (or any Restricted Subsidiary's) mark-to-market
portfolio of commodity  price risk  management  activities and (vii) all amounts
attributable  to  depreciation,  depletion,  amortization,  and  other  non-cash
charges and  expenses  for that period and (viii)  exploration  and  abandonment
expenses,  minus (b) to the extent  included  in  determining  Consolidated  Net
Income for that  period,  (i)  non-cash  extraordinary  income (ii) gains on the
disposition  of assets and (iii)  non-cash  gains under  Statement  of Financial
Accounting Standard 133 (and any statements replacing,  modifying or superceding
such  statement)  resulting from the net change in Borrower's (or any Restricted
Subsidiary's)  mark-to-market  portfolio  of  commodity  price  risk  management
activities during that period,  in each case determined on a consolidated  basis
in accordance with GAAP and without duplication of amounts.

     "Consolidated Interest Expense" means, with respect to the Borrower and its
Restricted  Subsidiaries on a consolidated  basis for any period, the sum of (i)
gross interest expense  (including all cash and accrued interest expense) of the
Borrower and its Restricted Subsidiaries for such period on a consolidated basis
in accordance with GAAP, including to the extent included in interest expense in
accordance with GAAP (x) the  amortization of debt discounts and (y) the portion
of any payments or accruals with respect to Capital Leases allocable to interest
expense  and  (ii)  capitalized  interest  of the  Borrower  and its  Restricted
Subsidiaries on a consolidated basis in accordance with GAAP.

     "Consolidated Net Income" means, for any period, net income of the Borrower
and its Restricted Subsidiaries determined on a consolidated basis in accordance
with GAAP.


                                       4
                            364-DAY CREDIT AGREEMENT






     "Consolidated  Tangible Net Worth" means, at any date, (i) the Consolidated
shareholders' equity of Borrower and its Restricted Subsidiaries  (determined in
accordance with GAAP); less (ii) the amount of Consolidated intangible assets of
Borrower and its Restricted  Subsidiaries,  provided, that to the extent oil and
gas mineral leases are classified as intangible  assets under GAAP, for purposes
of this definition,  those assets will be treated as tangible assets; less (iii)
the other  comprehensive  income  component of  consolidated  shareholders'  net
equity of Borrower  and its  Restricted  Subsidiaries  attributable  to deferred
hedge gains;  plus (iv) the aggregate  amount of any non-cash  write downs under
Statements of Financial  Accounting  Standards  Nos. 19, 109, 142, and 144, (and
any  statements  replacing,  modifying  or  superceding  such  statement),  on a
Consolidated  basis, by Borrower and its Restricted  Subsidiaries after December
31, 2002,  net of  associated  taxes;  plus (v) the other  comprehensive  income
component  of  consolidated   shareholders'  net  equity  of  Borrower  and  its
Restricted Subsidiaries attributable to deferred hedge losses.

     "Control"  means the  possession,  directly or indirectly,  of the power to
direct or cause the direction of the management or policies of a Person, whether
through  the  ability to  exercise  voting  power,  by  contract  or  otherwise.
"Controlling" and "Controlled" have meanings correlative thereto.

     "Credit  Exposure"  means,  with  respect  to any  Lender at any time,  the
outstanding principal amount of such Lender's Loans at such time.

     "Default"  means  any  event or  condition  which  constitutes  an Event of
Default or which  upon  notice,  lapse of time or both  would,  unless  cured or
waived, become an Event of Default.

     "Disclosed  Matters"  means  the  actions,  suits and  proceedings  and the
environmental matters disclosed in Schedule 3.06.

     "dollars" or "$" refers to lawful money of the United States of America.

     "Effective  Date" means the date, on or before  December 31, 2004, on which
the conditions  specified in Section 4.01 are satisfied (or waived in accordance
with Section 9.02).

     "Environmental Laws" means all laws, rules, regulations, codes, ordinances,
orders, decrees, judgments,  injunctions,  notices or binding agreements issued,
promulgated or entered into by any Governmental  Authority,  relating in any way
to the  environment,  preservation  or  reclamation  of natural  resources,  the
management, release or threatened release of any Hazardous Material.

     "Environmental  Liability"  means any  liability,  contingent  or otherwise
(including any liability for damages, costs of environmental remediation, fines,
penalties  or  indemnities),  of the  Borrower  or any  Subsidiary  directly  or
indirectly  resulting from or based upon (a) violation of any Environmental Law,
(b)  the  generation,  use,  handling,  transportation,  storage,  treatment  or
disposal of any Hazardous  Materials,  (c) exposure to any Hazardous  Materials,
(d) the  release or  threatened  release  of any  Hazardous  Materials  into the
environment  or (e) any  contract,  agreement  or other  consensual  arrangement
pursuant to which  liability  is assumed or imposed  with  respect to any of the
foregoing.


                                       5
                            364-DAY CREDIT AGREEMENT






     "Equity  Interests" means shares of capital stock,  partnership  interests,
membership  interests in a limited liability company,  beneficial interests in a
trust or other equity ownership interests in a Person, and any warrants, options
or other  rights  entitling  the holder  thereof to purchase or acquire any such
equity interest.

     "ERISA"  means the Employee  Retirement  Income  Security  Act of 1974,  as
amended from time to time.

     "ERISA Affiliate" means any trade or business (whether or not incorporated)
that, together with the Borrower,  is treated as a single employer under Section
414(b) or (c) of the Code or,  solely for  purposes  of Section 302 of ERISA and
Section 412 of the Code,  is treated as a single  employer  under Section 414 of
the Code.

     "ERISA Event" means (a) any "reportable  event", as defined in Section 4043
of ERISA or the regulations issued thereunder with respect to a Plan (other than
an event for which the 30-day notice period is waived);  (b) the existence  with
respect  to any Plan of an  "accumulated  funding  deficiency"  (as  defined  in
Section 412 of the Code or Section 302 of ERISA), whether or not waived; (c) the
filing  pursuant to Section  412(d) of the Code or Section 303(d) of ERISA of an
application  for a waiver of the minimum  funding  standard  with respect to any
Plan; (d) the  incurrence by the Borrower or any of its ERISA  Affiliates of any
liability  under Title IV of ERISA with respect to the  termination of any Plan;
(e) the receipt by the Borrower or any ERISA  Affiliate  from the PBGC or a plan
administrator  of any notice  relating to an intention to terminate  any Plan or
Plans or to appoint a trustee to administer  any Plan; (f) the incurrence by the
Borrower or any of its ERISA  Affiliates  of any  liability  with respect to the
withdrawal or partial withdrawal from any Plan or Multiemployer Plan; or (g) the
receipt by the Borrower or any ERISA Affiliate of any notice,  or the receipt by
any  Multiemployer  Plan from the Borrower or any ERISA Affiliate of any notice,
concerning  the  imposition of Withdrawal  Liability or a  determination  that a
Multiemployer  Plan is, or is expected to be,  insolvent  or in  reorganization,
within the meaning of Title IV of ERISA.

     "Eurodollar",  when used in reference to any Loan or  Borrowing,  refers to
whether such Loan, or the Loans comprising such Borrowing,  are bearing interest
at a rate determined by reference to the Adjusted LIBO Rate.

     "Event of Default" has the meaning set forth in Article VII.

     "Excluded  Taxes"  means,  with respect to the  Administrative  Agent,  any
Lender or any other  recipient of any payment to be made by or on account of any
obligation  of the  Borrower  hereunder,  (a) income or  franchise  taxes by the
United States of America,  or by the  jurisdiction  under the laws of which such
recipient is organized  or in which its  principal  office is located or, in the
case of any Lender, in which its applicable  lending office is located,  (b) any
branch  profits taxes imposed by the United States of America or any similar tax
imposed by any other  jurisdiction  in which the  Borrower is located and (c) in
the case of a Foreign  Lender  (other than an assignee  pursuant to a request by
the Borrower  under  Section  2.19(b),  any  withholding  tax that is imposed on
amounts payable to such Foreign Lender at the time such Foreign Lender becomes a
party to this Agreement whether upon execution or upon assignment (or designates
a new lending  office) or is attributable  to such Foreign  Lender's  failure to


                                       6
                            364-DAY CREDIT AGREEMENT





comply with Section  2.17(e),  except to the extent that such Foreign Lender (or
its assignor,  if any) was entitled, at the time of designation of a new lending
office (or  assignment),  to receive  additional  amounts from the Borrower with
respect to such withholding tax pursuant to Section 2.17(a).

     "Executive Officer" means any Financial Officer,  executive vice president,
officer  ranking above an executive  vice  president and any officer that is the
functional equivalent of the foregoing.

     "Federal Funds  Effective  Rate" means,  for any day, the weighted  average
(rounded  upwards,  if  necessary,  to the  next  1/100  of 1%) of the  rates on
overnight Federal funds  transactions with members of the Federal Reserve System
arranged by Federal funds brokers,  as published on the next succeeding Business
Day by the  Federal  Reserve  Bank  of New  York,  or,  if  such  rate is not so
published for any day that is a Business Day, the average (rounded  upwards,  if
necessary,  to the  next  1/100 of 1%) of the  quotations  for such day for such
transactions  received  by the  Administrative  Agent from three  Federal  funds
brokers of recognized standing selected by it.

     "Final Maturity Date" means the earlier of:

            (a)  the  date occurring  one year  after the  Revolving  Commitment
Termination Date; and

            (b)  the date on which the Loans have become due and payable in full
pursuant to the terms of Article VII.


     "Financial  Officer" means, with respect to any Person, the chief financial
officer,  principal accounting officer,  treasurer or controller of such Person.
The  term  "Financial  Officer"  without  reference  to a  Person  shall  mean a
Financial Officer of the Borrower.

     "Foreign  Lender"  means any Lender that is  organized  under the laws of a
jurisdiction  other than that in which the Borrower is located.  For purposes of
this  definition,  the United  States of  America,  each State  thereof  and the
District of Columbia shall be deemed to constitute a single jurisdiction.

     "GAAP" means generally accepted accounting  principles in the United States
of America.

     "Governmental  Authority"  means the  government  of the  United  States of
America, any other nation or any political subdivision thereof, whether state or
local,  and any agency,  authority,  instrumentality,  regulatory  body,  court,
central  bank or  other  entity  exercising  executive,  legislative,  judicial,
taxing,  regulatory  or  administrative  powers or functions of or pertaining to
government.

     "Guarantee"  of or by any Person (the  "guarantor")  means any  obligation,
contingent or otherwise,  of the guarantor  guaranteeing  or having the economic
effect of guaranteeing  any Indebtedness or other obligation of any other Person
(the  "primary  obligor") in any manner,  whether  directly or  indirectly,  and
including any obligation of the guarantor,  direct or indirect,  (a) to purchase
or pay (or  advance  or  supply  funds  for the  purchase  or  payment  of) such


                                       7
                            364-DAY CREDIT AGREEMENT






Indebtedness  or other  obligation or to purchase (or to advance or supply funds
for the purchase of) any  security for the payment  thereof,  (b) to purchase or
lease property,  securities or services for the purpose of assuring the owner of
such Indebtedness or other obligation of the payment thereof, or (c) to maintain
working capital,  equity capital or any other financial  statement  condition or
liquidity of the primary obligor so as to enable the primary obligor to pay such
Indebtedness or other  obligation,  provided,  that the term Guarantee shall not
include  endorsements  for  collection  or  deposit  in the  ordinary  course of
business.

     "Hazardous  Materials"  means all  explosive or  radioactive  substances or
wastes  and all  hazardous  or toxic  substances,  wastes  or other  pollutants,
including  petroleum or petroleum  distillates,  asbestos or asbestos containing
materials,  polychlorinated  biphenyls,  radon gas, infectious or medical wastes
and all other  substances  or wastes of any  nature  regulated  pursuant  to any
Environmental Law.

     "Highest  Lawful  Rate" means,  with  respect to each  Lender,  the maximum
nonusurious  interest rate, if any, that at any time or from time to time may be
contracted for, taken,  reserved charged or received on the  Indebtedness  under
laws  applicable  to such Lender which are presently in effect or, to the extent
allowed by law, under such  applicable laws which may hereafter be in effect and
which allow a higher  maximum  nonusurious  interest rate than  applicable  laws
allow as of the date hereof.

     "Hydrocarbons"  means oil, gas,  casinghead  gas,  condensate,  distillate,
liquid  hydrocarbons,  gaseous  hydrocarbons,  all products refined,  separated,
settled and dehydrated therefrom and all products refined therefrom,  including,
without limitation, kerosene, liquefied petroleum gas, refined lubricating oils,
diesel fuel,  drip  gasoline,  natural  gasoline,  helium,  sulfur and all other
minerals.

     "Indebtedness"  of  any  Person  means,   without   duplication,   (a)  all
obligations  of such Person for  borrowed  money,  (b) all  obligations  of such
Person evidenced by bonds,  debentures,  notes or similar  instruments,  (c) all
obligations of such Person in respect of the deferred purchase price of property
or services (other than customary  payment terms taken in the ordinary course of
business), (d) all Indebtedness of others secured by (or for which the holder of
such Indebtedness has an existing right,  contingent or otherwise, to be secured
by) any Lien on property  owned or acquired by such  Person,  whether or not the
Indebtedness secured thereby has been assumed limited,  however to the lesser of
(1) the amount of its liability or (2) the book value of such property,  (e) all
Guarantees  by such Person of  Indebtedness  of others,  (f) all  Capital  Lease
Obligations of such Person,  (g) all  obligations,  contingent or otherwise,  of
such  Person as an account  party in  respect  of  letters  of  credit,  (h) all
obligations,  contingent  or  otherwise,  of such  Person in respect of bankers'
acceptances,  (i) the amount of deferred revenue  attributed to any forward sale
of production  for which such Person has received  payment in advance other than
on  ordinary  trade  terms,  (j) all  obligations  of such  Person in respect of
synthetic  leases and (k) the  undischarged  balance of any  production  payment
created by such  Person or for the  creation  of which such  Person  directly or
indirectly  received  payment.  The Indebtedness of any Person shall include the
Indebtedness of any other entity (including any partnership in which such Person
is a general  partner) to the extent such Person is liable  therefor as a result
of such Person's  ownership  interest in or other relationship with such entity,
except to the extent the terms of such Indebtedness  provide that such Person is
not liable therefor.


                                       8
                            364-DAY CREDIT AGREEMENT






      "Indemnified Taxes" means Taxes other than Excluded Taxes.

     "Index Debt" means senior,  unsecured,  long-term indebtedness for borrowed
money of the Borrower  that is not  guaranteed  by any other Person except for a
Subsidiary Guarantor or subject to any other credit enhancement;  provided, that
if the  Borrower  does not have any such  indebtedness,  Index Debt shall be the
indebtedness under this Agreement.

     "Interest  Election  Request" means a request by the Borrower to convert or
continue a Borrowing in accordance with Section 2.08.

     "Interest  Payment  Date" means (a) with respect to any ABR Loan,  the last
day of each March,  June,  September  and  December  and (b) with respect to any
Eurodollar Loan, the last day of the Interest Period applicable to the Borrowing
of which such Loan is a part and, in the case of a Eurodollar  Borrowing with an
Interest Period of more than three months' duration,  each day prior to the last
day of such Interest  Period that occurs at intervals of three months'  duration
after the first day of such Interest Period.

     "Interest  Period"  means with  respect to any  Eurodollar  Borrowing,  the
period  commencing on the date of such  Borrowing and ending on the  numerically
corresponding  day in the calendar  month that is one, two,  three or six months
or,  with  the  consent  of the  Administrative  Agent,  nine or  twelve  months
thereafter, as the Borrower may elect; provided, that (i) if any Interest Period
would end on a day other than a Business  Day,  such  Interest  Period  shall be
extended to the next succeeding Business Day unless, in the case of a Eurodollar
Borrowing  only,  such  next  succeeding  Business  Day  would  fall in the next
calendar  month,  in which  case  such  Interest  Period  shall  end on the next
preceding  Business Day and (ii) any Interest Period  pertaining to a Eurodollar
Borrowing  that  commences on the last Business Day of a calendar month (or on a
day for which there is no  numerically  corresponding  day in the last  calendar
month of such  Interest  Period)  shall end on the last Business Day of the last
calendar  month of such  Interest  Period.  For purposes  hereof,  the date of a
Borrowing  initially  shall be the date on which such  Borrowing is made and, in
the case of a Revolving Borrowing, thereafter shall be the effective date of the
most recent conversion or continuation of such Borrowing.

     "Lead Arranger" means J.P. Morgan Securities Inc.

     "Lenders"  means the Persons  listed on Schedule  2.01 and any other Person
that shall have become a party hereto  pursuant to an Assignment and Assumption,
other than any such  Person  that  ceases to be a party  hereto  pursuant  to an
Assignment and Assumption.

     "LIBO  Rate"  means,  with  respect  to any  Eurodollar  Borrowing  for any
Interest Period, the rate appearing on Page 3750 of the Dow Jones Market Service
(or on any successor or substitute page of such Service,  or any successor to or
substitute  for such  Service,  providing  rate  quotations  comparable to those
currently  provided  on  such  page  of  such  Service,  as  determined  by  the
Administrative  Agent from time to time for purposes of providing  quotations of
interest rates applicable to dollar deposits in the London interbank  market) at
approximately   11:00  a.m.,  London  time,  two  Business  Days  prior  to  the
commencement  of such Interest  Period,  as the rate for dollar  deposits with a
maturity  comparable to such Interest Period. In the event that such rate is not


                                       9
                            364-DAY CREDIT AGREEMENT





available at such time for any reason, then the "LIBO Rate" with respect to such
Eurodollar  Borrowing for such Interest Period shall be the rate at which dollar
deposits of $5,000,000 and for a maturity comparable to such Interest Period are
offered  by  the  principal  London  office  of  the  Administrative   Agent  in
immediately  available  funds in the London  interbank  market at  approximately
11:00 a.m.,  London time,  two Business Days prior to the  commencement  of such
Interest Period.

     "Lien" means,  with respect to any asset, (a) any mortgage,  deed of trust,
lien,  pledge,  hypothecation,  or security interest in, on or of such asset, or
any other  charge or  encumbrance  on any such asset to secure  Indebtedness  or
liabilities,  but excluding any right to netting or setoff (b) the interest of a
vendor or a lessor under any conditional sale agreement,  capital lease or title
retention  agreement  (or any  financing  lease  having  substantially  the same
economic  effect as any of the foregoing)  relating to such asset and (c) in the
case of securities,  any purchase option, call or similar right of a third party
with respect to such securities.

     "Loan  Documents"  means this Agreement and the Subsidiary  Guaranties,  if
any.

     "Loans" means the Revolving  Loans or Term Loans made by the Lenders to the
Borrower pursuant to this Agreement.

     "Material  Adverse  Effect"  means a  material  adverse  effect  on (a) the
business,  assets,  operations,  or financial  condition of the Borrower and the
Restricted Subsidiaries taken as a whole, (b) the ability of the Borrower or any
Subsidiary  Guarantor to perform any of its obligations under this Agreement and
any other  Loan  Document  or (c) the  rights of or  benefits  available  to the
Lenders under this Agreement and any other Loan Document.

     "Material  Indebtedness"  means  Indebtedness  (other than the  Loans),  or
obligations in respect of one or more Swap Agreements, of any one or more of the
Borrower  and  its  Subsidiaries  in an  aggregate  principal  amount  exceeding
$75,000,000.  For purposes of determining Material Indebtedness,  the "principal
amount" of the  obligations  of the Borrower or any Subsidiary in respect of any
Swap Agreement at any time shall be the maximum  aggregate amount (giving effect
to any  netting  agreements)  that  the  Borrower  or such  Subsidiary  would be
required to pay if such Swap Agreement were terminated at such time.

     "Mid-Investment  Grade Date"  means the first date on which the  Borrower's
Index Debt rating is BBB or better by S&P's or Baa2 or better by Moody's, unless
one of the two  ratings is two or more  categories  lower than the other and the
category that is one above the lower rating is not BBB or Baa2 or better.

     "Moody's" means Moody's Investors Service, Inc.

     "Multiemployer  Plan"  means a  multiemployer  plan as  defined  in Section
4001(a)(3) of ERISA.

     "Obligors"  means  the  Borrower  and the  Subsidiary  Guarantors,  each an
"Obligor".

     "Other  Taxes"  means any and all  present or future  stamp or  documentary
taxes or any other excise or property  taxes,  charges or similar levies arising



                                       10
                            364-DAY CREDIT AGREEMENT





from any payment made hereunder or from the  execution,  delivery or enforcement
of, or otherwise with respect to, this Agreement.

     "Participant" has the meaning set forth in Section 9.04.

     "PBGC"  means the  Pension  Benefit  Guaranty  Corporation  referred to and
defined in ERISA and any successor entity performing similar functions.

     "Permitted Encumbrances" means:

          (a) Liens imposed by law for taxes, assessments, or other governmental
     charges or levies  that are  not yet  delinquent or are  being contested in
     compliance with Section 5.04;

          (b) carriers', warehousemen's, mechanics', materialmen's, repairmen's,
     landlords, vendors, workmen, operators, and other like Liens arising in the
     ordinary course  of  business or  incident to the exploration, development,
     operation,  and maintenance  of Hydrocarbons  and  related  facilities  and
     assets and securing obligations that are  not overdue by more than  30 days
     or are being contested in compliance with Section 5.04;

          (c) pledges and  deposits made  in the  ordinary course of business in
     compliance with workers'  compensation,  unemployment insurance,  and other
     social security laws or regulations;

          (d) deposits  to  secure  the  performance  of  bids,  tenders,  trade
     contracts,   leases,  statutory   obligations,  surety  and  appeal  bonds,
     performance bonds,  and other obligations of a like nature, in each case in
     the ordinary course of business;

          (e) judgment liens in  respect of judgments  that do not constitute an
     Event of Default under clause (k) of Article VII;

          (f) easements,   zoning   restrictions,   rights-of-way,   servitudes,
     permits, conditions, exceptions,  reservations, and similar encumbrances on
     real property imposed by  law or arising in the ordinary course of business
     that do not secure  any Indebtedness  and do not  materially interfere with
     the  ordinary  conduct  of  business  of the  Borrower  or  any  Restricted
     Subsidiary;

          (g) legal or  equitable  encumbrances  deemed  to  exist  by reason of
     negative pledges such as in Section 6.02 of this Agreement or the existence
     of  any litigation or  other legal  proceeding and any  related lis pendens
     filing  (excluding  any  attachment  prior  to  judgment,  judgment lien or
     attachment lien in aid of execution on a judgment);

          (h) rights  of a  common  owner  of any  interest in  property held by
     Borrower or any Restricted Subsidiary as a common owner;

          (i) farmout,  carried  working interest, joint operating, unitization,
     royalty, overriding royalty, sales,  and similar agreements relating to the


                                       11
                            364-DAY CREDIT AGREEMENT





     exploration or development of,  or production from,  oil and gas properties
     incurred in the ordinary course of business,

          (j) Liens  arising  pursuant  to  Section  9.343 of the  Texas Uniform
     Commercial Code or other similar statutory  provisions of other states with
     respect to production purchased from others;

          (k) any   defects,   irregularities,   or  deficiencies  in  title  to
     easements, rights-of-way, or other properties which do not in the aggregate
     have a Material Adverse Effect;

          (l) Liens  on  the  stock  or  other  ownership  interest of or in any
     Unrestricted Subsidiary, provided that there is no recourse to the Borrower
     or any  Restricted Subsidiary  other than  recourse to  such stock or other
     ownership interest and proceeds thereof;

          (m) Liens in  renewal or  extension of  any of the foregoing permitted
     Liens,  so long as  limited  to the  property or assets  encumbered and the
     amounts  of indebtedness  secured  immediately  prior  to  such  renewal or
     extension is not increased; and

          (n) Liens approved in writing by or on behalf of the Required Lenders.

     "Person" means any natural person, corporation,  limited liability company,
trust, joint venture, association, company, partnership,  Governmental Authority
or other entity.

     "Plan" means any employee  pension benefit plan (other than a Multiemployer
Plan) subject to the  provisions of Title IV of ERISA or Section 412 of the Code
or  Section  302 of ERISA,  and in respect  of which the  Borrower  or any ERISA
Affiliate  is (or, if such plan were  terminated,  would under  Section  4069 of
ERISA be deemed to be) an "employer" as defined in Section 3(5) of ERISA.

     "Prime Rate" means the rate of interest per annum  publicly  announced from
time to time by JPMorgan Chase Bank as its prime rate in effect at its principal
office in New York City;  each change in the Prime Rate shall be effective  from
and including the date such change is publicly announced as being effective.

     "Register" has the meaning set forth in Section 9.04.

     "Related  Parties"  means,  with  respect  to any  specified  Person,  such
Person's Affiliates and the respective directors,  officers,  employees,  agents
and advisors of such Person and such Person's Affiliates.

     "Required  Lenders" means, at any time, Lenders having Credit Exposures and
unused Commitments  representing greater than 50% of the sum of the total Credit
Exposures and unused Commitments at such time.

     "Restricted  Subsidiaries"  means all Subsidiary  Guarantors  and,  without
duplication,  all  Subsidiaries  of  the  Borrower  that  are  not  Unrestricted
Subsidiaries.



                                       12
                            364-DAY CREDIT AGREEMENT






     "Revolving Commitment Termination Date" means the earliest of:

          (a) the date occurring 364 days after the Effective Date;

          (b) the  date on  which the  Commitments  are  terminated  in full  or
reduced  to zero  pursuant  to the terms of Section 2.09;

          (c) the date  on  which the  Commitments  are  terminated  in full and
reduced to zero  pursuant  to the terms of Article VII.

     "Revolving Loan" means a Loan made pursuant to Section 2.01.

     "S&P" means Standard & Poor's.

     "Sole Bookrunner" means J.P. Morgan Securities Inc.

     "Statutory  Reserve Rate" means a fraction  (expressed  as a decimal),  the
numerator of which is the number one and the  denominator of which is the number
one minus the  aggregate  of the  maximum  reserve  percentages  (including  any
marginal,  special,  emergency or supplemental  reserves) expressed as a decimal
established  by the  Board to which the  Administrative  Agent is  subject  with
respect to the Adjusted LIBO Rate, for eurocurrency  funding (currently referred
to as  "Eurocurrency  Liabilities"  in Regulation D of the Board).  Such reserve
percentages   shall  include  those  imposed  pursuant  to  such  Regulation  D.
Eurodollar  Loans shall be deemed to constitute  eurocurrency  funding and to be
subject to such reserve requirements without benefit of or credit for proration,
exemptions  or  offsets  that may be  available  from time to time to any Lender
under such Regulation D or any comparable regulation. The Statutory Reserve Rate
shall be adjusted automatically on and as of the effective date of any change in
any reserve percentage.

     "subsidiary"  means, with respect to any Person (the "parent") at any date,
any corporation,  limited liability company,  partnership,  association or other
entity the accounts of which would be  consolidated  with those of the parent in
the parent's consolidated financial statements if such financial statements were
prepared  in  accordance  with  GAAP as of  such  date,  as  well  as any  other
corporation, limited liability company, partnership, association or other entity
of which securities or other ownership  interests  representing more than 50% of
the ordinary voting power or, in the case of a partnership, more than 50% of the
general partnership interests are, as of such date, owned, controlled or held by
the parent and one or more subsidiaries of the parent.

     "Subsidiary" means any subsidiary of the Borrower.

     "Subsidiary Guarantor" means any Subsidiary that is required to execute and
deliver a Subsidiary Guaranty.

     "Subsidiary Guaranty" means a Subsidiary Guaranty substantially in the form
of Exhibit C executed by a Subsidiary.



                                       13
                            364-DAY CREDIT AGREEMENT






     "Swap  Agreement"  means any agreement  with respect to any swap,  forward,
future or derivative  transaction or option or similar agreement  involving,  or
settled by reference to, one or more rates, currencies,  commodities,  equity or
debt  instruments or securities,  or economic,  financial or pricing  indices or
measures  of  economic,  financial  or  pricing  risk or  value  or any  similar
transaction or any combination of these  transactions;  provided that no phantom
stock or similar  plan  providing  for  payments  only on  account  of  services
provided by current or former directors,  officers,  employees or consultants of
the Borrower or the Subsidiaries shall be a Swap Agreement.

     "Taxes" means any and all present or future taxes, levies, imposts, duties,
deductions, charges or withholdings imposed by any Governmental Authority.

     "Term  Loans"  means a  Revolving  Loan  that is  converted  to a Term Loan
pursuant to Section 2.02.

     "Total Cap" means, as of any date of  determination,  the sum of Total Debt
plus  Consolidated  Tangible  Net  Worth  of the  Borrower  and  the  Restricted
Subsidiaries.

     "Total  Adjusted  Debt"  means  as  of  any  date  of  determination,   all
Indebtedness   (without   duplication)   of  the  Borrower  and  the  Restricted
Subsidiaries on a consolidated basis (including any Indebtedness  proposed to be
incurred on such date of determination and excluding all Indebtedness to be paid
on such date of determination with the proceeds thereof).

     "Total  Debt"  means  as of any  date of  determination,  all  Indebtedness
(without  duplication)  of the Borrower  and the  Restricted  Subsidiaries  on a
consolidated  basis (including any Indebtedness  proposed to be incurred on such
date of determination  and excluding all Indebtedness to be paid on such date of
determination with the proceeds thereof and excluding any Indebtedness described
in clause (g) of the definition of Indebtedness herein).

     "Transactions"  means  the  execution,  delivery  and  performance  by  the
Borrower of this  Agreement,  the  borrowing  of Loans,  the use of the proceeds
thereof  and  the  guarantee  by  the  Subsidiary  Guarantors,  if  any,  of the
obligations of the Borrower under this Agreement.

     "Type", when used in reference to any Loan or Borrowing,  refers to whether
the rate of interest on such Loan, or on the Loans comprising such Borrowing, is
determined by reference to the Adjusted LIBO Rate or the Alternate Base Rate.

     "Unrestricted Subsidiary" means:

          (1) any  Subsidiary of the  Borrower that at the time of determination
shall be designated an  Unrestricted  Subsidiary  by a  Financial Officer of the
Borrower in the manner provided below; and

          (2) any Subsidiary of an Unrestricted Subsidiary.  A Financial Officer
may designate any  Subsidiary of the Borrower  (including  any newly acquired or
newly  formed  Subsidiary  of  the  Borrower  and a  Restricted  Subsidiary  but
excluding any Subsidiary Guarantor) to be an Unrestricted Subsidiary unless such
Subsidiary or any of its Subsidiaries  owns any Equity Interests or Indebtedness
of, or owns or holds any Lien on any  property  of,  the  Borrower  or any other


                                       14
                            364-DAY CREDIT AGREEMENT






Subsidiary of the Borrower  that is not a Subsidiary of the  Subsidiary to be so
designated.  A Financial Officer may designate any Unrestricted Subsidiary to be
a  Restricted  Subsidiary;  provided,  however,  that (i) giving  effect to such
designation  shall not result in the occurrence and continuance of a Default and
(ii) any  Indebtedness of such  Subsidiary  shall not be secured by Liens at the
time of such  designation  except for Liens  permitted by Section 6.02. Any such
designation  by a Financial  Officer  shall be evidenced  to the  Administrative
Agent by promptly filing with the Administrative  Agent a copy of the resolution
of a  Financial  Officer  giving  effect to such  designation  and an  Officers'
Certificate  certifying  that  such  designation  complied  with  the  foregoing
provisions.

     "Withdrawal  Liability" means liability to a Multiemployer Plan as a result
of a complete or partial withdrawal from such Multiemployer  Plan, as such terms
are defined in Part I of Subtitle E of Title IV of ERISA.

     Section 1.02  Classification of Loans and Borrowings.  For purposes of this
Agreement,  Loans may be classified and referred to by Class (e.g., a "Revolving
Loan") or by Type (e.g.,  a  "Eurodollar  Loan") or by Class and Type  (e.g.,  a
"Eurodollar Revolving Loan").  Borrowings also may be classified and referred to
by Class  (e.g.,  a  "Revolving  Borrowing")  or by Type  (e.g.,  a  "Eurodollar
Borrowing") or by Class and Type (e.g., a "Eurodollar Revolving Borrowing").

     Section 1.03 Terms  Generally.  The definitions of terms herein shall apply
equally to the  singular  and plural  forms of the terms  defined.  Whenever the
context may require,  any pronoun  shall  include the  corresponding  masculine,
feminine and neuter forms. The words "include", "includes" and "including" shall
be deemed to be followed  by the phrase  "without  limitation".  The word "will"
shall be  construed  to have the same  meaning  and effect as the word  "shall".
Unless the context requires  otherwise (a) any definition of or reference to any
agreement,  instrument or other document  herein shall be construed as referring
to such  agreement,  instrument or other  document as from time to time amended,
supplemented  or  otherwise  modified  (subject  to  any  restrictions  on  such
amendments,  supplements or modifications  set forth herein),  (b) any reference
herein to any Person shall be construed to include such Person's  successors and
assigns, (c) the words "herein", "hereof" and "hereunder",  and words of similar
import, shall be construed to refer to this Agreement in its entirety and not to
any  particular  provision  hereof,  (d)  all  references  herein  to  Articles,
Sections,  Exhibits  and  Schedules  shall be construed to refer to Articles and
Sections of, and Exhibits and  Schedules  to, this  Agreement  and (e) the words
"asset" and  "property"  shall be  construed to have the same meaning and effect
and to refer to any and all  tangible  and  intangible  assets  and  properties,
including cash, securities, accounts and contract rights.

     Section 1.04 Accounting Terms; GAAP. Except as otherwise expressly provided
herein,  all terms of an  accounting  or financial  nature shall be construed in
accordance  with GAAP,  as in effect from time to time;  provided  that,  if the
Borrower  notifies  the  Administrative  Agent  that the  Borrower  requests  an
amendment  to any  provision  hereof  to  eliminate  the  effect  of any  change
occurring  after  the date  hereof in GAAP  (including  but not  limited  to any
Statement of Financial  Accounting  Standards) or in the application  thereof on
the operation of such  provision (or if the  Administrative  Agent  notifies the


                                       15
                            364-DAY CREDIT AGREEMENT






Borrower that the Required  Lenders request an amendment to any provision hereof
for such  purpose),  regardless  of whether any such  notice is given  before or
after such change in GAAP or in the  application  thereof,  then such  provision
shall be interpreted  on the basis of GAAP as in effect and applied  immediately
before such change shall have become effective until such notice shall have been
withdrawn or such provision amended in accordance herewith.

                                    ARTICLE II
                                   THE CREDITS

     Section 2.01  Commitments.  Subject to the terms and  conditions  set forth
herein,  each Lender agrees to make  Revolving  Loans in dollars to the Borrower
from time to time  during  the  Availability  Period in an  aggregate  principal
amount that will not result in (i) such Lender's Credit Exposure  exceeding such
Lender's  Commitment or (ii) the sum of the total Credit Exposures exceeding the
total  Commitments.  Within the  foregoing  limits and  subject to the terms and
conditions  set forth  herein,  the  Borrower  may borrow,  prepay and  reborrow
Revolving Loans prior to the Revolving Commitment Termination Date.

     Section 2.02  Conversion  to Term Loans.  At the option of the Borrower and
subject to the  satisfaction  of the  conditions  precedent  for a Borrowing set
forth in Section 4.02, upon written notice delivered to the Administrative Agent
no  earlier  than 60 days and no later  than  three  Business  Days prior to the
Revolving Credit  Termination  Date, the aggregate  principal amount of all, but
not less than all, of the Revolving Loans remaining  outstanding at the close of
the  Administrative  Agent's business on the Revolving  Credit  Termination Date
shall  automatically  convert to Term Loans  with a  maturity  of one year.  Any
portion of each  Lender's  Commitment  not  utilized on or before the  Revolving
Credit Termination Date shall be permanently cancelled.  Any Term Loans that are
prepaid may not be reborrowed.

     Section 2.03  Revolving Loans and Borrowings.

          (a) Each  Revolving  Loan  shall  be  made  as  part  of  a  Borrowing
consisting of Revolving  Loans made by the Lenders  ratably in  accordance  with
their  respective  Commitments.  The  failure  of any  Lender  to make  any Loan
required to be made by it shall not relieve any other Lender of its  obligations
hereunder;  provided  that the  Commitments  of the  Lenders  are several and no
Lender  shall be  responsible  for any other  Lender's  failure to make Loans as
required.

          (b) Subject  to  Section  2.14,  each  Revolving  Borrowing  shall  be
comprised  entirely of ABR Loans or Eurodollar Loans as the Borrower may request
in accordance herewith.  Each Lender at its option (but subject to Section 2.19)
may make any  Eurodollar  Loan by causing  any  domestic  or  foreign  branch or
Affiliate of such Lender to make such Loan;  provided  that any exercise of such
option  shall not affect the  obligation  of the  Borrower to repay such Loan in
accordance with the terms of this Agreement.

          (c) At  the  commencement of  each Interest  Period for any Eurodollar
Revolving  Borrowing,  such Borrowing shall be in an aggregate amount that is an
integral  multiple of $1,000,000 and not less than $5,000,000.  At the time that
each ABR Revolving  Borrowing is made,  such Borrowing  shall be in an aggregate
amount that is an integral  multiple of $1,000,000 and not less than $5,000,000;
provided that an ABR Revolving  Borrowing may be in an aggregate  amount that is


                                       16
                            364-DAY CREDIT AGREEMENT






equal to the entire unused balance of the total Commitments.  Borrowings of more
than one Type and Class may be outstanding at the same time; provided that there
shall  not at  any  time  be  more  than a  total  of 10  Eurodollar  Borrowings
outstanding.

          (d) Notwithstanding  any other  provision of  this Agreement,  (i) the
Borrower shall not be entitled to request,  or to elect to convert (except for a
conversion to a Term Loan  pursuant to Section 2.02) or continue,  any Revolving
Loan if the Interest  Period  requested  thereto  would end after the  Revolving
Commitment Termination Date and (ii) the Borrower shall not be entitled to elect
to convert or  continue  any  Eurodollar  Loan  after the  Revolving  Commitment
Termination Date if the Interest Period requested with respect thereto would end
after the Final Maturity Date.

     Section 2.04  Requests  for  Revolving  Borrowings.  To request a Revolving
Borrowing, the Borrower shall notify the Administrative Agent of such request by
telephone (a) in the case of a Eurodollar Borrowing,  not later than 12:00 noon,
New York  City  time,  three  Business  Days  before  the  date of the  proposed
Borrowing  and (b) in the case of an ABR  Borrowing,  not later than 12:00 noon,
New York City time,  on the same  Business Day of the proposed  Borrowing.  Each
such  telephonic  Borrowing  Request shall be irrevocable and shall be confirmed
promptly by hand delivery or telecopy to the  Administrative  Agent of a written
Borrowing Request in a form approved by the  Administrative  Agent and signed by
the Borrower.  Each such telephonic and written  Borrowing Request shall specify
the following information in compliance with Section 2.03:

               (i)   the aggregate amount of the requested Borrowing;

               (ii)  the date of such Borrowing, which shall be a Business Day;

               (iii) whether  such  Borrowing  is to  be an  ABR Borrowing  or a
Eurodollar Borrowing;

               (iv)  in the case of a Eurodollar Borrowing, the initial Interest
Period to be applicable  thereto,  which shall be a period  contemplated  by the
definition of the term "Interest Period"; and

               (v)   the location and number of the  Borrower's account to which
funds are to be disbursed,  which shall comply  with the requirements of Section
2.07.

If no election as to the Type of  Revolving  Borrowing  is  specified,  then the
requested  Borrowing  shall  be an  ABR  Borrowing.  If no  Interest  Period  is
specified with respect to any requested Eurodollar Revolving Borrowing, then the
Borrower  shall be deemed to have  selected  an  Interest  Period of one month's
duration.  Promptly  following receipt of a Borrowing Request in accordance with
this Section,  the Administrative  Agent shall advise each Lender of the details
thereof  and of the  amount  of  such  Lender's  Loan  to be made as part of the
requested Borrowing.

     Section 2.05  Intentionally Omitted

     Section 2.06  Intentionally Omitted



                                       17
                            364-DAY CREDIT AGREEMENT





     Section 2.07  Funding of Borrowings.

          (a) Each  Lender  shall make  each  Revolving  Loan to  be made  by it
hereunder on the proposed date thereof by wire transfer of immediately available
funds by 1:00 pm, New York City time, to the account of the Administrative Agent
most recently  designated  by it for such purpose by notice to the Lenders.  The
Administrative Agent will make such Revolving Loans available to the Borrower by
promptly crediting the amounts so received,  in like funds, to an account of the
Borrower  maintained  with  the  Administrative  Agent  in  New  York  City  and
designated by the Borrower in the applicable Borrowing Request.

           (b) Unless the Administrative Agent shall have received notice from a
Lender prior to the  proposed  date of any  Borrowing  that such Lender will not
make  available  to  the  Administrative  Agent  such  Lender's  share  of  such
Borrowing,  the  Administrative  Agent may assume that such Lender has made such
share  available on such date in accordance  with  paragraph (a) of this Section
and may, in reliance  upon such  assumption,  make  available  to the Borrower a
corresponding  amount. In such event, if a Lender has not in fact made its share
of the applicable  Borrowing  available to the  Administrative  Agent,  then the
applicable Lender and the Borrower  severally agree to pay to the Administrative
Agent forthwith on demand such corresponding  amount with interest thereon,  for
each day from and  including  the date  such  amount  is made  available  to the
Borrower to but excluding the date of payment to the  Administrative  Agent,  at
(i) in the case of such Lender,  the greater of the Federal Funds Effective Rate
and a rate  determined by the  Administrative  Agent in accordance  with banking
industry  rules on interbank  compensation  or (ii) in the case of the Borrower,
the interest rate  applicable to the applicable  Borrowing.  If such Lender pays
such amount to the Administrative  Agent, then such amount shall constitute such
Lender's Revolving Loan included in such Borrowing.

     Section 2.08  Interest Elections.

          (a) Each Revolving Borrowing  initially shall be of the Type specified
in the applicable  Borrowing Request and, in the case of a Eurodollar  Revolving
Borrowing,  shall have an initial Interest Period as specified in such Borrowing
Request.  Thereafter,  the  Borrower  may elect to convert  such  Borrowing to a
different  Type or to continue such  Borrowing  and, in the case of a Eurodollar
Borrowing, may elect Interest Periods therefor, all as provided in this Section.
The Borrower may elect different  options with respect to different  portions of
the  affected  Borrowing,  in which case each such  portion  shall be  allocated
ratably among the Lenders holding the Loans  comprising such Borrowing,  and the
Loans comprising each such portion shall be considered a separate Borrowing.

          (b) To make an election pursuant  to this Section,  the Borrower shall
notify the Administrative Agent of such election by telephone by the time that a
Borrowing  Request  would be required  under  Section 2.04 if the Borrower  were
requesting a Revolving  Borrowing of the Type resulting from such election to be
made on the  effective  date of such  election.  Each such  telephonic  Interest
Election  Request shall be irrevocable  and shall be confirmed  promptly by hand
delivery or telecopy to the Administrative  Agent of a written Interest Election
Request  in a form  approved  by the  Administrative  Agent  and  signed  by the
Borrower.



                                       18
                            364-DAY CREDIT AGREEMENT







          (c) Each  telephonic  and  written  Interest  Election  Request  shall
specify the following information in compliance with Section 2.03:

               (i) the Borrowing to which such Interest Election Request applies
and, if different  options are being elected with respect to different  portions
thereof,  the portions  thereof to be allocated to each resulting  Borrowing (in
which case the  information  to be specified  pursuant to clauses (iii) and (iv)
below shall be specified for each resulting Borrowing);

               (ii) the  effective date  of the  election made  pursuant to such
Interest Election Request, which shall be a Business Day;

               (iii) whether the resulting  Borrowing is  to be an ABR Borrowing
or a Eurodollar Borrowing; and

               (iv) if the  resulting Borrowing  is a Eurodollar Borrowing,  the
Interest  Period to be applicable  thereto after giving effect to such election,
which shall be a period  contemplated  by the  definition of the term  "Interest
Period".

If any such Interest  Election Request requests a Eurodollar  Borrowing but does
not  specify  an  Interest  Period,  then the  Borrower  shall be deemed to have
selected an Interest Period of one month's duration.

          (d) Promptly  following  receipt of an  Interest Election Request, the
Administrative Agent shall advise each Lender of the details thereof and of such
Lender's portion of each resulting Borrowing.

          (e) If the  Borrower  fails  to deliver  a  timely  Interest  Election
Request with respect to a Eurodollar  Borrowing prior to the end of the Interest
Period  applicable  thereto,  then,  unless such Borrowing is repaid as provided
herein,  at the end of such Interest Period such Borrowing shall be converted to
an ABR Borrowing.  Notwithstanding any contrary provision hereof, if an Event of
Default has occurred and is  continuing  and the  Administrative  Agent,  at the
request of the Required Lenders,  so notifies the Borrower,  then, so long as an
Event of Default is continuing (i) no outstanding  Borrowing may be converted to
or continued as a Eurodollar  Borrowing and (ii) unless repaid,  each Eurodollar
Borrowing  shall be  converted  to an ABR  Borrowing  at the end of the Interest
Period applicable thereto.

     Section 2.09  Termination and Reduction of Commitments.

          (a) Unless previously terminated,  the Commitments  shall terminate on
the Revolving Commitment Termination Date.

          (b) The  Borrower may  at any  time  during  the  Availability  Period
terminate, or from time to time, reduce the Commitments;  provided that (i) each
reduction of the Commitments  shall be in an amount that is an integral multiple
of  $1,000,000  and not less than  $5,000,000  and (ii) the  Borrower  shall not
terminate or reduce the  Commitments  if, after giving effect to any  concurrent
prepayment of the Loans in accordance  with Section  2.11,  the Credit  Exposure
would exceed the Commitments.



                                       19
                            364-DAY CREDIT AGREEMENT






          (c) The Borrower shall notify the Administrative Agent of any election
to terminate or reduce the  Commitments  under  paragraph (b) of this Section at
least three  Business Days prior to the effective  date of such  termination  or
reduction,  specifying  such election and the effective  date thereof.  Promptly
following  receipt of any notice,  the  Administrative  Agent  shall  advise the
Lenders of the contents thereof.  Each notice delivered by the Borrower pursuant
to this Section shall be  irrevocable;  provided that a notice of termination of
the  Commitments  delivered  by the  Borrower  may  state  that  such  notice is
conditioned  upon the  effectiveness of other credit  facilities,  in which case
such  notice  may be revoked by the  Borrower  (by notice to the  Administrative
Agent on or prior to the  specified  effective  date) if such  condition  is not
satisfied.  Any termination or reduction of the Commitments  shall be permanent.
Each  reduction of the  Commitments  shall be made ratably  among the Lenders in
accordance with their respective Applicable Percentage.

     Section 2.10  Repayment of Loans; Evidence of Debt.

          (a) The Borrower  hereby unconditionally  promises  to pay  (i) to the
Administrative  Agent for the account of each  Lender the then unpaid  principal
amount of each  Revolving  Loan on the  Revolving  Commitment  Termination  Date
(unless  converted  to Term  Loans  pursuant  to  Section  2.02) and (ii) to the
Administrative  Agent for the account of each  Lender the then unpaid  principal
amount of each Term Loan on the Final Maturity Date.

          (b) Each  Lender shall maintain in accordance with its  usual practice
an account or  accounts  evidencing  the  indebtedness  of the  Borrower to such
Lender  resulting  from each Loan made by such Lender,  including the amounts of
principal  and  interest  payable  and  paid to such  Lender  from  time to time
hereunder.

          (c) The  Administrative  Agent  shall  maintain  accounts in  which it
shall  record  (i) the  amount of each Loan made  hereunder,  the Class and Type
thereof  and the  Interest  Period  applicable  thereto,  (ii) the amount of any
principal  or interest  due and  payable or to become due and  payable  from the
Borrower to each Lender  hereunder  and (iii) the amount of any sum  received by
the  Administrative  Agent  hereunder  for the  account of the  Lenders and each
Lender's share thereof.

          (d) The entries  made in the accounts maintained pursuant to paragraph
(b) or (c) of this Section 2.10 shall be prima facie  evidence of the  existence
and amounts of the obligations  recorded  therein;  provided that the failure of
any Lender or the  Administrative  Agent to maintain  such accounts or any error
therein shall not in any manner  affect the  obligation of the Borrower to repay
the Loans in accordance with the terms of this Agreement.

          (e) Any Lender may  request that  Loans made  by it  be evidenced by a
promissory note. In such event, the Borrower shall prepare,  execute and deliver
to such  Lender a  promissory  note  payable to the order of such Lender (or, if
requested  by such  Lender,  to such  Lender  and its  registered  assigns)  and
substantially  in the form attached hereto as Exhibit D.  Thereafter,  the Loans
evidenced  by such  promissory  note and  interest  thereon  shall at all  times
(including after  assignment  pursuant to Section 9.04) be represented by one or
more  promissory  notes in such form  payable  to the  order of the payee  named
therein (or, if such promissory note is a registered note, to such payee and its
registered assigns).


                                       20
                            364-DAY CREDIT AGREEMENT







     Section 2.11  Prepayment of Loans.

          (a) Subject to any breakage funding costs  payable pursuant to Section
2.16,  the  Borrower  shall  have the right at any time and from time to time to
prepay any  Borrowing in whole or in part without  premium or penalty,  provided
that each prepayment is in an amount that is an integral  multiple of $1,000,000
and not less than  $5,000,000,  or if such  amount is  lesser,  the  outstanding
amount of the  Borrowing,  and made subject to prior notice in  accordance  with
paragraph (b) of this Section.

          (b) The Borrower  shall notify  the Administrative  Agent by telephone
(confirmed  by  telecopy)  of  any  prepayment  hereunder  (i) in  the  case  of
prepayment of a Eurodollar  Borrowing,  not later than 12:00 noon, New York City
time,  three  Business Days before the date of prepayment or (ii) in the case of
prepayment of an ABR  Borrowing,  not later than 12:00 noon, New York City time,
on the date of  prepayment.  Each such  notice  shall be  irrevocable  and shall
specify  the  prepayment  date and the  principal  amount of each  Borrowing  or
portion thereof to be prepaid; provided that, if a notice of prepayment is given
in connection  with a conditional  notice of termination  of the  Commitments as
contemplated  by Section 2.09,  then such notice of prepayment may be revoked if
such notice of termination is revoked in accordance with Section 2.09.  Promptly
following receipt of any such notice relating to a Borrowing, the Administrative
Agent shall advise the Lenders of the contents thereof.  Each partial prepayment
of any Borrowing shall be in an amount that would be permitted in the case of an
advance  of a  Borrowing  of the same Type as  provided  in Section  2.03.  Each
prepayment of a Borrowing  shall be applied ratably to the Loans included in the
prepaid  Borrowing.  Prepayments shall be accompanied by accrued interest to the
extent required by Section 2.13.

     Section 2.12  Fees.

          (a) The  Borrower agrees  to pay  to the  Administrative Agent for the
account of each Lender a commitment  fee,  which shall accrue at the  Applicable
Margin for commitment fees on the daily amount of the unused  Commitment of such
Lender during the period from and including the date hereof to but excluding the
date on which  such  Commitment  terminates.  Accrued  commitment  fees shall be
payable in arrears on the last day of March,  June,  September  and  December of
each year and on the date on which the Commitments terminate,  commencing on the
first such date to occur after the date  hereof.  All  commitment  fees shall be
computed  on the  basis of a year of 365 days (or 366 days in a leap  year)  and
shall be payable for the actual number of days elapsed  (including the first day
but excluding the last day).

          (b) The Borrower agrees to pay  to the  Administrative Agent,  for its
own account, fees payable in the amounts and at the times separately agreed upon
in writing between the Borrower and the Administrative Agent.

          (c) The Borrower  agrees to  pay to  the Administrative  Agent for the
account of each Lender on the date the  Revolving  Loans convert to Term Loans a
term loan fee equal to the  product  of 0.05%  times  such  Lender's  Applicable
Percentage of the Term Loans converted pursuant to Section 2.02.



                                       21
                            364-DAY CREDIT AGREEMENT






          (d) All  fees payable  hereunder shall  be paid  on the  dates due, in
immediately  available funds, to the Administrative  Agent for distribution,  in
the case of commitment fees and term loan fees, to the Lenders.  Fees paid shall
not be refundable under any circumstances.

     Section 2.13  Interest.

          (a) The Loans comprising each ABR Borrowing shall bear interest at the
Alternate Base Rate  plus the  Applicable Margin,  but not to exceed the Highest
Lawful Rate.

          (b) The Loans comprising each Eurodollar Borrowing shall bear interest
at the Adjusted LIBO Rate for the Interest  Period in effect for such  Borrowing
plus the Applicable Margin, but not to exceed the Highest Lawful Rate.

          (c) Notwithstanding the foregoing,  if any principal of or interest on
any Loan or any fee or other  amount  payable by the  Borrower  hereunder is not
paid when due, whether at stated maturity, upon acceleration or otherwise,  such
overdue amount shall bear interest,  after as well as before judgment, at a rate
per annum equal to (i) in the case of overdue principal of any Loan, 2% plus the
rate otherwise  applicable to such Loan as provided in the preceding  paragraphs
of this  Section  or (ii) in the  case of any  other  amount,  2% plus  the rate
applicable to ABR Loans as provided in paragraph (a) of this Section, but not to
exceed the Highest Lawful Rate.

          (d) Accrued interest on each Loan shall be payable in  arrears on each
Interest  Payment Date for such Loan and, in the case of Revolving  Loans,  upon
termination of the  Commitments;  provided that (i) interest accrued pursuant to
paragraph (c) of this Section  shall be payable on demand,  (ii) in the event of
any  repayment  or  prepayment  of any Loan (other than a  prepayment  of an ABR
Revolving Loan prior to the end of the Availability Period), accrued interest on
the  principal  amount  repaid or  prepaid  shall be payable on the date of such
repayment  or  prepayment  and  (iii)  in the  event  of any  conversion  of any
Eurodollar  Revolving  Loan  prior  to the end of the  current  Interest  Period
therefor,  accrued  interest on such Loan shall be payable on the effective date
of such conversion.

          (e) All interest hereunder shall be computed on the basis of a year of
360 days,  except that interest computed by reference to the Alternate Base Rate
at times  when the  Alternate  Base  Rate is based on the  Prime  Rate  shall be
computed on the basis of a year of 365 days (or 366 days in a leap year), and in
each case shall be payable for the actual number of days elapsed  (including the
first day but  excluding  the last day).  The  applicable  Alternate  Base Rate,
Adjusted LIBO Rate or LIBO Rate shall be determined by the Administrative  Agent
and such determination shall be conclusive absent manifest error.

     Section 2.14  Alternate Rate of Interest.  If prior to the commencement of
any Interest Period for a Eurodollar  Borrowing:

          (a) the Administrative Agent Determines (which  determination shall be
conclusive  absent  manifest  error) that adequate and  reasonable  means do not
exist for  ascertaining  the Adjusted LIBO Rate or the LIBO Rate, as applicable,
for such Interest Period; or



                                       22
                            364-DAY CREDIT AGREEMENT






          (b) the Administrative Agent  is advised by the  Required Lenders that
the Adjusted LIBO Rate or the LIBO Rate, as applicable, for such Interest Period
will not  adequately  and fairly  reflect the cost to such  Lenders of making or
maintaining their Loans included in such Borrowing for such Interest Period;

then the Administrative  Agent shall give notice thereof to the Borrower and the
Lenders by  telephone  or telecopy as promptly as  practicable  thereafter  and,
until the  Administrative  Agent  notifies the Borrower and the Lenders that the
circumstances  giving  rise to such  notice no longer  exist,  (i) any  Interest
Election   Request  that  requests  the  conversion  of  any  Borrowing  to,  or
continuation  of any Borrowing as, a Eurodollar  Borrowing  shall be ineffective
and  (ii)  if any  Borrowing  Request  requests  a  Eurodollar  Borrowing,  such
Borrowing shall be made as an ABR Borrowing;  provided that if the circumstances
giving rise to such notice  affect  only one Type of  Borrowing,  then the other
Type of Borrowing shall be permitted.

     Section 2.15  Increased Costs.

          (a) If any Change in Law shall:

              (i) impose, modify or deem applicable any reserve, special deposit
or similar  requirement  against assets of, deposits with or for the account of,
or credit extended by, any Lender (except any such reserve requirement reflected
in the Adjusted LIBO Rate); or

              (ii) impose on any Lender or the London interbank market any other
condition  affecting  this  Agreement or  Eurodollar  Loans made by such Lender;
(excluding,  in each case, Taxes, as to which Section 2.17 shall govern) and the
result of any of the  foregoing  shall be to increase the cost to such Lender of
making or maintaining  any Eurodollar  Loan (or of maintaining its obligation to
make any such Loan) or to reduce the amount of any sum received or receivable by
such Lender hereunder  (whether of principal,  interest or otherwise),  then the
Borrower  will pay to such  Lender  such  additional  amount or  amounts as will
compensate such Lender for such additional costs incurred or reduction suffered.

          (b) If any Lender determines  that any Change in Law regarding capital
requirements has or would have the effect of reducing the rate of return on such
capital  or on the  capital  of such  Lender's  holding  company,  if any,  as a
consequence  of this Agreement or the Loans made by such Lender to a level below
that which such Lender or such Lender's  holding company could have achieved but
for such Change in Law (taking into consideration such Lender's policies and the
policies of such  Lender's  holding  company with respect to capital  adequacy),
then from time to time the  Borrower  will pay to such  Lender  such  additional
amount or  amounts  as will  compensate  such  Lender or such  Lender's  holding
company for any such reduction suffered.

          (c) A certificate of a Lender  setting forth in  reasonable detail the
amount or amounts necessary to compensate such Lender or its holding company, as
the case may be, as specified in paragraph  (a) or (b) of this Section  shall be
delivered to the Borrower.  The Borrower shall pay to the  Administrative  Agent
for the account of such Lender the amount  shown as due on any such  certificate
within 10 days after receipt thereof.



                                       23
                            364-DAY CREDIT AGREEMENT






          (d) Failure or delay  on the part of any Lender to demand compensation
pursuant to this Section shall not constitute a waiver of such Lender's right to
demand such  compensation;  provided that the Borrower  shall not be required to
compensate a Lender  pursuant to this Section 2.15(d) for any increased costs or
reductions  incurred  more  than 270 days  prior to the date  that  such  Lender
notifies the Borrower of the Change in Law giving rise to such  increased  costs
or reductions  and of such Lender's  intention to claim  compensation  therefor;
provided  further that, if the Change in Law giving rise to such increased costs
or reductions is retroactive, then the 270-day period referred to above shall be
extended to include the period of retroactive effect thereof.

     Section 2.16 Break Funding Payments. In the event of (a) the payment of any
principal  of any  Eurodollar  Loan  other  than on the last day of an  Interest
Period applicable  thereto  (including as a result of an Event of Default),  (b)
the conversion of any Eurodollar Loan other than on the last day of the Interest
Period  applicable  thereto,  (c) the  failure to borrow,  convert,  continue or
prepay  any  Eurodollar  Loan on the  date  specified  in any  notice  delivered
pursuant hereto  (regardless of whether such notice may be revoked under Section
2.11(b) and is revoked in accordance  therewith),  or (d) the  assignment of any
Eurodollar  Loan other than on the last day of the  Interest  Period  applicable
thereto as a result of a request by the Borrower pursuant to Section 2.19, then,
in any such event,  the Borrower shall compensate each Lender for the loss, cost
and expense  attributable to such event. In the case of a Eurodollar  Loan, such
loss,  cost or  expense  to any  Lender  shall be  deemed to  include  an amount
determined  by such  Lender  to be the  excess,  if any,  of (i) the  amount  of
interest which would have accrued on the principal  amount of such Loan had such
event not occurred, at the Adjusted LIBO Rate that would have been applicable to
such  Loan,  for the  period  from the date of such event to the last day of the
then current  Interest  Period therefor (or, in the case of a failure to borrow,
convert or continue, for the period that would have been the Interest Period for
such  Loan),  over  (ii) the  amount  of  interest  which  would  accrue on such
principal  amount for such period at the  interest  rate which such Lender would
bid were it to bid, at the commencement of such period, for dollar deposits of a
comparable  amount  and period  from other  banks in the  eurodollar  market.  A
certificate  of any Lender  setting forth any amount or amounts that such Lender
is entitled to receive  pursuant to this Section in  reasonable  detail shall be
delivered to the Borrower.  The Borrower shall pay to the  Administrative  Agent
for the account of such Lender the amount  shown as due on any such  certificate
within 10 days after receipt thereto.

     Section 2.17  Taxes.

          (a) Any and  all payments  by or  on account  of any obligation of the
Borrower hereunder shall be made free and clear of and without deduction for any
Indemnified  Taxes  or  Other  Taxes;  provided  that if the  Borrower  shall be
required to deduct any Indemnified Taxes or Other Taxes from such payments, then
(i) the sum payable  shall be  increased  as  necessary so that after making all
required deductions  (including deductions applicable to additional sums payable
under  this  Section)  the  Administrative  Agent or Lender (as the case may be)
receives  an  amount  equal  to the  sum it  would  have  received  had no  such
deductions been made, (ii) the Borrower shall make such deductions and (iii) the
Borrower  shall  pay the  full  amount  deducted  to the  relevant  Governmental
Authority in accordance with applicable law.



                                       24
                            364-DAY CREDIT AGREEMENT






          (b) In  addition,  the  Borrower  shall  pay  any  Other  Taxes to the
relevant Governmental Authority in accordance with applicable law.

          (c) The Borrower  shall indemnify  the Administrative  Agent  and each
Lender within 10 days after written demand therefor,  for the full amount of any
Indemnified  Taxes  or  Other  Taxes  paid by the  Administrative  Agent or such
Lender,  as the case may be, on or with  respect to any payment by or on account
of any  obligation of the Borrower  hereunder  (including  Indemnified  Taxes or
Other Taxes imposed or asserted on or attributable to amounts payable under this
Section) and any penalties,  interest and reasonable  expenses arising therefrom
or with respect thereto,  whether or not such  Indemnified  Taxes or Other Taxes
were  correctly  or legally  imposed or  asserted by the  relevant  Governmental
Authority.  A  certificate  as to the  amount of such  payment or  liability  in
reasonable  detail shall be  delivered  to the  Borrower by a Lender,  or by the
Administrative Agent on its own behalf or on behalf of a Lender.

          (d) As soon  as practicable  after any payment of Indemnified Taxes or
Other Taxes by the Borrower to a  Governmental  Authority,  the  Borrower  shall
deliver  to the  Administrative  Agent the  original  or a  certified  copy of a
receipt issued by such Governmental Authority evidencing such payment, a copy of
the return  reporting such payment or other evidence of such payment  reasonably
satisfactory to the Administrative Agent.

          (e) Any  Foreign  Lender  that is  entitled  to an  exemption  from or
reduction  of  withholding  tax under the law of the  jurisdiction  in which the
Borrower is located,  or any treaty to which such  jurisdiction is a party, with
respect to payments under this  Agreement  shall deliver to the Borrower (with a
copy to the Administrative Agent), at the time or times prescribed by applicable
law, such properly completed and executed documentation prescribed by applicable
law or  reasonably  requested by the Borrower as will permit such payments to be
made without withholding or at a reduced rate.

          (f) Upon the Borrower's written request,  the Administrative Agent and
each Lender shall use reasonable efforts to make any filings necessary to obtain
any  refund,  deduction  or credit  of any Taxes or Other  Taxes as to which the
Borrower  has  indemnified  it or with  respect to which the  Borrower  has paid
additional amounts pursuant to this Section 2.17. If the Administrative Agent or
a Lender receives any material refund of any Taxes or Other Taxes as to which it
has been  indemnified  by the Borrower or with respect to which the Borrower has
paid  additional  amounts  pursuant to this Section 2.17, it shall pay over such
refund to the Borrower  (but only to the extent of indemnity  payments  made, or
additional amounts paid, by the Borrower under this Section 2.17 with respect to
the Taxes or Other Taxes  giving  rise to such  refund),  net of all  reasonable
out-of-pocket  expenses of the  Administrative  Agent or such Lender and without
interest  (other than any interest paid by the relevant  Governmental  Authority
with respect to such refund);  provided,  that the Borrower, upon the request of
the Administrative Agent or such Lender, agrees to repay the amount paid over to
the  Borrower  (plus any  penalties,  interest or other  charges  imposed by the
relevant  Governmental  Authority) to the Administrative Agent or such Lender in
the event the  Administrative  Agent or such  Lender is  required  to repay such
refund to such  Governmental  Authority.  This Section shall not be construed to
require the Administrative Agent or any Lender to make available its tax returns
(or any other information  relating to its taxes which it deems confidential) to
the  Borrower or any other Person or to attempt to take any position to obtain a


                                       25
                            364-DAY CREDIT AGREEMENT






refund,  deduction,  or credit,  which  attempt would be  inconsistent  with any
reporting position otherwise taken by the Administrative Agent or such Lender on
its applicable tax returns.

     Section 2.18  Payments Generally; Pro Rata Treatment; Sharing of Set-offs.

          (a) The Borrower  shall make  each payment  required to  be made by it
hereunder (whether of principal,  interest, or fees, or of amounts payable under
Section 2.15,  2.16 or 2.17, or  otherwise)  prior to 12:00 noon,  New York City
time, on the date when due, in immediately  available funds,  without set-off or
counterclaim.  Any  amounts  received  after  such time on any date may,  in the
discretion of the  Administrative  Agent, be deemed to have been received on the
next succeeding Business Day for purposes of calculating  interest thereon.  All
such payments  shall be made to the  Administrative  Agent at its offices at 270
Park Avenue,  New York, New York,  except that payments pursuant to Section 9.03
shall be made directly to the Persons entitled thereto. The Administrative Agent
shall  distribute any such payments  received by it for the account of any other
Person to the appropriate  recipient promptly following receipt thereof.  If any
payment hereunder shall be due on a day that is not a Business Day, the date for
payment shall be extended to the next succeeding  Business Day, and, in the case
of any payment  accruing  interest,  interest  thereon  shall be payable for the
period of such extension. All payments hereunder shall be made in dollars.

          (b) If at any time insufficient funds are received by and available to
the  Administrative  Agent to pay fully all amounts of  principal,  interest and
fees then due hereunder,  such funds shall be applied (i) first, towards payment
of interest  and fees then due  hereunder,  ratably  among the parties  entitled
thereto in  accordance  with the amounts of  interest  and fees then due to such
parties,  and (ii)  second,  towards  payment of principal  then due  hereunder,
ratably among the parties  entitled  thereto in  accordance  with the amounts of
principal then due to such parties.

          (c) If  any  Lender  shall,  by  exercising  any  right  of set-off or
counterclaim  or  otherwise,  obtain  payment in respect of any  principal of or
interest on any of its Loans  resulting  in such Lender  receiving  payment of a
greater  proportion  of the aggregate  amount of its Loans and accrued  interest
thereon  than the  proportion  received  by any other  Lender,  then the  Lender
receiving  such  greater  proportion  shall  purchase  (for cash at face  value)
participations in the Loans of other Lenders to the extent necessary so that the
benefit  of all  such  payments  shall  be  shared  by the  Lenders  ratably  in
accordance  with the  aggregate  amount of principal of and accrued  interest on
their  respective  Loans;  provided  that  (i) if any  such  participations  are
purchased  and  all or any  portion  of  the  payment  giving  rise  thereto  is
recovered,  such  participations  shall  be  rescinded  and the  purchase  price
restored  to the  extent  of such  recovery,  without  interest,  and  (ii)  the
provisions of this paragraph shall not be construed to apply to any payment made
by the Borrower  pursuant to and in  accordance  with the express  terms of this
Agreement  or  any  payment  obtained  by a  Lender  as  consideration  for  the
assignment of or sale of a participation  in any of its Loans to any assignee or
participant,  other than to the Borrower or any Subsidiary or Affiliate  thereof
(as to which  the  provisions  of this  paragraph  shall  apply).  The  Borrower
consents to the foregoing  and agrees,  to the extent it may  effectively  do so
under applicable law, that any Lender acquiring a participation  pursuant to the
foregoing  arrangements  may exercise against the Borrower rights of set-off and

                                       26
                            364-DAY CREDIT AGREEMENT






counterclaim with respect to such  participation as fully as if such Lender were
a direct creditor of the Borrower in the amount of such participation.

          (d) Unless the  Administrative Agent  shall have  received notice from
the Borrower prior to the date on which any payment is due to the Administrative
Agent for the account of the Lenders  hereunder  that the Borrower will not make
such  payment,  the  Administrative  Agent may assume that the Borrower has made
such payment on such date in accordance  herewith and may, in reliance upon such
assumption,  distribute  to the Lenders  the amount  due. In such event,  if the
Borrower has not in fact made such payment,  then each of the Lenders  severally
agrees to repay to the  Administrative  Agent  forthwith on demand the amount so
distributed  to such  Lender  with  interest  thereon,  for  each  day  from and
including the date such amount is distributed to it to but excluding the date of
payment  to the  Administrative  Agent,  at the  greater  of the  Federal  Funds
Effective Rate and a rate determined by the  Administrative  Agent in accordance
with banking industry rules on interbank compensation.

          (e) If any Lender  shall fail to make  any payment required to be made
by it pursuant to Section 2.07(b) or 2.18(d), then the Administrative Agent may,
in its discretion  (notwithstanding  any contrary provision  hereof),  apply any
amounts thereafter received by the Administrative  Agent for the account of such
Lender to satisfy such Lender's  obligations  under such Sections until all such
unsatisfied obligations are fully paid.

     Section 2.19  Mitigation Obligations; Replacement of Lenders.

          (a) If any Lender requests compensation under Section 2.15,  or if the
Borrower  is  required  to  pay  any  additional  amount  to any  Lender  or any
Governmental  Authority for the account of any Lender  pursuant to Section 2.17,
then such Lender shall use reasonable  efforts to designate a different  lending
office for  funding or booking its Loans  hereunder  or to assign its rights and
obligations hereunder to another of its offices, branches or affiliates,  if, in
the judgment of such Lender,  such designation or assignment (i) would eliminate
or reduce amounts payable  pursuant to Section 2.15 or 2.17, as the case may be,
in the future and (ii) would not subject such Lender to any unreimbursed cost or
expense and would not otherwise be  disadvantageous to such Lender. The Borrower
hereby agrees to pay all reasonable costs and expenses incurred by any Lender in
connection with any such designation or assignment.

          (b) If any Lender requests  compensation under Section 2.15, or if the
Borrower  is  required  to  pay  any  additional  amount  to any  Lender  or any
Governmental  Authority for the account of any Lender  pursuant to Section 2.17,
or if any Lender  defaults in its obligation to fund Loans  hereunder,  then the
Borrower may, at its sole expense and effort, upon notice to such Lender and the
Administrative  Agent,  require  such  Lender to assign  and  delegate,  without
recourse  (in  accordance  with and  subject to the  restrictions  contained  in
Section 9.04), all its interests, rights and obligations under this Agreement to
an assignee that shall assume such  obligations  (which  assignee may be another
Lender,  if a Lender  accepts such  assignment);  provided that (i) the Borrower
shall have received the prior written consent of the Administrative  Agent which
consent shall not unreasonably be withheld, (ii) such Lender shall have received
payment of an amount equal to the  outstanding  principal of its Loans,  accrued
interest  thereon,  accrued fees and all other amounts  payable to it hereunder,
from the  assignee  (to the extent of such  outstanding  principal  and  accrued
interest and fees) or the Borrower (in the case of all other  amounts) and (iii)



                                       27
                            364-DAY CREDIT AGREEMENT





in the case of any such assignment resulting from a claim for compensation under
Section  2.15 or payments  required to be made  pursuant to Section  2.17,  such
assignment will result in a reduction in such compensation or payments. A Lender
shall not be required  to make any such  assignment  and  delegation  if,  prior
thereto, as a result of a waiver by such Lender or otherwise,  the circumstances
entitling the Borrower to require such assignment and delegation cease to apply.

                                  ARTICLE III
                         REPRESENTATIONS AND WARRANTIES

     The Borrower represents and warrants to the Lenders that:

     Section 3.01 Organization;  Powers. Each of the Borrower and its Restricted
Subsidiaries is duly organized,  validly existing and in good standing under the
laws of the  jurisdiction  of its  organization,  has all  requisite  power  and
authority  to carry on its  business  as now  conducted  and,  except  where the
failure to do so,  individually  or in the  aggregate,  could not  reasonably be
expected to result in a Material Adverse Effect, is qualified to do business in,
and is in good  standing  in, every  jurisdiction  where such  qualification  is
required.

     Section 3.02  Authorization;  Enforceability.  The  Transactions are within
each Obligor's  corporate  powers and have been duly authorized by all necessary
corporate  and,  if  required,   stockholder  action.  This  Agreement  and  all
Subsidiary  Guaranties,  if any,  have been duly  executed and  delivered by the
Obligor,  which is a party thereto,  and  constitute a legal,  valid and binding
obligation of such Obligor,  enforceable in accordance with their terms, subject
to applicable bankruptcy, insolvency,  reorganization,  moratorium or other laws
affecting  creditors'  rights  generally  and subject to general  principles  of
equity, regardless of whether considered in a proceeding in equity or at law.

     Section 3.03 Governmental Approvals; No Conflicts.  The Transactions (a) do
not  violate  the  charter,  by-laws or other  organizational  documents  of the
Borrower or any of its Restricted  Subsidiaries or (b) except as to matters that
could not reasonably be expected to result in a Material Adverse Effect,  (i) do
not require any consent or approval  of,  registration  or filing  with,  or any
other action by, any Governmental  Authority,  except such as have been obtained
or made and are in full force and effect,  (ii) will not violate any  applicable
law or regulation  or any order of any  Governmental  Authority,  (iii) will not
violate  or  result  in a  default  under  any  indenture,  agreement  or  other
instrument  binding upon the Borrower or any of its Restricted  Subsidiaries  or
its assets, or give rise to a right thereunder to require any payment to be made
by the Borrower or any of its Restricted Subsidiaries,  and (iv) will not result
in the creation or imposition of any Lien on any asset of the Borrower or any of
its Restricted Subsidiaries.

     Section 3.04  Financial Condition; No Material Adverse Change.

          (a)  The  Borrower   has  heretofore  furnished  to  the  Lenders  its
consolidated  balance sheet and statements of income,  stockholders'  equity and
cash flows (i) as of and for the fiscal year ended  December 31, 2003,  reported
on by Ernst & Young LLP,  independent public accountants,  and as of and for the
fiscal quarter and the portion of the fiscal year ended June 30, 2004, certified
by its Financial  Officer.  Such financial  statements  present  fairly,  in all



                                       28
                            364-DAY CREDIT AGREEMENT





material  respects,  the financial  position and results of operations  and cash
flows of the Borrower and its consolidated Subsidiaries as of such dates and for
such periods in accordance with GAAP,  subject to year-end audit adjustments and
the absence of  footnotes  in the case of the  statements  referred to in clause
(ii) above.

          (b) Since December 31, 2003, through and including the Effective Date,
there has been no change which could  reasonably  be expected to have a Material
Adverse Effect.

     Section  3.05   Properties.   Each  of  the  Borrower  and  its  Restricted
Subsidiaries  has good title to, or valid  leasehold  interests in, all its real
and personal property material to its business,  except for any failure,  defect
or other matter that could not, in the aggregate, reasonably be expected to have
a Material Adverse Effect.

     Section 3.06  Litigation and Environmental Matters.

          (a) There  are  no  actions,  suits  or  proceedings by or  before any
arbitrator or Governmental Authority pending against or, to the knowledge of the
Borrower,   threatened   against  or  affecting  the  Borrower  or  any  of  its
Subsidiaries  that  could  reasonably  be  expected,   individually  or  in  the
aggregate,  to result in a Material  Adverse  Effect  (other than the  Disclosed
Matters)  or, as of the  Effective  Date,  that  involve  this  Agreement or the
Transactions.

          (b) Except for the  Disclosed Matters  and except  with respect to any
other matters that,  individually  or in the aggregate,  could not reasonably be
expected to result in a Material Adverse Effect, neither the Borrower nor any of
its  Subsidiaries  (i) has  failed to comply  with any  Environmental  Law or to
obtain,  maintain or comply with any permit,  license or other approval required
under any  Environmental  Law,  (ii) has  become  subject  to any  Environmental
Liability,  (iii)  has  received  notice  of  any  claim  with  respect  to  any
Environmental  Liability  or (iv)  knows  of any  basis  for  any  Environmental
Liability.

     Section 3.07  Compliance with Laws. Each of the Borrower and its Restricted
Subsidiaries  is in  compliance  with all laws,  regulations  and  orders of any
Governmental Authority applicable to it or its property except where the failure
to do so, individually or in the aggregate,  could not reasonably be expected to
result in a Material Adverse Effect. No Default has occurred and is continuing.

     Section 3.08 Investment and Holding  Company  Status.  Neither the Borrower
nor any of its  Subsidiaries  is (a) an  "investment  company" as defined in, or
subject  to  regulation  under,  the  Investment  Company  Act of  1940 or (b) a
"holding  company" as defined  in, or subject to  regulation  under,  the Public
Utility Holding Company Act of 1935.

     Section 3.09 Taxes.  Each of the Borrower and its  Restricted  Subsidiaries
has timely  filed or caused to be filed all Tax returns and reports  required to
have been  filed and has paid or  caused to be paid all Taxes  required  to have
been paid by it,  except  (a) Taxes for which the  Borrower  or such  Restricted
Subsidiary,  as  applicable,  has  set  aside  on its  books  adequate  reserves
including,  Taxes  that  are  being  contested  in  good  faith  by  appropriate
proceedings  or (b) to the extent that the failure to do so could not reasonably
be expected to result in a Material Adverse Effect.



                                       29
                            364-DAY CREDIT AGREEMENT






     Section 3.10 ERISA.  No ERISA Event has occurred or is reasonably  expected
to occur that,  when taken  together  with all other such ERISA Events for which
liability  is  reasonably  expected to occur,  could  reasonably  be expected to
result in a Material  Adverse Effect.  The Borrower and each ERISA Affiliate has
fulfilled its obligations  under the minimum funding  standards of ERISA and the
Code with respect to each Plan and is in  compliance  in all  material  respects
with the presently  applicable  provisions of ERISA and the Code with respect to
each Plan.  Neither the Borrower nor any ERISA Affiliate has (a) sought a waiver
of the minimum funding  standard under Section 412 of the Code in respect of any
Plan,  (b)  failed  to  make  any   contribution  or  payment  to  any  Plan  or
Multiemployer Plan, or made any amendment to any Plan that has resulted or could
result in the  imposition  of a Lien or the posting of a bond or other  security
under ERISA or the Code, or (c) incurred any  liability  under Title IV of ERISA
other than a liability to the PBGC for premiums under Section 4007 of ERISA that
are not past due.

     Section 3.11 Disclosure.  The information  furnished by or on behalf of the
Borrower  to the  Administrative  Agent or any  Lender  in  connection  with the
negotiation   of  this   Agreement  or  delivered   hereunder  (as  modified  or
supplemented by other information so furnished),  taken as a whole,  contains no
material  misstatement of fact nor omits to state any material fact necessary to
make the statements  therein, in the light of the circumstances under which they
were made, not materially  misleading;  provided that, with respect to projected
financial  information,  the Borrower  represents only that such information was
prepared in good faith based upon  assumptions  believed to be reasonable at the
time.

     Section  3.12  Subsidiary  Guarantees.  No  Subsidiary  is a  party  to any
Guarantee of any Indebtedness included in the definition of Total Adjusted Debt,
except in compliance with Section 6.05(b).

                                   ARTICLE IV
                                   CONDITIONS

     Section 4.01 Effective  Date. The  obligations of the Lenders to make Loans
hereunder  shall  not  become  effective  until  the date on  which  each of the
following conditions is satisfied (or waived in accordance with Section 9.02):

          (a) The Administrative Agent (or its counsel) shall have received from
each party hereto either (i) a counterpart of this Agreement signed on behalf of
such party or (ii) written  evidence  satisfactory to the  Administrative  Agent
(which may include  telecopy  transmission  of a signed  signature  page of this
Agreement) that such party has signed a counterpart of this Agreement.

          (b) The Administrative Agent  shall have  received  favorable  written
opinions  (addressed to the  Administrative  Agent and the Lenders and dated the
Effective  Date)  of Mark  Withrow,  general  counsel  of the  Borrower,  and of
Thompson  &  Knight,  LLP,  outside  counsel  for the  Borrower  and  Subsidiary
Guarantor,  covering those matters  described on Exhibit B. The Borrower  hereby
requests such counsels to deliver such opinions.

          (c) The Administrative Agent  shall have  received such  documents and
certificates as the  Administrative  Agent or its counsel may reasonably request
relating to the organization,  existence and good standing of the Borrower,  the



                                       30
                            364-DAY CREDIT AGREEMENT





authorization  of the  Transactions  and any other legal matters relating to the
Borrower,  this  Agreement  or the  Transactions,  all  in  form  and  substance
satisfactory to the Administrative Agent and its counsel.

          (d) The Administrative Agent shall have received a certificate,  dated
the Effective Date and signed by the President,  a Vice President or a Financial
Officer of the Borrower,  confirming compliance with the conditions set forth in
paragraphs (a), (b) and (c) of Section 4.02.

          (e) The Administrative Agent, Lenders and the Lead Arranger shall have
received all fees and other amounts due and payable on or prior to the Effective
Date,  including,  to the  extent  invoiced,  reimbursement  or  payment  of all
out-of-pocket  expenses  required  to be  reimbursed  or  paid  by the  Borrower
hereunder.

     The  Administrative  Agent shall notify the Borrower and the Lenders of the
Effective Date, and such notice shall be conclusive and binding. Notwithstanding
the foregoing,  the obligations of the Lenders to make Loans hereunder shall not
become effective unless each of the foregoing conditions is satisfied (or waived
pursuant  to  Section  9.02) at or prior to 3:00 p.m.,  New York City  time,  on
December  31, 2004 (and,  in the event such  conditions  are not so satisfied or
waived, the Commitments shall terminate at such time).

     Section 4.02 Each Credit  Event.  The  obligation  of each Lender to make a
Loan on the  occasion of any  Borrowing  is subject to the  satisfaction  of the
following conditions:

          (a) The  representations and  warranties of  the Borrower set forth in
this  Agreement and of the  Subsidiary  Guarantors  set forth in the  Subsidiary
Guaranties,  if any,  shall  be true and  correct  on and as of the date of such
Borrowing.

          (b) At  the  time  of  and  immediately  after  giving  effect to such
Borrowing no Default shall have occurred and be continuing.

          (c) Prior to the Mid-Investment Grade Date,  there has been  no change
since December 31, 2003 that has resulted in a Material  Adverse Effect which is
continuing.

     Each Borrowing shall be deemed to constitute a representation  and warranty
by the  Borrower on the date thereof as to the matters  specified in  paragraphs
(a), (b) and, prior to the Mid-Investment Grade Date, (c) of this Section 4.02.

                                   ARTICLE V
                              AFFIRMATIVE COVENANTS

         Until the Commitments have expired or been terminated and the principal
of and interest on each Loan and all fees payable hereunder shall have been paid
in full the Borrower covenants and agrees with the Lenders that:

     Section 5.01 Financial Statements and Other Information.  The Borrower will
furnish to the Administrative Agent and each Lender:



                                       31
                            364-DAY CREDIT AGREEMENT






          (a) within 90 days after the end of each  fiscal year of the Borrower,
its audited  consolidated  balance sheet and related  statements of  operations,
stockholders'  equity and cash flows as of the end of and for such year, setting
forth in each case in comparative form the figures for the previous fiscal year,
all  reported  on by  independent  public  accountants  of  recognized  national
standing  (without a "going concern" or like  qualification or exception) to the
effect  that  such  consolidated  financial  statements  present  fairly  in all
material  respects the  financial  condition  and results of  operations  of the
Borrower and its consolidated Subsidiaries on a consolidated basis in accordance
with GAAP consistently applied;

          (b) within 45 days  after the  end of  each of  the first three fiscal
quarters of each fiscal year of the Borrower, its consolidated balance sheet and
related statements of operations,  stockholders' equity and cash flows as of the
end of and for such fiscal  quarter and the then  elapsed  portion of the fiscal
year,  setting  forth  in each  case in  comparative  form the  figures  for the
corresponding  period or periods of (or, in the case of the balance sheet, as of
the end of) the previous  fiscal year prepared on a basis  consistent  with that
used on Form 10Q as required by the  Securities  and  Exchange  Commission,  all
certified by one of its Financial  Officers as presenting fairly in all material
respects the  financial  condition and results of operations of the Borrower and
its  consolidated  Subsidiaries on a consolidated  basis in accordance with GAAP
consistently  applied,  subject to normal  year-end  audit  adjustments  and the
absence of footnotes;

          (c) simultaneously  with  the  delivery  of the  financial  statements
referred  to in  subsections  (a) or (b) of  this  Section  5.01,  a copy of the
certification  signed  by the  principal  executive  officer  and the  principal
financial officer of the Borrower (each, a "Certifying  Officer") as required by
Rule 13A-14 under the Securities Exchange Act of 1934 and a copy of the internal
controls  disclosure  statement by such Certifying  Officers as required by Rule
13A-15 under the  Securities  Exchange  Act of 1934 and Final Rules  Release No.
33-8238  of the  United  States  Securities  and  Exchange  Commission,  each as
included in the  Borrower's  Annual  Report on Form 10-K or Quarterly  Report on
Form 10-Q, for the applicable fiscal period;

          (d) concurrently  with  any  delivery of  financial  statements  under
subsections  (a) or (b) of this  Section  5.01,  a  certificate  of a  Financial
Officer of the Borrower (i) certifying as to whether a Default has occurred and,
if a Default has occurred,  specifying the details  thereof and any action taken
or proposed to be taken with respect thereto,  and (ii) setting forth reasonably
detailed calculations demonstrating compliance with Section 6.04(a) and (b);

          (e) promptly after  the same become publicly available,  copies of all
periodic and other reports,  proxy  statements and other  materials filed by the
Borrower or any Subsidiary with the Securities and Exchange  Commission,  or any
Governmental  Authority  succeeding  to any or all  of  the  functions  of  said
Commission,  or with any national  securities  exchange,  or  distributed by the
Borrower to its shareholders generally, as the case may be;

          (f) promptly after Moody's or S&P shall have announced a change in the
rating  established  or  deemed  to have been  established  for the Index  Debt,
written notice of such rating change; and



                                       32
                            364-DAY CREDIT AGREEMENT





          (g) promptly  following any  request therefor,  such other information
regarding  the  operations,  business  affairs and  financial  condition  of the
Borrower or any Subsidiary,  or compliance with the terms of this Agreement,  as
the Administrative Agent or any Lender may reasonably request.

     Section 5.02 Notices of Material  Events.  The Borrower will furnish to the
Administrative Agent and each Lender prompt written notice of the following:

          (a) the occurrence of any Default;

          (b) the filing or commencement of any action, suit or proceeding by or
before  any  arbitrator  or  Governmental  Authority  against or  affecting  the
Borrower or any Affiliate thereof that could reasonably be expected to result in
a Material Adverse Effect if adversely determined;

          (c) the occurrence of any ERISA Event that, alone or together with any
other ERISA Events that have occurred, could reasonably be expected to result in
liability of the Borrower  and its Subsidiaries in an aggregate amount exceeding
$25,000,000; and

          (d) any  other development  that  results in,  or could  reasonably be
expected to result in, a Material Adverse Effect.

     Each  notice  delivered  under  this  Section  shall  be  accompanied  by a
statement of a Financial  Officer of the Borrower  setting  forth the details of
the event or development  requiring such notice and any action taken or proposed
to be taken with respect thereto.

     Section 5.03  Existence;  Conduct of Business.  The Borrower will, and will
cause each of its Restricted  Subsidiaries to, do or cause to be done all things
necessary  to  preserve,  renew  and keep in full  force  and  effect  its legal
existence and the rights, licenses,  permits, privileges and franchises material
to the conduct of its business  except for any failure to maintain,  preserve or
qualify that could not reasonably be expected to have a Material Adverse Effect;
provided  that the foregoing  shall not prohibit (i) any merger,  consolidation,
liquidation or dissolution permitted under Section 6.03 or (ii) a termination of
such  existence,  good  standing,  rights  licenses,   permits,  privileges  and
franchises of any  Restricted  Subsidiary  if Borrower  determines in good faith
that  such  termination  is in the best  interest  of  Borrower  and  could  not
reasonably be expected to have a Material Adverse Effect.

     Section 5.04 Payment of Obligations. The Borrower will, and will cause each
of its Subsidiaries to, pay its obligations, including Tax liabilities, that, if
not paid,  could  reasonably be expected to result in a Material  Adverse Effect
before the same shall  become  delinquent  or in default,  except  where (a) the
validity  or amount  thereof is being  contested  in good  faith by  appropriate
proceedings,  and (b) the Borrower or such Subsidiary has set aside on its books
adequate reserves with respect thereto in accordance with GAAP.

     Section 5.05 Maintenance of Properties;  Insurance.  The Borrower will, and
will cause each of its  Restricted  Subsidiaries  to, (a) keep and  maintain all
property  material to the  conduct of its  business  in good  working  order and
condition,  ordinary wear and tear  excepted,  except for any failure that could
reasonably be expected to result in a Material  Adverse Effect and (b) maintain,



                                       33
                            364-DAY CREDIT AGREEMENT





with  financially  sound and reputable  insurance  companies,  insurance in such
amounts  and  against  such risks as are  customarily  maintained  by  companies
engaged  in the same or  similar  businesses  operating  in the same or  similar
locations.

     Section 5.06 Books and Records;  Inspection  Rights. The Borrower will, and
will cause each of its  Subsidiaries to, keep proper books of record and account
in  which  full,  true  and  correct  entries  are  made  of  all  dealings  and
transactions in relation to its business and activities.  The Borrower will, and
will cause each of its Restricted  Subsidiaries  to, permit any  representatives
designated by the  Administrative  Agent or any Lender,  upon  reasonable  prior
notice,  to visit and inspect its properties,  to examine and make extracts from
its books and records,  and to discuss its affairs,  finances and condition with
its officers and independent  accountants,  all at such reasonable  times and as
often as reasonably requested.

     Section 5.07  Compliance  with Laws. The Borrower will, and will cause each
of its Subsidiaries to, comply with all laws,  rules,  regulations and orders of
any Governmental  Authority  applicable to it or its property,  except where the
failure to do so,  individually  or in the  aggregate,  could not  reasonably be
expected to result in a Material Adverse Effect.

     Section  5.08 Use of  Proceeds.  The proceeds of the Loans will be used for
general  corporate  purposes.  No part of the proceeds of any Loan will be used,
whether directly or indirectly,  for any purpose that entails a violation of any
of the Regulations of the Board, including Regulations T, U and X.

     Section 5.09  Operations.  Borrower  will,  and will cause each  Restricted
Subsidiary to, maintain as its primary business the exploration,  production and
development of oil,  natural gas and other liquid and gaseous  Hydrocarbons  and
the  gathering,  processing,  transmission  and  marketing of  Hydrocarbons  and
activities related or ancillary thereto.

                                   ARTICLE VI
                               NEGATIVE COVENANTS

     Until the  Commitments  have expired or terminated and the principal of and
interest on each Loan and all fees payable hereunder have been paid in full, the
Borrower covenants and agrees with the Lenders that:

     Section 6.01  Indebtedness.

          (a) The  Borrower  will  not,  and  will  not  permit  any  Restricted
Subsidiary to, create,  incur, assume or permit to exist (collectively  "incur")
any Indebtedness if the Borrower would be in breach of any covenant set forth in
Section 6.04 as a result of such incurrence.

          (b) The Borrower  will not  permit any  Restricted Subsidiary to incur
Indebtedness  included in the definition of Total  Adjusted Debt  (including for
this purpose, the amount of such Indebtedness of the Borrower that is Guaranteed
by one or  more  Restricted  Subsidiaries)  except  for  (i)  such  Indebtedness
consisting of  obligations,  contingent  or otherwise,  in respect of letters of
credit outstanding at such time for all Restricted  Subsidiaries in an aggregate
amount not exceeding  $50,000,000  and (ii) other such  Indebtedness  (including
without limitation,  obligations, contingent or otherwise, in respect of letters

                                       34
                            364-DAY CREDIT AGREEMENT






of credit  in  excess of the  amount  permitted  by clause  (i) of this  Section
6.01(b))  outstanding  at  such  time  for  all  Restricted  Subsidiaries  in an
aggregate amount not exceeding $150,000,000.

     Section  6.02  Liens.  The  Borrower  will  not,  and will not  permit  any
Restricted  Subsidiary to, create,  incur, assume or permit to exist any Lien on
any property or asset now owned or  hereafter  acquired by it, or assign or sell
any income or revenues (including  accounts  receivable) or rights in respect of
any thereof, except:

          (a) Permitted Encumbrances;

          (b) any  Lien  on  any  property  or  asset of  the  Borrower  or  any
Restricted  Subsidiary  existing  on the date  hereof and set forth in  Schedule
6.02; provided that (i) such Lien shall not apply to any other property or asset
of the  Borrower or any  Restricted  Subsidiary  and (ii) such Lien shall secure
only  those  obligations  which it secures  on the date  hereof and  extensions,
renewals and replacements thereof that do not increase the outstanding principal
amount thereof;

          (c) any   Lien  on  any  property  or  asset  existing  prior  to  the
acquisition  thereof by the  Borrower or any  Subsidiary  or on any  property or
asset of any Person that  becomes a  Subsidiary  after the date hereof  existing
prior to the time such Person becomes a Restricted Subsidiary; provided that (i)
such  Lien  is not  created  in  contemplation  of or in  connection  with  such
acquisition or such Person becoming a Subsidiary,  as the case may be, (ii) such
Lien  shall not apply to any other  property  or assets of the  Borrower  or any
Restricted  Subsidiary,  and (iii) such Lien shall secure only those obligations
which it secures on the date of such acquisition or the date such Person becomes
a  Subsidiary,  as the case may be and  extensions,  renewals  and  replacements
thereof that do not increase the outstanding principal amount thereof;

          (d) Liens  created in  connection with  the acquisition,  development,
construction  or  improvement  by the Borrower or any  Restricted  Subsidiary of
fixed or  capital  assets;  provided  that (i) such  Liens  secure  Indebtedness
permitted by Section  6.01 and all  Indebtedness  secured by Liens  permitted by
this clause does not exceed  $100,000,000  in the aggregate  outstanding  at any
time, (ii) such Liens and the Indebtedness secured thereby are incurred prior to
or within 180 days after such acquisition or the completion of such development,
construction or  improvement,  (iii) the  Indebtedness  secured thereby does not
exceed 100% of the cost of acquiring, developing, constructing or improving such
fixed or capital  assets and (iv) such Liens shall not apply to any  property or
assets of the  Borrower or any  Restricted  Subsidiary  other than such fixed or
capital assets so acquired,  developed,  constructed or improved and other fixed
or capital assets that are developed or improved thereby or otherwise reasonably
related  thereto (in the good faith  determination  of the Borrower) and working
capital assets related  thereto  (including but not limited to revenue from, and
insurance,  condemnation,  sale and other proceeds of, any such fixed or capital
assets); and extensions,  renewals and replacements thereof that do not increase
the outstanding principal amount thereof.

          (e) Liens securing obligations owing under this Agreement; and


                                       35
                            364-DAY CREDIT AGREEMENT






          (f) Liens on deposits pursuant  to any  Swap Agreement entered into by
the  Borrower  or any  Restricted  Subsidiary  in  the  ordinary  course  of its
business,  not to exceed $100,000,000 in the aggregate amount outstanding at any
time.

     Section 6.03  Fundamental Changes.

          (a) The  Borrower  will  not,  and  will  not  permit  any  Subsidiary
Guarantor to, merge into or  consolidate  with any other  Person,  or permit any
other  Person to merge into or  consolidate  with it or  liquidate  or dissolve,
except that, if at the time thereof and immediately  after giving effect thereto
no Default shall have occurred and be continuing,  (i) any Subsidiary Guarantors
may merge  into the  Borrower  in a  transaction  in which the  Borrower  is the
surviving corporation,  (ii) any Person may merge into any Subsidiary Guarantors
in a transaction  in which the  surviving  entity is a  wholly-owned  Subsidiary
Guarantor,  (iii) any Person may merge into the  Borrower  in a  transaction  in
which the surviving  entity is the Borrower and (iv) any  Subsidiary  Guarantors
may  liquidate  or dissolve if the Borrower  determines  in good faith that such
liquidation  or  dissolution is in the best interests of the Borrower and is not
materially disadvantageous to the Lenders.

          (b) The Borrower will not sell,  transfer,  lease or otherwise dispose
of (in one transaction or in a series of transactions)  all or substantially all
of its  assets,  or all or  substantially  all of the  stock  of the  Subsidiary
Guarantors (in each case, whether now owned or hereafter acquired) other than to
another Subsidiary Guarantor.

     Section 6.04  Financial Covenants.

          (a) The Borrower shall  not permit,  at any time,  the ratio  of Total
Debt to Total Cap to be greater than 0.60 to 1.0.

          (b) The Borrower will not permit, as of the end of any fiscal quarter,
the ratio of the Borrower's  Consolidated  EBITDAX to its Consolidated  Interest
Expense for the four fiscal  quarters ending on such date to be less than 3.5 to
1.0.

     Section 6.05  Investments, Loans, Advances, Guarantees and Acquisitions.

          (a) The Borrower will not,  and will not  permit any of its Restricted
Subsidiaries to make any loans or advances to,  Guarantee any obligations of, or
make any  investment  or any other  interest in, any  Unrestricted  Subsidiaries
except  that the  Borrower  or any  Restricted  Subsidiaries  may make  loans or
advances to, or investments or other interests in  Unrestricted  Subsidiaries if
at the time of the making of such loan,  advance,  investment or other  interest
the aggregate  book value of assets (plus the  aggregate  amount of any non-cash
write downs therein under Statements of Financial  Accounting  Standard Nos. 19,
109, 142 and 144 (and any statements  replacing,  modifying,  or superceding any
such Statement) after December 31, 2002, net of associate taxes) of the Borrower
and its Restricted  Subsidiaries on a consolidated basis (excluding  investments
in Unrestricted Subsidiaries) exceeds $2,750,000,000.

          (b) No Subsidiary  shall Guarantee  any Indebtedness  included  in the
definition  of Total  Adjusted  Debt,  except for  Indebtedness  of a Restricted
Subsidiary  permitted by Section  6.01(b),  unless it shall have  previously  or
concurrently  therewith  executed  and  delivered a  Subsidiary  Guaranty to the


                                       36
                            364-DAY CREDIT AGREEMENT






Administrative  Agent together with the items in Sections  4.01(b) and (c) as to
such Subsidiary Guarantor and the Subsidiary Guaranty.

     Section 6.06 Swap  Agreements.  The Borrower  will not, and will not permit
any of its Restricted Subsidiaries to, enter into any Swap Agreement, except (a)
Swap Agreements entered into to hedge or mitigate risks to which the Borrower or
any Restricted  Subsidiary has actual or projected exposure (other than those in
respect of Equity  Interests  of the Borrower or any of its  Subsidiaries),  (b)
Swap  Agreements  entered into in order to effectively  cap,  collar or exchange
interest rates (from fixed to floating rates,  from one floating rate to another
floating rate or otherwise)  with respect to any  interest-bearing  liability or
investment  of the  Borrower  or any  Restricted  Subsidiary  and (c) other Swap
Agreements  permitted  under  the  risk  management  policies  approved  by  the
Borrower's  Board of Directors from time to time and not subjecting the Borrower
and its Restricted Subsidiaries to material speculative risks.

     Section 6.07 Transactions with Affiliates.  The Borrower will not, and will
not permit any of its  Restricted  Subsidiaries  to,  sell,  lease or  otherwise
transfer any property or assets to, or purchase,  lease or otherwise acquire any
property or assets from, or otherwise engage in any other transactions with, any
of its Affiliates,  except (a) transfers on fair and reasonable  terms,  and (b)
transactions  between  or among the  Borrower  and its  wholly-owned  Restricted
Subsidiaries not involving any other Affiliate.

     Section 6.08  Restrictive  Agreements.  The Borrower will not, and will not
permit any of its Restricted  Subsidiaries  to,  directly or  indirectly,  enter
into,  incur or  permit  to  exist  any  agreement  or  other  arrangement  that
prohibits, restricts or imposes any condition upon the ability of any Restricted
Subsidiary to pay dividends or other distributions with respect to any shares of
its capital  stock or to make or repay loans or advances to the  Borrower or any
other Restricted Subsidiary or to Guarantee  Indebtedness of the Borrower or any
other Restricted Subsidiary;  provided that (i) the foregoing shall not apply to
restrictions  and  conditions  imposed  by law or by this  Agreement,  (ii)  the
foregoing  shall not apply to restrictions  and conditions  existing on the date
hereof  identified on Schedule 6.08 (but shall apply to any extension or renewal
of,  or  any  amendment  or  modification  expanding  the  scope  of,  any  such
restriction or condition)  and (iii) the foregoing  shall not apply to customary
restrictions  and conditions  contained in agreements  relating to the sale of a
Subsidiary  pending such sale,  provided such  restrictions and conditions apply
only to the Subsidiary that is to be sold and such sale is permitted hereunder.

                                  ARTICLE VII
                                EVENTS OF DEFAULT

     If any of the following events ("Events of Default") shall occur:

          (a) the Borrower shall fail to  pay any principal of any Loan when and
as the same shall become due and payable,  whether at the due date thereof or at
a date fixed for prepayment thereof or otherwise;

          (b) the Borrower shall fail to pay any interest on any Loan or any fee
or any other  amount  (other  than an amount  referred  to in clause (a) of this


                                       37
                            364-DAY CREDIT AGREEMENT






Article VII) payable under this Agreement, when and as the same shall become due
and payable,  and such failure shall  continue  unremedied  for a period of five
days;

          (c) any representation or warranty made or deemed made by or on behalf
of the  Borrower  or any  Subsidiary  Guarantor  in or in  connection  with this
Agreement,  any Subsidiary  Guaranty,  if any, or any amendment or  modification
hereof  or  waiver  hereunder  or  thereunder,  or in any  report,  certificate,
financial  statement or other  document  furnished  pursuant to or in connection
with this  Agreement,  or  Subsidiary  Guaranty,  if any,  or any  amendment  or
modification  hereof or thereof or any waiver hereof or thereof,  shall prove to
have been incorrect in any material  respect when made or deemed made and either
(1)  an  Executive   Officer  of  Borrower  had  actual   knowledge   that  such
representation  or warranty was false or  incorrect  in a material  respect when
made or (2) if no Executive Officer had such knowledge,  such  representation or
warranty shall continue to be false or incorrect in any material  respect thirty
(30)  Business  Days after the  earlier  of an  Executive  Officer  of  Borrower
obtaining  actual  knowledge  thereof or written  notice thereof shall have been
sent to Borrower by Administrative Agent or by any Lender;

          (d) the  Borrower  shall  fail  to  observe  or  perform any covenant,
condition or agreement  contained in Section 5.02,  Section 5.03(with respect to
the Borrower's existence), or Section 5.08 or in Article VI;

          (e) the Borrower or any Subsidiary  Guarantor shall fail to observe or
perform any covenant,  condition or agreement contained in this Agreement or any
Subsidiary  Guaranty,  if any (other than those  specified in clause (a), (b) or
(d) of this Article  VII),  and such failure  shall  continue  unremedied  for a
period of thirty days after notice thereof from the Administrative  Agent to the
Borrower (which notice will be given at the request of any Lender);

          (f) the Borrower or any  Restricted Subsidiary  shall fail to make any
payment of principal or interest in respect of any Material  Indebtedness (other
than in respect of any Swap  Agreement),  when and as the same shall  become due
and  payable or any event or  condition  occurs  that  results  in any  Material
Indebtedness  (including in respect of any Swap Agreement) becoming due prior to
its  scheduled  maturity or that enables or permits the holder or holders of any
Material  Indebtedness  (other  than in  respect of any Swap  Agreement)  or any
trustee or agent on its or their behalf to cause such Material  Indebtedness  to
become due, or to require the prepayment,  repurchase,  redemption or defeasance
thereof,  prior to its scheduled maturity, and such event or condition continues
beyond any  applicable  period of grace  provided  therefor,  provided that this
clause (f) shall not apply to secured  Indebtedness that becomes due as a result
of the  voluntary  sale or transfer  of the  property  or assets  securing  such
Indebtedness to the extent such Indebtedness is paid when due;

          (g) any event or  condition occurs of the type customarily included as
an  event  of  default  under  International  Swap  Dealers  Association  master
agreements  (with respect to which the Borrower or any Restricted  Subsidiary is
the  defaulting  party)  that  enables or  permits  the holder or holders of any
Material  Indebtedness  under a Swap  Agreement to declare an early  termination
date or otherwise  cause such Material  Indebtedness  to become due prior to its
scheduled  maturity and such event or condition  continues beyond any applicable
period of grace provided therefor, except where such event or condition is being
contested in good faith;



                                       38
                            364-DAY CREDIT AGREEMENT






          (h) an  involuntary  proceeding shall  be commenced  or an involuntary
petition shall be filed seeking (i) liquidation,  reorganization or other relief
in respect of the Borrower or any  Restricted  Subsidiary or its debts,  or of a
substantial part of its assets, under any Federal,  state or foreign bankruptcy,
insolvency,  receivership  or similar law now or hereafter in effect or (ii) the
appointment  of a receiver,  trustee,  custodian,  sequestrator,  conservator or
similar  official  for  the  Borrower  or  any  Restricted  Subsidiary  or for a
substantial  part of its  assets,  and,  in any such case,  such  proceeding  or
petition shall continue  undismissed for 60 days or an order or decree approving
or ordering any of the foregoing shall be entered;

          (i) the  Borrower or  any Restricted  Subsidiary shall (i) voluntarily
commence any proceeding or file any petition seeking liquidation, reorganization
or other  relief  under any Federal,  state or foreign  bankruptcy,  insolvency,
receivership  or similar law now or  hereafter  in effect,  (ii)  consent to the
institution  of, or fail to  contest  in a timely and  appropriate  manner,  any
proceeding or petition  described in clause (h) of this Article VII, (iii) apply
for  or  consent  to  the  appointment  of  a  receiver,   trustee,   custodian,
sequestrator, conservator or similar official for the Borrower or any Restricted
Subsidiary  or for a  substantial  part  of its  assets,  (iv)  file  an  answer
admitting the material  allegations  of a petition  filed against it in any such
proceeding,  (v) make a general  assignment for the benefit of creditors or (vi)
take any action for the purpose of effecting any of the foregoing;

          (j) the Borrower  or any  Restricted Subsidiary  shall become  unable,
admit in writing its inability or fail generally to pay its debts as they become
due;

          (k) one or more  judgments for  the payment of  money in an  aggregate
amount in excess of  $75,000,000  shall be rendered  against the  Borrower,  any
Restricted  Subsidiary  or any  combination  thereof  and the same shall  remain
undischarged  for a period of 30 consecutive  days during which  execution shall
not be  effectively  stayed,  or any action shall be legally taken by a judgment
creditor to attach or levy upon any material  domestic assets of the Borrower or
any Restricted Subsidiary to enforce any such judgment;

          (l) an  ERISA  Event  shall have occurred that,  in the opinion of the
Required  Lenders,  when taken  together  with all other ERISA  Events that have
occurred,  could  reasonably be expected to result in a Material Adverse Effect;
or

          (m) a Change in Control shall occur;

then,  and in every such event  (other than an event with  respect to an Obligor
described in clause (h) or (i) of this Article VII), and at any time  thereafter
during the continuance of such event, the  Administrative  Agent may, and at the
request of the Required Lenders shall, by notice to the Borrower, take either or
both of the following actions, at the same or different times: (i) terminate the
Commitments, and thereupon the Commitments shall terminate immediately, and (ii)
declare the Loans then  outstanding  to be due and payable in whole (or in part,
in which case any principal not so declared to be due and payable may thereafter
be declared to be due and payable),  and thereupon the principal of the Loans so
declared to be due and payable,  together with accrued  interest thereon and all
fees and other obligations of the Borrower accrued  hereunder,  shall become due
and payable immediately, without presentment, demand, protest or other notice of
any kind,  all of which are hereby  waived by the  Borrower;  and in case of any


                                       39
                            364-DAY CREDIT AGREEMENT






event with respect to an Obligor  described in clause (h) or (i) of this Article
VII, the  Commitments  shall  automatically  terminate  and the principal of the
Loans then outstanding,  together with accrued interest thereon and all fees and
other obligations of the Borrower accrued hereunder,  shall automatically become
due and payable,  without  presentment,  demand,  protest or other notice of any
kind, all of which are hereby waived by the Borrower.

                                  ARTICLE VIII
                            THE ADMINISTRATIVE AGENT

     Section 8.01  Administrative  Agent. Each of the Lenders hereby irrevocably
appoints the Administrative Agent as its agent and authorizes the Administrative
Agent to take such  actions  on its behalf and to  exercise  such  powers as are
delegated to the  Administrative  Agent by the terms hereof,  together with such
actions and powers as are reasonably incidental thereto.

     The bank serving as the Administrative  Agent hereunder shall have the same
rights  and  powers in its  capacity  as a Lender as any  other  Lender  and may
exercise the same as though it were not the Administrative  Agent, and such bank
and its Affiliates may accept deposits from, lend money to and generally  engage
in any kind of business with the Borrower or any  Subsidiary or other  Affiliate
thereof as if it were not the Administrative Agent hereunder.

     The  Administrative  Agent shall not have any duties or obligations  except
those  expressly  set forth  herein.  Without  limiting  the  generality  of the
foregoing, (a) the Administrative Agent shall not be subject to any fiduciary or
other  implied  duties,  regardless  of whether a Default  has  occurred  and is
continuing,  (b) the  Administrative  Agent  shall not have any duty to take any
discretionary action or exercise any discretionary  powers, except discretionary
rights and powers expressly contemplated hereby that the Administrative Agent is
required to exercise  in writing as  directed by the  Required  Lenders (or such
other  number or  percentage  of the  Lenders  as shall be  necessary  under the
circumstances  as provided in Section  9.02),  and (c) except as  expressly  set
forth herein, the Administrative Agent shall not have any duty to disclose,  and
shall not be liable for the failure to disclose, any information relating to the
Borrower or any of its  Subsidiaries  that is communicated to or obtained by the
bank serving as  Administrative  Agent or any of its Affiliates in any capacity.
The  Administrative  Agent shall not be liable for any action taken or not taken
by it with the consent or at the request of the Required  Lenders (or such other
number  or  percentage   of  the  Lenders  as  shall  be  necessary   under  the
circumstances  as provided  in Section  9.02) or in the absence of its own gross
negligence or willful misconduct.  The Administrative  Agent shall be deemed not
to have  knowledge of any Default  unless and until  written  notice  thereof is
given  to the  Administrative  Agent  by  the  Borrower  or a  Lender,  and  the
Administrative  Agent shall not be responsible for or have any duty to ascertain
or inquire  into (i) any  statement,  warranty or  representation  made in or in
connection with this Agreement, (ii) the contents of any certificate,  report or
other  document  delivered  hereunder  or  in  connection  herewith,  (iii)  the
performance or observance of any of the covenants,  agreements or other terms or
conditions set forth herein, (iv) the validity, enforceability, effectiveness or
genuineness of this Agreement or any other agreement, instrument or document, or
(v) the  satisfaction  of any  condition  set forth in Article  IV or  elsewhere
herein,  other  than to  confirm  receipt  of  items  expressly  required  to be
delivered to the Administrative Agent.



                                       40
                            364-DAY CREDIT AGREEMENT






     The  Administrative  Agent shall be  entitled  to rely upon,  and shall not
incur any liability for relying upon, any notice, request, certificate, consent,
statement,  instrument,  document or other writing  believed by it to be genuine
and to have been signed or sent by the proper Person. The  Administrative  Agent
also may rely upon any statement  made to it orally or by telephone and believed
by it to be made by the proper  Person,  and shall not incur any  liability  for
relying thereon.  The  Administrative  Agent may consult with legal counsel (who
may be counsel for the  Borrower),  independent  accountants  and other  experts
selected by it, and shall not be liable for any action  taken or not taken by it
in accordance with the advice of any such counsel, accountants or experts.

     The  Administrative  Agent may perform any and all its duties and  exercise
its rights and powers by or through any one or more sub-agents  appointed by the
Administrative  Agent.  The  Administrative  Agent  and any such  sub-agent  may
perform any and all its duties and exercise its rights and powers  through their
respective  Related  Parties.  The  exculpatory   provisions  of  the  preceding
paragraphs  shall apply to any such sub-agent and to the Related  Parties of the
Administrative Agent and any such sub-agent, and shall apply to their respective
activities in connection with the syndication of the credit facilities  provided
for herein as well as activities as Administrative Agent.

     Subject to the  appointment  and  acceptance of a successor  Administrative
Agent as provided in this paragraph,  the Administrative Agent may resign at any
time by notifying the Lenders and the Borrower.  Upon any such resignation,  the
Required  Lenders shall have the right,  in consultation  with the Borrower,  to
appoint  a  successor.  If no  successor  shall  have been so  appointed  by the
Required Lenders and shall have accepted such  appointment  within 30 days after
the  retiring  Administrative  Agent gives notice of its  resignation,  then the
retiring Administrative Agent may, on behalf of the Lenders, appoint a successor
Administrative  Agent.  Upon the acceptance of its appointment as Administrative
Agent  hereunder  by a successor,  such  successor  shall  succeed to and become
vested  with all the  rights,  powers,  privileges  and  duties of the  retiring
Administrative Agent, and the retiring  Administrative Agent shall be discharged
from its duties and obligations hereunder. The fees payable by the Borrower to a
successor  Administrative  Agent  shall  be the  same as  those  payable  to its
predecessor  unless  otherwise  agreed between the Borrower and such  successor.
After the Administrative Agent's resignation  hereunder,  the provisions of this
Article VIII and Section  9.03 shall  continue in effect for the benefit of such
retiring  Administrative  Agent,  its  sub-agents and their  respective  Related
Parties in respect  of any  actions  taken or omitted to be taken by any of them
while it was acting as Administrative Agent.

     Each Lender  acknowledges  that it has,  independently and without reliance
upon the  Administrative  Agent or any other Lender and based on such  documents
and information as it has deemed  appropriate,  made its own credit analysis and
decision to enter into this  Agreement.  Each Lender also  acknowledges  that it
will,  independently and without reliance upon the  Administrative  Agent or any
other Lender and based on such  documents and  information as it shall from time
to time deem  appropriate,  continue to make its own  decisions in taking or not
taking action under or based upon this Agreement,  any related  agreement or any
document furnished hereunder or thereunder.


                                       41
                            364-DAY CREDIT AGREEMENT






     Section  8.02 The Lead  Arranger,  Sole  Bookrunner,  and  Co-Documentation
Agents. The Lead Arranger,  Sole Bookrunner,  and Co-Documentation  Agents shall
have no duties,  responsibilities  or  liabilities  under this Agreement and the
other Loan Documents other than their duties,  responsibilities  and liabilities
in their capacity as Lenders hereunder.

                                   ARTICLE IX
                                  MISCELLANEOUS

     Section   9.01   Notices.   Except  in  the  case  of  notices   and  other
communications  expressly  permitted  to be given by  telephone  (and subject to
paragraph (b) below), all notices and other  communications  provided for herein
shall be in writing and shall be delivered by hand or overnight courier service,
mailed by certified or registered mail or sent by telecopy, as follows:

          (a) if to the Borrower,  to 5205 North O'Connor Boulevard,  Suite 900,
Irving,  Texas,  75039,  Attention  of  Timothy  L.  Dove  (Facsimile  No. (972)
969-3572);

          (b) if to the Administrative Agent,  to JPMorgan Chase Bank,  Loan and
Agency Services Group, 1111 Fannin Street,  10th Floor,  Houston,  Texas, 77002,
Attention of Ms. Janene English  (Facsimile No. (713) 427-6307),  with a copy to
JPMorgan  Chase Bank,  600 Travis  Street,  20th Floor,  Houston,  Texas  77002,
Attention of Mr. Peter Licalzi (Facsimile No. (713) 216-4117);

          (c) if to any other Lender,  to it at its address (or telecopy number)
set forth in its Administrative Questionnaire.

          (d) Notices  and  communications  to  the  Lenders  hereunder  may  be
delivered or  furnished  by  electronic  communications  pursuant to  procedures
approved by the  Administrative  Agent;  provided that the  foregoing  shall not
apply  to  notices  pursuant  to  Article  II  unless  otherwise  agreed  by the
Administrative  Agent and the applicable Lender. The Administrative Agent or the
Borrower   may,  in  its   discretion,   agree  to  accept   notices  and  other
communications  to  it  hereunder  by  electronic   communications  pursuant  to
procedures  approved by it;  provided  that approval of such  procedures  may be
limited to particular notices or communications.

     Any party hereto may change its address or telecopy  number for notices and
other communications hereunder by notice to the other parties hereto, or, in the
case of any Lender, to the  Administrative  Agent and the Borrower.  All notices
and other  communications  given to any  party  hereto  in  accordance  with the
provisions of this  Agreement  shall be deemed to have been given on the date of
receipt.


                                       42
                            364-DAY CREDIT AGREEMENT






     Section 9.02  Waivers; Amendments.

          (a) No failure  or delay  by the Administrative Agent or any Lender in
exercising any right or power hereunder  shall operate as a waiver thereof,  nor
shall  any  single  or  partial  exercise  of any such  right or  power,  or any
abandonment  or  discontinuance  of steps  to  enforce  such a right  or  power,
preclude  any other or further  exercise  thereof or the  exercise  of any other
right or power.  The rights and  remedies  of the  Administrative  Agent and the
Lenders hereunder are cumulative and are not exclusive of any rights or remedies
that they would  otherwise have. No waiver of any provision of this Agreement or
consent  to any  departure  by the  Borrower  therefrom  shall  in any  event be
effective  unless the same shall be permitted  by paragraph  (b) of this Section
9.02,  and then such waiver or consent  shall be effective  only in the specific
instance and for the purpose for which given. Without limiting the generality of
the  foregoing,  the making of a Loan shall not be  construed as a waiver of any
Default,  regardless of whether the Administrative  Agent or any Lender may have
had notice or knowledge of such Default at the time.

          (b) Neither this Agreement,  any provision hereof,  nor any provisions
of the Subsidiary Guaranties,  if any, may be waived, amended or modified except
pursuant to an agreement or agreements  in writing  entered into by the Borrower
and the Required  Lenders or by the Borrower and the  Administrative  Agent with
the consent of the Required  Lenders;  provided that no such agreement shall (i)
increase or extend the Commitment of any Lender  without the written  consent of
such Lender,  (ii) reduce the principal amount of any Loan or reduce the rate of
interest  thereon,  or reduce any fees  payable  hereunder,  without the written
consent of each Lender  affected  thereby,  (iii) postpone the scheduled date of
payment of the principal amount of any Loan or any interest thereon, or any fees
payable hereunder, or reduce the amount of, waive or excuse any such payment, or
postpone the scheduled date of expiration of any Commitment, without the written
consent of each Lender  affected  thereby,  (iv) change  Section 2.09 or Section
2.18(b) or (c) in a manner that would alter the pro rata treatment of Lenders or
pro rata sharing of payments  required  thereby,  without the written consent of
each  Lender,  or (v) change any of the  provisions  of this Section 9.02 or the
definition of "Required  Lenders" or any other provision  hereof  specifying the
number or  percentage of Lenders  required to waive,  amend or modify any rights
hereunder or make any determination or grant any consent hereunder,  without the
written  consent of each Lender;  provided  further that no such agreement shall
amend,  modify or  otherwise  affect the rights or duties of the  Administrative
Agent hereunder without the prior written consent of the Administrative Agent.

     Section 9.03  Expenses; Indemnity; Damage Waiver.

          (a) The Borrower  shall pay  (i) all reasonable out-of-pocket expenses
incurred by the Administrative Agent and the Lead Arranger and their Affiliates,
including the  reasonable  fees,  charges and  disbursements  of counsel for the
Administrative   Agent,  in  connection  with  the  syndication  of  the  credit
facilities  provided for herein,  the  preparation  and  administration  of this
Agreement  and  the   Subsidiary   Guaranties,   if  any,  or  any   amendments,
modifications  or  waivers  of  the  provisions   hereof  (whether  or  not  the
transactions  contemplated  hereby or thereby shall be consummated) and (ii) all
reasonable  out-of-pocket  expenses incurred by the Administrative  Agent or any
Lender,  including the reasonable fees, charges and disbursements of any counsel
for the  Administrative  Agent or any Lender, in connection with the enforcement


                                       43
                            364-DAY CREDIT AGREEMENT





or protection of its rights in connection with this Agreement and the Subsidiary
Guaranties,  if any,  including  its  rights  under  this  Section  9.03,  or in
connection  with  the  Loans  made  hereunder,  including  all  such  reasonable
out-of-pocket   expenses   incurred   during  any  workout,   restructuring   or
negotiations in respect of such Loans. Attorneys' fees reimbursed by Borrower in
connection  with the matters  under  clause (ii) above shall be for a single law
firm  per  country   (unless   conflicts   (including   conflicts   between  the
Administrative  Agent,  the Lead Arranger and the other Lenders as determined in
the  reasonable  discretion  of the  Required  Lenders)  otherwise  prohibit the
engagement  of  a  single  law  firm)  plus  a  single  local  counsel  in  each
jurisdiction where local counsel is reasonably required.

          (b) The Borrower shall indemnify the Administrative Agent, each Lender
and each Related Party of any of the  foregoing  Persons (each such Person being
called an "Indemnitee") against, and hold each Indemnitee harmless from, any and
all losses,  claims,  damages,  liabilities and related expenses,  including the
reasonable  fees,  charges and  disbursements of any counsel for any Indemnitee,
incurred by or asserted  against any  Indemnitee  arising out of, in  connection
with, or as a result of (i) the  execution or delivery of this  Agreement or any
agreement or instrument  contemplated  hereby,  the  performance  by the parties
hereto of their  respective  obligations  hereunder or the  consummation  of the
Transactions or any other transactions contemplated hereby, (ii) any Loan or the
use of the proceeds  therefrom,  (iii) any actual or alleged presence or release
of Hazardous Materials on or from any property owned or operated by the Borrower
or any of its Subsidiaries, or any Environmental Liability related in any way to
the  Borrower  or any of its  Subsidiaries,  or (iv) any  actual or  prospective
claim, litigation, investigation or proceeding relating to any of the foregoing,
whether  based on contract,  tort or any other theory and  regardless of whether
any Indemnitee is a party thereto; provided that such indemnity shall not, as to
any Indemnitee,  be available to the extent that such losses,  claims,  damages,
liabilities  or  related  expenses  are  determined  by  a  court  of  competent
jurisdiction by final and nonappealable judgment to have resulted from the gross
negligence,  willful  misconduct or breach of  contractual  undertaking  of such
Indemnitee.

          (c) To the extent  that the  Borrower fails to pay any amount required
to be paid by it to the Administrative  Agent under paragraph (a) or (b) of this
Section 9.03, each Lender severally agrees to pay to the  Administrative  Agent,
such  Lender's  Applicable  Percentage  (determined  as of  the  time  that  the
applicable  unreimbursed  expense or indemnity payment is sought) of such unpaid
amount;  provided that the  unreimbursed  expense or  indemnified  loss,  claim,
damage,  liability  or related  expense,  as the case may be, was incurred by or
asserted against the Administrative Agent in its capacity as such.

          (d) To the extent permitted by applicable law,  the Borrower shall not
assert,  and hereby waives,  any claim against any Indemnitee,  on any theory of
liability, for special, indirect,  consequential or punitive damages (as opposed
to direct or actual damages)  arising out of, in connection with, or as a result
of, this  Agreement or any  agreement or  instrument  contemplated  hereby,  the
Transactions, any Loan or the use of the proceeds thereof.

          (e) All amounts due under this Section 9.03 shall be payable not later
than 30 days after written demand therefor.

     Section 9.04  Successors and Assigns.



                                       44
                            364-DAY CREDIT AGREEMENT






          (a) The provisions  of this Agreement shall  be binding upon and inure
to the benefit of the parties hereto and their respective successors and assigns
permitted  hereby,  except  that (i) the  Borrower  may not assign or  otherwise
transfer any of its rights or  obligations  hereunder  without the prior written
consent of each Lender (and any attempted assignment or transfer by the Borrower
without  such  consent  shall be null and void) and (ii) no Lender may assign or
otherwise transfer its rights or obligations hereunder except in accordance with
this Section 9.04.  Nothing in this  Agreement,  expressed or implied,  shall be
construed  to confer  upon any Person  (other  than the  parties  hereto,  their
respective successors and assigns permitted hereby,  Participants (to the extent
provided in  paragraph  (c) of this Section  9.04) and, to the extent  expressly
contemplated hereby, the Related Parties of each of the Administrative Agent and
the Lenders) any legal or equitable right, remedy or claim under or by reason of
this Agreement.

          (b)   (i) Subject  to the  conditions set forth in  paragraph  (b)(ii)
below,  any Lender may assign to one or more  assignees  all or a portion of its
rights and obligations  under this Agreement  (including all or a portion of its
Commitment and the Loans at the time owing to it) with the prior written consent
(such consent not to be unreasonably withheld or delayed) of:

                    (A) the Borrower,  provided that no consent  of the Borrower
shall be required for an  assignment to a Lender,  an Affiliate of a Lender,  an
Approved  Fund or, if an Event of Default has  occurred and is  continuing,  any
other assignee; and

                    (B) the Administrative Agent,  provided that  no consent  of
the  Administrative  Agent shall be required for an assignment of any Commitment
to an assignee  that is a Lender with a Commitment  immediately  prior to giving
effect to such assignment.

                (ii) Assignments shall  be subject  to the  following additional
conditions:

                    (A) except in  the case  of an  assignment to a Lender or an
Affiliate of a Lender or an  assignment  of the entire  remaining  amount of the
assigning  Lender's  Commitment  or  Loans  of  any  Class,  the  amount  of the
Commitment  or Loans of the  assigning  Lender  subject to each such  assignment
(determined as of the date the  Assignment  and Assumption  with respect to such
assignment  is  delivered  to the  Administrative  Agent) shall not be less than
$10,000,000 unless each of the Borrower and the  Administrative  Agent otherwise
consent,  provided that no such consent of the Borrower  shall be required if an
Event of Default has occurred and is continuing;

                    (B) each partial  assignment shall  be made as an assignment
of a  proportionate  part of all the assigning  Lender's  rights and obligations
under this  Agreement,  provided  that this  clause  shall not be  construed  to
prohibit the assignment of a  proportionate  part of all the assigning  Lender's
rights and obligations in respect of one Class of Commitments or Loans;



                                       45
                            364-DAY CREDIT AGREEMENT






                    (C) the parties to each assignment shall execute and deliver
to the  Administrative  Agent an  Assignment  and  Assumption,  together  with a
processing and recordation fee of $3,500; and

                    (D) the assignee, if it shall not be a Lender, shall deliver
to the Administrative Agent an Administrative  Questionnaire and comply with the
requirements of Section 2.17(e).

     For the purposes of this Section 9.04(b),  the term "Approved Fund" has the
following meaning:

     "Approved  Fund"  means any Person  (other than a natural  person)  that is
engaged in making,  purchasing,  holding or  investing in bank loans and similar
extensions  of  credit  in the  ordinary  course  of its  business  and  that is
administered or managed by (a) a Lender,  (b) an Affiliate of a Lender or (c) an
entity or an Affiliate of an entity that administers or manages a Lender.

                (iii) Subject to  acceptance and  recording thereof  pursuant to
paragraph  (b)(iv)  of this  Section  9.04,  from and after the  effective  date
specified in each Assignment and Assumption the assignee  thereunder  shall be a
party hereto and, to the extent of the interest  assigned by such Assignment and
Assumption,  have the rights and  obligations of a Lender under this  Agreement,
and the  assigning  Lender  thereunder  shall,  to the  extent  of the  interest
assigned by such  Assignment and  Assumption,  be released from its  obligations
under this Agreement (and, in the case of an Assignment and Assumption  covering
all of the assigning Lender's rights and obligations under this Agreement,  such
Lender shall cease to be a party hereto but shall continue to be entitled to the
benefits of Sections 2.15, 2.16, 2.17 and 9.03). Any assignment or transfer by a
Lender of rights or  obligations  under this Agreement that does not comply with
this Section  9.04 shall be treated for purposes of this  Agreement as a sale by
such Lender of a participation in such rights and obligations in accordance with
paragraph (c) of this Section 9.04.

                (iv) The Administrative  Agent,  acting for  this purpose  as an
agent of the  Borrower,  shall  maintain  at one of its  offices  a copy of each
Assignment and Assumption  delivered to it and a register for the recordation of
the names and  addresses of the Lenders,  and the  Commitment  of, and principal
amount of the Loans and owing to, each Lender  pursuant to the terms hereof from
time to time (the "Register").  The entries in the Register shall be conclusive,
and the Borrower, the Administrative Agent and the Lenders may treat each Person
whose name is recorded in the Register  pursuant to the terms hereof as a Lender
hereunder  for all  purposes of this  Agreement,  notwithstanding  notice to the
contrary. The Register shall be available for inspection by the Borrower and any
Lender,  at any  reasonable  time and from  time to time upon  reasonable  prior
notice.

                (v) Upon  its  receipt  of  a  duly   completed  Assignment  and
Assumption  executed by an  assigning  Lender and an  assignee,  the  assignee's
completed  Administrative  Questionnaire (unless the assignee shall already be a
Lender  hereunder),  the processing and recordation fee referred to in paragraph
(b) of this Section 9.04 and any written consent to such assignment  required by
paragraph (b) of this Section 9.04, the  Administrative  Agent shall accept such



                                       46
                            364-DAY CREDIT AGREEMENT





Assignment and Assumption and record the  information  contained  therein in the
Register. No assignment shall be effective for purposes of this Agreement unless
it has been recorded in the Register as provided in this paragraph.

          (c)  (i) Any Lender may,  without the  consent of  the Borrower or the
Administrative Agent, sell participations to one or more banks or other entities
(a  "Participant")  in all or a portion of such Lender's  rights and obligations
under this Agreement (including all or a portion of its Commitment and the Loans
owing to it);  provided that (A) such Lender's  obligations under this Agreement
shall remain unchanged,  (B) such Lender shall remain solely  responsible to the
other  parties  hereto  for  the  performance  of such  obligations  and (C) the
Borrower,  the Administrative Agent and the other Lenders shall continue to deal
solely and directly with such Lender in connection with such Lender's rights and
obligations under this Agreement.  Any agreement or instrument pursuant to which
a Lender sells such a participation  shall provide that such Lender shall retain
the  sole  right  to  enforce  this  Agreement  and to  approve  any  amendment,
modification  or waiver of any provision of this  Agreement;  provided that such
agreement  or  instrument  may provide  that such  Lender will not,  without the
consent  of the  Participant,  agree to any  amendment,  modification  or waiver
described in the first proviso to Section 9.02(b) that affects such Participant.
Subject to paragraph (c)(ii) of this Section 9.04, the Borrower agrees that each
Participant shall be entitled to the benefits of Sections 2.15, 2.16 and 2.17 to
the  same  extent  as if it were a  Lender  and had  acquired  its  interest  by
assignment pursuant to paragraph (b) of this Section 9.04.

               (ii) A Participant  shall not  be entitled to receive any greater
payment under Section 2.15 or Section 2.17 than the applicable Lender would have
been  entitled  to  receive  with  respect  to the  participation  sold  to such
Participant,  unless the sale of the  participation  to such Participant is made
with the Borrower's prior written consent. A Participant that would be a Foreign
Lender if it were a Lender shall not be entitled to the benefits of Section 2.17
unless the Borrower is notified of the  participation  sold to such  Participant
and such  Participant  agrees,  for the benefit of the Borrower,  to comply with
Section 2.17(e) as though it were a Lender.

          (d) Any Lender may at any time pledge or assign a security interest in
all or any portion of its rights under this  Agreement to secure  obligations of
such Lender,  including  without  limitation  any pledge or assignment to secure
obligations  to a Federal  Reserve Bank, and this Section shall not apply to any
such pledge or assignment of a security  interest;  provided that no such pledge
or  assignment  of a security  interest  shall  release a Lender from any of its
obligations hereunder or substitute any such pledgee or assignee for such Lender
as a party hereto.

     Section 9.05  Survival.  All  covenants,  agreements,  representations  and
warranties  made  by  the  Borrower  herein  and in the  certificates  or  other
instruments  delivered in connection with or pursuant to this Agreement shall be
considered  to have been  relied  upon by the  other  parties  hereto  and shall
survive  the  execution  and  delivery of this  Agreement  and the making of any
Loans,  regardless of any  investigation  made by any such other party or on its
behalf and notwithstanding  that the Administrative Agent or any Lender may have
had notice or knowledge of any Default or incorrect  representation  or warranty
at the time any credit is extended  hereunder,  and shall continue in full force



                                       47
                            364-DAY CREDIT AGREEMENT





and effect as long as the  principal  of or any accrued  interest on any Loan or
any fee or any other amount  payable  under this  Agreement is  outstanding  and
unpaid  and so long as the  Commitments  have not  expired  or  terminated.  The
provisions of Sections 2.15,  2.16, 2.17 and 9.03 and Article VIII shall survive
and  remain in full  force and  effect  regardless  of the  consummation  of the
transactions  contemplated hereby, the repayment of the Loans, the expiration or
termination  of the  Commitments  or the  termination  of this  Agreement or any
provision hereof.

     Section 9.06 Counterparts;  Integration;  Effectiveness. This Agreement may
be  executed in  counterparts  (and by  different  parties  hereto on  different
counterparts), each of which shall constitute an original, but all of which when
taken  together  shall  constitute a single  contract.  This  Agreement  and any
separate letter  agreements  with respect to fees payable to the  Administrative
Agent  constitute the entire contract among the parties  relating to the subject
matter hereof and supersede any and all previous  agreements and understandings,
oral or written,  relating to the subject matter  hereof.  Except as provided in
Section 4.01,  this  Agreement  shall become  effective  when it shall have been
executed by the  Administrative  Agent and when the  Administrative  Agent shall
have  received  counterparts  hereof  which,  when  taken  together,   bear  the
signatures of each of the other parties hereto,  and thereafter shall be binding
upon and  inure to the  benefit  of the  parties  hereto  and  their  respective
successors and assigns.  Delivery of an executed counterpart of a signature page
of this  Agreement  by  telecopy  shall be  effective  as delivery of a manually
executed counterpart of this Agreement.

     Section 9.07  Severability.  Any  provision of this  Agreement  held  to be
invalid,  illegal  or  unenforceable  in  any  jurisdiction  shall,  as to  such
jurisdiction,  be  ineffective to the extent of such  invalidity,  illegality or
unenforceability without affecting the validity,  legality and enforceability of
the remaining provisions hereof; and the invalidity of a particular provision in
a  particular  jurisdiction  shall not  invalidate  such  provision in any other
jurisdiction.

     Section 9.08  Governing Law; Jurisdiction; Consent to Service of Process.

          (a) THIS AGREEMENT  AND THE NOTES SHALL BE GOVERNED BY,  AND CONSTRUED
IN  ACCORDANCE  WITH,  THE LAWS OF THE STATE OF TEXAS  EXCEPT TO THE EXTENT THAT
UNITED STATES FEDERAL LAW PERMITS ANY LENDER TO CONTRACT FOR,  CHARGE,  RECEIVE,
RESERVE OR TAKE INTEREST AT THE RATE ALLOWED BY THE LAWS OF THE STATE WHERE SUCH
LENDER IS  LOCATED.  CHAPTER  346 OF THE TEXAS  FINANCE  CODE  (WHICH  REGULATES
CERTAIN REVOLVING CREDIT LOAN ACCOUNTS AND REVOLVING  TRI-PARTY  ACCOUNTS) SHALL
NOT APPLY TO THIS AGREEMENT.

          (b) ANY LEGAL ACTION OR  PROCEEDING WITH RESPECT TO THE LOAN DOCUMENTS
SHALL BE BROUGHT IN THE COURTS OF THE STATE OF TEXAS OR OF THE UNITED  STATES OF
AMERICA FOR THE SOUTHERN  DISTRICT OF TEXAS,  AND, BY EXECUTION  AND DELIVERY OF
THIS  AGREEMENT,  EACH  PARTY  HEREBY  ACCEPTS  FOR  ITSELF  AND (TO THE  EXTENT
PERMITTED BY LAW) IN RESPECT OF ITS PROPERTY, GENERALLY AND UNCONDITIONALLY, THE
JURISDICTION OF THE AFORESAID COURTS.  EACH PARTY HEREBY  IRREVOCABLY WAIVES ANY
OBJECTION,  INCLUDING,  WITHOUT LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE


                                       48
                            364-DAY CREDIT AGREEMENT






OR BASED ON THE GROUNDS OF FORUM NON  CONVENIENS,  WHICH IT MAY NOW OR HEREAFTER
HAVE TO THE  BRINGING  OF ANY  SUCH  ACTION  OR  PROCEEDING  IN SUCH  RESPECTIVE
JURISDICTIONS.  THIS SUBMISSION TO JURISDICTION  IS  NON-EXCLUSIVE  AND DOES NOT
PRECLUDE A PARTY FROM  OBTAINING  JURISDICTION  OVER ANOTHER  PARTY IN ANY COURT
OTHERWISE HAVING JURISDICTION.

          (c) EACH PARTY IRREVOCABLY  CONSENTS TO  THE SERVICE OF PROCESS OF ANY
OF THE AFOREMENTIONED  COURTS IN ANY SUCH ACTION OR PROCEEDING BY THE MAILING OF
COPIES THEREOF BY REGISTERED OR CERTIFIED MAIL,  POSTAGE  PREPAID,  TO IT AT THE
ADDRESS SPECIFIED IN Section 9.01 OR SUCH OTHER ADDRESS AS IS SPECIFIED PURSUANT
TO Section  9.01 (OR ITS  ASSIGNMENT  AND  ASSUMPTION),  SUCH  SERVICE TO BECOME
EFFECTIVE  THIRTY (30) DAYS AFTER SUCH MAILING.  NOTHING HEREIN SHALL AFFECT THE
RIGHT OF A PARTY OR ANY HOLDER OF A NOTE TO SERVE  PROCESS  IN ANY OTHER  MANNER
PERMITTED BY LAW OR TO COMMENCE LEGAL  PROCEEDINGS OR OTHERWISE  PROCEED AGAINST
ANOTHER PARTY IN ANY OTHER JURISDICTION.

     SECTION 9.09 WAIVER OF JURY TRIAL.  EACH PARTY HEREBY (i)  IRREVOCABLY  AND
UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY LAW, TRIAL BY JURY IN
ANY LEGAL ACTION OR PROCEEDING  RELATING TO THIS AGREEMENT OR ANY OTHER DOCUMENT
RELATED TO THIS AGREEMENT AND FOR ANY  COUNTERCLAIM  THEREIN;  (ii)  IRREVOCABLY
WAIVES,  TO THE MAXIMUM  EXTENT NOT  PROHIBITED BY LAW, ANY RIGHT IT MAY HAVE TO
CLAIM OR RECOVER IN ANY SUCH  LITIGATION  ANY  SPECIAL,  EXEMPLARY,  PUNITIVE OR
CONSEQUENTIAL DAMAGES, OR DAMAGES OTHER THAN, OR IN ADDITION TO, ACTUAL DAMAGES;
(iii) CERTIFIES THAT NO PARTY HERETO NOR ANY  REPRESENTATIVE OR AGENT OR COUNSEL
FOR ANY PARTY HERETO HAS  REPRESENTED,  EXPRESSLY OR OTHERWISE,  OR IMPLIED THAT
SUCH PARTY WOULD NOT, IN THE EVENT OF LITIGATION,  SEEK TO ENFORCE THE FOREGOING
WAIVERS,  AND (iv)  ACKNOWLEDGES  THAT IT HAS BEEN  INDUCED  TO ENTER  INTO THIS
AGREEMENT,  THE LOAN  DOCUMENTS  AND THE  TRANSACTIONS  CONTEMPLATED  HEREBY AND
THEREBY BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS  CONTAINED
IN THIS SECTION 9.09.

     Section  9.10  Headings.  Article  and  Section  headings  and the Table of
Contents used herein are for convenience of reference only, are not part of this
Agreement  and  shall  not  affect  the   construction  of,  or  be  taken  into
consideration in interpreting, this Agreement.

     Section  9.11  Confidentiality.  Each of the  Administrative  Agent and the
Lenders agrees to maintain the  confidentiality  of the  Information (as defined
below),  except that Information may be disclosed (a) to its and its Affiliates'
directors,  officers,  employees  and agents,  including  accountants  and legal
counsel (it being  understood  that the Persons to whom such  disclosure is made
will be informed of the  confidential  nature of such Information and instructed
to keep such  Information  confidential),  (b) to the  extent  requested  by any


                                       49
                            364-DAY CREDIT AGREEMENT






regulatory authority or any self-regulatory body claiming to have authority, (c)
to the extent  required by applicable  laws or regulations or by any subpoena or
similar legal process or  authority,  (d) to any other party to this  Agreement,
(e) in  connection  with the  exercise of any  remedies  hereunder  or any suit,
action or proceeding  relating to this  Agreement or the  enforcement  of rights
hereunder,  (f) subject to an agreement containing provisions  substantially the
same as those of this Section 9.11, to (i) any assignee of or Participant in, or
any prospective  assignee of or Participant in, any of its rights or obligations
under  this  Agreement,  (ii) any  actual or  prospective  counterparty  (or its
advisors) to any swap or derivative transaction relating to the Borrower and its
obligations,  or (iii) to its  advisors  (other than its  accountants  and legal
counsel),  (g)  with the  consent  of the  Borrower  or (h) to the  extent  such
Information  becomes  publicly  available  other than as a result of a breach of
this  Section.  For the purposes of this Section 9.11,  "Information"  means all
information received from the Borrower relating to the Borrower or its business,
other than any such information that is available to the Administrative Agent or
any Lender on a  nonconfidential  basis  prior to  disclosure  by the  Borrower.
Notwithstanding  anything  herein to the contrary,  any party to this  Agreement
(and any employees, representatives and other agents of such party) may disclose
to any and all persons,  without limitation of any kind (a) any information with
respect to the U.S.  federal and state income tax treatment of the  transactions
contemplated herein and any facts that may be relevant to understanding such tax
treatment,  which  facts  shall not  include  for this  purpose the names of the
parties or any other  person  named  herein,  or  information  that would permit
identification  of the parties or such other  persons,  or any pricing  terms or
other nonpublic business or financial  information that is unrelated to such tax
treatment or facts,  and (b) all  materials of any kind  (including  opinions or
other tax analyses) relating to such tax treatment or facts that are provided to
any of the persons referred to above.

     Section 9.12 Interest Rate  Limitation.  It is the intention of the parties
hereto that each Lender shall conform  strictly to usury laws  applicable to it.
Accordingly, if the transactions contemplated hereby would be usurious as to any
Lender under laws  applicable to it (including  the laws of the United States of
America  and the  State of Texas or any  other  jurisdiction  whose  laws may be
mandatorily  applicable to such Lender  notwithstanding  the other provisions of
this Agreement),  then, in that event,  notwithstanding anything to the contrary
in the Agreement or the Subsidiary Guaranties,  if any, it is agreed as follows:
(i) the aggregate of all  consideration  which  constitutes  interest  under law
applicable to any Lender that is contracted  for,  taken,  reserved,  charged or
received by such Lender under the  Agreement or the  Subsidiary  Guaranties,  if
any,  shall under no  circumstances  exceed the maximum  amount  allowed by such
applicable  law,  and  any  excess  shall  be  canceled   automatically  and  if
theretofore paid shall be credited by such Lender on the principal amount of the
Indebtedness  (or, to the extent that the principal  amount of the  Indebtedness
shall have been or would thereby be paid in full, refunded by such Lender to the
Borrower);  and (ii) in the event of any required or permitted prepayment,  then
such consideration that constitutes  interest under law applicable to any Lender
may never include more than the maximum amount allowed by such  applicable  law,
and excess interest,  if any,  provided for in this Agreement or otherwise shall
be canceled  automatically by such Lender as of the date of such acceleration or
prepayment  and, if  theretofore  paid,  shall be credited by such Lender on the
principal  amount of the  Indebtedness  (or,  to the extent  that the  principal
amount of the  Indebtedness  shall  have been or would  thereby be paid in full,
refunded by such Lender to the Borrower).  All sums paid or agreed to be paid to
any Lender for the use, forbearance or detention of sums due hereunder shall, to
the extent permitted by law applicable to such Lender,  be amortized,  prorated,
allocated  and spread  throughout  the stated term of the Loans until payment in



                                       50
                            364-DAY CREDIT AGREEMENT





full so that the rate or amount of  interest  on account of any Loans  hereunder
does not exceed the maximum  amount  allowed by such  applicable  law. If at any
time and from time to time (i) the amount of  interest  payable to any Lender on
any date shall be computed at the Highest Lawful Rate  applicable to such Lender
pursuant to this  Section  9.12 and (ii) in respect of any  subsequent  interest
computation period the amount of interest otherwise payable to such Lender would
be less than the amount of  interest  payable  to such  Lender  computed  at the
Highest  Lawful  Rate  applicable  to such  Lender,  then the amount of interest
payable to such Lender in respect of such subsequent interest computation period
shall  continue to be computed at the  Highest  Lawful Rate  applicable  to such
Lender until the total amount of interest payable to such Lender shall equal the
total  amount of interest  which  would have been  payable to such Lender if the
total amount of interest had been computed without giving effect to this Section
9.12.  To the extent that Chapter 303 of the Texas  Finance Code is relevant for
the purpose of determining the Highest Lawful Rate applicable to a Lender,  such
Lender elects to determine the applicable rate ceiling under such Chapter by the
weekly  ceiling  from time to time in effect.  Chapter 346 of the Texas  Finance
Code does not apply to the Borrower's obligations hereunder.

     Section  9.13 USA Patriot  Act Notice.  Each  Lender  hereby  notifies  the
Borrower that pursuant to the  requirements of the USA Patriot Act (Title III of
Pub. L. 107-56  (signed into law October 26, 2001)) (the "Act"),  it is required
to obtain,  verify and record  information  that identifies the Borrower,  which
information  includes the name and address of the Borrower and other information
that will allow such Lender to identify the Borrower in accordance with the Act.


                        [SIGNATURE PAGES BEGIN NEXT PAGE]



                                       51
                            364-DAY CREDIT AGREEMENT







     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly  executed by their  respective  authorized  officers as of the day and year
first above written.

Borrower:                            PIONEER NATURAL RESOURCES COMPANY
- --------


                                     By:    /s/ Timothy L. Dove
                                          -------------------------------------
                                            Timothy L. Dove
                                            Executive Vice President and
                                            Chief Financial Officer



Administrative Agent & Lender:       JPMORGAN CHASE BANK
- -----------------------------


                                     By:    /s/ Robert C. Mertensotto
                                          -------------------------------------
                                            Robert C. Mertensotto
                                            Managing Director



Lead Arranger and Sole Bookrunner:   J.P. MORGAN SECURITIES INC.
- ---------------------------------


                                     By:    /s/ George M. Serice
                                          -------------------------------------
                                     Name:   George M. Serice
                                     Title:  Vice President



Lender and Co-Documentation Agent:   BANK OF AMERICA, N.A.
- ---------------------------------


                                     By:    /s/ Richard L. Stein
                                          -------------------------------------
                                     Name:  Richard L. Stein
                                     Title: Principal


                                Signature Page 1
                            364-DAY CREDIT AGREEMENT





Lender and Co-Documentation Agent:   BARCLAYS BANK PLC
- ---------------------------------


                                     By:    /s/ Nicholas A. Bell
                                          -------------------------------------
                                     Name:  Nicholas A. Bell
                                     Title: Director
                                            Loan Transaction Management



Lender and Co-Documentation Agent:   WACHOVIA BANK, NATIONAL ASSOCIATION
- ---------------------------------


                                     By:    /s/ David Humphreys
                                          -------------------------------------
                                     Name:  David Humphreys
                                     Title: Director



Lender and Co-Documentation Agent:   WELLS FARGO BANK, NATIONAL ASSOCIATION
- ---------------------------------


                                     By:    /s/ David C. Brooks
                                          -------------------------------------
                                     Name:  David C. Brooks
                                     Title: Vice President



                                Signature Page 2
                            364-DAY CREDIT AGREEMENT





Lenders:                             ABN AMRO
- -------

                                     By:     /s/ John D. Reed
                                          -------------------------------------
                                     Name:   John D. Reed, CFA
                                     Title:  Vice President


                                     By:     /s/ Scott Donaldson
                                          -------------------------------------
                                     Name:   Scott Donaldson
                                     Title:  Vice President



                                     AUSTRALIA AND NEW ZEALAND
                                     BANKING GROUP LIMITED


                                     By:     /s/ John W. Wade
                                          -------------------------------------
                                     Name:   John W. Wade
                                     Title:  Director



                                     HARRIS NESBITT FINANCING, INC.


                                     By:     /s/ James V. Ducote
                                          -------------------------------------
                                     Name:   James V. Ducote
                                     Title:  Vice President



                                     BNP PARIBAS


                                     By:     /s/ David Dodd
                                          -------------------------------------
                                     Name:   David Dodd
                                     Title:  Director


                                     By:     /s/ Betsy Jocher
                                          -------------------------------------
                                     Name:   Betsy Jocher
                                     Title:  Vice President

                                Signature Page 3
                            364-DAY CREDIT AGREEMENT





                                     CALYON NEW YORK BRANCH



                                     By:     /s/ Olivier Audemard
                                          -------------------------------------
                                     Name:   Olivier Audemard
                                     Title:  Managing Director



                                     CITIBANK, N.A.



                                     By:     /s/ Joronne Jeter
                                          -------------------------------------
                                     Name:   Joronne Jeter
                                     Title:  Attorney-in-Fact



                                     CREDIT SUISSE FIRST BOSTON
                                     acting through its Cayman Islands Branch



                                     By:     /s/ Paul L. Colon
                                          -------------------------------------
                                     Name:   Paul L. Colon
                                     Title:  Director


                                     By:     /s/ Vanessa Gomez
                                          -------------------------------------
                                     Name:   Vanessa Gomez
                                     Title:  Associate

                                Signature Page 4
                            364-DAY CREDIT AGREEMENT





                                     DEUTSCHE BANK AG NEW YORK BRANCH


                                     By:     /s/ Joel Makowsky
                                          -------------------------------------
                                     Name:   Joel Makowsky
                                     Title:  Director


                                     By:     /s/ Michael Starmer-Smith
                                          -------------------------------------
                                     Name:   Michael Starmer-Smith
                                     Title:  Managing Director



                                     DNB NOR BANK ASA


                                     By:     /s/ Peter M. Dodge
                                          -------------------------------------
                                     Name:   Peter M. Dodge
                                     Title:  First Vice President


                                     By:     /s/ Stig Kristiansen
                                          -------------------------------------
                                     Name:   Stig Kristiansen
                                     Title:  Vice President



                                     KBC BANK N.V.


                                     By:     /s/ Jean-Pierre Diels
                                          -------------------------------------
                                     Name:   Jean-Pierre Diels
                                     Title:  First Vice President


                                     By:     /s/ Eric Raskin
                                          -------------------------------------
                                     Name:   Eric Raskin
                                     Title:  Vice President

                                Signature Page 5
                            364-DAY CREDIT AGREEMENT






                                     MIZUHO CORPORATE BANK (USA)



                                     By:     /s/ Raymond Ventura
                                          -------------------------------------
                                     Name:   Raymond Ventura
                                     Title:  Senior Vice President



                                     SUNTRUST BANK



                                     By:     /s/ James M. Warren
                                          -------------------------------------
                                     Name:   James M. Warren
                                     Title:  Director



                                     THE BANK OF NEW YORK



                                     By:     /s/ Craig J. Anderson
                                          -------------------------------------
                                     Name:   Craig J. Anderson
                                     Title:  Vice President




                                Signature Page 6
                            364-DAY CREDIT AGREEMENT





                                     THE BANK OF NOVA SCOTIA



                                     By:     /s/ William E. Zarrett
                                          -------------------------------------
                                     Name:   William E. Zarrett
                                     Title:  Managing Director



                                     SCOTIABANC INC.



                                     By:     /s/ William E. Zarrett
                                          -------------------------------------
                                     Name:   William E. Zarrett
                                     Title:  Managing Director



                                     TORONTO DOMINION (TEXAS), INC.



                                     By:     /s/ Neva Nesbitt
                                          -------------------------------------
                                     Name:   Neva Nesbitt
                                     Title:  Vice President



                                     UFJ BANK LIMITED



                                     By:     /s/ Seiji Tate
                                          -------------------------------------
                                     Name:   Seiji Tate
                                     Title:  AVP


                                Signature Page 7
                            364-DAY CREDIT AGREEMENT






                                     UNION BANK OF CALIFORNIA, N.A.



                                     By:     /s/ Damien Meiburger
                                          -------------------------------------
                                     Name:   Damien Meiburger
                                     Title:  Senior Vice President



                                     U.S. BANK NATIONAL ASSOCIATION



                                     By:     /s/ Kathryn A. Gaiter
                                          -------------------------------------
                                     Name:   Kathryn A. Gaiter
                                     Title:  Vice President



                                Signature Page 8
                            364-DAY CREDIT AGREEMENT








                                  SCHEDULE 2.01
                                   COMMITMENTS




                Lender                              Amount of         Percentage of Total
                                                    Commitment            Commitments
- --------------------------------------------     ----------------     -------------------
                                                                      
JPMorgan Chase Bank                               $50,000,000.00            5.5555555%
Bank of America, N.A.                             $50,000,000.00            5.5555555%
Barclays Bank PLC                                 $50,000,000.00            5.5555555%
BNP Paribas                                       $50,000,000.00            5.5555555%
Calyon New York Branch                            $50,000,000.00            5.5555555%
Citibank, N.A.                                    $50,000,000.00            5.5555555%
Suntrust Bank                                     $50,000,000.00            5.5555555%
UFJ Bank Limited                                  $50,000,000.00            5.5555555%
Wachovia Bank, National Association               $50,000,000.00            5.5555555%
Wells Fargo Bank, National Association            $50,000,000.00            5.5555555%
ABN AMRO                                          $34,000,000.00            3.7777778%
Australia and New Zealand Bank Group Limited      $34,000,000.00            3.7777778%
Harris Nesbitt Financing, Inc.                    $34,000,000.00            3.7777778%
Credit Suisse First Boston                        $34,000,000.00            3.7777778%
Deutsche Bank AG New York Branch                  $34,000,000.00            3.7777778%
Mizuho Corporate Bank (USA)                       $34,000,000.00            3.7777778%
Union Bank of California, N.A.                    $34,000,000.00            3.7777778%
U.S. Bank, National Association                   $34,000,000.00            3.7777778%
The Bank of Nova Scotia                           $30,000,000.00            3.3333333%
DNB Nor Bank ASA                                  $21,000,000.00            2.3333333%
KBC Bank                                          $21,000,000.00            2.3333333%
The Bank of New York                              $21,000,000.00            2.3333333%
Scotiabanc Inc.                                   $20,000,000.00            2.2222222%
Toronto Dominion                                  $15,000,000.00            1.6666666%

                              TOTAL:             $900,000,000.00        100.000000000%



                                 Schedule 2.01
                            364-DAY CREDIT AGREEMENT





                                  SCHEDULE 3.06
                                DISCLOSED MATTERS




John Stephen Alford and Robert Larrabee, individually and on behalf of Plaintiff
Class v. Mesa Inc., Hugoton Capital Limited Partnership,  Mesa Operating Limited
Partnership,  No. 93 CV 37;  26th  District  Court of Stevens  County,  KS Civil
Department.

United States of America,  Federal Energy Regulatory  Commission,  Southern Star
Central Gas Pipeline, Inc. Docket Nos. RP98-52-051, et al. and Panhandle Eastern
Pipe Line Company, et al. Docket No. RP98-40 et al.








                                 Schedule 3.06
                            364-DAY CREDIT AGREEMENT






                                  SCHEDULE 6.02
                                      LIENS



                                      NONE










                                 Schedule 6.02
                            364-DAY CREDIT AGREEMENT







                                  SCHEDULE 6.08
                         EXISTING RESTRICTIVE AGREEMENTS



                                      NONE










                                 Schedule 6.08
                            364-DAY CREDIT AGREEMENT








                                    EXHIBIT A


                                     FORM OF


                            ASSIGNMENT AND ASSUMPTION


                This Assignment and Assumption (the "Assignment and Assumption")
is dated as of the  Effective  Date set forth  below and is entered  into by and
between [Insert name of Assignor] (the "Assignor") and [Insert name of Assignee]
(the  "Assignee").  Capitalized terms used but not defined herein shall have the
meanings  given to them in the 364-Day  Credit  Agreement  identified  below (as
amended,  the  "Credit  Agreement"),  receipt  of a  copy  of  which  is  hereby
acknowledged  by the Assignee.  The Standard  Terms and  Conditions set forth in
Annex 1  attached  hereto  are  hereby  agreed  to and  incorporated  herein  by
reference  and made a part of this  Assignment  and  Assumption  as if set forth
herein in full.

                For an agreed  consideration,  the  Assignor hereby  irrevocably
sells and assigns to the Assignee, and the Assignee hereby irrevocably purchases
and assumes from the Assignor,  subject to and in  accordance  with the Standard
Terms and Conditions and the Credit Agreement, as of the Effective Date inserted
by the  Administrative  Agent as  contemplated  below (i) all of the  Assignor's
rights and  obligations  in its capacity as a Lender under the Credit  Agreement
and any other documents or instruments  delivered pursuant thereto to the extent
related to the amount and percentage  interest  identified  below of all of such
outstanding  rights  and  obligations  of  the  Assignor  under  the  respective
facilities   identified  below  (including  any  guarantees   included  in  such
facilities)  and (ii) to the extent  permitted to be assigned  under  applicable
law, all claims, suits, causes of action and any other right of the Assignor (in
its capacity as a Lender) against any Person, whether known or unknown,  arising
under or in  connection  with the  Credit  Agreement,  any  other  documents  or
instruments delivered pursuant thereto or the loan transactions governed thereby
or in any way based on or related to any of the  foregoing,  including  contract
claims, tort claims,  malpractice claims,  statutory claims and all other claims
at law or in equity  related  to the rights and  obligations  sold and  assigned
pursuant  to clause (i) above  (the  rights and  obligations  sold and  assigned
pursuant to clauses (i) and (ii) above being referred to herein  collectively as
the "Assigned  Interest").  Such sale and assignment is without  recourse to the
Assignor and,  except as expressly  provided in this  Assignment and Assumption,
without representation or warranty by the Assignor.


1.       Assignor:
                                   ------------------------------

2.       Assignee:
                                   ------------------------------
                                   [and is an Affiliate/Approved Fund of
                                   [identify Lender]1]

3.       Borrower(s):
                                   -----------------------------=

4.       Administrative Agent:
                                   ----------------------, as the administrative
                                   agent under the Credit Agreement


- -----------------------
1 Select as applicable.


                                  Exhibit A-1
                            364-DAY CREDIT AGREEMENT






5.       Credit Agreement:         The  364-Day  Credit  Agreement  dated  as of
                                   September  28,  2004  among  Pioneer  Natural
                                   Resources Company, a Delaware corporation, as
                                   the  Borrower,   JPMorgan   Chase  Bank,   as
                                   Administrative  Agent,   the   Lenders  party
                                   thereto,  Bank  of  America,  N.A.,  Barclays
                                   Bank  Plc,   Wells   Fargo   Bank,   National
                                   Association,   and  Wachovia  Bank,  National
                                   Association,  as Lender  and Co-Documentation
                                   Agents, and J.P. Morgan  Securities Inc.,  as
                                   Lead Arranger and Sole Bookrunner

6.       Assigned Interest:


- ----------------------------------------------------------------------------------------------
  Facility Assigned2      Aggregate Amount of        Amount of        Percentage Assigned of
                          Commitment/Loans for    Commitment/Loans       Commitment/Loans3
                              all Lenders             Assigned
- ----------------------------------------------------------------------------------------------
                                                                           
                        $                        $                                  %
- ----------------------  -----------------------  ------------------  -------------------------
                        $                        $                                  %
- ----------------------  -----------------------  ------------------  -------------------------
                        $                        $                                  %
- ----------------------------------------------------------------------------------------------



Effective Date: _____________ ___, 20___ [TO BE INSERTED BY ADMINISTRATIVE AGENT
AND WHICH SHALL BE THE EFFECTIVE DATE OF RECORDATION OF TRANSFER IN THE REGISTER
THEREFOR.]

The terms set forth in this Assignment and Assumption are hereby agreed to:

                                           ASSIGNOR

                                           [NAME OF ASSIGNOR]


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


                                           ASSIGNEE

                                           [NAME OF ASSIGNEE]


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


- --------------------
2  Fill in  the appropriate  terminology for  the types  of facilities under the
   Credit  Agreement  that  are  being  assigned  under  this  Assignment  (e.g.
   "Commitment," "Term Loan," etc.)
3  Set forth, to at least 9 decimals, as a percantage of the Commitment/Loans of
   all Lenders thereunder.


                                  Exhibit A-2
                            364-DAY CREDIT AGREEMENT





Consented to and Accepted:

JPMORGAN CHASE BANK, as
  Administrative Agent


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


Consented to:

[NAME OF RELEVANT PARTY]


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






                                  Exhibit A-3
                            364-DAY CREDIT AGREEMENT



                                                                        ANNEX 1



                             [__________________]4

                        STANDARD TERMS AND CONDITIONS FOR
                            ASSIGNMENT AND ASSUMPTION

          1. Representations and Warranties.

          1.1  Assignor. The Assignor (a) represents and warrants that (i) it is
the legal and  beneficial  owner of the  Assigned  Interest,  (ii) the  Assigned
Interest is free and clear of any lien,  encumbrance  or other adverse claim and
(iii) it has full power and authority,  and has taken all action  necessary,  to
execute and  deliver  this  Assignment  and  Assumption  and to  consummate  the
transactions contemplated hereby; and (b) assumes no responsibility with respect
to (i) any statements,  warranties or  representations  made in or in connection
with the  Credit  Agreement  or any other  Loan  Document,  (ii) the  execution,
legality,  validity,  enforceability,  genuineness,  sufficiency or value of the
Loan Documents or any collateral  thereunder,  (iii) the financial  condition of
the  Borrower,  any of its  Subsidiaries  or  Affiliates  or  any  other  Person
obligated in respect of any Loan Document or (iv) the  performance or observance
by the Borrower,  any of its  Subsidiaries  or Affiliates or any other Person of
any of their respective obligations under any Loan Document.

          1.2.  Assignee. The Assignee  (a) represents and warrants that  (i) it
has full power and authority, and has taken all action necessary, to execute and
deliver this  Assignment  and  Assumption  and to  consummate  the  transactions
contemplated  hereby and to become a Lender under the Credit Agreement,  (ii) it
satisfies the requirements,  if any,  specified in the Credit Agreement that are
required to be  satisfied  by it in order to acquire the  Assigned  Interest and
become a Lender,  (iii) from and after the Effective  Date, it shall be bound by
the provisions of the Credit Agreement as a Lender thereunder and, to the extent
of the Assigned  Interest,  shall have the  obligations of a Lender  thereunder,
(iv) it has received a copy of the Credit Agreement, together with copies of the
most recent financial  statements  delivered pursuant to Section ___ thereof, as
applicable,   and  such  other  documents  and  information  as  it  has  deemed
appropriate  to make its own credit  analysis  and  decision  to enter into this
Assignment and Assumption and to purchase the Assigned  Interest on the basis of
which it has made such analysis and decision  independently and without reliance
on the  Administrative  Agent or any  other  Lender,  and (v) if it is a Foreign
Lender5, attached to the Assignment and Assumption is any documentation required
to be  delivered  by it  pursuant  to the terms of the  Credit  Agreement,  duly
completed  and  executed  by the  Assignee;  and (b)  agrees  that  (i) it will,
independently and without reliance on the Administrative  Agent, the Assignor or
any other Lender,  and based on such documents and  information as it shall deem
appropriate at the time,  continue to make its own credit decisions in taking or
not  taking  action  under  the  Loan  Documents,  and (ii) it will  perform  in
accordance  with their  terms all of the  obligations  which by the terms of the
Loan Documents are required to be performed by it as a Lender.

           2. Payments.  From and after the  Effective Date,  the Administrative
Agent shall make all  payments in respect of the  Assigned  Interest  (including
payments of  principal,  interest,  fees and other  amounts) to the Assignor for
amounts  which  have  accrued to but  excluding  the  Effective  Date and to the
Assignee for amounts which have accrued from and after the Effective Date.


- -------------------
4  Describe Credit Agreement at option of Administrative Agent.
5  The concept of  "Foreign Lender" should be  conformed to the  section in  the
   Credit Agreement governing withholding taxes and gross-up.



                                  Exhibit A-4
                            364-DAY CREDIT AGREEMENT






          3. General Provisions. This Assignment and Assumption shall be binding
upon,  and inure to the  benefit  of, the  parties  hereto and their  respective
successors  and assigns.  This  Assignment and Assumption may be executed in any
number of counterparts, which together shall constitute one instrument. Delivery
of an executed counterpart of a signature page of this Assignment and Assumption
by telecopy shall be effective as delivery of a manually executed counterpart of
this Assignment and Assumption. This Assignment and Assumption shall be governed
by, and construed in accordance with, the law of the State of Texas.







                                  Exhibit A-5
                            364-DAY CREDIT AGREEMENT






                                    EXHIBIT B


                                     FORM OF

                          OPINION OF BORROWER'S COUNSEL



     To be in a form substantially  similar to the opinion of Borrower's counsel
pursuant to that certain 5-Year  Revolving  Credit Agreement dated as of June 9,
2004 among Pioneer Natural Resources Company, as Borrower,  JPMorgan Chase Bank,
as  Administrative  Agent,  JPMorgan  Chase Bank and Bank of America,  N.A.,  as
Issuing Banks and the Lenders party thereto, as amended.








                                   Exhibit B
                            364-DAY CREDIT AGREEMENT






                                    EXHIBIT C

                                     FORM OF

                               SUBSIDIARY GUARANTY

         This SUBSIDIARY GUARANTY  is dated as of [    ], 2004 made by [    ], a
[  ]  (the  "Subsidiary  Guarantor"),  in  favor  of  JPMorgan  Chase  Bank,  as
administrative  agent (in such  capacity,  together with its  successors in such
capacity,  the  "Administrative  Agent"),  for the  banks  and  other  financial
institutions  (the  "Lenders")  from time to time parties to the 364-Day  Credit
Agreement  dated as of September 28, 2004 (as amended, supplemented or otherwise
modified  from time to time,  the "Credit  Agreement"),  among  Pioneer  Natural
Resources Company (the "Borrower"),  the Administrative Agent, the Lenders party
thereto,  Bank of America, N.A.,  Barclays Bank Plc,  Wells Fargo Bank, National
Association,  and   Wachovia  Bank,  National  Association,  as Lender  and  Co-
Documentation  Agents,   and J.P. Morgan  Securities  Inc, as  Lead Arranger and
Sole Bookrunner.
                                 R E C I T A L S

         A. The Borrower has requested that the Lenders provide certain loans to
and extensions of credit on behalf of the Borrower.

         B. The Lenders have agreed  to make such loans and extensions of credit
subject to the terms and conditions of the Credit Agreement.

         C. It is a condition precedent to the obligation of the Lenders to make
their respective extensions of credit to the Borrower under the Credit Agreement
(or an ongoing  covenant of the Borrower  under the Credit  Agreement)  that the
Subsidiary  Guarantor shall have executed and delivered this Subsidiary Guaranty
to the Administrative Agent for the benefit of the Lenders.

         D. NOW,  THEREFORE,  in consideration  of the  premises  herein  and to
induce  the  Administrative  Agent  and the  Lenders  to enter  into the  Credit
Agreement  and to induce  the  Lenders to make their  respective  extensions  of
credit to the Borrower  thereunder,  the Subsidiary Guarantor hereby agrees with
the Administrative Agent, for the benefit of the Lenders, as follows:

         Section 1. Definitions.  Unless otherwise defined herein, terms defined
in the Credit Agreement  and used herein have  the meanings given to them in the
Credit Agreement. The following terms have the following meanings:

         "Liabilities"  means  the  collective  reference  to  the  payment  and
performance  when  due  of  all  indebtedness,   liabilities,   obligations  and
undertakings of the Borrower (including,  without limitation,  all Indebtedness)
of every kind or description  arising out of or outstanding  under,  advanced or
issued  pursuant to, or evidenced  by, the Loan  Documents,  including,  without
limitation,  the unpaid  principal  of and  interest  on the Loans and all other
obligations  and  liabilities of the Borrower  (including,  without  limitation,
interest  accruing at the then applicable rate provided in the Credit  Agreement
after the  maturity of the Loans and interest  accruing  after the filing of any
petition in bankruptcy, or the commencement of any insolvency, reorganization or


                                  Exhibit C-1
                            364-DAY CREDIT AGREEMENT






like  proceeding,  relating  to  the  Borrower,  whether  or  not  a  claim  for
post-filing  or  post-petition  interest is allowed in such  proceeding)  to the
Guaranteed Creditors, whether direct or indirect, absolute or contingent, due or
to become due, now existing or hereafter incurred, arising out of or outstanding
under, advanced or issued pursuant, or evidenced by, the Loan Documents, whether
on account of principal, interest, premium, reimbursement obligations,  payments
in respect of an early termination date, fees,  indemnities,  costs, expenses or
otherwise (including,  without limitation,  all costs, fees and disbursements of
counsel to the Guaranteed Creditors that are required to be paid by the Borrower
pursuant to the terms of any Loan Documents).

         "Guaranteed  Creditors"   means  the   collective  reference   to   the
Administrative Agent and the Lenders.

         Section 2.  Rules of Interpretation.  Section 1.03 and  Section 1.04 of
the Credit Agreement are hereby incorporated herein by reference and shall apply
to this Agreement, mutatis mutandis.

         Section 3.    Guaranty   of   Payments.    The   Subsidiary   Guarantor
unconditionally  and  irrevocably  guarantees  to the  Guaranteed  Creditors the
punctual payment of the Liabilities,  when the same are due and payable, whether
on demand,  at stated  maturity,  by acceleration or otherwise,  and whether for
principal, interest, fees, expenses, indemnification or otherwise; provided that
the maximum  liability of the Subsidiary  Guarantor  shall not exceed the amount
which can be guaranteed by the Subsidiary Guarantor under applicable federal and
state laws relating to the insolvency of debtors; provided, further, however, it
is understood that the  obligations of the Borrower to the Guaranteed  Creditors
may at any time and from time to time  exceed the  liability  of the  Subsidiary
Guarantor   hereunder  without  impairing  this  Subsidiary   Guaranty  and  the
Subsidiary  Guarantor and the Guaranteed Creditors agree, as between themselves,
that regardless of the manner of application of payments made by the Borrower to
the Guaranteed Creditors,  all such payments shall be deemed to be applied first
to the portion of the  obligations of the Borrower to the  Guaranteed  Creditors
which are not guaranteed  hereunder and last to the portion of such  obligations
which are  guaranteed  hereunder.  This  Subsidiary  Guaranty  is a guaranty  of
payment  and not of  collection  only.  The  Guaranteed  Creditors  shall not be
required to exhaust any right or remedy or take any action  against the Borrower
or any other person or entity or any collateral. The Subsidiary Guarantor agrees
that, as between the  Subsidiary  Guarantor and the  Guaranteed  Creditors,  the
Liabilities  may be  declared  to be due and  payable  for the  purposes of this
Subsidiary Guaranty  notwithstanding  any stay,  injunction or other prohibition
which may prevent,  delay or vitiate any declaration as regards the Borrower and
that in the event of a declaration  or attempted  declaration,  the  Liabilities
shall  immediately  become due and payable by the  Subsidiary  Guarantor for the
purposes  of this  Subsidiary  Guaranty.  No payment  made by any Obligor or any
other  Person or received or  collected  by the  Guaranteed  Creditors  from any
Obligor or any other Person by virtue of any action or proceeding or any set-off
or appropriation or application at any time or from time to time in reduction of
or in payment of the Liabilities shall be deemed to modify,  reduce,  release or
otherwise  affect the  liability of any  Subsidiary  Guarantor  hereunder  which
shall,  notwithstanding  any such  payment  (other than any payment made by such
Subsidiary  Guarantor in respect of the  Liabilities or any payment  received or
collected from such Subsidiary Guarantor in respect of the Liabilities),  remain


                                  Exhibit C-2
                            364-DAY CREDIT AGREEMENT






liable  for the  Liabilities  up to the  maximum  liability  of such  Subsidiary
Guarantor  hereunder  until the  Liabilities are paid in full in cash and all of
the Commitments are terminated.

         Section 4.   Guaranty  Absolute  and  Unconditional.   The   Subsidiary
Guarantor  guarantees that the Liabilities  shall be paid strictly in accordance
with the terms of the Loan Documents.  The liability of the Subsidiary Guarantor
under this Subsidiary  Guaranty is absolute and  unconditional  irrespective of:
(a) any change in the time,  manner or place of payment of, or in any other term
of, all or any of the Loan Documents or  Liabilities,  or any other amendment or
waiver of or any consent to departure from any of the terms of any Loan Document
or  Liabilities,  including  any  increase  or  decrease in the rate of interest
thereon;  (b) any  release or  amendment  or waiver of, or consent to  departure
from, any other guaranty or support document,  or any exchange,  release for all
or any of the Loan  Documents  or  Liabilities;  (c) any  present or future law,
regulation or order of any jurisdiction  (whether of right or in fact) or of any
agency thereof purporting to reduce, amend,  restructure or otherwise affect any
term of any Loan  Document  or  Liabilities;  (d) without  being  limited by the
foregoing,  any lack of  validity  or  enforceability  of any Loan  Document  or
Liabilities;  (e)  the  insolvency,   bankruptcy  arrangement,   reorganization,
adjustment, composition,  liquidation,  disability, dissolution or lack of power
of the  Borrower  , any  Subsidiary  Guarantor  or any other  Person at any time
liable  for  the  payment  of all or  part  of the  Liabilities,  including  any
discharge of, or bar or stay against  collecting,  any Liability (or any part of
them or interest  therein) in or as a result of such  proceeding;  (f) any sale,
lease or  transfer  of any or all of the  assets  of the  Borrower  or any other
Subsidiary Guarantor,  or any changes in the shareholders of the Borrower or the
Subsidiary  Guarantor;  any change in the  corporate  existence  (including  its
constitution,  laws, rules, regulations or power), structure or ownership of any
Obligor;  (g) the absence of any attempt to collect the  Obligations or any part
of them from any Obligor; (h) any sale, exchange,  waiver,  surrender or release
of any guarantee or right of offset at any time held by the Guaranteed Creditors
for the payment of the Liabilities;  (i) the addition, from time to time, of any
guarantors,  makers  or  endorsers  of the  Liabilities,  or of  any  additional
security or  collateral  for the payment of the  Liabilities;  and (j) any other
setoff,  defense or counterclaim  whatsoever,  or any other  circumstance or act
whatsoever with respect to the Loan Documents or the  transactions  contemplated
thereby  which  might  constitute  or be  construed  to  constitute  a legal  or
equitable  defense  available  to, or discharge of, the Borrower or a Subsidiary
Guarantor under the Credit Agreement or this Subsidiary Guaranty,  in bankruptcy
or in any  other  instance  (in  any  case,  except  a  defense  of  payment  or
performance,  whether based on contract,  tort or any other theory). When making
any demand hereunder or otherwise  pursuing their rights and remedies  hereunder
against any Subsidiary  Guarantor,  the  Guaranteed  Creditors may, but shall be
under no obligation to, join or make a similar demand on or otherwise  pursue or
exhaust  such rights and  remedies as they may have  against the  Borrower,  any
other Subsidiary  Guarantor or any other Person or against any guarantee for the
Liabilities or any right of offset with respect thereto,  and any failure by the
Guaranteed  Creditors  to make any such  demand,  to pursue such other rights or
remedies or to collect any  payments  from the  Borrower,  any other  Subsidiary
Guarantor  or any  other  Person or to  realize  upon any such  guarantee  or to
exercise  any such right of offset,  or any release of the  Borrower,  any other
Subsidiary  Guarantor  or any  other  Person or any such  guarantee  or right of
offset,  shall  not  relieve  any  Subsidiary  Guarantor  of any  obligation  or
liability  hereunder,  and shall not impair or affect  the rights and  remedies,


                                  Exhibit C-3
                            364-DAY CREDIT AGREEMENT






whether  express,  implied or  available  as a matter of law, of the  Guaranteed
Creditors  against any Subsidiary  Guarantor.  For the purposes  hereof "demand"
shall include the commencement and continuance of any legal proceedings.

         Section 5.   Guaranty  Irrevocable.   This  Subsidiary  Guaranty  is  a
continuing  guaranty of all Liabilities now or hereafter existing under the Loan
Documents and shall remain in full force and effect until payment in full of all
Liabilities and other amounts  payable under this Subsidiary  Guaranty and until
the Loan Documents are no longer in effect.

         Section 6. Reinstatement. This Subsidiary Guaranty shall continue to be
effective, or be reinstated,  as the case may be, if at any time any payment, or
any part thereof,  of any of the  Liabilities  is rescinded or must otherwise be
returned by the Guaranteed Creditors on the insolvency, bankruptcy, dissolution,
liquidation or reorganization of the Borrower or any Subsidiary  Guarantor,  all
as though the payment had not been made.

         Section 7.  No  Subrogation.  Notwithstanding  any payment  made by any
Subsidiary  Guarantor  hereunder or any set-off or  application  of funds of any
Subsidiary Guarantor by the Guaranteed Creditors,  no Subsidiary Guarantor shall
be entitled to be  subrogated to any of the rights of the  Guaranteed  Creditors
against  the  Borrower  or any  other  Subsidiary  Guarantor  or any  collateral
security or guarantee or right of offset held by any Guaranteed Creditor for the
payment  of the  Liabilities,  nor shall  any  Subsidiary  Guarantor  seek or be
entitled to seek any  indemnity,  exoneration,  participation,  contribution  or
reimbursement from the Borrower or any other Subsidiary  Guarantor in respect of
payments made by such Subsidiary Guarantor hereunder, until all amounts owing to
the  Guaranteed  Creditors on account of the  Liabilities  are  irrevocably  and
indefeasibly paid in full in cash and all of the Commitments are terminated.  If
any  amount  shall  be paid  to any  Subsidiary  Guarantor  on  account  of such
subrogation  rights at any time when all of the Liabilities  shall not have been
irrevocably and indefeasibly  paid in full in cash or any of the Commitments are
in effect,  such amount shall be held by such Subsidiary  Guarantor in trust for
the Guaranteed Creditors,  and shall,  forthwith upon receipt by such Subsidiary
Guarantor, be turned over to the Administrative Agent in the exact form received
by such Subsidiary  Guarantor (duly indorsed by such Subsidiary Guarantor to the
Administrative  Agent,  if  required),  to be applied  against the  Liabilities,
whether matured or unmatured, as determined by the Administrative Agent.

         Section 8.  Subordination.  Without  limiting the Guaranteed Creditors'
rights under any other  agreement,  any liabilities  owed by the Borrower to the
Subsidiary  Guarantor in  connection  with any  extension of credit or financial
accommodation by the Subsidiary Guarantor to or for the account of the Borrower,
including but not limited to interest accruing at the agreed contract rate after
the commencement of a bankruptcy or similar proceeding,  are hereby subordinated
to the Liabilities  upon the occurrence of an Event of Default,  and, in such an
event such  liabilities  of the  Borrower to the  Subsidiary  Guarantor,  if the
Administrative Agent so requests,  shall be collected,  enforced and received by
the Subsidiary  Guarantor as trustee for the  Guaranteed  Creditors and shall be
paid  over  to the  Administrative  Agent  for  the  benefit  of the  Guaranteed
Creditors on account of the Liabilities  (but only to the extent due and payable
but without  reducing or affecting in any manner the liability of the Subsidiary
Guarantor under the other provisions of this Subsidiary Guaranty.


                                  Exhibit C-4
                            364-DAY CREDIT AGREEMENT







         Section 9. Payments Generally. All payments by the Subsidiary Guarantor
shall be made in the  manner,  at the place and in the  currency  (the  "Payment
Currency")  required  by the Loan  Documents;  provided,  however,  that (if the
Payment  Currency is other than U.S.  dollars) the Subsidiary  Guarantor may, at
its option (or, if for any reason whatsoever the Subsidiary  Guarantor is unable
to effect payments in the foregoing  manner,  the Subsidiary  Guarantor shall be
obligated to) pay to the  Administrative  Agent at its principal office, for the
benefit of the  Guaranteed  Creditors,  the  equivalent  amount in U.S.  dollars
computed  at the  selling  rate of the  Administrative  Agent or a selling  rate
chosen by the  Administrative  Agent, most recently in effect on or prior to the
date the Liability  becomes due, for cable transfers of the Payment  Currency to
the place where the  Liability is payable.  In any case in which the  Subsidiary
Guarantor makes or is obligated to make payment in U.S. dollars,  the Subsidiary
Guarantor  shall  hold the  Administrative  Agent and the  Guaranteed  Creditors
harmless from any loss incurred by the  Administrative  Agent or the  Guaranteed
Creditors  arising  from any change in the value of U.S.  dollars in relation to
the Payment Currency between the date the Liability becomes due and the date the
Guaranteed  Creditors are actually  able,  following the  conversion of the U.S.
dollars  paid  by  the  Subsidiary  Guarantor  into  the  Payment  Currency  and
remittance  of such  Payment  Currency  to the place  where  such  Liability  is
payable, to apply such Payment Currency to such Liability.

         Section 10. Certain Taxes. The Subsidiary Guarantor further agrees that
all payments to be made hereunder  shall be made without setoff or  counterclaim
and free and clear of, and without  deduction  for,  any  Indemnified  Taxes and
Other  Taxes.  If any  Indemnified  Taxes and Other  Taxes  are  required  to be
withheld from any amounts payable to the Administrative Agent for the benefit of
the Guaranteed Creditors hereunder, the amounts so payable to the Administrative
Agent for the benefit of the  Guaranteed  Creditors  shall be  increased  to the
extent  necessary to yield to the  Guaranteed  Creditors  (after  payment of all
Indemnified  Taxes and Other  Taxes) the amounts  payable  hereunder in the full
amounts so to be paid.  Whenever any Indemnified  Taxes and Other Taxes are paid
by the Subsidiary Guarantor, as promptly as possible thereafter,  the Subsidiary
Guarantor  shall  send the  Administrative  Agent an  official  receipt  showing
payment thereof,  together with such additional  documentary  evidence as may be
required from time to time by the Administrative Agent.

         Section 11.  Representations and Warranties.  The Subsidiary  Guarantor
represents  and  warrants  that:  (a)  this  Subsidiary  Guaranty  (i) has  been
authorized by all  necessary  corporate  action;  (ii) except as to matters that
could not reasonably be expected to result in a Material  Adverse  Effect,  does
not violate any agreement,  instrument,  law,  regulation or order applicable to
the  Subsidiary  Guarantor;  (iii) does not require the consent or approval  of,
registration or filing with, or any other action by, any Governmental Authority;
and (iv) is the legal, valid and binding obligation of the Subsidiary  Guarantor
enforceable  against the  Subsidiary  Guarantor  in  accordance  with its terms,
subject to applicable bankruptcy,  insolvency,  reorganization,  moratorium,  or
other  laws  affecting  creditors'  rights  generally  and  subject  to  general
principles of equity regardless of whether  considered in a proceeding in equity
or at law; and (b) in executing and delivering  this  Subsidiary  Guaranty,  the
Subsidiary Guarantor has (i) without reliance on the Administrative Agent or the
Guaranteed  Creditors or any information  received from the Administrative Agent
or the  Guaranteed  Creditors and based upon such  documents and  information it
deems  appropriate,  made  an  independent  investigation  of  the  transactions
contemplated  hereby  and  the  Borrower,   the  Borrower's  business,   assets,
operations,   prospects  and   condition,   financial  or  otherwise,   and  any


                                  Exhibit C-5
                            364-DAY CREDIT AGREEMENT






circumstances  which  may bear  upon  such  transactions,  the  Borrower  or the
obligations and risks undertaken  herein with respect to the  Liabilities;  (ii)
adequate  means to obtain from the  Borrower on a continuing  basis  information
concerning  the  Borrower;  (iii)  has  full  and  complete  access  to the Loan
Documents  and  any  other  documents  executed  in  connection  with  the  Loan
Documents;  and (iv) not  relied and will not rely upon any  representations  or
warranties of the Administrative  Agent or the Guaranteed Creditors not embodied
herein or any acts heretofore or hereafter taken by the Administrative  Agent or
the  Guaranteed  Creditors  (including  but not  limited  to any  review  by the
Administrative  Agent  or  the  Guaranteed  Creditors  of  the  affairs  of  the
Borrower).

         Section 12.  Remedies   Generally.   The  remedies   provided  in  this
Subsidiary Guaranty are cumulative and not exclusive of any remedies provided by
law.

         Section 13.  Formalities.  The Subsidiary Guarantor waives presentment,
notice of dishonor, protest, notice of acceptance of this Subsidiary Guaranty or
incurrence of  any Liability and any other  formality with respect to any of the
Liabilities or this Subsidiary Guaranty.

         Section 14. Amendments and Waivers to Guaranty.  No amendment or waiver
of any provision of this  Subsidiary  Guaranty,  nor consent to any departure by
the Subsidiary Guarantor  therefrom,  shall be effective unless it is in writing
and signed by each of the Guaranteed  Creditors,  and then the waiver or consent
shall be effective  only in the specific  instance and for the specific  purpose
for which given. No failure on the part of the Guaranteed Creditors to exercise,
and no delay in  exercising,  any right  under this  Subsidiary  Guaranty  shall
operate as a waiver or  preclude  any other or further  exercise  thereof or the
exercise of any other right. Each Subsidiary Guarantor hereby waives any and all
notice of the creation,  renewal, extension or accrual of any of the Liabilities
and  notice  of or proof of  reliance  by the  Guaranteed  Creditors  upon  this
Subsidiary Guaranty or acceptance of this Subsidiary Guaranty;  the Liabilities,
and any of them, shall  conclusively be deemed to have been created,  contracted
or incurred,  or renewed,  extended,  amended or waived,  in reliance  upon this
Subsidiary  Guaranty  and  no  notice  of  creation  of the  Liabilities  or any
extension  of credit  already or  hereafter  contracted  by or  extended  to the
Borrower need be given to any Subsidiary Guarantor; and all dealings between the
Borrower  and  any of the  Subsidiary  Guarantors,  on the  one  hand,  and  the
Guaranteed Creditors, on the other hand, likewise shall be conclusively presumed
to have been had or consummated in reliance upon this Subsidiary Guaranty.  Each
Subsidiary Guarantor waives diligence,  presentment, protest, demand for payment
and  notice of  default  or  nonpayment  to or upon the  Borrower  or any of the
Subsidiary Guarantors with respect to the Liabilities.

         Section 15.  Expenses.  The Subsidiary  Guarantor shall  reimburse  the
Administrative  Agent for the benefit of the Guaranteed  Creditors on demand for
all reasonable  out-of-pocket  expenses (including without limitation reasonable
fees,  charges and  disbursements  of any counsel for the Guaranteed  Creditors)
incurred by the Guaranteed  Creditors in connection with the enforcement of this
Subsidiary  Guaranty.  Attorneys' fees reimbursed by the Subsidiary Guarantor in
connection  with this  Subsidiary  Guaranty  shall be for a single  law firm per
country (unless conflicts (including conflicts between the Administrative Agent,
the  Lead  Arranger  and the  other  Lenders  as  determined  in the  reasonable


                                  Exhibit C-6
                            364-DAY CREDIT AGREEMENT






discretion  of the Required  Lenders)  otherwise  prohibit the  engagement  of a
single law firm) plus a single local  counsel in each  jurisdiction  where local
counsel is reasonably required.

         Section 16.  Assignment.  This Subsidiary Guaranty shall be binding on,
and shall inure to the benefit of the Subsidiary  Guarantor,  the Administrative
Agent and the Guaranteed Creditors and their respective  successors and assigns;
provided that the Subsidiary  Guarantor may not assign or transfer its rights or
obligations under this Subsidiary  Guaranty.  Without limiting the generality of
the  foregoing:  (a) the  obligations  of the  Subsidiary  Guarantor  under this
Subsidiary Guaranty shall continue in full force and effect and shall be binding
on any  successor  partnership  and on previous  partners  and their  respective
estates if the Subsidiary  Guarantor is a partnership,  regardless of any change
in the  partnership  as a result of death  retirement or otherwise;  and (b) the
Guaranteed  Creditors may assign,  sell  participations in or otherwise transfer
their rights under the Loan  Documents to another person or entity to the extent
expressly  permitted  by  Section  9.04 of the Credit  Agreement,  and the other
person or entity  shall then become  vested  with all the rights  granted to the
Guaranteed Creditors in this Subsidiary Guaranty or otherwise.

         Section 17.  Captions.  The headings  and captions  in this  Subsidiary
Guaranty are for  convenience  only and shall not affect the  interpretation  or
construction of this Subsidiary Guaranty.

         Section 18.  Governing Law,  Etc.  THIS  SUBSIDIARY GUARANTY  SHALL  BE
GOVERNED BY THE LAW OF THE STATE OF TEXAS. THE SUBSIDIARY  GUARANTOR CONSENTS TO
THE  NONEXCLUSIVE  JURISDICTION AND VENUE OF THE STATE OR FEDERAL COURTS LOCATED
IN THE STATE OF TEXAS.  SERVICE OF PROCESS  BY THE BANK IN  CONNECTION  WITH ANY
SUCH  DISPUTE  SHALL  BE  BINDING  ON THE  SUBSIDIARY  GUARANTOR  IF SENT TO THE
SUBSIDIARY  GUARANTOR BY REGISTERED  MAIL AT THE ADDRESS  SPECIFIED  BELOW OR AS
OTHERWISE  SPECIFIED  BY  THE  SUBSIDIARY  GUARANTOR  FROM  TIME  TO  TIME.  THE
SUBSIDIARY  GUARANTOR WAIVES ANY RIGHT THE SUBSIDIARY GUARANTOR MAY HAVE TO JURY
TRIAL IN ANY ACTION  RELATED TO THIS  SUBSIDIARY  GUARANTY  OR THE  TRANSACTIONS
CONTEMPLATED  HEREBY AND FURTHER WAIVES ANY RIGHT TO INTERPOSE ANY  COUNTERCLAIM
RELATED TO THIS SUBSIDIARY  GUARANTY OR THE TRANSACTIONS  CONTEMPLATED HEREBY IN
ANY SUCH ACTION.  TO THE EXTENT THAT THE  SUBSIDIARY  GUARANTOR HAS OR HEREAFTER
MAY  ACQUIRE  ANY  IMMUNITY  FROM  JURISDICTION  OF ANY  COURT OR FROM ANY LEGAL
PROCESS  (WHETHER  FROM  SERVICE  OR  NOTICE,   ATTACHMENT  PRIOR  TO  JUDGMENT,
ATTACHMENT  IN AID OF EXECUTION  OF A JUDGMENT,  EXECUTION  OR  OTHERWISE),  THE
SUBSIDIARY  GUARANTOR HEREBY  IRREVOCABLY WAIVES SUCH IMMUNITY IN RESPECT OF ITS
OBLIGATIONS UNDER THIS SUBSIDIARY GUARANTY.

         Section 19.   Integration;   Effectiveness.   THIS  WRITTEN  SUBSIDIARY
GUARANTY EMBODIES THE ENTIRE AGREEMENT AND UNDERSTANDING BETWEEN THE LENDERS AND
THE SUBSIDIARY  GUARANTOR AND SUPERSEDES ALL OTHER AGREEMENTS AND UNDERSTANDINGS
BETWEEN  SUCH  PARTIES  RELATING  TO THE SUBJECT  MATTER  HEREOF.  THIS  WRITTEN


                                  Exhibit C-7
                            364-DAY CREDIT AGREEMENT






SUBSIDIARY  GUARANTY  REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY
NOT BE  CONTRADICTED BY EVIDENCE OF PRIOR,  CONTEMPORANEOUS,  OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL  AGREEMENTS  BETWEEN THE
PARTIES.


         IN WITNESS WHEREOF, the Subsidiary Guarantor has caused this Subsidiary
Guaranty to be duly  executed and delivered by its duly authorized officer as of
the date first above written.

                                    [COMPANY]


                                    By:

                                    Name:
                                    Title:


                                    Address:
                                    -------




                                  Exhibit C-8
                            364-DAY CREDIT AGREEMENT






                                    EXHIBIT D

                                     FORM OF

                                 PROMISSORY NOTE

$[      ]                                                   [       ], 200[  ]

     FOR  VALUE  RECEIVED,   Pioneer  Natural  Resources   Company,  a  Delaware
corporation,  (the  "Borrower")  hereby promises to pay to the order of [ ] (the
"Lender"),  at the principal office of JPMorgan Chase Bank (the  "Administrative
Agent"),  at [ ], the principal sum of [ ] Dollars ($[ ]) (or such lesser amount
as shall equal the aggregate  unpaid  principal  amount of the Loans made by the
Lender to the Borrower under the Credit Agreement,  as hereinafter  defined), in
lawful money of the United States of America and in immediately available funds,
on the dates and in the principal amounts provided in the Credit Agreement,  and
to pay  interest  on the  unpaid  principal  amount of each such  Loan,  at such
office,  in like money and funds, for the period  commencing on the date of such
Loan until  such Loan  shall be paid in full,  at the rates per annum and on the
dates provided in the Credit Agreement.

     The date, amount, Type, interest rate, Interest Period and maturity of each
Loan made by the Lender to the Borrower, and each payment made on account of the
principal  thereof,  shall be recorded by the Lender on its books and,  prior to
any  transfer of this Note,  may be endorsed  by the Lender on  schedules  to be
attached hereto or any continuation thereof or on any separate record maintained
by the Lender.  Failure to make any such notation or to attach a schedule  shall
not affect any Lender's or the  Borrower's  rights or  obligations in respect of
such Loans or affect the validity of such transfer by any Lender of this Note.

     This Note is one of the Notes referred to in the 364-Day  Credit  Agreement
dated as of September 28, 2004 among the Borrower, the Administrative Agent, and
the other agents and lenders  signatory  thereto  (including  the  Lender),  and
evidences Loans made by the Lender thereunder (such Credit Agreement as the same
may be  amended,  supplemented  or  restated  from  time to  time,  the  "Credit
Agreement").  Capitalized  terms used in this Note have the respective  meanings
assigned to them in the Credit Agreement.

     This Note is issued pursuant to the Credit Agreement and is entitled to the
benefits provided for in the Credit Agreement and the other Loan Documents.  The
Credit Agreement provides for the acceleration of the maturity of this Note upon
the occurrence of certain  events,  for  prepayments of Loans upon the terms and
conditions specified therein and other provisions relevant to this Note.

     THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE  WITH, THE LAWS
OF THE STATE OF TEXAS.


                                  Exhibit D-1
                            364-DAY CREDIT AGREEMENT








     IN WITNESS  WHEREOF,  the  Borrower  has caused this  Agreement  to be duly
executed as of the day and year first above written.


                                     PIONEER NATURAL RESOURCES COMPANY


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



                                  Exhibit D-2
                            364-DAY CREDIT AGREEMENT