Document:

<PAGE>
                                                                    Exhibit 10.1

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

                                CREDIT AGREEMENT

                                   ----------

                               AREP OIL & GAS LLC,
                                   as Borrower

                               CITICORP USA, INC.,
                             as Administrative Agent

                      BEAR STEARNS CORPORATE LENDING INC.,
                              as Syndication Agent

                       and CERTAIN FINANCIAL INSTITUTIONS,
                                   as Lenders

                                   ----------

             $500,000,000 Senior Secured Revolving Credit Agreement

                                December 20, 2005

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

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
<S>                                                                         <C>
ARTICLE I - Definitions and References...................................     1
   Section 1.1.   Defined Terms..........................................     1
   Section 1.2.   Exhibits and Schedules; Additional Definitions.........    27
   Section 1.3.   Terms Generally; References and Titles.................    27
   Section 1.4.   Calculations and Determinations........................    28
   Section 1.5.   Joint Preparation; Construction of Indemnities and
                     Releases............................................    28

ARTICLE II - The Loans and Letters of Credit.............................    28
   Section 2.1.   Commitments to Lend; Notes.............................    28
   Section 2.2.   Requests for New Loans.................................    29
   Section 2.3.   Continuations and Conversions of Existing Loans........    30
   Section 2.4.   Use of Proceeds........................................    31
   Section 2.5.   Interest Rates and Fees; Payment Dates.................    31
   Section 2.6.   Optional Prepayments...................................    32
   Section 2.7.   Mandatory Prepayments..................................    33
   Section 2.8.   Initial Borrowing Base.................................    34
   Section 2.9.   Subsequent Determinations of Borrowing Base............    34
   Section 2.10.  Letters of Credit......................................    36
   Section 2.11.  Requesting Letters of Credit...........................    37
   Section 2.12.  Reimbursement and Participations.......................    37
   Section 2.13.  Letter of Credit Fees..................................    39
   Section 2.14.  No Duty to Inquire.....................................    39
   Section 2.15.  LC Collateral..........................................    40
   Section 2.16.  Obligations of Lenders Several.........................    41
   Section 2.17.  Increase in Commitments................................    41

ARTICLE III - Payments to Lenders........................................    42
   Section 3.1.   General Procedures.....................................    42
   Section 3.2.   Increased Costs........................................    44
   Section 3.3.   Illegality.............................................    45
   Section 3.4.   Funding Losses.........................................    45
   Section 3.5.   Taxes..................................................    45
   Section 3.6.   Alternative Rate of Interest...........................    47
   Section 3.7.   Mitigation Obligations; Replacement of Lenders.........    48
   Section 3.8.   Payments by Borrower; Presumptions by Administrative
                     Agent...............................................    49

ARTICLE IV - Conditions Precedent to Lending.............................    49
   Section 4.1.   Documents to be Delivered..............................    49
   Section 4.2.   Additional Conditions Precedent........................    51

ARTICLE V - Representations and Warranties...............................    52
</TABLE>

                                        i

<PAGE>

<TABLE>
<S>                                                                         <C>
   Section 5.1.   No Default.............................................    52
   Section 5.2.   Organization and Good Standing.........................    52
   Section 5.3.   Authorization..........................................    52
   Section 5.4.   No Conflicts, Contravention or Consents; No Violation
                     of Rights...........................................    52
   Section 5.5.   Enforceable Obligations................................    53
   Section 5.6.   Initial Financial Statements...........................    53
   Section 5.7.   Other Obligations and Restrictions.....................    53
   Section 5.8.   Full Disclosure........................................    53
   Section 5.9.   Litigation.............................................    54
   Section 5.10.  Labor Disputes and Acts of God.........................    54
   Section 5.11.  ERISA Plans and Liabilities............................    54
   Section 5.12.  Environmental and Other Laws...........................    54
   Section 5.13.  Names and Places of Business...........................    55
   Section 5.14.  Subsidiaries...........................................    55
   Section 5.15.  Government Regulation..................................    55
   Section 5.16.  Solvency...............................................    55
   Section 5.17.  Title to Properties; Licenses..........................    55
   Section 5.19.  Leases and Contracts; Performance of Obligations.......    56
   Section 5.20.  Sale of Production.....................................    57
   Section 5.21.  Operation of Oil and Gas Properties....................    58
   Section 5.22.  Ad Valorem and Severance Taxes; Litigation.............    58
   Section 5.23.  Internal Control Event.................................    58
   Section 5.24.  Separateness of Each Credit Party......................    58

ARTICLE VI - Affirmative Covenants of Borrower...........................    59
   Section 6.1.   Payment and Performance................................    59
   Section 6.2.   Books, Financial Statements and Reports................    59
   Section 6.3.   Other Information and Inspections......................    61
   Section 6.4.   Notice of Material Events and Change of Name or
                     Address.............................................    62
   Section 6.5.   Maintenance of Properties..............................    62
   Section 6.6.   Maintenance of Existence and Qualifications............    63
   Section 6.7.   Payment of Trade Liabilities, Taxes, etc...............    63
   Section 6.8.   Insurance..............................................    63
   Section 6.9.   Performance on Borrower's Behalf.......................    64
   Section 6.10.  Interest...............................................    64
   Section 6.11.  Compliance with Agreements and Law.....................    64
   Section 6.12.  Environmental Matters; Environmental Reviews...........    64
   Section 6.13.  Actions after the Initial Equity Offering..............    65
   Section 6.14.  Bank Accounts; Offset..................................    65
   Section 6.15.  Guaranties.............................................    66
   Section 6.16.  Production Proceeds....................................    66
   Section 6.17.  Collateral.............................................    66
   Section 6.18.  Separateness of Each Credit Party......................    67

ARTICLE VII - Negative Covenants of Borrower.............................    68
   Section 7.1.   Indebtedness...........................................    68
</TABLE>

                                       ii

<PAGE>

<TABLE>
<S>                                                                         <C>
   Section 7.2.   Limitation on Liens....................................    69
   Section 7.3.   Hedging Contracts......................................    69
   Section 7.4.   Limitation on Mergers, Issuances of Securities.........    70
   Section 7.5.   Limitation on Sales of Property........................    71
   Section 7.6.   Limitation on Distributions; Prepayments of Allowed
                     Second Lien/Unsecured Indebtedness..................    71
   Section 7.7.   Limitation on Investments and New Businesses...........    73
   Section 7.8.   Limitation on Credit Extensions........................    73
   Section 7.9.   Transactions with Affiliates; No Prepayments or
                     Amendments of Restated NEGO Credit Facility.........    73
   Section 7.10.  Prohibited Contracts...................................    73
   Section 7.11.  Financial Covenants....................................    74

ARTICLE VIII - Events of Default and Remedies............................    74
   Section 8.1.   Events of Default......................................    74
   Section 8.2.   Remedies...............................................    76
   Section 8.3.   Application of Proceeds after Acceleration.............    76

ARTICLE IX - Administrative Agent........................................    77
   Section 9.1.   Appointment and Authority..............................    77
   Section 9.2.   Reliance by Administrative Agent.......................    78
   Section 9.3.   Non-Reliance on Administrative Agent and Other
                     Lenders.............................................    78
   Section 9.4.   Rights as a Lender.....................................    78
   Section 9.5.   Sharing of Set-Offs and Other Payments.................    79
   Section 9.6.   Investments............................................    79
   Section 9.7.   Resignation of Administrative Agent....................    79
   Section 9.8.   Delegation of Duties...................................    80
   Section 9.9.   No Other Duties, etc...................................    80

ARTICLE X - Miscellaneous................................................    80
   Section 10.1.  Waivers and Amendments; Acknowledgments................    80
   Section 10.2.  Survival of Agreements; Cumulative Nature..............    83
   Section 10.3.  Notices; Effectiveness; Electronic Communication.......    83
   Section 10.4.  Expenses; Indemnity; Damage Waiver.....................    85
   Section 10.5.  Successors and Assigns; Joint and Several Liability....    86
   Section 10.6.  Confidentiality........................................    89
   Section 10.7.  Governing Law; Submission to Process...................    89
   Section 10.8.  Limitation on Interest.................................    90
   Section 10.9.  Termination; Limited Survival..........................    91
   Section 10.10. Severability...........................................    91
   Section 10.11. Counterparts; Integration; Effectiveness...............    91
   Section 10.12. Waiver of Jury Trial, Punitive Damages, etc............    91
   Section 10.13. USA PATRIOT Act Notice.................................    92
</TABLE>

                                       iii

<PAGE>

Schedules and Exhibits:

Schedule 1 - Disclosure Schedule
Schedule 2 - Security Schedule
Schedule 3 - Insurance Schedule
Schedule 4 - Allowed Second Lien/Unsecured Indebtedness
Schedule 5 - Lenders Schedule
Schedule 6 - Required Closing Date Hedges

Exhibit A - Form of Promissory Note
Exhibit B - Form of Borrowing Notice
Exhibit C - Form of Continuation/Conversion Notice
Exhibit D - Form of Certificate Accompanying Financial Statements
Exhibit E - Assignment and Assumption Agreement
Exhibit F - Letter of Credit Application
Exhibit G - Commitment Increase Agreement

                                       iv

<PAGE>

                                CREDIT AGREEMENT

     THIS CREDIT AGREEMENT is made as of December 20, 2005, by and among AREP
Oil & Gas LLC, a Delaware limited liability company ("Borrower"), Citicorp USA,
Inc., individually and as administrative agent ("Administrative Agent") and as
LC Issuer, Bear Stearns Corporate Lending Inc., as syndication agent, and the
Lenders referred to below.

                                   WITNESSETH:

     In consideration of the mutual covenants and agreements contained herein in
consideration of the loans which may hereafter be made by Lenders and the
Letters of Credit which may be made available by LC Issuer to Borrower, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties hereto do hereby agree as follows:

                     ARTICLE I - Definitions and References

     Section 1.1 Defined Terms. As used in this Agreement, each of the following
terms has the meaning given to such term in this Section 1.1 or in the sections
and subsections referred to below:

     "Adjusted Base Rate" means, on any day, the Base Rate for such day plus the
Base Rate Margin for such day, provided that the Adjusted Base Rate charged by
any Person shall never exceed the Highest Lawful Rate.

     "Adjusted Eurodollar Rate" means, for any Eurodollar Loan for any day
during any Interest Period therefor, the rate per annum equal to the sum of (a)
the Eurodollar Margin for such day plus (b) the rate per annum (rounded upwards,
if necessary, to the nearest 1/100 of 1%) determined by Administrative Agent to
be equal to the quotient obtained by dividing (i) the Eurodollar Rate for such
Eurodollar Loan for such Interest Period by (ii) 1 minus the Reserve Requirement
for such Eurodollar Loan for such Interest Period, provided that no Adjusted
Eurodollar Rate charged by any Person shall ever exceed the Highest Lawful Rate.
The Adjusted Eurodollar Rate for any Eurodollar Loan shall change whenever the
Eurodollar Margin or the Reserve Requirement changes.

     "Administrative Agent" means Citicorp USA, Inc., as Administrative Agent
hereunder, and its successors in such capacity.

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

                                        1

<PAGE>

     "Aggregate Commitments" means, at any time, the sum of the Commitments then
in effect. On the date hereof the Aggregate Commitments total $335,000,000 but
are subject to increase hereafter pursuant to Section 2.17.

     "Agreement" means this Credit Agreement.

     "Allowed Second Lien/Unsecured Indebtedness" means Indebtedness for
borrowed money under the "Bonds" or the "Second Lien Notes" described in
Schedule 4 hereto, provided that all applicable conditions and requirements
described in such Schedule have been satisfied at the time Borrower becomes
liable thereunder.

     "Applicable Lending Office" means, with respect to each Lender, such
Lender's Domestic Lending Office in the case of Base Rate Loans and such
Lender's Eurodollar Lending Office in the case of Eurodollar Loans.

     "Applicable Utilization Level" means on any date the level set forth below
that corresponds to the percentage, at the close of business on such day,
equivalent to the (i) Facility Usage divided by (ii) the Borrowing Base (the
"Utilization Percent"):

<TABLE>
<CAPTION>
Applicable Utilization Level          Utilization Percent
----------------------------   --------------------------------
<S>                            <C>
          Level I                        less than 33%

          Level II             greater than or equal to 33% but
                                         less than 66%

          Level III            greater than or equal to 66% but
                                         less than 80%

          Level IV               Greater than or equal to 80%
</TABLE>

     "Approved Fund" means any Fund 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.

     "AREH" means American Real Estate Holdings Limited Partnership, a Delaware
limited partnership.

     "AREP" means American Real Estate Partners, L.P., a Delaware limited
partnership.

     "Assignment and Assumption" means an assignment and assumption entered into
by a Lender and an Eligible Assignee (with the consent of any party whose
consent is required by Section 10.5), and accepted by Administrative Agent, in
substantially the form of Exhibit E or any other form approved by Administrative
Agent.

                                        2

<PAGE>

     "Available Borrowing Base" means, at any time of determination, the
remainder of (a) the lesser of the Borrowing Base or the Aggregate Commitments,
minus (b) the Facility Usage.

     "Base Rate" means, for any period, a fluctuating interest rate per annum as
shall be in effect from time to time, which rate per annum shall be equal at all
times to the highest of the following:

     (a) the rate of interest announced publicly by Administrative Agent in New
York, New York, from time to time, as Administrative Agent's base rate;

     (b) the sum (adjusted to the nearest 0.25% or, if there is no nearest
0.25%, to the next higher 0.25%) of (i) 0.5% per annum, (ii) the rate per annum
obtained by dividing (A) the latest three week moving average of secondary
market morning offering rates in the United States for three month certificates
of deposit of major United States money market banks, such three week moving
average being determined weekly on each Monday (or, if any such day is not a
Business Day, on the next succeeding Business Day) for the three week period
ending on the previous Friday by Administrative Agent on the basis of such rates
reported by certificate of deposit dealers to and published by the Federal
Reserve Bank of New York or, if such publication shall be suspended or
terminated, on the basis of quotations for such rates received by Administrative
Agent from three New York certificate of deposit dealers of recognized standing
selected by Administrative Agent, by (B) a percentage equal to 100% minus the
average of the daily percentages specified during such three week period by the
Federal Reserve Board for determining the maximum reserve requirement (including
any emergency, supplemental or other marginal reserve requirement) for
Administrative Agent in respect of liabilities consisting of or including (among
other liabilities) three month U.S. dollar nonpersonal time deposits in the
United States and (iii) the average during such three week period of the maximum
annual assessment rates estimated by Administrative Agent for determining the
then current annual assessment payable by Administrative Agent to the Federal
Deposit Insurance Corporation (or any successor) for insuring Dollar deposits in
the United States; and

     (c) 0.5% per annum plus the Federal Funds Rate.

     "Base Rate Loan" means a Loan that bears interest at the Adjusted Base
Rate.

     "Base Rate Margin" means, on any date, with respect to each Base Rate Loan,
the rate per annum set forth below based on the Applicable Utilization Level on
such date:

<TABLE>
<CAPTION>
Applicable Utilization Level   Base Rate Margin
----------------------------   ----------------
<S>                            <C>
          Level I                    0.00%

          Level II                   0.25%

          Level III                  0.50%

          Level IV                   0.75%
</TABLE>

                                        3

<PAGE>

Changes in the applicable Base Rate Margin will occur automatically without
prior notice as changes in the Applicable Utilization Level occur.
Administrative Agent will give notice promptly to Borrower and the Lenders of
changes in the Base Rate Margin.

     "Borrower" means AREP Oil & Gas LLC, a Delaware limited liability company.

     "Borrowing" means a borrowing of new Loans of a single Type (and, in the
case of Eurodollar Loans, with the same Interest Period) pursuant to Section 2.2
or a Continuation or Conversion of existing Loans into a single Type (and, in
the case of Eurodollar Loans, with the same Interest Period) pursuant to Section
2.3.

     "Borrowing Base" means, at the particular time in question, either the
amount provided for in Section 2.8 or the amount determined in accordance with
the provisions of Section 2.9; provided, however, that in no event shall the
Borrowing Base ever exceed the Maximum Senior Credit Amount.

     "Borrowing Base Deficiency" has the meaning given to such term in Section
2.7(b).

     "Borrowing Base Period" means (a) the time period from the date of this
Agreement until the first Scheduled Redetermination; and (b) thereafter each
period from and including the date of a Scheduled Redetermination until, but not
including, the date of the next Scheduled Redetermination.

     "Borrowing Notice" means a written or telephonic request, or a written
confirmation, made by Borrower which meets the requirements of Section 2.2.

     "Business Day" means a day, other than a Saturday or Sunday, on which
commercial banks are open for business with the public in New York, New York.
Any Business Day in any way relating to Eurodollar Loans (such as the day on
which an Interest Period begins or ends) must also be a day on which, in the
judgment of Administrative Agent, significant transactions in dollars are
carried out in the interbank eurocurrency market.

     "Capital Lease" means a lease with respect to which the lessee is required
concurrently to recognize the acquisition of an asset and the incurrence of a
liability in accordance with GAAP.

     "Capital Lease Obligation" means, with respect to any Person and a Capital
Lease, the amount of the obligation of such Person as the lessee under such
Capital Lease which should, in accordance with GAAP, appear as a liability on
the balance sheet of such Person.

     "Cash Equivalents" means Investments in:

     (a) marketable obligations, maturing within twelve months after acquisition
thereof, issued or unconditionally guaranteed by the United States of America or
an instrumentality or agency thereof and entitled to the full faith and credit
of the United States of America;

     (b) demand deposits, and time deposits (including certificates of deposit)
maturing within twelve months from the date of deposit thereof, with any office
of any Lender or with a domestic office of any national or state bank or trust
company which is organized under the

                                        4

<PAGE>

Laws of the United States of America or any state therein, which has capital,
surplus and undivided profits of at least $500,000,000, and whose long term
certificates of deposit are rated at least Aa3 by Moody's or AA- by S & P;

     (c) repurchase obligations with a term of not more than seven days for
underlying securities of the types described in subsection (a) above entered
into with any commercial bank meeting the specifications of subsection (b)
above;

     (d) open market commercial paper, maturing within 270 days after
acquisition thereof, which are rated at least P-1 by Moody's or A-1 by S & P;

     (e) money market or other mutual funds substantially all of whose assets
comprise securities of the types described in subsections (a) through (d) above;
and

     (f) auction rated reset securities rated at least A by S&P or A by Moody's
(notwithstanding their classification under GAAP).

     "Change in Law" means the occurrence, after the date of this Agreement, of
any of the following: (a) the adoption or taking effect of any Law, (b) any
change in any Law, or in the administration, interpretation or application
thereof by any Governmental Authority or (c) the making or issuance of any
request, guideline or directive (whether or not having the force of Law) by any
Governmental Authority.

     "Change of Control" means the occurrence of any event or series of events
pursuant to which:

     (a) at any time, any Person or two or more Persons acting as a group
(within the meaning of Rule 13d-3 of the Securities and Exchange Commission
under the Securities Exchange Act of 1934, as amended) shall own, directly or
indirectly, more of the economic interests and voting power of the Equity of
Borrower than the Icahn Group, or

     (b) prior to the Initial Equity Offering, the Icahn Group shall cease to
own for any reason, directly or indirectly, greater than 30% of the outstanding
voting securities of Borrower, measured by voting power (including both common
Equity and any preferred Equity or other Equity entitling the holders thereof to
vote with the holders of common Equity in elections for directors of Borrower).
As used herein, "Icahn Group" means (1) Carl C. Icahn, any spouse and any child,
stepchild, sibling or descendant of Carl C. Icahn, (2) any estate of Carl C.
Icahn or any Person under clause (1), (3) any Person who receives a beneficial
interest in any estate under clause (2) to the extent of such interest, (4) any
executor, personal administrator or trustee who holds such beneficial interest
for the benefit of, or as a fiduciary for, any person under clauses (1), (2), or
(3) to the extent of such interest and (5) any corporation, partnership, limited
liability company, trust, or similar entity, directly or indirectly owned or
Controlled by Carl C. Icahn or any other Person or Persons identified in clauses
(1), (2) or (3).

     "Closing Date" means the date on which all of the conditions precedent set
forth in Section 4.1 and Section 4.2 shall have been satisfied or waived.

                                        5

<PAGE>

     "Collateral" means (a) all property of any kind which is subject to a Lien
in favor of Lenders (or in favor of Administrative Agent for the benefit of
Lenders) or which, under the terms of any Security Document, is purported to be
subject to such a Lien, and (b) all NEGO Collateral.

     "Commitment" means, for each Lender, the obligation of such Lender to make
Loans to, and participate in Letters of Credit issued upon the application of,
Borrower in an aggregate amount not exceeding the amount set forth on the
Lenders Schedule or as set forth in any Assignment and Assumption relating to
any assignment that has become effective pursuant to Section 10.5, as such
amount may be modified from time to time pursuant to the terms hereof.

     "Commitment Fee Rate" means, on any date, the rate per annum set forth
below based on the Applicable Utilization Level on such date:

<TABLE>
<CAPTION>
Applicable Utilization Level   Commitment Fee Rate
----------------------------   -------------------
<S>                            <C>
          Level I                     0.375%

          Level II                    0.375%

          Level III                   0.50%

          Level IV                    0.50%
</TABLE>

Changes in the applicable Commitment Fee Rate will occur automatically without
prior notice as changes in the Applicable Utilization Level occur.
Administrative Agent will give notice promptly to Borrower and the Lenders of
changes in the Commitment Fee Rate.

     "Commitment Period" means the period from and including the Closing Date
until the Maturity Date (or, if earlier, the day on which the obligations of
Lenders to make Loans hereunder or the obligations of LC Issuer to issue Letters
of Credit hereunder have been terminated or the Notes first become due and
payable in full).

     "Consolidated" refers to the consolidation of any Person, in accordance
with GAAP, with its properly consolidated subsidiaries. References herein to a
Person's Consolidated financial statements, financial position, financial
condition, liabilities, etc. refer to the consolidated financial statements,
financial position, financial condition, liabilities, etc. of such Person and
its properly consolidated subsidiaries.

     "Consolidated Current Assets" means, for any period, the aggregate amount
of all assets of Borrower and its Consolidated Subsidiaries which would be
properly classified as current assets in accordance with GAAP plus any Available
Borrowing Base, but excluding any unrealized assets resulting from compliance
with the Financial Accounting Standards Board's Statement 133 concerning
mark-to-market requirements on hedging transactions.

                                        6

<PAGE>

     "Consolidated Current Liabilities" means, for any period, the aggregate
amount of all liabilities of Borrower and its Consolidated Subsidiaries which
would be properly classified as current liabilities in accordance with GAAP, but
excluding (i) any unrealized liabilities resulting from compliance with the
Financial Accounting Standards Board's Statement 133 concerning mark-to-market
requirements on hedging transactions, and (ii) any current liabilities relating
to Intercompany Obligations.

     "Consolidated EBITDA" means for any period of four consecutive Fiscal
Quarters, the Consolidated Net Income of Borrower for such period; plus each of
the following (without duplication) determined for Borrower and its Consolidated
Subsidiaries on a Consolidated basis for such period: (a) any provision for (or
less any benefit from) income or franchise taxes included in determining
Consolidated Net Income; (b) any interest expense deducted in determining
Consolidated Net Income; and (c) any depreciation, depletion or amortization
expense deducted in determining Consolidated Net Income and any other non-cash
charge, expense or loss deducted in determining Consolidated Net Income; and
minus each of the following (without duplication) determined for Borrower and
its Consolidated Subsidiaries on a Consolidated basis for such period, to the
extent included in determining such Consolidated Net Income for such period: (i)
any extraordinary income or gains; (ii) any other non-cash income or gain, and
(iii) the cumulative effect of any change in accounting principles, provided
however, that in determining Consolidated Net Income for the purposes of this
definition for any period of four Fiscal Quarters in which Borrower or any of
its Consolidated Subsidiaries acquires additional Subsidiaries (whether by
purchase, merger or otherwise) or acquires or disposes of producing Oil and Gas
Properties, (1) the Consolidated Net Income of such acquired Subsidiaries shall
be included in such calculation on a pro forma basis as if they had been owned
by Borrower and its Consolidated Subsidiaries throughout such four Fiscal
Quarter period, (2) the revenues attributable to the oil and gas production from
such acquired Oil and Gas Properties during such four Fiscal Quarter period,
less the direct operating expenses and severance and ad valorem taxes incurred
with respect to such properties during such four Fiscal Quarter period, shall be
included in such calculation on a pro forma basis as if they had been owned by
Borrower and its Consolidated Subsidiaries throughout such four Fiscal Quarter
period, and (3) the revenues attributable to the oil and gas production from
producing Oil and Gas Properties disposed of during such four Fiscal Quarter
period, less the direct operating expenses and severance and ad valorem taxes
incurred with respect to such properties during such four Fiscal Quarter period,
shall be deducted in such calculation on a pro forma basis as if they had not
been owned by Borrower and its Consolidated Subsidiaries throughout such four
Fiscal Quarter period.

     "Consolidated Net Income" means, for any period, the net income (or loss)
of Borrower and its Consolidated Subsidiaries for such period determined in
accordance with GAAP, provided that the following shall be excluded in
calculating Consolidated Net Income and Consolidated EBITDA: (i) any gain or
loss from the sale of assets other than in the ordinary course of business, (ii)
any non-cash income, gains, losses or charges resulting from the requirements of
SFAS 133 or 143, and (iii) any non-cash interest expense in respect of
Intercompany Obligations owing to Debt Holdco.

     "Consolidated Tangible Net Worth" means, at any time, the sum of (i) the
total assets of Borrower and its Consolidated Subsidiaries at such time
determined in accordance with GAAP, minus (ii) the total liabilities of Borrower
and its Consolidated Subsidiaries at such time

                                        7

<PAGE>

determined in accordance with GAAP, minus (iii) all intangible assets properly
classified as such in accordance with GAAP, including, but without limitation,
patents, patent rights, trademarks, trade names, franchises, copyrights,
licenses, permits and goodwill (whether representing the excess of cost of
tangible assets acquired over book value or otherwise), plus (iv) Indebtedness
owed by any Credit Party to Debt Holdco, plus (v) any net liabilities of any
Credit Party in respect of Hedging Contracts, and minus (vi) any net assets of
any Credit Party in respect of Hedging Contracts.

     "Consolidated Total Debt" means, at any time, the aggregate of all
Indebtedness (including the current portion thereof) of Borrower and its
Consolidated Subsidiaries at such time determined in accordance with GAAP, but
excluding Indebtedness in respect of Hedging Contracts, Indebtedness in respect
of Letters of Credit not otherwise supporting Indebtedness, and Intercompany
Obligations owing to Debt Holdco.

     "Continuation" shall refer to the continuation pursuant to Section 2.3
hereof of a Eurodollar Loan as a Eurodollar Loan from one Interest Period to the
next Interest Period.

     "Continuation/Conversion Notice" means a written or telephonic request, or
a written confirmation, made by Borrower which meets the requirements of Section
2.3.

     "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.

     "Conversion" shall refer to a conversion pursuant to Section 2.3 or Article
III of one Type of Loan into another Type of Loan.

     "Credit Party" means any of Borrower, each Subsidiary of Borrower, and each
Guarantor.

     "Debt Holdco" means a newly formed subsidiary of AREH that is formed to
carry out the activities contemplated herein for "Debt Holdco" and that has no
other businesses or liabilities.

     "Default" means any Event of Default and any default, event or condition
which would, with the giving of any requisite notices and the passage of any
requisite periods of time, constitute an Event of Default.

     "Default Rate" means, at the time in question (a) with respect to any Base
Rate Loan or other Obligation other than a Eurodollar Loan, the rate per annum
equal to two percent (2%) above the Adjusted Base Rate then in effect for such
Loan and (b) with respect to any Eurodollar Loan, the rate per annum equal to
two percent (2%) above the Adjusted Eurodollar Rate then in effect for such
Loan, provided in each case that no Default Rate charged by any Person shall
ever exceed the Highest Lawful Rate.

     "Determination Date" has the meaning given to such term in Section 2.9.

     "Disclosure Schedule" means Schedule 1 hereto.

                                        8

<PAGE>

     "Distribution" means (a) any dividend or other distribution made by a
Credit Party on or in respect of any Equity in such Credit Party or any other
Credit Party, (b) any payment made by a Credit Party to purchase, redeem,
acquire or retire any Equity in such Credit Party or any other Credit Party, or
(c) any payment by a Credit Party on account of Indebtedness owed to Debt Holdco
or IPO Co or any other Person other than a Credit Party that is an Affiliate of
Borrower.

     "Domestic Lending Office" means, with respect to any Lender, the office of
such Lender specified as its "Domestic Lending Office" on the Lenders Schedule,
or such other office as such Lender may from time to time specify to Borrower
and Administrative Agent; with respect to LC Issuer, the office, branch, or
agency through which it issues Letters of Credit; and, with respect to
Administrative Agent, the office, branch, or agency through which it administers
this Agreement.

     "Eligible Assignee" means (a) a Lender, (b) an Affiliate of a Lender, (c)
an Approved Fund, and (d) any other Person (other than a natural person)
approved by (i) Administrative Agent, and LC Issuer and (ii) unless an Event of
Default has occurred and is continuing, Borrower (each such approval not to be
unreasonably withheld or delayed); provided that notwithstanding the foregoing,
"Eligible Assignee" shall not include Borrower or any of Borrower's Affiliates
or Subsidiaries.

     "Engineered Oil and Gas Property" means any Oil and Gas Property listed in
the Initial Engineering Report or any subsequent Engineering Report.

     "Engineering Report" means the Initial Engineering Report and each
engineering report delivered pursuant to Section 6.2. To the extent that two or
more engineering firms prepare reports as of the same date for portions of the
properties required to be reported on, such reports will collectively constitute
a single "Engineering Report" for the purposes hereof.

     "Environmental Laws" means any and all Laws relating to the protection
and/or preservation of the environment or to emissions, discharges, releases or
threatened releases of pollutants, contaminants, chemicals, or industrial, toxic
or hazardous substances or wastes into the environment including ambient air,
surface water, ground water, or land, or otherwise relating to the manufacture,
processing, distribution, use, treatment, storage, disposal, transport, or
handling of pollutants, contaminants, chemicals, or industrial, toxic or
hazardous substances or wastes, but not including any licenses or permits issued
pursuant to any Environmental Laws.

     "Equity" means shares of capital stock or a partnership, profits, capital,
member or other equity interest of any Person and options, warrants or any other
rights to otherwise acquire the capital stock or a partnership, profits,
capital, member or other equity interest of any Person.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended from time to time, and any successor statutes or statute, together with
all rules and regulations promulgated with respect thereto.

     "ERISA Affiliate" means each Credit Party and all members of a controlled
group of corporations and all trades or businesses (whether or not incorporated)
under common control that, together with such Credit Party, are treated as a
single employer under Section 414 of the Internal Revenue Code.

                                        9

<PAGE>

     "ERISA Plan" means any employee pension benefit plan subject to Title IV of
ERISA maintained by any ERISA Affiliate with respect to which any Credit Party
has a fixed or contingent liability.

     "Eurodollar Lending Office" means, with respect to any Lender, the office
of such Lender specified as its "Eurodollar Lending Office" on the Lenders
Schedule (or, if no such office is specified, its Domestic Lending Office), or
such other office of such Lender as such Lender may from time to time specify to
Borrower and Administrative Agent.

     "Eurodollar Loan" means a Loan that bears interest at the Adjusted
Eurodollar Rate.

     "Eurodollar Margin" means, on any date, with respect to each Eurodollar
Loan, the rate per annum set forth below based on the Applicable Utilization
Level on such date:

<TABLE>
<CAPTION>
Applicable Utilization Level   Eurodollar Margin
----------------------------   -----------------
<S>                            <C>
          Level I                     1.00%

          Level II                    1.25%

          Level III                   1.50%

          Level IV                    1.75%
</TABLE>

Changes in the applicable Eurodollar Margin will occur automatically without
prior notice as changes in the Applicable Utilization Level occur.
Administrative Agent will give notice promptly to Borrower and the Lenders of
changes in the Eurodollar Margin.

     "Eurodollar Rate" means, with respect to any Interest Period for any
Eurodollar Loan within a Borrowing and with respect to the related Interest
Period therefor, the rate of interest determined by the Administrative Agent to
be the rate per annum at which deposits in Dollars are offered by the principal
office of Administrative Agent in London to major banks in the London interbank
market at 11:00 a.m. (London time) two Business Days before the first day of
such Interest Period in an amount substantially equal to the Eurodollar Loan of
Administrative Agent for a period equal to such Interest Period.

     "Event of Default" has the meaning given to such term in Section 8.1.

     "Excluded Taxes" means, with respect to Administrative Agent, any Lender,
LC Issuer or any other recipient of any payment to be made by or on account of
any obligation of Borrower hereunder, (a) taxes imposed on or measured by its
overall net income (however denominated), and franchise taxes imposed on it (in
lieu of net income taxes), by the jurisdiction (or any political subdivision
thereof) 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 Borrower is located and (c) in the case of a Foreign

                                       10

<PAGE>

Lender (other than an assignee pursuant to a request by the Borrower under
Section 3.7(b)), any withholding tax that would be imposed on amounts payable to
such Foreign Lender under the Laws in effect at the time such Foreign Lender
becomes a party hereto (or designates a new lending office) or is attributable
to such Foreign Lender's failure or inability (other than as a result of a
Change in Law) to comply with Section 3.5(e), except to the extent that such
Foreign Lender (or its assignor, if any) was entitled immediately prior to the
designation of a new lending office (or assignment), to receive additional
amounts from the Borrower with respect to such withholding tax pursuant to
Section 3.5(a).

     "Facility Usage" means, at the time in question, the aggregate principal
amount of outstanding Loans and existing LC Obligations at such time.

     "Federal Funds Rate" means, for any day, the rate per annum (rounded
upwards, if necessary, to the nearest 1/100th of one percent) equal to the
weighted average of the rates on overnight Federal funds transactions with
members of the Federal Reserve System arranged by Federal funds brokers on such
day, as published by the Federal Reserve Bank of Bank of New York on the
Business Day next succeeding such day, provided that (a) if the day for which
such rate is to be determined is not a Business Day, the Federal Funds Rate for
such day shall be such rate on such transactions on the next preceding Business
Day as so published on the next succeeding Business Day, and (b) if such rate is
not so published for any day, the Federal Funds Rate for such day shall be the
average rate quoted to Administrative Agent on such day on such transactions as
determined by Administrative Agent.

     "Fiscal Quarter" means a three-month period ending on March 31, June 30,
September 30 or December 31 of any year.

     "Fiscal Year" means a twelve-month period ending on December 31 of any
year.

     "Foreign Lender" means any Lender that is organized under the laws of a
jurisdiction other than that in which Borrower is resident for tax purposes. 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.

     "Fund" means any Person (other than a natural person) that is (or will be)
engaged in making, purchasing, holding or otherwise investing in commercial
loans and similar extensions of credit in the ordinary course of its business.

     "GAAP" means those generally accepted accounting principles and practices
which are recognized as such by the Financial Accounting Standards Board (or any
generally recognized successor) and which, in the case of Credit Parties and
their Consolidated Subsidiaries, are applied for all periods after the date
hereof in a manner consistent with the manner in which such principles and
practices were applied to the Initial Financial Statements. If any change in any
accounting principle or practice is required by the Financial Accounting
Standards Board (or any such successor) in order for such principle or practice
to continue as a generally accepted accounting principle or practice, all
reports and financial statements required hereunder with respect to any Credit
Party or with respect to any Credit Party and its Consolidated Subsidiaries may
be prepared in accordance with such change, but all calculations and
determinations to be

                                       11

<PAGE>

made hereunder may be made in accordance with such change only after notice of
such change is given to the Administrative Agent, and Majority Lenders and
Administrative Agent agree to such change insofar as it affects the accounting
of such Credit Party and its Consolidated Subsidiaries.

     "Governmental Authority" means the government of the United States of
America or any other nation, or of 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 (including any supra-national bodies such as the European Union or
the European Central Bank).

     "Guarantor" means (a) any Person who has guaranteed some or all of the
Obligations pursuant to a Guaranty listed on the Security Schedule, (b) any
other Person who has guaranteed some or all of the Obligations and who has been
accepted by Administrative Agent as a Guarantor, or (c) any Subsidiary of
Borrower, and, on or after the consummation of the Initial Equity Offering, IPO
Co, in each case, which now or hereafter executes and delivers a Guaranty to
Administrative Agent pursuant to Section 6.15.

     "Guaranty" means the Guaranty provided on the Closing Date by National
Onshore, National Offshore, and the other subsidiaries of Borrower excluding the
NEG Subsidiaries. Guaranty also means any other guaranty agreement in
substantially the same form that is hereafter accepted by Administrative Agent
as a Guaranty hereunder.

     "Hazardous Materials" means any substances regulated under any
Environmental Law, including, but not limited to, (a) any oil, natural gas,
naturally occurring radioactive materials, oil field fluids and wastes, salt
water, produced water and petroleum and (b) any "hazardous substances," "toxic
substances," "hazardous waste," "extremely hazardous waste," "extremely
hazardous substance," or words of similar import under any Environmental Laws.

     "Hedging Contract" means (a) any agreement providing for options, swaps,
floors, caps, collars, forward sales or forward purchases involving interest
rates, commodities or commodity prices, equities, currencies, bonds, or indexes
based on any of the foregoing, (b) any option, futures or forward contract
traded on an exchange, and (c) any other derivative agreement or other similar
agreement or arrangement.

     "Highest Lawful Rate" means, with respect to each Lender Party to whom
Obligations are owed, the maximum nonusurious rate of interest that such Lender
Party is permitted under applicable Law to contract for, take, charge, or
receive with respect to such Obligations. All determinations herein of the
Highest Lawful Rate, or of any interest rate determined by reference to the
Highest Lawful Rate, shall be made separately for each Lender Party as
appropriate to assure that the Loan Documents are not construed to obligate any
Person to pay interest to any Lender Party at a rate in excess of the Highest
Lawful Rate applicable to such Lender Party.

     "Increase Effective Date" has the meaning given to such term in Section
2.17(b).

     "Indebtedness" of any Person means, without duplication, Liabilities in any
of the following categories (provided, however, that the "Indebtedness" of any
Person shall not include Liabilities that were incurred by such Person on
ordinary trade terms to vendors, suppliers, or

                                       12

<PAGE>

other Persons providing goods and services for use by such Person in the
ordinary course of its business or any Liability to pay dividends or
distributions that have been declared in compliance herewith):

     (a) Liabilities for borrowed money;

     (b) Liabilities constituting an obligation to pay the deferred purchase
price of property or services, other than purchase price adjustments to be made
post-closing under agreements for the sale or purchase of properties in
compliance with this Agreement;

     (c) Liabilities evidenced by a bond, debenture, note or similar instrument;

     (d) Liabilities which (i) would under GAAP be shown on such Person's
balance sheet as a liability and (ii) are payable more than one year from the
date of creation or incurrence thereof (other than reserves for taxes and
reserves for contingent obligations);

     (e) Liabilities arising under Hedging Contracts (on a net basis to the
extent netting is provided for in the applicable Hedging Contract);

     (f) Liabilities constituting principal under Capital Leases;

     (g) Liabilities arising under conditional sales or other title retention
agreements;

     (h) Liabilities owing under direct or indirect guaranties of Indebtedness
of any other Person or otherwise constituting obligations to purchase or acquire
or to otherwise protect or insure a creditor against loss in respect of
Indebtedness of any other Person (such as obligations under working capital
maintenance agreements, agreements to keep-well, or agreements to purchase
Indebtedness, assets, goods, securities or services), but excluding endorsements
in the ordinary course of business of negotiable instruments in the course of
collection;

     (i) Liabilities (for example, repurchase agreements, mandatorily redeemable
preferred stock and sale/leaseback agreements) consisting of an obligation to
purchase or redeem securities or other property, if such Liabilities arise out
of or in connection with the sale or issuance of the same or similar securities
or property;

     (j) Liabilities with respect to letters of credit or applications or
reimbursement agreements therefor;

     (k) Liabilities with respect to banker's acceptances;

     (l) Liabilities with respect to payments received in consideration of oil,
gas, or other minerals yet to be acquired or produced at the time of payment
(including obligations under "take-or-pay" contracts to deliver gas in return
for payments already received and the undischarged balance of any production
payment created by such Person or for the creation of which such Person directly
or indirectly received payment); or

     (m) Liabilities with respect to other obligations to deliver goods or
services in consideration of advance payments therefor.

                                       13

<PAGE>

     "Indemnified Taxes" means Taxes other than Excluded Taxes.

     "Initial Borrowing Base" has the meaning given to such term in Section 2.8.

     "Initial Engineering Report" means the three following engineering reports
concerning oil and gas properties of Credit Parties: (a) the report prepared by
Netherland, Sewell & Associates as of July 1, 2005, (b) the report prepared by
DeGolyer & MacNaughton as of June 30, 2005, and (c) the report concerning the
Minden Field properties prepared by Borrower's internal engineering staff as of
August 31, 2005.

     "Initial Equity Offering" means a series of transactions resulting in:

          (a) NEGH and NEGO becoming wholly owned Subsidiaries, directly or
     indirectly, of Borrower,

          (b) IPO Co offering its Equity to the public, and

          (c) the payment or termination, or reassignment to Borrower, or any
     combination of the foregoing, of all Intercompany Obligations owing to Debt
     Holdco by Borrower or any of Borrower's Subsidiaries,

provided that all of the foregoing must occur without any payment or asset
transfer of any kind by Borrower or any of its Subsidiaries other than
Distributions allowed under Section 7.6 and the following permitted payments and
asset transfers:

          (i) the distribution of Borrower's shares in NEGI to Debt Holdco
     (which may include immediate intermediate transfers through AREH or a
     Subsidiary of AREH) within one week prior to the merger of NEGI into IPO
     Co, with such shares remaining subject to the Liens of Administrative Agent
     under the Loan Documents until NEGH and its Subsidiaries become wholly
     owned Subsidiaries of Borrower held otherwise than through NEGI,

          (ii) Borrower's or Debt Holdco's surrender of its shares in NEGI as
     part of the merger of NEGI into IPO Co, provided that (A) NEGH and its
     Subsidiaries then become, or previously have become, wholly owned
     Subsidiaries of Borrower held otherwise than through NEGI and (B) after
     giving effect to such transfer of ownership of NEGH and its Subsidiaries
     pursuant to the preceding clause (A), no Oil & Gas Properties, cash or
     other material assets belong to NEGI, directly or indirectly (except for
     the assets owned directly by NEGI on September 30, 2005, including cash and
     Cash Equivalents of approximately $4,500,000, other miscellaneous assets
     thereafter acquired by NEGI for use in its management business, receivables
     owing at the time of the transfer of ownership of NEGH and its Subsidiaries
     under various management agreements with NEGO, National Onshore and
     National Offshore, and tax assets), provided that NEGI may continue to hold
     legal title to minor Oil and Gas Properties for the benefit of NEGO if
     transfer of such legal title to NEGO cannot reasonably be made prior to the
     time of such merger,

                                       14

<PAGE>

          (iii) the issuance by Borrower to IPO Co of Equity in Borrower,

          (iv) any Distribution by any Credit Party to AREH or any of AREH's
     Affiliates of:

               (A) the proceeds of the Initial Equity Offering, provided that
          the repayment of Loans required under Section 2.7(c) is made
          concurrently therewith, and

               (B) if the issuance or borrowing of the Allowed Second
          Lien/Unsecured Indebtedness occurs substantially concurrently with the
          Initial Equity Offering, the proceeds of the Allowed Second
          Lien/Unsecured Indebtedness, provided that the condition set forth in
          Section 4.1(r) is satisfied.

          In connection with any Distribution pursuant to this clause (iv), NEGI
          may, in a transaction with Borrower or Debt Holdco, use the proceeds
          described in the foregoing clauses (A) and (B) to pay its 10 3/4%
          Senior Notes due November 1, 2006 or may retire such Senior Notes by
          exchanging for such Senior Notes NEGI's right to receive some or all
          of the "NEGI Priority Amount" (as defined in the limited liability
          company operating agreement of NEGH), but only to the extent that the
          NEGI Priority Amount so exchanged is concurrently (or substantially
          concurrently) paid using the proceeds described in the foregoing
          clauses (A) and (B), terminated, or reassigned to Borrower, or any
          combination of the foregoing.

     "Initial Financial Statements" means (a) the audited annual Consolidated
financial statements of each of NEGI, National Onshore and National Offshore as
of and for the Fiscal Year ended December 31, 2004, (b) the consolidating
compilation of such audited annual Consolidated financial statements for the
Fiscal Year ended December 31, 2004 and (c) the unaudited quarterly
consolidating financial statements of Borrower as of September 30, 2005.

     "Insurance Schedule" means Schedule 3 attached hereto.

     "Intercompany Obligations" means, without duplication:

     (a) present or future Indebtedness owing by National Onshore or National
Offshore to Borrower or presently existing Indebtedness owing by National
Onshore or National Offshore to a Subsidiary of Borrower that is a Guarantor,
provided in each case that such Indebtedness is evidenced by a promissory note
in form acceptable to Administrative Agent that has been pledged and delivered
to Administrative Agent under a Security Document acceptable to Administrative
Agent and further provided that such presently existing Indebtedness owing to a
Subsidiary of Borrower that is a Guarantor shall be transferred by such
Subsidiary to Borrower (by merger, assignment, or otherwise) as soon as
reasonably practicable after the Closing Date,

     (b) Indebtedness owing by NEGI to Borrower under NEGI's 10 3/4% Senior
Notes due November 1, 2006,

                                       15

<PAGE>

     (c) Indebtedness described in clauses (a) and (b) of this definition that
is now or hereafter assigned (in whole or in part) by Borrower to Debt Holdco,
provided that Borrower retains all rights to receive payments of interest on
such Indebtedness and that Debt Holdco first becomes a Guarantor and
acknowledges that such Indebtedness is subject to Administrative Agent's Lien,
and further provided that all such Indebtedness is paid in full with the
proceeds of the Initial Equity Offering or the Allowed Second Lien/Unsecured
Indebtedness or assigned to Borrower by Debt Holdco promptly after the
conclusion of the Initial Equity Offering without further charge,

     (d) the obligation of NEGH to pay to NEGI the "NEGI Priority Amount" (as
defined in the limited liability company operating agreement of NEGH), which
obligation may be transferred to Borrower or may be transferred as contemplated
in the final sentence of the definition of "Initial Equity Offering".

     (e) Indebtedness owing by NEGO to Borrower under the Restated NEGO Credit
Facility; provided that no additional extensions of credit may be made by
Borrower to NEGO under the Restated NEGO Credit Facility during the existence of
a Default under the Restated NEGO Credit Facility, and

     (f) other Indebtedness owing by any Subsidiary of Borrower to any other
Credit Party, provided that such Indebtedness is (i) evidenced by a promissory
note pledged and delivered to Administrative Agent under a Security Document
acceptable to Administrative Agent, and (ii) subordinated to the Obligations on
terms set out in a Guaranty or otherwise acceptable to Administrative Agent.

     "Intercreditor Agreement" means any intercreditor and lien subordination
agreement entered into in connection with Second Lien Notes as contemplated
under the heading "Subordination Agreement" in Part II of Schedule 4.

     "Interest Payment Date" means (a) with respect to each Base Rate Loan, the
last Business Day of each March, June, September and December, and (b) with
respect to each Eurodollar Loan, the last day of the Interest Period that is
applicable thereto and, if such Interest Period is six months in length, each
date specified by Administrative Agent which is approximately three months after
such Interest Period begins; provided that the last day of each calendar month
shall also be an Interest Payment Date for each such Loan so long as any Event
of Default exists under Section 8.1 (a) or (b).

     "Interest Period" means, with respect to each Eurodollar Loan, the period
specified in the Borrowing Notice or Continuation/Conversion Notice applicable
to such Eurodollar Loan, beginning on and including the date specified in such
Borrowing Notice or Continuation/ Conversion Notice (which must be a Business
Day), and ending one, two, three or six months thereafter, as Borrower may elect
in such notice; provided that: (a) any Interest Period which would otherwise end
on a day which is not a Business Day shall be extended to the next succeeding
Business Day unless such Business Day falls in another calendar month, in which
case such Interest Period shall end on the next preceding Business Day; (b) any
Interest Period which begins on the last Business Day in a calendar month (or on
a day for which there is no numerically corresponding day in the calendar month
at the end of such Interest Period) shall end

                                       16

<PAGE>

on the last Business Day in a calendar month; and (c) notwithstanding the
foregoing, any Interest Period which would otherwise end after the Maturity Date
shall end on the last day of the Commitment Period (or, if the Maturity Date is
not a Business Day, on the next preceding Business Day).

     "Internal Control Event" means a material weakness in, or fraud that
involves management or other employees who have significant role in, any Credit
Party's internal controls over financial reporting, in each case as described in
the Securities Laws.

     "Internal Revenue Code" means the United States Internal Revenue Code of
1986, as amended from time to time and any successor statute or statutes,
together with all rules and regulations promulgated with respect thereto.

     "Investment" means any investment, made directly or indirectly, in any
Person, whether by purchase, acquisition of Equity, Indebtedness or other
obligations or securities or by extension of credit, loan, advance, capital
contribution or otherwise and whether made in cash, by the transfer of property,
or by any other means. "Investments" does not include purchases of working
interests, royalty interests, overriding royalty interests and mineral estates.

     "IPO Co" means a corporation that will issue its Equity to the public in
the Initial Equity Offering and thereafter serve as the partial owner and sole
managing member of Borrower.

     "Law" means any statute, law, regulation, ordinance, rule, treaty,
judgment, order, decree, permit, concession, franchise, license, agreement or
other governmental restriction of the United States or any state or political
subdivision thereof or of any foreign country or any department, province or
other political subdivision thereof. Any reference to a Law includes any
amendment or modification to such Law, and all regulations, rulings, and other
Laws promulgated under such Law.

     "LC Application" means any application for a Letter of Credit hereafter
made by Borrower to LC Issuer.

     "LC Collateral" has the meaning given to such term in Section 2.15(a).

     "LC Conditions" has the meaning given to such term in Section 2.10.

     "LC Issuer" means Citicorp USA, Inc. (or any Affiliate of Citicorp USA,
Inc. that also executes a signature page hereto as an "LC Issuer") in its
capacity as the issuer of Letters of Credit hereunder, and its successors in
such capacity. Administrative Agent may, with the consent of the Lender in
question, appoint any Lender hereunder as an LC Issuer in place of or in
addition to Citicorp USA, Inc.

     "LC Obligations" means, at the time in question, the sum of all Matured LC
Obligations plus the maximum amounts which LC Issuer might then or thereafter be
called upon to advance under all Letters of Credit then outstanding.

     "LC Sublimit" means $25,000,000.

                                       17

<PAGE>

     "Lender Hedging Obligations" means all obligations arising from time to
time under Hedging Contracts entered into from time to time between Borrower or
NEGO and a counterparty that is a Lender or an Affiliate of a Lender; provided
that (a) if such counterparty ceases to be a Lender hereunder or an Affiliate of
a Lender hereunder, Lender Hedging Obligations shall only include such
obligations to the extent arising from transactions entered prior to the time
such counterparty ceases to be a Lender hereunder or an Affiliate of a Lender
hereunder, and (b) for any of the forgoing to be included within "Lender Hedging
Obligations" hereunder, the applicable counterparty (other than the
Administrative Agent or any Affiliate thereof) must have provided Administrative
Agent written notice of the existence thereof promptly after such transaction is
entered into and such transaction must not otherwise be prohibited under this
Agreement. The Lender Hedging Obligations also include any guaranties by any
Credit Party of any of the obligations mentioned previously in this paragraph.

     "Lender Parties" means Administrative Agent, LC Issuer, and all Lenders.

     "Lenders" means each signatory hereto (other than Borrower and any Credit
Party that is a party hereto), including Citicorp USA, Inc. in its capacity as a
Lender hereunder rather than as Administrative Agent or LC Issuer, and the
successors of each such party as Lender hereunder pursuant to Section 10.5.

     "Lenders Schedule" means Schedule 5 hereto.

     "Letter of Credit" means any letter of credit issued by LC Issuer hereunder
at the application of Borrower.

     "Letter of Credit Fee Rate" means, on any date, with respect to each Letter
of Credit, the Eurodollar Margin then in effect.

     "Leverage Ratio" means, on any day, the ratio of the Consolidated Total
Debt on such day to the Consolidated EBITDA for the four fiscal Quarter Period
ending on the date of the Consolidated balance sheet most recently provided by
Borrower under Section 6.2(a) or (b).

     "Liabilities" means, as to any Person, all indebtedness, liabilities and
obligations of such Person, whether matured or unmatured, liquidated or
unliquidated, primary or secondary, direct or indirect, absolute, fixed or
contingent, and whether or not required to be considered pursuant to GAAP.

     "Lien" means, with respect to any property or assets, any right or interest
therein of a creditor to secure Liabilities owed to it or any other arrangement
with such creditor which provides for the payment of such Liabilities out of
such property or assets or which allows such creditor to have such Liabilities
satisfied out of such property or assets prior to the general creditors of any
owner thereof, including any lien, mortgage, security interest, pledge, deposit,
production payment, rights of a vendor under any title retention or conditional
sale agreement or lease substantially equivalent thereto, tax lien, mechanic's
or materialman's lien, or any other charge or encumbrance for security purposes,
whether arising by Law or agreement or otherwise, but excluding any right of
offset which arises without agreement in the ordinary course of business. "Lien"
also means any filed financing statement, any registration of a pledge (such as
with an issuer of uncertificated securities), or any other arrangement or action
which would serve

                                       18

<PAGE>

to perfect a Lien described in the preceding sentence, regardless of whether
such financing statement is filed, such registration is made, or such
arrangement or action is undertaken before or after such Lien exists.

     "Loan Documents" means this Agreement, the Notes, each Guaranty, the
Security Documents, the Letters of Credit, the LC Applications, the
Intercreditor Agreement (if any), and all other agreements, certificates,
documents, instruments and writings at any time delivered in connection herewith
or therewith (exclusive of term sheets and commitment letters).

     "Loans" has the meaning given to such term in Section 2.1.

     "Majority Lenders" means Lenders whose aggregate Percentage Shares exceed
fifty percent (50%).

     "Material Adverse Change" means any material adverse change from the state
of affairs presented in the Initial Financial Statements or as represented or
warranted in any Loan Document, in (a) Borrower's Consolidated financial
condition, considered as a whole, (b) Borrower's Consolidated business,
operations, properties or condition, considered as a whole, or (c) the validity
or enforceability of the terms of any Loan Document or the rights and remedies
thereunder in a manner that materially reduces the amount of Collateral
effectively subject thereto or materially interferes with the practical
realization of the benefits intended to be provided by the Loan Documents,
considered as a whole. References herein to any event, development or
circumstance that would reasonably be anticipated to cause a Material Adverse
Change means that a reasonable and sophisticated financial institution would
determine that such event, development or circumstance presents a material
possibility (more than remote, but not required to be more probable than not) of
causing a Material Adverse Change.

     "Matured LC Obligations" means all amounts paid by LC Issuer on drafts or
demands for payment drawn or made under or purported to be made under any Letter
of Credit and all other amounts due and owing to LC Issuer under any LC
Application for any Letter of Credit, to the extent the same have not been
repaid to LC Issuer (with the proceeds of Loans or otherwise).

     "Maturity Date" means December 20, 2010.

     "Maximum Drawing Amount" means at the time in question the sum of the
maximum amounts which LC Issuer might then or thereafter be called upon to
advance under all Letters of Credit which are then outstanding.

     "Maximum Senior Credit Amount" means the principal amount of $500,000,000,
as such amount may be reduced by Borrower from time to time as provided in
Section 2.5(f).

     "Moody's" means Moody's Investors Service, Inc., or its successor.

     "National Offshore" means National Offshore LP, a Delaware limited
partnership.

     "National Onshore" means National Onshore LP, a Delaware limited
partnership.

                                       19

<PAGE>

     "NEG Subsidiaries" means NEGI, NEGH, NEGO, NGX Energy, NGX LP, NGX GP, and
Shana National LLC, provided that each such Person shall cease to be a "NEG
Subsidiary" when and if such Person becomes wholly owned, directly or
indirectly, by Borrower.

     "NEGH" means NEG Holding LLC, a Delaware limited liability company.

     "NEGI" means National Energy Group, Inc., a Delaware corporation.

     "NEGO" means NEG Operating LLC, a Delaware limited liability company.

     "NEGO Collateral" means all property of any kind which is subject to a Lien
in favor of Administrative Agent, as collateral agent, granted to secure the
Restated NEGO Credit Facility and certain Hedging Contracts of NEGO.

     "NEGO Credit Facility" means that certain Credit Agreement dated as of
December 29, 2003 among NEGO, Mizuho Corporate Bank, Ltd., as administrative
agent, and certain commercial lending institutions, as lenders.

     "NGX Energy" means NGX Energy Limited Partnership, a Delaware limited
partnership.

     "NGX GP" means NGX GP of Delaware LLC, a Delaware limited liability
company.

     "NGX LP" means NGX LP of Delaware LLC, a Delaware limited liability
company.

     "Note" has the meaning given to such term in Section 2.1.

     "NYMEX" means the New York Mercantile Exchange (or its successor).

     "NYMEX Pricing" means, as of any date of determination with respect to any
month:

          (a) for crude oil, the closing settlement price for the Light, Sweet
     Crude Oil futures contract for the first nearby month, and

          (b) for natural gas, the closing settlement price for the Henry Hub
     Natural Gas futures contract for the first nearby month,

in each case as published by NYMEX on its website currently located at
www.nymex.com, or any successor thereto (as such price may be corrected or
revised from time to time by NYMEX in accordance with its rules and
regulations).

     "Obligations" means all Liabilities from time to time owing by any Credit
Party to any Lender Party under or pursuant to any of the Loan Documents,
including all LC Obligations. "Obligation" means any part of the Obligations.

     "Oil and Gas Properties" means all oil, gas and/or mineral leases, oil, gas
or mineral properties, mineral servitudes and/or mineral rights of any kind
(including, without limitation, mineral fee interests, lease interests, farmout
interests, overriding royalty and royalty interests, net profits interests, oil
payment interests, production payment interests and other types of mineral
interests), and all oil and gas gathering, treating, storage, processing and
handling assets.

                                       20

<PAGE>

     "Other Taxes" means all present or future stamp or documentary taxes or any
other excise or property taxes, charges or similar levies arising from any
payment made hereunder or under any other Loan Document or from the execution,
delivery or enforcement of, or otherwise with respect to, this Agreement or any
other Loan Document.

     "Participant" has the meaning assigned to such term in clause (d) of
Section 10.5.

     "Percentage Share" means, with respect to any Lender (a) when used in
Section 2.1 or Section 2.5, in any Borrowing Notice or when no Loans are
outstanding hereunder, the percentage obtained by dividing such Lender's
Commitment by the Aggregate Commitments, and (b) when used otherwise, the
percentage obtained by dividing (i) the sum of the unpaid principal balance of
such Lender's Loans at the time in question plus the Matured LC Obligations
which such Lender has funded pursuant to Section 2.12(c) plus the portion of the
Maximum Drawing Amount which such Lender might be obligated to fund under
Section 2.12(c), by (ii) the sum of the aggregate unpaid principal balance of
all Loans at such time plus the aggregate amount of LC Obligations outstanding
at such time.

     "Permitted Investments" means:

     (a) Cash Equivalents;

     (b) existing Investments described in the Disclosure Schedule;

     (c) normal and prudent extensions of credit by Credit Parties to their
customers buying goods and services in the ordinary course of business or to
another Credit Party in the ordinary course of business, which extensions shall
not be for longer periods than those extended by similar businesses operated in
a normal and prudent manner;

     (d) extensions of Intercompany Obligations, provided that the only
extensions of Intercompany Obligations from Borrower or any Guarantor to any NEG
Subsidiary that constitute Permitted Investments are the loans from Borrower to
NEGO made pursuant to the Restated NEGO Credit Facility and the Intercompany
Obligations outstanding on the date hereof that are described in clauses (a)
through (d) of the definition of "Intercompany Obligations";

     (e) investments to acquire any Person that, at the time of such
acquisition, becomes a Subsidiary of Borrower and a Guarantor, grants the
Collateral that is required hereunder, and otherwise is in compliance with all
terms of the Loan Documents applicable to Guarantors and Subsidiaries of
Borrower;

     (f) investments under any Hedging Contract permitted hereunder; and

     (g) Investments not described in subsections (a) through (f) above which do
not (taking into account all Investments of all Credit Parties) exceed an
aggregate amount of $5,000,000 during any Fiscal Year.

     "Permitted Liens" means:

                                       21

<PAGE>

     (a) statutory Liens for taxes, assessments or other governmental charges or
levies which are not yet delinquent or which are being contested in good faith
by appropriate action and for which adequate reserves have been maintained in
accordance with GAAP;

     (b) landlords', carriers', warehousemen's, repairmen's, mechanics',
materialmen's, or other like Liens, as well as Liens under operating agreements,
unit agreements, mineral leases, oil and gas leases, processing agreements,
transportation agreements, gas balancing agreements, and other agreements for
the handling of oil and gas production, provided that none of the foregoing
Liens secure Indebtedness, and in each case only to the extent arising in the
ordinary course of business and only to the extent securing obligations which
are not delinquent or which are being contested in good faith by appropriate
proceedings and for which adequate reserves have been maintained in accordance
with GAAP;

     (c) easements, rights of way, restrictions, encroachments and other minor
defects and irregularities in title to any property, so long as such defects and
irregularities neither secure Indebtedness nor materially impair the value of
such property or the use of such property for the purposes for which such
property is held;

     (d) deposits of cash or securities to secure the performance of bids, trade
contracts, leases, statutory obligations and other obligations of a like nature
(excluding appeal bonds) incurred in the ordinary course of business;

     (e) Liens under the Security Documents, including liens securing the Lender
Hedging Obligations

     (f) Liens securing the Restated NEGO Credit Facility, provided such Liens
have been collaterally assigned by Borrower to Administrative Agent, and that
the "Loan Documents" (as defined in the Restated NEGO Credit Facility)
evidencing such Liens have been amended or restated to also secure obligations
arising from time to time under Hedging Contracts entered into between NEGO and
a counterparty that is a Lender or an Affiliate of a Lender;

     (g) purchase money Liens on specific items of equipment and related assets,
as described in Section 7.1(g), securing purchase money Indebtedness
incompliance with Section 7.1(g);

     (h) Liens incurred in the ordinary course of business in connection with
workers' compensation, unemployment insurance and other types of social
security;

     (i) Liens solely on any cash earnest money deposits made by a Credit Party
in connection with any letter of intent or purchase agreement permitted
hereunder;

     (j) purported Liens evidenced by the filing of precautionary UCC financing
statements relating solely to operating leases of personal property entered into
in the ordinary course of business;

     (k) Liens in favor of customs and revenue authorities arising as a matter
of law to secure payment of customs duties in connection with the importation of
goods;

                                       22

<PAGE>

     (l) Liens existing on the date hereof that secure Intercompany Obligations
that have been pledged to Administrative Agent, provided that such Liens have
also been collaterally assigned to Administrative Agent;

     (m) Liens securing "Second Lien Notes" as defined in Schedule 4;

     (n) Liens described on Section 7.2 of the Disclosure Schedule; and

     (o) Liens securing Indebtedness permitted pursuant to Section 7.1(i),
provided that such Liens burden only cash collateral securing letters of credit
with respect to which NEGO, National Onshore or National Offshore is liable.

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

     "Projected Oil and Gas Production" means the projected production of oil or
gas (measured by volume unit or BTU equivalent, not sales price) from properties
and interests owned by the Credit Parties that are located in or offshore of the
United States and that have attributable to them proved oil or gas reserves, as
such production is projected in the Engineering Report most recently delivered,
after deducting projected production from any properties or interests sold or
under contract for sale that had been included in such report and after adding
projected production from any properties or interests that had not been
reflected in such report but that are reflected in a separate or supplemental
report meeting the requirements of Section 6.2(f) or (g) and otherwise are
satisfactory to Administrative Agent.

     "PV10" with respect to oil and gas properties, means, as of any date of
determination, the sum of (a) the present value of future revenues, net of taxes
(other than income taxes), operating expenses and capital expenditures, expected
to be obtained from the applicable proved oil and gas reserves of Borrower and
its Subsidiaries, all as evaluated in the most recently delivered Engineering
Report but (i) discounted at a rate of 10% per annum, (ii) utilizing PV10
Pricing, and (iii) utilizing an annual escalation factor of 3% for operating
expenses for the four complete calendar years following the current calendar
year (or, in the case of a mid-year report, following the current partial
calendar year) that is reported on in such Engineering Report, plus (b) the
aggregate mark-to-market value to Borrower and its Subsidiaries of their Hedging
Contracts, if positive (or less such mark-to-market value, if negative), whether
or not such mark-to-market value is required to be reported under GAAP; provided
that, whenever NEGI and its Subsidiaries are not wholly-owned Subsidiaries of
Borrower, the present value of the future net revenues from the oil and gas
properties of NEGI and its Subsidiaries shall, for the purposes of determining
PV10 of Borrower and its Subsidiaries, be deemed reduced by X in the following
formula, to the extent X is a positive number:

     X = 25% of [A - (B + C + D)]

where:

     A = PV10 of the oil and gas properties owned by NEGI and its Subsidiaries,
         as determined without regard to this proviso,

                                       23

<PAGE>

     B = the amount of the Indebtedness (including accrued interest) owing on
         the effective date of such Engineering Report by NEGI to Borrower or to
         Debt Holdco,

     C = the amount of the preferential future distributions (including interest
         or its equivalent), as accrued on the effective date of such
         Engineering Report, to which Borrower is entitled in its capacity as an
         owner of NEGH as a result of the dedication of other distributions to
         be used to pay Indebtedness described in B above, and

     D = the amount of the Indebtedness (including accrued interest) owing on
         the effective date of such Engineering Report by NEGO to Borrower under
         the Restated NEGO Credit Facility.

     "PV10 Pricing" means:

     (a) for anticipated sales of oil and gas that are fixed in a firm fixed
price sales contract with an investment grade counterparty (or another
counterparty approved by Administrative Agent), the fixed price or prices
provided for in such sales contract during the term thereof; and

     (b) for anticipated sales of oil and gas, if such sales are not under a
sales contract that is described in paragraph (a) above, for the date of
calculation (or, if such date is not a Business Day, for the first Business Day
thereafter), adjusted in each case for historical location and quality
differentials during the twelve months preceding such date of determination:

          (i) for the remainder of the current calendar year (whether a whole or
     partial year), the average NYMEX Pricing for the remaining contracts in the
     current calendar year,

          (ii) for each of the succeeding three complete calendar years, the
     average NYMEX Pricing for the twelve months in each such calendar year, and

          (iii) for the succeeding fourth complete calendar year, and for each
     calendar year thereafter, the average NYMEX Pricing for the twelve months
     in such fourth calendar year.

     "Rating Agency" means either S & P or Moody's.

     "Regulation D" means Regulation D of the Board of Governors of the Federal
Reserve System as from time to time in effect.

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

     "Required Closing Date Hedges" means Hedging Contracts as described on
Schedule 6.

                                       24

<PAGE>

     "Reserve Requirement" means, at any time, the maximum rate at which
reserves (including any marginal, special, supplemental, or emergency reserves)
are required to be maintained under regulations issued from time to time by the
Board of Governors of the Federal Reserve System (or any successor) by member
banks of the Federal Reserve System against "Eurocurrency liabilities" (as such
term is used in Regulation D). Without limiting the effect of the foregoing, the
Reserve Requirement shall reflect any other reserves required to be maintained
by such member banks with respect to (a) any category of liabilities which
includes deposits by reference to which the Adjusted Eurodollar Rate is to be
determined, or (b) any category of extensions of credit or other assets which
include Eurodollar Loans.

     "Restated NEGO Credit Facility" means the NEGO Credit Facility as amended
by that certain Amended and Restated Credit Agreement of even date herewith by
and among NEGO, as borrower, the Borrower, as administrative agent and lender,
and Citicorp USA, Inc., as collateral agent, to provide for up to $180,000,000
of loans thereunder, and as from time to time further amended with the consent
of the Majority Lenders.

     "S & P" means Standard & Poor's Ratings Services (a division of The McGraw
Hill Companies), or its successor.

     "Sarbanes-Oxley" means the Sarbanes-Oxley Act of 2002.

     "Scheduled Determination" has the meaning given to such term in Section
2.9(a).

     "Secured Obligations" means all Obligations and all Lender Hedging
Obligations.

     "Securities Laws" means the Securities Act of 1933, the Securities Exchange
Act of 1934, Sarbanes-Oxley, and, in each case, the rules and regulations of the
U.S. Securities and Exchange Commission promulgated thereunder, and the
applicable accounting and auditing principles, rules, standards and practices
promulgated, approved or incorporated by the U.S. Securities and Exchange
Commission or the Public Company Accounting Oversight Board, as each of the
foregoing may be amended and in effect on any applicable date under this
Agreement.

     "Security Documents" means the instruments listed in the Security Schedule
and all other security agreements, deeds of trust, mortgages, chattel mortgages,
pledges, guaranties, financing statements, continuation statements, extension
agreements and other agreements or instruments now, heretofore, or hereafter
delivered by any Credit Party to Administrative Agent in connection with this
Agreement or any transaction contemplated hereby to secure or guarantee the
payment of any part of the Obligations or the Lender Hedging Obligations or the
performance of any Credit Party's other duties and obligations under the Loan
Documents.

     "Security Schedule" means Schedule 2 hereto.

     "Special Determinations" has the meaning given to such term in Section
2.9(b).

     "Subsidiary" means, with respect to any Person, any corporation,
association, partnership, limited liability company, joint venture, or other
business or corporate entity, enterprise or organization which is directly or
indirectly (through one or more intermediaries)

                                       25

<PAGE>

controlled by or majority owned by such Person, provided that associations,
joint ventures or other relationships (a) which are established pursuant to a
standard form operating agreement or similar agreement or which are partnerships
for purposes of federal income taxation only, (b) which are not corporations or
partnerships (or subject to the Uniform Partnership Act) under applicable state
Law, and (c) whose businesses are limited to the exploration, development and
operation of oil, gas or mineral properties and interests owned directly by the
parties in such associations, joint ventures or relationships, shall not be
deemed to be "Subsidiaries" of such Person.

     "Super Majority Lenders" means Lenders whose aggregate Percentage Shares
equal or exceed sixty-six and two thirds percent (66 2/3%).

     "Taxes" means all present or future taxes, levies, imposts, duties,
deductions, withholdings, assessments, fees or other charges imposed by any
Governmental Authority, including any interest, additions to tax or penalties
applicable thereto.

     "Termination Event" means:

          (a) the occurrence with respect to any ERISA Plan of a reportable
     event described in Section 4043(c) of ERISA other than a reportable event
     not subject to the provision for 30-day notice to the Pension Benefit
     Guaranty Corporation pursuant to a waiver by such corporation under Section
     4043(a) or 4043(b)(4) of ERISA, which could reasonably be expected to
     result in a Termination Event described in subsections (b) through (g)
     below, or

          (b) the withdrawal of any ERISA Affiliate from an ERISA Plan during a
     plan year in which it was a "substantial employer" as defined in Section
     4001(a)(2) of ERISA, or

          (c) the filing of a notice of intent to terminate any ERISA Plan or
     the treatment of any ERISA Plan amendment as a termination under Section
     4041(c) of ERISA, or

          (d) the institution of proceedings to terminate any ERISA Plan by the
     Pension Benefit Guaranty Corporation under Section 4042 of ERISA, or

          (e) any other event or condition which could reasonably be expected to
     result in the termination of, or the appointment of a trustee to
     administer, any ERISA Plan under Section 4042 of ERISA, or

          (f) any ERISA Affiliate incurs withdrawal liability in excess of
     $10,000,000 in respect of any "multiemployer plan" as defined in Section
     4001 of ERISA, or

          (g) any "accumulated funding deficiency" (as defined in Section 412(a)
     of the Internal Revenue Code) in excess of $10,000,000 exists with respect
     to any ERISA Plan, whether or not waived by the Secretary of the Treasury
     or his delegate,

provided that (i) in each of the cases listed in subsections (a), (c), (d) and
(e) above, the then current value of such ERISA Plan's benefit liabilities
exceeds the then current value of such ERISA Plan's assets available for the
payment of such benefit liabilities by more than

                                       26

<PAGE>

$10,000,000, and (ii) in the case of a Termination Event described in subsection
(b) above, the withdrawing employer's proportionate share of such excess
liability exceeds $10,000,000), and provided further that any event described in
subsections (a), (b), (c), (d), (e), (f) or (g) above that occurs with respect
to an ERISA Plan that is not maintained for the benefit of the employees of
Borrower, any of Borrower's Subsidiaries, or IPO Co shall not constitute a
"Termination Event" for the purposes hereof so long as both of the following
conditions are met: (1) no claim is made on any Credit Party to make any payment
or contribution on account of such event that is not paid or otherwise resolved
within 60 days thereafter without any payment by any Credit Party and (2) within
seven days after such claim is made, and thereafter while such claim remains
unpaid or unresolved, the Credit Parties are fully and effectively indemnified
for any losses relating to such event under that certain Undertaking dated as of
November 20, 1998, made by Starfire Holding Corporation, a Delaware corporation,
for the benefit of AREP and its subsidiaries, or under another indemnity
agreement made by an Affiliate of the Credit Parties that has the financial
resources to honor its indemnity obligations.

     "Type" means, with respect to any Loans, the characterization of such Loans
as either Base Rate Loans or Eurodollar Loans.

     Section 1.2. Exhibits and Schedules; Additional Definitions. All Exhibits
and Schedules attached to this Agreement are a part hereof for all purposes.
Reference is hereby made to the Security Schedule for the meaning of certain
terms defined therein and used but not defined herein, which definitions are
incorporated herein by reference.

     Section 1.3. Terms Generally; References and Titles. 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." 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, (e) any reference to any law or regulation herein shall, unless
otherwise specified, refer to such law or regulation as amended, modified or
supplemented from time to time and (f) 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. References to any document, instrument, or
agreement (a) shall include all exhibits, schedules, and other attachments
thereto, and (b) shall include all documents, instruments, or agreements issued
or executed in replacement thereof. Titles appearing at the beginning of any
subdivisions are for convenience only and do not constitute any part of such
subdivisions and shall be disregarded in construing the language contained in
such subdivisions. The phrases "this section" and "this subsection" and similar
phrases refer only to the sections or subsections hereof in which such phrases
occur. The word "or" is not

                                       27

<PAGE>

exclusive. Accounting terms have the meanings assigned to them by GAAP, as
applied by the accounting entity to which they refer. References to "days" shall
mean calendar days, unless the term "Business Day" is used. Unless otherwise
specified, references herein to any particular Person also refer to its
successors and permitted assigns.

     Section 1.4. Calculations and Determinations. All calculations under the
Loan Documents of interest chargeable with respect to Adjusted Base Rate Loans
shall be made on the basis of actual days elapsed (including the first day but
excluding the last) and a year of 365 or 366 days, as appropriate. All other
calculations of interest or fees made under the Loan Documents shall be made on
the basis of actual days elapsed (including the first day but excluding the
last) and a year of 360 days. Each determination by a Lender Party of amounts to
be paid under Article III or any other matters which are to be determined
hereunder by a Lender Party (such as any Eurodollar Rate, Adjusted Eurodollar
Rate, Business Day, Interest Period, or Reserve Requirement) shall, in the
absence of manifest error, be conclusive and binding. Unless otherwise expressly
provided herein or unless Majority Lenders otherwise consent all financial
statements and reports furnished to any Lender Party hereunder shall be prepared
and all financial computations and determinations pursuant hereto shall be made
in accordance with GAAP.

     Section 1.5. Joint Preparation; Construction of Indemnities and Releases.
This Agreement and the other Loan Documents have been reviewed and negotiated by
sophisticated parties with access to legal counsel and no rule of construction
shall apply hereto or thereto which would require or allow any Loan Document to
be construed against any party because of its role in drafting such Loan
Document.

                  ARTICLE II - The Loans and Letters of Credit

     Section 2.1. Commitments to Lend; Notes. Subject to the terms and
conditions hereof, each Lender agrees to make loans to Borrower (herein called
such Lender's "Loans") upon Borrower's request from time to time during the
Commitment Period, provided that (a) subject to Sections 3.3, 3.4 and 3.7, Loans
of the same Type shall be made by Lenders in accordance with their respective
Percentage Shares and as part of the same Borrowing, and (b) after giving effect
to such Loans, the Facility Usage does not exceed the lesser of the Aggregate
Commitments then in effect or the Borrowing Base then in effect. The aggregate
amount of all Loans (other than Loans made pursuant to Section 2.12(b)) in any
Borrowing must be equal to $5,000,000 or any higher integral multiple of
$1,000,000 or must equal the remaining availability under the Borrowing Base.
Borrower may have no more than five Borrowings of Eurodollar Loans outstanding
at any time. The obligation of Borrower to repay to each Lender the aggregate
amount of all Loans made by such Lender, together with interest accruing in
connection therewith, shall be evidenced by a single promissory note (herein
called such Lender's "Note") made by Borrower payable to the order of such
Lender in the form of Exhibit A with appropriate insertions. The amount of
principal owing on any Lender's Note at any given time shall be the aggregate
amount of all Loans theretofore made by such Lender minus all payments of
principal theretofore received by such Lender on such Note. Interest on each
Note shall accrue and be due and payable as provided herein. Each Note shall be
due and payable as provided herein, and

                                       28

<PAGE>

shall be due and payable in full on the Maturity Date. Subject to the terms and
conditions hereof, Borrower may borrow, repay, and reborrow hereunder.

     Section 2.2. Requests for New Loans. Borrower must give to Administrative
Agent written or electronic notice (or telephonic notice promptly confirmed in
writing) of any requested Borrowing of new Loans to be advanced by Lenders. Each
such notice constitutes a "Borrowing Notice" hereunder and must:

     (a) specify (i) the aggregate amount of any such Borrowing of new Base Rate
Loans and the date on which such Base Rate Loans are to be advanced, or (ii) the
aggregate amount of any such Borrowing of new Eurodollar Loans, the date on
which such Eurodollar Loans are to be advanced (which shall be the first day of
the Interest Period which is to apply thereto), and the length of the applicable
Interest Period; and

     (b) be received by Administrative Agent not later than 10:00 a.m., New
York, New York time, on (i) the day on which any such Base Rate Loans are to be
made, or (ii) the third Business Day preceding the day on which any such
Eurodollar Loans are to be made.

     Each such written request or confirmation must be made in the form and
substance of the "Borrowing Notice" attached hereto as Exhibit B, duly
completed. Each such telephonic request shall be deemed a representation,
warranty, acknowledgment and agreement by Borrower as to the matters which are
required to be set out in such written confirmation. Upon receipt of any such
Borrowing Notice, Administrative Agent shall give each Lender prompt notice of
the terms thereof. If all conditions precedent to such new Loans have been met,
each Lender will on the date requested promptly remit to Administrative Agent at
Administrative Agent's office in New York, New York the amount of such Lender's
new Loan in immediately available funds, and upon receipt of such funds, unless
to its actual knowledge any conditions precedent to such Loans have been neither
met nor waived as provided herein, Administrative Agent shall promptly make such
Loans available to Borrower. Unless 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 Administrative Agent such Lender's share of
such Borrowing, Administrative Agent may assume that such Lender has made such
share available on such date in accordance with this Section 2.2 and may, in
reliance upon such assumption, make available to Borrower a corresponding
amount. In such event, if a Lender has not in fact made its share of the
applicable Borrowing available to Administrative Agent, then the applicable
Lender and the Borrower severally agree to pay to 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
a payment to be made by such Lender, the greater of the Federal Funds Rate and a
rate determined by Administrative Agent in accordance with banking industry
rules on interbank compensation and (ii) in the case of a payment to be made by
Borrower, the interest rate applicable to Base Rate Loans. If Borrower and such
Lender shall pay such amount or such interest to Administrative Agent for the
same or an overlapping period, Administrative Agent shall promptly remit to
Borrower the amount so paid by Borrower for such period. If such Lender pays its
share of the applicable Borrowing to Administrative Agent, then the amount so
paid shall constitute such Lender's Loan included in such Borrowing. Any

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<PAGE>

payment by Borrower shall be without prejudice to any claim Borrower may have
against a Lender that shall have failed to make such payment to Administrative
Agent.

     Section 2.3. Continuations and Conversions of Existing Loans. Borrower may
make the following elections with respect to Loans already outstanding: to
convert Base Rate Loans to Eurodollar Loans, to convert Eurodollar Loans to Base
Rate Loans on the last day of the Interest Period applicable thereto, and to
continue Eurodollar Loans beyond the expiration of such Interest Period by
designating a new Interest Period to take effect at the time of such expiration.
In making such elections, Borrower may combine existing Loans made pursuant to
separate Borrowings into one new Borrowing or divide existing Loans made
pursuant to one Borrowing into separate new Borrowings, provided that Borrower
may have no more than five Borrowings of Eurodollar Loans outstanding at any
time. To make any such election, Borrower must give to Administrative Agent
written notice (or telephonic notice promptly confirmed in writing) of any such
conversion or continuation of existing Loans, with a separate notice given for
each new Borrowing. Each such notice constitutes a "Continuation/Conversion
Notice" hereunder and must:

     (a) specify the existing Loans which are to be Continued or Converted;

     (b) specify (i) the aggregate amount of any Borrowing of Base Rate Loans
into which such existing Loans are to be continued or converted and the date on
which such Continuation or Conversion is to occur, or (ii) the aggregate amount
of any Borrowing of Eurodollar Loans into which such existing Loans are to be
continued or converted, the date on which such Continuation or Conversion is to
occur (which shall be the first day of the Interest Period which is to apply to
such Eurodollar Loans), and the length of the applicable Interest Period; and

     (c) be received by Administrative Agent not later than 10:00 a.m., New
York, New York time, on (i) the day on which any such Continuation or Conversion
to Base Rate Loans is to occur, or (ii) the third Business Day preceding the day
on which any such Continuation or Conversion to Eurodollar Loans is to occur.

     Each such written request or confirmation must be made in the form and
substance of the "Continuation/Conversion Notice" attached hereto as Exhibit C,
duly completed. Each such telephonic request shall be deemed a representation,
warranty, acknowledgment and agreement by Borrower as to the matters which are
required to be set out in such written confirmation. Upon receipt of any such
Continuation/Conversion Notice, Administrative Agent shall give each Lender
prompt notice of the terms thereof. Each Continuation/Conversion Notice shall be
irrevocable and binding on Borrower. During the continuance of any Default,
Borrower may not make any election to convert existing Loans into Eurodollar
Loans or continue existing Loans as Eurodollar Loans. If (due to the existence
of a Default or for any other reason) Borrower fails to timely and properly give
any Continuation/Conversion Notice with respect to a Borrowing of existing
Eurodollar Loans at least three days prior to the end of the Interest Period
applicable thereto, such Eurodollar Loans shall automatically be converted into
Base Rate Loans at the end of such Interest Period. No new funds shall be repaid
by Borrower or advanced by any Lender in connection with any Continuation or
Conversion of existing Loans pursuant to this section, and no such Continuation
or Conversion shall be deemed to be a new advance of funds for any

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<PAGE>

purpose; such Continuations and Conversions merely constitute a change in the
interest rate applicable to already outstanding Loans.

     Section 2.4. Use of Proceeds. Borrower shall use all Loans:

     (a) to purchase Indebtedness of NEGO from the lenders under the NEGO Credit
Facility on the Closing Date,

     (b) to make loans of approximately $85,000,000 to National Onshore that
will be used by National Onshore on the Closing Date to repay existing
Indebtedness owed by National Onshore to AREH that was incurred to purchase the
Minden Field properties,

     (c) to finance capital expenditures from time to time,

     (d) to pay a dividend or distribution in the amount of $80,000,000 to AREH
or a Subsidiary of AREH on or shortly after the Closing Date (which dividend or
distribution may be made in part using cash on hand, so long as the condition in
Section 4.1(r) remains satisfied immediately after such dividend or distribution
is made),

     (e) to pay costs of this transaction, and

     (f) to provide working capital from time to time for operations and for
other general business purposes of Borrower and its Subsidiaries.

Borrower shall use all Letters of Credit for the general business purposes of
Borrower and its Subsidiaries. In no event shall the funds from any Loan or any
Letter of Credit be used directly or indirectly by any Person for personal,
family, household or agricultural purposes or for the purpose, whether
immediate, incidental or ultimate, of purchasing, acquiring or carrying any
"margin stock" (as such term is defined in Regulation U promulgated by the Board
of Governors of the Federal Reserve System) or to extend credit to others
directly or indirectly for the purpose of purchasing or carrying any such margin
stock. Borrower represents and warrants that Borrower is not engaged
principally, or as one of Borrower's important activities, in the business of
extending credit to others for the purpose of purchasing or carrying such margin
stock.

     Section 2.5. Interest Rates and Fees; Payment Dates.

     (a) Interest Rates. Subject to subsection (b) below, (i) each Base Rate
Loan shall bear interest on each day outstanding at the Adjusted Base Rate in
effect on such day, and (ii) each Eurodollar Loan shall bear interest on each
day during the related Interest Period at the related Adjusted Eurodollar Rate
in effect on such day.

     (b) Default Rate. If an Event of Default shall have occurred and be
continuing under Section 8.1(a), (b), (h)(i), (h)(ii), or (h)(iii), all
outstanding Loans shall bear interest at the applicable Default Rate. In
addition, if an Event of Default shall have occurred and be continuing (other
than under Section 8.1(a), (b), (h)(i), (h)(ii), or (h)(iii)), Majority Lenders
may, by notice to Borrower, elect to have the outstanding Loans bear interest at
the applicable Default Rate, whereupon such Loans shall bear interest at the
applicable Default Rate until the earlier of

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<PAGE>

(i) the first date thereafter upon which there shall be no Event of Default
continuing and (ii) the date upon which Majority Lenders shall have rescinded
such notice.

     (c) Commitment Fees. In consideration of each Lender's commitment to make
Loans, Borrower will pay to Administrative Agent for the account of each Lender
(i) the amount agreed to by Borrower and Administrative Agent in connection with
the syndication of this Agreement and (ii) a quarterly commitment fee determined
on a daily basis by applying the Commitment Fee Rate to such Lender's Percentage
Share of the Available Borrowing Base determined at the end of each day during
the Commitment Period. This quarterly commitment fee shall be due and payable in
arrears on the last day of each Fiscal Quarter and at the end of the Commitment
Period.

     (d) Administrative Agent's Fees. In addition to all other amounts due to
Administrative Agent under the Loan Documents, Borrower will pay fees to
Administrative Agent as described in a letter agreement dated as of November 7,
2005 between Administrative Agent and Borrower.

     (e) Payment Dates. On each Interest Payment Date relating to Base Rate
Loans, Borrower shall pay to the Lenders all unpaid interest which has accrued
on the Base Rate Loans to but not including such Interest Payment Date. On each
Interest Payment Date relating to a Eurodollar Loan, Borrower shall pay to
Lenders all unpaid interest which has accrued on such Eurodollar Loan to but not
including such Interest Payment Date.

     (f) Reductions in Maximum Senior Credit Amount. Until the termination of
the Commitment Period, Borrower may, upon three (3) Business Days prior written
notice to Administrative Agent, reduce the Maximum Senior Credit Amount from the
then designated amount to any lesser amount, provided that the amount of any
such reduction must be equal to $5,000,000 or any higher integral multiple of
$1,000,000. Any such reduction by Borrower of a Maximum Senior Credit Amount
shall be effective as of such third Business Day (or any later date as designed
by Borrower in such written notice) and shall continue in effect until the next
date as of which the Maximum Senior Credit Amount is so reduced.

     Section 2.6. Optional Prepayments. Borrower may, (a) upon one Business
Days' notice to Administrative Agent with respect to any Base Rate Loan and (b)
upon three Business Days' notice to each Lender with respect to any Eurodollar
Loan, from time to time and without premium or penalty prepay the Notes, in
whole or in part, provided (i) that the aggregate amounts of all partial
prepayments of principal on the Notes equals $5,000,000 or any higher integral
multiple of $1,000,000, (ii) that Borrower does not make any prepayments which
would reduce the aggregate unpaid principal balance of all Loans to less than
$10,000,000 without first either (1) terminating this Agreement or (2) providing
assurance satisfactory to Administrative Agent in its discretion that Lenders'
legal rights under the Loan Documents are in no way adversely affected by such
reduction, and (iii) that if Borrower prepays any Eurodollar Loan on any day
other than the last day of the Interest Period applicable thereto, it shall pay
to Lenders any amounts due under Section 3.4. Each prepayment of principal under
this section shall be accompanied by all interest then accrued and unpaid on the
principal so prepaid. Any principal or interest prepaid pursuant to this section
shall be in addition to, and not in lieu of, all payments otherwise required to
be paid under the Loan Documents at the time of such prepayment.

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<PAGE>

     Section 2.7. Mandatory Prepayments

     (a) If at any time the Facility Usage exceeds the Maximum Senior Credit
Amount (whether due to a reduction in the Maximum Senior Credit Amount in
accordance with this Agreement, or otherwise), Borrower shall immediately upon
demand prepay the principal of the Loans (and after all Loans are repaid in
full, provide LC Collateral in accordance with Section 2.15(a)) in an amount at
least equal to such excess.

     (b) If at any time the Facility Usage is less than the Maximum Senior
Credit Amount but in excess of the Borrowing Base (such excess being herein
called a "Borrowing Base Deficiency"), Borrower shall, within five Business Days
after Administrative Agent gives notice of such fact to Borrower, either:

          (i) give notice to Administrative Agent electing to prepay the
     principal of the Loans (and after all Loans are repaid in full, provide LC
     Collateral in accordance with Section 2.15(a)) in an aggregate amount at
     least equal to such Borrowing Base Deficiency (or, if the Loans have been
     paid in full, pay to LC Issuer LC Collateral as required under Section 2.15
     (a)), and thereupon 50% of such prepayment must be made on or before the
     ninetieth day after such notice by Administrative Agent to Borrower of such
     Borrowing Base Deficiency and the remainder of such prepayment must be made
     in full on or before the one-hundred and eightieth day after such notice by
     Administrative Agent to Borrower of such Borrowing Base Deficiency; or

          (ii) give notice to Administrative Agent that Borrower desires to
     provide Administrative Agent with (A) a supplemental Engineering Report
     covering new Oil and Gas Properties not previously the subject of the
     immediately preceding Engineering Report and (B) deeds of trust, mortgages,
     chattel mortgages, security agreements, financing statements and other
     Security Documents (including amendments to Security Documents already
     covering NEGO Collateral or other Collateral) in form and substance
     satisfactory to Administrative Agent, granting, confirming, and perfecting
     Liens, subject only to Permitted Liens, in such new Oil and Gas Properties
     to Administrative Agent, to the extent needed to allow Super Majority
     Lenders to increase the Borrowing Base (as they determine in accordance
     with Section 2.9(c)) to an amount which eliminates such Borrowing Base
     Deficiency, and then provide such Security Documents within thirty days
     after Administrative Agent specifies such Collateral to Borrower. If, prior
     to any such specification by Administrative Agent, Super Majority Lenders
     determine that the giving of such Security Documents will not serve to
     eliminate such Borrowing Base Deficiency, then, within five Business Days
     after receiving notice of such determination from Administrative Agent,
     Borrower will elect to make, and thereafter make, the prepayments specified
     in subsection (i) of this subsection (b).

     (c) If the proceeds, net of transaction costs, from (i) the Initial Equity
Offering and (ii) the borrowing or issuance of Allowed Second Lien/Unsecured
Indebtedness (if it is incurred substantially concurrently with the Initial
Equity Offering) exceed $210,000,000, then at such time Borrower will prepay the
Loans in an amount equal to such excess proceeds, provided that Borrower will
not be obligated to prepay more than $125,000,000 under this subsection (c).
Such prepayments will not reduce the Commitments or the Borrowing Base.

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<PAGE>

     (d) Immediately upon the consummation by Borrower of the incurrence of any
Indebtedness other than Indebtedness permitted by Section 7.1, Borrower shall
make a mandatory prepayment of the principal of the Loans in an amount equal to
one hundred percent (100%) of the proceeds (net of any usual and customary
transaction costs) received from such incurrence of Indebtedness, whereupon the
Borrowing Base shall be immediately reduced by the same amount until the next
determination of the Borrowing Base.

     (e) Each prepayment of principal under this section shall be accompanied by
all interest then accrued and unpaid on the principal so prepaid. Any principal
or interest prepaid pursuant to this section shall be in addition to, and not in
lieu of, all payments otherwise required to be paid under the Loan Documents at
the time of such prepayment.

     Section 2.8. Initial Borrowing Base. Until the first Determination Date the
Borrowing Base shall be $335,000,000.

     Section 2.9. Subsequent Determinations of Borrowing Base. Upon each
designation of a new Borrowing Base on a Scheduled Determination or a Special
Determination, Administrative Agent shall notify Borrower of the new Borrowing
Base which designation shall take effect immediately on the date such notice is
sent (each such date, a "Determination Date") and shall remain in effect until,
but not including, the next Determination Date (subject to Section 2.7(c)). The
Borrowing Base shall be determined in accordance with the following methodology:

     (a) By March 31 and September 30 of each year beginning March 31, 2006,
Borrower shall furnish to Administrative Agent (with sufficient copies for each
Lender of any information provided on paper, computer disks, or other tangible
media) the Engineering Report then required under Section 6.2(f) or (g) together
with all information, reports and data that Administrative Agent requests
concerning the businesses and properties of Borrower and its Subsidiaries
(including their Oil and Gas Properties and the reserves and production relating
thereto) and, until such time as the Allowed Second Lien/Unsecured Indebtedness
has been issued, Borrower's written request to Lenders to either (i) determine
the Borrowing Base assuming that such Indebtedness will be issued during the
following six months or (ii) determine the Borrowing Base assuming that such
Indebtedness will not be issued during the following six months. (Any failure of
Borrower to make such a request shall be deemed a request to assume that such
Indebtedness will be issued.) Within 30 days after receiving such Engineering
Report, information, reports and data, or as promptly thereafter as practicable,
Administrative Agent shall designate a Borrowing Base following the procedures
in subsection (c) below. Each such determination of the Borrowing Base is herein
called a "Scheduled Determination". If Borrower does not furnish all such
information, reports and data by the date specified in the first sentence of
this Section, Administrative Agent may nonetheless designate the Borrowing Base
at any amount that Super Majority Lenders determine (or, in the case of an
increase, that all Lenders determine) and the Borrowing Base may similarly be
designated from time to time thereafter until each Lender receives all such
information, reports and data, whereupon the Lenders shall designate a new
Borrowing Base as described above. In doing the foregoing, each Lender shall
consider the loan collateral value which it in its judgment assigns to the
various Oil and Gas Properties included in the Collateral at the time in
question (using its then customary pricing and discount models and assumptions
(rather than PV10 Pricing), adjusted as deemed appropriate for

                                       34

<PAGE>

Borrower's and its Subsidiaries' properties and production) and such other
credit factors (including without limitation Borrower's requested assumption
concerning Allowed Second Lien/Unsecured Indebtedness and the assets,
liabilities, cash flow, hedged and unhedged exposure to prices and interest
rates, drilling risks, business, properties, and prospects of Borrower and its
Subsidiaries) as such Lender deems relevant. It is expressly understood and
agreed that Lenders and Administrative Agent have no obligation to agree upon or
designate the Borrowing Base at any particular amount, whether in relation to
the Aggregate Commitments or otherwise, and Lenders and Administrative Agent may
designate a Borrowing Base that is less than, equal to, or more than the
Aggregate Commitments. The commitment fees under Section 2.5 shall be calculated
based on the lesser of the Borrowing Base and the Aggregate Commitments, and
such lesser amount shall, to the extent permitted by Law and regulatory
authorities, be used for the purposes of capital adequacy determination and
determining reimbursements under Section 3.2.

     (b) In addition to Scheduled Determinations, Borrower may request the
Lenders to make an additional determination of the Borrowing Base once during
each twelve month interval between Scheduled Determinations based on January 1
Engineering Reports, and Administrative Agent also may (and at the request of
Super Majority Lenders must) request the Lenders to make an additional
determination of the Borrowing Base once during each twelve month interval
between Scheduled Determinations based on January 1 Engineering Reports.
Administrative Agent shall give notice to Borrower of any such request made by
Administrative Agent to the Lenders. Borrower shall submit any such request made
by Borrower to Administrative Agent and each Lender and, at the time of such
request, Borrower shall (i) deliver to Administrative Agent and each Lender an
updated Engineering Report prepared either by Borrower or by independent
petroleum engineers, and (ii) notify Administrative Agent and each Lender of the
Borrowing Base requested by Borrower. Any determination of the Borrowing Base
made pursuant to a request under this subsection (b) is herein called a "Special
Determination". Any Special Determination shall be made by Lenders in accordance
with the procedures set forth in Section 2.9(c), provided, however, that
Borrower shall not be required to deliver an updated Engineering Report to
Administrative Agent and Lenders in connection with any Special Determination
requested by Administrative Agent.

     (c) Administrative Agent shall (within 30 days after receiving the
information required for a Scheduled Determination or a Special Determination),
having consulted with Borrower, propose to the Lenders a specific Borrowing Base
amount for the Lenders to approve or disapprove. Within fifteen days thereafter
each Lender shall respond to Administrative Agent in writing, either approving
such proposed amount or setting out a reasonable alternative amount (based on
the criteria described in clause (a) above), and any Lender's failure to respond
to such proposal within such time will be deemed approval. After receiving such
responses or deemed responses from all Lenders, Administrative Agent will
designate the new Borrowing Base at the highest amount approved (i) by all
Lenders, in the case of an increase to the then current Borrowing Base, or (ii)
at the highest amount approved by Super Majority Lenders, in the case of a
reduction to or continuation of the then current Borrowing Base.

     (d) In addition to the foregoing, Administrative Agent and Lenders shall
also have the right to redetermine the Borrowing Base (which shall not count as
a Special Determination but which shall otherwise be done in accordance with the
procedures set forth in Section 2.9(c)) if

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<PAGE>

Borrower or any Subsidiaries sell or otherwise transfer (excluding only
transfers to Borrower or a Subsidiary of Borrower that is a Guarantor) Oil and
Gas Properties that, on a cumulative basis since the then most recent
Determination Date, represent more than ten percent of the value of all of their
proved reserves, as determined in the most recently delivered Engineering
Report. Borrower will immediately pay any Borrowing Base Deficiency that results
from this redetermination.

     Section 2.10. Letters of Credit. Subject to the terms and conditions
hereof, Borrower may at any time during the Commitment Period request LC Issuer
to issue, amend or extend the expiration date of, one or more Letters of Credit
denominated in U.S. Dollars, provided that, after taking such Letter of Credit
into account:

     (a) the Facility Usage does not exceed the Borrowing Base at such time;

     (b) the aggregate amount of LC Obligations at such time does not exceed the
LC Sublimit;

     (c) the expiration date of such Letter of Credit (taking into account any
extensions thereof) is prior to the date which is five days prior to the end of
the Commitment Period;

     (d) such Letter of Credit is to be used for general corporate purposes of
Borrower or any Subsidiary of Borrower;

     (e) such Letter of Credit is not directly or indirectly used to assure
payment of or otherwise support any Indebtedness of any Credit Party that is not
permitted hereunder or any Indebtedness of any other Person;

     (f) the issuance of such Letter of Credit will be in compliance with all
applicable governmental restrictions, policies, and guidelines and will not
subject LC Issuer to any cost which is not reimbursable under Article III;

     (g) the amount, form and terms of such Letter of Credit are acceptable to
LC Issuer in its sole and absolute discretion (subject only to extension terms
acceptable to such LC Issuer);

     (h) the expiration date of such Letter of Credit is not more than one year
from the date of issuance of such Letter of Credit; provided that any Letter of
Credit may provide for the renewal thereof for additional one-year periods that
otherwise comply with the requirements of this Section 2.10 so long as the LC
Issuer has the power to prevent such renewals by giving notice of its decision
to do so;

     (i) no Lender obligated to participate in such Letter of Credit is in
default of its obligations hereunder to Administrative Agent of LC Issuer; and

     (j) all other conditions in this Agreement to the issuance of such Letter
of Credit have been satisfied.

LC Issuer will honor any such request if the foregoing conditions (a) through
(j) (the "LC Conditions") have been met as of the date of issuance of such
Letter of Credit. LC Issuer may

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<PAGE>

choose to honor any such request for any other Letter of Credit but has no
obligation to do so and may refuse to issue any other requested Letter of Credit
for any reason which LC Issuer in its sole discretion deems relevant.

     Section 2.11. Requesting Letters of Credit. Borrower must make written
application for any Letter of Credit at least five Business Days (or such
shorter period as LC Issuer may in its discretion from time to time agree)
before the date on which Borrower desires for LC Issuer to issue such Letter of
Credit. By making any such written application Borrower shall be deemed to have
represented and warranted that the LC Conditions described in Section 2.10 will
be met as of the date of issuance of such Letter of Credit. Each such written
application for a Letter of Credit must be made in writing in the form and
substance of Exhibit F, the terms and provisions of which are hereby
incorporated herein by reference (or in such other form as may mutually be
agreed upon by LC Issuer and Borrower). Two Business Days after the LC
Conditions for a Letter of Credit have been met as described in Section 2.10 (or
if LC Issuer otherwise desires to issue such Letter of Credit), LC Issuer will
issue such Letter of Credit at LC Issuer's office in New York, New York. If any
provisions of any LC Application conflict with any provisions of this Agreement,
the provisions of this Agreement shall govern and control. Borrower shall
promptly examine a copy of each Letter of Credit and each amendment thereto that
is delivered to it and, in the event of any claim of noncompliance with
Borrower's instructions or other irregularity, Borrower will immediately notify
LC Issuer.

     Section 2.12. Reimbursement and Participations.

     (a) Reimbursement by Borrower. Each Matured LC Obligation shall constitute
a loan by LC Issuer to Borrower. Borrower promises to pay to LC Issuer, or to LC
Issuer's order, on demand, the full amount of each Matured LC Obligation,
together with interest thereon (i) at the rate applicable to Base Rate Loans to
and including the first Business Day after such demand is made by LC Issuer and
(ii) at the Default Rate applicable to Base Rate Loans on each day thereafter.
The obligation of Borrower to reimburse LC Issuer for each Matured LC Obligation
shall be absolute, unconditional and irrevocable, and shall be paid strictly in
accordance with the terms of this Agreement (including any LC Application) under
all circumstances, including the following: (i) any lack of validity or
enforceability of such Letter of Credit or any other agreement or instrument
relating thereto; (ii) the existence of any claim, counterclaim, set-off,
defense or other right that Borrower may have at any time against any
beneficiary or any transferee of such Letter of Credit (or any Person for whom
any such beneficiary or any such transferee may be acting), LC Issuer or any
other Person, whether in connection with this Agreement, the transactions
contemplated hereby or by such Letter of Credit or any agreement or instrument
relating thereto, or any unrelated transaction; (iii) any draft, demand,
certificate or other document presented under such Letter of Credit proving to
be forged, fraudulent, invalid or insufficient in any respect or any statement
therein being untrue or inaccurate in any respect; or any loss or delay in the
transmission or otherwise of any document required in order to make a drawing
under such Letter of Credit; (iv) any payment by LC Issuer under such Letter of
Credit against presentation of a draft or certificate that does not strictly
comply with the terms of such Letter of Credit; or (v) any other circumstance or
happening whatsoever, whether or not similar to any of the foregoing. Without
limiting the generality of the foregoing, it is expressly agreed that the
absolute and unconditional nature of Borrower's obligations under this section
to reimburse LC Issuer for each drawing under a Letter of Credit will not be
excused by the gross

                                       37

<PAGE>

negligence or willful misconduct of LC Issuer. However, the foregoing shall not
be construed to excuse LC Issuer from liability to Borrower to the extent of any
direct damages (as opposed to consequential damages, claims in respect of which
are hereby waived by Borrower to the extent permitted by applicable Law)
suffered by Borrower that are caused by LC Issuer's gross negligence or willful
misconduct in determining whether drafts and other documents presented under a
Letter of Credit substantially comply with the terms thereof.

     (b) Letter of Credit Advances. If the beneficiary of any Letter of Credit
makes a draft or other demand for payment thereunder then Borrower may, during
the interval between the making thereof and the honoring thereof by LC Issuer,
request Lenders to make Loans to Borrower in the amount of such draft or demand,
which Loans shall be made concurrently with LC Issuer's payment of such draft or
demand and shall be immediately used by LC Issuer to repay the amount of the
resulting Matured LC Obligation. Such a request by Borrower shall be made in
compliance with all of the provisions hereof, provided that for the purposes of
the first sentence of Section 2.1(a), the amount of such Loans shall be
considered in determining the Facility Usage, but the amount of the Matured LC
Obligation to be concurrently paid by such Loans shall not be considered in
determining the Facility Usage.

     (c) Participation by Lenders. LC Issuer irrevocably agrees to grant and
hereby grants to each Lender, and -- to induce LC Issuer to issue Letters of
Credit hereunder -- each Lender irrevocably agrees to accept and purchase and
hereby accepts and purchases from LC Issuer, on the terms and conditions
hereinafter stated and for such Lender's own account and risk, an undivided
interest equal to such Lender's Percentage Share of LC Issuer's obligations and
rights under each Letter of Credit issued hereunder and the amount of each
Matured LC Obligation paid by LC Issuer thereunder. Each Lender unconditionally
and irrevocably agrees with LC Issuer that, if a Matured LC Obligation is paid
under any Letter of Credit for which LC Issuer is not reimbursed in full by
Borrower in accordance with the terms of this Agreement and the related LC
Application (including any reimbursement by means of concurrent Loans or by the
application of LC Collateral), such Lender shall (in all circumstances and
without set-off or counterclaim) pay to LC Issuer on demand, in immediately
available funds at LC Issuer's address for notices hereunder, such Lender's
Percentage Share of such Matured LC Obligation (or any portion thereof which has
not been reimbursed by Borrower). Each Lender's obligation to pay LC Issuer
pursuant to the terms of this subsection is irrevocable and unconditional. If
any amount required to be paid by any Lender to LC Issuer pursuant to this
subsection is paid by such Lender to LC Issuer within three Business Days after
the date such payment is due, LC Issuer shall in addition to such amount be
entitled to recover from such Lender, on demand, interest thereon calculated
from such due date at the Federal Funds Rate. If any amount required to be paid
by any Lender to LC Issuer pursuant to this subsection is not paid by such
Lender to LC Issuer within three Business Days after the date such payment is
due, LC Issuer shall in addition to such amount be entitled to recover from such
Lender, on demand, interest thereon calculated from such due date at the Default
Rate applicable to Base Rate Loans.

     (d) Distributions to Participants. Whenever LC Issuer has in accordance
with this section received from any Lender payment of such Lender's Percentage
Share of any Matured LC Obligation, if LC Issuer thereafter receives any payment
of such Matured LC Obligation or any payment of interest thereon (whether
directly from Borrower or by application of LC Collateral or otherwise, and
excluding only interest for any period prior to LC Issuer's demand

                                       38

<PAGE>

that such Lender make such payment of its Percentage Share), LC Issuer will
distribute to such Lender its Percentage Share of the amounts so received by LC
Issuer; provided, however, that if any such payment received by LC Issuer must
thereafter be returned by LC Issuer, such Lender shall return to LC Issuer the
portion thereof which LC Issuer has previously distributed to it.

     (e) Calculations. A written advice setting forth in reasonable detail the
amounts owing under this section, submitted by LC Issuer to Borrower or any
Lender from time to time, shall be conclusive, absent manifest error, as to the
amounts thereof.

     Section 2.13. Letter of Credit Fees. In consideration of LC Issuer's
issuance of any Letter of Credit, Borrower agrees to pay (a) to Administrative
Agent, for the account of all Lenders in accordance with their respective
Percentage Shares, a letter of credit issuance fee at a rate equal to the Letter
of Credit Fee Rate then in effect (which shall be increased by two percent
(2.00%) per annum during any period in which interest on the Loans accrues at
the Default Rate), and (b) to such LC Issuer for its own account, a letter of
credit fronting fee at a rate equal to one-quarter percent (.25%) per annum
times the face amount of such Letter of Credit (but in no event less than $500
per annum). In addition, Borrower will pay to LC Issuer the LC Issuer's
customary fees for administrative issuance, amendment and drawing of each Letter
of Credit. The letter of credit fee and the letter of credit fronting fee will
be calculated on the undrawn face amount of each Letter of Credit outstanding on
each day at the above-applicable rates and will be due and payable in arrears on
the last day of each Fiscal Quarter and at the end of the Commitment Period.

     Section 2.14. No Duty to Inquire.

     (a) Drafts and Demands. LC Issuer is authorized and instructed to accept
and pay drafts and demands for payment under any Letter of Credit without
requiring, and without responsibility for, any determination as to the existence
of any event giving rise to said draft, either at the time of acceptance or
payment or thereafter. LC Issuer is under no duty to determine the proper
identity of anyone presenting such a draft or making such a demand (whether by
tested telex or otherwise) as the officer, representative or agent of any
beneficiary under any Letter of Credit, and payment by LC Issuer to any such
beneficiary when requested by any such purported officer, representative or
agent is hereby authorized and approved. Borrower releases each Lender Party
from, and agrees to hold each Lender Party harmless and indemnified against, any
liability or claim in connection with or arising out of the subject matter of
this section, which indemnity shall apply whether or not any such liability or
claim is in any way or to any extent caused, in whole or in part, by any
negligent act or omission of any kind by any Lender Party, provided only that no
Lender Party shall be entitled to indemnification for that portion, if any, of
any liability or claim which is proximately caused by its own individual gross
negligence or willful misconduct, as determined in a final judgment.

     (b) Extension of Maturity. If the maturity of any Letter of Credit is
extended by its terms or by Law or governmental action, if any extension of the
maturity or time for presentation of drafts or any other modification of the
terms of any Letter of Credit is made at the request of any Credit Party, or if
the amount of any Letter of Credit is increased at the request of any Credit
Party, this Agreement shall be binding upon all Credit Parties with respect to
such Letter of Credit as so extended, increased or otherwise modified, with
respect to drafts and property

                                       39

<PAGE>

covered thereby, and with respect to any action taken by LC Issuer, LC Issuer's
correspondents, or any Lender Party in accordance with such extension, increase
or other modification.

     (c) Transferees of Letters of Credit. If any Letter of Credit provides that
it is transferable, LC Issuer shall have no duty to determine the proper
identity of anyone appearing as transferee of such Letter of Credit, nor shall
LC Issuer be charged with responsibility of any nature or character for the
validity or correctness of any transfer or successive transfers, and payment by
LC Issuer to any purported transferee or transferees as determined by LC Issuer
is hereby authorized and approved, and Borrower releases each Lender Party from,
and agrees to hold each Lender Party harmless and indemnified against, any
liability or claim in connection with or arising out of the foregoing, which
indemnity shall apply whether or not any such liability or claim is in any way
or to any extent caused, in whole or in part, by any negligent act or omission
of any kind by any Lender Party, provided only that no Lender Party shall be
entitled to indemnification for that portion, if any, of any liability or claim
which is proximately caused by its own individual gross negligence or willful
misconduct, as determined in a final judgment.

     (d) Applicability of ISP and UCP. Unless otherwise expressly agreed by LC
Issuer and Borrower when a Letter of Credit is issued, (i) the rules of the
"International Standby Practices 1998" of the Institute of International Banking
Law & Practice, as most recently published by the International Chamber of
Commerce at the time of issuance, shall apply to each standby Letter of Credit,
and (ii) the rules of the Uniform Customs and Practice for Documentary Credits,
as most recently published by the International Chamber of Commerce at the time
issuance, shall apply to each commercial Letter of Credit.

     Section 2.15. LC Collateral.

     (a) LC Obligations in Excess of Borrowing Base. If, after the making of all
mandatory prepayments required under Section 2.7, the outstanding LC Obligations
will exceed the Borrowing Base, then in addition to prepayment of the entire
principal balance of the Loans Borrower will immediately pay to LC Issuer an
amount equal to such excess. LC Issuer will hold such amount as security for the
remaining LC Obligations (all such amounts held as security for LC Obligations
being herein collectively called "LC Collateral") and the other Obligations, and
such collateral may be applied from time to time to any Matured LC Obligations
or other Obligations which are due and payable. Neither this subsection nor the
following subsection shall, however, limit or impair any rights which LC Issuer
may have under any other document or agreement relating to any Letter of Credit,
LC Collateral or LC Obligation, including any LC Application, or any rights
which any Lender Party may have to otherwise apply any payments by Borrower and
any LC Collateral under Section 3.1.

     (b) Acceleration of LC Obligations. If the Obligations or any part thereof
become immediately due and payable pursuant to Section 8.1 then, unless Majority
Lenders otherwise specifically elect to the contrary (which election may
thereafter be retracted by Majority Lenders at any time), all LC Obligations
shall become immediately due and payable without regard to whether or not actual
drawings or payments on the Letters of Credit have occurred, and Borrower shall
be obligated to pay to LC Issuer immediately an amount equal to the aggregate LC
Obligations which are then outstanding, which amount shall be held by LC Issuer
as LC Collateral securing the remaining LC Obligations and the other
Obligations, and such LC

                                       40

<PAGE>

Collateral may be applied from time to time to any Matured LC Obligations or any
other Obligations which are due and payable.

     (c) Investment of LC Collateral. Pending application thereof, all LC
Collateral shall be invested by LC Issuer in such Investments as LC Issuer may
choose in its reasonable discretion. All interest on (and other proceeds of)
such Investments shall be reinvested or applied to Matured LC Obligations or
other Obligations which are due and payable. When all Obligations have been
satisfied in full, including all LC Obligations, all Letters of Credit have
expired or been terminated, and all of Borrower's reimbursement obligations in
connection therewith have been satisfied in full, LC Issuer shall release any
remaining LC Collateral to Borrower or the Person who provided such Collateral.
Borrower hereby assigns and grants to LC Issuer a continuing security interest
in all LC Collateral paid by it to LC Issuer, all Investments purchased with
such LC Collateral, and all proceeds thereof to secure its Matured LC
Obligations and its Obligations under this Agreement, each Note, and the other
Loan Documents, and Borrower agrees that LC Issuer shall have with respect to
all LC Collateral, Investments and proceeds all the rights and remedies under
the Security Documents insofar as such Security Documents apply with respect to
security interests in personal property. Borrower further agrees that LC Issuer
shall have all of the rights and remedies of a secured party under the Uniform
Commercial Code as adopted in the State of New York with respect to such
security interest and that an Event of Default under this Agreement shall
constitute a default for purposes of such security interest.

     (d) Payment of LC Collateral. When Borrower is required to provide LC
Collateral for any reason and fails to do so on the day when required, LC Issuer
or Administrative Agent may without prior notice to Borrower or any other Credit
Party provide such LC Collateral (whether by application of proceeds of other
Collateral, by transfers from other accounts maintained with LC Issuer, or
otherwise) using any available funds of Borrower or any other Person also liable
to make such payments. Any such amounts which are required to be provided as LC
Collateral and which are not provided on the date required shall, for purposes
of each Security Document, be considered past due Obligations owing hereunder,
and Administrative Agent and LC Issuer are hereby authorized to exercise its
respective rights under each Security Document to obtain such amounts.

     Section 2.16. Obligations of Lenders Several. The obligations of the
Lenders hereunder to make Loans, to fund participations in Letters of Credit and
to make payments pursuant to Section 10.4(c) are several and not joint. The
failure of any Lender to make any Loan, to fund any such participation, or to
make any payment under Section 10.4(c) on any date required hereunder shall not
relieve any other Lender of its corresponding obligation to do so on such date,
and no Lender shall be responsible for the failure of any other Lender to so
make its Committed Loan, to purchase its participation or to make its payment
under Section 10.4(c).

     Section 2.17. Increase in Commitments.

     (a) If and when Lenders designate a Borrowing Base that exceeds the
Aggregate Commitments then in effect, Borrower and Administrative Agent may,
without any further consent of any of the Lenders, from time to time cause an
increase in the Aggregate Commitments by adding to this Agreement one or more
additional Lenders or by allowing one or

                                       41

<PAGE>

more Lenders to increase their respective Commitments, provided, however, that
(i) each such additional Lender shall be an Eligible Assignee, (ii) the
conditions precedent for additional Loans that are set out in Section 4.2 are
then satisfied, (iii) no such increase shall result in the Aggregate Commitments
exceeding the Maximum Senior Credit Amount, (iv) no such increase shall result
in the Aggregate Commitments exceeding the Borrowing Base then in effect, and
(v) no Lender's Commitment shall be increased without such Lender's consent. Any
such addition of an additional Lender or increase in a Lender's Commitment shall
be evidenced by a Commitment Increase Agreement executed by such Lender,
Borrower, and Administrative Agent substantially in the form of Exhibit G
hereto, which shall contain a revised Schedule 5 that shall thereupon be the
Lenders Schedule for the purposes of this Agreement.

     (b) If the Aggregate Commitments are increased in accordance with this
section, Administrative Agent and Borrower shall determine the effective date
(the "Increase Effective Date") and the final allocation of such increase.
Administrative Agent shall promptly notify Borrower and Lenders of the final
allocation of such increase and the Increase Effective Date. As a condition
precedent to such increase, Borrower shall deliver to Administrative Agent a
certificate of each Credit Party dated as of the Increase Effective Date (in
sufficient copies for each Lender) executed by such Credit Party (i) certifying
and attaching the resolutions adopted by such Credit Party approving or
consenting to such increase, and (ii) in the case of Borrower, certifying that
the conditions precedent for additional Loans that are set out in Section 4.2
are then satisfied, before and after giving effect to such increase. Borrower
shall prepay any Loans outstanding on the Increase Effective Date (and pay any
additional amounts required pursuant to Section 3.4), and shall borrow new Loans
from the Lender whose Commitments have increased, to the extent necessary to
keep the outstanding Loans ratable with any revised Percentage Shares arising
from any nonratable increase in the Commitments under this section.

     (c) Notwithstanding the normal provisions for borrowings or prepayments
hereunder, Lenders hereby authorize Borrower to make non-ratable borrowings and
prepayments of the Loans (and if any such prepayment requires the payment of
Eurodollar Loans other than on the last day of the applicable Interest Period,
Borrower shall pay any required amounts pursuant to Section 3.4) in order to
ensure that the Loans of the Lenders shall be outstanding on a ratable basis in
accordance with their Percentage Shares.

     (d) This section shall supersede any provisions in Section 10.1 to the
contrary.

                       ARTICLE III - Payments to Lenders

     Section 3.1. General Procedures. Borrower will make each payment which it
owes under the Loan Documents to Administrative Agent for the account of the
Lender Party to whom such payment is owed, in lawful money of the United States
of America, without set-off, deduction or counterclaim, and in immediately
available funds. Each such payment must be received by Administrative Agent not
later than 12:00 noon, New York, New York time, on the date such payment becomes
due and payable. Any payment received by Administrative Agent after such time
will be deemed to have been made on the next following Business Day. Should any
such payment become due and payable on a day other than a Business Day, the
maturity of such payment shall be extended to the next succeeding Business Day,
and, in the case of a

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<PAGE>

payment of principal or past due interest, interest shall accrue and be payable
thereon for the period of such extension as provided in the Loan Document under
which such payment is due. Each payment under a Loan Document shall be due and
payable at the payment address set forth for Administrative Agent on the Lenders
Schedule.

     (b) When Administrative Agent collects or receives proceeds of Collateral,
it shall allocate such proceeds among the secured parties (including hedge
counterparties) for whose benefit it holds such Collateral in accordance with
the relevant Security Document and the Intercreditor Agreement, and
Administrative Agent shall then distribute in accordance with the following
subsection (c) of this section the portions of such proceeds that are allocable
to the Lender Parties. When Administrative Agent collects or receives proceeds
of NEGO Collateral, it shall allocate such proceeds among the secured parties
for whose benefit it holds such NEGO Collateral in accordance with the relevant
Security Document and the Intercreditor Agreement, provided that all proceeds
otherwise allocable to Borrower shall be allocated to the Lender Parties, and
Administrative Agent shall then distribute in accordance with the following
subsection (c) of this section the portions of such proceeds that are allocable
to the Lender Parties.

     (c) When Administrative Agent collects or receives money that is allocable
to the Lender Parties, Administrative Agent shall distribute all money so
collected or received, and each Lender Party shall apply all such money so
distributed, as follows (except as otherwise provided in Section 8.3):

          (i) first, for the payment of all Obligations which are then due (and
     if such money is insufficient to pay all such Obligations, first to any
     reimbursements due Administrative Agent under Section 6.9 or 10.4 or
     similar section of any Security Documents and then to the partial payment
     of all other Obligations then due in proportion to the amounts thereof, or
     as Lender Parties shall otherwise agree);

          (ii) then for the prepayment of amounts owing under the Loan Documents
     (other than principal of the Loans) if so specified by Borrower;

          (iii) then for the prepayment of principal of the Loans, together with
     accrued and unpaid interest on the principal so prepaid; and

          (iv) last, for the payment or prepayment of any other Obligations.

All payments applied to principal or interest on any Note shall be applied first
to any interest then due and payable, then to principal then due and payable,
and last to any prepayment of principal and interest in compliance with Sections
2.6 and 2.7. All distributions of amounts described in any of subsections (ii),
(iii) or (iv) above shall be made by Administrative Agent pro rata to each
Lender Party then owed Obligations described in such subsection in proportion to
all amounts owed to all Lender Parties which are described in such subsection;
provided that if any Lender then owes payments to LC Issuer for the purchase of
a participation under Section 2.13(c) or to Administrative Agent under Section
10.4(c), any amounts otherwise distributable under this section to such Lender
shall be deemed to belong to LC Issuer, or Administrative Agent, respectively,
to the extent of such unpaid payments, and Administrative

                                       43

<PAGE>

Agent shall apply such amounts to make such unpaid payments rather than
distribute such amounts to such Lender.

     Section 3.2. Increased Costs.

     (a) Increased Costs Generally. If any Change in Law shall:

          (i) impose, modify or deem applicable any reserve, special deposit,
     compulsory loan, insurance charge or similar requirement against assets of,
     deposits with or for the account of, or credit extended or participated in
     by, any Lender Party (except any reserve requirement reflected in the
     Adjusted Eurodollar Rate);

          (ii) subject any Lender Party to any tax of any kind whatsoever with
     respect to this Agreement, any Letter of Credit, any participation in a
     Letter of Credit or any Eurodollar Loan made by it, or change the basis of
     taxation of payments to such Lender Party in respect thereof (except for
     Indemnified Taxes or Other Taxes covered by Section 3.5 and the imposition
     of, or any change in the rate of, any Excluded Tax payable by such Lender
     Party); or

          (iii) impose on any Lender Party or the London interbank market any
     other condition, cost or expense affecting this Agreement or Eurodollar
     Loans made by such Lender or any Letter of Credit or participation therein;

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 increase the cost to such Lender or LC
Issuer of participating in, issuing or maintaining any Letter of Credit (or of
maintaining its obligation to participate in or to issue any Letter of Credit),
or to reduce the amount of any sum received or receivable by such Lender Party
hereunder (whether of principal, interest or any other amount) then, upon
request of such Lender or LC Issuer, Borrower will pay to such Lender Party, as
the case may be, such additional amount or amounts as will compensate such
Lender Party, as the case may be, for such additional costs incurred or
reduction suffered.

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

     (c) Certificates for Reimbursement. A certificate of a Lender Party setting
forth in reasonable detail the computation of the amount or amounts necessary to
compensate such

                                       44

<PAGE>

Lender Party or its holding company, as the case may be, as specified in
paragraph (a) or (b) of this Section shall be delivered to Borrower and shall be
conclusive absent manifest error. Borrower shall pay such Lender Party, the
amount shown as due on any such certificate within 10 days after receipt
thereof.

     (d) Delay in Requests. Failure or delay on the part of any Lender Party to
demand compensation pursuant to this Section shall not constitute a waiver of
such Lender Party's right to demand such compensation.

     Section 3.3. Illegality. If any Change in Law shall make it unlawful for
any Lender Party to fund or maintain Eurodollar Loans, then, upon notice by such
Lender Party to Borrower and Administrative Agent, (a) Borrower's right to elect
Eurodollar Loans from such Lender Party shall be suspended to the extent and for
the duration of such illegality, (b) all Eurodollar Loans of such Lender Party
which are then the subject of any Borrowing Notice and which cannot be lawfully
funded shall be funded as Base Rate Loans of such Lender Party, and (c) all
Eurodollar Loans of such Lender Party shall be converted automatically to Base
Rate Loans on the respective last days of the then current Interest Periods with
respect to such Loans or within such earlier period as required by Law. If any
such conversion of a Eurodollar Loan occurs on a day which is not the last day
of the then current Interest Period with respect thereto, Borrower shall pay to
such Lender Party such amounts, if any, as may be required pursuant to Section
3.4.

     Section 3.4. Funding Losses. In addition to its other obligations
hereunder, Borrower will indemnify each Lender Party against, and reimburse each
Lender Party on demand for, any loss or expense incurred or sustained by such
Lender Party (including any loss or expense incurred by reason of the
liquidation or reemployment of deposits or other funds acquired by a Lender
Party to fund or maintain Eurodollar Loans), as a result of (a) any payment or
prepayment (whether authorized or required hereunder or otherwise) of all or a
portion of a Eurodollar Loan on a day other than the day on which the applicable
Interest Period ends, (b) any payment or prepayment, whether required hereunder
or otherwise, of a Loan made after the delivery, but before the effective date,
of a Continuation/Conversion Notice requesting the continuation of outstanding
Eurodollar Loans as, or the conversion of outstanding Base Rate Loans to,
Eurodollar Loans, if such payment or prepayment prevents such Continuation/
Conversion Notice from becoming fully effective, (c) the failure of any Loan to
be made or of any Continuation/Conversion Notice requesting the continuation of
outstanding Eurodollar Loans as, or the conversion of outstanding Base Rate
Loans to, Eurodollar Loans to become effective due to any condition precedent
not being satisfied or due to any other action or inaction of any Credit Party,
(d) any Conversion (whether authorized or required hereunder or otherwise) of
all or any portion of any Eurodollar Loan into a Base Rate Loan or into a
different Eurodollar Loan on a day other than the day on which the applicable
Interest Period ends, or (e) any assignment of a Eurodollar Loan on a day other
than the last day of the Interest Period therefor as a result of a request by
Borrower pursuant to Section 3.7(b). Such indemnification shall be on an
after-tax basis.

     Section 3.5. Taxes.

     (a) Payments Free of Taxes. Any and all payments by or on account of any
obligation of Borrower hereunder or under any other Loan Document shall be made
free and

                                       45

<PAGE>

clear of and without reduction or withholding for any Indemnified Taxes or Other
Taxes, provided that if Borrower shall be required by applicable law to deduct
any Indemnified Taxes (including any 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) Administrative Agent, LC Issuer, 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) Borrower shall make such deductions and (iii)
Borrower shall timely pay the full amount deducted to the relevant Governmental
Authority in accordance with applicable law.

     (b) Payment of Other Taxes by the Borrower. Without limiting the provisions
of subsection (a) above, Borrower shall timely pay any Other Taxes to the
relevant Governmental Authority in accordance with applicable law.

     (c) Indemnification by the Borrower. Borrower shall indemnify each Lender
Party, within 10 days after demand therefor, for the full amount of any
Indemnified Taxes or Other Taxes which (i) arise from any payment made hereunder
or under any other Loan Document (including Indemnified Taxes or Other Taxes
imposed or asserted on or attributable to amounts payable under this Section)
and (ii) are paid by such Lender Party, 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 but net of any foreign tax
credit or the benefit of any deduction or other tax benefit determined in good
faith by such Lender Party to be attributable to the imposition of such
Indemnified Tax. A certificate as to the amount of such payment or liability
delivered in good faith to Borrower by a Lender Party (with a copy to
Administrative Agent), or by Administrative Agent on its own behalf or on behalf
of a Lender Party, shall be conclusive absent manifest error.

     (d) Evidence of Payments. As soon as practicable after any payment of
Indemnified Taxes or Other Taxes by Borrower to a Governmental Authority,
Borrower shall deliver to 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 Administrative Agent.

     (e) Status of Lenders. Any Foreign Lender that is entitled to an exemption
from or reduction of withholding tax under the law of the jurisdiction in which
Borrower is resident for tax purposes, or any treaty to which such jurisdiction
is a party, with respect to payments hereunder or under any other Loan Document
shall deliver to the Borrower (with a copy to Administrative Agent), at the time
or times prescribed by applicable law or reasonably requested by Borrower or
Administrative Agent, such properly completed and executed documentation
prescribed by applicable law as will permit such payments to be made without
withholding or at a reduced rate of withholding. In addition, any Lender, if
requested by Borrower or Administrative Agent, shall deliver such other
documentation prescribed by applicable law or reasonably requested by Borrower
or Administrative Agent as will enable Borrower or Administrative Agent to
determine whether or not such Lender is subject to backup withholding or
information reporting requirements.

                                       46

<PAGE>

     Without limiting the generality of the foregoing, in the event that
Borrower is resident for tax purposes in the United States of America, any
Foreign Lender shall deliver to Borrower and Administrative Agent (in such
number of copies as shall be requested by the recipient) on or prior to the date
on which such Foreign Lender becomes a Lender under this Agreement (and from
time to time thereafter upon the request of Borrower or Administrative Agent,
but only if such Foreign Lender is legally entitled to do so), whichever of the
following is applicable:

          (i) duly completed copies of Internal Revenue Service Form W-8BEN
     claiming eligibility for benefits of an income tax treaty to which the
     United States of America is a party,

          (ii) duly completed copies of Internal Revenue Service Form W-8ECI,

          (iii) in the case of a Foreign Lender claiming the benefits of the
     exemption for portfolio interest under section 881(c) of the Code, (x) a
     certificate to the effect that such Foreign Lender is not (A) a "bank"
     within the meaning of section 881(c)(3)(A) of the Code, (B) a "10 percent
     shareholder" of Borrower within the meaning of section 881(c)(3)(B) of the
     Code, or (C) a "controlled foreign corporation" described in section
     881(c)(3)(C) of the Code and (y) duly completed copies of Internal Revenue
     Service Form W-8BEN, or

          (iv) any other form prescribed by applicable law as a basis for
     claiming exemption from or a reduction in United States Federal withholding
     tax duly completed together with such supplementary documentation as may be
     prescribed by applicable law to permit the Borrower to determine the
     withholding or deduction required to be made.

     (f) Treatment of Certain Refunds. If any Lender Party determines that it
has received a refund of any Taxes or Other Taxes as to which it has been
indemnified by Borrower or with respect to which Borrower has paid additional
amounts pursuant to this Section, it shall pay to Borrower an amount equal to
such refund (but only to the extent of indemnity payments made, or additional
amounts paid, by Borrower under this Section with respect to the Taxes or Other
Taxes giving rise to such refund), net of all out-of-pocket expenses of such
Lender Party and without interest (other than any interest paid by the relevant
Governmental Authority with respect to such refund), provided that Borrower,
upon the request of such Lender Party, agrees to repay the amount paid over to
Borrower (plus any penalties, interest or other charges imposed by the relevant
Governmental Authority) to such Lender Party in the event Lender Party is
required to repay such refund to such Governmental Authority. This Agreement
shall not be construed to require any Lender Party to make available its tax
returns (or any other information relating to its taxes that it deems
confidential) to Borrower or any other Person, and each Lender Party shall make
its determination under this subsection in its sole discretion.

     Section 3.6. Alternative Rate of Interest. If prior to the commencement of
any Interest Period for a Borrowing of Eurodollar Loans:

     (a) Administrative Agent determines that adequate and reasonable means do
not exist for ascertaining the Eurodollar Rate for such Interest Period (any
such determination shall be conclusive absent manifest error); or

                                       47

<PAGE>

     (b) Administrative Agent is advised by Majority Lenders that the Eurodollar
Rate 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 Administrative Agent shall give notice thereof to Borrower and Lenders by
telephone or telecopy as promptly as practicable thereafter and, until
Administrative Agent notifies Borrower and Lenders that the circumstances giving
rise to such notice no longer exist, (i) any Continuation/Conversion Notice that
requests the conversion of any Borrowing to, or continuation of any Borrowing
as, a Borrowing of Eurodollar Loans shall be ineffective and shall be deemed a
request to continue such Borrowing as a Borrowing of Base Rate Loans and (ii) if
any Borrowing Notice requests a Borrowing of Eurodollar Loans, such Borrowing
shall be made as a Borrowing of Base Rate Loans. Upon receipt of such notice,
Borrower may revoke any pending request for a Borrowing of, conversion to or
continuation of Eurodollar Loans.

     Section 3.7. Mitigation Obligations; Replacement of Lenders.

     (a) Designation of a Different Lending Office. If any Lender requests
compensation under Section 3.2, or requires Borrower to pay any additional
amount or indemnification to any Lender or any Governmental Authority for the
account of any Lender pursuant to Section 3.5, 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 3.2 or 3.5, 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. Borrower hereby agrees to pay
all reasonable costs and expenses incurred by any Lender in connection with any
such designation or assignment.

     (b) Replacement of Lenders. If any Lender requests compensation under
Section 3.2, or if Borrower is required to pay any additional amount to any
Lender or any Governmental Authority for the account of any Lender pursuant to
Section 3.5, or if any Lender defaults in its obligation to fund Loans
hereunder, or if any Lender fails to consent to any Borrowing Base amount
proposed by the Administrative Agent, then 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, and consents required by, Section 10.5), all
of its interests, rights and obligations under this Agreement and the related
Loan Documents to an Eligible Assignee that shall assume such obligations (which
assignee may be another Lender, if a Lender accepts such assignment), provided
that:

          (i) Borrower shall have paid to Administrative Agent the assignment
     fee specified in Section 10.5;

          (ii) such Lender shall have received payment of an amount equal to the
     outstanding principal of its Loans and participations in Matured LC
     Obligations, accrued interest thereon, accrued fees and all other amounts
     payable to it hereunder and under the other Loan Documents (including any
     amounts under Section 3.4) from the assignee (to the

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     extent of such outstanding principal and accrued interest and fees) or
     Borrower (in the case of all other amounts);

          (iii) in the case of any such assignment resulting from a claim for
     compensation under Section 3.2 or payments required to be made pursuant to
     Section 3.5, such assignment will result in a reduction in such
     compensation or payments thereafter; and

          (iv) such assignment does not conflict with applicable law.

A Lender shall not be required to make any such assignment or 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.

     Section 3.8. Payments by Borrower; Presumptions by Administrative Agent.
Unless Administrative Agent shall have received notice from Borrower prior to
the date on which any payment is due to Administrative Agent for the account of
any Lender Party hereunder that Borrower will not make such payment,
Administrative Agent may assume that Borrower has made such payment on such date
in accordance herewith and may, in reliance upon such assumption, distribute to
such Lender Party as the case may be, the amount due. In such event, if Borrower
has not in fact made such payment, then each Lender Party agrees to repay to
Administrative Agent forthwith on demand the amount so distributed to such
Lender Party, 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
Administrative Agent, at the greater of the Federal Funds Rate and a rate
determined by Administrative Agent in accordance with banking industry rules on
interbank compensation.

                  ARTICLE IV - Conditions Precedent to Lending

     Section 4.1 Documents to be Delivered. No Lender has any obligation to make
its first Loan, and LC Issuer has no obligation to issue the first Letter of
Credit, unless Administrative Agent shall have received all of the following,
duly executed and delivered (as applicable) and in form, substance and date
satisfactory to Administrative Agent:

     (a) This Agreement and any other documents that Lenders are to execute in
connection herewith.

     (b) Each Note.

     (c) Each Guaranty and each Security Document listed in the Security
Schedule.

     (d) Certain certificates of Borrower including:

          (i) An "Omnibus Certificate" of Borrower, executed by the Secretary
     and of the Chairman of the Board or President of Borrower (or an equivalent
     representative of Borrower's managing member), which shall contain the
     names and signatures of the officers or representatives of Borrower
     authorized to execute Loan Documents and which

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<PAGE>

     shall certify to the truth, correctness and completeness of the following
     exhibits attached thereto: (1) a copy of resolutions duly adopted and in
     full force and effect at the time this Agreement is entered into,
     authorizing the execution of this Agreement and the other Loan Documents
     delivered or to be delivered in connection herewith and the consummation of
     the transactions contemplated herein and therein, (2) a copy of the charter
     documents of Borrower and all amendments thereto, certified by the
     appropriate official of Borrower's state of organization, and (3) a copy of
     any bylaws of Borrower; and

          (ii) A "Compliance Certificate" of Borrower, executed by the Chairman
     of the Board or President of Borrower (or an equivalent representative of
     Borrower's managing member) and of the chief financial officer of Borrower,
     of even date with such Loan or such Letter of Credit, in which such
     officers certify to the satisfaction of the conditions set out in
     subsections (a), (b) and (c) of Section 4.2.

     (e) Certificate (or certificates) of the due formation, valid existence and
good standing of Borrower in its state of organization, issued by the
appropriate authorities of such jurisdiction, and certificates of Borrower's
good standing and due qualification to do business, issued by appropriate
officials in any states in which Borrower owns property subject to Security
Documents.

     (f) Documents similar to those specified in subsections (d)(i) and (e) of
this section with respect to each Guarantor and the execution by it of its
guaranty of Borrower's Obligations.

     (g) A favorable opinion of DLA Piper Rudnick Gray Cary US LLP, counsel for
Credit Parties, in form and substance reasonably satisfactory to Administrative
Agent and such other opinions of special and local counsel as may be required by
Administrative Agent.

     (h) The Initial Financial Statements.

     (i) A certificate of Borrower, executed by the chief financial officer,
certifying the Initial Financial Statements delivered pursuant to clause (h)
above.

     (j) Certificates or binders evidencing Credit Parties' insurance in effect
on the date hereof.

     (k) A certificate of Borrower, executed by the chief executive officer or
chief financial officer of Borrower in form and detail acceptable to
Administrative Agent confirming the insurance that is in effect as of the date
hereof and certifying that such insurance is in compliance with the requirements
of this Agreement.

     (l) The Initial Engineering Report.

     (m) Title review in form, substance, and authorship satisfactory to
Administrative Agent, with respect to Borrower's oil and gas reserves
representing a percentage determined by Administrative Agent of the present
discounted value of Credit Parties' proven oil and gas reserves in connection
with the pre-closing due diligence.

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<PAGE>

     (n) UCC-1 search reports conducted in such jurisdictions and reflecting
such names as Administrative Agent shall request.

     (o) A certificate of each Credit Party either (A) attaching copies of all
consents, licenses and approvals required in connection with the execution,
delivery and performance by such Credit Party and the validity against such
Credit Party of the Loan Documents to which it is a party, and such consents,
licenses and approvals shall be in full force and effect, or (B) stating that no
such consents, licenses or approvals are so required.

     (p) Payment of all commitment, facility, agency and other fees required to
be paid to any Lender pursuant to any Loan Documents or any commitment agreement
heretofore entered into.

     (q) Evidence satisfactory to Administrative Agent that Borrower has
successfully novated the Required Existing Hedges to the satisfaction of
Administrative Agent.

     (r) Evidence satisfactory to Administrative Agent that Borrower, after
giving effect to all extensions of credit hereunder, shall have at least
$35,000,000 of Available Borrowing Base and either $15,000,000 of unrestricted
cash or an additional $15,000,000 of Available Borrowing Base.

     (s) All documents and instruments which Administrative Agent has then
reasonably requested, in addition to those described in this Section 4.1. All
such additional documents and instruments shall be reasonably satisfactory to
Administrative Agent in form, substance and date.

In addition to the foregoing, Borrower shall, prior to the making of the first
Loan (or using the proceeds thereof), have paid all fees, expenses and
disbursements required to be paid before the making of such first Loan,
including those fees described in Sections 2.5(c)(i) and 2.5(d) and the
estimated fees, expenses and disbursements of Thompson & Knight LLP, counsel for
Administrative Agent.

     Section 4.2. Additional Conditions Precedent. No Lender has any obligation
to make any Loan (including its first), and LC Issuer has no obligation to issue
any Letter of Credit (including its first), unless the following additional
conditions precedent have been satisfied:

     (a) All representations and warranties made by any Credit Party in any Loan
Document shall be true in all respects on and as of the date of such Loan or the
date of issuance of such Letter of Credit as if such representations and
warranties had been made as of the date of such Loan or the date of issuance of
such Letter of Credit, except to the extent that such representation or warranty
specifically refers to an earlier date, in which case it shall be true in all
respects on and as of such earlier date.

     (b) No Default shall exist at the date of such Loan or the date of issuance
of such Letter of Credit, both before and after giving effect to the making of
such Loan or the issuance of such Letter of Credit.

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<PAGE>

     (c) No Material Adverse Change shall have occurred, and no event or
circumstance shall have occurred that would reasonably be anticipated to cause a
Material Adverse Change, since the date of the Initial Financial Statements.

                   ARTICLE V - Representations and Warranties

     To confirm each Lender Party's understanding concerning Credit Parties and
Credit Parties' businesses, properties and obligations and to induce each Lender
Party to enter into this Agreement and to extend credit hereunder, Borrower
represents and warrants to each Lender Party that:

     Section 5.1. No Default. No event has occurred and is continuing which
constitutes a Default.

     Section 5.2. Organization and Good Standing. Each Credit Party is duly
organized, validly existing and in good standing under the Laws of its
jurisdiction of organization, having all powers required to carry on its
business and enter into and carry out the transactions contemplated hereby. Each
Credit Party is duly qualified, in good standing, and authorized to do business
in all jurisdictions within the United States wherein it owns Oil and Gas
Properties included in the most recent Engineering Report and in all other
jurisdictions where the character of the properties owned or held by it or the
nature of the business transacted by it makes such qualification necessary
except where the failure to be qualified in such other jurisdictions would not
reasonably be anticipated to cause a Material Adverse Change. Each Credit Party
has taken all actions and procedures customarily taken in order to enter, for
the purpose of conducting business or owning property, each jurisdiction outside
the United States wherein the character of the properties owned or held by it or
the nature of the business transacted by it makes such actions and procedures
desirable.

     Section 5.3. Authorization. Each Credit Party has duly taken all action
necessary to authorize the execution and delivery by it of the Loan Documents to
which it is a party and to authorize the consummation of the transactions
contemplated thereby and the performance of its obligations thereunder. Borrower
is duly authorized to borrow funds hereunder.

     Section 5.4. No Conflicts, Contravention or Consents; No Violation of
Rights. The execution and delivery by each Credit Party of the Loan Documents to
which each is a party, the performance by each of its obligations under such
Loan Documents, and the consummation of the transactions contemplated by the
various Loan Documents, do not and will not (a) conflict with or contravene any
provision of (i) any Law in any material respect, (ii) the organizational
documents of any Credit Party, or (iii) any material agreement, judgment,
license, order or permit applicable to or binding upon any Credit Party, (b)
result in the acceleration of any Indebtedness owed by any Credit Party, (c)
result in or require the creation of any Lien upon any assets or properties of
any Credit Party except as expressly contemplated or permitted in the Loan
Documents or (d) violate any rights of the public shareholders of NEGI. Except
as expressly contemplated in the Loan Documents no permit, consent, approval,
authorization or order of, and no notice to or filing with, any Governmental
Authority or third party is required in

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<PAGE>

connection with the execution, delivery or performance by any Credit Party of
any Loan Document or to consummate any transactions contemplated by the Loan
Documents.

     Section 5.5. Enforceable Obligations. This Agreement is, and the other Loan
Documents when duly executed and delivered by each party thereto will be, legal,
valid and binding obligations of each Credit Party which is a party hereto or
thereto, enforceable in accordance with their respective terms except as such
enforcement may be limited by bankruptcy, insolvency, moratorium, or similar
Laws of general application relating to the enforcement of creditors' rights and
subject to general principles of equity, regardless of whether considered in a
proceeding in equity or law.

     Section 5.6. Initial Financial Statements. Credit Parties have heretofore
delivered to each Lender true, correct and complete copies of the Initial
Financial Statements. The Initial Financial Statements fairly present in
accordance with GAAP the financial positions of the respective Persons reported
on therein at the respective dates thereof and the results of such Persons'
operations and such Persons' cash flows for the respective periods thereof,
subject in the case of unaudited interim statements to year-end audit
adjustments. Since the date of the unaudited quarterly Initial Financial
Statements of Borrower as and for the nine months ended September 30, 2005, no
Material Adverse Change has occurred, except as reflected in Section 5.6 of the
Disclosure Schedule. All financial statements provided hereunder have been
prepared in accordance with GAAP (other than with respect to their presentation
in consolidating form) except that unaudited quarterly financial statements do
not include footnotes in accordance therewith and are subject to year-end audit
adjustments.

     Section 5.7. Other Obligations and Restrictions. No Credit Party has any
outstanding Liabilities of any kind (including contingent obligations, tax
assessments, and unusual forward or long-term commitments) which are, in the
aggregate, material to the Credit Parties, taken as a whole, or material with
respect to Borrower's Consolidated financial condition and not reflected in the
Initial Financial Statements or disclosed in Section 5.7 of the Disclosure
Schedule or otherwise permitted under Section 7.1 and except in the case of any
tax assessment that is being contested by a Credit Party in good faith and for
which adequate reserves have been established. Except as reflected in the
Initial Financial Statements or disclosed in Section 5.7 of the Disclosure
Schedule, no Credit Party is subject to or restricted by any franchise,
contract, deed, charter restriction, or other instrument or restriction which
would reasonably be anticipated to cause a Material Adverse Change.

     Section 5.8. Full Disclosure. No certificate, statement or other
information delivered herewith or heretofore by any Credit Party to any Lender
(as modified or supplemented by other information so furnished) in connection
with the negotiation of this Agreement or in connection with any transaction
contemplated hereby contains, as of the date made or deemed made, any material
misstatement of fact or omits to state any material fact necessary to make the
statements contained herein or therein, taken as a whole, not misleading. The
data provided by Borrower to the engineers who prepared each Engineering Report
was not false or misleading and Borrower did not fail to provide any material
data available to Borrower that would have been useful or necessary for
preparation of any such Engineering Report. Borrower has heretofore delivered to
each Lender true, correct and complete copies of the Initial Engineering Report.

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<PAGE>

     Section 5.9. Litigation. Except as disclosed in the Initial Financial
Statements or in Section 5.9 of the Disclosure Schedule: (a) there are no
actions, suits or legal, equitable, arbitrative or administrative proceedings
pending, or to the knowledge of any Credit Party threatened in writing, against
any Credit Party or affecting any Collateral of such Credit Party (including any
which challenge or otherwise pertain to any Credit Party's title to any
Collateral) before any Governmental Authority which would reasonably be
anticipated to cause a Material Adverse Change, and (b) there are no outstanding
judgments, injunctions, writs, rulings or orders by any such Governmental
Authority against any Credit Party or to each Credit Party's knowledge any
Credit Party's stockholders, partners, members, directors or officers or
affecting any Collateral or any of its material assets or property which would
reasonably be anticipated to cause a Material Adverse Change.

     Section 5.10. Labor Disputes and Acts of God. Except as disclosed in
Section 5.10 of the Disclosure Schedule, neither the business nor the properties
of any Credit Party has been affected by any fire, explosion, accident, strike,
lockout or other labor dispute, drought, storm, hail, earthquake, embargo, act
of God or of the public enemy or other casualty (whether or not covered by
insurance), which would reasonably be anticipated to cause a Material Adverse
Change.

     Section 5.11. ERISA Plans and Liabilities. All currently existing ERISA
Plans, if any, that are maintained for the benefit of the employees of Borrower,
any of Borrower's Subsidiaries or IPO Co are listed in Section 5.11 of the
Disclosure Schedule. Except as disclosed in the Initial Financial Statements or
in Section 5.11 of the Disclosure Schedule, no Termination Event has occurred
and all ERISA Plans maintained for the benefit of the employees of Borrower, any
of Borrower's Subsidiaries or IPO Co are in compliance with ERISA in all
material respects.

     Section 5.12. Environmental and Other Laws. Except as disclosed in Section
5.12 of the Disclosure Schedule: (a) Credit Parties are conducting their
businesses in material compliance with all applicable Laws, including
Environmental Laws, and have and are in material compliance with all licenses
and permits required under any such Laws; (b) none of the operations or
properties of any Credit Party is the subject of federal, state or local
investigation evaluating whether any material remedial action is needed to
respond to a release of any Hazardous Materials into the environment or to the
improper storage or disposal (including storage or disposal at offsite
locations) of any Hazardous Materials; (c) no Credit Party (and to the best
knowledge of Borrower, no other Person) has filed any notice under any Law
indicating that any Credit Party is responsible for the improper release into
the environment, or the improper storage or disposal, of any material amount of
any Hazardous Materials or that any Hazardous Materials have been improperly
released, or are improperly stored or disposed of, upon any property of any
Credit Party; (d) no Credit Party has transported or arranged for the
transportation of any Hazardous Material to any location which is (i) listed on
the National Priorities List under the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, as amended, listed for possible
inclusion on such National Priorities List by the Environmental Protection
Agency in its Comprehensive Environmental Response, Compensation and Liability
Information System List, or listed on any similar state list or (ii) the subject
of federal, state or local enforcement actions or other investigations which may
lead to claims against any Credit Party for clean-up costs, remedial work,
damages to natural resources or for personal injury claims (whether under
Environmental Laws or otherwise); and (e) no Credit

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Party otherwise has any known material contingent liability under any
Environmental Laws or in connection with the release into the environment, or
the storage or disposal, of any Hazardous Materials. Each Credit Party
undertook, at the time of its acquisition of each of its material properties, a
reasonable investigation into the previous ownership and uses of the Property
and any potential environmental liabilities associated therewith.

     Section 5.13. Names and Places of Business. No Credit Party has, during the
preceding five years, had, been known by, or used any other trade or fictitious
name or been organized in any jurisdiction, except as disclosed in Section 5.13
of the Disclosure Schedule.

     Section 5.14. Subsidiaries. Borrower does not presently have any Subsidiary
except those listed in Section 5.14 of the Disclosure Schedule or disclosed to
Administrative Agent in writing. No Credit Party has any equity investments in
any other Person except those listed in Section 5.14 of the Disclosure Schedule
or disclosed to Administrative Agent in writing. Borrower owns, directly or
indirectly, the Equity in each of its Subsidiaries as indicated in Section 5.14
of the Disclosure Schedule or has been disclosed to Administrative Agent in
writing. Except as listed on the Disclosure Schedule, no Subsidiary of Borrower
owns Oil and Gas Properties on the date hereof other than NEGO, National
Offshore, and National Onshore. None of NGX Energy, NGX GP or NGX LP have any
assets or liabilities except those listed in Section 5.14 of the Disclosure
Schedule.

     Section 5.15. Government Regulation. Neither Borrower nor any other Credit
Party owing Obligations is (a) an "investment company" or a company "controlled"
by an "investment company" within the meaning of the Investment Company Act of
1940, as amended, or (b) subject to regulation under the Federal Power Act, as
amended, or any other Law which regulates the incurring by such Person of
Indebtedness, including Laws relating to common contract carriers or the sale of
electricity, gas, steam, water or other public utility services.

     Section 5.16. Solvency. Immediately after giving effect to the issuance of
the Notes, the execution of the Loan Documents by Borrower and each Guarantor
and the consummation of the transactions contemplated hereby, Borrower and each
Guarantor will be solvent (as such term is used in applicable bankruptcy,
liquidation, receivership, insolvency or similar Laws), and the sum of
Borrower's and each Guarantor's absolute and contingent liabilities, including
the Obligations or guarantees thereof, shall not exceed the fair market value of
such Person's assets, and (ii) Borrower's and each Guarantor's capital should be
adequate for the businesses in which such Person is engaged and intends to be
engaged. Neither Borrower nor any Guarantor has incurred (whether under the Loan
Documents or otherwise), nor does Borrower or any Guarantor intend to incur or
believe that it will incur, liabilities that will be beyond its ability to pay
as such debts mature.

     Section 5.17. Title to Properties; Licenses. Each Credit Party has good and
defensible title to, or valid leasehold interests in, all of the Collateral
owned or leased by such Credit Party and all of its other material properties
and assets necessary or used in the ordinary conduct of its business, free and
clear of all Liens, encumbrances, or adverse claims and of all impediments to
the use of such properties and assets in such Credit Party's business other than
Permitted Liens and other minor defects or irregularities in title that do not
interfere in any material respect with the operation thereof, except that no
representation or warranty is made with respect to any oil,

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gas or mineral property or interest to which no proved oil or gas reserves are
properly attributed. On the date hereof, each Credit Party owns the net
interests in production attributable to the wells and units evaluated in the
Initial Engineering Report. The ownership of such Properties does not in the
aggregate in any material respect obligate such Credit Party to bear the costs
and expenses relating to the maintenance, development and operations of such
Properties in an amount materially in excess of the working interest of such
Properties set forth in the Initial Engineering Reports. Upon delivery of each
Engineering Report furnished to the Lenders pursuant to Sections 6.2(f) and (g),
the statements made in the preceding sentences of this section and in Section
5.19 shall be true with respect to such Engineering Report. Each Credit Party
possesses all licenses, permits, franchises, patents, copyrights, trademarks and
trade names, and other intellectual property (or otherwise possesses the right
to use such intellectual property without violation of the rights of any other
Person) which are necessary to carry out its business as presently conducted and
as presently proposed to be conducted hereafter, except where the failure to
possess such licenses would not be reasonably anticipated to cause a Material
Adverse Change and no Credit Party is in violation in any material respect of
the terms under which it possesses such intellectual property or the right to
use such intellectual property.

     Section 5.18. Use of Proceeds; Margin Stock. The Letters of Credit and
proceeds of the Loans will be used solely for the purposes specified in Section
2.4. None of such proceeds will be used by any Credit Party, directly or
indirectly, for the purpose of purchasing or carrying any "margin stock" as
defined in Regulations T, U or X, or for the purpose of reducing or retiring any
Indebtedness which was originally incurred to purchase or carry a "margin stock"
or for any other purpose which might constitute this transaction a "purpose
credit" within the meaning of Regulations T, U or X. Borrower has not taken nor
will Borrower take any action which might cause any of the Loan Documents to
violate Regulations T, U or X, or any other regulations of the Board of
Governors of the Federal Reserve System or to violate Section 8 of the
Securities Exchange Act of 1934 or any rule or regulation thereunder, in each
case as now in effect or as the same may be in effect at the time such proceeds
are used.

     Section 5.19. Leases and Contracts; Performance of Obligations. The leases,
contracts, servitudes and other agreements forming a part of the Engineered Oil
and Gas Properties of the Credit Parties are in full force and effect. All
rents, royalties and other payments due and payable under such leases,
contracts, servitudes and other agreements, or under any Permitted Liens, or
otherwise attendant to the ownership or operation of any Engineered Oil and Gas
Properties, have been properly and timely paid where such failure to pay could
materially and adversely affect the ownership or operation of any material
Engineered Oil and Gas Property. No Credit Party is in default with respect to
its obligations (and no Credit Party is aware of any default by any third party
with respect to such third party's obligations) under any such leases,
contracts, servitudes and other agreements, or under any Permitted Liens, or
otherwise attendant to the ownership or operation of any part of the Engineered
Oil and Gas Properties, where such default could materially and adversely affect
the ownership or operation of any material Engineered Oil and Gas Property. No
Credit Party is currently accounting for any royalties, or overriding royalties
or other payments out of production, based on oil and gas prices other than the
prices actually received by such Credit Party (calculated at the well) from sale
of production, and no Credit Party has any liability (or alleged liability) to
account for the same on any such other basis.

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     Section 5.20. Sale of Production. Except as set forth in Section 5.20 of
the Disclosure Schedule, no Engineered Oil and Gas Property is subject to any
material contractual or other arrangement (i) whereby payment for production is
or can be deferred for a substantial period after the month in which such
production is delivered (in the case of oil, not in excess of 60 days, and in
the case of gas, not in excess of 90 days) or (ii) whereby payments are made to
a Credit Party other than by checks, drafts, wire transfer advises or other
similar writings, instruments or communications for the immediate payment of
money. Except for production sales contracts, processing agreements,
transportation agreements and other agreements relating to the marketing of
production that are listed in Section 5.20 of the Disclosure Schedule in
connection with the Engineered Oil and Gas Properties to which such contract or
agreement relates: (i) no Engineered Oil and Gas Property is subject to any
material contractual or other arrangement for the sale, processing or
transportation of production (or otherwise related to the marketing of
production) which cannot be canceled on 120 days' (or less) notice and (ii) all
material contractual or other arrangements for the sale, processing or
transportation of production (or otherwise related to the marketing of
production) are bona fide arm's length transactions made with third parties not
affiliated with Credit Parties. Each Credit Party is presently receiving a price
for all production from (or attributable to) each Engineered Oil and Gas
Property covered by a production sales contract or marketing contract listed on
the Disclosure Schedule that is computed in accordance with the terms of such
contract, and no Credit Party is having deliveries of production from such
Engineered Oil and Gas Property curtailed substantially below such property's
delivery capacity, except for curtailments caused (a) by an act or event of
force majeure, or (b) by routine maintenance requirements in the ordinary course
of business. Except as set forth in the Disclosure Schedule, no Credit Party,
nor, to such Credit Party's knowledge, any Credit Party's predecessors in title,
has received prepayments (including payments for gas not taken pursuant to "take
or pay" or other similar arrangements) for any oil, gas or other hydrocarbons
produced or to be produced from any Engineered Oil and Gas Properties after the
date hereof. Except as set forth in the Disclosure Schedule, no Engineered Oil
and Gas Property is subject to any "take or pay" or other similar arrangement
(i) which can be satisfied in whole or in part by the production or
transportation of gas from other properties or (ii) as a result of which
production from any Engineered Oil and Gas Property may be required to be
delivered to one or more third parties without payment (or without full payment)
therefor as a result of payments made, or other actions taken, with respect to
other properties. Except as set forth in the Disclosure Schedule, there is no
Engineered Oil and Gas Property with respect to which any Credit Party, or, to
such Credit Party's knowledge, any Credit Party's predecessors in title, has,
prior to the date hereof, taken more ("overproduced"), or less
("underproduced"), in any material respect, gas from the lands covered thereby
(or pooled or unitized therewith) than its ownership interest in such Engineered
Oil and Gas Property would entitle it to take; and the Disclosure Schedule
accurately reflects, in all material respects, for each well or unit with
respect to which such an imbalance is shown thereon to exist, (i) whether such
Credit Party is overproduced or underproduced and (ii) the volumes (in cubic
feet or British thermal units) of such overproduction or underproduction and the
effective date of such information. Except as set forth in the Disclosure
Schedule, no Engineered Oil and Gas Property is subject to a gas balancing
arrangement under which one or more third parties may take a portion of the
production attributable to such Engineered Oil and Gas Property without payment
(or without full payment) therefor as a result of production having been taken
from, or as a result of other actions or inactions with respect to, other
properties. No Engineered Oil and Gas Property is

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subject at the present time to any regulatory refund obligation and, to such
Credit Party's knowledge, no facts exist which might cause the same to be
imposed.

     Section 5.21. Operation of Oil and Gas Properties. Except as disclosed in
Section 5.12 of the Disclosure Schedule, the Engineered Oil and Gas Properties
(and all properties unitized therewith) are, in all material respects, being
(and, to the extent the same could materially and adversely affect the ownership
or operation of the Engineered Oil and Gas Properties after the date hereof, to
the applicable Credit Party's knowledge, have in the past been) maintained,
operated and developed in a good and workmanlike manner, in accordance with
prudent industry standards and in conformity with all applicable Laws and in
conformity with all oil, gas or other mineral leases and other contracts and
agreements forming a part of the Engineered Oil and Gas Property and in
conformity with the Permitted Liens. No Engineered Oil and Gas Property is
subject to having allowable production after the date hereof reduced below the
full and regular allowable (including the maximum permissible tolerance) because
of any overproduction (whether or not the same was permissible at the time)
prior to the date hereof and (ii) none of the wells located on the Engineered
Oil and Gas Properties (or properties unitized therewith) are or will be
deviated from the vertical more than the maximum permitted by applicable laws,
regulations, rules and orders, and such wells are bottomed under and producing
from, with the well bores wholly within, the Engineered Oil and Gas Properties
(or, in the case of wells located on properties unitized therewith, such
unitized properties). There are no dry holes, or otherwise inactive wells,
located on the Engineered Oil and Gas Properties or on lands pooled or unitized
therewith, except for wells that have been properly plugged and abandoned. Each
Credit Party has all material governmental licenses and permits reasonably
necessary or appropriate to own and operate its Engineered Oil and Gas
Properties, and except as disclosed in Section 5.12 of the Disclosure Schedule
no Credit Party has received notice in writing of any material violations in
respect of any such licenses or permits.

     Section 5.22. Ad Valorem and Severance Taxes; Litigation. Each Credit Party
has paid and discharged when due all ad valorem taxes assessed against its
Engineered Oil and Gas Properties or any part thereof and all production,
severance and other taxes assessed against, or measured by, the production or
the value, or proceeds, of the production therefrom, except in the case of any
tax assessment that is being contested by such Credit Party in good faith and
for which adequate reserves have been established. There are no suits, actions,
claims, investigations, inquiries, proceedings or demands pending (or, to any
Credit Party's knowledge, threatened) which might adversely affect any material
Engineered Oil and Gas Property, including any which challenge or otherwise
pertain to any Credit Party's title to any material Engineered Oil and Gas
Property or rights to produce and sell oil and gas therefrom.

     Section 5.23. Internal Control Event. Since the date of the annual Initial
Financial Statements, no Internal Control Event has occurred which would be
reasonably anticipated to cause a Material Adverse Change.

     Section 5.24. Separateness of Each Credit Party. Each Credit Party: (a)
maintains separate records and books of account that are distinct from those of
any Affiliate of such Credit Party, appropriately identifying such Credit
Party's separate assets and liabilities, and in such records and books of
account properly documents all inter-Affiliate transactions; (b) except for
treasury management systems in which ownership of deposits and investments are
separately

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accounted for, does not commingle its funds or assets with those of any
Affiliate of such Credit Party; (c) holds all appropriate meetings of its board
of directors or other analogous governing body to authorize and approve such
Credit Party's actions, which meetings are separate from those of other
Affiliates and at which meetings all appropriate officers are elected or
appointed to offices that are separate from those of Affiliates; and (d) does
not hold itself out as directly owning the assets of its Affiliates and does not
allow any Affiliate to hold itself out as directly owning the assets of such
Credit Party. Pursuant to the Securities Exchange Act, NEGI presents its
Consolidated financial condition of NEGI and its Subsidiaries to the public
separately from that of Borrower and Borrower's other Subsidiaries. Borrower
acknowledges and agrees that the Lender Parties have relied on the separate
existence of each Credit Party, as represented to them by Borrower, in agreeing
on the structure of the credit transactions contemplated by this Agreement and
in making the Loans based on the support of the various Guaranties and other
Security Documents provided by the various Credit Parties as separate and
distinct entities.

                 ARTICLE VI - Affirmative Covenants of Borrower

     To conform with the terms and conditions under which each Lender Party is
willing to have credit outstanding to Borrower, and to induce each Lender Party
to enter into this Agreement and extend credit hereunder, Borrower covenants and
agrees that until the full and final payment of the Obligations and the
termination of this Agreement, unless Majority Lenders have previously agreed
otherwise:

     Section 6.1. Payment and Performance. Each Credit Party will pay all
amounts due under the Loan Documents, to which it is a party, in accordance with
the terms thereof and will observe, perform and comply with every covenant, term
and condition set forth in the Loan Documents to which it is a party. Borrower
will cause each Credit Party that is a wholly-owned Subsidiary of Borrower to
observe, perform and comply with every such term, covenant and condition in any
Loan Document. The parties recognize that Borrower may not have the legal power
to cause any Credit Parties other than Borrower and its wholly-owned
Subsidiaries so to comply with the Loan Documents, but Borrower agrees that the
failure of any such other Credit Party to comply with the terms of the Loan
Documents will nonetheless constitute a Default or Event of Default hereunder.

     Section 6.2. Books, Financial Statements and Reports. Each Credit Party
will at all times maintain full and accurate books of account and records.
Borrower and each Credit Party that is a Subsidiary of Borrower will maintain a
standard system of accounting, will maintain its Fiscal Year, and will furnish
the following statements and reports to the Administrative Agent at Borrower's
expense:

     (a) As soon as available, and in any event within ninety (90) days after
the end of each Fiscal Year, complete Consolidated and consolidating financial
statements of Borrower together with all notes thereto, prepared in reasonable
detail in accordance with GAAP, together with an opinion with respect to such
Consolidated statements (without a "going concern" or like qualification or
exception or without any qualification or exception as to the scope of such
audit), based on an audit using generally accepted auditing standards, by Grant
Thornton or another

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independent certified public accounting firm selected by Borrower and reasonably
acceptable to Administrative Agent, to the effect that such Consolidated
financial statements present fairly in all material respects the financial
condition and results of operations of Borrower and its consolidated
subsidiaries on a consolidated basis in accordance with GAAP consistently
applied. These financial statements shall contain a Consolidated and
consolidating balance sheet as of the end of such Fiscal Year and Consolidated
and consolidating statements of earnings, of cash flows, and of changes in
owners' equity for such Fiscal Year, each setting forth in comparative form the
corresponding figures for the preceding Fiscal Year. In addition, after the
Initial Equity Offering, to the extent required by the Securities Laws,
concurrently with the delivery of such financial statements, IPO Co will furnish
an attestation report of an independent certified public accounting firm as to
IPO Co's internal controls pursuant to Section 404 of Sarbanes-Oxley and no
conclusion made by such firm shall identify a material weakness as to which the
Majority Lenders object.

     (b) As soon as available, and in any event within forty-five (45) days
after the end of the first three Fiscal Quarters in each Fiscal Year, Borrower's
Consolidated and consolidating balance sheet as of the end of such Fiscal
Quarter and Consolidated and consolidating statements of Borrower's earnings and
cash flows for the period from the beginning of the then current Fiscal Year to
the end of such Fiscal Quarter, all in reasonable detail and prepared in
accordance with GAAP, subject to changes resulting from normal year-end
adjustments and that not all notes required by GAAP need be presented. In
addition Borrower will, together with each such set of financial statements and
each set of financial statements furnished under subsection (a) of this section,
furnish a certificate of Borrower in the form of Exhibit D signed by the chief
financial officer of Borrower stating that such financial statements present
fairly in all material respects the consolidated financial condition and results
of operations of Borrower and its consolidated subsidiaries (subject to normal
year-end adjustments and the absence of notes with respect to the financial
statements furnished pursuant to this subsection (b)), stating that he has
reviewed the Loan Documents, containing calculations showing compliance (or
non-compliance) at the end of such Fiscal Quarter with the requirements of
Sections 7.1, 7.3, 7.6 and 7.11 and stating that all Collateral required under
Section 6.17 has been provided and that no Default or Internal Control Event
exists at the end of such Fiscal Quarter or at the time of such certificate or
specifying the nature and period of existence of any such Default or Internal
Control Event.

     (c) Promptly upon their becoming available, copies of all financial
statements, reports, notices and proxy statements sent by any Credit Party to
its equity holders and all registration statements, periodic reports and other
statements and schedules filed by any Credit Party with any securities exchange,
the Securities and Exchange Commission or any similar governmental authority.

     (d) Together with each set of financial statements furnished under
subsections (a) and (b) of this section, Borrower will furnish a report (in form
reasonably satisfactory to Administrative Agent) of all Hedging Contracts of
Borrower and each of its Subsidiaries, setting forth the type, term, effective
date, termination date and notional amounts or volumes and the counterparty to
each such agreement.

     (e) As soon as available, and in any event within ninety (90) days after
the end of each Fiscal Year, a business and financial plan, together with a
capital expenditure schedule, for

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Borrower (in form reasonably satisfactory to Administrative Agent), prepared by
a senior financial officer thereof, setting forth for the first year thereof,
quarterly financial projections and budgets for Borrower, and thereafter yearly
financial projections and budgets until the Maturity Date.

     (f) By March 31 of each year commencing March 31, 2006, an Engineering
Report prepared as of the preceding January 1 by one or more of Netherland,
Sewell & Associates, DeGolyer & MacNaughton, or other independent petroleum
engineers chosen by Borrower and acceptable to Administrative Agent, concerning
all Oil and Gas Properties owned by any Credit Party which are located in or
offshore of the United States and which have attributable to them proved oil or
gas reserves. This report shall be reasonably satisfactory to Administrative
Agent, shall be prepared using PV10 Pricing, shall take into account any
"over-produced" status under gas balancing arrangements, and shall contain
information and analysis consistent in form and scope in all material respects
to that contained in the Initial Engineering Report. This report shall
distinguish (or shall be delivered together with a certificate from an
appropriate officer of Borrower which distinguishes) (i) the Oil and Gas
Properties owned by each Credit Party and (ii) those properties treated in the
report which are Collateral from those properties treated in the report which
are not Collateral.

     (g) By September 30 of each year, commencing September 30, 2006, an
Engineering Report prepared as of the preceding July 1 (or the last day of the
preceding calendar month in the case of a Special Determination) by petroleum
engineers who are employees of Borrower (or, at the option of Borrower, by the
independent engineers named above or selected in accordance with (f) above),
together with an accompanying report on property sales, property purchases and
changes in categories that have occurred since the date of the prior Engineering
Report, both in the same form and scope as the reports in (f) above.

     (h) As soon as available, and in any event within forty-five (45) days
after the end of each calendar quarter, a report describing by major operating
unit the net volume of production of the Credit Parties and sales attributable
to production during each month of such quarter from the properties described in
the most recent Engineering Report and describing the related severance taxes,
other taxes, leasehold operating expenses and capital costs attributable thereto
and incurred during such month.

     (i) At least ten Business Days prior to any sale or transfer of Oil and Gas
Properties for more than $50,000,000 or that will require execution of a release
of Collateral by Administrative Agent, written notice of such sale describing
the Oil and Gas Properties to be sold, the anticipated sales price, and a
request for the release of any such Collateral.

     Section 6.3. Other Information and Inspections. Each Credit Party will
furnish to each Lender any information which Administrative Agent may from time
to time request concerning any provision of the Loan Documents, any Collateral,
or any matter in connection with Credit Parties' businesses, properties,
prospects, financial condition and operations, including all evidence which
Administrative Agent from time to time reasonably requests as to the accuracy
and validity of or compliance with all representations, warranties and covenants
made by any Credit Party in the Loan Documents, the satisfaction of all
conditions contained therein, and all other matters pertaining thereto. Borrower
and each Credit Party will permit representatives

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appointed by Administrative Agent or any Lender (including independent
accountants, auditors, agents, attorneys, appraisers and any other Persons) upon
reasonable prior written notice to visit and inspect during normal business
hours any of such Credit Party's property, including its books of account, other
books and records, and any facilities or other business assets, and to make
extra copies therefrom and photocopies and photographs thereof, and to write
down and record any information such representatives obtain, and each Credit
Party shall permit Administrative Agent or its representatives to investigate
and verify the accuracy of the information furnished to Administrative Agent or
any Lender in connection with the Loan Documents and, upon reasonable prior
written notice, to discuss all such matters with its principal executive and
financial officers.

     Section 6.4. Notice of Material Events and Change of Name or Address.
Borrower will promptly notify each Lender Party in writing, stating that such
notice is being given pursuant to this Agreement, of:

     (a) the occurrence of any Material Adverse Change,

     (b) the occurrence of any Default,

     (c) the acceleration of the maturity of any Indebtedness owed by any Credit
Party or of any default by any Credit Party under any indenture, mortgage,
agreement, contract or other instrument to which any of them is a party or by
which any of them or any of their properties is bound, if such acceleration or
default would be reasonably anticipated to cause a Material Adverse Change,

     (d) the occurrence of any Termination Event,

     (e) any claim of $5,000,000 or more, or any notice of potential liability
under any Environmental Laws which might exceed such amount, and

     (f) the filing of any suit or proceeding against any Credit Party in which
an adverse decision would reasonably be anticipated to cause a Material Adverse
Change or to materially and adversely affect title to any material Engineered
Oil and Gas Property of Borrower or any Subsidiary.

Upon the occurrence of any of the foregoing Credit Parties will take all
necessary or appropriate steps to remedy promptly any such Material Adverse
Change, Default, acceleration, default, or Termination Event, to protect against
any such adverse claim, to defend any such suit or proceeding, and to resolve
all controversies on account of any of the foregoing. Borrower will also notify
Administrative Agent and Administrative Agent's counsel in writing at least
twenty Business Days prior to the date that any Credit Party changes its name or
its jurisdiction of organization.

     Section 6.5. Maintenance of Properties. Each Credit Party will maintain,
preserve, protect, and keep all Collateral and all other property owned by such
Person that is used or useful in the conduct of its business in good condition
(ordinary wear and tear excepted) in accordance with prudent industry standards,
in material compliance with all applicable Laws, and in conformity with all
applicable material contracts, servitudes, leases and agreements, and each

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will from time to time make all repairs, renewals and replacements needed to
enable the business and operations carried on in connection therewith to be
promptly and advantageously conducted at all times.

     Section 6.6. Maintenance of Existence and Qualifications. Each Credit Party
will maintain and preserve its existence and its rights and franchises in full
force and effect and will qualify to do business in all states or jurisdictions
where required by applicable Law, except (a) as contemplated in the above
definition of "Initial Equity Offering" or (b) where the failure to do any of
the foregoing would not be reasonably anticipated to cause a Material Adverse
Change.

     Section 6.7. Payment of Trade Liabilities, Taxes, etc. Each Credit Party
will (a) timely file all required tax returns including any extensions; (b)
timely pay all taxes, assessments, and other governmental charges or levies
imposed upon it or upon its income, profits or property before the same become
delinquent; (c) within ninety (90) days past the original invoice or billing
date therefor pay all Liabilities owed by it on ordinary trade terms to vendors,
suppliers and other Persons providing goods and services used by it in the
ordinary course of its business; (d) pay and discharge when due all other
Liabilities now or hereafter owed by it, other than royalty payments suspended
in the ordinary course of business; and (e) maintain appropriate accruals and
reserves for all of the foregoing in accordance with GAAP, provided that each
Credit Party may delay paying or discharging any of the foregoing so long as it
is in good faith contesting the validity thereof by appropriate proceedings, if
necessary, and has set aside on its books adequate reserves therefore which are
required by GAAP.

     Section 6.8. Insurance.

     (a) Each Credit Party shall at all times maintain (at its own expense)
insurance for its property in accordance with the Insurance Schedule with
financially sound and reputable insurance companies, as well as insurance in
such amounts, with such limitations or deductibles, against such risks, and in
such form as are customarily maintained by companies of established repute
engaged in the same or similar businesses operating in the same or similar
locations. All insurance policies covering Collateral shall be endorsed (i) to
provide for payment of losses to Administrative Agent as its interests may
appear, (ii) to provide that such policies may not be canceled or reduced or
affected in any material manner for any reason without ten (10) days prior
notice to Administrative Agent, and (iii) to provide for any other matters
specified in any applicable Security Document or which Administrative Agent may
reasonably require. Each Credit Party shall at all times maintain insurance
against its liability for injury to persons or property in accordance with the
Insurance Schedule, which insurance shall be by financially sound and reputable
insurers.

     (b) Reimbursement under any liability insurance maintained by Credit
Parties pursuant to this Section 6.8 may be paid directly to the Person who has
incurred the liability covered by such insurance. With respect to any loss
involving damage to Collateral, each Credit Party will make or cause to be made
the necessary repairs to or replacements of such Collateral, and any proceeds of
insurance maintained by each Credit Party pursuant to this Section 6.8 shall be
paid to such Credit Party by Administrative Agent as reimbursement for the costs
of such repairs or replacements as such repairs or replacements are made or
acquired; provided that

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Administrative Agent shall be entitled (but not obligated) to retain and apply
such proceeds as Collateral during the continuance of any Event of Default.

     Section 6.9. Performance on Borrower's Behalf. If any Credit Party fails to
pay when required any taxes, insurance premiums, expenses, attorneys' fees or
other amounts it is required to pay under any Loan Document, Administrative
Agent may pay the same. Borrower shall immediately reimburse Administrative
Agent for any such payments and each amount paid by Administrative Agent shall
constitute an Obligation owed hereunder which is due and payable on the date
such amount is paid by Administrative Agent.

     Section 6.10. Interest. In addition to Borrower's obligations to pay
interest at the Default Rate on the Loans under Section 2.5 and the Matured LC
Obligations under Section 2.12(a), Borrower hereby promises to each Lender Party
to pay interest at the Default Rate applicable to Base Rate Loans on all
Obligations (including Obligations to pay fees or to reimburse or indemnify any
Lender) that Borrower has in this Agreement promised to pay to such Lender Party
and which are not paid when due (and subject to the obligations of such Lender
to repay such interest if it is required to repay any such amount to Borrower).
Such interest shall accrue from the date such other Obligations become due until
they are paid.

     Section 6.11. Compliance with Agreements and Law. Each Credit Party will
perform all material obligations it is required to perform under the terms of
each indenture, mortgage, deed of trust, security agreement, lease, franchise,
agreement, contract or other instrument or obligation (other than the Loan
Documents) to which it is a party or by which it or any of its properties is
bound. Each Credit Party will conduct its business and affairs in compliance in
all material respects with all Laws applicable thereto. Each Credit Party will
cause all material licenses and permits for the conduct of its business and the
ownership and operation of its material Engineered Oil and Gas Properties used
and useful in the conduct of its business to be at all times maintained in good
standing and in full force and effect.

     Section 6.12. Environmental Matters; Environmental Reviews.

     (a) Each Credit Party will comply in all material respects with all
Environmental Laws now or hereafter applicable to such Credit Party, as well as
all contractual obligations and agreements with respect to environmental
remediation or other environmental matters, and shall obtain, at or prior to the
time required by applicable Environmental Laws, all environmental permits,
licenses and other authorizations reasonably necessary for its operations and
will maintain such authorizations in full force and effect. No Credit Party will
do anything or permit anything to be done which will subject any of its
properties to any material remedial obligations under, or result in
noncompliance in any material respect with applicable permits and licenses
issued under, any applicable Environmental Laws, assuming disclosure to the
applicable governmental authorities of all relevant facts, conditions and
circumstances. Upon Administrative Agent's reasonable request, at any time and
from time to time (but no more frequently than once per calendar year with
respect to the same property), Borrower will provide at its own expense an
environmental inspection of any of the Credit Parties' material real properties
and audit of their environmental compliance procedures and practices, in each
case from an engineering or consulting firm selected by Borrower and reasonably
approved by Administrative Agent.

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     (b) Borrower will promptly furnish to Administrative Agent copies of all
written notices of violation, orders, claims, citations, complaints, penalty
assessments, suits or other proceedings received by any Credit Party, or of
which Borrower otherwise has notice, pending or threatened in writing against
any Credit Party by any governmental authority with respect to any alleged
violation of or non-compliance with any Environmental Laws or any permits,
licenses or authorizations in connection with any Credit Party's ownership or
use of its properties or the operation of its business.

     (c) Borrower will promptly furnish to Administrative Agent all requests for
information, notices of claim, demand letters, and other notifications that are
received by Borrower in connection with any Credit Party's ownership or use of
its properties or the conduct of its business, relating to potential
responsibility with respect to any investigation or clean-up of Hazardous
Material at any location (excluding only routine correspondence concerning
matters in the ordinary course of business with respect to duties that the
Credit Parties are not disputing).

     Section 6.13. Actions after the Initial Equity Offering. If and when the
Initial Equity Offering occurs, Borrower will ensure that all of the terms of
the proviso in the above definition of "Initial Equity Offering" are met and
Borrower and NEGO will novate the then existing Hedging Contracts of NEGO so
that Borrower replaces NEGO as a party thereto (with the consent of each other
party thereto other than Citibank, N.A., who hereby gives such consent) and
amend and restate the Security Documents given by NEGO so that they (a) are in
substantially the same form as the Security Documents provided by National
Onshore and National Offshore and (b) secure the Obligations directly.

     Section 6.14. Bank Accounts; Offset. To secure the repayment of the
Obligations Borrower hereby grants to each Lender Party, and each of their
respective Affiliates, a security interest, a lien, and a right of offset, each
of which shall be in addition to all other interests, liens, and rights of any
Lender Party or any of their respective Affiliates, at common Law, under the
Loan Documents, or otherwise, and each of which shall be upon and against (a)
any and all moneys, securities or other property (and the proceeds therefrom) of
Borrower now or hereafter held or received by or in transit to any Lender Party
or any of their respective Affiliates, from or for the account of Borrower,
whether for safekeeping, custody, pledge, transmission, collection or otherwise,
(b) any and all deposits (general or special, time or demand, provisional or
final) of Borrower with any Lender Party, or any of their respective Affiliates,
and (c) any other credits and claims of Borrower at any time existing against
any Lender Party, including claims under certificates of deposit. At any time
and from time to time after the occurrence of any Event of Default, each Lender
Party, and each of their respective Affiliates, is hereby authorized to
foreclose upon, or to offset against the Obligations then due and payable (in
either case without notice to Borrower), any and all items hereinabove referred
to; irrespective of whether or not such Lender Party or Affiliate shall have
made any demand under this Agreement or any other Loan Document and although
such obligations of the Borrower may be contingent or unmatured or are owed to a
branch or office of such Lender Party different from the branch or office
holding such items. The remedies of foreclosure and offset are separate and
cumulative, and either may be exercised independently of the other without
regard to procedures or restrictions applicable to the other.

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     Section 6.15. Guaranties. Each of the Subsidiaries of Borrower on the date
hereof, other than the NEG Subsidiaries, shall promptly execute and deliver to
Administrative Agent an absolute and unconditional guaranty of the timely
repayment of the Obligations and the due and punctual performance of the
obligations of Borrower under the Loan Documents, which guaranty shall be
satisfactory to Administrative Agent in form and substance and shall be
delivered prior to the making of any Loan hereunder. IPO Co, upon its
acquisition of more than 10% of the issued and outstanding Equity of Borrower,
Debt Holdco, upon its acquisition of any Intercompany Obligation, each Person
that hereafter becomes a Subsidiary of Borrower, and each Person that is a NEG
Subsidiary on the date hereof but hereafter ceases to be a NEG Subsidiary but
remains a Subsidiary of Borrower, shall promptly execute and deliver to
Administrative Agent an absolute and unconditional guaranty of the timely
repayment of the Obligations and the due and punctual performance of the
obligations of Borrower under the Loan Documents, which guaranty shall be
satisfactory to Administrative Agent in form and substance. Borrower will cause
each such Guarantor to deliver to Administrative Agent, simultaneously with its
delivery of such a guaranty, written evidence satisfactory to Administrative
Agent and its counsel that such Guarantor has taken all company action necessary
to duly approve and authorize its execution, delivery and performance of such
guaranty and any other documents which it is required to execute. To the extent
that any Subsidiary of Borrower which is a Guarantor owes any Intercompany
Obligation to Borrower then, notwithstanding any restrictions on repayment of
such Intercompany Obligation in any Loan Document, any payment made by such
Subsidiary under its Guaranty will constitute a payment in the same amount of
such Intercompany Obligation owed by such Subsidiary to Borrower.

     Section 6.16. Production Proceeds. Notwithstanding that, by the terms of
the various Security Documents, Guarantors and Borrower are and will be
assigning to Administrative Agent and Lenders all of the "Production Proceeds"
(as defined therein) accruing to the property covered thereby, so long as no
Event of Default has occurred such Credit Parties may continue to receive from
the purchasers of production all such Production Proceeds, subject, however, to
the Liens created under the Security Documents, which Liens are hereby affirmed
and ratified. Upon the occurrence of an Event of Default, Administrative Agent
and Lenders may exercise all rights and remedies granted under the Security
Documents, including the right to obtain possession of all Production Proceeds
then held by Credit Parties or to receive directly from the purchasers of
production all other Production Proceeds. In no case shall any failure, whether
purposed or inadvertent, by Administrative Agent or Lenders to collect directly
any such Production Proceeds constitute in any way a waiver, remission or
release of any of their rights under the Security Documents, nor shall any
release of any Production Proceeds by Administrative Agent or Lenders to Credit
Parties constitute a waiver, remission, or release of any other Production
Proceeds or of any rights of Administrative Agent or Lenders to collect other
Production Proceeds thereafter.

     Section 6.17. Collateral.

     (a) At all times the Secured Obligations shall be secured by Liens (subject
only to Permitted Liens) covering and encumbering (i) at least 90% of the total
value of the proved reserves of oil and gas attributable to the Oil and Gas
Properties of Borrower and its Subsidiaries, other than the NEG Subsidiaries,
(ii) all of the issued and outstanding Equity of each Subsidiary of Borrower
that is owned by any Credit Party, (iii) all existing Intercompany

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Obligations (except for the obligation of NEGH to pay to NEGI the "NEGI Priority
Amount" referred to in clause (d) of the definition of "Intercompany
Obligations"), and (iv) Borrower's rights under the Restated NEGO Credit
Facility and under mortgages securing the Restated NEGO Credit Facility that
cover at least 90% of the total value of the proved reserves of oil and gas
attributable to the Oil and Gas Properties of the NEG Subsidiaries. On the date
hereof, and from time to time hereafter as any such Equity or Intercompany
Obligation is acquired by a Credit Party, such Credit Party shall deliver to
Administrative Agent for the ratable benefit of each Lender pledge agreements
covering such Equity and Intercompany Obligation, each in form and substance
acceptable to Administrative Agent.

     (b) To the extent necessary to comply with the first sentence of Section
6.17(a), (i) within 30 days after the delivery of each Engineering Report, the
Credit Parties that own Oil and Gas Properties shall execute and deliver
mortgages and deeds of trust in form and substance acceptable to Administrative
Agent, together with such other assignments, conveyances, amendments, agreements
and other writings (each duly authorized and executed) as Administrative Agent
shall deem necessary or appropriate to grant, evidence and perfect the Liens
required by this Section 6.17.

     (c) Borrower agrees to deliver and to cause each other Credit Party to
deliver, to further secure the Obligations (or, in the case of the NEG
Subsidiaries, to secure the Restated NEGO Credit Facility) whenever requested by
Administrative Agent in its sole and absolute discretion: (i) deeds of trust,
mortgages, chattel mortgages, security agreements, financing statements and
other Security Documents in form and substance satisfactory to Administrative
Agent for the purpose of granting, confirming, and perfecting Liens (subject
only to Permitted Liens) in any real or personal property now owned or hereafter
acquired by any Credit Party, (ii) transfer orders or letters in lieu thereof
with respect to the production and proceeds of production from the Collateral,
in form and substance satisfactory to Administrative Agent, and (iii) favorable
title opinions from legal counsel acceptable to Administrative Agent with
respect to any Credit Party's properties and interests designated by
Administrative Agent, based upon abstract or record examinations to dates
acceptable to Administrative Agent and (1) stating that such Credit Party has
good and defensible title to such properties and interests, free and clear of
all Liens other than Permitted Liens, (2) confirming that such properties and
interests are subject to Security Documents securing the Obligations that
constitute and create legal, valid and duly perfected deed of trust or mortgage
liens in such properties and interests and assignments of and security interests
in the oil and gas attributable to such properties and interests and the
proceeds thereof, subject only to Permitted Liens, and (c) covering such other
matters as Administrative Agent may reasonably request. Upon request by
Administrative Agent, Borrower will deliver, and will cause each other Credit
Party to deliver, releases of any Permitted Liens securing Intercompany
Obligations that are described in subsection (l) of the above definition of
"Permitted Liens".

     Section 6.18. Separateness of Each Credit Party. Each Credit Party will:
(a) maintain separate records and books of account that are distinct from those
of any Affiliate of such Credit Party, appropriately identifying such Credit
Party's separate assets and liabilities, and in such records and books of
account properly document all inter-Affiliate transactions; (b) except for
treasury management systems in which ownership of deposits and investments are
separately accounted for, not commingle its funds or assets with those of any
Affiliate of such Credit Party;

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(c) hold all appropriate meetings of its board of directors or other analogous
governing body to authorize and approve such Credit Party's actions, which
meetings are separate from those of other Affiliates, and at which meetings all
appropriate officers will be elected or appointed to offices that are separate
from those of Affiliates; and (d) not hold itself out as directly owning the
assets of its Affiliates, and not allow any Affiliate to hold itself out as
directly owning the assets of such Credit Party. For so long as NEGI is a
reporting company under the federal securities laws, Borrower will insure that
NEGI complies with the requirements of all Securities Laws to present the
Consolidated financial condition of NEGI and its Subsidiaries to the public
separately from that of Borrower and Borrower's other Subsidiaries.

                  ARTICLE VII - Negative Covenants of Borrower

     To conform with the terms and conditions under which each Lender Party is
willing to have credit outstanding to Borrower, and to induce each Lender Party
to enter into this Agreement and make the Loans, Borrower covenants and agrees
that until the full and final payment of the Obligations and the termination of
this Agreement, unless Majority Lenders have previously agreed otherwise:

     Section 7.1. Indebtedness. No Credit Party will in any manner owe or be
liable for Indebtedness except:

     (a) the Obligations.

     (b) Allowed Second Lien/Unsecured Indebtedness, and any guarantees thereof
by any of the Guarantors, provided that if Borrower has in connection with any
Borrowing Base determination requested Lenders to assume that Allowed Second
Lien/Unsecured Indebtedness will not be issued in the following six months,
Borrower may not issue or borrow Allowed Second Lien/Unsecured Indebtedness
until completion of the next following Borrowing Base determination in
connection with which Borrower has requested Lenders to assume that the Allowed
Second Lien/Unsecured Indebtedness will be issued in the following six months.

     (c) Intercompany Obligations.

     (d) Indebtedness for borrowed money hereafter lent to Borrower by one or
more of its equity owners, provided that such Indebtedness (i) does not provide
for any payments in cash or in property of Borrower, whether for principal,
interest or otherwise, prior to the payment in full of the Obligations, (ii) has
a scheduled maturity after the Maturity Date, which maturity cannot be
accelerated prior to the Maturity Date under any circumstances, (iii) is not
secured, and (iv) is otherwise subordinated to the Obligations upon terms and
conditions satisfactory to Administrative Agent in its sole and absolute
discretion.

     (e) Indebtedness outstanding under the instruments and agreements described
in Section 7.1(e) of the Disclosure Schedule (excluding any renewals or
extensions of such Indebtedness).

     (f) Indebtedness arising under Hedging Contracts permitted under Section
7.3.

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     (g) purchase money Indebtedness in an aggregate principal amount not to
exceed $15,000,000 at any time that is incurred for the purchase of equipment,
provided that the original principal amount of any such Indebtedness shall not
be in excess of the purchase price of the equipment acquired thereby and such
Indebtedness shall be secured only by the acquired equipment, any accessions
thereto and any proceeds thereof.

     (h) Indebtedness of IPO Co or Borrower owing to AREH or any of its
Affiliates for expenses incurred for the Initial Equity Offering, provided that
the terms of such Indebtedness provide that such Indebtedness will be paid out
of - and only out of - the proceeds of the Initial Equity Offering.

     (i) miscellaneous items of Indebtedness not described in subsections (a)
through (g) which do not in the aggregate (taking into account all such
Indebtedness of all Credit Parties) exceed $10,000,000 at any one time
outstanding.

     Section 7.2. Limitation on Liens. Except for Permitted Liens, no Credit
Party will create, assume or permit to exist any Lien upon any of the properties
or assets which it now owns or hereafter acquires.

     Section 7.3. Hedging Contracts.

     (a) No Credit Party will be a party to or in any manner be liable on any
Hedging Contract except:

          (i) Hedging Contracts entered into by Borrower or (prior to the
     Initial Equity Offering) by NEGO with the purpose and effect of fixing
     prices on oil or gas expected to be produced by NEGO, National Onshore or
     National Offshore (in the case of Hedging Contracts entered into by
     Borrower) or by NEGO (in the case of Hedging Contracts entered into by
     NEGO), provided that at all times: (1) the aggregate monthly production
     covered by all such contracts of Borrower (determined, in the case of
     contracts that are not settled on a monthly basis, by a monthly proration
     acceptable to Administrative Agent) for any single month does not in the
     aggregate exceed eighty percent (80%) of Credit Parties' (excluding the NEG
     Subsidiaries) aggregate Projected Oil and Gas Production anticipated (at
     the time such Hedging Contract is entered into) to be sold in the ordinary
     course of such Credit Parties' businesses for such month, (2) the aggregate
     monthly production covered by all such contracts of NEGO (determined, in
     the case of contracts that are not settled on a monthly basis, by a monthly
     proration acceptable to Administrative Agent) for any single month does not
     in the aggregate exceed eighty percent (80%) of NEGO's aggregate Projected
     Oil and Gas Production anticipated (at the time such Hedging Contract is
     entered into) to be sold in the ordinary course of the NEGO's business for
     such month, (3) except for letters of credit and the Collateral under the
     Security Documents with respect to Lender Hedging Obligations, no such
     contract requires any Credit Party to put up money, assets, or other
     security against the event of its nonperformance prior to actual default by
     such Credit Party in performing its obligations thereunder, and (4) each
     such contract is with a counterparty or has a guarantor of the obligation
     of the counterparty who (unless such counterparty is a Lender or one of its
     Affiliates) at the time the contract is made has long-term obligations
     rated A or A2 or

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     better, respectively, by either Rating Agency. As used in this subsection,
     the term "Projected Oil and Gas Production" means the projected production
     of oil or gas (measured by volume unit or BTU equivalent, not sales price)
     from properties and interests owned by any Credit Party which are located
     in or offshore of the United States and which have attributable to them
     proved producing oil or gas reserves, as such production from proved
     producing reserves is projected in the most recent Engineering Report
     delivered pursuant to Section 6.2(f) or (g), after deducting projected
     production from any properties or interests sold or under contract for sale
     that had been included in such report and after adding projected production
     from any properties or interests that had not been reflected in such report
     but that are reflected in a separate or supplemental reports meeting the
     requirements of such Section 6.2(f) or (g) above and otherwise are
     satisfactory to Administrative Agent; and

          (ii) Hedging Contracts entered into by Borrower or NEGO with the
     purpose and effect of fixing interest rates (or reversing previous Hedging
     Contracts entered into to fix such interest rates) on a principal amount of
     Indebtedness of Borrower or NEGO that is accruing interest at a variable
     rate, provided that (i) the aggregate notional amount of such contracts
     never exceeds one hundred percent (100%) of the anticipated outstanding
     principal balance of the Indebtedness to be hedged by such contracts or an
     average of such principal balances calculated using a generally accepted
     method of matching interest swap contracts to declining principal balances,
     (ii) the floating rate index of each such contract generally matches the
     index used to determine the floating rates of interest on the corresponding
     Indebtedness to be hedged by such contract and (iii) each such contract is
     with a counterparty or has a guarantor of the obligation of the
     counterparty who (unless such counterparty is a Lender or an Affiliate of
     any Lender at the time such contract is entered into) at the time the
     contract is made has long-term unsecured and unenhanced debt obligations
     rated A or A2 or better, respectively, by either Rating Agency; and

     (b) No Credit Party will terminate or amend the Required Closing Date
Hedges, except to the extent such Credit Party replaces such Required Closing
Date Hedges with new Hedging Contracts allowed under Section 7.3(a) that provide
equal or greater price protection on the same or greater amount of Projected Oil
and Gas Production.

     Section 7.4. Limitation on Mergers, Issuances of Securities. Other than as
contemplated in the above definition of "Initial Equity Offering", no Credit
Party will merge or consolidate with or into any other Person, or be liquidated
into any Person, except that any Subsidiary of Borrower may be merged into or
consolidated or liquidated with (a) another Subsidiary of Borrower, so long as a
Guarantor is the surviving business entity, or (b) Borrower, so long as Borrower
is the surviving business entity; provided that no Default or Event of Default
exists or would exist after giving effect to such merger or consolidation and
that all parties to such transaction are Solvent both before and (to the extent
still existing) after such transaction. Borrower will not issue any Equity
securities other than its common Equity and any options or warrants giving the
holders thereof only the right to acquire such common Equity. No Subsidiary of
Borrower will issue any additional shares of its Equity securities or any
options, warrants or other rights to acquire such additional Equity securities
except to Borrower or a Guarantor and only to the extent not otherwise forbidden
under the terms hereof.

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     Section 7.5. Limitation on Sales of Property. Except for transfers pursuant
to any merger, consolidation or liquidation permitted under Section 7.4 or any
Distribution permitted under Section 7.6, no Credit Party will (or agree to)
sell, transfer, lease, exchange, alienate or dispose of any of its material
assets or properties or any material interest therein, or discount, sell, pledge
or assign any notes payable to it, accounts receivable or future income, except,
to the extent not otherwise forbidden under the Security Documents:

     (a) equipment which is worthless or obsolete or which is replaced by
equipment of equal suitability and value;

     (b) inventory (including oil and gas sold as produced and seismic data)
which is sold in the ordinary course of business on ordinary trade terms;

     (c) Equity interests of any of Borrower's Subsidiaries which are
transferred to Borrower or a Guarantor; and

     (d) any Oil and Gas Properties which are sold or otherwise transferred for
fair consideration to Persons who are not Affiliates of Borrower, provided that
(i) no Default exists at the time of any such sale or other transfer of
Collateral (other than Defaults that will be cured upon the application of the
proceeds of such sale or other transfer), (ii) Borrower must first give notice
to Administrative Agent of any such sale of properties subject to Security
Documents, (iii) if the Oil and Gas Properties so sold or transferred, on a
cumulative basis since the then most recent Determination Date, represent more
than ten percent of the value of all of the proved reserves of Borrower and its
Subsidiaries, as determined in the most recently delivered Engineering Report,
the sale or other transfer may not be made until Administrative Agent and the
Lenders have made a Special Determination as contemplated in Section 2.9(d), and
(iv) concurrently with such sale or other transfer Borrower must pay in full any
Borrowing Base Deficiency that results from such Special Determination.

Administrative Agent shall deliver to Borrower a release with respect to any
Collateral sold in accordance with this section and shall execute and deliver
such instruments and documents as shall reasonably be requested by Borrower to
evidence and record such release, and each Lender hereby irrevocably consents to
and authorizes all such release, instruments and documents.

     Section 7.6. Limitation on Distributions; Prepayments of Allowed Second
Lien/Unsecured Indebtedness. No Credit Party will declare or make any
Distribution, other than, so long as no Event of Default or Borrowing Base
Deficiency exists after giving effect to such Distribution:

     (a) Distributions permitted under Section 2.4 hereof.

     (b) Distributions payable to Borrower or to Guarantors that are
Subsidiaries of Borrower, to the extent not in violation of the investment
restrictions of Section 7.7.

     (c) Distributions payable to Borrower's Equity holders out of the proceeds
from the issuance or borrowing of Allowed Second Lien/Unsecured Indebtedness,
provided that the condition described in Section 4.1(r) is satisfied as of the
date of such Distribution.

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     (d) Distributions that result in Debt Holdco holding Intercompany
Obligations and becoming a Guarantor as contemplated in subsection (c) of the
definition of "Intercompany Obligations".

     (e) Distributions in accordance with the above definition of "Initial
Equity Offering".

     (f) Distributions by a Credit Party payable only in such Credit Party's
common Equity, so long as Borrower's interest in any of its Subsidiaries is not
thereby reduced.

     (g) with respect to any period during which Borrower is a pass-through
entity or disregarded entity for federal income tax purposes, quarterly cash
Distributions to each Equity holder in Borrower for the US federal, state and
local income taxes, including estimated taxes, payable by such Equity holder (in
any jurisdiction in which Borrower or its Subsidiaries own Oil and Gas
Properties) that are attributable to the taxable income allocated to such Equity
holder from Borrower and its Subsidiaries, calculated assuming that such Equity
holder is taxed as a corporation for federal income tax purposes and has no
income or losses other than its share of Borrower's income or losses (taking
into account for any period any loss carry-forwards of such Equity holder
attributable to losses allocated to such Equity holder from Borrower for prior
periods that have not previously been offset by income from Borrower, and taking
into account any adjustments for previous estimated taxes) and provided that
each such Distribution shall be made no earlier than 20 days prior to the due
date for such tax (or the date that quarterly estimated taxes are required to be
paid) that would apply to Borrower if it were a Delaware corporation.

     (h) other cash Distributions to Borrower's Equity holders in an aggregate
amount not to exceed $8,000,000 in any Fiscal Year.

     (i) Distributions of cash by any NEG Subsidiary to the extent not
restricted under the Restated NEGO Credit Facility.

     (j) repayments to AREH or any of its Affiliates of approximately
$38,300,000 heretofore borrowed by National Offshore from AREH and approximately
$1,500,000 heretofore borrowed by NEGO from AREH to provide cash collateral for
Hedging Contracts, which repayments may only be made using such cash collateral
(or in the amount of such cash collateral) at the time such cash collateral is
released at or after the Closing Date (and, to the extent such cash collateral
is not released at the Closing Date, the foregoing Indebtedness to be repaid
thereby shall be deemed permitted under Section 7.1 and the yet-to-be released
Liens on such cash collateral shall be deemed to be Permitted Liens, in each
case until such cash collateral is so released).

     (k) only to the extent made out of proceeds of the Initial Equity Offering
received by Borrower from IPO Co, payments by Borrower on behalf of IPO Co of
the expenses of the Initial Equity Offering (including repayment of Indebtedness
described in Section 7.1(h).

     (l) after IPO Co becomes a guarantor, any dividend by IPO Co of any
Distributions from Borrower permitted under subsection (h).

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Borrower may make no prepayment of Allowed Second Lien/Unsecured Indebtedness if
the Facility Usage exceeds 90% of the Available Borrowing Base after giving
effect to such prepayment or if any Default or Borrowing Base Deficiency then
exists under this Agreement after giving effect to such prepayment. Borrower is
otherwise free to prepay the Allowed Second Lien/Unsecured Indebtedness, in
whole or in part, at any time. This Section 7.6 does not prevent Borrower or any
of its Subsidiaries from reimbursing IPO Co or NEGI for all of their costs
incurred to manage the properties of Borrower and its Subsidiaries. For as long
as the sole business of IPO Co is to own its interest in Borrower, serve as the
managing member of Borrower, and otherwise manage the business and properties of
Borrower and its Subsidiaries, this reimbursement may include all of IPO Co's
cash expenses.

     Section 7.7. Limitation on Investments and New Businesses. No Credit Party
will (a) make any expenditure or commitment or incur any obligation or enter
into or engage in any transaction except in the ordinary course of the oil and
gas business, (b) engage directly or indirectly in any business or conduct any
operations except in connection with or incidental to its present oil and gas
businesses and operations, or (c) make any Investments in any Person other than
Permitted Investments.

     Section 7.8. Limitation on Credit Extensions. Except for Permitted
Investments, no Credit Party will extend credit, make advances or make loans
other than normal and prudent extensions of credit to customers or joint working
interest owners in the ordinary course of business, which extensions shall not
be for longer periods than those extended by similar businesses operated in a
normal and prudent manner.

     Section 7.9. Transactions with Affiliates; No Prepayments or Amendments of
Restated NEGO Credit Facility. Except for transactions contemplated in the above
definition of "Initial Equity Offering" or as permitted pursuant to Section 7.6
or Section 7.1(d), neither Borrower nor any of its Subsidiaries nor any
Guarantor will engage in any material transaction with any Person that is an
Affiliate of Borrower on terms which are less favorable to it than those which
would have been obtainable at the time in arm's-length dealing with Persons
other than such Affiliates, provided that such restriction shall not apply to
transactions solely among Borrower and Guarantors. Until NEGO becomes a
Guarantor, no prepayments will be made or allowed under the Restated NEGO Credit
Facility if such prepayment would decrease the outstanding principal amount
thereof to less than $160,000,000. Borrower will not amend, modify, or waive any
provision of, or consent to any amendment, modification or waiver of any
provision of, or assign any of its rights under, the Restated NEGO Credit
Facility or any of the "Loan Documents" as defined therein except either
pursuant to the Security Documents or with the consent of Administrative Agent.

     Section 7.10. Prohibited Contracts. Except as set forth in Section 7.10 of
the Disclosure Schedule, no Credit Party will, directly or indirectly, enter
into, create, or otherwise allow to exist any contract or other consensual
restriction on the ability of any Subsidiary of Borrower to: (a) pay dividends
or make other distributions to Borrower, (b) to redeem equity interests held in
it by Borrower, (c) to repay loans and other indebtedness owing by it to
Borrower, or (d) to transfer any of its assets to Borrower. No Credit Party will
enter into any "take-or-pay" contract or other contract or arrangement for the
purchase of goods or services which obligates it to pay for such goods or
service regardless of whether they are delivered or furnished to it. No Credit

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Party will hereafter enter into any contract or agreement that forbids it from
granting the Liens required hereunder.

     Section 7.11. Financial Covenants.

     (a) Leverage Ratio. Borrower will not permit the Leverage Ratio to be
greater than 3.5 to 1.0.

     (b) Consolidated Tangible Net Worth. Borrower will not permit Consolidated
Tangible Net Worth to be less than $240,000,000, plus 50% of Consolidated Net
Income for each Fiscal Quarter ended after December 31, 2005 for which
Consolidated Net Income was positive.

     (c) Current Ratio. Borrower will not permit the ratio of Consolidated
Current Assets to Consolidated Current Liabilities to be less than 1.0 to 1.0.

                 ARTICLE VIII - Events of Default and Remedies

     Section 8.1. Events of Default. Each of the following events constitutes an
Event of Default under this Agreement:

     (a) Any Credit Party fails to pay any principal component of any Obligation
when due and payable, whether at a date for the payment of a fixed installment
or as a contingent or other payment becomes due and payable or as a result of
acceleration or otherwise;

     (b) Any Credit Party fails to pay any Obligation (other than the
Obligations in subsection (a) above) when due and payable, whether at a date for
the payment of a fixed installment or as a contingent or other payment becomes
due and payable or as a result of acceleration or otherwise, within three
Business Days after the same becomes due;

     (c) The occurrence of an "Event of Default" as defined in the Restated NEGO
Credit Facility;

     (d) Any Credit Party fails to duly observe, perform or comply with any
covenant, agreement or provision of Section 6.4 (a) and (b) or Article VII;

     (e) Any Credit Party fails (other than as referred to in subsections (a),
(b), (c) or (d) above) to duly observe, perform or comply with any covenant,
agreement, condition or provision of any Loan Document to which it is a party or
any Hedging Contract relating to Lender Hedging Obligations, and such failure
remains unremedied for a period of thirty (30) days after notice of such failure
is given by Administrative Agent to Borrower;

     (f) Any representation or warranty made herein or in any writing by or on
behalf of any Credit Party in connection with any Loan Document shall prove to
have been false or incorrect in any material respect on any date on or as of
which made, or any Loan Document at

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any time ceases to be valid, binding and enforceable for any reason other than
its release or subordination by Administrative Agent;

     (g) The occurrence of any Termination Event;

     (h) Any Credit Party:

          (i) suffers the entry against it of a judgment, decree or order for
     relief by a Governmental Authority of competent jurisdiction in an
     involuntary proceeding commenced under any applicable bankruptcy,
     insolvency or other similar Law of any jurisdiction now or hereafter in
     effect, including the federal Bankruptcy Code, as from time to time
     amended, or has any such proceeding commenced against it which remains
     undismissed for a period of sixty days; or

          (ii) commences a voluntary case under any applicable bankruptcy,
     insolvency or similar Law now or hereafter in effect, including the federal
     Bankruptcy Code, as from time to time amended; or applies for or consents
     to the entry of an order for relief in an involuntary case under any such
     Law; or makes a general assignment for the benefit of creditors; or is
     generally not paying (or admits in writing its inability to pay) its debts
     as such debts become due; or takes corporate or other action authorizing
     any of the foregoing; or

          (iii) suffers the appointment of or taking possession by a receiver,
     liquidator, assignee, custodian, trustee, sequestrator or similar official
     of all or a substantial part of its assets or of any part of the Collateral
     in a proceeding brought against or initiated by it, and such appointment or
     taking possession is neither made ineffective nor discharged within sixty
     days after the making thereof, or such appointment or taking possession is
     at any time consented to, requested by, or acquiesced to by it; or

          (iv) suffers the entry against it of a final judgment for the payment
     of money in excess of $15,000,000 (not covered by insurance satisfactory to
     Administrative Agent in its discretion), unless the same is discharged
     within thirty days after the date of entry thereof or an appeal or
     appropriate proceeding for review thereof is taken within such period and a
     stay of execution pending such appeal is obtained; or

          (v) suffers a writ or warrant of attachment or any similar process to
     be issued by any Governmental Authority against all or any substantial part
     of its assets or any part of the Collateral, and such writ or warrant of
     attachment or any similar process is not stayed or released within thirty
     days after the entry or levy thereof or after any stay is vacated or set
     aside;

     (i) Any Credit Party (i) fails to pay any portion, when such portion is
due, of any of its Indebtedness (including any Allowed Second Lien/Unsecured
Indebtedness) in excess of $10,000,000, or (ii) breaches or defaults in the
performance of any agreement or instrument by which any such Indebtedness is
issued, evidenced, governed, or secured, any such failure, breach or default
continues beyond any applicable period of grace provided therefore, and the
effect of any failure referred to in this clause (ii) is to cause, or permit the
holder or holders of such

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Indebtedness or a trustee on its or their behalf (with or without the giving of
notice) to cause, such Indebtedness to become due prior to its stated maturity;

     (j) The Loan Documents after delivery thereof shall for any reason, except
to the extent permitted by the terms thereof, cease to be in full force and
effect and valid, binding and enforceable in accordance with their terms against
the Borrower or any Guarantor party thereto or shall be repudiated by any of
them, or cease to create a valid and perfected Lien of the priority required
thereby on any of the Collateral purported to be covered thereby, except to the
extent permitted by the terms of this Agreement, or the Borrower or a Guarantor
shall so state in writing; and

     (k) Any Change of Control occurs.

Upon the occurrence of an Event of Default described in subsection (h)(i),
(h)(ii) or (h)(iii) of this section with respect to any Credit Party, all of the
Obligations shall thereupon be immediately due and payable, without demand,
presentment, notice of demand or of dishonor and nonpayment, protest, notice of
protest, notice of intention to accelerate, declaration or notice of
acceleration, or any other notice or declaration of any kind, all of which are
hereby expressly waived by Borrower and each Credit Party who at any time
ratifies or approves this Agreement. Upon any such acceleration, any obligation
of any Lender to make any further Loans and any obligation of LC Issuer to issue
Letters of Credit hereunder shall be permanently terminated. During the
continuance of any other Event of Default, Administrative Agent at any time and
from time to time may (and upon written instructions from Majority Lenders,
Administrative Agent shall), without notice to Borrower or any other Credit
Party, do either or both of the following: (1) terminate any obligation of
Lenders to make Loans hereunder, and any obligation of LC Issuer to issue
Letters of Credit hereunder, and (2) declare any or all of the Obligations
immediately due and payable, and all such Obligations shall thereupon be
immediately due and payable, without demand, presentment, notice of demand or of
dishonor and nonpayment, protest, notice of protest, notice of intention to
accelerate, declaration or notice of acceleration, or any other notice or
declaration of any kind, all of which are hereby expressly waived by Borrower
and each Credit Party who at any time ratifies or approves this Agreement.

     Section 8.2. Remedies. If any Event of Default shall occur and be
continuing, each Lender Party may protect and enforce any rights provided to it
under the Loan Documents by any available proceedings, including proceedings for
specific performance. All rights, remedies and powers conferred upon Lender
Parties under the Loan Documents shall be deemed cumulative and not exclusive of
any other rights, remedies or powers available under the Loan Documents or at
Law or in equity.

     Section 8.3. Application of Proceeds after Acceleration. If Administrative
Agent collects or receives money pursuant to the Loan Documents after the
acceleration of the Obligations as provided in Section 8.1 or upon foreclosure
upon Collateral, Administrative Agent shall distribute all money so collected or
received in accordance with the Intercreditor Agreement and then:

     (a) first to any reimbursements due Administrative Agent hereunder or under
any Security Document; and

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     (b) then ratably to the payment of the Obligations, including LC
Obligations (and among the outstanding Obligations in the manner provided in
Section 3.1), and the Lender Hedging Obligations, until such Obligations and
Lender Hedging Obligations are paid in full.

Administrative Agent shall have no responsibility to determine the existence or
amount of Lender Hedging Obligations and may reserve from the application of
amounts under this Section amounts distributable in respect of Lender Hedging
Obligations until it has received evidence satisfactory to it of the existence
and amount of such Lender Hedging Obligations.

                       ARTICLE IX - Administrative Agent

     Section 9.1. Appointment and Authority. Each of the Lenders and LC Issuer
hereby irrevocably appoints Citicorp USA, Inc. to act on its behalf as
Administrative Agent hereunder and under the other Loan Documents and authorizes
Administrative Agent to take such actions on its behalf and to exercise such
powers as are delegated to Administrative Agent by the terms hereof or thereof,
together with such actions and powers as are reasonably incidental thereto. The
provisions of this Article are solely for the benefit of the Lender Parties, and
neither Borrower nor any other Credit Party shall have rights as a third party
beneficiary of any of such provisions. Administrative Agent shall not have any
duties or obligations except those expressly set forth herein and in the other
Loan Documents. Without limiting the generality of the foregoing, Administrative
Agent:

     (a) shall not be subject to any fiduciary or other implied duties,
regardless of whether a Default has occurred and is continuing;

     (b) shall not have any duty to take any discretionary action or exercise
any discretionary powers, except discretionary rights and powers expressly
contemplated hereby or by the other Loan Documents that Administrative Agent is
required to exercise as directed in writing by the Majority Lenders (or such
other number or percentage of Lenders as shall be expressly provided for herein
or in the other Loan Documents), provided that Administrative Agent shall not be
required to take any action that, in its opinion or the opinion of its counsel,
may expose Administrative Agent to liability or that is contrary to any Loan
Document or applicable law; and

     (c) shall not, except as expressly set forth herein and in the other Loan
Documents, have any duty to disclose, and shall not be liable for the failure to
disclose, any information relating to Borrower or any of its Affiliates that is
communicated to or obtained by the Person serving as Administrative Agent or any
of its Affiliates in any capacity.

     Administrative Agent shall not be liable for any action taken or not taken
by it (i) with the consent or at the request of Majority Lenders (or such other
number or percentage of the Lenders as shall be necessary, or as Administrative
Agent shall believe in good faith shall be necessary, under the circumstances as
provided in Sections 10.1 and 8.2) or (ii) in the absence of its own gross
negligence or willful misconduct. Administrative Agent shall be deemed not to
have knowledge of any Default unless and until notice describing such Default is
given to Administrative Agent by Borrower or a Lender.

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     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 or any other Loan Document, (ii) the
contents of any certificate, report or other document delivered hereunder or
thereunder or in connection herewith or therewith, (iii) the performance or
observance of any of the covenants, agreements or other terms or conditions set
forth herein or therein or the occurrence of any Default, (iv) the validity,
enforceability, effectiveness or genuineness of this Agreement, any other Loan
Document 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 Administrative
Agent.

     Section 9.2. Reliance by Administrative Agent. 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 (including any electronic message, Internet or intranet website
posting or other distribution) believed by it to be genuine and to have been
signed, sent or otherwise authenticated by the proper Person. Administrative
Agent also may rely upon any statement made to it orally or by telephone and
believed by it to have been made by the proper Person, and shall not incur any
liability for relying thereon. In determining compliance with any condition
hereunder to the making of a Loan, or the issuance of a Letter of Credit, that
by its terms must be fulfilled to the satisfaction of a Lender or LC Issuer,
Administrative Agent may presume that such condition is satisfactory to such
Lender or LC Issuer unless Administrative Agent shall have received notice to
the contrary from such Lender or LC Issuer prior to the making of such Loan or
the issuance of such Letter of Credit. Administrative Agent may consult with
legal counsel (who may be counsel for 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.

     Section 9.3. Non-Reliance on Administrative Agent and Other Lenders. Each
Lender Party acknowledges that it has, independently and without reliance upon
Administrative Agent or any other Lender Party or any of their Related Parties
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
Party also acknowledges that it will, independently and without reliance upon
Administrative Agent or any other Lender Party or any of their Related Parties
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 other Loan Document or any related
agreement or any document furnished hereunder or thereunder.

     Section 9.4. Rights as a Lender. The Person serving as 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 Administrative
Agent and the term "Lender" or "Lenders" shall, unless otherwise expressly
indicated or unless the context otherwise requires, include the Person serving
as Administrative Agent hereunder in its individual capacity. Such Person and
its Affiliates may accept deposits from, lend money to, act as the financial
advisor or in any other advisory capacity for and generally engage in any kind
of business with Borrower or any Subsidiary or other Affiliate thereof as if
such Person were not Administrative Agent hereunder and without any duty to
account therefor to the Lenders.

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     Section 9.5. Sharing of Set-Offs and Other Payments. Each Lender Party
agrees that if it shall, whether through the exercise of rights under Security
Documents or rights of banker's lien, set off, or counterclaim against Borrower
or otherwise, obtain payment of a portion of the aggregate Obligations owed to
it, taking into account all distributions made by Administrative Agent under
Section 3.1, causes such Lender Party to have received more than it would have
received had such payment been received by Administrative Agent and distributed
pursuant to Section 3.1, then (a) it shall be deemed to have simultaneously
purchased and shall be obligated to purchase interests in the Obligations as
necessary to cause all Lender Parties to share all payments as provided for in
Section 3.1, and (b) such other adjustments shall be made from time to time as
shall be equitable to ensure that Administrative Agent and all Lender Parties
share all payments of Obligations as provided in Section 3.1; provided, however,
that nothing contained in this section shall in any way affect the right of any
Lender Party to obtain payment (whether by exercise of rights of banker's lien,
set-off or counterclaim or otherwise) of indebtedness other than the
Obligations. Borrower expressly consents to the foregoing arrangements and
agrees that any holder of any such interest or other participation in the
Obligations, whether or not acquired pursuant to the foregoing arrangements, may
to the fullest extent permitted by Law exercise any and all rights of banker's
lien, set-off, or counterclaim as fully as if such holder were a holder of the
Obligations in the amount of such interest or other participation. If all or any
part of any funds transferred pursuant to this section is thereafter recovered
from the seller under this section which received the same, the purchase
provided for in this section shall be deemed to have been rescinded to the
extent of such recovery, together with interest, if any, if interest is required
pursuant to the order of a Governmental Authority order to be paid on account of
the possession of such funds prior to such recovery.

     Section 9.6. Investments. Whenever Administrative Agent in good faith
determines that it is uncertain about how to distribute to Lender Parties any
funds which it has received, or whenever Administrative Agent in good faith
determines that there is any dispute among Lender Parties about how such funds
should be distributed, Administrative Agent may choose to defer distribution of
the funds which are the subject of such uncertainty or dispute. If
Administrative Agent in good faith believes that the uncertainty or dispute will
not be promptly resolved, or if Administrative Agent is otherwise required to
invest funds pending distribution to Lender Parties, Administrative Agent shall
invest such funds in Cash Equivalents pending distribution; all interest on any
such Investment shall be distributed upon the distribution of such Investment
and in the same proportion and to the same Persons as such Investment. All
moneys received by Administrative Agent for distribution to Lender Parties
(other than to the Person who is Administrative Agent in its separate capacity
as a Lender or LC Issuer) shall be held by Administrative Agent pending such
distribution solely as Administrative Agent for such Lender Parties, and
Administrative Agent shall have no equitable title to any portion thereof.

     Section 9.7. Resignation of Administrative Agent. Administrative Agent may
at any time give notice of its resignation to the Lenders and Borrower. Upon
receipt of any such notice of resignation, Majority Lenders shall have the
right, in consultation with Borrower, to appoint a successor, which shall be a
bank with an office in the United States, or an Affiliate of any such bank with
an office in the United States. If no such successor shall have been so
appointed by Majority 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 Parties,
appoint a successor Administrative Agent meeting the

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qualifications set forth above provided that if Administrative Agent shall
notify Borrower and the Lenders that no qualifying Person has accepted such
appointment, then such resignation shall nonetheless become effective in
accordance with such notice and (1) the retiring Administrative Agent shall be
discharged from its duties and obligations hereunder and under the other Loan
Documents (except that in the case of any Collateral held by Administrative
Agent on behalf of the Lenders Parties under any of the Loan Documents, the
retiring Administrative Agent shall continue to hold such Collateral until such
time as a successor Administrative Agent is appointed) and (2) all payments,
communications and determinations provided to be made by, to or through
Administrative Agent shall instead be made by or to each Lender Parties
directly, until such time as Majority Lenders appoint a successor Administrative
Agent as provided for above in this paragraph. Upon the acceptance of a
successor's appointment as Administrative Agent hereunder, such successor shall
succeed to and become vested with all of the rights, powers, privileges and
duties of the retiring (or retired) Administrative Agent, and the retiring
Administrative Agent shall be discharged from all of its duties and obligations
hereunder or under the other Loan Documents (if not already discharged therefrom
as provided above in this paragraph). The fees payable by Borrower to a
successor Administrative Agent shall be the same as those payable to its
predecessor unless otherwise agreed between Borrower and such successor. After
the retiring Administrative Agent's resignation hereunder and under the other
Loan Documents, the provisions of this Article and Section 10.4 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 the retiring Administrative Agent was acting as
Administrative Agent.

     Section 9.8. Delegation of Duties. Administrative Agent may perform any and
all of its duties and exercise its rights and powers hereunder or under any
other Loan Document by or through any one or more sub-agents appointed by
Administrative Agent. Administrative Agent and any such sub-agent may perform
any and all of its duties and exercise its rights and powers by or through their
respective Related Parties. The exculpatory provisions of this Article shall
apply to any such sub-agent and to the Related Parties of 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.

     Section 9.9. No Other Duties, etc. Anything herein to the contrary
notwithstanding, none of the "Bookrunners," "Arrangers," "Co-Arrangers,"
"Syndication Agent" or "Documentation Agent" listed on the cover page hereof
shall have any powers, duties or responsibilities under this Agreement or any of
the other Loan Documents, except in its capacity, as applicable, as
Administrative Agent, a Lender or LC Issuer hereunder.

                            ARTICLE X - Miscellaneous

     Section 10.1. Waivers and Amendments; Acknowledgments.

     (a) Waivers and Amendments. No failure or delay (whether by course of
conduct or otherwise) by any Lender in exercising any right, power or remedy
which such Lender Party may have under any of the Loan Documents shall operate
as a waiver thereof or of any other right,

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power or remedy, nor shall any single or partial exercise by any Lender Party of
any such right, power or remedy preclude any other or further exercise thereof
or of any other right, power or remedy. No waiver of any provision of any Loan
Document and no consent to any departure therefrom shall ever be effective
unless it is in writing and signed as provided below in this section, and then
such waiver or consent shall be effective only in the specific instances and for
the purposes for which given and to the extent specified in such writing. No
notice to or demand on any Credit Party shall in any case of itself entitle any
Credit Party to any other or further notice or demand in similar or other
circumstances. This Agreement and the other Loan Documents set forth the entire
understanding between the parties hereto with respect to the transactions
contemplated herein and therein and supersede all prior discussions and
understandings with respect to the subject matter hereof and thereof, and no
waiver, consent, release, modification or amendment of or supplement to this
Agreement or the other Loan Documents shall be valid or effective against any
party hereto unless the same is in writing and signed by (i) if such party is
Borrower, by Borrower, (ii) if such party is Administrative Agent or LC Issuer,
by such party, and (iii) if such party is a Lender, by Majority Lenders.
Notwithstanding the foregoing or anything to the contrary herein (but subject to
Section 2.17), Administrative Agent shall not, without the prior consent of each
individual Lender, execute and deliver on behalf of such Lender any waiver or
amendment which would:

          (1) waive any of the conditions specified in Article IV,

          (2) increase the maximum amount which such Lender is committed
     hereunder to lend,

          (3) reduce any fees payable to such Lender hereunder, or the principal
     of, or interest on, such Lender's Note,

          (4) extend the Maturity Date or postpone any date fixed for any
     payment of any such fees, principal or interest,

          (5) amend the definition herein of "Majority Lenders" or "Super
     Majority Lenders" or otherwise change the aggregate amount of Percentage
     Shares which is required for Administrative Agent, Lenders or any of them
     to take any particular action under the Loan Documents,

          (6) release Borrower from its obligation to pay such Lender's
     Obligations or release any Guarantor from its Guaranty of such payment,
     except that a Guarantor's Guaranty may be released in connection with a
     sale of such Guarantor's Equity that has been consented to by Majority
     Lenders and except that Debt Holdco's Guaranty (as well as its Obligations
     under any other Security Documents) shall be released upon the payment or
     termination, or reassignment to Borrower, or any combination of the
     foregoing, of all Intercompany Obligations owing to Debt Holdco by Borrower
     or any of Borrower's Subsidiaries,

          (7) release all or any material portion of the Collateral, except for
     such releases relating to sales or dispositions of property permitted by
     the Loan Documents or required

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     under any intercreditor agreement entered into in connection with the
     "Second Lien Notes" (as described in Schedule 4) issued by Borrower in
     compliance herewith, or

          (8) amend this Section 10.1(a).

Notwithstanding the foregoing or anything to the contrary herein, Administrative
Agent shall not, without the prior consent of each individual Lender affected
thereby (or, as applicable, an Affiliate of such Lender), execute and deliver
any waiver or amendment to any Loan Document which would (i) cause an obligation
under any outstanding Hedging Contract owing to such Lender (or its Affiliate)
that, prior to such waiver or amendment, constituted a "Lender Hedging
Obligation" as defined herein to cease to be a "Lender Hedging Obligation" as
defined herein or (ii) change the provisions of Section 8.3 in any way that
reduced the ratable payment of such Lender Hedging Obligation as set out in such
section.

     (b) Acknowledgments and Admissions. Borrower hereby represents, warrants,
acknowledges and admits that (i) it has been advised by counsel in the
negotiation, execution and delivery of the Loan Documents to which it is a
party, (ii) it has made an independent decision to enter into this Agreement and
the other Loan Documents to which it is a party, without reliance on any
representation, warranty, covenant or undertaking by any Lender Party, whether
written, oral or implicit, other than as expressly set out in this Agreement or
in another Loan Document delivered on or after the date hereof, (iii) there are
no representations, warranties, covenants, undertakings or agreements by any
Lender Party as to the Loan Documents except as expressly set out in this
Agreement or in another Loan Document delivered on or after the date hereof,
(iv) no Lender Party has any fiduciary obligation toward Borrower with respect
to any Loan Document or the transactions contemplated thereby, (v) the
relationship pursuant to the Loan Documents between Borrower and the other
Credit Parties, on one hand, and each Lender Party on the other hand, is and
shall be solely that of debtor and creditor, respectively, provided that, solely
for purposes of Section 10.5(c), Administrative Agent shall act as the agent of
Borrower in maintaining the Register as set forth therein, (vi) no partnership
or joint venture exists with respect to the Loan Documents between any Credit
Party and any Lender Party, (vii) Administrative Agent is not Borrower's
Administrative Agent, but Administrative Agent for Lenders, (viii) should an
Event of Default or Default occur or exist, each Lender Party will determine in
its sole discretion and for its own reasons what remedies and actions it will or
will not exercise or take at that time, (ix) without limiting any of the
foregoing, Borrower is not relying upon any representation or covenant by any
Lender Party, or any representative thereof, and no such representation or
covenant has been made, that any Lender Party will, at the time of an Event of
Default or Default, or at any other time, waive, negotiate, discuss, or take or
refrain from taking any action permitted under the Loan Documents with respect
to any such Event of Default or Default or any other provision of the Loan
Documents, and (x) all Lender Parties have relied upon the truthfulness of the
acknowledgments in this section in deciding to execute and deliver this
Agreement and to become obligated hereunder.

     (c) Joint Acknowledgment. THIS WRITTEN AGREEMENT AND THE OTHER LOAN
DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES.

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           THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

     Section 10.2. Survival of Agreements; Cumulative Nature. All of Credit
Parties' various representations, warranties, covenants and agreements in the
Loan Documents shall survive the execution and delivery of this Agreement and
the other Loan Documents and the performance hereof and thereof, including the
making or granting of the Loans and the delivery of the Notes and the other Loan
Documents, and shall further survive until all of the Obligations are paid in
full to each Lender Party and all of Lender Parties' obligations to Borrower are
terminated. All statements and agreements contained in any certificate or other
instrument delivered by any Credit Party to any Lender Party under any Loan
Document shall be deemed representations and warranties by Borrower or
agreements and covenants of Borrower under this Agreement. The representations,
warranties, indemnities, and covenants made by Credit Parties in the Loan
Documents, and the rights, powers, and privileges granted to Lender Parties in
the Loan Documents, are cumulative, and, except for expressly specified waivers
and consents, no Loan Document shall be construed in the context of another to
diminish, nullify, or otherwise reduce the benefit to any Lender Party of any
such representation, warranty, indemnity, covenant, right, power or privilege.
In particular and without limitation, no exception set out in this Agreement to
any representation, warranty, indemnity, or covenant herein contained shall
apply to any similar representation, warranty, indemnity, or covenant contained
in any other Loan Document, and each such similar representation, warranty,
indemnity, or covenant shall be subject only to those exceptions which are
expressly made applicable to it by the terms of the various Loan Documents.

     Section 10.3. Notices; Effectiveness; Electronic Communication.

     (a) Notices Generally. Except in the case of notices and other
communications expressly permitted to be given by telephone (and except as
provided in 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 telecopier as
follows and all notices and other communications expressly permitted hereunder
to be given by telephone shall be made to the applicable telephone number, as
follows and all notices and other communications expressly permitted hereunder
to be given by telephone shall be made to the applicable telephone number, as
follows:

          (i) if to Borrower, Administrative Agent or LC Issuer, to the address,
     telecopier number, electronic mail address or telephone number specified
     for such person on the signature pages hereto;

          (ii) if to any other Lender Party, to it at its address, telecopier
     number, electronic mail address or telephone number as specified on the
     Lenders Schedule;

          (iii) if to any Guarantor, to the address, telecopier number,
     electronic mail address or telephone number specified for such person in
     its Guaranty, or if no address is given in the Guaranty, in care of
     Borrower.

Notices sent by hand or overnight courier service, or mailed by certified or
registered mail, shall be deemed to have been given when received; notices sent
by telecopier shall be deemed to have

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been given when sent (except that, if not given during normal business hours for
the recipient, shall be deemed to have been given at the opening of business on
the next business day for the recipient). Notices delivered through electronic
communications to the extent provided in paragraph (b) below, shall be effective
as provided in said paragraph (b).

     (b) Electronic Communications. Notices and other communications to the
Lenders hereunder may be delivered or furnished by electronic communication
(including e-mail and Internet or intranet websites) pursuant to procedures
approved by Administrative Agent, provided that the foregoing shall not apply to
notices to any Lender pursuant to Article II if such Lender, as applicable, has
notified Administrative Agent that it is incapable of receiving notices under
such Article by electronic communication. Administrative Agent or Borrower or
any other Credit Party 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.

     Unless Administrative Agent otherwise prescribes, (i) notices and other
communications sent to an e-mail address shall be deemed received upon the
sender's receipt of an acknowledgement from the intended recipient (such as by
the "return receipt requested" function, as available, return e-mail or other
written acknowledgement), provided that if such notice or other communication is
not sent during the normal business hours of the recipient, such notice or
communication shall be deemed to have been sent at the opening of business on
the next business day for the recipient, and (ii) notices or communications
posted to an Internet or intranet website shall be deemed received upon the
deemed receipt by the intended recipient at its e-mail address as described in
the foregoing clause (i) of notification that such notice or communication is
available and identifying the website address therefor.

     Borrower hereby acknowledges that (a) Administrative Agent will make
available to the Lenders Parties materials and/or information provided by or on
behalf of Borrower hereunder (collectively, "Borrower Materials") by posting the
Borrower Materials on IntraLinks or another similar electronic system (the
"Platform") and (b) certain of the Lenders may be "public-side" Lenders (i.e.,
Lenders that do not wish to receive material non-public information with respect
to the Borrower or its securities) (each, a "Public Lender"). Borrower hereby
agrees that (w) all Borrower Materials that are to be made available to Public
Lenders shall be clearly and conspicuously marked "PUBLIC" which, at a minimum,
shall mean that the word "PUBLIC" shall appear prominently on the first page
thereof; (x) by marking Borrower Materials "PUBLIC," the Borrower shall be
deemed to have authorized the Lender Parties to treat such Borrower Materials as
not containing any material non-public information with respect to the Borrower
or its securities for purposes of United States Federal and state securities
laws (provided, however, that to the extent such Borrower Materials constitute
Information, they shall be treated as set forth in Section 10.7); (y) all
Borrower Materials marked "PUBLIC" are permitted to be made available through a
portion of the Platform designated "Public Investor;" and (z) the Administrative
Agent and the Arranger shall be entitled to treat any Borrower Materials that
are not marked "PUBLIC" as being suitable only for posting on a portion of the
Platform not designated "Public Investor."

     (c) Change of Address, Etc. Each of Borrower, any other Credit Party,
Administrative Agent and LC Issuer may change its address, telecopier or
telephone number for

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notices and other communications hereunder by notice to the other parties
hereto. Each other Lender Party may change its address, telecopier or telephone
number for notices and other communications hereunder by notice to Borrower,
Administrative Agent and LC Issuer.

     Section 10.4. Expenses; Indemnity; Damage Waiver.

     (a) Costs and Expenses. Borrower shall pay (i) all reasonable out-of-pocket
expenses incurred by Administrative Agent and its Affiliates (including the
reasonable fees, charges and disbursements of counsel for Administrative Agent),
in connection with the syndication of the credit facilities provided for herein,
the preparation, negotiation, execution, delivery and administration of this
Agreement and the other Loan Documents or any amendments, modifications or
waivers of the provisions hereof or thereof (whether or not the transactions
contemplated hereby or thereby shall be consummated), (ii) all reasonable
out-of-pocket expenses incurred by LC Issuer in connection with the issuance,
amendment, renewal or extension of any Letter of Credit or any demand for
payment thereunder and (iii) all out-of-pocket expenses incurred by the
Administrative Agent, any Lender or LC Issuer (including the fees, charges and
disbursements of any counsel for Administrative Agent, any Lender or LC Issuer),
in connection with the enforcement or protection of its rights (A) in connection
with this Agreement and the other Loan Documents, including its rights under
this section, or (B) in connection with the Loans made or Letters of Credit
issued hereunder, including all such out-of-pocket expenses incurred during any
workout, restructuring or negotiations in respect of such Loans or Letters of
Credit.

     (b) Indemnification by Borrower. Borrower shall indemnify Administrative
Agent (and any sub-agent thereof), each Lender and LC Issuer, 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 fees,
charges and disbursements of any counsel for any Indemnitee), and shall
indemnify and hold harmless each Indemnitee from all fees and time charges and
disbursements for attorneys who may be employees of any Indemnitee, incurred by
any Indemnitee or asserted against any Indemnitee by any third party or by
Borrower or any other Credit Party arising out of, in connection with, or as a
result of (i) the execution or delivery of this Agreement, any other Loan
Document or any agreement or instrument contemplated hereby or thereby, the
performance by the parties hereto of their respective obligations hereunder or
thereunder or the consummation of the transactions contemplated hereby or
thereby, (ii) any Loan or Letter of Credit or the use or proposed use of the
proceeds therefrom (including any refusal by LC Issuer to honor a demand for
payment under a Letter of Credit if the documents presented in connection with
such demand do not strictly comply with the terms of such Letter of Credit),
(iii) any actual or alleged presence or release or discharge of Hazardous
Materials on or from any property owned or operated by Borrower or any of its
Subsidiaries, or any Environmental Liability related in any way to Borrower or
any Credit Party, 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, whether brought by a third party or by
Borrower or any other Credit Party, and regardless of whether any Indemnitee is
a party thereto. THE FOREGOING INDEMNIFICATION WILL APPLY WHETHER OR NOT SUCH
LIABILITIES AND COSTS ARE IN ANY WAY OR TO ANY EXTENT OWED, IN WHOLE OR IN PART,
UNDER ANY CLAIM OR THEORY OF STRICT LIABILITY OR CAUSED, IN

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WHOLE OR IN PART BY ANY NEGLIGENT ACT OR OMISSION OF ANY KIND BY ANY INDEMNITEE,
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 or willful misconduct of
such Indemnitee or if Borrower or such Credit Party has obtained a final and
nonappealable judgment in its favor on such claim as determined by a court of
competent jurisdiction.

     (c) Reimbursement by Lenders. To the extent that Borrower for any reason
fails to indefeasibly pay any amount required under paragraph (a) or (b) of this
Section to be paid by it to Administrative Agent (or any sub-agent thereof), LC
Issuer or any Related Party of any of the foregoing, each Lender severally
agrees to pay to Administrative Agent (or any such sub-agent), LC Issuer or such
Related Party, as the case may be, such Lender's Percentage share (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 Administrative Agent (or any such
sub-agent) or LC Issuer in its capacity as such, or against any Related Party of
any of the foregoing acting for Administrative Agent (or any such sub-agent) or
LC Issuer in connection with such capacity. The obligations of the Lenders under
this paragraph (c) are subject to the provisions of Section 2.17.

     (d) Waiver of Consequential Damages, Etc. To the fullest extent permitted
by applicable law, 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, any other
Loan Document or any agreement or instrument contemplated hereby, the
transactions contemplated hereby or thereby, any Loan or Letter of Credit or the
use of the proceeds thereof. No Indemnitee referred to in paragraph (b) above
shall be liable for any damages arising from the use by unintended recipients of
any information or other materials distributed by it through telecommunications,
electronic or other information transmission systems in connection with this
Agreement or the other Loan Documents or the transactions contemplated hereby or
thereby.

     (e) Payments. All amounts due under this Section shall be payable not later
than ten (10) days after demand therefor.

     Section 10.5. Successors and Assigns; Joint and Several Liability.

     (a) Successors and Assigns Generally. 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 neither Borrower
nor any other Credit Party may assign or otherwise transfer any of its rights or
obligations hereunder without the prior written consent of Administrative Agent
and each Lender and no Lender may assign or otherwise transfer any of its rights
or obligations hereunder except (i) to an Eligible Assignee in accordance with
the provisions of paragraph (b) of this Section, (ii) by way of participation in
accordance with the provisions of paragraph (d) of this Section or (iii) by way
of pledge or assignment of a security interest subject to the restrictions of
paragraph (f) of this Section (and any other attempted assignment or transfer by
any party hereto shall be null and void). Nothing in this Agreement,

                                       86

<PAGE>

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 (d) of this Section and, to the
extent expressly contemplated hereby, the Related Parties of each of
Administrative Agent and the Lenders) any legal or equitable right, remedy or
claim under or by reason of this Agreement.

     (b) Assignments by Lenders. Any Lender may at any time assign to one or
more Eligible Assignees all or a portion of its rights and obligations under
this Agreement and the other Loan Documents (including all or a portion of its
commitment and the Loans at the time owing to it); provided that

          (i) except in the case of an assignment of the entire remaining amount
     of the assigning Lender's commitment and the Loans at the time owing to it
     or in the case of an assignment to a Lender or an Affiliate of a Lender or
     an Approved Fund with respect to a Lender, the aggregate amount of the
     Commitment (which for this purpose includes Loans outstanding thereunder)
     or, if the applicable Commitment is not then in effect, the principal
     outstanding balance of the 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 Administrative Agent or, if
     "Trade Date" is specified in the Assignment and Assumption, as of the Trade
     Date) shall not be less than $5,000,000, unless each of Administrative
     Agent and, so long as no Event of Default has occurred and is continuing,
     Borrower otherwise consents (each such consent not to be unreasonably
     conditioned, withheld or delayed);

          (ii) 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 with respect to the Loan or the commitment assigned;

          (iii) any assignment of a Commitment must be approved by LC Issuer
     unless the Person that is the proposed assignee is itself a Lender with a
     Commitment (whether or not the proposed assignee would otherwise qualify as
     an Eligible Assignee); and

          (iv) the parties to each assignment shall execute and deliver to
     Administrative Agent an Assignment and Assumption, together with the Note
     subject to such assignment and a processing and recordation fee of $3,500,
     and the Eligible Assignee, if it shall not be a Lender, shall deliver to
     Administrative Agent an Administrative Questionnaire.

Subject to acceptance and recording thereof by Administrative Agent pursuant to
paragraph (c) of this Section, from and after the effective date specified in
each Assignment and Assumption, the Eligible Assignee thereunder shall be a
party to this Agreement 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 3.2, 3.4, 3.5 and 10.4 with respect
to facts and circumstances occurring prior to the effective date of such
assignment. Any

                                       87

<PAGE>

assignment or transfer by a Lender of rights or obligations under this Agreement
that does not comply with this paragraph 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 (d) of this Section.

     (c) Register. Administrative Agent, acting solely 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 commitments of, and principal
amounts of the Loans owing to, each Lender pursuant to the terms hereof from
time to time (the "Register"). The entries in the Register shall be conclusive,
and Borrower, 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 Borrower and any
Lender, at any reasonable time and from time to time upon reasonable prior
notice.

     (d) Participations. Any Lender may at any time, without the consent of, or
notice to, Borrower or Administrative Agent, sell participations to any Person
(other than a natural person or Borrower or any of Borrower's Affiliates or
Subsidiaries) (each, a "Participant") in all or a portion of such Lender's
rights and/or obligations under this Agreement (including all or a portion of
its commitment and/or the Loans owing to it); provided that (i) such Lender's
obligations under this Agreement shall remain unchanged, (ii) such Lender shall
remain solely responsible to the other parties hereto for the performance of
such obligations and (iii) Borrower, and the Lenders Parties 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 fifth sentence of Section 10.1(a) that affects such
Participant. Subject to paragraph (e) of this Section, the Borrower agrees that
each Participant shall be entitled to the benefits of Sections 3.2, 3.4 and 3.5
to the same extent as if it were a Lender and had acquired its interest by
assignment pursuant to paragraph (b) of this section. To the extent permitted by
law, each Participant also shall be entitled to the benefits of Section 6.14 as
though it were a Lender, provided such Participant agrees to be subject to
Section 9.5 as though it were a Lender.

     (e) Limitations upon Participant Rights. A Participant shall not be
entitled to receive any greater payment under Sections 3.2 and 3.5 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 3.5 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 3.5(e) as though it were a
Lender. Each Participant shall be subject to Section 3.7(b) and shall be
required to sell its participation pursuant thereto, as if it were a Lender
holding a direct interest in this Agreement.

                                       88

<PAGE>

     (f) Certain Pledges. 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 any pledge or assignment to secure
obligations to a Federal Reserve Bank; provided that no such pledge or
assignment shall release such Lender from any of its obligations hereunder or
substitute any such pledgee or assignee for such Lender as a party hereto.

     (g) Joint and Several Liability. All Obligations which are incurred by two
or more Credit Parties shall be their joint and several obligations and
liabilities.

     Section 10.6. Confidentiality. Each of the Lender Parties agrees to
maintain the confidentiality of the Information (as defined below), except that
Information may be disclosed (a) to its Affiliates and to its and its
Affiliates' respective partners, directors, officers, employees, agents,
advisors and other representatives (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 regulatory authority purporting to have jurisdiction
over it (including any self-regulatory authority, such as the National
Association of Insurance Commissioners), (c) to the extent required by
applicable laws or regulations or by any subpoena or similar legal process, (d)
to any other party hereto, (e) in connection with the exercise of any remedies
hereunder or under any other Loan Document or any action or proceeding relating
to this Agreement or any other Loan Document or the enforcement of rights
hereunder or thereunder, (f) subject to an agreement containing provisions
substantially the same as those of this Section, 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 or (ii) any actual or prospective
counterparty (or its advisors) to any swap or derivative transaction relating to
Borrower and its obligations, (g) with the consent of Borrower or (h) to the
extent such Information (x) becomes publicly available other than as a result of
a breach of this Section or (y) becomes available to such Lender Party or any of
its Affiliates on a nonconfidential basis from a source other than a Credit
Party.

     For purposes of this Section, "Information" means all information received
from Borrower or any of its Subsidiaries relating to Borrower or any of its
Subsidiaries or any of their respective businesses, other than any such
information that is available to a Lender Party on a nonconfidential basis prior
to disclosure by Borrower or any of its Subsidiaries, provided that, in the case
of information received from Borrower or any of its Subsidiaries after the date
hereof, such information is clearly identified at the time of delivery as
confidential. Any Person required to maintain the confidentiality of Information
as provided in this Section shall be considered to have complied with its
obligation to do so if such Person has exercised the same degree of care to
maintain the confidentiality of such Information as such Person would accord to
its own confidential information.

     Section 10.7. Governing Law; Submission to Process.

     (a) GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                                       89

<PAGE>

     (b) SUBMISSION TO JURISDICTION. BORROWER AND EACH OTHER CREDIT PARTY
IRREVOCABLY AND UNCONDITIONALLY SUBMITS, FOR ITSELF AND ITS PROPERTY, TO THE
NONEXCLUSIVE JURISDICTION OF THE COURTS OF THE STATE OF NEW YORK SITTING IN NEW
YORK COUNTY AND OF THE UNITED STATES DISTRICT COURT OF THE SOUTHERN DISTRICT OF
NEW YORK, AND ANY APPELLATE COURT FROM ANY THEREOF, IN ANY ACTION OR PROCEEDING
ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OTHER LOAN DOCUMENT, OR FOR
RECOGNITION OR ENFORCEMENT OF ANY JUDGMENT, AND EACH OF THE PARTIES HERETO
IRREVOCABLY AND UNCONDITIONALLY AGREES THAT ALL CLAIMS IN RESPECT OF ANY SUCH
ACTION OR PROCEEDING MAY BE HEARD AND DETERMINED IN SUCH NEW YORK STATE COURT
OR, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, IN SUCH FEDERAL COURT.
EACH OF THE PARTIES HERETO AGREES THAT A FINAL JUDGMENT IN ANY SUCH ACTION OR
PROCEEDING SHALL BE CONCLUSIVE AND MAY BE ENFORCED IN OTHER JURISDICTIONS BY
SUIT ON THE JUDGMENT OR IN ANY OTHER MANNER PROVIDED BY LAW. NOTHING IN THIS
AGREEMENT OR IN ANY OTHER LOAN DOCUMENT SHALL AFFECT ANY RIGHT THAT
ADMINISTRATIVE AGENT, ANY LENDER OR LC ISSUER MAY OTHERWISE HAVE TO BRING ANY
ACTION OR PROCEEDING RELATING TO THIS AGREEMENT OR ANY OTHER LOAN DOCUMENT
AGAINST BORROWER OR ANY OTHER CREDIT PARTY OR ITS PROPERTIES IN THE COURTS OF
ANY JURISDICTION.

     (c) WAIVER OF VENUE. BORROWER AND EACH OTHER CREDIT PARTY IRREVOCABLY AND
UNCONDITIONALLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY
OBJECTION THAT IT MAY NOW OR HEREAFTER HAVE TO THE LAYING OF VENUE OF ANY ACTION
OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OTHER LOAN
DOCUMENT IN ANY COURT REFERRED TO IN PARAGRAPH (B) OF THIS SECTION. EACH OF THE
PARTIES HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY
APPLICABLE LAW, THE DEFENSE OF AN INCONVENIENT FORUM TO THE MAINTENANCE OF SUCH
ACTION OR PROCEEDING IN ANY SUCH COURT.

     (d) SERVICE OF PROCESS. EACH PARTY HERETO IRREVOCABLY CONSENTS TO SERVICE
OF PROCESS IN THE MANNER PROVIDED FOR NOTICES IN SECTION 10.3. NOTHING IN THIS
AGREEMENT WILL AFFECT THE RIGHT OF ANY PARTY HERETO TO SERVE PROCESS IN ANY
OTHER MANNER PERMITTED BY APPLICABLE LAW.

     Section 10.8. Limitation on Interest. Lender Parties, Credit Parties and
the other parties to the Loan Documents intend to contract in strict compliance
with applicable usury Law from time to time in effect. In furtherance thereof
such persons stipulate and agree that none of the terms and provisions contained
in the Loan Documents shall ever be construed to provide for interest in excess
of the maximum amount of interest permitted to be contracted for, charged, or
received by applicable Law from time to time in effect. Neither any Credit Party
nor any present

                                       90

<PAGE>

or future guarantors, endorsers, or other Persons hereafter becoming liable for
payment of any Obligation shall ever be liable for unearned interest thereon or
shall ever be required to pay interest thereon in excess of the maximum amount
that may be lawfully contracted for, charged, or received under applicable Law
from time to time in effect, and the provisions of this section shall control
over all other provisions of the Loan Documents which may be in conflict or
apparent conflict herewith.

     Section 10.9. Termination; Limited Survival. In its sole and absolute
discretion Borrower may at any time that no Obligations or Lender Hedging
Obligations are owing (other than indemnity obligations and similar obligations
that survive the termination of this Agreement for which no notice of a claim
has been received by Borrower) elect in a written notice delivered to
Administrative Agent to terminate this Agreement. Upon receipt by Administrative
Agent of such a notice, if no such Obligations or Lender Hedging Obligations are
then owing this Agreement and all other Loan Documents shall thereupon be
terminated and the parties thereto released from all prospective obligations
thereunder. Notwithstanding the foregoing or anything herein to the contrary,
any waivers or admissions made by any Credit Party in any Loan Document, any
Obligations under Sections 3.2 through Section 3.6, and any obligations which
any Person may have to indemnify or compensate any Lender Party shall survive
any termination of this Agreement or any other Loan Document. At the request and
expense of Borrower, Administrative Agent shall prepare and execute all
necessary instruments to reflect and effect such termination of the Loan
Documents. Administrative Agent is hereby irrevocably authorized to execute all
such instruments (as well as any release referred to in clauses (6) or (7) of
Section 10.1(a)) on behalf of all Lenders, without the joinder of or further
action by any Lender.

     Section 10.10. Severability. If any term or provision of any Loan Document
shall be determined to be illegal or unenforceable all other terms and
provisions of the Loan Documents shall nevertheless remain effective and shall
be enforced to the fullest extent permitted by applicable Law.

     Section 10.11. Counterparts; Integration; Effectiveness. This Agreement may
be executed in counterparts (and by different parties hereto in different
counterparts), each of which shall constitute an original, but all of which when
taken together shall constitute a single contract. This Agreement and the other
Loan Documents, and any separate letter agreements with respect to fees payable
to 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 4.1, this Agreement shall become effective
when it shall have been executed by Administrative Agent and when Administrative
Agent shall have received counterparts hereof that, when taken together, bear
the signatures of each of the other parties hereto. 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 10.12. Waiver of Jury Trial, Punitive Damages, etc. EACH PARTY
HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW, (A) ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING
DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OTHER
LOAN DOCUMENT OR THE

                                       91

<PAGE>

TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY (WHETHER BASED ON CONTRACT, TORT OR
ANY OTHER THEORY, AND (B) ANY RIGHT IT MAY HAVE TO CLAIM OR RECOVER IN ANY SUCH
LEGAL PROCEEDING ANY "SPECIAL DAMAGES," AS DEFINED BELOW. EACH PARTY HERETO (X)
CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PERSON HAS
REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PERSON WOULD NOT, IN THE
EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (Y) ACKNOWLEDGES
THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS
AGREEMENT AND THE OTHER LOAN DOCUMENTS BY, AMONG OTHER THINGS, THE MUTUAL
WAIVERS AND CERTIFICATIONS IN THIS SECTION. AS USED IN THIS SECTION, "SPECIAL
DAMAGES" INCLUDES ALL SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES
(REGARDLESS OF HOW NAMED), BUT DOES NOT INCLUDE ANY PAYMENTS OR FUNDS WHICH ANY
PARTY HERETO HAS EXPRESSLY PROMISED TO PAY OR DELIVER TO ANY OTHER PARTY HERETO.

     Section 10.13. USA PATRIOT Act Notice. Each Lender Party that is subject to
the Act (as hereinafter defined) hereby notifies 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 Borrower, which information includes the name and
address of Borrower and other information that will allow such Lender Party or
Administrative Agent, as applicable, to identify Borrower in accordance with the
Act.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.]

                                       92

<PAGE>

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

                                        AREP OIL & GAS LLC,
                                        Borrower

                                        By: /s/ Philip D. Devlin
                                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

                                        Address:
                                        1400 One Energy Square
                                        4925 Greenville Avenue
                                        Dallas, TX 75206

                                        Attention: Philip D. Devlin

                                        Telephone: (214) 692-9211
                                        Fax:       (214) 692-5055

<PAGE>

                                        CITICORP USA, INC.,
                                        Administrative Agent, LC Issuer
                                        and Lender

                                        By: /s/ David E. Hunt
                                            ------------------------------------
                                        Name: David E. Hunt
                                        Title: Vice President

                                        Address:
                                        388 Greenwich Street
                                        New York, NY 10013

                                        Attention: David E. Hunt

                                        Telephone: (713) 654-2829
                                        Fax:       (713) 654-2849

<PAGE>

                                        CITIBANK, N.A., as LC Issuer

                                        By: /s/ David E. Hunt
                                            ------------------------------------
                                        Name: David E. Hunt
                                        Title: Vice President

                                        Address:
                                        388 Greenwich Street
                                        New York, NY 10013

                                        Attention: David E. Hunt

                                        Telephone: (713) 654-2829
                                        Fax:       (713) 654-2849

<PAGE>

                                        BEAR STEARNS CORPORATE LENDING INC.,
                                        Syndication Agent and Lender

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

                                        Address:
                                        Bear, Stearns & Co. Inc.
                                        383 Madison Avenue, 8th Floor
                                        New York, NY 10179

                                        Attention: Bryan J. Carter Jr.

                                        Telephone: (212) 272-0219
                                        Fax:       (212) 272-9184

<PAGE>

                                        ALLIED IRISH BANKS P.L.C., Lender

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

                                        Address:
                                        AIB Corporate Banking
                                        405 Park Avenue, 4th Floor
                                        New York, NY 10022

                                        Attention: Mark Connelly
                                        Telephone: (212) 515-6773
                                        Fax:       (212) 339-8325

<PAGE>

                                        AMEGY BANK N.A., Lender

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

                                        Address:
                                        1807 Ross Avenue, 4th Floor
                                        Dallas, TX 75201

                                        Attention: Tim Merrell

                                        Telephone: (214) 754-6033
                                        Fax:       (214) 754-9687

<PAGE>

                                        BANK OF TEXAS, N.A., Lender

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

                                        Address:
                                        1401 McKinney, Suite 1650
                                        Houston, TX 77010

                                        Attention: Mari Salazar

                                        Telephone: (713) 289-5813
                                        Fax:       (713) 289-5825

<PAGE>

                                        MALAYAN BANKING BERHAD, NY BRANCH,
                                        Lender

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

                                        Address:
                                        400 Park Avenue, 9th Floor
                                        New York, NY 10022

                                        Attention: Nor Akmar Wallace

                                        Telephone: (212) 303-1319
                                        Fax:       (212) 308-0109

<PAGE>

                                        MIZUHO CORPORATE BANK, LTD., Lender

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

                                        Address:
                                        1251 Avenue of the Americas
                                        New York, NY 10020

                                        Attention: Leon Mo

                                        Telephone: (212) 282-4984
                                        Fax:       (212) 282-4488

<PAGE>

                                        REGIONS BANK, Lender

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

                                        Address:
                                        5005 Woodway, Suite 110
                                        Houston, TX 77056

                                        Attention: Gardner Cannon

                                        Telephone: (713) 426-7142
                                        Fax:       (713) 426-7180

<PAGE>

                                        THE BANK OF NOVA SCOTIA, Lender

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

                                        Address:
                                        1100 Louisiana, Suite 3000
                                        Houston, TX 77002

                                        Attention: Mike Roberts

                                        Telephone: (713) 759-3449
                                        Fax:       (713) 752-2425

<PAGE>

                                        WESTLB AG, NY BRANCH, Lender

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

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

                                        Address:
                                        1211 Avenue of the Americas
                                        New York, NY 10036

                                        Attention: Duncan Robertson

                                        Telephone: (212) 852-6107
                                        Fax:       (212) 597-1157

<PAGE>

                                                                       EXHIBIT A

                             FORM OF PROMISSORY NOTE

$______________                                             *[December __, 2005]

     FOR VALUE RECEIVED, the undersigned, AREP OIL & GAS LLC, a Delaware limited
liability company ("Borrower"), hereby promises to pay to the order of
______________________________________ ("Lender"), the principal sum of
________________ Dollars ($_________), or, if greater or less, the aggregate
unpaid principal amount of the Loans made by Lender to Borrower pursuant to the
terms of the Credit Agreement (as hereinafter defined), together with interest
on the unpaid principal balance thereof as set forth in the Credit Agreement,
both principal and interest payable as herein provided in lawful money of the
United States of America at the offices of Administrative Agent under the Credit
Agreement, or at such other place as from time to time may be designated by the
holder of this Note.

     This Note (a) is issued and delivered under that certain Credit Agreement
dated *[December __, 2005] among Borrower, Citicorp USA, Inc., as Administrative
Agent, Bear Stearns Corporate Lending Inc., as Syndication Agent, and the
lenders (including Lender) referred to therein (as from time to time
supplemented, amended or restated, the "Credit Agreement"), and is a "Note" as
defined therein, (b) is subject to the terms and provisions of the Credit
Agreement, which contains provisions for payments and prepayments hereunder and
acceleration of the maturity hereof upon the happening of certain stated events,
and (c) is secured by and entitled to the benefits of certain Security Documents
(as identified and defined in the Credit Agreement). Payments on this Note shall
be made and applied as provided in the Credit Agreement. Reference is hereby
made to the Credit Agreement for a description of certain rights, limitations of
rights, obligations and duties of the parties hereto and for the meanings
assigned to terms used and not defined herein and to the Security Documents for
a description of the nature and extent of the security thereby provided and the
rights of the parties thereto.

     The principal amount of this Note, together with all interest accrued
hereon, shall be due and payable in full on the Maturity Date.

     Notwithstanding the foregoing paragraph and all other provisions of this
Note, in no event shall the interest payable hereon, whether before or after
maturity, exceed the maximum interest which, under applicable Law, may be
contracted for, charged, or received on this Note, and this Note is expressly
made subject to the provisions of the Credit Agreement which more fully set out
the limitations on how interest accrues hereon.

     If this Note is placed in the hands of an attorney for collection after
default, or if all or any part of the indebtedness represented hereby is proved,
established or collected in any court or in any bankruptcy, receivership, debtor
relief, probate or other court proceedings, Borrower and all endorsers, sureties
and guarantors of this Note jointly and severally agree to pay reasonable
attorneys' fees and collection costs to the holder hereof in addition to the
principal and interest

                                   EXHIBIT A-1

<PAGE>

payable hereunder, in each case, in accordance with the terms and conditions set
forth in the Credit Agreement.

     Borrower and all endorsers, sureties and guarantors of this Note hereby
severally waive demand, presentment, notice of demand and of dishonor and
nonpayment of this Note, protest, notice of protest, notice of intention to
accelerate the maturity of this Note, declaration or notice of acceleration of
the maturity of this Note, diligence in collecting, the bringing of any suit
against any party and any notice of or defense on account of any extensions,
renewals, partial payments or changes in any manner of or in this Note or in any
of its terms, provisions and covenants, or any releases or substitutions of any
security, or any delay, indulgence or other act of any trustee or any holder
hereof, whether before or after maturity.

     This Note and the rights and duties of the parties hereto shall be governed
by the Laws of the State of New York (without regard to principles of conflicts
of law), except to the extent the same are governed by applicable federal Law.

                                        AREP OIL & GAS LLC

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

                                   EXHIBIT A-2

<PAGE>

                                                                       EXHIBIT B

                            FORM OF BORROWING NOTICE

     Reference is made to that certain Credit Agreement dated as of *[December
__, 2005] (as amended or supplemented, the "Agreement"), by and among AREP Oil &
Gas LLC ("Borrower"), Citicorp USA, Inc., as Administrative Agent, Bear Stearns
Corporate Lending Inc., as Syndication Agent, and certain financial institutions
("Lenders"). Terms which are defined in the Agreement are used herein with the
meanings given them in the Agreement. Borrower hereby requests a Borrowing of
new Loans to be advanced pursuant to Section 2.1 of the Agreement as follows:

<TABLE>
<S>                                              <C>
Aggregate amount of Borrowing:                   $_________________

Type of Loans in Borrowing:                      __________________

Date on which Loans are to be advanced:          __________________

Length of Interest Period for Eurodollar Loans
(1, 2, 3 or 6 months):                           ___________ months

If combined with existing Loans see attached
Continuation/Conversion Notice.
</TABLE>

     To induce Lenders to make such Loans, Borrower hereby represents, warrants,
acknowledges, and agrees to and with Administrative Agent and each Lender that:

     The officer of Borrower signing this instrument is the duly elected,
qualified and acting officer of Borrower as indicated below such officer's
signature hereto having all necessary authority to act for Borrower in making
the request herein contained.

     (a) The representations and warranties of each Credit Party set forth in
the Agreement and the other Loan Documents are true and correct in all respects
on and as of the date hereof, except for any such representation or warranty
specifically refers to an earlier date, in which case such representation or
warranty shall have been true in all respects on and as of such earlier date.

     (b) No Default exists on the date hereof, both before and after giving
effect to the making of the Loan requested hereby.

     (c) No Material Adverse Change has occurred, and no event or circumstance
has occurred that would reasonably be anticipated to cause a Material Adverse
Change since the date of the Initial Financial Statements.

                                   EXHIBIT B-1

<PAGE>

     The officer of Borrower signing this instrument hereby certifies that, to
the best of his knowledge after due inquiry, the above representations,
warranties, acknowledgments, and agreements of Borrower are true, correct and
complete.

     IN WITNESS WHEREOF, this instrument is executed as of ____________, 20__.

                                        AREP OIL & GAS LLC

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

                                   EXHIBIT B-2

<PAGE>

                                                                       EXHIBIT C

                     FORM OF CONTINUATION/CONVERSION NOTICE

     Reference is made to that certain Credit Agreement dated as of *[December
__, 2005] (as amended or supplemented, the "Agreement"), by and among AREP Oil &
Gas LLC ("Borrower"), Citicorp USA, Inc., as Administrative Agent, Bear Stearns
Corporate Lending Inc., as Syndication Agent, and the lenders referred to
therein ("Lenders"). Terms which are defined in the Agreement are used herein
with the meanings given them in the Agreement.

     Borrower hereby requests a Conversion or Continuation of existing Loans
into a new Borrowing pursuant to Section 2.3 of the Agreement as follows:

     Existing Borrowing(s) to be continued or converted:

          $____________ of Eurodollar Loans with Interest Period ending
_____________.

          $____________ of Base Rate Loans

          If being combined with new Loans, $____________ of new Loans to be
advanced on ____________

<TABLE>
<S>                                              <C>
Aggregate amount of Borrowing:                   $_________________

Type of Loans in new Borrowing:                  __________________

Date of Continuation or Conversion:              __________________

Length of Interest Period for Eurodollar Loans
(1, 2, 3 or 6 months):                           ___________ months
</TABLE>

     To meet the conditions set out in the Agreement for such
conversion/continuation, Borrower hereby represents, warrants, acknowledges, and
agrees to and with Administrative Agent and each Lender that:

     The officer of Borrower signing this instrument is the duly elected,
qualified and acting officer of Borrower as indicated below such officer's
signature hereto having all necessary authority to act for Borrower in making
the request contained herein.

     (a) The representations and warranties of each Credit Party set forth in
the Agreement and the other Loan Documents are true and correct in all respects
on and as of the date hereof, except for any such representation or warranty
specifically refers to an earlier date, in which case such representation or
warranty shall have been true in all respects on and as of such earlier date.

                                   EXHIBIT C-1

<PAGE>

     (b) No Default exists on the date hereof, both before and after giving
effect to the making of the Loan requested hereby.

     (c) No Material Adverse Change has occurred, and no event or circumstance
has occurred that would reasonably be anticipated to cause a Material Adverse
Change since the date of the Initial Financial Statements.

     The officer of Borrower signing this instrument hereby certifies that, to
the best of his knowledge after due inquiry, the above representations,
warranties, acknowledgments, and agreements of Borrower are true, correct and
complete.

     IN WITNESS WHEREOF this instrument is executed as of ___________, 20__.

                                        AREP OIL & GAS LLC

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

                                   EXHIBIT C-2

<PAGE>

                                                                       EXHIBIT D

                        FORM OF CERTIFICATE ACCOMPANYING
                              FINANCIAL STATEMENTS

     Reference is made to that certain Credit Agreement dated as of *[December
__, 2005] (as amended or supplemented, the "Agreement"), by and among AREP Oil &
Gas LLC ("Borrower"), Citicorp USA, Inc., as Administrative Agent, Bear Stearns
Corporate Lending Inc., as Syndication Agent, and certain financial institutions
("Lenders"), which Agreement is in full force and effect on the date hereof.
Terms which are defined in the Agreement are used herein with the meanings given
them in the Agreement.

     This Certificate is furnished pursuant to Section 6.2(d) of the Agreement.
Together herewith Borrower is furnishing to Administrative Agent Borrower's
financial statements (the "Financial Statements") as at ____________ (the
"Reporting Date"). Borrower hereby represents, warrants, and acknowledges to
Administrative Agent and each Lender that:

     (a) the officer of Borrower signing this instrument is the duly elected,
qualified and acting ____________ of Borrower and as such is Borrower's chief
financial officer;

     (b) the Financial Statements are accurate and complete and satisfy the
requirements of the Agreement;

     (c) attached hereto is a schedule of calculations showing Borrower's
compliance as of the Reporting Date with the requirements of Sections [7.1, 7.3,
7.6 and 7.11] of the Agreement [and Borrower's non-compliance as of such date
with the requirements of Section(s) [7.1, 7.3, 7.6 and 7.11] of the Agreement];

     (d) on the Reporting Date Borrower was, and on the date hereof Borrower is,
in full compliance with the requirements of Section 6.17 of the Agreement, and
no Default or Internal Control Event otherwise existed on the Reporting Date or
otherwise exists on the date of this instrument *[except as described on a
schedule attached hereto].

     (e) *[Unless otherwise disclosed on a schedule attached hereto,] The
representations and warranties of each Credit Party set forth in the Agreement
and the other Loan Documents are true and correct in all respects on and as of
the date hereof, except for any such representation or warranty specifically
refers to an earlier date, in which case such representation or warranty shall
have been true in all respects on and as of such earlier date.

     The officer of Borrower signing this instrument hereby certifies that he
has reviewed the Loan Documents and the Financial Statements and has otherwise
undertaken such inquiry as is in his opinion necessary to enable him to express
an informed opinion with respect to the above representations, warranties and
acknowledgments of Borrower and, to the best of his knowledge, such
representations, warranties, and acknowledgments are true, correct and complete.

                                   EXHIBIT D-1

<PAGE>

     IN WITNESS WHEREOF, this instrument is executed as of ____________, 20__.

                                        AREP OIL & GAS LLC

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

                                   EXHIBIT D-2

<PAGE>

                                                                       EXHIBIT E

                            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 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
Administrative Agent as contemplated below (i) all of the Assignor's rights and
obligations 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 (including, without limitation, any letters
of credit 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, but not limited to, 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]]

3. Borrower(s):          AREP OIL & GAS LLC

4. Administrative Agent: CITICORP USA, INC., as the administrative agent under
                         the Credit Agreement

5. Credit Agreement:     The Credit Agreement dated as of *[December __, 2005]
                         among AREP Oil & Gas LLC, the Lenders from time to
                         time party thereto, Citicorp USA, Inc., as
                         Administrative Agent, and the other agents parties
                         thereto.

6. Assigned Interest:    _______________________________

                                   EXHIBIT E-1

<PAGE>

<TABLE>
<CAPTION>
   AGGREGATE AMOUNT OF                                     PERCENTAGE
COMMITMENT/LOANS FOR ALL   AMOUNT OF COMMITMENT/LOANS      ASSIGNED OF
         LENDERS                    ASSIGNED            COMMITMENT/LOANS
------------------------   --------------------------   ----------------
<S>                        <C>                          <C>
            $                           $                       %
            $                           $                       %
            $                           $                       %
</TABLE>

7. [Trade Date: _______________________________]

                                   EXHIBIT E-2

<PAGE>

     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:
                                               ---------------------------------

[Consented to and] Accepted:

CITICORP USA, INC., as
Administrative Agent

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

[Consented to]:

[NAME OF BORROWER OR OTHER CONSENTING
PARTY]

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

                                   EXHIBIT E-3

<PAGE>

                                            ANNEX 1 to Assignment and Assumption

                          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 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
meets all requirements of an Eligible Assignee under the Credit Agreement
(subject to receipt of such consents as may be required under 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 6.2 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 Administrative Agent or any
other Lender, and (v) if it is a Foreign Lender, 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
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 that 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, 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 that
have accrued to but excluding the Effective Date and to the Assignee for amounts
that have accrued from and after the Effective Date.

                                   EXHIBIT E-4

<PAGE>

     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 laws of the State of New York.

                                   EXHIBIT E-5

<PAGE>

                                                                       EXHIBIT F

                          LETTER OF CREDIT APPLICATION

                                   EXHIBIT F-1

<PAGE>

                                                                       EXHIBIT G

                      FORM OF COMMITMENT INCREASE AGREEMENT

     THIS COMMITMENT INCREASE AGREEMENT is made as of the ___ day of _______,
20__, by and among AREP OIL & GAS LLC, a Delaware limited liability company (the
"BORROWER"), CITICORP USA, INC., as administrative agent (in such capacity, the
"ADMINISTRATIVE AGENT"), and the parties signatory hereto as the Increasing
Lenders and the New Lenders.

                                    RECITALS

     Borrower, Administrative Agent, Bear Stearns Corporate Lending Inc., as
Syndication Agent, and the Lenders party thereto ("LENDERS") have entered into
that certain Credit Agreement dated as of December __, 2005 (as heretofore
amended, supplemented, modified, or restated, the "CREDIT AGREEMENT"). All terms
used herein and not otherwise defined shall have the same meaning given to them
in the Credit Agreement.

     Pursuant to Section 2.17 of the Credit Agreement, Borrower and
Administrative Agent, without any further consent of any of the Lenders, have
the right, in the event that the Lenders designate a Borrowing Base in excess of
the Aggregate Commitment then in effect, to cause an increase in the Aggregate
Commitment by adding to the Credit Agreement one or more financial institutions
as Lenders (such financial institutions being referred to herein as "NEW
LENDERS" and each such financial institution a "NEW LENDEr") or by allowing one
or more Lenders to increase their respective Commitments (such Lenders being
referred to herein as "INCREASING LENDERS" and each such Lender an "INCREASING
LENDER"); provided however that each of the conditions to such increase in
Section 2.17 of the Credit Agreement shall have occurred and been complied with
as of the Increase Effective Date (as defined below).

                                    AGREEMENT

     1. Borrower, Administrative Agent, the parties signatory hereto as
Increasing Lenders or as New Lenders hereby agree that from and after the date
hereof, Increasing Lenders and New Lenders shall have the respective Commitments
as set forth on the attached Supplement to Schedule 1. By its execution and
delivery of this Commitment Increase Agreement, each New Lender hereby assumes
all of the rights and obligations of a Lender under the Credit Agreement. Such
Commitment of each New Lender and the increase in the Commitments of each
Increasing Lenders shall represent an increase in the Aggregate Commitments
pursuant to Section 2.17 of the Credit Agreement.

     2. Administrative Agent hereby consents to and approves the Commitment of
each New Lender and the increase in the Commitment of each Increasing Lender and
such resulting increase in the Aggregate Commitments pursuant to Section 2.17 of
the Credit Agreement.

     3. This Commitment Increase Agreement shall be effective on the date (the
"INCREASE EFFECTIVE DATE") that (i) Borrower and each New Lender and each
Increasing Lender

                                   EXHIBIT G-1

<PAGE>

execute a counterpart hereof and delivers the same to Administrative Agent, (ii)
Administrative Agent executes a counterpart hereof, and (iii) each of the
conditions to the increase in the Commitment in Section 2.17 of the Credit
Agreement shall have occurred.

     4. Borrower (i) represents and warrants that, as of the Increase Effective
Date, the representations and warranties contained in the Credit Agreement and
the other Loan Documents are true and correct in all respects on and as of the
Increase Effective Date after giving effect to such increase, except as to the
extent that such representations and warranties specifically refer to an earlier
date, in which case they were true and correct in all material respects as of
such earlier date, and no Default or Event of Default exists, (ii) ratifies and
confirms each of the Loan Documents to which it is a party, (iii) agrees that
all Loan Documents shall apply to the Obligations as they are increased by this
Commitment Increase Agreement, and (iv) agrees that its obligations and
covenants under each Loan Document are otherwise unimpaired hereby and shall
remain in full force and effect.

     5. Each New Lender and each Increasing Lender represents and warrants that
it has received a copy of the Credit Agreement, the most recent financial
statement delivered pursuant to Section 6.2 thereof and such other document and
information as it has determined appropriate to make its own credit analysis and
decision to enter into this Commitment Increase Agreement, and that it has made
such analysis and decision independently and without reliance on Administrative
Agent, LC Issuer or any other Lender.

     6. This Commitment Increase Agreement may not be amended, changed, waived
or modified, except by a writing executed by the parties hereto.

     7. This Commitment Increase Agreement together with the Credit Agreement
embody the entire agreement among New Lenders, Increasing Lenders, Borrower and
Administrative Agent with respect to the subject matter hereof and supersedes
all other prior arrangements and understandings relating to the subject matter
hereof.

     8. This Commitment Increase Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original. Each such
counterpart shall become effective when counterparts have been executed by all
parties hereto. Delivery of an executed counterpart of this Commitment Increase
Agreement by telecopier shall be effective as delivery of a manually executed
counterpart of this Commitment Increase Agreement.

     9. This Commitment Increase Agreement shall be binding upon and inure to
the benefit of each Lender, Administrative Agent, and Borrower and their
respective successors and permitted assigns, except that no party may assign or
transfer any of its rights or obligations hereunder except as contemplated in
the Credit Agreement.

     10. This Commitment Increase Agreement shall be governed by, and construed
in accordance with, the internal laws of the State of New York.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                   EXHIBIT G-2

<PAGE>

     IN WITNESS WHEREOF, Administrative Agent, Borrower, and each New Lender and
each Increasing Lender have executed this Commitment Increase Agreement as of
the date shown above.

                                        AREP OIL & GAS LLC

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

                                        CITICORP USA, INC., as Administrative
                                        Agent

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

                                   EXHIBIT G-3

<PAGE>

                 Signature Page to Commitment Increase Agreement

     IN WITNESS WHEREOF, the undersigned has executed this Commitment Increase
Agreement as of the date shown above.

                                        ----------------------------------------
                                        [Name of Lender]

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

                                   EXHIBIT G-4

<PAGE>

                              CONSENT AND AGREEMENT

     Reference is hereby made to (i) that certain Commitment Increase Agreement
dated as of ________, 20__ (the "COMMITMENT INCREASE AGREEMENT"), by and among
AREP OIL & GAS LLC a Delaware limited liability company (the "BORROWER"),
CITICORP USA, INC., as administrative agent (the "ADMINISTRATIVE AGENT"), and
the Lenders party thereto, (ii) that certain Credit Agreement dated as of
December __, 2005 (as amended, supplemented, modified or restated, the "CREDIT
AGREEMENT") by and among Borrower, Administrative Agent and the Lenders party
thereto, and (iii) the Guaranty to which any of the undersigned is a party.
Terms that are defined in the Credit Agreement and used but not defined herein
have the meanings given to them in the Credit Agreement.

     By its execution below, each of the undersigned hereby (a) consents to the
provisions of the Commitment Increase Agreement and the transactions
contemplated therein, (b) ratifies and confirms the Guaranty and the Security
Documents executed by it pursuant to the Credit Agreement after giving effect to
the Commitment Increase Agreement, (c) agrees that all of its respective
obligations and covenants under such Guaranty and Security Documents shall
remain unimpaired by the execution and delivery of the Commitment Increase
Agreement and the other documents and instruments executed in connection
therewith, and (d) agrees that such Guaranty and Security Documents shall remain
in full force and effect.

            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.]

                                   EXHIBIT G-5

<PAGE>

     IN WITNESS WHEREOF, the undersigned Guarantors have executed this Consent
and Agreement to Commitment Increase Agreement as of the date shown above.

                                        [GUARANTORS]

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

                                   EXHIBIT G-6

<PAGE>

                            SUPPLEMENT TO SCHEDULE I
                                   COMMITMENTS

<TABLE>
<CAPTION>
LENDER   COMMITMENT
------   ----------
<S>      <C>

</TABLE>

                                   EXHIBIT G-7<PAGE>
                                                                    Exhibit 10.2

                               SECURITY AGREEMENT

                          dated as of December 20, 2005

                                      from

                        the Grantors referred to herein,

                                       to

                               CITICORP USA, INC.,
                             as Administrative Agent

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
SECTION                                                                     PAGE
-------                                                                     ----
<S>           <C>                                                           <C>
Section 1.    Grant of Security..........................................     2
Section 2.    Security for Obligations...................................     5
Section 3.    Grantors Remain Liable.....................................     5
Section 4.    Delivery and Control of Security Collateral................     6
Section 5.    Maintaining the Account Collateral.........................     8
Section 6.    Investing of Amounts in the Securities Acccounts...........     9
Section 7.    Maintaining Letter-of-Credit Rights and Giving Notice of
              Commercial Tort Claims.....................................     9
Section 8.    Representations and Warranties.............................    10
Section 9.    Further Assurances.........................................    12
Section 10.   Post-Closing Changes; Bailees; Collections on Receivables
              and Related Contracts......................................    13
Section 11.   As to Intellectual Property Collateral.....................    14
Section 12.   Voting Rights; Dividends; Etc..............................    15
Section 13.   As to Letter-of-Credit Rights..............................    16
Section 14.   Additional Shares..........................................    17
Section 15.   Administrative Agent Appointed Attorney-in-Fact............    17
Section 16.   Administrative Agent May Perform...........................    17
Section 17.   The Administrative Agent's Duties..........................    17
Section 18.   Remedies...................................................    18
Section 19.   Indemnity and Expenses.....................................    22
Section 20.   Subordination of Liens.....................................    23
Section 21.   Amendments; Waivers; Additional Grantors; Etc..............    23
Section 22.   Notices, Etc...............................................    24
Section 23.   Continuing Security Interest; Assignments under the Credit
              Agreement..................................................    24
Section 24.   Release; Termination.......................................    25
</TABLE>

                                        i

<PAGE>

<TABLE>
<S>           <C>                                                           <C>
Section 25.   Terms Generally; References and Titles.....................    25
Section 26.   Execution in Counterparts..................................    26
Section 27.   Governing Law..............................................    26
</TABLE>

Schedules

<TABLE>
<S>                <C>
Schedule I     -   Location, Type of Organization, Jurisdiction of Organization
                   and Organizational Identification Number
Schedule II    -   Pledged Equity and Pledged Debt
Schedule III   -   Changes in Name, Location, Etc.
Schedule IV    -   Intellectual Property
Schedule V     -   Securities Accounts and Deposit Accounts
Schedule VI    -   Letters of Credit
</TABLE>

Exhibits

<TABLE>
<S>                <C>
Exhibit A      -   Form of Security Agreement Supplement
Exhibit B      -   Form of Deposit Account Control Agreement
Exhibit C      -   Form of Account Control Agreement (Deposit Account/Securities
                   Account)
Exhibit D      -   Form of Securities Account Control Agreement
Exhibit E      -   Form of Intellectual Property Security Agreement
Exhibit F      -   Form of Intellectual Property Security Agreement Supplement
Exhibit G      -   Form of Consent to Assignment of Letter of Credit Rights
</TABLE>

                                       ii

<PAGE>

                               SECURITY AGREEMENT

          SECURITY AGREEMENT dated as of December 20, 2005 made by AREP OIL &
GAS LLC, a Delaware limited liability company (the "BORROWER"), the other
Persons listed on the signature pages hereof and the Additional Grantors (as
defined in Section 21) (the Borrower, the Persons so listed and the Additional
Grantors being collectively the "GRANTORS"), to CITIBANK USA, INC., as
administrative agent (the "ADMINISTRATIVE AGENT") for the Secured Parties (as
hereinafter defined)).

                             PRELIMINARY STATEMENTS.

          (1) The Borrower has entered into the Credit Agreement dated as of
December 20, 2005 (as amended, restated, supplemented, or otherwise modified
from time to time, the "CREDIT AGREEMENT"; capitalized terms defined therein and
not otherwise defined herein being used herein as therein defined) with certain
Lenders party thereto, Citicorp USA, Inc., as administrative agent (the
"ADMINISTRATIVE AGENT"), and Bear, Stearns & Co., Inc., as syndication agent.

          (2) As contemplated in the Credit Agreement, the Grantors owe, and may
hereafter owe, Lender Hedging Obligations to some or all of the Lender Parties
and their Affiliates. The Lender Hedging Contracts under which such Lender
Hedging Obligations are owed are herein called the "LENDER HEDGING CONTRACTS".
The Lender Parties, together with all such Affiliates to which Lender Hedging
Obligations are at any time owing, are herein called the "SECURED PARTIES".

          (3) The Grantors are entering into this Agreement in order to grant to
the Administrative Agent for the ratable benefit of the Secured Parties a
security interest in the Collateral (as hereinafter defined).

          (4) Each Grantor is the owner of the shares of stock or other Equity
(the "INITIAL PLEDGED EQUITY") set forth opposite such Grantor's name on and as
otherwise described in Part I of Schedule II hereto and issued by the Persons
named therein and of the indebtedness (the "INITIAL PLEDGED DEBT") set forth
opposite such Grantor's name on and as otherwise described in Part II of
Schedule II hereto and issued by the obligors named therein.

          (5) The Grantors have security entitlements (the "PLEDGED SECURITY
ENTITLEMENTS") with respect to all the financial assets (the "PLEDGED FINANCIAL
ASSETS") credited from time to time to the Grantors' securities accounts (the
"SECURITIES ACCOUNTS"), in their respective names and subject to this Agreement,
described in Schedule V hereto.

          (6) The Grantors have opened deposit accounts (the "DEPOSIT ACCOUNTS")
with banks, in their respective names and subject to this Agreement, as
described in Schedule V hereto.

          (7) It is a condition precedent to the making of Loans and the
issuance of Letters of Credit by the Secured Parties under the Credit Agreement
and the entry into Lender Hedging Contracts by the Lenders from time to time
that the Grantors shall have granted the

<PAGE>

assignment and security interest and made the pledge and assignment contemplated
by this Agreement.

          (8) Each Grantor will derive substantial direct and indirect benefit
from the transactions contemplated by the Loan Documents and the Lender Hedging
Contracts.

          (9) Unless otherwise defined in this Agreement or in the Credit
Agreement, terms defined in Article 8 or 9 of the UCC (as defined below) and/or
in the Federal Book Entry Regulations (as defined below) are used in this
Agreement as such terms are defined in such Article 8 or 9 and/or the Federal
Book Entry Regulations. "UCC" means the Uniform Commercial Code as in effect,
from time to time, in the State of New York; provided that, if perfection or the
effect of perfection or non-perfection or the priority of any security interest
in any Collateral is governed by the Uniform Commercial Code as in effect in a
jurisdiction other than the State of New York, "UCC" means the Uniform
Commercial Code as in effect from time to time in such other jurisdiction for
purposes of the provisions hereof relating to such perfection, effect of
perfection or non-perfection or priority. "FEDERAL BOOK ENTRY REGULATIONS" means
(a) the federal regulations contained in Subpart B ("Treasury/Reserve Automated
Debt Entry System (TRADES)") governing book-entry securities consisting of U.S.
Treasury bonds, notes and bills and Subpart D ("ADDITIONAL PROVISIONS") of 31
C.F.R. Part 357, 31 C.F.R. Section 357.2, Section 357.10 through Section 357.14
and Section 357.41 through Section 357.44 and (b) to the extent substantially
identical to the federal regulations referred to in clause (a) above (as in
effect from time to time), the federal regulations governing other book-entry
securities.

          NOW, THEREFORE, in consideration of the premises and in order to
induce the Secured Parties to make Loans and issue Letters of Credit under the
Credit Agreement and to induce the Secured Parties to enter into Lender Hedging
Contracts from time to time, each Grantor agrees with the Administrative Agent
for the ratable benefit of the Secured Parties as follows:

          Section 1. Grant of Security. Each Grantor grants to the
Administrative Agent, for the ratable benefit of the Secured Parties, a security
interest in such Grantor's right, title and interest in and to the following, in
each case, as to each type of property described below, whether now owned or
hereafter acquired by such Grantor, wherever located, and whether now or
hereafter existing or arising (collectively, the "COLLATERAL"):

          (a) all equipment in all of its forms, including all machinery, tools,
     motor vehicles, furniture and fixtures, and all parts thereof and all
     accessions thereto and all software related thereto, including software
     that is embedded in and is part of the equipment (any and all such property
     being the "Equipment");

          (b) all inventory in all of its forms, including:

               (i) all raw materials, work in process, finished goods and
          materials used or consumed in the manufacture, production, preparation
          or shipping thereof,

               (ii) goods in which such Grantor has an interest in mass or a
          joint or other interest or right of any kind (including goods in which
          such Grantor has an interest or right as consignee) and

                                       2

<PAGE>

               (iii) goods that are returned to or repossessed or stopped in
          transit by such Grantor),

     and all accessions thereto and products thereof and documents therefor, and
     all software related thereto, including software that is embedded in and is
     part of the inventory (any and all such property being the "INVENTORY");

          (c) all chattel paper (including tangible chattel paper and electronic
     chattel paper), instruments (including promissory notes), deposit accounts,
     letter-of-credit rights, general intangibles (including payment intangibles
     and rights as administrative agent or other agent under any loan agreements
     relating to Pledged Debt (as defined below)) and other obligations of any
     kind, whether or not arising out of or in connection with the sale or lease
     of goods or the rendering of services and whether or not earned by
     performance, and all rights now or hereafter existing in and to all
     supporting obligations and in and to all security agreements, mortgages,
     Liens, leases, letters of credit and other contracts securing or otherwise
     relating to the foregoing property (any and all of such accounts, chattel
     paper, instruments, deposit accounts, letter-of-credit rights, general
     intangibles and other obligations, to the extent not referred to in clause
     (d), (e) or (f) below, being the "RECEIVABLES", and any and all such
     supporting obligations, security agreements, mortgages, Liens, leases,
     letters of credit and other contracts being the "RELATED CONTRACTS");

          (d) the following (the "SECURITY COLLATERAL"):

               (i) the Initial Pledged Equity and the certificates, if any,
          representing the Initial Pledged Equity, and all dividends,
          distributions, return of capital, cash, instruments and other property
          from time to time received, receivable or otherwise distributed in
          respect of or in exchange for any or all of the Initial Pledged Equity
          and all subscription warrants, rights or options issued thereon or
          with respect thereto;

               (ii) the Initial Pledged Debt and the instruments, if any,
          evidencing the Initial Pledged Debt, and all interest, cash,
          instruments and other property from time to time received, receivable
          or otherwise distributed in respect of or in exchange for any or all
          of the Initial Pledged Debt;

               (iii) all additional shares of stock and other Equity from time
          to time acquired by such Grantor in any manner (such shares and other
          Equity, together with the Initial Pledged Equity, being the "PLEDGED
          EQUITY"), and the certificates, if any, representing such additional
          shares or other Equity, and all dividends, distributions, return of
          capital, cash, instruments and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of such shares or other Equity and all
          subscription warrants, rights or options issued thereon or with
          respect thereto;

               (iv) all additional Indebtedness from time to time owed to such
          Grantor (such Indebtedness, together with the Initial Pledged Debt,
          being the "PLEDGED

                                       3

<PAGE>

          DEBT") and the instruments, if any, evidencing such indebtedness, and
          all interest, cash, instruments and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of such indebtedness;

               (v) the Securities Accounts, all Pledged Security Entitlements
          with respect to all Pledged Financial Assets from time to time
          credited to the Securities Accounts, all Pledged Financial Assets, and
          all dividends, distributions, return of capital, interest, cash,
          instruments and other property from time to time received, receivable
          or otherwise distributed in respect of or in exchange for any or all
          of the Pledged Security Entitlements or the Pledged Financial Assets
          and all subscription warrants, rights or options issued thereon or
          with respect thereto; and

     all other investment property (including all (A) securities, whether
     certificated or uncertificated, (B) security entitlements, (C) securities
     accounts, (D) commodity contracts and (E) commodity accounts) in which such
     Grantor has now, or acquires from time to time hereafter, any right, title
     or interest in any manner, and the certificates or instruments, if any,
     representing or evidencing such investment property, and all dividends,
     distributions, return of capital, interest, distributions, value, cash,
     instruments and other property from time to time received, receivable or
     otherwise distributed in respect of or in exchange for any or all of such
     investment property and all subscription warrants, rights or options issued
     thereon or with respect thereto;

          (e) the following (collectively, the "ACCOUNT COLLATERAL"):

               (i) the Deposit Accounts and all funds from time to time credited
          thereto, all interest, cash and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of such funds, and all certificates and
          instruments, if any, from time to time representing or evidencing the
          Deposit Accounts;

               (ii) all promissory notes, certificates of deposit, checks and
          other instruments from time to time delivered to or otherwise
          possessed by the Administrative Agent for or on behalf of such
          Grantor, including those delivered or possessed in substitution for or
          in addition to any or all of the then existing Account Collateral; and

               (iii) all interest, cash and other property from time to time
          received, receivable or otherwise distributed in respect of or in
          exchange for any or all of the then-existing Account Collateral;

          (f) the following (collectively, the "INTELLECTUAL PROPERTY
     COLLATERAL"):

               (i) all patents, patent applications, utility models and
          statutory invention registrations, all inventions claimed or disclosed
          therein and all improvements thereto;

                                       4

<PAGE>

               (ii) all trademarks and service marks, together, in each case,
          with the goodwill symbolized thereby;

               (iii) all copyrights, whether registered or unregistered;

               (iv) all computer software, programs and databases;

          (g) all books and records (including customer lists, credit files,
     printouts and other computer output materials and records) of such Grantor
     pertaining to any of the Collateral; and

          (h) all proceeds of, collateral for, income, royalties and other
     payments now or hereafter due and payable with respect to, and supporting
     obligations relating to, any and all of the Collateral (including proceeds,
     collateral and supporting obligations that constitute property of the types
     described in clauses (a) through (g) of this Section 1 and this clause (h))
     and, to the extent not otherwise included, all (A) payments under insurance
     (whether or not the Administrative Agent is the loss payee thereof), or any
     indemnity, warranty or guaranty, payable by reason of loss or damage to or
     otherwise with respect to any of the foregoing Collateral, (B) tort claims,
     including all commercial tort claims and (C) cash,

but in each case excluding from the foregoing any property for which the grant
of a security interest pursuant to this Section 1 would violate any Law or
require the consent of a third party.

          Section 2. Security for Obligations. This Agreement secures, in the
case of each Grantor, the payment of all Obligations of any Credit Party that
are now or hereafter existing under the Loan Documents and all Lender Hedging
Obligations of any Credit Party that are now or hereafter existing, in each case
whether direct or indirect, absolute or contingent, and whether for principal,
reimbursement obligations, interest, fees, premiums, penalties,
indemnifications, contract causes of action, costs, expenses or otherwise (all
such Obligations and Lender Hedging Obligations being the "SECURED
OBLIGATIONS").

          Section 3. Grantors Remain Liable. Anything herein to the contrary
notwithstanding:

          (a) each Grantor shall remain liable under the contracts and
     agreements included in such Grantor's Collateral to the extent set forth
     therein to perform all of its duties and obligations thereunder to the same
     extent as if this Agreement had not been executed;

          (b) the exercise by the Administrative Agent of any of the rights
     hereunder shall not release any Grantor from any of its duties or
     obligations under the contracts and agreements included in the Collateral;
     and

          (c) no Secured Party shall have any obligation or liability under the
     contracts and agreements included in the Collateral by reason of this
     Agreement, any other Loan Document or any Lender Hedging Contract, nor
     shall any Secured Party be obligated to

                                       5

<PAGE>

     perform any of the obligations or duties of any Grantor thereunder or to
     take any action to collect or enforce any claim for payment assigned
     hereunder.

          Section 4. Delivery and Control of Security Collateral. (a) All
certificates or instruments representing or evidencing Security Collateral shall
be delivered to and held by or on behalf of the Administrative Agent pursuant
hereto and shall be in suitable form for transfer by delivery, or shall be
accompanied by duly executed instruments of transfer or assignment in blank, all
in form and substance satisfactory to the Administrative Agent. The
Administrative Agent shall have the right, at any time in its discretion and
without notice to any Grantor, to transfer to or to register in the name of the
Administrative Agent or any of its nominees any or all of the Security
Collateral, subject only to the revocable rights specified in Section 12(a). In
addition, the Administrative Agent shall have the right, upon the occurrence and
during the continuance of an Event of Default at any time to exchange
certificates or instruments representing or evidencing Security Collateral for
certificates or instruments of smaller or larger denominations.

          (b) With respect to any Security Collateral in which any Grantor has
any right, title or interest and that constitutes an uncertificated security,
such Grantor will cause the issuer thereof either:

          (i) to register the Administrative Agent as the registered owner of
     such security or

          (ii) to agree in an authenticated record with such Grantor and the
     Administrative Agent that such issuer will comply with instructions with
     respect to such security originated by the Administrative Agent without
     further consent of such Grantor, such authenticated record to be in form
     and substance satisfactory to the Administrative Agent.

With respect to any Security Collateral in which any Grantor has any right,
title or interest and that is not an uncertificated security, upon the request
of the Administrative Agent, such Grantor will notify each such issuer of
Pledged Equity that such Pledged Equity is subject to the security interest
granted hereunder. Each Grantor that is the issuer of any Security Collateral or
Pledged Equity belonging to another Grantor acknowledges the security interest
granted hereunder in such Security Collateral and will take the actions
described above in this subsection (b).

          (c) With respect to any Security Collateral in which any Grantor has
any right, title or interest and that constitutes a security entitlement in
which the Administrative Agent is not the entitlement holder, such Grantor will
cause the securities intermediary with respect to such security entitlement
either:

          (i) to identify in its records the Administrative Agent as the
     entitlement holder of such security entitlement against such securities
     intermediary or

          (ii) to agree in an authenticated record with such Grantor and the
     Administrative Agent that such securities intermediary will comply with
     entitlement orders (that is, notifications communicated to such securities
     intermediary directing

                                       6

<PAGE>

     transfer or redemption of the financial asset to which such Grantor has a
     security entitlement) originated by the Administrative Agent without
     further consent of such Grantor, such authenticated record to be in
     substantially the form of Exhibit C hereto (in the case of a combined
     Deposit Account and Securities Account) or Exhibit D hereto (in any other
     case) or otherwise in form and substance satisfactory to the Administrative
     Agent (such agreements together being the "SECURITIES ACCOUNT CONTROL
     AGREEMENTS").

          (d) No Grantor will add any securities intermediary that maintains a
Securities Account for such Grantor or open any new securities account with any
then-existing securities intermediary unless:

          (i) the Administrative Agent shall have received at least 10 days'
     prior written notice of such securities intermediary or such new securities
     account, and

          (ii) the Administrative Agent shall have received, in the case of a
     securities intermediary that is not the Administrative Agent, a Securities
     Account Control Agreement authenticated by such new securities intermediary
     and such Grantor, or a supplement to an existing Securities Account Control
     Agreement with such then-existing securities intermediary, covering such
     new securities account (and, upon the receipt by the Administrative Agent
     of such Securities Account Control Agreement or supplement, Schedule V
     hereto shall be automatically amended to include such Securities Account).

No Grantor shall terminate any securities intermediary or terminate any
Securities Account, except that a Grantor may terminate a Securities Account,
and terminate a securities intermediary with respect to such Securities Account
if it gives the Administrative Agent at least 10 days' prior written notice of
such termination (and, upon such termination, Schedule V hereto shall be
automatically amended to delete such securities intermediary and Securities
Account).

          (e) Upon any termination by a Grantor of any Securities Account or any
securities intermediary with respect thereto, such Grantor will immediately:

          (i) transfer all property held in such terminated Securities Account
     to another Securities Account, and

          (ii) notify all Obligors that were making payments to such Securities
     Account to make all future payments to another Securities Account, in each
     case so that the Administrative Agent shall have a continuously perfected
     security interest in such Account Collateral, funds and property.

          (f) So long as no Event of Default shall have occurred and be
continuing, each Grantor shall have sole right to direct the disposition of
funds with respect to each of its Securities Accounts.

          (g) The Administrative Agent may transfer, direct the transfer of, or
sell property credited to any Securities Account to satisfy the Grantor's
obligations under the Loan Documents and Lender Hedging Contracts if an Event of
Default shall have occurred and be continuing.

                                       7

<PAGE>

          (h) Upon the request of the Administrative Agent upon the occurrence
and during the continuance of an Event of Default, such Grantor will notify each
such issuer of Pledged Debt that such Pledged Debt is subject to the security
interest granted hereunder.

          Section 5. Maintaining the Account Collateral. So long as any Loan or
any other Obligation of any Loan Party under any Loan Document shall remain
unpaid, any Letter of Credit shall be outstanding, any Lender Hedging Contract
shall be in effect or any Secured Party shall have any Commitment:

          (a) Each Grantor will maintain all Account Collateral only with the
Administrative Agent or with banks (the "PLEDGED ACCOUNT BANKS") that have
agreed, in a record authenticated by the Grantor, the Administrative Agent and
the Pledged Account Banks, to:

          (i) comply with instructions originated by the Administrative Agent
     directing the disposition of funds in the Account Collateral without the
     further consent of the Grantor and

          (ii) waive or subordinate in favor of the Administrative Agent all
     claims of the Pledged Account Banks (including claims by way of a security
     interest, lien or right of setoff or right of recoupment) to the Account
     Collateral, which authenticated record shall be substantially in the form
     of Exhibit C hereto (in the case of a combined Deposit Account and
     Securities Account) or of Exhibit B hereto (in any other case), or shall
     otherwise be in form and substance reasonably satisfactory to, and as
     negotiated in good faith by, the Administrative Agent (such agreements
     together being the "ACCOUNT CONTROL AGREEMENTS"), provided that each
     Grantor shall have up to 30 days following the date hereof to provide any
     such Account Control Agreement.

          (b) Each Grantor will promptly instruct each Person obligated at any
time to make any payment to such Grantor for any reason (an "OBLIGOR") to make
such payment to a Deposit Account.

          (c) Except for any deposit account holding LC Collateral, no Grantor
will add any bank that maintains a deposit account for such Grantor or open any
new deposit account with any then existing Pledged Account Bank unless:

          (i) the Administrative Agent shall have received at least 10 days'
     prior written notice of such additional bank or such new deposit account,
     and

          (ii) the Administrative Agent shall have received, in the case of a
     bank or Pledged Account Bank that is not the Administrative Agent, an
     Account Control Agreement authenticated by such new bank and such Grantor,
     or a supplement to an existing Account Control Agreement with such then
     existing Pledged Account Bank, covering such new deposit account (and, upon
     the receipt by the Administrative Agent of such Account Control Agreement
     or supplement, Schedule V hereto shall be automatically amended to include
     such Deposit Account).

                                       8

<PAGE>

No Grantor shall terminate any bank as a Pledged Account Bank or terminate any
Account Collateral, except that a Grantor may terminate a Deposit Account, and
terminate a bank as a Pledged Account Bank with respect to such Deposit Account
if it gives the Administrative Agent at least 10 days' prior written notice of
such termination (and, upon such termination, Schedule V hereto shall be
automatically amended to delete such Pledged Account Bank and Deposit Account).

          (d) Upon any termination by a Grantor of any Deposit Account or any
Pledged Account Bank with respect thereto, such Grantor will immediately:

          (i) transfer all funds held in such terminated Deposit Account to
     another Deposit Account, and

          (ii) notify all Obligors that were making payments to such Deposit
     Account to make all future payments to another Deposit Account, in each
     case so that the Administrative Agent shall have a continuously perfected
     security interest in such Account Collateral, funds and property.

          (e) So long as no Event of Default shall have occurred and be
continuing, each Grantor shall have sole right to direct the disposition of
funds with respect to each of its Deposit Accounts.

          (f) The Administrative Agent may, at any time and without notice to,
or consent from, a Grantor transfer, or direct the transfer of, funds from the
Account Collateral to satisfy the Grantor's obligations under the Loan Documents
and Lender Hedging Contracts if an Event of Default shall have occurred and be
continuing.

          (g) Upon the occurrence and during the continuance of any Event of
Default, the Administrative Agent shall be authorized to send to each Pledged
Account Bank a Notice of Exclusive Control as defined in and under any Account
Control Agreement.

          Section 6. Investing of Amounts in the Securities Acccounts(a) . So
long as no Event of Default has occurred and is continuing, the Grantors may,
subject to Sections 5, and 18, from time to time, make investments credited to
Securities Accounts to the extent allowed under Section 7.7 of the Credit
Agreement.

          Section 7. Maintaining Letter-of-Credit Rights and Giving Notice of
Commercial Tort Claims. So long as any Obligation of any Loan Party under any
Loan Document shall remain unpaid, any Letter of Credit shall be outstanding,
any Lender Hedging Contract shall be in effect or any Secured Party shall have
any Commitment:

          (a) Each Grantor will maintain all letter-of-credit rights assigned to
     the Administrative Agent, including all letter-of-credit rights associated
     with the letters of credit described in Schedule VI so that the
     Administrative Agent has control of the letter-of-credit rights in the
     manner specified in Section 9-107 of the UCC; and

          (b) Each Grantor will promptly give notice to the Administrative Agent
     of any commercial tort claim that may arise in the future and will
     immediately execute or

                                       9

<PAGE>

     otherwise authenticate a supplement to this Agreement, and otherwise take
     all necessary action, to subject such commercial tort claim to the first
     priority security interest created under this Agreement.

          Section 8. Representations and Warranties. Each Grantor represents and
warrants as follows:

          (a) Such Grantor's exact legal name, as defined in Section 9-503(a) of
     the UCC, is correctly set forth in Schedule I (as amended as provided in
     Section 10(a)). Such Grantor has only the trade names and marks listed on
     Schedule IV. Such Grantor is located (within the meaning of Section 9-307
     of the UCC), is the type of organization and is organized in the state or
     jurisdiction set forth in Schedule I (as amended as provided in Section
     10(a)). The information set forth in Schedule I(as amended as provided in
     Section 10(a)) with respect to such Grantor is true and accurate in all
     respects. Such Grantor has not, within the prior five years, changed its
     name, location, chief executive office, place where it maintains its
     agreements, type of organization, jurisdiction of organization or
     organizational identification number from those set forth in Schedule I (as
     amended as provided in Section 10(a)) except as disclosed in Schedule V.

          (b) All Security Collateral consisting of certificated securities and
     instruments have been delivered to the Administrative Agent. None of the
     Receivables is evidenced by a promissory note or other instrument that has
     not been delivered to the Administrative Agent.

          (c) Such Grantor is the legal and beneficial owner of the Collateral
     of such Grantor free and clear of any Lien, claim, option or right of
     others, except for the security interest created under this Agreement or as
     permitted under the Credit Agreement. No effective financing statement or
     other instrument similar in effect covering all or any part of such
     Collateral or listing such Grantor or any trade name of such Grantor as
     debtor is on file in any recording office, except such as may have been
     filed in favor of the Administrative Agent relating to the Loan Documents
     or as otherwise permitted under the Credit Agreement.

          (d) The Pledged Equity pledged by such Grantor hereunder has been duly
     authorized and validly issued and is fully paid and non-assessable. With
     respect to the Pledged Equity that is an uncertificated security, such
     Grantor has caused the issuer thereof either:

               (i) to register the Administrative Agent as the registered owner
          of such security or

               (ii) to agree in an authenticated record with such Grantor and
          the Administrative Agent that such issuer will comply with
          instructions with respect to such security originated by the
          Administrative Agent without further consent of such Grantor.

     If such Grantor is an issuer of Pledged Equity, such Grantor confirms that
     it has received notice of such security interest. The Pledged Debt pledged
     by such Grantor hereunder

                                       10

<PAGE>

     has been duly authorized, authenticated or issued and delivered, is the
     legal, valid and binding obligation of the issuers thereof, is evidenced by
     one or more promissory notes (which notes have been delivered to the
     Administrative Agent) and is not in default.

          (e) The Initial Pledged Equity pledged by such Grantor constitutes the
     percentage of the issued and outstanding Equity of the issuers thereof
     indicated on Schedule II. The Initial Pledged Debt constitutes all of the
     outstanding indebtedness owed to such Grantor by the issuers thereof and is
     outstanding in the principal amount indicated on Schedule II.

          (f) All of the investment property owned by such Grantor as of the
     date hereof is listed on Schedule II.

          (g) Except for any deposit account in which LC Collateral may be held,
     such Grantor has no deposit account, other than the Account Collateral
     listed on Schedule V, as amended from time to time pursuant to Section
     5(c), and legal, binding and enforceable Account Control Agreements are in
     effect for each deposit account that constitutes Account Collateral (other
     than Account Collateral consisting of deposit accounts maintained with the
     Administrative Agent). Such Grantor has instructed all existing Obligors to
     make all payments to either a Deposit Account.

          (h) Such Grantor is not a beneficiary or assignee under any letter of
     credit, other than any letter of credit described in Schedule VI, as
     amended from time to time, and legal, binding and enforceable Consents to
     Assignment of Letter of Credit Rights, in the form of the Consent to
     Assignment of Letter of Credit Rights attached hereto as Exhibit G, are in
     effect for each letter of credit that constitutes Collateral. Such Grantor
     has instructed all issuers and nominated persons under letters of credit in
     which the Grantor is the beneficiary or assignee to make all payments to
     either a Deposit Account.

          (i) All filings and other actions (including (A) actions necessary to
     obtain control of Collateral as provided in Sections 9-104, 9-105, 9-106
     and 9-107 of the UCC and (B) actions necessary to perfect the
     Administrative Agent's security interest with respect to Collateral
     evidenced by a certificate of ownership) necessary to perfect the security
     interest in the Collateral of such Grantor created under this Agreement
     have been duly made or taken and are in full force and effect, and this
     Agreement creates in favor of the Administrative Agent for the benefit of
     the Secured Parties a valid and, together with such filings and other
     actions, perfected first priority security interest in the Collateral of
     such Grantor (subject to Permitted Liens), securing the payment of the
     Secured Obligations.

          (j) No authorization or approval or other action by, and no notice to
     or filing with, any governmental authority or regulatory body or any other
     third party is required for:

               (i) the grant by such Grantor of the security interest granted
          hereunder or for the execution, delivery or performance of this
          Agreement by such Grantor,

                                       11

<PAGE>

               (ii) the perfection or maintenance of the security interest
          created hereunder (including the first priority nature of such
          security interest), except for the filing of financing and
          continuation statements under the UCC, which financing statements have
          been duly filed and are in full force and effect, the recordation of
          the Intellectual Property Security Agreements referred to in Section
          11 with the U.S. Patent and Trademark Office and the U.S. Copyright
          Office, which Agreements have been duly recorded and are in full force
          and effect, and the actions described in Section 4 with respect to
          Security Collateral, which actions have been taken and are in full
          force and effect, or

               (iii) the exercise by the Administrative Agent of its voting or
          other rights provided for in this Agreement or the remedies in respect
          of the Collateral pursuant to this Agreement, except as may be
          required in connection with the disposition of any portion of the
          Security Collateral by laws affecting the offering and sale of
          securities generally.

          (k) The Grantor has no commercial tort claims (as defined in Section
     9-102(13) of the UCC), except for commercial tort claims with respect to
     which it has taken the actions required by Section 7(b).

          Section 9. Further Assurances. (a) From time to time, at the expense
of such Grantor, each Grantor will promptly execute and deliver, or otherwise
authenticate, all further instruments and documents, and take all further action
that may be necessary or desirable, or that the Administrative Agent may
reasonably request, in order to perfect and protect any pledge or security
interest granted or purported to be granted by such Grantor hereunder or to
enable the Administrative Agent to exercise and enforce its rights and remedies
hereunder with respect to any Collateral of such Grantor. Without limiting the
generality of the foregoing, each Grantor will promptly with respect to
Collateral of such Grantor:

          (i) mark conspicuously each document included in Inventory, each
     chattel paper included in Receivables, each Related Contract, and, at the
     reasonable request of the Administrative Agent, each of its records
     pertaining to such Collateral with a legend, in form and substance
     satisfactory to the Administrative Agent, indicating that such document,
     chattel paper, Related Contract or Collateral is subject to the security
     interest granted hereby;

          (ii) if any such Collateral shall be evidenced by a promissory note or
     other instrument or chattel paper, deliver and pledge to the Administrative
     Agent hereunder such note or instrument or chattel paper duly indorsed and
     accompanied by duly executed instruments of transfer or assignment, all in
     form and substance satisfactory to the Administrative Agent;

          (iii) execute or authenticate and file such financing or continuation
     statements, or amendments thereto, and such other instruments or notices,
     as may be necessary or desirable, or as the Administrative Agent may
     request, in order to perfect and preserve the security interest granted or
     purported to be granted by such Grantor hereunder;

                                       12

<PAGE>

          (iv) deliver and pledge to the Administrative Agent for benefit of the
     Secured Parties certificates representing Security Collateral that
     constitutes certificated securities, accompanied by undated stock or bond
     powers executed in blank;

          (v) take all action necessary to ensure that the Administrative Agent
     has control of Collateral consisting of deposit accounts, electronic
     chattel paper, investment property, letter-of-credit rights and
     transferable records as provided in Sections 9-104, 9-105, 9-106 and 9-107
     of the UCC;

          (vi) at the reasonable request of the Administrative Agent, take all
     action to ensure that the Administrative Agent's security interest is noted
     on any certificate of ownership related to any Collateral evidenced by a
     certificate of ownership;

          (vii) at the reasonable request of the Administrative Agent, cause the
     Administrative Agent to be the beneficiary under all letters of credit that
     constitute Collateral, with the exclusive right to make all draws under
     such letters of credit, and with all rights of a transferee under Section
     5-114(e) of the UCC; and

          (viii) deliver to the Administrative Agent evidence that all other
     action that the Administrative Agent may deem reasonably necessary or
     desirable in order to perfect and protect the security interest created by
     such Grantor under this Agreement has been taken.

          (b) Each Grantor authorizes the Administrative Agent to file one or
more financing or continuation statements, and amendments thereto, including one
or more financing statements indicating that such financing statements cover all
assets or all personal property (or words of similar effect) of such Grantor, in
each case without the signature of such Grantor, and regardless of whether any
particular asset described in such financing statements falls within the scope
of the UCC or the granting clause of this Agreement. A photocopy or other
reproduction of this Agreement or any financing statement covering the
Collateral or any part thereof shall be sufficient as a financing statement
where permitted by law. Each Grantor ratifies its authorization for the
Administrative Agent to have filed such financing statements, continuation
statements or amendments filed prior to the date hereof.

          (c) Each Grantor will furnish to the Administrative Agent from time to
time statements and schedules further identifying and describing the Collateral
of such Grantor and such other reports in connection with such Collateral as the
Administrative Agent may reasonably request, all in reasonable detail.

          Section 10. Post-Closing Changes; Bailees; Collections on Receivables
and Related Contracts. (a) No Grantor will change its name, type of
organization, jurisdiction of organization, organizational identification number
or location from those set forth in Section 8(a) without first giving at least
30 days' prior written notice to the Administrative Agent and taking all action
required by the Administrative Agent for the purpose of perfecting or protecting
the security interest granted by this Agreement. No Grantor will become bound by
a security agreement authenticated by another Person (determined as provided in
Section 9-203(d) of the UCC) without giving the Administrative Agent 30 days'
prior written notice thereof and taking all action required by the
Administrative Agent to ensure that the perfection and first priority

                                       13

<PAGE>

nature of the Administrative Agent's security interest in the Collateral will be
maintained. . Schedule I to this Agreement may be supplemented from time to time
by the Grantors, or by Additional Grantors at the time of the change or addition
of any Additional Grantor, by prior written notice (as provided herein or as
provided in the Credit Agreement) to the Administrative Agent and from the date
of such notice such Schedule shall be deemed automatically amended to reflect
the information set forth in such notice.

          (b) If any Collateral of any Grantor is at any time in the possession
or control of a warehouseman, bailee or agent, or if the Administrative Agent so
requests such Grantor will:

          (i) notify such warehouseman, bailee or agent of the security interest
     created hereunder,

          (ii) instruct such warehouseman, bailee or agent to hold all such
     Collateral solely for the Administrative Agent's account subject only to
     the Administrative Agent's instructions (which shall permit such Collateral
     to be removed by such Grantor in the ordinary course of business until the
     Administrative Agent notifies such warehouseman, bailee or agent that an
     Event of Default has occurred and is continuing),

          (iii) use commercially reasonable efforts, to cause such warehouseman,
     bailee or agent to authenticate a record acknowledging that it holds
     possession of such Collateral for the Administrative Agent's benefit and
     shall act solely on the instructions of the Administrative Agent without
     the further consent of the Grantor or any other Person, and

          (iv) make such authenticated record available to the Administrative
     Agent.

          (c) Except as otherwise provided in this subsection (c), each Grantor
will continue to collect, at its own expense, all amounts due or to become due
such Grantor under Receivables and Related Contracts. In connection with such
collections, such Grantor may take (and, at the Administrative Agent's
direction, will take) such action as such Grantor or the Administrative Agent
may deem necessary or advisable to enforce collection of the Receivables and
Related Contracts; provided that the Administrative Agent shall have the right
at any time, upon the occurrence and during the continuance of an Event of
Default and upon written notice to such Grantor of its intention to do so, to
notify the Obligors under any Receivables and Related Contracts of the
assignment of such Receivables and Related Contracts to the Administrative Agent
and to direct such Obligors to make payment of all amounts due or to become due
to such Grantor thereunder directly to the Administrative Agent and, upon such
notification and at the expense of such Grantor, to enforce collection of any
such Receivables and Related Contracts, to adjust, settle or compromise the
amount or payment thereof, in the same manner and to the same extent as such
Grantor might have done, and to otherwise exercise all rights with respect to
such Receivables and Related Contracts, including those set forth set forth in
Section 9-607 of the UCC.

          Section 11. As to Intellectual Property Collateral(a) . (a) With
respect to its Intellectual Property Collateral, each Grantor will execute or
otherwise authenticate an Intellectual Property Security Agreement, in
substantially the form set forth in Exhibit E hereto

                                       14

<PAGE>

or otherwise in form and substance satisfactory to the Administrative Agent, for
recording the security interest granted hereunder to the Administrative Agent in
such Intellectual Property Collateral with the U.S. Patent and Trademark Office,
the U.S. Copyright Office and any other governmental authorities necessary to
perfect the security interest hereunder in such Intellectual Property
Collateral.

          (b) Should any Grantor obtain an ownership interest in any item of the
type set forth in Section 1(f) that is not on the date hereof a part of the
Intellectual Property Collateral:

          (i) this Agreement shall automatically apply thereto, and

          (ii) any such item and, in the case of trademarks, the goodwill
     symbolized thereby, shall automatically become part of the Intellectual
     Property Collateral subject to this Agreement.

Each Grantor shall give prompt written notice to the Administrative Agent
identifying such items, and such Grantor shall execute and deliver to the
Administrative Agent with such written notice, or otherwise authenticate, an
Intellectual Property Security Agreement Supplement substantially in the form of
Exhibit F hereto or otherwise in form and substance satisfactory to the
Administrative Agent covering such items, which supplement shall be recorded
with the U.S. Patent and Trademark Office, the U.S. Copyright Office and any
other governmental authorities necessary to perfect the security interest
hereunder in such items.

          Section 12. Voting Rights; Dividends; Etc. (a) Except as set forth in
subsection (b):

          (i) Each Grantor shall be entitled to exercise any and all voting and
     other consensual rights pertaining to the Security Collateral of such
     Grantor or any part thereof for any purpose; provided that such Grantor
     will not exercise or refrain from exercising any such right if such action
     would have a material adverse effect on the value of the Security
     Collateral or any part thereof.

     Each Grantor shall be entitled to receive and retain any and all dividends,
     interest and other distributions paid in respect of the Security Collateral
     of such Grantor if and to the extent that the payment thereof is not
     otherwise prohibited by the terms of the Loan Documents.

          (ii) The Administrative Agent will execute and deliver (or cause to be
     executed and delivered) to each Grantor all such proxies and other
     instruments as such Grantor may reasonably request for the purpose of
     enabling such Grantor to exercise the voting and other rights that it is
     entitled to exercise pursuant to paragraph (i) above and to receive the
     dividends or interest payments that it is authorized to receive and retain
     pursuant to paragraph (ii) above.

          (b) Upon the occurrence and during the continuance of an Event of
Default:

          (i) All rights of each Grantor:

                                       15

<PAGE>

               (A) to exercise or refrain from exercising the voting and other
          consensual rights that it would otherwise be entitled to exercise
          pursuant to Section 12(a)(i) shall, upon notice to such Grantor by the
          Administrative Agent, cease and

               (B) to receive the dividends, interest and other distributions
          that it would otherwise be authorized to receive and retain pursuant
          to Section 12(a)(ii) shall automatically cease,

     and all such rights shall thereupon become vested in the Administrative
     Agent, which shall thereupon have the sole right to exercise or refrain
     from exercising such voting and other consensual rights and to receive and
     hold as Security Collateral such dividends, interest and other
     distributions.

          (ii) All dividends, interest and other distributions that are received
     by any Grantor contrary to the provisions of paragraph (i) of this Section
     12(b) shall be received in trust for the benefit of the Administrative
     Agent, shall be segregated from other funds of such Grantor and shall be
     forthwith paid over to the Administrative Agent as Security Collateral in
     the same form as so received (with any necessary indorsement).

          (iii) The Administrative Agent shall be authorized to send to each
     Securities Intermediary as defined in and under any Security Control
     Agreement a Notice of Exclusive Control as defined in and under such
     Security Account Control Agreement.

          Section 13. As to Letter-of-Credit Rights. (a) Each Grantor, by
granting a security interest in its Receivables consisting of letter-of-credit
rights to the Administrative Agent, intends to (and does) assign to the
Administrative Agent its rights (including its contingent rights) to the
proceeds of all Related Contracts consisting of letters of credit of which it is
or hereafter becomes a beneficiary or assignee. Each Grantor will promptly use
its commercially reasonable efforts to cause the issuer of each letter of credit
and each nominated person (if any) with respect thereto to consent to such
assignment of the proceeds thereof in substantially the form of the Consent to
Assignment of Letter of Credit Rights attached hereto as Exhibit G or otherwise
in form and substance satisfactory to the Administrative Agent and deliver
written evidence of such consent to the Administrative Agent.

          (b) Upon the occurrence of an Event of Default, each Grantor will,
promptly upon request by the Administrative Agent:

          (i) notify (and such Grantor hereby authorizes the Administrative
     Agent to notify) the issuer and each nominated person with respect to each
     of the Related Contracts consisting of letters of credit that the proceeds
     thereof have been assigned to the Administrative Agent hereunder and any
     payments due or to become due in respect thereof are to be made directly to
     the Administrative Agent or its designee, and

          (ii) arrange for the Administrative Agent to become the transferee
     beneficiary of letter of credit.

                                       16

<PAGE>

          Section 14. Additional Shares. Each Grantor will pledge hereunder,
immediately upon its acquisition (directly or indirectly) thereof, any
additional Equity or other securities of each issuer of the Pledged Equity.

          Section 15. Administrative Agent Appointed Attorney-in-Fact. Each
Grantor irrevocably appoints the Administrative Agent such Grantor's
attorney-in-fact, with full authority in the place and stead of such Grantor and
in the name of such Grantor or otherwise, from time to time , upon the
occurrence and during the continuance of an Event of Default, in the
Administrative Agent's discretion, to take any action and to execute any
instrument that the Administrative Agent may deem necessary or advisable to
accomplish the purposes of this Agreement, including, without limitation:

          (a) to obtain and adjust insurance required to be paid to the
     Administrative Agent pursuant to Section 6.8(a) of the Credit Agreement

          (b) to ask for, demand, collect, sue for, recover, compromise, receive
     and give acquittance and receipts for moneys due and to become due under or
     in respect of any of the Collateral,

          (c) to receive, indorse and collect any drafts or other instruments,
     documents and chattel paper, in connection with clause (a) or (b) above,
     and

          (d) to file any claims or take any action or institute any proceedings
     that the Administrative Agent may deem necessary or desirable for the
     collection of any of the Collateral or otherwise to enforce the rights of
     the Administrative Agent with respect to any of the Collateral.

          Section 16. Administrative Agent May Perform. If any Grantor fails to
perform any agreement contained herein, the Administrative Agent may, but
without any obligation to do so and without notice, itself perform, or cause
performance of, such agreement, and the expenses of the Administrative Agent
incurred in connection therewith shall be payable by such Grantor under Section
19.

          Section 17. The Administrative Agent's Duties. (a) The powers
conferred on the Administrative Agent hereunder are solely to protect the
Secured Parties' interest in the Collateral and shall not impose any duty upon
it to exercise any such powers. Except for the safe custody of any Collateral in
its possession and the accounting for moneys actually received by it hereunder,
the Administrative Agent shall have no duty as to any Collateral, as to
ascertaining or taking action with respect to calls, conversions, exchanges,
maturities, tenders or other matters relative to any Collateral, whether or not
any Secured Party has or is deemed to have knowledge of such matters, or as to
the taking of any necessary steps to preserve rights against any parties or any
other rights pertaining to any Collateral. The Administrative Agent shall be
deemed to have exercised reasonable care in the custody and preservation of any
Collateral in its possession if such Collateral is accorded treatment
substantially equal to that which it accords its own property.

          (b) Anything contained herein to the contrary notwithstanding, the
Administrative Agent may from time to time, when the Administrative Agent deems
it to be

                                       17

<PAGE>

necessary, appoint one or more subagents for the Administrative Agent hereunder
with respect to all or any part of the Collateral. If the Administrative Agent
so appoints any such subagent with respect to any Collateral:

          (i) the assignment and pledge of such Collateral and the security
     interest granted in such Collateral by each Grantor hereunder shall be
     deemed for purposes of this Security Agreement to have been made to such
     subagent, in addition to the Administrative Agent, for the ratable benefit
     of the Secured Parties, as security for the Secured Obligations of such
     Grantor,

          (ii) such subagent shall automatically be vested, in addition to the
     Administrative Agent, with all rights, powers, privileges, interests and
     remedies of the Administrative Agent hereunder with respect to such
     Collateral, and

          (iii) the term "Administrative Agent," when used herein in relation to
     any rights, powers, privileges, interests and remedies of the
     Administrative Agent with respect to such Collateral, shall include such
     subagent;

provided that no such subagent shall be authorized to take any action with
respect to any such Collateral unless and except to the extent expressly
authorized in writing by the Administrative Agent.

          Section 18. Remedies. If any Event of Default shall have occurred and
be continuing:

          (a) The Administrative Agent may exercise in respect of the
     Collateral, in addition to other rights and remedies provided for herein or
     otherwise available to it, all the rights and remedies of a Secured Party
     upon default under the UCC (whether or not the UCC applies to the affected
     Collateral) and also may:

               (i) require each Grantor to, and each Grantor will at its expense
          and upon request of the Administrative Agent forthwith, assemble all
          or part of the Collateral as directed by the Administrative Agent and
          make it available to the Administrative Agent at a place and time to
          be designated by the Administrative Agent that is reasonably
          convenient to both parties;

               (ii) without notice except as specified below, sell the
          Collateral or any part thereof in one or more parcels at public or
          private sale, at any of the Administrative Agent's offices or
          elsewhere, for cash, on credit or for future delivery, and upon such
          other terms as the Administrative Agent may deem commercially
          reasonable;

               (iii) occupy any premises owned or leased by any of the Grantors
          where the Collateral or any part thereof is assembled or located for a
          reasonable period in order to effectuate its rights and remedies
          hereunder or under law, without obligation to such Grantor in respect
          of such occupation; and

                                       18

<PAGE>

               (iv) exercise any and all rights and remedies of any of the
          Grantors under or in connection with the Collateral, or otherwise in
          respect of the Collateral, including:

                    (A) any and all rights of such Grantor to demand or
               otherwise require payment of any amount under, or performance of
               any provision of, the Receivables, the Related Contracts and the
               other Collateral,

                    (B) withdraw, or cause or direct the withdrawal, of all
               funds with respect to the Account Collateral and

                    (C) exercise all other rights and remedies with respect to
               the Receivables, the Related Contracts and the other Collateral,
               including those set forth in Section 9-607 of the UCC.

     To the extent that notice of sale shall be required by law, at least 10
     days' notice to such Grantor of the time and place of any public sale or
     the time after which any private sale is to be made shall constitute
     reasonable notification. The Administrative Agent shall not be obligated to
     make any sale of Collateral regardless of notice of sale having been given.
     The Administrative Agent may adjourn any public or private sale from time
     to time by announcement at the time and place fixed therefor, and such sale
     may, without further notice, be made at the time and place to which it was
     so adjourned.

          (b) Any cash held by or on behalf of the Administrative Agent and all
     cash proceeds received by or on behalf of the Administrative Agent in
     respect of any sale of, collection from, or other realization upon all or
     any part of the Collateral may, in the discretion of the Administrative
     Agent, be held by the Administrative Agent as collateral for, and/or then
     or at any time thereafter applied (after payment of any amounts payable to
     the Administrative Agent pursuant to Section 19) in whole or in part by the
     Administrative Agent for the ratable benefit of the Secured Parties
     against, all or any part of the Secured Obligations, in the following
     manner:

               (i) first, paid to the Administrative Agent for any amounts then
          owing to the Administrative Agent pursuant to the Credit Agreement or
          otherwise under the Loan Documents; and

               (ii) second, ratably:

                    (A) paid to the Secured Parties for any amounts then owing
               to them, in their capacities as such, under the Loan Documents
               and Lender Hedging Contracts ratably in accordance with such
               respective amounts then owing to such Secured Parties; provided
               that, for purposes of this Section 18, the amount owing to any
               Lender pursuant to any Lender Hedging Contract to which it is a
               party (other than any amount therefore accrued and unpaid) shall
               be deemed to be equal to the Agreement Value therefor and

                                       19

<PAGE>

                    (B) deposited as LC Collateral as provided in the Credit
               Agreement up to an amount equal to 100% of the aggregate
               Available Amount of all outstanding Letters of Credit; provided
               that:

                         (I) if any such Letter of Credit is drawn, the
                    Administrative Agent shall pay to the Issuing Bank that
                    issued such Letter of Credit the amount held in the L/C
                    Collateral Account in respect of such Letter of Credit, and

                         (II) to the extent that any such Letter of Credit shall
                    expire or terminate undrawn and as a result thereof the
                    amount of the Collateral in the L/C Collateral Account shall
                    exceed 100% of the aggregate Available Amount of all then
                    outstanding Letters of Credit, such excess amount of such
                    Collateral shall be applied in accordance with the remaining
                    order of priority set out in this Section 18(b).

     Any surplus of such cash or cash proceeds held by or on the behalf of the
     Administrative Agent and remaining after payment in full of all the Secured
     Obligations shall be paid over to the applicable Grantor or to whomsoever
     may be lawfully entitled to receive such surplus.

     "AGREEMENT VALUE" means, for each Lender Hedging Contract with any Grantor,
     on any date of determination, an amount determined by the Secured Party
     party thereto equal to:

               (1) if such Lender Hedging Contract is documented pursuant to the
          Master Agreement (Multicurrency-Cross Border) published by the
          International Swap and Derivatives Association, Inc., the amount, if
          any, that would be payable by such Grantor to such Secured Party
          pursuant to such Lender Hedging Contract, as if (x) such Lender
          Hedging Contract was being terminated early on such date of
          determination, (y) such Grantor was the sole "affected party", and (z)
          the Secured Party was the sole party determining such payment (as
          provided in such Master Agreement);

               (2) in the case of any Lender Hedging Contract traded on an
          exchange, the mark-to-market value of such Lender Hedging Contract,
          which will be the unrealized loss thereon to such Grantor, determined
          by such Secured Party based on the settlement price of such Lender
          Hedging Contract on such date of determination; and

               (3) in all other cases, the mark-to-market value of such Lender
          Hedging Contract, which will be the unrealized loss thereon to such
          Grantor, determined by such Secured Party as the amount, if any, by
          which (x) the present value of the future cash flows to be paid by
          such Grantor thereunder exceeds (y) the present value of the future
          cash flows to be paid by such Grantor thereunder.

          (c) All payments received by any Grantor under or in connection with
     in respect of the Collateral shall be received in trust for the benefit of
     the Administrative

                                       20

<PAGE>

     Agent, shall be segregated from other funds of such Grantor and shall be
     forthwith paid over to the Administrative Agent in the same form as so
     received (with any necessary indorsement).

          (d) the Administrative Agent may, without notice to any Grantor,
     except as required by law and at any time or from time to time, charge,
     set-off and otherwise apply all or any part of the Secured Obligations
     against any funds held with respect to the Account Collateral or in any
     other deposit account.

          (e) In the event of any sale or other disposition of any of the
     Intellectual Property Collateral of any Grantor, the goodwill symbolized by
     any trademarks subject to such sale or other disposition shall be included
     therein, and such Grantor shall supply to the Administrative Agent or its
     designee such Grantor's know-how and expertise, and documents and things
     relating to any Intellectual Property Collateral subject to such sale or
     other disposition, and such Grantor's customer lists and other records and
     documents relating to such Intellectual Property Collateral and to the
     manufacture, distribution, advertising and sale of products and services of
     such Grantor.

          (f) The Grantors recognize that the Administrative Agent may deem it
     impracticable to effect a public sale of all or any part of the Security
     Collateral and that the Administrative Agent may, therefore, determine to
     make one or more private sales of any such securities to a restricted group
     of purchasers who will be obligated to agree, among other things, to
     acquire such securities for their own account, for investment and not with
     a view to the distribution or resale thereof. The Grantors acknowledge that
     any such private sale may be at prices and on terms less favorable to the
     seller than the prices and other terms which might have been obtained at a
     public sale and, notwithstanding the foregoing, agree that such private
     sales shall be deemed to have been made in a commercially reasonable manner
     and that the Administrative Agent shall have no obligation to delay sale of
     any such securities for the period of time necessary to permit the Issuer
     of such securities to register such securities for public sale under the
     Securities Act of 1933, as amended. Any offer to sell such securities that
     has been:

               (i) publicly advertised on a bona fide basis in a newspaper or
          other publication of general circulation in the financial community of
          New York, New York (to the extent that such an offer may be so
          advertised without prior registration under such Securities Act), or

               (ii) made privately in the manner described above to not less
          than 15 bona-fide offerees,

     shall be deemed to involve a "public disposition" for the purposes of
     Section 9.610(c) of the UCC (or any successor or similar, applicable
     statutory provision), notwithstanding that such sale may not constitute a
     "public offering" under the Securities Act, and that the Administrative
     Agent or any other Secured Party may, in such event, bid for the purchase
     of such securities.

                                       21

<PAGE>

          Section 19. Indemnity and Expenses. (a) EACH GRANTOR SHALL INDEMNIFY
ADMINISTRATIVE AGENT (AND ANY SUB-AGENT THEREOF), EACH SECURED PARTY 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 FEES,
CHARGES AND DISBURSEMENTS OF ANY COUNSEL FOR ANY INDEMNITEE), AND SHALL
INDEMNIFY AND HOLD HARMLESS EACH INDEMNITEE FROM ALL FEES AND TIME CHARGES AND
DISBURSEMENTS FOR ATTORNEYS WHO MAY BE EMPLOYEES OF ANY INDEMNITEE, INCURRED BY
ANY INDEMNITEE OR ASSERTED AGAINST ANY INDEMNITEE BY ANY THIRD PARTY OR BY ANY
GRANTOR ARISING OUT OF, IN CONNECTION WITH, OR AS A RESULT OF:

          (I) THE EXECUTION OR DELIVERY OF THIS AGREEMENT, ANY OTHER LOAN
     DOCUMENT, ANY LENDER HEDGING CONTRACT OR ANY AGREEMENT OR INSTRUMENT
     CONTEMPLATED HEREBY OR THEREBY, THE PERFORMANCE BY THE PARTIES HERETO OF
     THEIR RESPECTIVE OBLIGATIONS HEREUNDER OR THEREUNDER OR THE CONSUMMATION OF
     THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY,

          (II) ANY LOAN OR LETTER OF CREDIT OR THE USE OR PROPOSED USE OF THE
     PROCEEDS THEREFROM, OR

          (III) ANY ACTUAL OR PROSPECTIVE CLAIM, LITIGATION, INVESTIGATION OR
     PROCEEDING RELATING TO ANY OF THE FOREGOING, WHETHER BASED ON CONTRACT,
     TORT OR ANY OTHER THEORY, WHETHER BROUGHT BY A THIRD PARTY OR BY ANY
     GRANTOR, AND REGARDLESS OF WHETHER ANY INDEMNITEE IS A PARTY THERETO.

THE FOREGOING INDEMNIFICATION WILL APPLY WHETHER OR NOT SUCH LIABILITIES AND
COSTS ARE IN ANY WAY OR TO ANY EXTENT OWED, IN WHOLE OR IN PART, UNDER ANY CLAIM
OR THEORY OF STRICT LIABILITY OR CAUSED, IN WHOLE OR IN PART BY ANY NEGLIGENT
ACT OR OMISSION OF ANY KIND BY ANY INDEMNITEE, 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 NON-APPEALABLE JUDGMENT TO HAVE RESULTED
FROM THE GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF SUCH INDEMNITEE OR IF A
GRANTOR HAS OBTAINED A FINAL AND NON-APPEALABLE JUDGMENT IN ITS FAVOR ON SUCH
CLAIM AS DETERMINED BY A COURT OF COMPETENT JURISDICTION.

          (b) Each Grantor will upon demand pay to the Administrative Agent the
amount of any and all reasonable expenses, including the reasonable fees and
expenses of its counsel and of any experts and agents, that the Administrative
Agent may incur in connection with:

          (i) the administration of this Agreement,

          (ii) the custody, preservation, use or operation of, or the sale of,
     collection from or other realization upon, any of the Collateral of such
     Grantor,

          (iii) the exercise or enforcement of any of the rights of the
     Administrative Agent or the other Secured Parties hereunder or

                                       22

<PAGE>

          (iv) the failure by such Grantor to perform or observe any of the
     provisions hereof.

          (b) To the fullest extent permitted by applicable law, no Grantor
     shall 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, any other Loan
     Document, any Lender Hedging Contract or any agreement or instrument
     contemplated hereby or thereby, the transactions contemplated hereby or
     thereby, any Loan or Letter of Credit or the use of the proceeds thereof.
     No Indemnitee referred to in subsection (a) shall be liable for any damages
     arising from the use by unintended recipients of any information or other
     materials distributed by it through telecommunications, electronic or other
     information transmission systems in connection with this Agreement, the
     other Loan Documents, the Lender Hedging Contracts or the transactions
     contemplated hereby or thereby.

          Section 20. Subordination of Liens. Each Grantor confirms that:

          (a) any and all Liens securing debts, liabilities and other
     Obligations owed to such Grantor by any other Credit Party ("SUBORDINATED
     LIENS") shall be subordinate to any and all Liens under the Security
     Documents securing the Secured Obligations ("SENIOR LIENS") as if the
     Senior Liens were created, filed, recorded and otherwise perfected prior in
     time to the creation, filing, recording and other perfection of the
     Subordinated Liens, and

          (b) by reason of this Agreement, the Administrative Agent, for the
     benefit of the Secured Parties, has a perfected, first-priority Lien on
     each Subordinated Lien and the right, to the exclusion of any Grantor, to
     enforce, exercise remedies, grant waivers, release and take any and all
     other actions with respect to such Subordinated Lien.

          Section 21. Amendments; Waivers; Additional Grantors; Etc. (a) No
amendment or waiver of any provision of this Agreement, and no consent to any
departure by any Grantor herefrom shall in any event be effective unless the
same shall be entered into in accordance with Section 10.1 of the Credit
Agreement. No failure on the part of the Administrative Agent or any other
Secured Party to exercise, and no delay in exercising any right hereunder, shall
operate as a waiver thereof; nor shall any single or partial exercise of any
such right preclude any other or further exercise thereof or the exercise of any
other right.

          (b) Upon the execution and delivery, or authentication, by any Person
of a security agreement supplement in substantially the form of Exhibit A hereto
(each a "SECURITY AGREEMENT SUPPLEMENT"):

          (i) such Person shall be referred to as an "ADDITIONAL GRANTOR" and
     shall be and become a Grantor hereunder, and each reference in this
     Agreement and the other Loan Documents to "Grantor" shall also mean and be
     a reference to such Additional Grantor, and each reference in this
     Agreement, the other Loan Documents and the

                                       23

<PAGE>

     Lender Hedging Contracts to "Collateral" shall also mean and be a reference
     to the Collateral of such Additional Grantor, and

          (ii) the supplemental schedules attached to each Security Agreement
     Supplement shall be incorporated into and become a part of and supplement
     the respective Schedule hereto, and the Administrative Agent may attach
     such supplemental schedules to such Schedules; and each reference to such
     Schedules shall mean and be a reference to such Schedules as supplemented
     pursuant to each Security Agreement Supplement.

          Section 22. Notices, Etc. All notices and other communications
provided for hereunder shall be delivered in the manner provided in the Credit
Agreement, in the case of the Borrower or the Administrative Agent, addressed to
it at its address specified in the Credit Agreement and, in the case of each
Grantor other than the Borrower, addressed to it at its address set forth
opposite such Grantor's name on the signature pages hereto or on the signature
page to the Security Agreement Supplement pursuant to which it became a party
hereto; or, as to any party, at such other address as shall be designated by
such party in a written notice to the other parties. All such notices and other
communications shall be effective when and as provided in the Credit Agreement.
Delivery by telecopier of an executed counterpart of any amendment or waiver of
any provision of this Agreement or of any Security Agreement Supplement or
Schedule hereto shall be effective as delivery of an original executed
counterpart thereof.

          Section 23. Continuing Security Interest; Assignments under the Credit
Agreement. This Agreement shall create a continuing security interest in the
Collateral and shall:

          (a) remain in full force and effect until the latest of:

               (i) the payment in full in cash of the Secured Obligations,

               (ii) the irrevocable termination or expiration of all Commitments
          and

               (iii) the termination or expiration of all Letters of Credit and
          all Lender Hedging Contracts,

          (b) be binding upon each Grantor, its successors and assigns and

          (c) inure, together with the rights and remedies of the Administrative
     Agent hereunder, to the benefit of the Secured Parties and their respective
     successors, transferees and assigns.

Without limiting the generality of the foregoing clause (c), any Secured Party
may assign or otherwise transfer all or any portion of its rights and
obligations under the Credit Agreement (including all or any portion of its
Commitment, the Loans owing to it and the Note or Notes, if any, held by it), to
any other Person, and such other Person shall thereupon become vested with all
the benefits in respect thereof granted to such Secured Party herein or
otherwise, in each case as provided in the Credit Agreement.

                                       24

<PAGE>

          Section 24. Release; Termination. (a) Upon any sale, lease, transfer
or other disposition of any item of Collateral of any Grantor or release of any
Guaranty by a Grantor, in each case in accordance with the terms of the Loan
Documents (other than sales of Inventory in the ordinary course of business),
the Administrative Agent will, at such Grantor's expense, execute and deliver to
such Grantor such documents as such Grantor shall reasonably request to evidence
the release of such item of Collateral from the assignment and security interest
granted hereby; provided that:

          (i) at the time of such request and such release no Event of Default
     shall have occurred and be continuing,

          (ii) such Grantor shall have delivered to the Administrative Agent, at
     least 10 Business Days prior to the date of the proposed release, a written
     request for release describing the item of Collateral and the terms of the
     sale, lease, transfer or other disposition in reasonable detail, including
     the price thereof and any expenses in connection therewith, together with a
     form of release for execution by the Administrative Agent and a certificate
     of such Grantor to the effect that the transaction is in compliance with
     the Loan Documents and as to such other matters as the Administrative Agent
     may request and

          (iii) the proceeds of any such sale, lease, transfer or other
     disposition required to be applied, or any payment to be made in connection
     therewith, in accordance with the Credit Agreement shall, to the extent so
     required, be paid or made to, or in accordance with the instructions of,
     the Administrative Agent when and as required under the Credit Agreement.

          (b) In the circumstances provided in Section 10.9 of the Credit
     Agreement, and subject to the limitations described therein, the
     Administrative Agent will release this Agreement.

          Section 25. Terms Generally; References and Titles. 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." 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;

                                       25

<PAGE>

          (d) all references herein to Articles, Sections and Exhibits shall be
     construed to refer to Articles and Sections of, and Exhibits and Schedules
     to, this Agreement;

          (e) any reference to any law or regulation herein shall, unless
     otherwise specified, refer to such law or regulation as amended, modified
     or supplemented from time to time; and

          (f) 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.

References to any document, instrument, or agreement shall include:

          (i) all exhibits, schedules, and other attachments thereto, and

          (ii) shall include all documents, instruments, or agreements issued or
     executed in replacement thereof.

Titles appearing at the beginning of any subdivision are for convenience only
and do not constitute any part of such subdivision and shall be disregarded in
construing the language contained in such subdivisions. The phrases "this
section" and "this subsection" and similar phrases refer only to the sections or
subsections hereof in which such phrases occur. The word "or" is not exclusive.
Accounting terms have the meanings assigned to them by GAAP, as applied by the
accounting entity to which they refer. References to "days" shall mean calendar
days, unless the term "Business Day" is used. Unless otherwise specified,
references herein to any particular Person also refer to its successors and
permitted assigns.

          Section 26. Execution in Counterparts. This Agreement may be executed
in any number of counterparts, each of which when so executed shall be deemed to
be an original and all of which taken together shall constitute one and the same
agreement. Delivery of an executed counterpart of a signature page to this
Agreement by telecopier shall be effective as delivery of an original executed
counterpart of this Agreement.

          Section 27. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

          Section 28. Subordination of Liens. Each Grantor confirms that:

          (a) any and all Liens securing debts, liabilities and other
     Obligations owed to such Grantor by any other Credit Party ("SUBORDINATED
     LIENS") shall be subordinate to any and all Liens under the Security
     Documents securing the Secured Obligations ("SENIOR LIENS") as if the
     Senior Liens were created, filed, recorded and otherwise perfected prior in
     time to the creation, filing, recording and other perfection of the
     Subordinated Liens, and

                                       26

<PAGE>

          (b) by reason of this Agreement, the Administrative Agent, for the
     benefit of the Secured Parties, has a perfected, first-priority Lien on
     each Subordinated Lien and the right, to the exclusion of any Grantor, to
     enforce, exercise remedies, grant waivers, release and take any and all
     other actions with respect to such Subordinated Lien.

                                       27

<PAGE>

          IN WITNESS WHEREOF, each Grantor has caused this Agreement to be duly
executed and delivered by its officer thereunto duly authorized as of the date
first above written.

                                        AREP OIL & GAS LLC

                                        By: /s/ Philip D. Devlin
                                            ------------------------------------
                                             Name: Philip D. Devlin
                                             Title: Vice President and Secretary

Address for Notices:                    ONSHORE GP LLC
ONSHORE GP, LLC
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    Onshore LP LLC
ONSHORE LP, LLC
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    OFFSHORE GP LLC
OFFSHORE GP, LLC
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    OFFSHORE LP LLC
OFFSHORE LP, LLC
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

                                       28

<PAGE>

Address for Notices:                    NATIONAL ONSHORE LP
NATIONAL ONSHORE LP
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    NATIONAL OFFSHORE LP
NATIONAL OFFSHORE LP
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    MID RIVER LLC
MID RIVER LLC
1400 One Energy Square                  By: AREP Oil & Gas LLC, sole member
4925 Greenville Avenue
Dallas, TX 75206
                                        By: /s/ Philip D. Devlin
                                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    GALVESTON BAY PROCESSING CORPORATION
GALVESTON BAY PROCESSING CORPORATION
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

Address for Notices:                    GALVESTON BAY PIPELINE COMPANY
GALVESTON BAY PIPELINE COMPANY
1400 One Energy Square
4925 Greenville Avenue                  By: /s/ Philip D. Devlin
Dallas, TX 75206                            ------------------------------------
                                        Name: Philip D. Devlin
                                        Title: Vice President and Secretary

                                       29

<PAGE>

                                                                EXHIBIT A TO THE
                                                              SECURITY AGREEMENT

                      FORM OF SECURITY AGREEMENT SUPPLEMENT

                                         [Date of Security Agreement Supplement]

CITICORP USA, INC.,
   as the Administrative Agent for the
   Secured Parties referred to in the
   Credit Agreement referred to below
388 Greenwich Street
New York, NY 10013

                               AREP Oil & Gas LLC

Ladies and Gentlemen:

          Reference is made to (i) the Credit Agreement dated as of December 20,
2005 (as amended, amended and restated, supplemented or otherwise modified from
time to time, the "CREDIT AGREEMENT"), among AREP Oil & Gas LLC, the Lenders
party thereto, Citicorp USA, Inc., as Administrative Agent (together with any
successor Administrative Agent appointed pursuant to the Credit Agreement, the
"ADMINISTRATIVE AGENT"), and Bear, Stearns & Co., Inc., as syndication agent,
and (ii) the Security Agreement dated as of December 20, 2005 (as amended,
amended and restated, supplemented or otherwise modified from time to time, the
"SECURITY AGREEMENT") made by the Grantors from time to time party thereto in
favor of the Administrative Agent for the Secured Parties. Terms defined in the
Credit Agreement or the Security Agreement and not otherwise defined herein are
used herein as defined in the Credit Agreement or the Security Agreement.

          SECTION 1. Grant of Security. The undersigned hereby grants to the
Administrative Agent, for the ratable benefit of the Secured Parties, a security
interest in, all of its right, title and interest in and to all of the
Collateral of the undersigned, whether now owned or hereafter acquired by the
undersigned, wherever located and whether now or hereafter existing or arising,
including the property and assets of the undersigned set forth on the attached
supplemental schedules to the Schedules to the Security Agreement.

          SECTION 2. Security for Obligations. The grant of a security interest
in, the Collateral by the undersigned under this Security Agreement Supplement
and the Security Agreement secures the payment of all Obligations of any Credit
Party that are now or hereafter existing under or in respect of the Loan
Documents and all Lender Hedging Obligations of any Credit Party that are now or
hereafter existing, in each case whether direct or indirect, absolute or
contingent, and whether for principal, reimbursement obligations, interest,
premiums, penalties, fees, indemnifications, contract causes of action, costs,
expenses or otherwise.

<PAGE>

                                        2

          SECTION 3. Supplements to Security Agreement Schedules. The
undersigned has attached hereto supplemental Schedules to the respective
Schedules to the Security Agreement, and the undersigned hereby certifies, as of
the date first above written, that such supplemental schedules have been
prepared by the undersigned in substantially the form of the equivalent
Schedules to the Security Agreement and are complete and correct.

          SECTION 4. Representations and Warranties. The undersigned makes as of
the date hereof each representation and warranty set forth in Section 8 of the
Security Agreement (as supplemented by the attached supplemental schedules) to
the same extent as each other Grantor.

          SECTION 5. Obligations Under the Security Agreement. The undersigned
hereby agrees, as of the date first above written, to be bound as a Grantor by
all of the terms and provisions of the Security Agreement to the same extent as
each of the other Grantors. The undersigned further agrees, as of the date first
above written, that each reference in the Security Agreement to an "Additional
Grantor" or a "Grantor" shall also mean and be a reference to the undersigned.

          SECTION 6. Governing Law. This Security Agreement Supplement shall be
governed by, and construed in accordance with, the laws of the State of New
York.

                                        Very truly yours,

                                        [NAME OF ADDITIONAL GRANTOR]

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

                                        Address for notices:

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

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

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

<PAGE>

                                                                EXHIBIT B TO THE
                                                              SECURITY AGREEMENT

                    FORM OF DEPOSIT ACCOUNT CONTROL AGREEMENT

          ACCOUNT CONTROL AGREEMENT (this "AGREEMENT") dated as of ________,
____, among____________, a ___________ (the "GRANTOR"), Citibank USA, Inc., as
Administrative Agent (the "ADMINISTRATIVE AGENT"), and _________, a _________
("____________"), as securities intermediary and depository bank (the "ACCOUNT
HOLDER").

PRELIMINARY STATEMENTS:

          (1) The Grantor has granted the Secured Party a security interest (the
"SECURITY INTEREST") in the following accounts maintained by the Account Holder
for the Grantor (each, an "ACCOUNT" and collectively, the "ACCOUNTS"):

          [Insert account numbers and other identifying information.]

          (2) Terms defined in Article 9 of the Uniform Commercial Code in
effect in the State of New York ("N.Y. UNIFORM COMMERCIAL CODE") are used in
this Agreement as such terms are defined in such Article 9.

          NOW, THEREFORE, in consideration of the premises and of the mutual
agreements contained herein, the parties hereto hereby agree as follows:

          SECTION 1. The Accounts. The Grantor and Account Holder represent and
warrant to, and agree with, the Administrative Agent that:

          (a) The Account Holder maintains each Account for the Grantor, and
     funds held by the Account Holder for the account of the Grantor are, and
     will continue to be, credited to an Account in accordance with instructions
     given by the Grantor (unless otherwise provided herein).

          (b) To the extent that funds are credited to any Account, such Account
     is a deposit account; and to the extent that financial assets are credited
     to any Account, such Account is a securities account. The Account Holder is
     the bank with which each Account that is a deposit account is maintained.
     The Grantor is the Account Holder's customer with respect to the Accounts.

          (c) Notwithstanding any other agreement to the contrary, the Account
     Holder's jurisdiction with respect to each Account for purposes of the N.Y.
     Uniform Commercial Code is, and will continue to be for so long as the
     Security Interest shall be in effect, the State of New York.

<PAGE>

                                        2

          (d) The Grantor and Account Holder do not know of any claim to or
     interest in any Account or any property (including funds and financial
     assets) credited to any Account, except for claims and interests of the
     parties referred to in this Agreement.

          SECTION 2. Control by Administrative Agent. The Account Holder will
comply with:

          (a) instructions directing disposition of the funds in any and all of
     the Accounts,

          (b) notifications that the Account Holder receives directing it to
     transfer funds in any and all of the Accounts, and

          (c) other directions concerning any and all of the Accounts, including
     directions to distribute to the Administrative Agent proceeds of any such
     transfer or interest or any and all of the Accounts

(any such instruction, notification or direction referred to in clause (a), (b)
or (c) above being an "ACCOUNT DIRECTION"), in each case of clauses (a), (b) and
(c) above originated by the Administrative Agent without further consent by the
Grantor or any other Person.

          SECTION 3. Grantor's Rights in Accounts.

          (a) Except as otherwise provided in this Section 3, the Account Holder
will comply with Account Directions and other directions concerning each Account
originated by the Grantor without further consent by the Administrative Agent.

          (b) Until the Account Holder receives a notice from the Administrative
Agent that the Administrative Agent will exercise exclusive control over any
Account (a "NOTICE OF EXCLUSIVE CONTROL" with respect to such Account), the
Account Holder may distribute to the Grantor all interest and funds in such
Account.

          (c) The Account Holder will not comply with any Account Direction
originated by the Grantor that would require the Account Holder to make a free
delivery of any funds or financial asset to the Grantor or any other Person.

          (d) If the Account Holder receives from the Administrative Agent a
Notice of Exclusive Control with respect to any Account, the Account Holder will
comply only with Account Directions originated by the Administrative Agent and
will cease:

          (i) complying with Account Directions or other directions concerning
     such Account originated by the Grantor, and

          (ii) distributing to the Grantor interest and dividends on property
     (including funds and financial assets) in such Account.

          SECTION 4. Priority of Administrative Agent's Security Interest. (a)
The Account Holder:

<PAGE>

                                        3

          (i) subordinates to the Security Interest and in favor of the
     Administrative Agent any security interest, lien, or right of recoupment or
     setoff that the Account Holder may have, now or in the future, against any
     Account or property (including any funds and financial assets) credited to
     any Account, and

          (ii) agrees that it will not exercise any right in respect of any such
     security interest or lien or any such right of recoupment or setoff until
     the Security Interest is terminated,

except that the Account Holder:

          (A) will retain its prior security interest and lien on property
     credited to any Account,

          (B) may exercise any right in respect of such security interest or
     lien, and

          (C) may exercise any right of recoupment or setoff against any
     Account,

in the case of clauses (A), (B) and (C) above, to secure or to satisfy, and only
to secure or to satisfy, payment:

          (I) for such property,

          (II) for its customary fees and expenses for the routine maintenance
     and operation of such Account, and

          (III) for the face amount of any items that have been credited to such
     Account but are subsequently returned unpaid because of uncollected or
     insufficient funds.

          (b) The Account Holder will not enter into any other agreement with
any Person relating to Account Directions or other directions with respect to
any Account.

          SECTION 5. Statements, Confirmations, and Notices of Adverse Claims.
(a) The Account Holder will send copies of all statements and confirmations for
each Account simultaneously to the Administrative Agent and the Grantor.

          (b) When the Account Holder knows of any claim or interest in any
Account or any property (including funds and financial assets) credited to any
Account other than the claims and interests of the parties referred to in this
Agreement, the Account Holder will promptly notify the Administrative Agent and
the Grantor of such claim or interest.

          SECTION 6. The Account Holder's Responsibility. (a) Except for
permitting a withdrawal, delivery, or payment in violation of Section 3, the
Account Holder will not be liable to the Administrative Agent for complying with
Account Directions or other directions concerning any Account from the Grantor
that are received by the Account Holder before the Account Holder receives and
has a reasonable opportunity to act on a Notice of Exclusive Control.

<PAGE>

                                        4

          (b) The Account Holder will not be liable to the Grantor or the
Administrative Agent for complying with a Notice of Exclusive Control or with an
Account Direction or other direction concerning any Account originated by the
Administrative Agent, even if the Grantor notifies the Account Holder that the
Administrative Agent is not legally entitled to issue the Notice of Exclusive
Control or Account Direction or such other direction unless the Account Holder
takes the action after it is served with an injunction, restraining order, or
other legal process enjoining it from doing so, issued by a court of competent
jurisdiction, and had a reasonable opportunity to act on the injunction,
restraining order or other legal process.

          (c) This Agreement does not create any obligation of the Account
Holder except for those expressly set forth in this Agreement and in Article 4
of the N.Y. Uniform Commercial Code. In particular, the Account Holder need not
investigate whether the Administrative Agent is entitled under the
Administrative Agent's agreements with the Grantor to give an Account Direction
or other direction concerning any Account or a Notice of Exclusive Control. The
Account Holder may rely on notices and communications it believes given by the
appropriate party.

          SECTION 7. Indemnity. The Grantor will indemnify the Account Holder,
its officers, directors, employees and agents against claims, liabilities and
expenses arising out of this Agreement (including reasonable attorney's fees and
disbursements), except to the extent the claims, liabilities or expenses are
caused by the Account Holder's gross negligence or willful misconduct as found
by a court of competent jurisdiction in a final, non-appealable judgment.

          SECTION 8. Termination; Survival. (a) The Administrative Agent may
terminate this Agreement by notice to the Account Holder and the Grantor. If the
Administrative Agent notifies the Account Holder that the Security Interest has
terminated, this Agreement will immediately terminate.

          (b) The Account Holder may terminate this Agreement on 60 days' prior
notice to the Administrative Agent and the Grantor; provided that before such
termination the Account Holder and the Grantor shall make arrangements to
transfer the property (including all funds and financial assets) credited to
each Account to another Account Holder that shall have executed, together with
the Grantor, a control agreement in favor of the Administrative Agent in respect
of such property in substantially the form of this Agreement or otherwise in
form and substance satisfactory to the Administrative Agent.

          (c) Sections 6 and 7 will survive termination of this Agreement.

          SECTION 9. Governing Law. This Agreement and each Account will be
governed by the law of the State of New York. The Account Holder and the Grantor
may not change the law governing any Account without the Administrative Agent's
express prior written agreement.

          SECTION 10. Entire Agreement. This Agreement is the entire agreement,
and supersedes any prior agreements, and contemporaneous oral agreements, of the
parties concerning its subject matter.

<PAGE>

                                        5

          SECTION 11. Amendments. No amendment of, or waiver of a right under,
this Agreement will be binding unless it is in writing and signed by the party
to be charged.

          SECTION 12. Notices. A notice or other communication to a party under
this Agreement will be in writing (except that Account Directions may be given
orally), will be sent to the party's address set forth under its name below or
to such other address as the party may notify the other parties and will be
effective on receipt.

          SECTION 13. Binding Effect. This Agreement shall become effective when
it shall have been executed by the Grantor, the Administrative Agent and the
Account Holder, and thereafter shall be binding upon and inure to the benefit of
the Grantor, the Administrative Agent and the Account Holder and their
respective successors and assigns.

          SECTION 14. Execution in Counterparts. This Agreement may be executed
in any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Delivery of an executed counterpart of a signature page to this Agreement by
telecopier shall be effective as delivery of an original executed counterpart of
this Agreement.

<PAGE>

                                        6

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

                                        [NAME OF GRANTOR]

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

                                        Address:

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

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

                                        CITIBANK USA, INC., as
                                        Administrative Agent

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

                                        Address:

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

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

                                        [NAME OF ACCOUNT HOLDER]

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

Address:

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

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

<PAGE>

                                                                EXHIBIT C TO THE
                                                              SECURITY AGREEMENT

                        FORM OF ACCOUNT CONTROL AGREEMENT

                      (DEPOSIT ACCOUNT/SECURITIES ACCOUNT)

          ACCOUNT CONTROL AGREEMENT (this "AGREEMENT") dated as of ________,
____, among____________, a ___________ (the "GRANTOR"), Citibank USA, Inc., as
Administrative Agent (the "ADMINISTRATIVE AGENT"), and _________, a _________
("____________"), as securities intermediary and depository bank (the "ACCOUNT
HOLDER").

PRELIMINARY STATEMENTS:

          (1) The Grantor has granted the Secured Party a security interest (the
"SECURITY Interest") in the following accounts maintained by the Account Holder
for the Grantor (each, an "ACCOUNT" and collectively, the "ACCOUNTS"):

          [Insert account numbers and other identifying information.]

          (2) Terms defined in Article 8 or 9 of the Uniform Commercial Code in
effect in the State of New York ("N.Y. UNIFORM COMMERCIAL CODE") are used in
this Agreement as such terms are defined in such Article 8 or 9.

          NOW, THEREFORE, in consideration of the premises and of the mutual
agreements contained herein, the parties hereto hereby agree as follows:

          SECTION 1. The Accounts. The Grantor and Account Holder represent and
warrant to, and agree with, the Administrative Agent that:

          (a) The Account Holder maintains each Account for the Grantor, and all
     property (including all funds and financial assets) held by the Account
     Holder for the account of the Grantor are, and will continue to be,
     credited to an Account in accordance with instructions given by the Grantor
     (unless otherwise provided herein).

          (b) To the extent that funds are credited to any Account, such Account
     is a deposit account; and to the extent that financial assets are credited
     to any Account, such Account is a securities account. The Account Holder is
     (i) the bank with which each Account that is a deposit account is
     maintained and (ii) the securities intermediary with respect to financial
     assets held in any Account that is a securities account. The Grantor is (x)
     the Account Holder's customer with respect to the Accounts and (y) the
     entitlement holder with respect to financial assets credited from time to
     time to any Account.

          (c) Notwithstanding any other agreement to the contrary, the Account
     Holder's jurisdiction with respect to each Account for purposes of the N.Y.
     Uniform Commercial Code is, and will continue to be for so long as the
     Security Interest shall be in effect, the State of New York.

<PAGE>

                                        2

          (d) The Grantor and Account Holder do not know of any claim to or
     interest in any Account or any property (including funds and financial
     assets) credited to any Account, except for claims and interests of the
     parties referred to in this Agreement.

          SECTION 2. Control by Administrative Agent. The Account Holder will
comply with:

          (a) all instructions directing disposition of the funds in any and all
     of the Accounts,

          (b) all notifications and entitlement orders that the Account Holder
     receives directing it to transfer or redeem any financial asset in any and
     all of the Accounts, and

          (c) all other directions concerning any and all of the Accounts,
     including directions to distribute to the Administrative Agent proceeds of
     any such transfer or redemption or interest or dividends on property in any
     and all of the Accounts

(any such instruction, notification or direction referred to in clause (a), (b)
or (c) above being an "ACCOUNT DIRECTION"), in each case of clauses (a), (b) and
(c) above originated by the Administrative Agent without further consent by the
Grantor or any other Person.

          SECTION 3. Grantor's Rights in Accounts.

          (a) Except as otherwise provided in this Section 3, the Account Holder
will comply with Account Directions and other directions concerning each Account
originated by the Grantor without further consent by the Administrative Agent.

          (b) Until the Account Holder receives a notice from the Administrative
Agent that the Administrative Agent will exercise exclusive control over any
Account (a "NOTICE OF EXCLUSIVE CONTROL" with respect to such Account), the
Account Holder may distribute to the Grantor all interest and regular cash
dividends on property (including funds and financial assets) in such Account.

          (c) The Account Holder will not comply with any Account Direction
originated by the Grantor that would require the Account Holder to make a free
delivery of any funds or financial asset to the Grantor or any other Person.

          (d) If the Account Holder receives from the Administrative Agent a
Notice of Exclusive Control with respect to any Account, the Account Holder will
comply only with Account Directions originated by the Administrative Agent and
will cease:

          (i) complying with Account Directions or other directions concerning
     such Account originated by the Grantor and

          (ii) distributing to the Grantor interest and dividends on property
     (including funds and financial assets) in such Account.

<PAGE>

                                        3

          SECTION 4. Priority of Administrative Agent's Security Interest. (a)
The Account Holder:

          (i) subordinates to the Security Interest and in favor of the
     Administrative Agent any security interest, lien, or right of recoupment or
     setoff that the Account Holder may have, now or in the future, against any
     Account or property (including any funds and financial assets) credited to
     any Account, and

          (ii) agrees that it will not exercise any right in respect of any such
     security interest or lien or any such right of recoupment or setoff until
     the Security Interest is terminated,

except that the Account Holder:

          (A) will retain its prior security interest and lien on property
     credited to any Account,

          (B) may exercise any right in respect of such security interest or
     lien, and

          (C) may exercise any right of recoupment or setoff against any
     Account,

in the case of clauses (A), (B) and (C) above, to secure or to satisfy, and only
to secure or to satisfy, payment:

          (I) for such property,

          (II) for its customary fees and expenses for the routine maintenance
     and operation of such Account, and

          (III) for the face amount of any items that have been credited to such
     Account but are subsequently returned unpaid because of uncollected or
     insufficient funds.

          (b) The Account Holder will not enter into any other agreement with
any Person relating to Account Directions or other directions with respect to
any Account.

          SECTION 5. Statements, Confirmations, and Notices of Adverse Claims.
(a) The Account Holder will send copies of all statements and confirmations for
each Account simultaneously to the Administrative Agent and the Grantor.

          (b) When the Account Holder knows of any claim or interest in any
Account or any property (including funds and financial assets) credited to any
Account other than the claims and interests of the parties referred to in this
Agreement, the Account Holder will promptly notify the Administrative Agent and
the Grantor of such claim or interest.

          SECTION 6. The Account Holder's Responsibility. (a) Except for
permitting a withdrawal, delivery, or payment in violation of Section 3, the
Account Holder will not be liable to the Administrative Agent for complying with
Account Directions or other directions

<PAGE>

                                        4

concerning any Account from the Grantor that are received by the Account Holder
before the Account Holder receives and has a reasonable opportunity to act on a
Notice of Exclusive Control.

          (b) The Account Holder will not be liable to the Grantor or the
Administrative Agent for complying with a Notice of Exclusive Control or with an
Account Direction or other direction concerning any Account originated by the
Administrative Agent, even if the Grantor notifies the Account Holder that the
Administrative Agent is not legally entitled to issue the Notice of Exclusive
Control or Account Direction or such other direction unless the Account Holder
takes the action after it is served with an injunction, restraining order, or
other legal process enjoining it from doing so, issued by a court of competent
jurisdiction, and had a reasonable opportunity to act on the injunction,
restraining order or other legal process

          (c) This Agreement does not create any obligation of the Account
Holder except for those expressly set forth in this Agreement and, in the case
of any Account that is a securities account, in Part 5 of Article 8 of the N.Y.
Uniform Commercial Code and, in the case of any Account that is a deposit
account, in Article 4 of the N.Y. Uniform Commercial Code. In particular, the
Account Holder need not investigate whether the Administrative Agent is entitled
under the Administrative Agent's agreements with the Grantor to give an Account
Direction or other direction concerning any Account or a Notice of Exclusive
Control. The Account Holder may rely on notices and communications it believes
given by the appropriate party.

          SECTION 7. Indemnity. The Grantor will indemnify the Account Holder,
its officers, directors, employees and agents against claims, liabilities and
expenses arising out of this Agreement (including reasonable attorney's fees and
disbursements), except to the extent the claims, liabilities or expenses are
caused by the Account Holder's gross negligence or willful misconduct as found
by a court of competent jurisdiction in a final, non-appealable judgment.

          SECTION 8. Termination; Survival. (a) The Administrative Agent may
terminate this Agreement by notice to the Account Holder and the Grantor. If the
Administrative Agent notifies the Account Holder that the Security Interest has
terminated, this Agreement will immediately terminate.

          (b) The Account Holder may terminate this Agreement on 60 days' prior
notice to the Administrative Agent and the Grantor; provided that before such
termination the Account Holder and the Grantor shall make arrangements to
transfer the property (including all funds and financial assets) credited to
each Account to another Account Holder that shall have executed, together with
the Grantor, a control agreement in favor of the Administrative Agent in respect
of such property in substantially the form of this Agreement or otherwise in
form and substance satisfactory to the Administrative Agent.

          (c) Sections 6 and 7 will survive termination of this Agreement.

          SECTION 9. Governing Law. This Agreement and each Account will be
governed by the law of the State of New York. The Account Holder and the Grantor
may not change the law governing any Account without the Administrative Agent's
express prior written agreement.

<PAGE>

                                        5

          SECTION 10. Entire Agreement. This Agreement is the entire agreement,
and supersedes any prior agreements, and contemporaneous oral agreements, of the
parties concerning its subject matter.

          SECTION 11. Amendments. No amendment of, or waiver of a right under,
this Agreement will be binding unless it is in writing and signed by the party
to be charged.

          SECTION 12. Financial Assets. To the fullest extent permitted by
applicable law, all property (other than funds) credited from time to time to
any Account will be treated as financial assets under Article 8 of the N.Y.
Uniform Commercial Code.

          SECTION 13. Notices. A notice or other communication to a party under
this Agreement will be in writing (except that Account Directions may be given
orally), will be sent to the party's address set forth under its name below or
to such other address as the party may notify the other parties and will be
effective on receipt.

          SECTION 14. Binding Effect. This Agreement shall become effective when
it shall have been executed by the Grantor, the Administrative Agent and the
Account Holder, and thereafter shall be binding upon and inure to the benefit of
the Grantor, the Administrative Agent and the Account Holder and their
respective successors and assigns.

          SECTION 15. Execution in Counterparts. This Agreement may be executed
in any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Delivery of an executed counterpart of a signature page to this Agreement by
telecopier shall be effective as delivery of an original executed counterpart of
this Agreement.

<PAGE>

                                        6

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

                                        [NAME OF GRANTOR]

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

                                        Address:

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

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

                                        CITIBANK USA, INC., as
                                        Administrative Agent

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

                                        Address:

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

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

                                        [NAME OF ACCOUNT HOLDER]

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

                                        Address:

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

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

<PAGE>

                                                                EXHIBIT D TO THE
                                                              SECURITY AGREEMENT

                  FORM OF SECURITIES ACCOUNT CONTROL AGREEMENT

          CONTROL AGREEMENT dated as of ________, ____, among____________, a
___________ (the "GRANTOR"), CITIBANK USA, INC., as Administrative Agent (the
"ADMINISTRATIVE AGENT"), and _________, a _________ ("____________"), as
securities intermediary (the "SECURITIES INTERMEDIARY").

PRELIMINARY STATEMENTS:

          (1) The Grantor has granted the Administrative Agent a security
interest (the "SECURITY INTEREST") in account no. _______________ maintained by
the Securities Intermediary for the Grantor (the "ACCOUNT").

          (2) Terms defined in Article 8 or 9 of the Uniform Commercial Code in
effect in the State of New York ("N.Y. UNIFORM COMMERCIAL CODE") are used in
this Agreement as such terms are defined in such Article 8 or 9.

          NOW, THEREFORE, in consideration of the premises and of the mutual
agreements contained herein, the parties hereto hereby agree as follows:

          SECTION 1. The Account. The Grantor and Securities Intermediary
represent and warrant to, and agree with, the Grantor and the Administrative
Agent that:

          (a) The Securities Intermediary maintains the Account for the Grantor,
     and all property held by the Securities Intermediary for the account of the
     Grantor is, and will continue to be, credited to the Account.

          (b) The Account is a securities account. The Securities Intermediary
     is the securities intermediary with respect to the property credited from
     time to time to the Account. The Grantor is the entitlement holder with
     respect to the property credited from time to time to the Account.

          (c) The State of New York is, and will continue to be, the Securities
     Intermediary's jurisdiction of organization for purposes of Section
     8-110(e) of the UCC so long as the Security Interest shall remain in
     effect.

          (d) The Grantor and Securities Intermediary do not know of any claim
     to or interest in the Account or any property credited to the Account,
     except for claims and interests of the parties referred to in this
     Agreement.

          SECTION 2. Control by Administrative Agent. The Securities
Intermediary will comply with all notifications it receives directing it to
transfer or redeem any property in the Account (each an "ENTITLEMENT ORDER") or
other directions concerning the Account (including

<PAGE>

                                        2

directions to distribute to the Administrative Agent proceeds of any such
transfer or redemption or interest or dividends on property in the Account)
originated by the Administrative Agent without further consent by the Grantor or
any other person.

          SECTION 3. Grantor's Rights in Account.

          (a) Except as otherwise provided in this Section 3, the Securities
Intermediary will comply with Entitlement Orders originated by the Grantor
without further consent by the Administrative Agent.

          (b) Until the Securities Intermediary receives a notice from the
Administrative Agent that the Administrative Agent will exercise exclusive
control over the Account (a "NOTICE OF EXCLUSIVE CONTROL"), the Securities
Intermediary may distribute to the Grantor all interest and regular cash
dividends on property in the Account.

          (c) The Securities Intermediary will not comply with any Entitlement
Order originated by the Grantor that would require the Securities Intermediary
to make a free delivery to the Grantor or any other person.

          (d) If the Securities Intermediary receives from the Administrative
Agent a Notice of Exclusive Control, the Securities Intermediary will cease:

          (i) complying with Entitlement Orders or other directions concerning
     the Account originated by the Grantor and

          (ii) distributing to the Grantor interest and dividends on property in
     the Account.

          SECTION 4. Priority of Administrative Agent's Security Interest. (a)
The Securities Intermediary subordinates in favor of the Administrative Agent
any security interest, lien, or right of setoff it may have, now or in the
future, against the Account or property in the Account, except that the
Securities Intermediary will retain its prior lien on property in the Account to
secure payment for property purchased for the Account and normal commissions and
fees for the Account.

          (b) The Securities Intermediary will not agree with any Person not
party to this Agreement that the Securities Intermediary will comply with
Entitlement Orders originated by such Person.

          SECTION 5. Statements, Confirmations, and Notices of Adverse Claims.
(a) The Securities Intermediary will send copies of all statements and
confirmations for the Account simultaneously to the Grantor and the
Administrative Agent.

          (b) When the Securities Intermediary knows of any claim or interest in
the Account or any property credited to the Account other than the claims and
interests of the parties referred to in this Agreement, the Securities
Intermediary will promptly the Administrative Agent and the Grantor of such
claim or interest.

<PAGE>

                                        3

          SECTION 6. The Securities Intermediary's Responsibility. (a) Except
for permitting a withdrawal, delivery, or payment in violation of Section 3, the
Securities Intermediary will not be liable to the Administrative Agent for
complying with Entitlement Orders or other directions concerning the Account
from the Grantor that are received by the Securities Intermediary before the
Securities Intermediary receives and has a reasonable opportunity to act on a
Notice of Exclusive Control.

          (b) The Securities Intermediary will not be liable to the Grantor or
the Administrative Agent for complying with a Notice of Exclusive Control or
with an Entitlement Order or other direction concerning the Account originated
by the Administrative Agent , even if the Grantor notifies the Securities
Intermediary that the Administrative Agent is not legally entitled to issue the
Notice of Exclusive Control or Entitlement Order or such other direction unless
the Securities Intermediary takes the action after it is served with an
injunction, restraining order, or other legal process enjoining it from doing
so, issued by a court of competent jurisdiction, and had a reasonable
opportunity to act on the injunction, restraining order or other legal process.

          (c) This Agreement does not create any obligation of the Securities
Intermediary except for those expressly set forth in this Agreement and in Part
5 of Article 8 of the N.Y. Uniform Commercial Code. In particular, the
Securities Intermediary need not investigate whether the Administrative Agent is
entitled under the Administrative Agent's agreements with the Grantor or
Administrative Agent to give an Entitlement Order or other direction concerning
the Account or a Notice of Exclusive Control. The Securities Intermediary may
rely on notices and communications it believes given by the appropriate party.

          SECTION 7. Indemnity. The Grantor will indemnify the Securities
Intermediary, its officers, directors, employees and agents against claims,
liabilities and expenses arising out of this Agreement (including reasonable
attorney's fees and disbursements), except to the extent the claims, liabilities
or expenses are caused by the Securities Intermediary's gross negligence or
willful misconduct as found by a court of competent jurisdiction in a final,
non-appealable judgment.

          SECTION 8. Termination; Survival. (a) The Administrative Agent may
terminate this Agreement by notice to the Securities Intermediary and the
Grantor. If the Administrative Agent notifies the Securities Intermediary that
the Security Interest has terminated, this Agreement will immediately terminate.

          (b) The Securities Intermediary may terminate this Agreement on 60
days' prior notice to the Administrative Agent and the Grantor; provided that
before such termination the Securities Intermediary and the Grantor shall make
arrangements to transfer the property in the Account to another securities
intermediary that shall have executed, together with the Grantor, a control
agreement in favor of the Administrative Agent in respect of such property in
substantially the form of this Agreement or otherwise in form and substance
satisfactory to the Administrative Agent.

          (c) Sections 6 and 7 will survive termination of this Agreement.

<PAGE>

                                        4

          SECTION 9. Governing Law. This Agreement and the Account will be
governed by the law of the State of New York. The Securities Intermediary and
the Grantor may not change the law governing the Account without the
Administrative Agent's express prior written agreement.

          SECTION 10. Entire Agreement. This Agreement is the entire agreement,
and supersedes any prior agreements, and contemporaneous oral agreements, of the
parties concerning its subject matter.

          SECTION 11. Amendments. No amendment of, or waiver of a right under,
this Agreement will be binding unless it is in writing and signed by the party
to be charged.

          SECTION 12. Financial Assets. To the fullest extent permitted by
applicable law, all property credited from time to time to the Account will be
treated as financial assets under Article 8 of the N.Y. Uniform Commercial Code.

          SECTION 13. Notices. A notice or other communication to a party under
this Agreement will be in writing (except that Entitlement Orders may be given
orally), will be sent to the party's address set forth under its name below or
to such other address as the party may notify the other parties and will be
effective on receipt.

          SECTION 14. Binding Effect. This Agreement shall become effective when
it shall have been executed by the Grantor, the Administrative Agent and the
Securities Intermediary, and thereafter shall be binding upon and inure to the
benefit of the Grantor, the Administrative Agent and the Securities Intermediary
and their respective successors and assigns.

          SECTION 15. Execution in Counterparts. This Agreement may be executed
in any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Delivery of an executed counterpart of a signature page to this Agreement by
telecopier shall be effective as delivery of an original executed counterpart of
this Agreement.

<PAGE>

                                        5

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

                                        [NAME OF GRANTOR]

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

                                        Address:

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

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

                                        CITIBANK USA, INC., as
                                        Administrative Agent

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

                                        Address:
                                        388 Greenwich Street
                                        New York, NY 10013

                                        [NAME OF SECURITIES
                                        INTERMEDIARY]

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

                                        Address:

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

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

<PAGE>

                                                                EXHIBIT E TO THE
                                                              SECURITY AGREEMENT

                FORM OF INTELLECTUAL PROPERTY SECURITY AGREEMENT

          This INTELLECTUAL PROPERTY SECURITY AGREEMENT (as amended, amended and
restated, supplemented or otherwise modified from time to time, this
"AGREEMENT") dated ________, ____, is made by the Persons listed on the
signature pages hereof (collectively, the "GRANTORS") in favor of CITIBANK USA,
INC. ("Citibank"), as Administrative Agent (the "ADMINISTRATIVE AGENT") for the
Secured Parties (as defined in the Credit Agreement referred to below).

          WHEREAS, AREP Oil & Gas, LLC, a Delaware limited liability company,
has entered into a Credit Agreement dated as of December 20, 2005 (as amended,
amended and restated, supplemented or otherwise modified from time to time, the
"CREDIT AGREEMENT"), with Citibank, as administrative agent, Bear Stearns & Co.,
Inc., as syndication agent, and the Secured Parties party thereto. Terms defined
in the Credit Agreement and not otherwise defined herein are used herein as
defined in the Credit Agreement.

          WHEREAS, as a condition precedent to the making of Loans and the
issuance of Letters of Credit by the Secured Parties under the Credit Agreement
and the entry into Lender Hedging Contracts by the Lenders from time to time,
each Grantor has executed and delivered that certain Security Agreement dated as
of December 20, 2005 made by the Grantors to the Administrative Agent (as
amended, amended and restated, supplemented or otherwise modified from time to
time, the "SECURITY AGREEMENT").

          WHEREAS, under the terms of the Security Agreement, the Grantors have
granted to the Administrative Agent, for the ratable benefit of the Secured
Parties, a security interest in, among other property, certain intellectual
property of the Grantors, and have agreed as a condition thereof to execute this
Agreement for recording with the U.S. Patent and Trademark Office, the United
States Copyright Office and other governmental authorities.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, each Grantor agrees as follows:

          SECTION 1. Grant of Security. Each Grantor hereby grants to the
Administrative Agent for the ratable benefit of the Secured Parties a security
interest in all of such Grantor's right, title and interest in and to the
following (the "COLLATERAL"):

               (i) the patents and patent applications set forth in Schedule A
          hereto;

               (ii) the trademark and service mark registrations and
          applications set forth in Schedule B hereto (provided that no security
          interest shall be granted in United States intent-to-use trademark
          applications to the extent that, and solely during the period in
          which, the grant of a security interest therein would impair the
          validity or enforceability of such intent-to-use trademark
          applications under applicable federal law), together with the goodwill
          symbolized thereby;

<PAGE>

                                        2

               (iii) all copyrights, whether registered or unregistered, now
          owned or hereafter acquired by such Grantor, including the copyright
          registrations and applications and exclusive copyright licenses set
          forth in Schedule C hereto;

               (iv) all reissues, divisions, continuations,
          continuations-in-part, extensions, renewals and reexaminations of any
          of the foregoing, all rights in the foregoing provided by
          international treaties or conventions, all rights corresponding
          thereto throughout the world and all other rights of any kind
          whatsoever of such Grantor accruing thereunder or pertaining thereto;

               (v) any and all claims for damages and injunctive relief for
          past, present and future infringement, dilution, misappropriation,
          violation, misuse or breach with respect to any of the foregoing, with
          the right, but not the obligation, to sue for and collect, or
          otherwise recover, such damages; and

               (vi) any and all proceeds of, collateral for, income, royalties
          and other payments now or hereafter due and payable with respect to,
          and supporting obligations relating to, any and all of the Collateral
          of or arising from any of the foregoing.

          SECTION 2. Security for Obligations. The grant of a security interest
in, the Collateral by each Grantor under this Agreement secures the payment of
all Obligations of any Credit Party that are now or hereafter existing under or
in respect of the Loan Documents and all Lender Hedging Obligations of any
Credit Party that are now or hereafter existing, in each case whether direct or
indirect, absolute or contingent, and whether for principal, reimbursement
obligations, interest, premiums, penalties, fees, indemnifications, contract
causes of action, costs, expenses or otherwise.

          SECTION 3. Recordation. Each Grantor authorizes and requests that the
Register of Copyrights, the Commissioner for Patents and the Commissioner for
Trademarks and any other applicable government officer record this Agreement.

          SECTION 4. Execution in Counterparts. This Agreement may be executed
in any number of counterparts, each of which when so executed shall be deemed to
be an original and all of which taken together shall constitute one and the same
agreement.

          SECTION 5. Grants, Rights and Remedies. This Agreement has been
entered into in conjunction with the provisions of the Security Agreement. Each
Grantor does hereby acknowledge and confirm that the grant of the security
interest hereunder to, and the rights and remedies of, the Administrative Agent
with respect to the Collateral are more fully set forth in the Security
Agreement, the terms and provisions of which are incorporated herein by
reference as if fully set forth herein.

          SECTION 6. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

<PAGE>

                                        3

          IN WITNESS WHEREOF, each Grantor has caused this Agreement to be duly
executed and delivered by its officer thereunto duly authorized as of the date
first above written.

                                        [NAME OF GRANTOR]

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

                                        Address for Notices:

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

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

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

                                        [NAME OF GRANTOR]

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

                                        Address for Notices:

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

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

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

<PAGE>

                                                                EXHIBIT F TO THE
                                                              SECURITY AGREEMENT

           FORM OF INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT

          This INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT (this
"SUPPLEMENT") dated ________, ____, is made by the Person listed on the
signature page hereof (the "GRANTOR") in favor of CITIBANK USA, INC.
("Citibank"), as Administrative Agent (the "ADMINISTRATIVE AGENT") for the
Lenders (as defined in the Credit Agreement referred to below).

          WHEREAS, AREP Oil & Gas LLC, a Delaware limited liability company, has
entered into the Credit Agreement dated as of December 20, 2005 (as amended,
amended and restated, supplemented or otherwise modified from time to time, the
"CREDIT AGREEMENT"), with Citibank, as administrative agent, Bear Stearns & Co.,
Inc., as syndication agent, and the Lenders party thereto. Terms defined in the
Credit Agreement and not otherwise defined herein are used herein as defined in
the Credit Agreement.

          WHEREAS, pursuant to the Credit Agreement, the Grantor and certain
other Persons have executed and delivered the Security Agreement dated as of
December 20, 2005 made by the Grantor and such other Persons to the
Administrative Agent (as amended, amended and restated, supplemented or
otherwise modified from time to time, the "SECURITY AGREEMENT") and the
Intellectual Property Security Agreement dated ________, ______ (as amended,
amended and restated, supplemented or otherwise modified from time to time, the
"IP SECURITY AGREEMENT").

          WHEREAS, under the Security Agreement, the Grantor has granted to the
Administrative Agent, for the ratable benefit of the Secured Parties, a security
interest in the Additional Collateral (as defined in Section 1 below) of the
Grantor and has agreed as a condition thereof to execute this Supplement for
recording with the U.S. Patent and Trademark Office, the United States Copyright
Office and other governmental authorities.

          NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Grantor agrees as follows:

          SECTION 1. Grant of Security. Each Grantor hereby grants to the
Administrative Agent, for the ratable benefit of the Secured Parties, a security
interest in all of such Grantor's right, title and interest in and to the
following (the "ADDITIONAL COLLATERAL"):

               (i) the patents and patent applications set forth in Schedule A
          hereto;

               (ii) the trademark and service mark registrations and
          applications set forth in Schedule B hereto (provided that no security
          interest shall be granted in United States intent-to-use trademark
          applications to the extent that, and solely during the period in
          which, the grant of a security interest therein would impair the
          validity or enforceability of such intent-to-use trademark
          applications under applicable federal law), together with the goodwill
          symbolized thereby;

<PAGE>

                                        2

               (iii) the copyright registrations and applications and exclusive
          copyright licenses set forth in Schedule C hereto;

               (iv) all reissues, divisions, continuations,
          continuations-in-part, extensions, renewals and reexaminations of any
          of the foregoing, all rights in the foregoing provided by
          international treaties or conventions, all rights corresponding
          thereto throughout the world and all other rights of any kind
          whatsoever of such Grantor accruing thereunder or pertaining thereto;

               (v) all any and all claims for damages and injunctive relief for
          past, present and future infringement, dilution, misappropriation,
          violation, misuse or breach with respect to any of the foregoing, with
          the right, but not the obligation, to sue for and collect, or
          otherwise recover, such damages; and

               (vi) any and all proceeds of, collateral for, income, royalties
          and other payments now or hereafter due and payable with respect to,
          and supporting obligations relating to, any and all of the foregoing
          or arising from any of the foregoing.

          SECTION 2. Supplement to Security Agreement. Schedule VI to the
Security Agreement is, effective as of the date hereof, hereby supplemented to
add to such Schedule the Additional Collateral.

          SECTION 3. Security for Obligations. The grant of a security interest
in the Additional Collateral by the Grantor under this Supplement secures the
payment of all Obligations of any Credit Party that are now or hereafter
existing under or in respect of the Loan Documents and all Lender Hedging
Obligations of any Credit Party that are now or hereafter existing, in each case
whether direct or indirect, absolute or contingent, and whether for principal,
reimbursement obligations, interest, premiums, penalties, fees,
indemnifications, contract causes of action, costs, expenses or otherwise.

          SECTION 4. Recordation. The Grantor authorizes and requests that the
Register of Copyrights, the Commissioner for Patents and the Commissioner for
Trademarks and any other applicable government officer to record this
Supplement.

          SECTION 5. Grants, Rights and Remedies. This Supplement has been
entered into in conjunction with the provisions of the Security Agreement. The
Grantor does hereby acknowledge and confirm that the grant of the security
interest hereunder to, and the rights and remedies of, the Administrative Agent
with respect to the Additional Collateral are more fully set forth in the
Security Agreement, the terms and provisions of which are incorporated herein by
reference as if fully set forth herein.

          SECTION 6. Governing Law. This Supplement shall be governed by, and
construed in accordance with, the laws of the State of New York.

<PAGE>

                                        3

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

                                        [NAME OF GRANTOR]

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

                                        Address for Notices:

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

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

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

<PAGE>

                                                                EXHIBIT G TO THE
                                                              SECURITY AGREEMENT

            FORM OF CONSENT TO ASSIGNMENT OF LETTER OF CREDIT RIGHTS

     To:

     Citicorp USA, Inc., as Administrative Agent
     388 Greenwich Street
     New York, NY 10013

     [INSERT NAME OF BENEFICIARY], as Beneficiary
     [____________________]
     [____________________]
     [____________________]

          We refer to the [INSERT ALL IDENTIFYING INFORMATION WITH RESPECT TO
RELEVANT LETTER OF CREDIT] (as it may be amended, supplemented or otherwise
modified from time to time, the "Letter of Credit. The Letter of Credit has been
established in favor of [INSERT NAME OF BENEFICIARY], as beneficiary (the
"Beneficiary"), and we are the issuing bank (the "ISSUING BANK") required to
give value thereunder pursuant to one [or more] drawing[s] upon the satisfaction
of the conditions stated in the Letter of Credit. The liability of the Issuing
Bank for action or omissions under the Letter of Credit is governed by the laws
of [INSERT RELEVANT JURISDICTION], as chosen by agreement in the Letter of
Credit. The signatories to this consent letter are the only persons obligated to
give value under the Letter of Credit.

          We confirm that there is no term in the Letter of Credit or other
restriction that prohibits, restricts or requires any person's consent to the
Beneficiary's assignment of or creation of a security interest in the rights to
payment or performance under the Letter of Credit. We hereby consent to and
acknowledge the assignment by the Beneficiary of all proceeds of and rights to
payment and performance under the Letter of Credit in favor of Citibank USA,
Inc., as administrative agent (the "ADMINISTRATIVE AGENT") pursuant to the
Security Agreement dated as of December 20, 2005 executed by the Beneficiary and
other parties thereto, as grantors, in favor of the Administrative Agent, as
such agreement may be amended, amended and restated, supplemented or otherwise
modified from time to time (the "SECURITY AGREEMENT").

          We agree to pay, irrespective of, and without deduction for, any
counterclaim, defense, recoupment or set-off, all proceeds of the Letter of
Credit that would otherwise be paid to the Beneficiary directly to the
Administrative Agent to the following account:

                             [____________________]
                             [____________________]
                             [____________________]
                             [____________________]

<PAGE>

                                        2

          We confirm and agree that the Letter of Credit is, and shall continue
to be, in full force and effect and is hereby ratified and confirmed in all
respects and that the Administrative Agent shall have no liability or obligation
under or with respect to the Letter of Credit or any document related thereto as
a result of this consent letter, the Security Agreement or otherwise.

          This consent letter may be executed in any number of counterparts and
by different parties hereto in separate counterparts, each of which when so
executed shall be deemed to be an original and all of which taken together shall
constitute but one and the same consent letter. Delivery of an executed
counterpart of a signature page to this consent letter by telecopier shall be
effective as delivery of an original executed counterpart of this consent
letter.

          This consent letter shall be governed by, and construed in accordance
with, the laws of the State of New York.

                                        [NAME OF ISSUING BANK]

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

                                        [NAME OF NOMINATED PERSON]

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

The above is acknowledged and agreed to:

[NAME OF GRANTOR/BENEFICIARY]

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

Address for Notices:

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

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

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

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