Document:

<PAGE>

                                                                     EXHIBIT 4.4

                  [FORM OF NIELSEN WARRANT EXCHANGE AGREEMENT]
                   ------------------------------------------

                               December ___, 2001

US Unwired Inc.
901 Lakeshore Drive
Lake Charles, Louisiana 70601

IWO Holdings, Inc.
52 Corporate Circle
Albany, New York 12203

Dear Sirs:

     Reference is hereby made to (i) that certain Agreement and Plan of Merger,
dated as of December 19, 2001 (the "Merger Agreement"), by and between US
UNWIRED INC. ("Parent"), a Louisiana corporation, NORTHEAST UNWIRED INC., a
Delaware corporation, and IWO HOLDINGS, INC. (the "Company"), a Delaware
corporation and (ii) the Warrant to Purchase Shares of Class B Common Stock of
IWO Holdings, Inc. dated __________, _____, issued to the undersigned, entitling
the undersigned to purchase up to __________ shares of Class B Common Stock of
the Company at an exercise price of $5.74468 per share (the "Old Warrant").
Capitalized terms used herein and not otherwise defined herein shall have the
respective meanings ascribed thereto in the Merger Agreement.

     The undersigned hereby acknowledges and agrees, without the further
approval or consent of any of the undersigned, the Company or Parent, that,
pursuant and subject to the Merger Agreement, at the Effective Time, the Old
Warrant will be cancelled and cease to represent a right to acquire shares of
Class B Common Stock of the Company and shall automatically be converted into a
warrant (the "New Warrant") to purchase __________ shares of Common Stock of
Parent (which number is derived by multiplying 100% of the underlying number of
shares of Class B Common Stock of the Company subject to the Old Warrant by the
Exchange Ratio) at an exercise price of $5.5392 per share (which exercise price
is derived by dividing $5.74468 by the Exchange Ratio).  The duration and other
terms of the New Warrant shall be the same as the Old Warrant, except that (i)
all references to the Company shall be deemed to be references to Parent and
(ii) the New Warrant shall be exercisable in full, in whole or in part, at any
time on or after December 31, 2003.

     The undersigned hereby waives any notice that may be deemed to be required,
pursuant to Section 2(c) of the Old Warrant or otherwise, to be delivered by the
Company with respect to the transactions contemplated under the Merger
Agreement, and hereby acknowledges and agrees that the Old Warrant shall
terminate at the Effective Time and no longer be of any force or effect.

     The undersigned has had the opportunity to review each of the Parent SEC
Reports (as defined in the Merger Agreement) and is familiar with the business
and financial condition, properties, operations and prospects of Parent.  The
undersigned is familiar with the terms and
<PAGE>

conditions of the Merger and the other transactions contemplated by the Merger
Agreement and has had an opportunity to review the Merger Agreement.

     If the Merger Agreement is terminated for any reason prior to the Effective
Time, this agreement shall terminate and become null and void, and each of the
undersigned, the Company and Parent will be released, without any further
action, from any and all of the obligations arising under this agreement.

                                       2
<PAGE>

     IN WITNESS WHEREOF, the undersigned has executed this Warrant Exchange
Agreement as of the date first written above.

                              _________________________
                              Steven M. Nielsen

Acknowledgment of
Warrant Exchange Agreement:

US UNWIRED INC.

By:  _________________________
     Name:
     Title:

IWO HOLDINGS, INC.

By:  _________________________
     Name:
     Title:<PAGE>

                                                                     EXHIBIT 4.5

                      [FORM OF WARRANT EXCHANGE AGREEMENT]
                       ----------------------------------

                               December ___, 2001

US Unwired Inc.
901 Lakeshore Drive
Lake Charles, Louisiana 70601

IWO Holdings, Inc.
52 Corporate Circle
Albany, New York 12203

Dear Sirs:

     Reference is hereby made to (i) that certain Agreement and Plan of Merger,
dated as of December 19, 2001 (the "Merger Agreement"), by and between US
UNWIRED INC. ("Parent"), a Louisiana corporation, NORTHEAST UNWIRED INC., a
Delaware corporation, and IWO HOLDINGS, INC. (the "Company"), a Delaware
corporation and (ii) the Warrant to Purchase Shares of Class B Common Stock of
IWO Holdings, Inc. dated __________, _____, issued to the undersigned, entitling
the undersigned to purchase up to __________ shares of Class B Common Stock of
the Company at an exercise price of $5.74468 per share (the "Old Warrant").
Capitalized terms used herein and not otherwise defined herein shall have the
respective meanings ascribed thereto in the Merger Agreement.

     The undersigned hereby acknowledges and agrees, without the further
approval or consent of any of the undersigned, the Company or Parent, that,
pursuant and subject to the Merger Agreement, at the Effective Time, the Old
Warrant will be cancelled and cease to represent a right to acquire shares of
Class B Common Stock of the Company and shall automatically be converted into a
warrant (the "New Warrant") to purchase __________ shares of Common Stock of
Parent (which number is derived by multiplying 50% of the underlying number of
shares of Class B Common Stock of the Company subject to the Old Warrant by the
Exchange Ratio) at an exercise price of $5.5392 per share (which exercise price
is derived by dividing $5.74468 by the Exchange Ratio).  The duration and other
terms of the New Warrant shall be the same as the Old Warrant, except that (i)
all references to the Company shall be deemed to be references to Parent and
(ii) the New Warrant shall be exercisable in full, in whole or in part, at any
time on or after the Effective Time.

     The undersigned hereby waives any notice that may be deemed to be required,
pursuant to Section 2(c) of the Old Warrant or otherwise, to be delivered by the
Company with respect to the transactions contemplated under the Merger
Agreement, and hereby acknowledges and agrees that the Old Warrant shall
terminate at the Effective Time and no longer be of any force or effect.

     The undersigned has had the opportunity to review each of the Saints SEC
Reports (as defined in the Merger Agreement) and is familiar with the business
and financial condition, properties, operations and prospects of Parent.  The
undersigned is familiar with the terms and
<PAGE>

conditions of the Merger and the other transactions contemplated by the Merger
Agreement and has had an opportunity to review the Merger Agreement.

     If the Merger Agreement is terminated for any reason prior to the Effective
Time, this agreement shall terminate and become null and void, and each of the
undersigned, the Company and Parent will be released, without any further
action, from any and all of the obligations arising under this agreement.

                            [signature page follows]

                                       2
<PAGE>

     IN WITNESS WHEREOF, the undersigned has executed this Warrant Exchange
Agreement as of the date first written above.

                              [NAME OF ENTITY, IF APPLICABLE]

                              [By:]  _________________________
                                     Name:
                                     [Title:]

Acknowledgment of
Warrant Exchange Agreement:

US UNWIRED INC.

By:  _________________________
     Name:
     Title:

IWO HOLDINGS, INC.

By:  _________________________
     Name:
     Title:<PAGE>

                                                                   Exhibit 10.10

                        SETTLEMENT AND PURCHASE AGREEMENT

     This Settlement and Purchase Agreement ("Agreement"), dated and effective
as of June 14, 2001, is by and between Cheniere Energy, Inc., a Delaware
corporation ("Cheniere"), CXY Corporation, a Texas corporation ("CXY"), Crest
Energy, L.L.C., a Texas limited liability company ("Crest Energy"), Crest
Investment Company, a Texas corporation ("Crest") and Freeport LNG Terminal,
LLC, a Delaware limited liability company ("Freeport"). Jamal Daniel ("Daniel")
is a party hereto solely for purposes of becoming obligated to execute, deliver
and adhere to, and becoming a beneficiary of the other parties' obligations to
execute, deliver and adhere to the Release (as defined hereinafter) and Agreed
Motion and Order (as defined hereinafter). For purposes of this Agreement, CXY
means any and all direct and indirect affiliates, joint ventures, and
subsidiaries of Cheniere and/or CXY that are involved in or became involved in
the LNG business.

                                    RECITALS

     A. Cheniere, Crest and Daniel are parties to a lawsuit pending in the 189th
District Court of Harris County, Texas, under Cause No. 2001-19586, styled
Cheniere Energy Company, Inc. v. Crest Investment Company and Jamal Daniel (the
"Lawsuit") and have agreed to settle the dispute which is the subject of the
Lawsuit.

     B. As part of the settlement, Crest Energy has agreed to transfer to CXY
its membership interests in Freeport and Cheniere has agreed to issue shares of
its common stock to Crest and Cheniere and CXY have agreed to pay a royalty to
Crest.

     NOW, THEREFORE, in consideration of the mutual covenants, agreements,
representations and warranties herein contained, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto agree as follows:

                                    ARTICLE I

     1.01 Purchase and Sale of Interests. Upon the terms, subject to the
          ------------------------------
conditions, and in reliance upon the representations, warranties and covenants
set forth herein, Crest Energy agrees to sell, transfer and assign to CXY at the
Closing (as defined below), and CXY agrees to purchase from Crest Energy at the
Closing, the number of issued and outstanding membership interests in Freeport
that represents all of the issued and outstanding membership interests in
Freeport (such shares collectively referred to herein as the "Interests").

     1.02 Release and Dismissal. Cheniere, Crest and Daniel hereby agree to
          ---------------------
execute on the Closing Date (as defined below) (i) a Mutual Release and
Settlement of All Claims substantially in the form of Exhibit A hereto (the
                                                      ---------
"Release") and (ii) an Agreed Motion for and Order of Dismissal of the Lawsuit
With Prejudice as to its refiling substantially in the form of Exhibit B hereto
                                                               ---------
(the "Agreed Motion and Order").
<PAGE>

     1.03 Consideration. In consideration of the settlement of the Lawsuit and
          -------------
of the sale, transfer and delivery of the Interests by Crest to CXY:

          (a) Following the Closing, Cheniere, CXY and Freeport, jointly and
severally, agree to pay to Crest a royalty (the "Royalty") on the gross
quantities of gas processed through LNG terminals owned by CXY, which Royalty
shall be calculated in accordance with Exhibit C hereto. The Royalty shall be
                                       ---------
payable on the last business day of each calendar month immediately following
the month during which such gas is processed, beginning with the month following
the month during which gas is first processed on a commercial basis (the "First
Production Month") by any LNG facility of CXY. The Royalty obligations of CXY
and Freeport shall be subordinated to, but only to, third party senior project
financing of CXY on the terms set forth on Exhibit D hereto. Cheniere, CXY and
                                           ---------
Freeport agree to refrain from creating or allowing to be created any lien,
security interest or other encumbrance on any asset of CXY or Freeport for
borrowed money that is senior to or pari passu with the Royalty obligation,
exclusive of the senior project financing described in the preceding sentence.
Crest shall have the right to audit Cheniere's and CXY's calculation of the
Royalty and to test the equipment used to measure and record throughput at each
LNG facility and any other equipment used to calculate the Royalty. Cheniere and
CXY shall cooperate with Crest, Crest's independent auditor and their agents in
performing any such audit and testing. The amount of the Royalty and the rate at
which the Royalty is calculated shall be based on gross quantities of gas
processed as described above and in Exhibit C; however, the obligation to pay
                                    ---------
the Royalty shall arise only upon and only to the extent that CXY or its
affiliate receives consideration for such gas processed. Within fifteen days
after the 12 month anniversary of the first day of the First Production Month
(such twelve months collectively, the "First Production Year"), the parties will
calculate the actual Royalty paid with respect to the First Production Year, and
on every 12 month anniversary thereof (each an "Adjustment Date"), the actual
Royalty paid for each subsequent twelve-month period (each a "Production Year"),
the Royalty paid for such Production Year. In the event that the actual Royalty
paid during the First Production Year or any subsequent Production Year is found
to be less than Two Million Dollars ($2,000,000), Cheniere and CXY shall jointly
pay to Crest, on the First Adjustment Date and each subsequent Adjustment Date,
as applicable, in immediately available funds, an amount equal to Two Million
Dollars ($2,000,000) less the actual Royalty paid for such First Production Year
or subsequent Production Year, as applicable. Cheniere and CXY agree to cause
the Royalty obligation created by this Agreement to be binding on any and all
successors or assigns to their equity interests, whether by merger, stock
purchase or otherwise, and on any and all successors, assigns, transferees or
purchasers of assets constituting all or substantially all of the assets of any
LNG facility, unless, at the time of each such transfer of assets, CXY has under
contract at one or more LNG facilities it will retain, the right and obligation
to process and receive tariff for processing at least One Billion Mcf of gas per
day, for a period of at least 5 years following such transfer of assets. In the
event that Cheniere and CXY retain ownership of any LNG facility, but propose to
transfer any other LNG facility to an unrelated party, the parties hereto agree
to negotiate with each other and with the proposed LNG facility transferee to
divide the obligations to make minimum and maximum Royalty payments to Crest (as
set forth on Exhibit C) based on the proposed division of the LNG facilities and
             ---------
the trailing twelve-month production and tariffs of such LNG facilities;
provided, however, that the economic benefit to Crest of the divided Royalty
obligations shall be no less favorable to Crest than those originally provided
for hereunder, provided, further, that in the event that such parties are unable
to agree upon the

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<PAGE>

division of such minimum and maximum Royalty obligations, then Cheniere and CXY
shall cause such transferee to assume the full Royalty obligations as in
existence under this Agreement immediately prior to the closing of such proposed
transfer; and

          (b) At the Closing, Cheniere shall issue in the name of Crest and
deliver to Crest 500,000 shares (the "Closing Shares") of the common stock, par
value $0.003, of Cheniere ("Cheniere Common Stock"); and

          (c) Within five business days after the occurrence, if ever, of an
Issuance Event (as defined below), Cheniere shall deliver to Crest 750,000
shares (as adjusted in accordance with the terms hereof, the "Contingent
Shares") of Cheniere Common Stock.

          The number of Contingent Shares deliverable by Cheniere shall be
subject to adjustment as provided in Article VI hereof. The Closing Shares and
                                     ----------
Contingent Shares are referred to collectively herein as the "Share
Consideration." As used herein, the term "Issuance Event" shall mean the receipt
by CXY or its successor in interest to any LNG facility, its assign or its
affiliate of a permit, in form and substance reasonably satisfactory to
Cheniere, to immediately begin construction in the United States of a receiving
terminal for liquefied natural gas.

1.04 Crest Registration Rights.
     -------------------------

          (a) Cheniere shall, as soon as reasonably practicable following the
Closing, and in any event within 30 days following the date of issuance of each
of the Closing Shares and Contingent Shares, file with the Securities and
Exchange Commission ("Commission") and use its commercially reasonable best
efforts to cause to become effective a registration statement under the
Securities Act of 1933, as amended (the "Securities Act"), covering the resale
of all of such shares and keep such registration statement effective for up to
two years or, if earlier, until all of such shares have been disposed of by
Crest. Cheniere shall (i) prepare and file with the Commission such amendments
and supplements to each such registration statement and the prospectus used in
connection with each such registration statement as may be necessary to comply
with the provisions of the Securities Act with respect to the disposition of all
securities covered by such registration statement for the period set forth in
the immediately preceding sentence; (ii) furnish to Crest such number of copies
of a prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents as Crest may
reasonably request in order to facilitate the disposition of such shares; (iii)
use its reasonable efforts to register and qualify the securities covered by
each such registration statement under such other securities or Blue Sky laws of
such jurisdictions as shall be reasonably requested; provided that Cheniere
shall not be required in connection therewith or as a condition thereto to
qualify to do business or to file a general consent to service of process in any
such states or jurisdictions; (iv) notify Crest at any time when a prospectus
relating thereto is required to be delivered under the Securities Act of the
happening of any event as a result of which the prospectus included in each such
registration statement, as then in effect, includes an untrue statement of a
material fact or omits to state a material fact required to be stated therein or
necessary to make the statements therein not misleading in the light of the
circumstances then existing and use its reasonable efforts to, as promptly as
practicable, amend or supplement such prospectus in order to cause such
prospectus not to include any untrue statement of a material

                                       3
<PAGE>

fact or omit to state a material fact required to be stated therein or necessary
to make the statements therein not misleading in the light of the circumstances
then existing; and (v) use reasonable efforts to cause such shares to be listed
on each securities exchange on which similar securities issued by Cheniere are
then listed and to be qualified for trading on each system on which securities
issued by Cheniere are from time to time qualified.

          (b) In addition to the foregoing, at Closing, Cheniere and Crest shall
enter into a Registration Rights Agreement in substantially the form of Exhibit
                                                                        -------
E hereto, proving for certain demand and piggyback registration rights.
-
     1.05 Right of First Refusal. In the event that on or before December 31,
          ----------------------
2021, CXY or any of its subsidiaries or affiliates conducting LNG business
proposes to (i) obtain any equity financing or (ii) sell, transfer or assign all
or substantially all of the assets constituting any LNG facility developed using
the property that is the subject of the Lease Option, the right to provide such
equity financing, in whole or in part, and the right to purchase such assets, as
applicable, shall first be offered to Crest in accordance with this Section
                                                                    -------
1.05. Cheniere shall cause CXY to deliver a notice to Crest (the "Offer Notice")
----
containing a description of the proposed transaction and the terms thereof,
including a description of the equity securities to be issued or a statement of
the assets to be sold or transferred, as applicable, and a statement of the
amount of consideration to be received by CXY therefor. At the same time as the
delivery of the Offer Notice, Cheniere shall cause CXY to deliver to Crest an
offer to sell the securities that are the subject of such equity financing or
assets that are proposed to be sold to Crest on the same terms and conditions
and for the same consideration as described in the Offer Notice. For a period of
30 business days after such offer is sent to Crest, Crest may, by notice to
Cheniere or CXY accept the offer to acquire such securities, in whole or in
part, or such assets as applicable. Such acceptance shall specify a proposed
date for closing such purchase, which date shall not be later than 90 days from
the date the offer described above is sent to Crest by CXY. In the event that
Crest does not agree to provide any of the proposed equity financing or purchase
such assets, CXY shall have the right to proceed with the equity financing with
respect to the portion not so provided by Crest or asset sale, as applicable, on
the terms specified in the Offer Notice; provided, however, that if CXY fails to
consummate such equity financing or such asset sale within 180 days after the
date of the Offer Notice or proposes to consummate such equity financing or
asset sale on terms that differ in any material respect from the terms set forth
in the Offer Notice, the right of first refusal contemplated by this Section
                                                                     -------
1.05 shall again be applicable.
----

     1.06 Advisory Board Seats. Cheniere shall permit Crest to appoint an
          --------------------
advisory member to its Board of Directors and CXY shall permit Crest to appoint
up to two advisory members to its Board of Directors. Such advisory members
shall receive notice of and be invited to be present at and participate in (i)
all Board meetings and (ii) all meetings of the Executive Committee of the
Board, as applicable, of such companies. Each such advisory member shall serve
in an advisory role only and owe no fiduciary duty to Cheniere, CXY, their
stakeholders, creditors, other stockholders or any of their affiliates.

     1.07 Cheniere and CXY agree to cause any and all of their direct and
indirect, present and future affiliates, joint ventures and subsidiaries that
are involved in the LNG business to assume and adopt the obligations of Cheniere
and CXY under this Agreement.

                                       4
<PAGE>

                                   ARTICLE II

            REPRESENTATIONS AND WARRANTIES OF CREST ENERGY AND CREST

Except as disclosed on the Disclosure Schedule delivered to Cheniere by Crest
Energy and Crest and attached hereto (the "Disclosure Schedule"), Crest Energy
and Crest hereby jointly and severally represent and warrant to Cheniere as
follows:

     2.01 Organization and Qualification, etc. Crest is a corporation duly
          -----------------------------------
organized, validly existing and in good standing under the laws of the State of
Texas and has all requisite power and authority to own, lease and operate its
assets and to carry on its business as it is now being conducted. Each of Crest
Energy and Freeport are limited liability companies duly organized, validly
existing and in good standing under the laws of the States of Texas and
Delaware, respectively, and have all requisite power and authority to own, lease
and operate their assets and to carry on their businesses as now being
conducted. Each of Crest Energy, Crest and Freeport is duly qualified to do
business in each jurisdiction in which qualification is required, except where
its failure to be qualified would not have a material adverse effect on its
operations or financial condition.

     2.02 Interests. The Interests constitute all of the issued and outstanding
          ---------
equity interests in Freeport. The Interests are validly issued and outstanding,
fully paid and nonassessable. There are no options, warrants, calls, commitments
or other rights of any kind obligating Freeport to issue, sell or otherwise
transfer any membership or other equity interests. None of the Interests was
issued in violation of the preemptive rights of any person.

     2.03 Ownership of Interests. Crest Energy owns all of the Interests, free
          ----------------------
and clear of all liens, options, charges, equities, encumbrances or claims of
any kind. There is no restriction on transfer of the Interests from Crest Energy
to CXY. Upon the delivery to CXY of an assignment of the Interests as
contemplated by this Agreement, and without the consent or approval of any other
party, good and valid title to such Interests will be vested in CXY free and
clear of all liens, options, charges, equities, encumbrances and claims of any
kind. Crest has not granted or agreed to grant and is not otherwise bound by any
options, warrants, calls, commitments or other rights to purchase or otherwise
acquire, or other obligations to issue, or other rights to convert any
obligations into, any membership or other equity interests in Freeport,
including the Interests.

     2.04 Investments. Freeport has no subsidiaries and has no advances to, or
          -----------
investments in, any securities of, or other equity interest in, any other
corporation, partnership, business entity, joint venture, enterprise or
organization, public or private.

     2.05 Absence of Undisclosed Liabilities. Except for the Lease Option (as
          ----------------------------------
defined below) and except to the extent expressly permitted by the terms of this
Agreement, Freeport does not have any liabilities or obligations, whether
asserted or unasserted, whether secured or unsecured, whether known or unknown,
whether accrued or unaccrued, whether absolute or contingent, whether liquidated
or unliquidated, whether due or to become due, and whether choate or inchoate or
otherwise.

                                       5
<PAGE>

     2.06 Authority; Validity; Conflicts. This Agreement has been duly
          ------------------------------
authorized, executed and delivered by Crest Energy, Crest and Freeport and
constitutes the valid and legally binding agreement and obligation of Crest
Energy, Crest and Freeport, enforceable against Crest Energy, Crest and Freeport
in accordance with its terms, except insofar as the enforceability thereof may
be limited by applicable bankruptcy, insolvency, reorganization, moratorium or
other similar laws affecting the enforcement of creditors' rights generally and
by general principles of equity. Upon execution and delivery of the agreements,
certificates or other documents contemplated hereby to be executed and delivered
by Crest Energy, Crest and Freeport, such agreements, certificates or documents
will be enforceable against Crest Energy, Crest and Freeport in accordance with
their respective terms, except insofar as the enforceability thereof may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium or
other similar laws affecting the enforcement of creditors' rights generally and
by general principles of equity. The execution and delivery by Crest Energy,
Crest and Freeport of this Agreement do not, and the execution and delivery by
Crest Energy, Crest and Freeport of the agreements, certificates and other
documents contemplated hereby and the consummation by Crest Energy and Crest of
the transactions contemplated hereby will not, violate any provision of, the
organizational documents of Crest Energy, Crest and/or Freeport or violate any
provision of, create any conflict with, result in the acceleration of any
obligation under or constitute a default under, any material loan agreement,
indenture, lease, mortgage, financing statement, contract, instrument or any
other commitment (or written) of any kind to which Crest Energy, Crest or
Freeport is a party or by which any of the Interests or the assets of Crest
Energy, Crest or Freeport is bound. Crest has provided Cheniere with a true and
correct copy of the Certificate of Formation and Regulations of Freeport, which
constitute the only organizational documents of Freeport.

     2.07 Assets. Freeport does not own any material assets other than the
          ------
Agreement for Lease Option dated March 23, 2001, between Freeport (as successor
in interest to Crest) and the Brazos River Harbor Navigation District (the
"Lease Option"). A true and correct copy of the Lease Option, including the
Assignment of Agreement for Lease Option, has been delivered to Cheniere.
Neither Crest nor Freeport has granted any lien, pledge or security interest in
the Lease Option. In addition, neither Crest nor Freeport has assigned any of
its right, title or interest in the Lease Option. Except as otherwise provided
in this Section 2.07, Crest, Crest Energy and Freeport make no representations
        ------------
or warranties as to the Lease Option of any nature, including, without
limitation, as to the validity or enforceability of the Lease Option.

     2.08 Brokers. None of Crest Energy, Crest or Freeport have engaged the
          -------
services of any broker or finder or incurred any liability for brokerage fees,
finders' fees, agents' commissions or other forms of compensation in connection
with the transactions set forth in this Agreement in a manner that will result
in any liability on the part of Cheniere.

     2.09 Securities Law Matters.
          ----------------------

          (i) The issuance to Crest of the Share Consideration (collectively
referred to in this Section as the "Securities") is intended to be exempt from
registration under the Securities Act. Crest represents and warrants that it is
an "accredited investor" as defined in Rule 501(a) promulgated under the
Securities Act.

                                       6
<PAGE>

          (ii) Crest is acquiring the Securities for its own account, for
investment purposes only, and not with a view to the resale or distribution
thereof, except pursuant to effective registrations or qualifications relating
thereto under the Securities Act and applicable state securities or blue sky
laws or pursuant to an exemption therefrom. Notwithstanding the foregoing,
Cheniere acknowledges that the purpose of the registration statements referenced
in Section 1.04 above will be to permit Crest to offer for sale in a public
   ------------
offering the Share Consideration after such registration statements become
effective.

          (iii) Crest acknowledges that (A) the Securities have not been
registered under the Securities Act or the securities laws of any state or other
jurisdiction in reliance upon exemptions from such registration requirements for
non-public offerings and (B) the Securities may not be sold, pledged or
otherwise transferred except pursuant to effective registrations or an exemption
relating thereto under the Securities Act and any applicable state securities
laws.

          (iv) Crest hereby represents and warrants to, and covenants with,
Cheniere, that Crest will not sell, assign or transfer all or any part of the
Securities except (A) pursuant to an effective registration statement under the
Securities Act, or (B) in a transaction that, in the opinion of independent
counsel reasonably satisfactory to the parties, may be made without registration
under Federal and any applicable state securities laws.

          (v) Crest has such knowledge and experience in financial and business
matters so that it is capable of evaluating and has evaluated the relative
merits and risks of investing in the Securities. At closing, Crest will have
adequate means of providing for its current economic needs and contingencies,
will have no need for liquidity in its investment in the Securities and will be
able to bear financially the risks of such investment.

          (vi) Crest acknowledges that all documents, books and records that
pertain to its investments in the Securities and that have been requested by
Crest, if any, have been made available or delivered to Crest, to the extent
Cheniere can provide such information without unreasonable effort or expense.
Crest has had an opportunity to discuss Cheniere's business, management and
financial affairs with Cheniere's management and to ask questions of and receive
answers from Cheniere concerning the business (both current and proposed) of
Cheniere. Crest acknowledges that all such questions, if any, have been answered
to its full satisfaction and that Crest has received all information about
Cheniere which Crest desires, including information which it deems necessary to
verify the accuracy of information Cheniere has provided to Crest.

                                   ARTICLE III

                REPRESENTATIONS AND WARRANTIES OF CHENIERE & CXY

     Cheniere and CXY jointly and severally represent and warrant to Crest and
Crest Energy as follows:

     3.01 Organization. Cheniere is a corporation duly organized, validly
          ------------
existing and in good standing under the laws of the State of Delaware and has
all requisite power and authority to own, lease and operate its assets and to
carry on its business as it is now being conducted. Cheniere is duly qualified
to do business in each jurisdiction in which such qualification is

                                       7
<PAGE>

required, except where its failure to be qualified would not have a material
adverse effect on its operations or financial condition. CXY is a corporation
duly organized, validly existing and in good standing under the laws of the
State of Delaware and has all requisite power and authority to own, lease and
operate its assets and to carry on its business as it is now being conducted.
CXY is duly qualified to do business in each jurisdiction in which such
qualification is required, except where its failure to be qualified would not
have a material adverse effect on its operations or financial condition.

     3.02 Authority; Validity; Conflicts. This Agreement has been duly
          ------------------------------
authorized, executed and delivered by each of Cheniere and CXY and constitutes
the valid and legally binding agreement and obligation of each of Cheniere and
CXY, enforceable against each in accordance with its terms, except insofar as
the enforceability thereof may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws affecting the enforcement of
creditors' rights generally and by general principles of equity. Upon execution
and delivery of the agreements, certificates or other documents contemplated
hereby to be executed by Cheniere and/or CXY, such agreements, certificates or
documents will be enforceable against Cheniere and/or CXY in accordance with
their respective terms, except insofar as the enforceability thereof may be
limited by applicable bankruptcy, insolvency, reorganization, moratorium or
other similar laws affecting the enforcement of creditors' rights generally and
by general principles of equity. The execution and delivery by Cheniere and/or
CXY of this Agreement does not, and the execution and delivery by Cheniere
and/or CXY of the agreements, certificates and other documents contemplated
hereby and the consummation by Cheniere and/or CXY of the transactions
contemplated hereby will not, violate any provision of the organizational
documents of Cheniere and/or CXY, or violate any provision of, or create any
conflict with, or result in the acceleration of any obligation under, or
constitute a default under, any material loan agreement, indenture, lease,
mortgage, deed of trust, financing agreement, contract, instrument or any other
material commitment or agreement to which Cheniere and/or CXY are subject.

     3.03 Capital Stock and Other Securities. Upon their issuance in accordance
          ----------------------------------
with the terms of this agreement the shares included in the Share Consideration
will be validly issued and outstanding, fully paid and nonassessable. None of
such shares will be issued in violation of the preemptive rights of any person.
Upon the delivery to Crest of certificates representing the Share Consideration
as contemplated by this Agreement, and without the consent or approval of any
other party, good and marketable title to such shares shall be vested in Crest,
free and clear of all liens, options, charges, equities, encumbrances and claims
of any kind.

     3.04 Brokers. Cheniere has not engaged the services of any broker or finder
          -------
or incurred any liability for brokerage fees, finders' fees, agents' commissions
or other forms of compensation in connection with the transactions set forth in
this Agreement in a manner that will result in any liability on the part of
Crest Energy, Crest or Freeport.

     3.05 SEC Documents. Cheniere has furnished Crest with a true and complete
          -------------
copy of all documents filed with the Commission since December 31, 2000. Such
documents are all the documents that Cheniere has been required to file with the
SEC since December 31, 2000. As of its filing date (and, with respect to any
registration statement, the date on which it or any post-effective amendment was
declared effective), each such document was in compliance, in all

                                       8
<PAGE>

material respects, with the applicable requirements of the Securities Act and
the Exchange Act, contained no untrue statement of a material fact and did not
omit any statement of a material fact required to be stated therein or necessary
to make the statements therein, in light of the circumstances under which they
were made, not misleading. The financial statements of Cheniere included in such
documents complied, at the time of filing with the Commission (and, with respect
to any registration statement, the time it was declared effective), as to form,
in all material respects, with applicable accounting requirements and the
published rules and regulations of the Commission with respect thereto, were
prepared in accordance with U.S. Generally Accepted Accounting Principles
applied on a consistent basis during the periods involved (subject, in the case
of unaudited statements, to the omission of certain footnotes) and fairly
present, in all material respects (subject, in the case of the unaudited
statements, to normal, recurring year-end audit adjustments) the consolidated
financial position of Cheniere and its consolidated subsidiaries as of the dates
thereof and the consolidated results of their operations for the periods
presented. Since March 31, 2001, there has not been any change in the business,
assets, financial condition or results of operations of Cheniere or any of its
subsidiaries, which in any case would have a material adverse effect on, or with
respect to, Cheniere or CXY. Notwithstanding anything to the contrary herein,
the foregoing sentences of this Section 3.05 shall not apply to information with
                                ------------
respect to selling stockholders or provided in the plan of distribution in any
of Cheniere's registration statements on Form S-3 filed with the Commission.

                                   ARTICLE IV

                               CLOSING PROCEDURES

     The closing of the purchase and sale of the Interests and the other
transactions contemplated hereby (the "Closing") shall take place on the date
hereof (the "Closing Date") at such place as may be mutually agreed upon by the
parties. At the Closing, (a) Cheniere shall deliver or cause to be delivered to
Crest duly executed stock certificates evidencing the Closing Shares, the
Release duly executed by Cheniere and the Agreed Motion and Order executed by
Cheniere or its counsel, (b) Crest will deliver or cause to be delivered to
Cheniere a duly executed assignment, in form and substance reasonably
satisfactory to Cheniere, of the Interests, the Release duly executed by Crest
and the Agreed Motion and Order duly executed by Crest or its counsel and (c)
Daniel will deliver or cause to be delivered the Release duly executed by Daniel
and the Agreed Motion and Order duly executed by Daniel or his counsel.

                                    ARTICLE V

                                 INDEMNIFICATION

     5.01 Indemnification by Crest Energy and Crest. Crest Energy and Crest,
          -----------------------------------------
jointly and severally, hereby agree to indemnify, defend and hold Cheniere, and
its subsidiaries, affiliates, officers, directors, employees, shareholders and
agents (collectively, the "Cheniere Indemnified Persons") harmless from and
against any and all demands, suits, claims, actions or causes of action,
assessments, losses, damage, liabilities, liens, settlements, penalties, and
forfeitures, and reasonable costs and expenses incident thereto (including
reasonable attorneys' fees) (collectively, the "Indemnity Losses"), asserted
against or suffered or incurred, directly or indirectly, by any of the Cheniere
Indemnified Persons and resulting from (a) any breach of any

                                       9
<PAGE>

representation or warranty or covenant made by Crest Energy or Crest herein or
in any certificate or writing furnished by Crest or Crest Energy pursuant to
this Agreement or (b) the filing by Crest or any other person or entity acting
by, through or for Crest of any lawsuit or other legal action asserting any
claim or theory of recovery asserted by Crest in the Lawsuit or released in the
Release against any of the Crest Indemnified Parties, in any forum.

     5.02 Indemnification by Cheniere and CXY. Cheniere and CXY hereby jointly
          -----------------------------------
and severally agree to indemnify, defend and hold Crest Energy, Crest and Daniel
their respective subsidiaries, affiliates, officers, directors, employees,
shareholders and agents (collectively, the "Crest Indemnified Persons") harmless
from and against any and all Indemnity Losses asserted against or suffered or
incurred, directly or indirectly, by any of the Crest Indemnified Persons and
resulting from (a) any breach of any representation or warranty or covenant made
by Cheniere or CXY herein or in any certificate or writing furnished by Cheniere
or CXY pursuant to this Agreement; or (b) the filing by Cheniere or any other
person or entity acting by, through or for Cheniere of any lawsuit or other
legal action asserting any claim or theory of recovery asserted by Cheniere in
the Lawsuit or released in the Release against any of the Crest Indemnified
Parties, in any forum.

     5.03 Procedures Relating to Indemnification Among Parties. Following the
          ----------------------------------------------------
discovery of any facts or conditions which could reasonably be expected to give
rise to an Indemnity Loss or Indemnity Losses for which indemnification under
this Article V can be obtained, the party seeking indemnification under this
     ---------
Article V (the "Indemnified Party") shall, within thirty (30) days thereafter,
---------
provide written notice to the party from whom indemnification is sought (the
"Indemnifying Party"), setting forth the facts and circumstances, in reasonable
detail, relating to such Indemnity Loss or Indemnity Losses and the amount of
Indemnity Loss or Indemnity Losses (or a non-binding, reasonable estimate
thereof if the actual amount is not known or not capable of reasonable
calculation) ("Indemnification Notice"). The failure to provide such notice to
the Indemnifying Party in a timely manner shall not affect the underlying
indemnity claim except to the extent that the Indemnifying Party is materially
prejudiced thereby and except that, for purposes of Section 5.03, a notice
                                                    ------------
concerning the breach of a Surviving Representation must be delivered before
such Surviving Representation terminates pursuant to Section 5.05.
                                                     ------------

     5.04 Procedures Relating to Indemnification for Third Party Claims.
          -------------------------------------------------------------

     In order for an Indemnified Party to be entitled to any indemnification
provided for under this Agreement arising out of or involving a claim or demand
made by any other person, firm, governmental authority or corporation (a "Third
Party Claim"), the Indemnified Party must provide an Indemnification Notice to
the Indemnifying Party relating to the Third Party Claim within thirty (30) days
after receipt by such Indemnified Party of written notice of the Third Party
Claim. Thereafter, the Indemnified Party shall deliver to the Indemnifying
Party, within five (5) business days after the Indemnified Party's receipt
thereof, copies of all notices and documents (including court papers) received
by the Indemnified Party relating to the Third Party Claim. The failure to
provide such notice or deliver such copies to the Indemnifying Party in a timely
manner shall not affect the underlying indemnity claim except to the extent that
the Indemnifying Party is materially prejudiced thereby.

                                       10
<PAGE>

     If a Third Party Claim is made against the Indemnified Party, the
Indemnifying Party shall be entitled to participate in the defense thereof and,
if the Indemnifying Party so chooses and acknowledges in writing its obligation
to indemnify the Indemnified Party therefor, to assume the defense thereof with
counsel selected by the Indemnifying Party and reasonably satisfactory to the
Indemnified Party. Should the Indemnifying Party so elect to assume the defense
of a Third Party Claim, the Indemnifying Party shall not be liable to the
Indemnified Party for legal expenses subsequently incurred by the Indemnified
Party in connection with the defense thereof as long as the Indemnifying Party
continues to defend actively and in good faith such claim. If the Indemnifying
Party assumes such defense, then the Indemnified Party shall have the right to
participate in the defense thereof and to employ counsel, at its own expense,
separate from the counsel employed by the Indemnifying Party, it being
understood, however, that the Indemnifying Party shall control such defense. The
Indemnifying Party shall be liable for the fees and expenses of counsel employed
by the Indemnified Party during which the Indemnifying Party has not assumed the
defense thereof. If the Indemnifying Party chooses to defend any Third Party
Claim, the Indemnifying Party shall have the right to control the defense,
compromise or settlement of such matter, and all the parties hereto shall
cooperate in the defense or prosecution of such Third Party Claim, with the
out-of-pocket expenses of all such cooperation requested by the Indemnifying
Party, if any, to be borne by the Indemnifying Party. Notwithstanding the
foregoing, the Indemnifying Party shall not compromise or settle any Third Party
Claim without the consent of the Indemnified Party, unless such compromise or
settlement involves only the payment of monetary damages by the Indemnifying
Party and includes a full release of the Indemnified Party from all liability
with respect to such Third Party Claim. If the Indemnifying Party, within a
reasonable time after receipt of an Indemnification Notice relating to a Third
Party Claim, chooses not to assume defense of a Third Party Claim or fails to
defend such Third Party Claim actively and in good faith, the Indemnified Party
will (upon further notice) have the right to undertake the defense, compromise
or settlement of such Third Party Claim or consent to the entry of judgment with
respect to such Third Party Claim, on behalf of, and for the account and risk
of, the Indemnifying Party, and the Indemnifying Party shall have no right to
challenge the Indemnifying Party's defense, compromise, settlement or consent to
judgment.

     5.05 Survival. All covenants and agreements shall survive the Closing
          --------
without limitation. All representations and warranties made by the parties shall
survive the Closing and shall thereafter terminate two years after the Closing
Date except that the representations and warranties contained in Sections 2.02,
                                                                 -------------
2.03 and 3.03 hereof shall survive without limitation. It is specifically
----     ----
understood and agreed that any claim for indemnification under this Article V
                                                                    ---------
shall survive after such two-year period only if related to a claim for breach
of a covenant or agreement or if a Claim Notice with respect to such claim is
provided to the party to provide the indemnification before the end of such
two-year period, except with respect to indemnification claims arising from
alleged breaches of the representations and warranties contained in Sections
                                                                    --------
2.02, 2.03 and 3.03.
----  ----     ----

     5.06 No Election. In the absence of fraud, the indemnification rights
          -----------
provided in this Article V shall be the sole and exclusive remedy available to
                 ---------
each of the parties to this Agreement for any misrepresentation, breach of
warranty or failure to fulfill any covenant or agreement contained herein.

                                       11
<PAGE>

                                   ARTICLE VI

                                  ANTI-DILUTION

     6.01 Anti-Dilution Provisions. Cheniere and Crest have agreed that the
          ------------------------
number of Contingent Shares shall be 750,000 based on a deemed value of such
shares of $2.50 per share (the "Deemed Value"). The number of Contingent Shares
issuable by Cheniere and the Deemed Value shall be subject to adjustment, as
provided in this Article VI. Upon each adjustment of the Deemed Value, Cheniere
                 ---------
shall be obligated to issue, based on the Deemed Value resulting from such
adjustment, the number of shares of Cheniere Common Stock obtained by
multiplying the Deemed Value in effect immediately prior to such adjustment by
the number of shares that would have been issuable pursuant hereto immediately
prior to such adjustment and dividing the product thereof by the Deemed Value
resulting from such adjustment.

     6.02 Adjustment of Deemed Value Upon Issuance of Cheniere Common Stock.
          ------------------------------------------------------------------

          (a) (i) If and whenever after the date hereof Cheniere shall issue or
sell any Cheniere Common Stock for no consideration or for a consideration per
share less than the Deemed Value, then, forthwith upon such issue or sale, the
Deemed Value shall be reduced (but not increased, except as otherwise
specifically provided in Section 6.02(b)(iii) hereof), to the price (calculated
                         -------------------
to the nearest one-ten thousandth of a cent) determined by dividing (x) an
amount equal to the sum of (i) the aggregate number of shares of Cheniere Common
Stock outstanding immediately prior to such issue or sale multiplied by then
existing Deemed Value plus (ii) the consideration received by Cheniere upon such
issue or sale by (y) the aggregate number of shares of Cheniere Common Stock
outstanding immediately after such issue or sale.

          (ii) Notwithstanding the provisions of this Section 6.02 no adjustment
                                                      ------------
shall be made in the Deemed Value in the event that Cheniere issues, in one or
more transactions, (i) Cheniere Common Stock or convertible securities upon
exercise of any options issued to officers, directors or employees of Cheniere
pursuant to a stock option plan or an employment, severance or consulting
agreement as now or hereafter in effect, in each case approved by the Board of
Directors (provided that the aggregate number of shares of Cheniere Common Stock
which may be issuable, including options issued prior to the date hereof, under
all such employee plans and agreements shall at no time exceed the number that
is twice the number of such shares of Cheniere Common Stock that are issuable
under currently effective employee plans and agreements); (ii) Cheniere Common
Stock upon exercise of any stock purchase warrant or option (other than the
option referred to in clause (i) above) or other convertible security
outstanding on the date hereof; or (iii) Cheniere Common Stock issued as
consideration in, or in connection with, acquisitions by Cheniere. In addition,
for purposes of calculating any adjustment of the Deemed Value as provided in
this Section 6.02(a), all of the shares of Cheniere Common Stock issuable
     ---------------
pursuant to any of the foregoing shall be assumed to be outstanding prior to the
event causing such adjustment to be made.

          (b) For purposes of this Section 6.02, the following Sections
                                   ------------                ---------
6.02(b)(i) to 6.02(b)(v) inclusive, shall be applicable:
----------    ----------

                                       12
<PAGE>

          (i) Issuance of Convertible Securities, Rights or Options. In case at
              -----------------------------------------------------
any time after the date hereof Cheniere shall in any manner grant (whether
directly or by assumption in a merger or otherwise) any rights to subscribe for
or to purchase, or any options for the purchase of, Cheniere Common Stock of any
stock or securities convertible into or exchangeable for Cheniere Common Stock
(such convertible or exchangeable stock or securities being herein called
"Convertible Securities"), whether or not such rights or options or the right to
convert or exchange any such Convertible Securities are immediately exercisable,
and the price per share for which shares of Cheniere Common Stock are issuable
upon the exercise of such rights or options or upon conversion or exchange of
such Convertible Securities (determined by dividing (A) the total amount, if
any, received or receivable by Cheniere as consideration for granting of such
rights or options, plus the minimum aggregate amount of additional
consideration, if any, payable to Cheniere upon the exercise of such rights or
options, or plus, in the case of such rights or options that relate to
Convertible Securities, the minimum aggregate amount of additional
consideration, if any, payable upon the issue or sale of such Convertible
Securities and upon the conversion or exchange thereof, by (B) the total maximum
number of shares of Cheniere Common Stock issuable upon the exercise of such
rights or options or upon the conversion or exchange of all such Convertible
Securities issuable upon the exercise of such rights or options) shall be less
than the Deemed Value in effect as of the date of granting such rights or
options, then the total maximum number of shares of Cheniere Common Stock
issuable upon the exercise of such rights or options or upon conversion or
exchange of all such Convertible Securities issuable upon the exercise of such
rights or options shall be deemed to be outstanding as of the date of the
granting of such rights or options and to have been issued for such price per
share, with the effect on the Deemed Value specified in Section 6.02(a) hereof.
                                                        ---------------
Except as provided in Section 6.02(b) hereof, no further adjustment of the
                      --------------
Deemed Value shall be made upon the actual issuance of such Cheniere Common
Stock or of such Convertible Securities upon exercise of such rights or options
or upon the actual issuance of such Cheniere Common Stock upon conversion or
exchange of such Convertible Securities.

          (ii) Change in Option Price or Conversion Rate. Upon the happening of
               -----------------------------------------
any of the following events, namely, if the purchase price provided for in any
Convertible Security, right or option referred to in Section 6.02(b), the
                                                     ---------------
additional consideration, if any, payable upon the conversion or exchange of any
Convertible Securities referred to in Section 6.02(b), or the rate at which any
                                      ---------------
Convertible Securities referred to in Section 6.02(b), are convertible into or
                                      ---------------
exchangeable for Cheniere Common Stock shall change (other than under or by
reason of provisions designed to protect against dilution), the Deemed Value
then in effect hereunder shall forthwith be readjusted (increased or decreased,
as the case may be) to the Deemed Value that would have been in effect at such
time had such rights, options or Convertible Securities still outstanding
provided for such changed purchase price, additional consideration or conversion
rate, as the case may be, at the time initially granted, issued or sold. On the
expiration of any such option or right referred to in Section 6.02(b), or on the
                                                      ---------------
termination of any such right to convert or exchange any such Convertible
Securities referred to in Section 6.02(b), the Deemed Value then in effect
                          ---------------
hereunder shall forthwith be readjusted (increased or deceased, as the case may
be) to the Deemed Value that would have been in effect at the time of such
expiration or termination had such right, option or Convertible Securities, to
the extent outstanding immediately prior to such expiration or termination,
never been granted, issued or sold, and the Cheniere Common Stock issuable
thereunder shall no longer be deemed to be outstanding. If the purchase price
provided for in Section 6.02(b) or the rate at which any Convertible Securities
                ---------------

                                       13
<PAGE>

referred to in Section 6.02(b) reduced at any time under or by reason of
               ---------------
provisions with respect thereto designed to protect against dilution, then in
case of the delivery of Cheniere Common Stock upon the exercise of any such
right or option or upon conversation or exchange of any such Convertible
Securities, the Deemed Value then in effect hereunder shall, if not already
adjusted, forthwith be adjusted to such amount as would have obtained had such
right, option or Convertible Securities never been issued as to such Cheniere
Common Stock and had adjustments been made upon the issuance of the Cheniere
Common Stock delivered as aforesaid, but only if as a result of such adjustment
the Deemed Value then in effect hereunder is thereby reduced.

          (iii) Consideration for Stock. In case at any time Cheniere Common
                -----------------------
Stock or Convertible Securities or any rights or options to purchase any such
Cheniere Common Stock or Convertible Securities shall be issued or sold for
cash, the consideration therefor shall be deemed to be the amount received by
Cheniere therefor. In case at any time any Cheniere Common Stock, Convertible
Securities or any rights or options to purchase any such Cheniere Common Stock
or Convertible Securities shall be issued or sold for consideration other than
cash, the amount of the consideration other than cash received by Cheniere shall
be deemed to be the fair value of such consideration, determined reasonably and
in good faith by the Board of Directors of Cheniere. In case at any tine any
Cheniere Common Stock, Convertible Securities or any rights or options to
purchase any Cheniere Common Stock or Convertible Securities shall be issued in
connection with any merger or consolidation in which Cheniere is the surviving
corporation, the amount of consideration received therefor shall be deemed to be
the fair value, as determined reasonably and in good faith by the Board of
Directors of Cheniere, of such portion of the assets and business of the
nonsurviving corporation as such Board of Directors may determine to be
attributable to such Cheniere Common Stock, Convertible Securities, rights or
options as the case may be. In case at any time any rights or options to
purchase any shares of Cheniere Common Stock or Convertible Securities shall be
issued in connection with the issuance and sale of other securities of Cheniere,
together consisting of one integral transaction in which no consideration is
allocated to such rights or options by the parties, such rights or options hall
be deemed to have been issued with consideration.

          (iv) Record Date. In the case Cheniere shall take a record of the
               -----------
holders of Cheniere Common Stock for the purpose of entitling them (i) to
receive a dividend or other distribution payable in Cheniere Common Stock or
Convertible Securities, or (ii) to subscribe for or purchase Cheniere Common
Stock or Convertible Securities, then such record date shall be deemed to be the
date of the issuance or sale of the Cheniere Common Stock or Convertible
Securities deemed to have been issued or sold as a result of the declaration of
such dividend or the making of such other distribution or the date of the
granting of such right of subscription or purchase, as the case may be.

          (v) Treasury Shares. The number of shares of Cheniere Common Stock
              ---------------
outstanding at any given time shall not include shares owned directly by
Cheniere in treasury, and the disposition of any such shares shall be considered
an issuance or sale of Cheniere Common Stock for the purpose of this Section
                                                                     -------
6.02.
----

     6.03 Stock Dividends. In case Cheniere shall declare a dividend or make any
          ---------------
other distribution upon any shares of Cheniere, payable in Cheniere Common Stock
or Convertible

                                       14
<PAGE>

Securities, any Cheniere Common Stock or Convertible Securities, as the case may
be, issuable in payment of such dividend or distribution shall be deemed to have
been issued or sold without consideration.

     6.04 Stock Splits and Reverse Splits. In the event that Cheniere shall at
          -------------------------------
any time subdivide its outstanding shares of Cheniere Common Stock into a
greater number of shares, the Deemed Value in effect immediately prior to such
combination shall be proportionately decreased and the number of Contingent
Shares issuable immediately prior to such combination shall be proportionately
increased, and conversely, in the event that the outstanding shares of Cheniere
Common Stock shall at any time be combined into a smaller number of shares, the
Deemed Value in effect immediately prior to such combination shall be
proportionately increased and the number of Contingent Shares issuable
immediately prior to such combination shall be proportionately reduced. Except
as provided in this Section 6.04, no adjustment in the Deemed Value and no.
                    ------------
change in the number of Contingent Shares issuable shall be made under this
Article VI as a result of or by reason of any such subdivision or combination.
----------

     6.05 Reorganizations and Asset Sales. If any capital reorganization or
          -------------------------------
reclassification of the capital stock of Cheniere, or any consolidation, merger
or share exchange of Cheniere with another person, or the sale, transfer or
other disposition of all or substantially all of its assets to another person
shall be effected in such a way that a holder of Cheniere Common Stock of
Cheniere shall be entitled to receive capital stock, securities or assets with
respect to or in exchange for their shares, then the following provisions shall
apply:

          (a) As a condition of such reorganization, reclassification,
consolidation, merger, share exchange, sale, transfer or other disposition
(except as otherwise provided below in this Section 6.05), lawful and adequate
                                            ------------
provisions shall be made whereby Crest shall thereafter have the right to
receive upon the terms and conditions specified in this Agreement and in lieu of
the Contingent Shares immediately theretofore receivable upon the exercise of
the rights represented hereby, such shares of capital stock, securities or
assets as may be issued or payable with respect to or in exchange for a number
of outstanding shares of such Cheniere Common Stock equal to the number of
Contingent Shares immediately theretofore so receivable had such reorganization,
reclassification, consolidation, merger, share exchange or sale not taken place,
and in any such case appropriate provision reasonably satisfactory to Crest
shall be made with respect to the rights and interests of Crest to the end that
the provisions hereof (including, without limitation, provisions for adjustments
of the Deemed Value and of the number of Contingent Shares receivable upon the
exercise) shall thereafter be applicable, as nearly as possible, in relation to
any shares of capital stock, securities or assets thereafter deliverable upon
the occurrence of an Issuance Event.

          (b) In the event of a merger, share exchange or consolidation of
Cheniere with or into another person as a result of which a number of shares of
common stock or its equivalent of the successor person greater or lesser than
the number of shares of Cheniere Common Stock outstanding immediately prior to
such merger, share exchange or consolidation are issuable to holders of Cheniere
Common Stock, then the Deemed Value in effect immediately prior to such merger,
share exchange or consolidation shall be adjusted in the same manner as though
there were a subdivision or combination of the outstanding shares of Cheniere
Common Stock.

                                       15
<PAGE>

          (c) Cheniere shall not effect any such consolidation, merger, share
exchange, sale, transfer or other disposition unless prior to or simultaneously
with the consummation thereof the successor person (if other than Cheniere)
resulting from such consolidation, share exchange or merger or the person
purchasing or otherwise acquiring such assets shall have assumed by written
instrument executed and mailed or delivered to Crest the obligation to deliver
to Crest such shares of capital stock, securities or assets as, in accordance
with the foregoing provisions, Crest may be entitled to receive.

     6.06 Adjustment for Asset Distribution. If Cheniere declares a dividend or
          ---------------------------------
other distribution payable to all holders of shares of Cheniere Common Stock in
evidence of indebtedness of Cheniere or other assets of Cheniere (including,
cash (other than regular cash dividends declared by the Board of Directors),
capital stock (other than Cheniere Common Stock, Convertible Securities or
options or rights thereto) or other property), the Deemed Value in effect
immediately prior to such declaration of such dividend or other distribution
shall be reduced by an amount equal to the amount of such dividend or
distribution payable per share of Cheniere Common Stock, in the case of a cash
dividend or distribution, or by the fair value of such dividend or distribution
per share of Cheniere Common Stock (as reasonably determined in good faith by
the Board of Directors of Cheniere), in the case of any other dividend or
distribution. Such reduction shall be made whenever any such dividend or
distribution is made and shall be effective as of the date as of which a record
is taken for purpose of such dividend or distribution or, if a record is not
taken, the date as of which holders of record of Cheniere Common Stock entitled
to such dividend or distribution are determined.

     6.07 De Minimus Adjustments. No adjustments in the number of shares of
          ----------------------
Cheniere Common Stock issuable hereunder shall be required unless such
adjustment would require an increase or decrease of at least one share of
Cheniere Common Stock issuable upon the occurrence of an Issuance Event and no
adjustment in the Deemed Value shall be required unless such adjustment would
require an increase or decrease of at least $0.01 in the Deemed Value; provided,
however, that any adjustments which by reason of this Section 6.07 are not
                                                      ------------
required to be made shall be carried forward and taken into account in any
subsequent adjustment. All calculations shall be made to the nearest full share
or nearest one hundredth of a dollar, as applicable.

     6.08 Expiration. Crest's rights to antidilution protection under this
          ----------
Article VI shall expire on the latter of (i) the date of the Issuance Event and
(ii) the date that is the fifth anniversary of the Closing Date.

                                   ARTICLE VII

                                  MISCELLANEOUS

     7.01 Expenses. Except as otherwise specifically provided in this Agreement,
          --------
each party hereto shall bear its own expenses incurred incident to the
negotiation and preparation of this Agreement and the sale of the Interests
hereunder, including fees of counsel, accountants and other advisors.

                                       16
<PAGE>

     7.02 Parties Bound. Except to the extent otherwise expressly provided
          -------------
herein, this Agreement shall be binding upon and inure to the benefit of the
parties hereto and their respective heirs, representatives, administrators,
guardians, successors and assigns; and no other person shall have any right,
benefit or obligation hereunder.

     7.03 Notices. Any notice, request, instruction or other document to be
          -------
given hereunder by any party to another shall be in writing, and delivered
personally or mailed by certified or registered mail, postage prepaid, at the
following addresses (or at such other address for a party or shall be specified
by like notice):

     If to Cheniere, addressed to:

          Cheniere Energy, Inc.
          333 Clay Street, Suite 3400
          Houston, Texas 77002
          Attention:  Charles M. Reimer

     With a copy (which shall not constitute notice) to:

          Mayor, Day, Caldwell & Keeton, L.L.P.
          700 Louisiana, Suite 1900
          Houston, Texas 77002
          Attention:  Dillon J. Ferguson

     If to CXY:

          CXY Corporation
          333 Clay Street, Suite 3400
          Houston, Texas  77002
          Attention:  Charles M. Reimer

     With a copy (which shall not constitute notice) to:

          Mayor, Day, Caldwell & Keeton, L.L.P.
          700 Louisiana, Suite 1900
          Houston, Texas 77002
          Attention:  Dillon J. Ferguson

     If to Crest Energy, addressed to:

          Crest Energy, L.L.C.
          600 Travis, Suite 6800
          Houston, Texas  77002
          Attention:  Joseph Peacock

                                       17
<PAGE>

     With a copy (which shall not constitute notice) to:

          Locke Liddell & Sapp LLP
          600 Travis Street, Suite 3400
          Houston, Texas 77002
          Attention: Marcus A. Watts

     If to Crest, addressed to:

          Crest Energy, L.L.C.
          600 Travis, Suite 6800
          Houston, Texas  77002
          Attention:  Joseph Peacock

     With a copy (which shall not constitute notice) to:

          Locke Liddell & Sapp LLP
          600 Travis Street, Suite 3400
          Houston, Texas 77002
          Attention: Marcus A. Watts

     If to Daniel, addressed to:

          Jamal Daniel
          Crest Energy, L.L.C.
          600 Travis, Suite 6800
          Houston, Texas  77002

     7.04 CHOICE OF LAW. THIS AGREEMENT SHALL BE CONSTRUED, INTERPRETED, AND THE
          -------------
RIGHTS OF THE PARTIES DETERMINED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF
TEXAS REGARDLESS OF THE LAWS THAT MIGHT OTHERWISE GOVERN UNDER APPLICABLE
PRINCIPLES OF CONFLICT OF LAWS THEREOF, EXCEPT WITH RESPECT TO MATTERS OF LAW
CONCERNING THE INTERNAL AFFAIRS OF ANY CORPORATE ENTITY WHICH IS A PARTY TO OR
THE SUBJECT OF THIS AGREEMENT, AND AS TO THOSE MATTERS THE LAW OF THE STATE OF
INCORPORATION OR ORGANIZATION OF THE RESPECTIVE ENTITY SHALL GOVERN. VENUE FOR
ALL DISPUTES ARISING UNDER THIS AGREEMENT SHALL BE HARRIS COUNTY, TEXAS.

     7.05 Entire Agreement: Amendments and Waivers. This Agreement, together
          ----------------------------------------
with all exhibits and schedules hereto, constitutes the entire Agreement between
the parties pertaining to the subject matter hereof and supersedes all prior and
contemporaneous agreements, understandings, negotiations and discussions,
whether oral or written, of the parties, and there are no warranties,
representations or other agreements between the parties in connection with the
subject matter hereof except as set forth specifically herein or contemplated
hereby. No supplement, modification or waiver of this Agreement shall be binding
unless it shall be specifically designated to be a supplement, modification or
waiver of this Agreement and shall

                                       18
<PAGE>

be executed in writing by each party to be bound thereby. No waiver of any of
the provisions of this Agreement shall be deemed or shall constitute a waiver of
any other provision hereof (whether or not similar), nor shall such waiver
constitute a continuing waiver unless otherwise expressly provided.

     7.06 Assignment. This Agreement may not be assigned by operation of law or
          ----------
otherwise; provided, however, that each of Crest Energy, Crest and Cheniere
shall have the right to assign its rights under this Agreement, at any time upon
written notice to the other, to any person or entity controlling, controlled by
or under common control with the assigning party, provided that the assigning
party remains fully liable for its obligations hereunder and that the assignee
assumes all of the assigning party's obligations hereunder.

     7.07 Further Assurances. From time to time hereafter and without further
          ------------------
consideration, the parties shall execute and deliver such additional or further
instruments of conveyance, assignment and transfer and take such actions as any
party may reasonably request in order to more effectively convey and transfer to
CXY the Interests deliverable to CXY or the Share Consideration deliverable to
Crest hereunder or as shall be reasonably necessary or appropriate in connection
with the carrying out of the obligations of the parties hereunder or the
purposes of this Agreement.

     7.08 Multiple Counterparts. This Agreement may be executed in one or more
          ---------------------
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

     7.09 Headings. The headings of the several articles and sections herein are
          --------
inserted for convenience of reference only and are not intended to be a part of
or to affect the meaning or interpretation of this Agreement.

     7.10 Severability. Each article, section, subsection and lesser section of
          ------------
this Agreement constitutes a separate and distinct undertaking, covenant or
provision hereof. In the event that any provision of this Agreement shall
finally be determined to be unlawful, such provision shall be deemed severed
from this Agreement, but every other provision of this Agreement shall remain in
full force and effect.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement
effective as of the date first above written.

                                        CHENIERE ENERGY, INC.

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

                                       19
<PAGE>

                                        CXY

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

                                        CREST INVESTMENT COMPANY

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

                                       20
<PAGE>

                                        CREST ENERGY, L.L.C.

                                        By:
                                           -------------------------------------
                                                 Dee S. Osborne, Manager

                                        FREEPORT LNG, LLC

                                        By:
                                           -------------------------------------
                                                 Dee S. Osborne, Manager

                                        -------------------------------------
                                        JAMAL DANIEL, Individually

                                       21

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