Document:

<PAGE>

                                                                    EXHIBIT 10.1

                                COMMON AGREEMENT

     This COMMON AGREEMENT, dated as of March 12, 2007, is made and entered into
by and between CMS Enterprises Company, a Michigan corporation ("CMS"), and
Lucid Energy, LLC, a Michigan limited liability company ("Lucid").

                                   WITNESSETH:

     WHEREAS, CMS, through certain of its subsidiaries, is engaged in
Michigan-based natural gas transmission, gathering, storage and processing
businesses (the "Michigan Businesses") as well as Argentina-based natural gas
transmission and marketing and independent power production businesses (the
"Argentine Businesses" and collectively with the Michigan Businesses, the
"Businesses") and directly or indirectly holds related options and rights that
CMS or its Affiliates intend to grant to Lucid in conjunction with the
Businesses pursuant to separate agreements;

     WHEREAS, CMS and Lucid and their respective Affiliates contemporaneously
herewith are entering into separate Agreements of Purchase and Sale in the forms
of Annex A (the "Argentine Sale Agreement") and Annex B (the "Michigan Sale
Agreement") relating to the sales of the Argentine Businesses and the Michigan
Businesses, respectively. The Argentine Sale Agreement and the Michigan Sale
Agreement collectively are referred to as the "Sale Agreements." When used in
this Common Agreement in connection with either or both of the Sale Agreements,
the terms "Seller" and "Buyer" shall mean the entities named as Seller and Buyer
in Annex A and Annex B, as applicable.

     WHEREAS, it is the intention of CMS and Lucid that each of the transactions
contemplated by this Common Agreement and by the Sale Agreements, as well as the
grant of the related options and rights, will be consummated if and only if all
such transactions are consummated concurrently;

     NOW, THEREFORE, in consideration of the Buyer and Seller entering into the
Sale Agreements and CMS or its Affiliates granting Lucid or its Affiliates the
options and rights, and other good and valuable consideration the adequacy and
receipt of which are hereby acknowledged, the parties hereby agree as follows:

     1. Contemporaneous Closing and Grant; Aggregate Consideration.

     (a) CMS and Lucid hereby agree that the consummation of the transactions
contemplated by each of the Argentine Sale Agreement and the Michigan Sale
Agreement, as well as the grant of the options and rights, will only occur if
each such consummation occurs simultaneously under both of the Sale Agreements.
Notwithstanding the foregoing, the obligations and rights under each of the
Argentine Sale Agreement and the Michigan Sale Agreement accrue solely to the
respective Buyer and Seller as defined therein in Annex A and Annex B.

<PAGE>
     (b) At the contemporaneous consummation of the transactions contemplated
under the Sale Agreements, Lucid hereby agrees to cause the aggregate purchase
price under the Sale Agreements of One Hundred Eighty Million Dollars
($180,000,000), less the amount paid to CMS Generation Co. in connection with
the Empresa Nacional de Electricidad S.A. exercise of its right of first offer
for certain shares owned by CMS Generation Co., to be paid to CMS or its
designated Seller entities in order to so consummate the transactions
contemplated by of each of the Argentine Sale Agreement and the Michigan Sale
Agreement according to their respective terms.

     (c) Notwithstanding that the consummation of the transactions contemplated
by the Sale Agreements are contemporaneous and include the same parties, the
transactions under the Sale Agreements are separate transactions and each of
them shall stand alone. Neither party shall assert or set off any rights or
claims or obligations that are involved, arise or are created under one Sale
Agreement against any rights, claims or obligations owed or receivable under the
other Sale Agreement.

     2. Further Assurances. CMS and Lucid agree that each of them shall enter
into such additional agreements and deliver such documents and instruments as
either of them deems reasonably necessary or appropriate to effect the
contemporaneous Closings under the Sale Agreements and the grant of the Options
and Rights as well as such related actions and transactions as are necessary to
effect the transactions contemplated by this Common Agreement or the Sale
Agreements.

     3. Miscellaneous. All of the provisions in Article VII of the Michigan Sale
Agreement shall apply to this Common Agreement as if they were set forth herein.

     IN WITNESS WHEREOF, CMS and Lucid, by their duly authorized officers or
managers, have executed this Agreement as of the date first written above.

CMS Enterprises Company                 Lucid Energy, LLC

By: /s/ Thomas W. Elward                By: /s/ Rai Bhargava
    ---------------------------------       ------------------------------------
    Thomas W. Elward                    Name: Rai Bhargava
Its: President and Chief Operating      Its: Chairman & CEO
     Officer<PAGE>

                                                                    EXHIBIT 10.2

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

                         AGREEMENT OF PURCHASE AND SALE

                                 BY AND BETWEEN

             CMS ENTERPRISES COMPANY AND CMS ENERGY INVESTMENT LLC,

                             COLLECTIVELY AS SELLER,

                                       AND

         LUCID ENERGY, L.L.C. AND MICHIGAN PIPELINE AND PROCESSING, LLC,

                             COLLECTIVELY AS BUYER,

                                   DATED AS OF

                                 MARCH 12, 2007

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

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
ARTICLE I DEFINITIONS....................................................     1
   Section 1.1  Specific Definitions.....................................     1

ARTICLE II SALE AND PURCHASE.............................................     8
   Section 2.1  Agreement to Sell and Purchase...........................     8
   Section 2.2  Time and Place of Closing................................     8
   Section 2.3  Effective Date...........................................     9

ARTICLE III REPRESENTATIONS AND WARRANTIES OF SELLER.....................    10
   Section 3.1  Corporate Organization; Qualification....................    10
   Section 3.2  Authority Relative to this Agreement.....................    10
   Section 3.3  Equity Interests.........................................    11
   Section 3.4  Consents and Approvals...................................    12
   Section 3.5  No Conflict or Violation.................................    12
   Section 3.6  Financial Information....................................    12
   Section 3.7  Contracts................................................    13
   Section 3.8  Compliance with Law......................................    13
   Section 3.9  Permits..................................................    13
   Section 3.10 Litigation...............................................    14
   Section 3.11 Employee Matters.........................................    14
   Section 3.12 Labor Relations..........................................    15
   Section 3.13 Intellectual Property....................................    15
   Section 3.14 Representations with Respect to Environmental Matters....    16
   Section 3.15 Tax Matters..............................................    16
   Section 3.16 Insurance................................................    17
   Section 3.17 Absence of Certain Changes or Events.....................    17
   Section 3.18 Absence of Undisclosed Liabilities.......................    18
   Section 3.19 Property.................................................    19
   Section 3.20 Brokerage and Finders' Fees..............................    19
   Section 3.21 Corporate and Accounting Records.........................    19
   Section 3.22 Affiliated Transactions..................................    19
   Section 3.23 No Other Representations or Warranties...................    19
</TABLE>

                                       -i-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
ARTICLE IV REPRESENTATIONS AND WARRANTIES OF THE BUYER...................    20
   Section 4.1  Corporate Organization; Qualification....................    20
   Section 4.2  Authority Relative to this Agreement.....................    20
   Section 4.3  Consents and Approvals...................................    21
   Section 4.4  No Conflict or Violation.................................    21
   Section 4.5  Litigation...............................................    21
   Section 4.6  Brokerage and Finders' Fees..............................    22
   Section 4.7  Investment Representations...............................    22
   Section 4.8  No Other Representations or Warranties...................    22

ARTICLE V COVENANTS OF THE PARTIES.......................................    22
   Section 5.1  Consents and Approvals...................................    22
   Section 5.2  Further Assurances.......................................    24
   Section 5.3  Employee Matters.........................................    24
   Section 5.4  Tax Covenants............................................    25
   Section 5.5  Maintenance of Insurance Policies........................    30
   Section 5.6  Transfers of Title and Possession of Assets of
                Entities.................................................    31
   Section 5.7  Preservation of Records..................................    31
   Section 5.8  Public Statements........................................    32
   Section 5.9  Use of Corporate Name; Transitional Use of Seller's
                Name.....................................................    32
   Section 5.10 Release of Guarantees....................................    32
   Section 5.11 Confidentiality..........................................    33

ARTICLE VI SURVIVAL; INDEMNIFICATION.....................................    33
   Section 6.1  Survival.................................................    33
   Section 6.2  Indemnification..........................................    34
   Section 6.3  Calculation of Damages...................................    36
   Section 6.4  Procedures for Third-Party Claims........................    36
   Section 6.5  Procedures for Inter-Party Claims........................    37
   Section 6.6  Special Indemnification Provision Relating to
                Environmental Matters....................................    38
</TABLE>

                                      -ii-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
ARTICLE VII MISCELLANEOUS PROVISIONS.....................................    39
   Section 7.1  Interpretation...........................................    39
   Section 7.2  Disclosure Letters.......................................    40
   Section 7.3  Payments.................................................    40
   Section 7.4  Expenses.................................................    40
   Section 7.5  Choice of Law............................................    40
   Section 7.6  Assignment...............................................    40
   Section 7.7  Notices..................................................    40
   Section 7.8  Resolution of Disputes...................................    42
   Section 7.9  No Right of Setoff.......................................    43
   Section 7.10 Time is of the Essence...................................    43
   Section 7.11 Specific Performance.....................................    43
   Section 7.12 Entire Agreement.........................................    43
   Section 7.13 Binding Nature; Third Party Beneficiaries................    43
   Section 7.14 Counterparts.............................................    44
   Section 7.15 Severability.............................................    44
   Section 7.16 Headings.................................................    44
   Section 7.17 Waiver...................................................    44
   Section 7.18 Amendment................................................    44
</TABLE>

EXHIBITS

A    TRANSITION SERVICES AGREEMENT

                                      -iii-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
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                                                                            ----
<S>                                                                         <C>
INDEX OF DEFINED TERMS

Action..................................................................      1
Affected Employees......................................................      2
Affiliate...............................................................      2
Agreement...............................................................      2
Applicable Law..........................................................      2
Argentine Businesses....................................................      1
Business Day............................................................      2
Buyer...................................................................      1
Buyer Disclosure Letter.................................................      2
Buyer Indemnified Parties...............................................     33
Buyer Plans.............................................................     24
Cap Amount..............................................................     34
Casualty Insurance Claims...............................................     29
Claims..................................................................      2
Code....................................................................      2
Common Agreement........................................................      1
Confidentiality Agreement...............................................      2
Consolidated Income Tax Return..........................................     27
Cut-off Date............................................................     29
Damages.................................................................      2
Dispute.................................................................     41
Distribution............................................................      3
Entities................................................................      1
Environmental Laws......................................................      3
Environmental Permit....................................................      3
Equity Interests........................................................      1
ERISA...................................................................      3
Exchange Act............................................................      3
Financial Statements....................................................     12
GAAP....................................................................      3
Governmental Authority..................................................      3
Guarantees..............................................................     32
Hazardous Substances....................................................      3
Indebtedness............................................................      4
Indemnified Party.......................................................     34
Indemnifying Party......................................................     34
Indemnity Period........................................................     33
Insurance Policies......................................................     30
Intellectual Property...................................................      4
Knowledge of Seller.....................................................      4
Knowledge of such Person................................................      4
Liabilities.............................................................      4
</TABLE>

                                      -iv-

<PAGE>

                                TABLE OF CONTENTS
                                   (CONTINUED)

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
Liens...................................................................      4
Lucid...................................................................      1
Material Adverse Effect.................................................      5
Material Contract.......................................................     13
Michigan Businesses.....................................................      1
Michigan Courts.........................................................     42
Minimum Claim Amount....................................................     34
PBOPs...................................................................     24
Pension Plans...........................................................      6
Permits.................................................................     13
Permitted Liens.........................................................      6
Person..................................................................      6
Plans...................................................................     14
Policies................................................................     16
Post-Cut-off Taxes......................................................     26
Pre-Cut-off Taxes.......................................................     26
Released Parties........................................................     32
Representatives.........................................................      6
Rules...................................................................     42
Seller..................................................................      1
Seller Disclosure Letter................................................      7
Seller Indemnified Parties..............................................     34
Seller Plans............................................................     24
Seller Returns..........................................................     25
Straddle Period.........................................................     25
Straddle Period Returns.................................................     25
Straddle Statement......................................................     25
Subsidiary..............................................................      7
Tax Claim...............................................................     28
Tax Indemnified Party...................................................     28
Tax Indemnifying Party..................................................     28
Tax Return..............................................................      7
Taxes...................................................................      7
Third-Party Claim.......................................................     36
Threshold Amount........................................................     34
Transfer Taxes..........................................................     29
Transition Services Agreement...........................................      7
Treasury Regulation.....................................................      7
</TABLE>

                                       -v-

<PAGE>

                         AGREEMENT OF PURCHASE AND SALE

     This AGREEMENT OF PURCHASE AND SALE, dated as of March 12, 2007, is made
and entered into by and between CMS Enterprises Company, a Michigan corporation,
and CMS Energy Investment LLC, a Delaware limited liability company
(collectively the "Seller"), and Lucid Energy, L.L.C., a Michigan limited
liability company ("Lucid"), and Michigan Pipeline and Processing, LLC, a
Michigan limited liability company (collectively the "Buyer").

                                   WITNESSETH:

     WHEREAS, Seller and Lucid have entered into that certain Common Agreement
dated as of the date hereof (the "Common Agreement"), pursuant to which Seller,
directly or through Affiliates of Seller, agreed to sell, and Lucid, directly or
through Affiliates of Lucid, agreed to acquire, upon the terms and conditions
set forth in this Agreement, certain Michigan-based natural gas transmission,
gathering and processing businesses (the "Michigan Businesses"), and upon the
terms and conditions entered into contemporaneously herewith, Argentina-based
natural gas transmission and marketing and independent power production
businesses (the "Argentine Businesses");

     WHEREAS, Seller and Buyer intend that the transactions contemplated by this
Agreement relating to the sale of the Michigan Businesses will be consummated if
and only if the sale of the Argentine Businesses is consummated;

     WHEREAS, the Michigan Businesses are conducted through various domestic
legal entities (the "Entities" as described on Annex I), the equity
participations in which are owned, directly or indirectly and in relevant
amounts, by Seller ("Equity Interests" as described on Annex I);

     WHEREAS, Buyer desires to purchase, and Seller desires to sell to Buyer,
the Equity Interests, upon the terms and subject to the conditions set forth
herein;

     NOW, THEREFORE, in consideration of the foregoing, the representations,
warranties, covenants and agreements set forth in this Agreement, and other good
and valuable consideration, the adequacy and receipt of which are hereby
acknowledged, the parties hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

          Section 1.1 Specific Definitions. For purposes of this Agreement, the
     following terms shall have the meanings set forth below:

<TABLE>
<S>                              <C>
"Action"                         shall mean any administrative, regulatory,
                                 judicial or other formal proceeding, action,
                                 Claim, suit, investigation or inquiry
</TABLE>

<PAGE>

<TABLE>
<S>                              <C>
                                 by or before any Governmental Authority,
                                 arbitrator or mediator, at law or at equity.

"Affected Employees"             shall mean the Employees listed on Section
                                 1.1(a) of the Seller Disclosure Letter.

"Affiliate"                      shall have the meaning set forth in Rule 12b-2
                                 of the General Rules and Regulations under the
                                 Exchange Act.

"Agreement"                      shall mean this Agreement of Purchase and Sale,
                                 together with the Seller Disclosure Letter,
                                 Buyer Disclosure Letter, Annex I and Exhibits
                                 hereto, as the same may be amended or
                                 supplemented from time to time in accordance
                                 with the provisions hereof.

"Applicable Law"                 shall mean any statute, treaty, code, law,
                                 ordinance, executive order, rule or regulation
                                 (including a regulation that has been formally
                                 promulgated in a rule-making proceeding but,
                                 pending final adoption, is in proposed or
                                 temporary form having the force of law);
                                 guideline or notice having the force of law; or
                                 approval, permit, license, franchise, judgment,
                                 order, decree, injunction or writ of any
                                 Governmental Authority applicable to a
                                 specified Person or specified property, as in
                                 effect from time to time.

"Business Day"                   shall mean any day that is not a Saturday,
                                 Sunday or other day on which banks are required
                                 or authorized by law to be closed in the City
                                 of New York.

"Buyer Disclosure Letter"        shall mean the Buyer Disclosure Letter
                                 delivered to Seller concurrently with this
                                 Agreement, which is an integral part of this
                                 Agreement.

"Claims"                         shall mean any and all claims, lawsuits,
                                 demands, causes of action, investigations and
                                 other proceedings (whether or not before a
                                 Governmental Authority).

"Code"                           shall mean the Internal Revenue Code of 1986,
                                 as amended.

"Confidentiality Agreement"      shall mean the confidentiality agreement
                                 entered into by and between the EE Group (an
                                 Affiliate of Buyer) and CMS Enterprises Company
                                 dated October 23, 2006.

"Damages"                        shall mean judgments, settlements, fines,
                                 penalties, damages, Liabilities, losses or
                                 deficiencies, costs and expenses, including
                                 reasonable attorney's fees, court costs,
                                 expenses of arbitration or mediation, and other
                                 out-of-pocket expenses
</TABLE>

                                        2

<PAGE>

<TABLE>
<S>                              <C>
                                 incurred in investigating or preparing the
                                 foregoing; provided, however, that "Damages"
                                 shall not include incidental, indirect or
                                 consequential damages, damages for lost profits
                                 or other special, punitive or exemplary
                                 damages.

"Distribution"                   shall mean:

                                 (i) any dividend, distribution, repayment or
                                 repurchase of share capital, capital
                                 contribution or other return of capital to such
                                 Person's shareholders or equivalent holders of
                                 its ownership interests;

                                 (ii) any repayment of any loan owed to an
                                 Affiliate of such Person;

                                 (iii) any loan made to an Affiliate of such
                                 Person, in each case, other than to any of the
                                 Entities.

"Environmental Laws"             shall mean all foreign, federal, state and
                                 local laws, regulations, rules and ordinances
                                 in effect and existence as of the closing Date
                                 where the Michigan Businesses currently operate
                                 relating to pollution or protection of human
                                 health or the environment, natural resources or
                                 safety and health, including laws relating to
                                 releases or threatened releases of Hazardous
                                 Substances into the environment (including
                                 ambient air, surface water, groundwater, land,
                                 surface and subsurface strata).

"Environmental Permit"           shall mean any Permit, formal exemption,
                                 identification number or other authorization
                                 issued by a Governmental Authority pursuant to
                                 an applicable Environmental Law.

"ERISA"                          shall mean the Employee Retirement Income
                                 Security Act of 1974, as amended, and the
                                 regulations promulgated thereunder.

"Exchange Act"                   shall mean the Securities Exchange Act of 1934,
                                 as amended.

"GAAP"                           shall mean United States generally accepted
                                 accounting principles as in effect from time to
                                 time

"Governmental Authority"         shall mean any executive, legislative,
                                 judicial, tribal, regulatory, taxing or
                                 administrative agency, body, commission,
                                 department, board, court, tribunal, arbitrating
                                 body or authority of the United States or any
                                 foreign country, or any state, local or other
                                 governmental subdivision thereof.

"Hazardous Substances"           shall mean any chemicals, materials or
                                 substances defined as
</TABLE>

                                        3

<PAGE>

<TABLE>
<S>                              <C>
                                 or included in the definition of "hazardous
                                 substances", "hazardous wastes", "hazardous
                                 materials", "hazardous constituents",
                                 "restricted hazardous materials", "extremely
                                 hazardous substances", "toxic substances",
                                 "contaminants", "pollutants", "toxic
                                 pollutants", or words of similar meaning and
                                 regulatory effect under any applicable
                                 Environmental Law.

"Indebtedness"                   of any Person shall mean (i) all liabilities
                                 and obligations of such Person for borrowed
                                 money or evidenced by notes, bonds or similar
                                 instruments, (ii) obligations in respect of the
                                 deferred purchase price of property or services
                                 (other than any amount that would constitute
                                 current assets) to the extent that such amount
                                 would be accrued as a liability on a balance
                                 sheet prepared in accordance with GAAP, (iii)
                                 obligations in respect of capitalized leases,
                                 (iv) obligations in respect of letters of
                                 credit, acceptances or similar obligations, (v)
                                 obligations under interest rate cap agreements,
                                 interest rate swap agreements, foreign currency
                                 exchange contracts or other hedging contracts,
                                 and (vi) any guarantee of the obligations of
                                 another Person with respect to any of the
                                 foregoing.

"Intellectual Property"          shall mean all U.S. and foreign (a) patents and
                                 patent applications, (b) trademarks, service
                                 marks, logos, slogans, and trade dress, (c)
                                 copyrights, (d) software (excluding commercial
                                 off-the-shelf software), and (e) all
                                 confidential and proprietary information and
                                 know-how.

"Knowledge of Seller"            shall mean the knowledge, after due inquiry, of
                                 those Persons set forth in Section 1.1(b) of
                                 the Seller Disclosure Letter.

"Knowledge of such Person"       shall mean, and with respect to Lucid, the
                                 knowledge, after due inquiry, of those Persons
                                 set forth in Section 1.1(b) of the Buyer
                                 Disclosure Letter, and with respect to Michigan
                                 Pipeline and Processing, LLC, the knowledge,
                                 after due inquiry, of those Persons set forth
                                 in Section 1.1(c) of the Buyer Disclosure
                                 Letter.

"Liabilities"                    shall mean any and all debts, liabilities,
                                 commitments and obligations, whether or not
                                 fixed, contingent or absolute, matured or
                                 unmatured, liquidated or unliquidated, accrued
                                 or unaccrued, known or unknown, whether or not
                                 required by GAAP to be reflected in financial
                                 statements or disclosed in the notes thereto.

"Liens"                          shall mean any mortgage, pledge, lien
                                 (statutory or otherwise
</TABLE>

                                        4

<PAGE>

<TABLE>
<S>                              <C>
                                 and including, without limitation,
                                 environmental, ERISA and tax liens), security
                                 interest, easement, right of way, limitation,
                                 encroachment, covenant, claim, restriction,
                                 right, option, conditional sale or other title
                                 retention agreement, charge or encumbrance of
                                 any kind or nature (except for any restrictions
                                 arising under any applicable securities laws).

"Material Adverse Effect"        shall mean actions, circumstances or omissions
                                 that have an effect, individually or in the
                                 aggregate, that is materially adverse to (a)
                                 the business, operations, financial condition
                                 or assets of the Entities, taken as a whole, or
                                 (b) the ability of Seller to consummate the
                                 transactions contemplated hereby, in each case,
                                 other than any effect resulting from, relating
                                 to or arising out of: (i) the negotiation,
                                 execution, announcement of this Agreement and
                                 the transactions contemplated hereby, including
                                 the impact thereof on relationships,
                                 contractual or otherwise, with customers,
                                 suppliers, distributors, partners, joint owners
                                 or venturers and employees, (ii) any action
                                 taken by Seller, the Entities, Buyer or any of
                                 their respective Representatives or Affiliates
                                 required or permitted to be taken by the terms
                                 of this Agreement or necessary to consummate
                                 the transactions contemplated by this
                                 Agreement, (iii) the general state of the
                                 industries in which the Entities operate
                                 (including (A) pricing levels, (B) changes in
                                 national, regional or local wholesale or retail
                                 markets for natural gas or electricity, (C)
                                 changes in the national, regional or local
                                 interstate natural gas pipeline systems, (D)
                                 rules, regulations or decisions of Governmental
                                 Authorities or the courts affecting the gas
                                 transmission, gathering or processing
                                 industries as a whole, or rate orders, motions,
                                 complaints or other actions affecting the
                                 Entities and (E) any condition described in the
                                 Seller Disclosure Letter), (iv) general legal,
                                 regulatory, political, business, economic,
                                 capital market and financial market conditions
                                 (including prevailing interest rate levels), or
                                 conditions otherwise generally affecting the
                                 industries in which the Entities operate, (v)
                                 any change in law, rule or regulation or GAAP
                                 or interpretations thereof applicable to the
                                 Entities, Seller or Buyer, (vi) acts of God,
                                 national or international political or social
                                 conditions or (vii) general economic conditions
                                 in Michigan; provided, that, for purposes of
                                 determining a "Material Adverse Effect", any
                                 effect on the business, financial conditions or
                                 assets of the business of any Person shall
                                 include only the portion of such effect
                                 attributable to the ownership interest of the
                                 Entities and their Affiliates and shall exclude
                                 any portion of such effect attributable to the
                                 ownership interest of any third party in such
                                 Person.
</TABLE>

                                        5

<PAGE>

<TABLE>
<S>                              <C>
"Pension Plans"                  shall mean all Plans providing pensions,
                                 superannuation benefits or retirement savings,
                                 including pension plans, top up pensions or
                                 supplemental pensions.

"Permitted Liens"                shall mean (a) zoning, planning and building
                                 codes and other applicable laws regulating the
                                 use, development and occupancy of real property
                                 and permits, consents and rules under such
                                 laws; (b) encumbrances, easements,
                                 rights-of-way, covenants, conditions,
                                 restrictions and other matters affecting title
                                 to real property which do not materially
                                 detract from the value of such real property or
                                 materially restrict the use of such real
                                 property; (c) leases and subleases of real
                                 property; (d) all easements, encumbrances or
                                 other matters which are necessary for utilities
                                 and other similar services on real property;
                                 (e) Liens to secure indebtedness reflected on
                                 the Financial Statements or indebtedness
                                 incurred in the ordinary course of business,
                                 consistent with past practice, after the date
                                 thereof, (f) Liens for Taxes and other
                                 governmental levies not yet due and payable or,
                                 if due, (i) not delinquent or (ii) being
                                 contested in good faith by appropriate
                                 proceedings during which collection or
                                 enforcement against the property is stayed and
                                 with respect to which adequate reserves have
                                 been established and are being maintained to
                                 the extent required by GAAP, (g) mechanics',
                                 workmen's, repairmen's, materialmen's,
                                 warehousemen's, carriers' or other Liens,
                                 including all statutory Liens, arising or
                                 incurred in the ordinary course of business,
                                 (h) original purchase price conditional sales
                                 contracts and equipment leases with third
                                 parties entered into in the ordinary course of
                                 business, (i) Liens that do not materially
                                 interfere with or materially affect the value
                                 or use of the respective underlying asset to
                                 which such Liens relate, (j) Liens which are
                                 capable of being cured through condemnation
                                 procedures under the Natural Gas Act, and (k)
                                 Liens which are reflected in any Material
                                 Contract.

"Person"                         shall mean any natural person, corporation,
                                 company, general partnership, limited
                                 partnership, limited liability partnership,
                                 joint venture, proprietorship, limited
                                 liability company, or other entity or business
                                 organization or vehicle, trust, unincorporated
                                 organization or Governmental Authority or any
                                 department or agency thereof.

"Representatives"                Shall mean accountants, counsel or
                                 representatives.
</TABLE>

                                        6

<PAGE>

<TABLE>
<S>                              <C>
"Seller Disclosure Letter"       shall mean the Seller Disclosure Letter
                                 delivered to Buyer concurrently with this
                                 Agreement, which is an integral part of this
                                 Agreement.

"Subsidiary"                     of any Entity means, at any date, any Person
                                 (a) the accounts of which would be consolidated
                                 with and into those of the applicable Person in
                                 such Person's consolidated financial statements
                                 if such financial statements were prepared in
                                 accordance with GAAP as of such date or (b) of
                                 which securities or other ownership interests
                                 representing more than fifty percent (50%) of
                                 the equity or more than fifty percent (50%) of
                                 the ordinary voting power or, in the case of a
                                 partnership, more than fifty percent (50%) of
                                 the general partnership interests or more than
                                 fifty percent (50%) of the profits or losses of
                                 which are, as of such date, owned, controlled
                                 or held by the applicable Person or one or more
                                 subsidiaries of such Person.

"Tax Return"                     shall mean any report, return, declaration, or
                                 other information required to be supplied to a
                                 Governmental Authority in connection with Taxes
                                 including any claim for refund or amended
                                 return.

"Taxes"                          shall mean all taxes, levies or other like
                                 assessments, including income, gross receipts,
                                 excise, value added, real or personal property,
                                 withholding, asset, sales, use, license,
                                 payroll, transaction, capital, business,
                                 corporation, employment, net worth and
                                 franchise taxes, or other governmental taxes
                                 imposed by or payable to any foreign, Federal,
                                 state or local taxing authority, whether
                                 computed on a separate, consolidated, unitary,
                                 combined or any other basis; and in each
                                 instance such term shall include any interest,
                                 penalties or additions to tax attributable to
                                 any such Tax.

"Transition Services             shall mean the transition services agreement to
Agreement"                       be entered into on the date hereof between
                                 Seller and Buyer, substantially in the form of
                                 the agreement attached hereto as Exhibit A.

"Treasury Regulation"            shall mean the income Tax regulations,
                                 including temporary and proposed regulations,
                                 promulgated under the Code, as amended.
</TABLE>

                                        7
<PAGE>

                                   ARTICLE II

                                SALE AND PURCHASE

          Section 2.1 Agreement to Sell and Purchase.

               (a) Simultaneously with the payment of the Purchase Price in
     accordance with Section 2.1(b) of this Agreement, Buyer shall purchase,
     acquire and accept from Seller, and Seller shall sell, convey, assign,
     transfer and deliver to Buyer, all of Seller's interests in the Equity
     Interests, free and clear of all Liens, as well as certain rights and
     interests in related tangible and intangible property being granted in
     support of the consummation of the transactions contemplated hereby.

               (b) As of the date hereof, Buyer shall pay to Seller, in
     consideration for the purchase of the Equity Interests and such related
     rights and interests pursuant to Section 2.1(a), an amount in cash equal to
     $55,000,000 (the "Purchase Price") by wire transfer of same day funds to an
     account or accounts and in such amounts as designated by Seller.

          Section 2.2 Time and Place of Closing.

               (a) Upon payment of the Purchase Price, Seller shall deliver or
     cause to be delivered, in form and substance satisfactory to Buyer (unless
     previously delivered), the following items:

               (i) a certificate or certificates representing the Equity
     Interests (or other appropriate instruments evidencing transfer of
     ownership), accompanied by stock or similar powers duly endorsed in blank
     by Seller or accompanied by instruments of transfer duly executed by
     Seller;

               (ii) a certificate of incumbency and authority of Seller dated
     the date hereof;

               (iii) a duly executed counterpart of the Transition Services
     Agreement;

               (iv) written resignations, effective as of the date hereof, from
     each of the officers and directors of the Entities;

               (v) title to all assets attributed to the Entities and their
     businesses that are not in their possession or titled in their name and
     would not otherwise be transferred by transfer of the certificates
     representing the Equity Interests;

               (vi) an estimated payment of $2,200,000, which payment shall be
     made by wire transfer of same day funds to an account or accounts and in
     such amounts as designated by Buyer in writing. The estimated payment will
     be reconciled in accordance with the provisions of Section 2.3.; and

                                       8

<PAGE>

               (vii) evidence of termination of the Intercompany Cash Pooling
     Arrangement between CMS Energy Investment LLC and/or CMS Capital LLC and
     the Entities (other than Jackson Pipeline Company LLC, which is not a party
     to such arrangement).

               (b) As of the date hereof, Buyer shall deliver or cause to be
     delivered to Seller (unless previously delivered), the following items:

               (i) the Purchase Price by wire transfer of same day funds to an
     account or accounts and in such amounts as designated by Seller in writing;

               (ii) a certificate of incumbency and authority of Buyer dated the
     date hereof; and

               (iii) a duly executed counterpart of the Transition Services
     Agreement.

          Section 2.3 Effective Date.

          The Effective Date of the transaction for financial purposes shall be
     December 31, 2006, so that Buyer will receive the assets and liabilities
     shown on the December 31, 2006 Financial Statements plus all of the results
     of operations (including net cash flow) in the ordinary course of business
     consistent with past practices of each of the Entities after December 31,
     2006. To avoid confusion, Buyer and Seller agree that:

               (a) Buyer shall receive the assets and liabilities shown on the
     December 31, 2006 Financial Statements, less the following Intercompany
     Notes receivables:

               (i) $2,494,058 loan from CMS Antrim Gas LLC to CMS Energy
     Investment LLC

               (ii) $855,989 loan from CMS Litchfield LLC to CMS Energy
     Investment LLC

               (iii) $716,663 loan from CMS Grands Lacs LLC to CMS Energy
     Investment LLC

               (iv) $950,341 loan from CMS Bay Area Pipeline, LLC to CMS Energy
     Investment LLC

               (v) $566,887 loan from CMS Jackson LLC to CMS Energy Investment
     LLC.

               (b) Buyer shall also receive all the results of operations
     (including net cash flow) from January 1, 2007 through the date hereof.
     Buyer and Seller shall work in good faith to reconcile and settle all
     accounts as of the date hereof,

                                       9

<PAGE>

     consistent with the intent described above, within thirty (30) days after
     the date hereof. If it is determined that Seller owes money to Buyer, it
     shall pay Buyer within five (5) days of such determination. If it is
     determined that Buyer owes money to Seller, it shall pay Seller within five
     (5) days of such determination.

                                   ARTICLE III

                    REPRESENTATIONS AND WARRANTIES OF SELLER

          Seller hereby represents and warrants to Buyer as follows:

          Section 3.1 Corporate Organization; Qualification.

          Each Seller is duly organized and validly existing and in good
     standing under the Laws of its governing jurisdiction. Each of the Entities
     is duly organized and validly existing and in good standing under the Laws
     of its governing jurisdiction and each (a) has the requisite power to carry
     on its businesses as currently conducted and (b) is duly qualified to do
     business in each of the jurisdictions in which the ownership, operation or
     leasing of its properties or assets or the conduct of its business requires
     it to be so qualified, except where the failure to be so qualified would
     not have a Material Adverse Effect.

          Section 3.2 Authority Relative to this Agreement.

          Each Seller has full corporate power and authority to execute and
     deliver this Agreement, the Transition Services Agreement (as applicable)
     and the other agreements, documents and instruments to be executed and
     delivered by it in connection with this Agreement or the Transition
     Services Agreement, and to consummate the transactions contemplated hereby
     and thereby. The execution, delivery and performance of this Agreement, the
     Transition Services Agreement and the other agreements, documents and
     instruments to be executed and delivered in connection with this Agreement
     or the Transition Services Agreement and the consummation of the
     transactions contemplated hereby and thereby have been duly and validly
     authorized by all the necessary action on the part of each Seller (as
     applicable) and no other corporate or other proceedings on the part of
     Seller are necessary to authorize this Agreement, the Transition Services
     Agreement and the other agreements, documents and instruments to be
     executed and delivered in connection with this Agreement or the Transition
     Services Agreement or to consummate the transactions contemplated hereby
     and thereby. This Agreement, the Transition Services Agreement and the
     other agreements, documents and instruments to be executed and delivered in
     connection with this Agreement or the Transition Services Agreement have
     been, duly and validly executed and delivered by Seller and assuming that
     this Agreement, the Transition Services Agreement and the other agreements,
     documents and instruments to be executed and delivered in connection with
     this Agreement or the Transition Services Agreement constitute legal, valid
     and binding agreements of the Buyer, are enforceable against Seller in
     accordance with their respective terms, except that such enforceability may
     be limited by applicable

                                       10

<PAGE>

     bankruptcy, insolvency, moratorium or other similar laws affecting or
     relating to enforcement of creditors' rights generally or general
     principles of equity.

          Section 3.3 Equity Interests.

               (a) The Equity Interests are duly authorized, validly issued and
     fully paid and were not issued in violation of any preemptive rights.
     Except as set forth in Section 3.3(a) of the Seller Disclosure Letter, (i)
     there are no equity interests of the Entities authorized, issued or
     outstanding or reserved for any purpose and (ii) there are no (A) existing
     options, warrants, calls, preemptive rights, subscriptions or other rights,
     agreements, arrangements or commitments of any character, relating to the
     Entities, obligating Seller or any of its Affiliates to issue, transfer or
     sell, or cause to be issued, transferred or sold, any additional equity
     interest in the Entities, (B) outstanding securities of Seller or its
     Affiliates that are convertible into or exchangeable or exercisable for any
     equity interest in the Entities, (C) options, warrants or other rights to
     purchase from Seller or its Affiliates any such convertible or exchangeable
     securities or (D) other than this Agreement, contracts, agreements or
     arrangements of any kind relating to the issuance of any equity interest in
     the Entities, or any such options, warrants or rights, pursuant to which,
     in any of the foregoing cases, Seller or its Affiliates are subject or
     bound.

               (b) Except as set forth in Section 3.3(b) of the Seller
     Disclosure Letter, Seller owns all of the issued and outstanding Equity
     Interests and has good, valid and marketable title to the Equity Interests,
     free and clear of all Liens or other defects in title, and the Equity
     Interests have not been pledged or assigned to any Person. The Equity
     Interests owned by Seller are not subject to any restrictions on
     transferability other than those imposed by this Agreement and by
     applicable securities laws. Following the transfer of the Equity Interests
     to Buyer, Buyer will own all of the issued and outstanding Equity Interests
     owned by Seller and will have good and valid title to the Equity Interests,
     free and clear of all Liens.

               (c) Section 3.3(c) of the Seller Disclosure Letter sets forth, as
     of the date hereof, a list of each of the Entities, including its name, its
     jurisdiction of organization, its authorized and outstanding capital stock
     (or equivalent equity interest) and the percentage of its outstanding
     capital stock owned by the Seller and/or the Entities, as applicable.

               (d) Except as set forth in Section 3.3(d) of the Seller
     Disclosure Letter, there are no Persons (other than any of the Entities) in
     which any of the Entities owns any equity or other similar interest.

          Section 3.4 Consents and Approvals.

          Except as set forth in Section 3.4 of the Seller Disclosure Letter,
     Seller requires no consent, approval or authorization of, or filing,
     registration or qualification with, any Governmental Authority, or any
     other Person as a condition to the execution and delivery of this Agreement
     or the performance of the obligations hereunder, except where the

                                       11

<PAGE>

     failure to obtain such consent, approval or authorization of, or filing of,
     registration or qualification with, any Governmental Authority, or any
     other Person would not have a Material Adverse Effect.

          Section 3.5 No Conflict or Violation.

          Except as set forth in Section 3.5 of the Seller Disclosure Letter,
     the execution, delivery and performance by the Seller of this Agreement
     does not:

               (a) violate or conflict with any provision of the organizational
     documents or bylaws of Seller or any of the Entities;

               (b) violate any applicable provision of a law, statute, judgment,
     order, writ, injunction, decree, award, rule or regulation of any
     Governmental Authority, except where such violation would not have a
     Material Adverse Effect;

               (c) violate, result in a breach of, constitute (with due notice
     or lapse of time or both) a default, or cause any material obligation,
     penalty or premium to arise or accrue including without limitation the
     acceleration of maturity of any indebtedness or other obligation or
     imposition of any lien, charge or encumbrance on any assets of any of the
     Entities, under any Material Contract, lease, loan, mortgage, security
     agreement, trust indenture or other material agreement or instrument to
     which any of the Entities is a party or by which any of them is bound or to
     which any of their respective properties or assets is subject, except for
     violations, breaches or defaults that would not have a Material Adverse
     Effect;

               (d) result in the imposition or creation of any material Lien
     upon or with respect to any of the properties or assets owned or used by
     the Entities; or;

               (e) result in the cancellation, modification, revocation or
     suspension of any material Permits or in the failure to renew any material
     Permit.

          Section 3.6 Financial Information.

               (a) Prior to the date hereof, Seller has made available to Buyer
     or its Representatives certain unaudited financial information relating to
     each of the Entities as of December 31, 2004, 2005 and 2006 detailing
     assets, liabilities, income and cash flows (collectively, the "Financial
     Statements"). A copy of the unaudited financial statements as of December
     31, 2006 of the Entities is disclosed in Section 3.6(a) of the Seller
     Disclosure Letter.

               (b) The Financial Statements were prepared in accordance with
     GAAP, consistently applied throughout the periods indicated and fairly
     present, in all material respects, the combined financial position, results
     of operations and cash flows of each of the Entities, as of the dates
     thereof and for the periods covered thereby, in each case, except as
     disclosed in Section 3.6(b) of the Seller Disclosure Letter.

                                       12

<PAGE>

          Section 3.7 Contracts.

               (a) Section 3.7(a) of the Seller Disclosure Letter sets forth a
     list, as of the date hereof, of each material contract, lease or similar
     agreement or instrument to which any of the Entities is a party, other than
     (i) any purchase or sale orders arising in the ordinary course of business,
     (ii) any contract involving the payment or receipt of less than $100,000 in
     any one year, (iii) any contract terminable within 30 days or less by its
     terms, and (iv) any contract listed in any other Section of the Seller
     Disclosure Letter (each contract set forth in Section 3.7(a) of the Seller
     Disclosure Letter being referred to herein as a "Material Contract").

               (b) Section 3.7(b) of the Seller Disclosure Letter sets forth a
     list, as of the date hereof, of each Material Contract that any of the
     Entities has with Seller or with any Affiliate of Seller that is not one of
     the Entities.

               (c) Except as set forth in Section 3.7(c) of the Seller
     Disclosure Letter, each Material Contract is a valid and binding agreement
     of the Entities party thereto and, to the Knowledge of Seller, is in full
     force and effect.

               (d) Except as set forth in Section 3.7(d) of the Seller
     Disclosure Letter, there is no default by Seller or any of the Entities
     under any Material Contract to which it is a party, and Seller has no
     Knowledge of any default by any counterparties under any Material Contract,
     in each case other than defaults which have been cured or waived and which
     would not have a Material Adverse Effect.

          Section 3.8 Compliance with Law.

          Except for Environmental Laws and Tax laws, which are the subject of
     Section 3.14 and Section 3.15, respectively, and except as set forth in
     Section 3.8 of the Seller Disclosure Letter, the Entities are in compliance
     with all federal, state, local or foreign laws, statutes, ordinances,
     rules, regulations, judgments, orders, writs, injunctions or decrees of any
     Governmental Authority applicable to their respective properties, assets
     and businesses except where such noncompliance would, individually or in
     the aggregate, not have a Material Adverse Effect.

          Section 3.9 Permits.

               (a) Except as set forth in Section 3.9(a) of the Seller
     Disclosure Letter, Seller, and the Entities have all permits, licenses,
     certificates of authority, orders and approvals of, and have made all
     filings applications and registrations with Governmental Authorities
     necessary for the conduct of their respective business operations as
     presently conducted (collectively, the "Permits"), except for those Permits
     the absence of which would not have a Material Adverse Effect.

               (b) Except as set forth in Section 3.9(b) of the Seller
     Disclosure, all Permits are issued to, and in the name of, the Entities
     which require such Permit.

                                       13

<PAGE>

               (c) Except as set forth in Section 3.9(c) of the Seller
     Disclosure Letter, the Permits are in full force and effect, no violations
     thereof have been recorded and no proceedings are pending or, to the
     Knowledge of Seller, threatened for the revocation or partial revocation
     thereof, in each case other than such failures, violations or proceedings
     that have been cured or waived and those which would not have a Material
     Adverse Effect. Seller and Buyer shall use their reasonable best efforts to
     cooperate with respect to the use and transfer of any Permits and licenses
     that cannot be readily transferred.

          Section 3.10 Litigation.

          Except as identified in Section 3.10 of the Seller Disclosure Letter,
     there are no Actions before any Governmental Authority or arbitration panel
     or tribunal pending or in progress or, to the Knowledge of Seller,
     threatened, against Seller, the Entities, or any of their respective
     Affiliates or any executive officer or director thereof relating to the
     Equity Interests or the respective assets or businesses of the Entities,
     except as would not, individually or in the aggregate, have a Material
     Adverse Effect. None of Seller, the Entities, or any of their respective
     Affiliates are subject to any outstanding judgment, order, writ,
     injunction, decree or award entered in an Action to which such Person was a
     named party relating to the Equity Interests or the respective assets or
     businesses of such Persons, except as would not, individually or in the
     aggregate, have a Material Adverse Effect.

          Section 3.11 Employee Matters.

               (a) All material benefit and compensation plans and contracts,
     including, but not limited to, "employee benefit plans" within the meaning
     of Section 3(3) of ERISA, and deferred compensation, stock option, stock
     purchase, stock appreciation rights, stock-based incentive bonus,
     severance, employment, change in control, vacation or fringe benefit
     programs, policies, agreements, arrangements or plans maintained by the
     Entities or by the Seller or their Affiliates for the benefit of any of
     their current employees of the Entities (collectively, the "Plans") have
     been or are being terminated and, if applicable, vested as of the date
     hereof, in each case as determined by Seller and its Affiliates in its sole
     discretion and subject to the provisions of such Plans and applicable Law.

               (b) All Affected Employees are subject to "at will" employment
     arrangements under applicable policies of Seller and the Entities as of the
     date hereof.

          Section 3.12 Labor Relations.

          Except as set forth in Section 3.12 of the Seller Disclosure Letter,
     (i) none of the Entities is a party to any labor or collective bargaining
     agreements, and there are no labor or collective bargaining agreements
     which pertain to any employees of the Entities, (ii) within the preceding
     eighteen (18) months, there have been no representation or certification
     proceedings, or petitions seeking a representation proceeding, pending or,
     to

                                       14

<PAGE>

     the Knowledge of Seller, threatened in writing to be brought or filed with
     the National Labor Relations Board or any other labor relations tribunal or
     authority with respect to the Entities, (iii) within the preceding twelve
     (12) months, to the Knowledge of Seller, there have been no organizing
     activities involving the Entities with respect to any group of their
     respective employees, (iv) there are no pending or, to the Knowledge of
     Seller, threatened strikes, work stoppages, slowdowns or lockouts against
     the Entities, or their respective Employees or involving any of the
     Entities' facilities; and (v) there are no pending unfair employment
     practice charges, grievances or complaints filed or, to the Knowledge of
     Seller, threatened to be filed with any Governmental Authority based on the
     employment or termination of employment by the Entities of any employee

          Section 3.13 Intellectual Property.

               (a) Section 3.13(a) of the Seller Disclosure Letter sets forth a
     list of all material U.S. and foreign: (i) patents and patent applications;
     (ii) trademark registrations and applications; and (iii) copyright
     registrations and applications, owned by the Entities. The foregoing
     schedules set forth at Section 3.13(a) of the Seller Disclosure Letter are
     complete and accurate in all material respects. To the Knowledge of Seller,
     the foregoing registrations are in effect and subsisting. Except as set
     forth in Section 3.13(a) of the Seller Disclosure Letter, the Entities have
     all licenses necessary to use the equipment and processes as currently
     being used by them in the ordinary conduct of their respective businesses
     and operations and, to the Knowledge of Seller, no further licenses are
     required to so conduct their businesses and operations.

               (b) Except as would not, individually or in the aggregate, have a
     Material Adverse Effect, or as set forth in Section 3.13(b) of the Seller
     Disclosure Letter, (i) to the Knowledge of Seller, the conduct of the
     respective businesses of the Entities does not infringe or otherwise
     violate any Person's Intellectual Property, and there is no such claim
     pending or to the Seller's Knowledge threatened against the Entities, and
     (ii) to the Knowledge of Seller, no Person is infringing or otherwise
     violating any Intellectual Property owned by the Entities, and no such
     claims are pending or threatened against any Person by the Entities.

               (c) Except as set forth in Section 3.13(c) of the Seller
     Disclosure, all owned or licensed Intellectual Property is owned by or
     licensed to the Entities which utilize such Intellectual Property.

          Section 3.14 Representations with Respect to Environmental Matters.

          To the Knowledge of Seller, and except as set forth in Section 3.14 of
     the Seller Disclosure Letter or as would not, individually or in the
     aggregate, have Material Adverse Effect:

               (a) The Entities are in compliance with all applicable
     Environmental Laws;

                                       15

<PAGE>

               (b) The Entities have all of the Environmental Permits required
     in order to conduct their operations or, where such Environmental Permits
     have expired, have applied for a renewal of such Environmental Permits in a
     timely fashion;

               (c) There is no pending or threatened written Claim, lawsuit, or
     administrative proceeding against the Entities under or pursuant to any
     Environmental Law;

               (d) None of the Entities is a party or subject to any
     administrative or judicial order, decree or other agreement with a
     Governmental Authority under or pursuant to any applicable Environmental
     Law;

               (e) None of the Entities has received written notice from any
     third party, including any Governmental Authority, alleging that any of the
     Entities has been or is in violation or potentially in violation of any
     applicable Environmental Law or otherwise may be liable under any
     applicable Environmental Law; and

               (f) With respect to the real property that is currently owned,
     leased or under easement or right of way by the Entities, there have been
     no spills or discharges of Hazardous Substances on or underneath any such
     real property.

     The representations and warranties set forth in this Section 3.14 are
     Seller's sole and exclusive representations and warranties related to
     environmental matters.

          Section 3.15 Tax Matters.

          Except as would not have a Material Adverse Effect:

               (a) All federal, state, and local Tax Returns required to be
     filed by or on behalf of the Entities, and each consolidated, combined,
     unitary, affiliated or aggregate group of which any of the Entities are a
     member has been timely filed (taking into account applicable extensions)
     and in each case are correct and complete in so far as the Entities are
     concerned, and all Taxes shown as due on such Tax Returns have been paid,
     or adequate reserves therefor have been established.

               (b) There is no deficiency, proposed adjustment, or matter in
     controversy that has been asserted or assessed in writing with respect to
     any Taxes due and owing by the Entities that has not been paid or settled
     in full.

               (c) Each of the Entities is treated as a disregarded entity for
     federal tax purposes.

          Section 3.16 Insurance.

               (a) Section 3.16(a) of the Seller Disclosure Letter sets forth a
     true and complete list of all current policies of all material property and
     casualty insurance, insuring the properties, assets, employees and/or
     operations of the Entities (collectively, the "Policies"). To the Knowledge
     of Seller, all premiums payable under

                                       16

<PAGE>

     such Policies have been paid in a timely manner and the Entities, as
     applicable, have complied in all material respects with the terms and
     conditions of all such Policies.

               (b) As of the date hereof, Seller has not received any written
     notification of the failure of any of the Policies to be in full force and
     effect. To the Knowledge of Seller, none of the Entities is in default
     under any provision of the Policies, and except as set forth in Section
     3.16(b) of the Seller Disclosure Letter, there is no claim by the Entities
     or any other Person pending under any of the Policies as to which coverage
     has been denied or disputed by the underwriters or issuers thereof.

          Section 3.17 Absence of Certain Changes or Events.

               (a) Except as set forth in Section 3.17(a) of the Seller
     Disclosure Letter, each of the Entities conducts its respective businesses
     in the ordinary course of business, consistent with past practice in all
     material respects, since December 31, 2006.

               (b) Except as set forth in Section 3.17(b) of the Seller
     Disclosure Letter, or in the Financial Statements, and the notes thereto,
     there has not been with respect to each of the Entities any event or
     development or change which has resulted or would reasonably be likely to
     result in a Material Adverse Effect.

               (c) Section 3.17(c) of the Seller Disclosure Letter sets forth a
     true and complete list of the Distributions made by each of the Entities
     since December 31, 2006.

               (d) Except as set forth in Section 3.17(d) of the Seller
     Disclosure Letter, since December 31, 2006, each of the Entities has not:

               (i) granted any severance or termination pay to, or entered into,
     extended or amended any employment, consulting, severance or other
     compensation agreement with, or otherwise increased the compensation or
     benefits provided to any of its officers or other employees whose annual
     salary base is in excess of $100,000;

               (ii) sold, leased, licensed, mortgaged or otherwise disposed of
     any properties or assets material to its business having a fair market
     value in excess of $100,000 individually or $400,000 in the aggregate,
     other than (A) sales made in the ordinary course of business, consistent
     with past practice; or (B) sales of obsolete or other assets not presently
     utilized in its business;

               (iii) made any capital expenditure in excess of 10% of the annual
     budgeted capital expenditures;

               (iv) paid, repurchased, discharged or satisfied any of its
     material Claims, Liabilities or obligations (absolute, accrued, asserted or
     unasserted, contingent or otherwise), other than in the ordinary course of
     business, consistent with past practice;

                                       17

<PAGE>

               (v) (A) incurred or assumed or guaranteed any long-term debt, or
     except in the ordinary course of business or consistent with past practice,
     incurred or assumed or guaranteed short-term Indebtedness (other than
     intercompany Indebtedness) exceeding $100,000 in the aggregate; (B)
     modified the terms of any Indebtedness or other liability, other than
     modifications of short-term debt in the ordinary course of business,
     consistent with past practice; or (C) assumed, guaranteed, endorsed or
     otherwise became liable or responsible (whether directly, contingently or
     otherwise) for the material obligations of any other Person; or

               (vi) authorized any of, or committed or agreed to take any of,
     the actions referred to in the paragraphs (i) through (v) above.

               (e) Except as set forth in Section 3.17(e) of the Seller
     Disclosure Letter, since December 31, 2006, each of the Entities has not
     recognized any material Tax liability outside the ordinary course of
     business, made or changed any election for Tax purposes, changed any annual
     accounting period for Taxes, filed any material Tax Return or amended Tax
     Return, entered into any closing agreement for Tax purposes, settled any
     Tax claim or assessment relating to any of the Entities, surrendered any
     right to claim a refund of Taxes, consented to any extension or waiver of
     the limitation period applicable to any Tax claim or assessment relating to
     any of the Entities, or taken any other action relating to the filing of
     any Tax Return or the payment of any Tax, if such election, adoption,
     change, amendment, agreement, settlement, surrender, consent or other
     action would have the effect of increasing the Tax liability of any of the
     Entities for any period ending after December 31, 2006 or decreasing any
     Tax attribute of any of the Entities existing on that date.

          Section 3.18 Absence of Undisclosed Liabilities.

          None of the Entities has any Liabilities (whether absolute, accrued,
     contingent or otherwise) except those Liabilities (a) disclosed and
     reserved against in the Financial Statements (or notes thereto) as required
     by GAAP, (b) set forth in Section 3.18 of the Seller Disclosure Letter, (c)
     incurred in the ordinary course of business since December 31, 2006 for
     each of the Entities as described in Section 3.6 or (d) which would not
     result in a Material Adverse Effect.

          Section 3.19 Property.

          Except as set forth in Section 3.19 of the Seller Disclosure Letter,
     each of the Entities has valid title to, leases, or holds valid rights of
     way, easements or similar real property rights relating to, all assets used
     or held for use by each of the Entities, in each case free and clear of any
     Liens (other than Permitted Liens) except for such failures of which to so
     own, lease or hold would not, individually or in the aggregate, have a
     Material Adverse Effect.

          Section 3.20 Brokerage and Finders' Fees.

          None of Seller, the Entities, or any of their Affiliates or their
     respective stockholders, partners, directors, officers or employees, has
     incurred, or will incur any

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     brokerage, finders' or similar fee in connection with the transactions
     contemplated by this Agreement or the Transition Services Agreement.

          Section 3.21 Corporate and Accounting Records.

          The minute books of the Entities (excluding Jackson Pipeline Company)
     contain true, complete and accurate records of all meetings and accurately
     reflect all other corporate action of their respective members (including
     committees thereof). Each of the Entities (except Jackson Pipeline Company)
     maintains adequate records which accurately and validly reflect
     transactions conducted by each of the Entities in reasonable detail, and
     maintains accounting controls, policies and procedures sufficient to ensure
     that such transactions are (a) executed in accordance with its management's
     general or specific authorization and (b) recorded in a manner which
     permits the preparation of financial statements in accordance with
     Applicable Law and applicable regulatory accounting requirements.

          Section 3.22 Affiliated Transactions.

          Except as described in Section 3.22 of the Seller Disclosure Letter,
     and except for trade payables and receivables arising in the ordinary
     course of business consistent with past practices for purchases and sales
     of goods or services consistent with past practice, none of the Entities
     have been a party over the past twelve (12) months to any material
     transaction or agreement with Seller or any Affiliate of Seller (other than
     the Entities) and no director or officer of Seller or its Affiliates (other
     than the Entities), has, directly or indirectly, any material interest in
     any of the assets or properties of the Entities.

          Section 3.23 No Other Representations or Warranties.

          Except for the representations and warranties contained in this
     Article III, none of Seller, the Entities, or any other Person makes any
     other express or implied representation or warranty on behalf of Seller.

                                   ARTICLE IV

                   REPRESENTATIONS AND WARRANTIES OF THE BUYER

          Each Buyer hereby represents and warrants to Seller as follows:

          Section 4.1 Corporate Organization; Qualification.

          Such Person (a) is a limited liability company duly organized and
     validly existing under the Laws of its jurisdiction of formation, (b) has
     the requisite power to carry on its businesses as currently conducted and
     (c) is duly qualified to do business in each of the jurisdictions in which
     the ownership, operation or leasing of its properties or assets or the
     conduct of its business requires it to be so qualified, except where the
     failure to be so qualified would not materially and adversely affect the
     ability of, or timing for, Buyer to consummate the transactions
     contemplated by this Agreement or the Transition Services Agreement.

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<PAGE>

          Section 4.2 Authority Relative to this Agreement.

          Such Person has full corporate or similar power and authority to
     execute and deliver this Agreement, the Transition Services Agreement and
     the other agreements, documents and instruments to be executed and
     delivered by it in connection with this Agreement or the Transition
     Services Agreement, and to consummate the transactions contemplated hereby
     and thereby. The execution, delivery and performance of this Agreement, the
     Transition Services Agreement and the other agreements, documents and
     instruments to be executed and delivered in connection with this Agreement
     or the Transition Services Agreement and the consummation of the
     transactions contemplated hereby and thereby have been duly and validly
     authorized by all the necessary action on the part of such Person and no
     other organization or similar proceedings on the part of such Person are
     necessary to authorize this Agreement, the Transition Services Agreement
     and the other agreements, documents and instruments to be executed and
     delivered in connection with this Agreement or the Transition Services
     Agreement or to consummate the transactions contemplated hereby and
     thereby. This Agreement, the Transition Services Agreement and the other
     agreements, documents and instruments to be executed and delivered in
     connection with this Agreement or the Transition Services Agreement has
     been duly and validly executed and delivered by such Person and assuming
     that this Agreement, the Transition Services Agreement and the other
     agreements, documents and instruments to be executed and delivered in
     connection with this Agreement or the Transition Services Agreement
     constitute legal, valid and binding agreements of the Seller are
     enforceable against such Person in accordance with their respective terms,
     except that such enforceability may be limited by applicable bankruptcy,
     insolvency, moratorium or other similar laws affecting or relating to
     enforcement of creditors' rights generally or general principles of equity.

          Section 4.3 Consents and Approvals.

          Except as set forth in Section 4.3 of the Buyer Disclosure Letter,
     such Person requires no consent, approval or authorization of, or filing,
     registration or qualification with, any Governmental Authority, or any
     other Person as a condition to the execution and delivery of this Agreement
     or the performance of the obligations hereunder, except where the failure
     to obtain such consent, approval or authorization of, or filing of,
     registration or qualification with, any Governmental Authority, or any
     other Person would not materially and adversely affect the ability of, or
     timing for, Seller to consummate the transactions contemplated by this
     Agreement or the Transition Services Agreement.

          Section 4.4 No Conflict or Violation.

          Except as set forth in Section 4.4 of the Buyer Disclosure Letter, the
     execution, delivery and performance by such Person of this Agreement does
     not:

               (a) violate or conflict with any provision of the organizational
     documents of such Person;

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<PAGE>

               (b) violate any applicable provision of a law, statute, judgment,
     order, writ, injunction, decree, award, rule or regulation of any
     Governmental Authority, except where such violation would not materially
     and adversely affect the ability of, or timing for, Seller to consummate
     the transactions contemplated by this Agreement or the Transition Services
     Agreement; or

               (c) violate, result in a breach of, constitute (with due notice
     or lapse of time or both) a default or cause any material obligation,
     penalty or premium to arise or accrue under any material contract, lease,
     loan, agreement, mortgage, security agreement, trust indenture or other
     material agreement or instrument to which such Person is a party or by
     which it is bound or to which any of its properties or assets is subject,
     except as would not materially and adversely affect the ability of, or
     timing for, Seller to consummate the transactions contemplated by this
     Agreement or the Transition Services Agreement.

          Section 4.5 Litigation.

          Except as identified in Section 4.5 of the Buyer Disclosure Letter,
     there are no Actions before any Governmental Authority or arbitration panel
     or tribunal pending or in progress or, to Knowledge of such Person,
     threatened, against such Person, or any of their respective Affiliates or
     any executive officer or director thereof, except as would not materially
     and adversely affect the ability of, or timing for, such Person to
     consummate the transactions contemplated by this Agreement or the
     Transition Services Agreement. Neither such Person nor any of its
     Affiliates are subject to any outstanding judgment, order, writ,
     injunction, decree or award entered in an Action to which such Person was a
     named party, except as would not materially and adversely affect the
     ability of, or timing for, such Person to consummate the transactions
     contemplated by this Agreement or the Transition Services Agreement.

          Section 4.6 Brokerage and Finders' Fees.

          Neither such Person nor any of its Affiliates, or their respective
     members, stockholders, partners, directors, officers or employees, has
     incurred, or will incur any brokerage, finders' or similar fee in
     connection with the transactions contemplated by this Agreement or the
     Transition Services Agreement.

          Section 4.7 Investment Representations.

               (a) Such Person is acquiring the Equity Interests to be acquired
     by it hereunder for its own account, solely for the purpose of investment
     and not with a view to, or for sale in connection with, any distribution
     thereof in violation of the federal securities laws or any applicable
     foreign or state securities law.

               (b) Such Person understands that the acquisition of the Equity
     Interests to be acquired by it pursuant to the terms of this Agreement
     involves substantial risk. Such Person and its officers have experience as
     an investor in securities and equity interests of companies such as the
     ones being transferred pursuant to this Agreement and acknowledges that it
     can bear the economic risk of its investment and has such

                                       21

<PAGE>

     knowledge and experience in financial or business matters that such Person
     is capable of evaluating the merits and risks of its investment in the
     Equity Interests to be acquired by it pursuant to the transactions
     contemplated hereby.

               (c) Such Person understands that the Equity Interests to be
     acquired by it hereunder have not been registered under the Securities Act
     on the basis that the sale provided for in this Agreement is exempt from
     the registration provisions thereof. Such Person acknowledges that such
     securities may not be transferred or sold except pursuant to the
     registration and other provisions of applicable securities laws or pursuant
     to an applicable exemption therefrom.

               (d) Such Person acknowledges that the offer and sale of the
     Equity Interests to be acquired by it in the transactions contemplated
     hereby has not been accomplished by the publication of any advertisement.

          Section 4.8 No Other Representations or Warranties.

          Except for the representations and warranties contained in this
     Article IV, neither such Person nor any other Person makes any other
     express or implied representation or warranty on behalf of such Person.

                                    ARTICLE V

                            COVENANTS OF THE PARTIES

          Section 5.1 Consents and Approvals.

               (a) Upon the terms and subject to the conditions of this
     Agreement, each of the parties hereto agrees to use, and will cause its
     Affiliates to use its reasonable best efforts to take, or cause to be
     taken, all actions, and to do, or cause to be done, all things necessary or
     advisable under Applicable Law to consummate and make effective the
     transactions contemplated by this Agreement as promptly as practicable
     including the preparation and filing of all forms, registrations and
     notices required to be filed by such party in order to consummate the
     transactions contemplated by this Agreement and the taking of such actions
     as are necessary to obtain any approvals, consents, orders, exemptions or
     waivers of Governmental Authorities required to be obtained by such party
     in order to consummate the transactions contemplated by this Agreement.
     Each party shall promptly consult with the other with respect to, provide
     any necessary information with respect to, and provide copies of all
     filings made by such party with any Governmental Entity or any other
     information supplied by such party to a Governmental Entity in connection
     with this Agreement and the Transition Services Agreement and the
     transactions contemplated hereby and thereby.

               (b) If any objections are asserted with respect to the
     transactions contemplated by this Agreement or the Transition Services
     Agreement under any anti-competition Law or if any suit or proceeding is
     instituted or threatened by any Governmental Entity or any private party
     challenging any of the transactions contemplated by this Agreement or the
     Transition Services Agreement as violative of any

                                       22

<PAGE>

     anti-competition Law, each of Seller and Buyer shall use its reasonable
     best efforts to promptly resolve such objections. Notwithstanding anything
     to the contrary in this Agreement, none of Seller or any of its Affiliates
     shall have any obligation to hold separate or divest any property or assets
     of Seller or any of its Affiliates in connection with any such claim under
     anti-competition law. In furtherance of the foregoing, Buyer shall, and
     shall cause its Affiliates to, take all action, including agreeing to hold
     separate or to divest any of the businesses or properties or assets of
     Buyer or any of its Affiliates (including the Equity Interests) and to
     terminate any existing relationships and contractual rights and
     obligations, as may be required (i) by the applicable Governmental Entity
     in order to resolve such objections as such Governmental Entity may have to
     such transactions under any anti-competition Law or (ii) by any domestic or
     foreign court or other tribunal, in any action or proceeding brought by a
     private party or Governmental Entity challenging such transactions as
     violative of any anti-competition Law, in order to avoid the entry of, or
     to effect the dissolution, vacating, lifting, altering or reversal of, any
     order that has the effect of restricting, preventing or prohibiting the
     consummation of the transactions contemplated by this Agreement or the
     Transition Services Agreement. In addition, Buyer shall, and shall cause
     its Affiliates to, vigorously defend any action or proceeding brought by a
     private party or Governmental Entity challenging the transactions
     contemplated hereby or by the Transition Services Agreement as violative of
     any anti-competition Law, in order to avoid the entry of, or to effect the
     dissolution, vacating, lifting, altering or reversal of, any order that has
     the effect of restricting, preventing or prohibiting the consummation of
     the transactions contemplated by this Agreement or the Transition Services
     Agreement (including by pursuing any available appeal process).

          Section 5.2 Further Assurances.

          On and after the date hereof, Seller and Buyer shall cooperate and use
     their respective reasonable best efforts to take or cause to be taken all
     appropriate actions and do, or cause to be done, all things necessary or
     appropriate to consummate and make effective the transactions contemplated
     hereby, including the execution of any additional assignment or similar
     documents or instruments of transfer of any kind, the obtaining of consents
     which may be reasonably necessary or appropriate to carry out any of the
     provisions hereof and the taking of all such other actions as such party
     may reasonably be requested to take by the other party hereto from time to
     time, consistent with the terms of this Agreement and the Transition
     Services Agreement, in order to effectuate the provisions and purposes of
     this Agreement and the Transition Services Agreement and the transactions
     contemplated hereby and thereby. Included without limitation within the
     foregoing assurances is Seller's agreement to take such further actions to
     evidence delivery to Buyer of title to the pipeline owned by the Jackson
     Pipeline Company in form and scope that is customary for properties of this
     type including obtaining at Seller's cost an opinion of outside counsel
     confirming the reasonable nature of such title if such an opinion is deemed
     necessary in the joint opinion of Buyer and Seller. As further detailed in
     the Transition Services Agreement, Seller shall continue to receive, record
     and deposit receivables of the Entities and irrevocably instruct the
     Entities' bank(s) to transfer all receipts to such bank and accounts as
     designated by Buyer in writing and to forward to Buyer all correspondence
     and invoices received by Seller that are directed to any of the Entities.

          Section 5.3 Employee Matters.

               (a) Subject to Section 5.3(b) and Section 5.3(c) below, on the
     date hereof (unless previously done), Seller shall give notice to all
     Affected Employees

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<PAGE>

     that the active participation of the Affected Employees in the Seller's and
     Entities' employee benefit plans, programs and arrangements (such plans,
     programs and arrangements, the "Seller Plans") shall terminate on the date
     hereof, and the Entities shall terminate participation of Affected
     Employees in the Seller Plans as of the date hereof. In addition, Seller
     shall retain all Liabilities and assets that arise with respect to current
     and former employees of the Entities by virtue of their employment with the
     Sellers or their Affiliates prior to the date hereof, including without
     limitation under the Pension Plan for Employees of Consumers Energy and
     Other CMS Energy Companies.

               (b) As of the date hereof, Buyer shall cause the Entities to
     continue to employ all of the Affected Employees for a period of at least
     six (6) months from and after the date hereof.

               (c) With respect to those employee benefit plans of Buyer or its
     Affiliates ("Buyer Plans") in which Affected Employees may participate on
     or after the date hereof, Buyer shall, and shall cause the Entities to,
     credit prior service of the Affected Employees with the Entities or other
     Affiliates of Seller for purposes of eligibility and vesting under Buyer
     Plans and for all purposes with respect to vacation, sick days and
     severance under such Buyer Plans. Affected Employees shall also be given
     pro rata credit for any deductible or co-insurance payment amounts payable
     in respect of the Buyer Plan year in which the date hereof occurs, to the
     extent that, following the date hereof, they participate in any Buyer Plan
     during such plan year for which deductibles or co-payments are required.

               (d) Buyer and the Entities shall be responsible for all
     Liabilities and obligations under the Worker Adjustment and Retraining
     Notification Act and similar foreign, state and local rules, statutes and
     ordinances resulting from the actions of Buyer and the Entities after the
     date hereof

               (e) CMS Energy Corporation or its Affiliates shall retain all
     assets that are accumulated as of date hereof under Financial Accounting
     Standards Board Statement 106 (and deposited in various VEBA accounts and
     401(h) accounts of Seller or its Affiliates). Further, Seller or its
     Affiliates shall retain the liability for post-employment benefits other
     than pensions ("PBOPs") for the benefit of former employees of the Entities
     who are retirees of the Entities as of the date hereof, and Affected
     Employees who are eligible to retire and qualified for benefits under PBOPs
     as of the date hereof, and Seller or its Affiliates shall retain the
     responsibility for providing post-retirement benefits to such employees
     pursuant to the eligibility requirements of the Seller Plans. It is the
     intent of the parties that Buyer shall have no obligation whatsoever with
     respect to pension or any other post-employment benefits that any employee
     of the Entities, whether current or retired, is entitled to as a result of
     employment with the Entities or its Affiliates prior to the date hereof.

          Section 5.4 Tax Covenants.

               (a) Tax Return Filings, Refunds, and Credits.

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<PAGE>

               (i) Seller shall timely prepare and file (or cause such
     preparation and filing) with the appropriate Tax authorities all Tax
     Returns (including any Consolidated Income Tax Returns) with respect to the
     Entities for Tax periods that end on or before the Cut-off Date (the
     "Seller Returns"), and will pay (or cause to be paid) all Taxes due with
     respect to the Seller Returns. The taxes shown on the Tax Returns shall be
     correct and complete insofar as the Entities are concerned.

               (ii) Buyer shall timely prepare and file (or cause such
     preparation and filing) with the appropriate Tax authorities all Tax
     Returns (the "Straddle Period Returns") with respect to the Entities for
     all Tax periods ending after the Cut-off Date that include the Cut-off Date
     (the "Straddle Period"). All Straddle Period Returns shall be prepared in
     accordance with past practice. Buyer shall provide Seller with copies of
     any Straddle Period Returns at least forty-five (45) days prior to the due
     date thereof (giving effect to any extensions thereto), accompanied by a
     statement (the "Straddle Statement") setting forth and calculating in
     reasonable detail the Pre-Cut-off Taxes as defined below. If Seller agrees
     with the Straddle Period Return and Straddle Statement, Seller shall pay to
     Buyer (or Buyer shall pay to Seller, if appropriate) an amount equal to the
     Pre-Cut-off Taxes as shown on the Straddle Statement not later than two (2)
     Business Days before the due date (including any extensions thereof) for
     payment of Taxes with respect to such Straddle Period Return. If, within
     fifteen (15) days of the receipt of the Straddle Period Return and Straddle
     Statement, Seller notifies Buyer that it disputes the manner of preparation
     of the Straddle Period Return or the amount calculated in the Straddle
     Statement, then Buyer and Seller shall attempt to resolve their
     disagreement within the five (5) days following Seller's notification or
     Buyer of such disagreement. If Buyer and Seller are unable to resolve their
     disagreement, the dispute shall be submitted to a mutually agreed upon
     nationally recognized independent accounting firm, whose expense shall be
     borne equally by Buyer and Seller, for resolution, if possible, within
     twenty (20) days of such submission. If the parties have not agreed on an
     independent accounting firm within fifteen days following Seller's
     notification of Buyer of such disagreement, on the request of any party
     such independent accounting firm shall be appointed by the ICC Centre. Any
     independent accounting firm appointed by the ICC Centre shall be an
     impartial and disinterested senior partner in an internationally recognized
     accounting firm. The decision of such accounting firm with respect to such
     dispute shall be binding upon Buyer and Seller, and Seller shall pay to
     Buyer (or Buyer shall pay to Seller, if appropriate) an amount equal to the
     Pre-Cut-off Taxes as decided by such accounting firm not later than two (2)
     Business Days before the due date (including any extensions thereof) for
     payment of Taxes with respect to such Straddle Period Return.

               (iii) From and after the Cut-off Date, Buyer and its Affiliates
     (including the Entities) will not file any amended Tax Return, carryback
     claim, or other adjustment request with respect to the Entities for any Tax
     period that includes or ends on or before the Cut-off Date unless Seller
     consents in writing; provided, however, that with respect to any Straddle
     Period Return, such

                                       25

<PAGE>

     consent shall not be unreasonably withheld, provided Buyer has made
     arrangements to the reasonable satisfaction of Seller to make Seller whole
     for any detriment or cost incurred (or to be incurred) by Seller as a
     result of such amended Tax Return, carryback claim or other adjustment
     request.

               (iv) For purposes of this Agreement, in the case of any Taxes of
     the Entities that are payable with respect to any Straddle Period, the
     portion of any such Taxes that constitutes "Pre-Cut-off Taxes" shall be the
     excess of (A) (i) in the case of Taxes that are either (x) based upon or
     related to income or receipts or (y) imposed in connection with any sale,
     transfer or assignment or any deemed sale, transfer or assignment of
     property (real or personal, tangible or intangible) be deemed equal to the
     amount that would be payable if the Tax period ended on the Cut-off Date
     and (ii) in the case of Taxes (other than those described in clause (i))
     imposed on a periodic basis with respect to the business or assets of the
     Entities, be deemed to be the amount of such Taxes for the entire Straddle
     Period (or, in the case of such Taxes determined on an arrears basis, the
     amount of such Taxes for the immediately preceding Tax period) multiplied
     by a fraction the numerator of which is the number of calendar days in the
     portion of the Straddle Period ending on the Cut-off Date and the
     denominator of which is the number of calendar days in the entire Straddle
     Period over (B) any prepayment or advances of Taxes or any payments of
     estimated Taxes with respect to the Straddle Period. For purposes of clause
     (i) of the preceding sentence, any exemption, deduction, credit or other
     item that is calculated on an annual basis shall be allocated to the
     portion of the Straddle Period ending on the Cut-off Date on a pro rata
     basis determined by multiplying the total amount of such item allocated to
     the Straddle Period by a fraction, the numerator of which is the number of
     calendar days in the portion of the Straddle Period ending on the Cut-off
     Date and the denominator of which is the number of calendar days in the
     entire Straddle Period. Pre-Cut-off Taxes include any Taxes attributable to
     a Person that is treated as a partnership for federal income tax purposes
     as if such Person allocated Tax items to its partners in a manner
     consistent with this Section 5.4(b)(iv). In the case of any Tax based upon
     or measured by capital (including net worth or long-term debt) or
     intangibles, any amount thereof required to be allocated under this Section
     5.6(b)(iv) shall be computed by reference to the level of such items on the
     Cut-off Date. The parties hereto will, to the extent permitted by
     Applicable Law, elect with the relevant Tax authority to treat a portion of
     any Straddle Period as a short taxable period ending as of the close of
     business on the Cut-off Date. For purposes of this Agreement, "Post-Cut-off
     Taxes" shall include any Taxes of the Entities that are payable with
     respect to a Straddle Period, except for the portion of
     any such Taxes that constitutes Pre-Cut-off Taxes. For avoidance of doubt,
     Michigan property taxes shall be prorated using the "statutory" method.

               (v) Seller and Buyer shall reasonably cooperate in preparing and
     filing all Tax Returns with respect to the Entities, including maintaining
     and making available to each other all records reasonably necessary

                                       26

<PAGE>

     in connection with Taxes of the Entities and in resolving all disputes and
     audits with respect to all Tax periods relating to Taxes of the Entities.

               (vi) For a period of seven (7) years after the Cut-off Date, the
     Seller and its Representatives shall have reasonable access to the books
     and records (including the right to make extracts thereof) of the Entities
     to the extent that such books and records relate to Taxes and to the extent
     that such access may reasonably be required by Seller in connection with
     matters relating to or affected by the operation of the Entities prior to
     the Cut-off Date. Such access shall be afforded by Buyer upon receipt of
     reasonable advance notice and during normal business hours. If Buyer shall
     desire to dispose of any of such books and records prior to the expiration
     of such seven-year period, Buyer shall, prior to such disposition, give
     Seller a reasonable opportunity, at Seller's expense, to segregate and
     remove such books and records as Seller may select.

               (vii) If an Indemnified Party actually receives a refund or
     credit or other reimbursement with respect to Taxes for which it would be
     indemnified under this Agreement, the Indemnified Party shall pay over such
     refund or credit or other reimbursement to the Indemnifying Party.

               (viii) Buyer shall not, and shall cause the Entities to not,
     make, amend or revoke any Tax election if such action would reasonably be
     expected to adversely affect any of Seller or its Affiliates with respect
     to any Tax period ending on or before the Cut-off Date or for the
     Pre-Cut-off portion of any Straddle Period or any Tax refund or credit with
     respect thereto.

               (ix) For purposes of this Agreement a "Consolidated Income Tax
     Return" is any income Tax Return filed with respect to any consolidated,
     combined, affiliated or unified group provided for under Section 1501 of
     the Code and the Treasury Regulations under Section 1502 of the Code, or
     any comparable provisions of Applicable Law, other than any income Tax
     Return that includes only any one of the Entities.

               (b) Indemnity for Taxes.

               (i) Seller hereby agrees to indemnify the Buyer and its
     Affiliates against and hold them harmless from all liability for (i) all
     Taxes imposed on the Entities with respect to Tax periods ending on or
     before the Cut-off Date, (ii) Pre-Cut-off Taxes with respect to any
     Straddle Period, and (iii) all Taxes that are attributable to Seller or any
     member (other than the Entities) of an affiliated, consolidated, combined
     or unitary Tax group of which at least one of the Entities was a member
     prior to the Cut-off Date that is imposed under Treasury Regulation Section
     1.1502-6 (or any similar provision of state, local or foreign Tax law) by
     reason of the Entities being included in any such Tax group.

               (ii) Buyer hereby agrees to indemnify Seller and its Affiliates
     against and hold them harmless from all liability for (A) all Taxes of the

                                       27
<PAGE>

     Entities with respect to all Tax periods beginning after the Cut-off Date,
     (B) Post-Cut-off Taxes with respect to any Straddle Period, and (C)
     Transfer Taxes.

               (iii) The obligation of Seller to indemnify and hold harmless
     Buyer, on the one hand, and the obligations of Buyer to indemnify and hold
     harmless Seller, on the other hand, pursuant to this Section 5.4, shall
     terminate upon the expiration of the applicable statutes of limitations
     with respect to the Tax Liabilities in question (giving effect to any
     waiver, mitigation or extension thereof).

               (iv) Any indemnification obligation under this Section 5.4(b)
     which relates to one of the Entities that is not wholly owned by Seller
     shall be reduced pro rata to reflect the elimination of the amount of Tax
     liability equivalent to the third-party's ownership percentage in such
     Entity.

               (c) Certain Payments. Buyer and Seller agree to treat (and cause
     their Affiliates to treat) any payment under this Section 5.4 as an
     adjustment to the Purchase Price for all Tax purposes.

               (d) Contests.

               (i) After the Cut-off Date, Seller and Buyer each shall notify
     the other party in writing within ten (10) days of the commencement of any
     Tax audit or administrative or judicial proceeding affecting the Taxes of
     any of the Entities that, if determined adversely to the taxpayer (the "Tax
     Indemnified Party") or after the lapse of time would be grounds for
     indemnification under this Section 5.4 by the other party (the "Tax
     Indemnifying Party" and a "Tax Claim"). Such notice shall contain factual
     information describing any asserted Tax liability in reasonable detail and
     shall include copies of any notice or other document received from any Tax
     authority in respect of any such asserted Tax liability. Failure to give
     such notification shall not affect the indemnification provided in this
     Section 5.4 except to the extent the Tax Indemnifying Party shall have been
     prejudiced as a result of such failure (except that the Tax Indemnifying
     Party shall not be liable for any expenses incurred during the period in
     which the Tax Indemnified Party failed to give such notice). Thereafter,
     the Tax Indemnified Party shall deliver to the Tax Indemnifying Party, as
     promptly as possible but in no event later than ten (10) days after the Tax
     Indemnified Party's receipt thereof, copies of all relevant notices and
     documents (including court papers) received by the Tax Indemnified Party.

               (ii) In the case of an audit or administrative or judicial
     proceeding involving any asserted liability for Taxes relating to any
     Taxable years or periods ending on or before the Cut-off Date or any
     Straddle Period, Seller shall have the right, at its expense, to control
     the conduct of such audit or proceeding; provided, however, that (A) with
     respect to Straddle Periods, Seller shall keep Buyer reasonably informed
     with respect to the status of such audit or proceeding and provide Buyer
     with copies of all written correspondence with

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<PAGE>

     respect to such audit or proceeding in a timely manner and (B) if such
     audit or proceeding would be reasonably expected to result in a material
     increase in Tax liability of the Entities for which Buyer would be liable
     under this Section 5.6, Buyer may participate in the conduct of such audit
     or proceeding at its own expense.

               (iii) In the case of an audit or administrative or judicial
     proceeding involving any asserted liability for Taxes relating to any
     Taxable years or periods beginning after the Cut-off Date, Buyer shall have
     the right, at its expense, to control the conduct of such audit or
     proceeding.

               (iv) Buyer and Seller shall reasonably cooperate in connection
     with any Tax Claim, and such cooperation shall include the provision to the
     Tax Indemnifying Party of records and information which are reasonably
     relevant to such Tax Claim and making employees available on a mutually
     convenient basis to provide additional information and explanation of any
     material provided hereunder.

               (e) Transfer and Similar Taxes. Notwithstanding any other
     provisions of this Agreement to the contrary, all sales, use, transfer,
     gains, stamp, duties, recording and similar Taxes (collectively, "Transfer
     Taxes") incurred in connection with the transactions contemplated by this
     Agreement shall be borne by Buyer, and Buyer shall accurately file all
     necessary Tax Returns and other documentation with respect to Transfer
     Taxes and timely pay all such Transfer Taxes. If required by Applicable
     Law, Seller will join in the execution of any such Return. Buyer shall
     provide copies of any Tax Returns with respect to Transfer Taxes to Seller
     no later than fifteen (15) days after the due dates of such Tax Returns.

               (f) Termination of Tax Sharing Agreements. On or prior to the
     Cut-off Date, Seller shall cause all Tax sharing agreements between the
     Seller or any of its Affiliates (as determined immediately after the
     Cut-off Date) on the one hand, and the Entities on the other hand, to be
     terminated, and all obligations thereunder shall be settled, and no
     additional payments shall be made under any provisions thereof after the
     Cut-off Date.

               (g) Special Rule. For purposes of applying this Section 5.4, when
     applying the definitions "Pre-Cut-off Taxes," "Post-Cut-off Taxes," and
     "Straddle Period," the term "Cut-off Date" as used in such definitions
     shall mean December 31, 2006.

          Section 5.5 Maintenance of Insurance Policies.

               (a) Seller and Buyer agree that Casualty Insurance Claims
     relating to the businesses of the Entities (including reported claims and
     including incurred but not reported claims) will remain with the Entities
     immediately following the consummation of the transaction contemplated in
     this Agreement. For purposes hereof, "Casualty Insurance Claims" shall mean
     workers' compensation, auto liability, general

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<PAGE>

     liability and products liability claims and claims for damages caused to
     the facilities of the Entities generally insured under all risk, real
     property, boiler and mechanical breakdown insurance coverage which are
     disclosed on Section 5.6(a) of the Seller Disclosure Letter. The Casualty
     Insurance Claims are subject to the provisions of policies of insurance
     with insurance carriers and contractual arrangements with insurance
     adjusters maintained by Seller or its Affiliates prior to the date hereof
     (collectively, the "Insurance Policies"). With respect to the Casualty
     Insurance Claims, the following procedures shall apply: (i) Seller or its
     Affiliates shall continue to administer, adjust, settle and pay, on behalf
     of the Entities, all Casualty Insurance Claims with dates of occurrence
     prior to the date of hereof and (ii) Seller shall invoice Buyer at the end
     of each month for Casualty Insurance Claims paid on behalf of the Entities
     by Seller. In the event that Buyer does not pay, or cause to be paid, to
     Seller such amount due within fifteen (15) days of such invoice, interest
     at the rate of ten percent (10%) per annum shall accrue on the amount of
     such invoice. Casualty Insurance Claims to be paid by Seller hereunder
     shall include all costs necessary to settle claims including compensatory,
     medical, legal and other allocated expenses. In the event that any Casualty
     Insurance Claims exceeds a deductible or self-insured retention under the
     Insurance Policies, Seller shall be entitled to the benefit of any
     insurance proceeds that may be available to discharge any portion of such
     Casualty Insurance Claim.

               (b) Seller makes no representation or warranty with respect to
     the applicability, validity or adequacy of any Insurance Policies, and
     Seller shall not be responsible to Buyer or any of its Affiliates for the
     failure of any insurer to pay under any such Insurance Policy.

               (c) Nothing in this Agreement is intended to provide or shall be
     construed as providing a benefit or release to any insurer or claims
     service organization of any obligation under any Insurance Policies. Seller
     and Buyer confirm that the sole intention of this Section 5.6 is to divide
     and allocate the benefits and obligations under the Insurance Policies
     between them as of the date hereof and not to effect, enhance or diminish
     the rights and obligations of any insurer or claims service organization
     thereunder. Nothing herein shall be construed as creating or permitting any
     insurer or claims service organization the right of subrogation against
     Seller or Buyer or any of their Affiliates in respect of payments made by
     one to the other under any Insurance Policy.

               (d) If Buyer requests a copy of an Insurance Policy relating to a
     pending or threatened Casualty Insurance Claim, Seller shall provide a copy
     of all relevant insurance policies which insure such Casualty Insurance
     Claims within five (5) Business Days, provided, that if Seller cannot
     provide such policy within five (5) days after exercising reasonable best
     efforts to locate such policy, Seller shall continue to exercise its
     reasonable best efforts to provide such policy to Buyer as soon as possible
     thereafter.

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<PAGE>

          Section 5.6 Transfers of Title and Possession of Assets of Entities.

          In those cases where a Material Contract, deed, easement, Permit,
     right of way or other asset was entered into or acquired for the benefit of
     one of the Entities or its business by any person other than one of the
     Entities, including an Affiliate of one of the Entities, and the rights and
     obligations of such Material Contract, deed, easement, Permit or other
     asset have not been assigned to one of the Entities as of the date hereof,
     Seller will use its reasonable best efforts at its reasonable expense to
     ensure that such assignments are made as soon as reasonably practicable.

          Section 5.7 Preservation of Records.

               (a) Buyer agrees that it shall, at its own expense, preserve and
     keep the records held by it relating to the respective businesses of the
     Entities that could reasonably be required after the consummation of the
     transaction contemplated in this Agreement by Seller for the time periods
     required pursuant to the applicable document retention program in effect on
     the date hereof (a copy of which has been provided to Buyer); provided,
     however, that upon expiration of such period, as applicable, Buyer shall
     give written notice to Seller if it or the custodian of such books and
     records proposes to destroy or dispose of the same. Seller shall have the
     opportunity for a period of thirty (30) days after receiving such notice to
     elect to have some or all of such books and records delivered, at Seller's
     expense and risk, to a location chosen by Seller. In addition, Buyer shall
     make such records available to Seller as may reasonably be required by
     Seller in connection with, among other things, any insurance claim, legal
     proceeding or governmental investigation relating to the respective
     businesses of Seller and its Affiliates, including the Entities. Seller
     agrees to maintain the confidentiality of all information provided by Buyer
     or the Entities hereunder during the time periods provided for in this
     Section.

               (b) Seller agrees that it shall, at its own expense, preserve and
     keep the records held by it relating to the respective business of the
     Entities which are contained in the records of Seller or its Affiliates
     that could reasonably be required after the consummation of the transaction
     contemplated by this Agreement by Seller for the time periods required
     pursuant to the applicable document retention program in effect on the date
     hereof. In addition, Seller shall make such records available to Buyer as
     may reasonably be required by Buyer in connection with, among other things,
     any insurance claim, legal proceeding or governmental investigation
     relating to the Entities.

          Section 5.8 Public Statements.

          No public or private release, announcement or regulatory filing
     concerning the transactions contemplated hereby shall be issued by any of
     the parties without the prior consent of the other parties (which consent
     shall not unreasonably withheld), except for such press release,
     announcement or regulatory filing as is required by law, court process or
     stock exchange rule to be made by the party proposing to issue the same, in
     which case such party shall use its reasonable best efforts to consult in
     good faith with the other party prior to the issuance of any such press
     release, announcement or filing.

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<PAGE>

          Section 5.9 Use of Corporate Name; Transitional Use of Seller's Name.

          Promptly after the consummation of the transaction contemplated
     hereby, Buyer shall cause each of the Entities to make any necessary legal
     filings with the appropriate Governmental Authorities to register the
     change in their corporate names to names that do not include "CMS". Buyer
     and its Affiliates shall hold harmless and indemnify Seller and any of its
     Affiliates against all Damages resulting from or arising in connection with
     the use by Buyer or any of its Affiliates of the "CMS" name as provided in
     this Section 5.11.

          Section 5.10 Release of Guarantees.

          Unless previously done, Buyer shall, as soon as reasonably
     practicable, either (a) arrange for substitute letters of credit,
     guarantees and other obligations on commercially reasonable terms to
     replace in all respects the indemnities, performance bonds, performance
     guarantees, other guaranty obligations, letters of credit and other similar
     arrangements of Seller or its Affiliates (collectively, the "Released
     Parties") in favor of any of the Entities (collectively, "Guarantees" as
     further disclosed in Section 5.10 of the Seller Disclosure Letter) or (b)
     assume all obligations under each such Guarantee, obtaining from the
     creditor or other counter-party a full release of the Released Parties. As
     soon as reasonably practicable, Buyer shall terminate, or cause Buyer or
     one of its Affiliates to be substituted in all respects for the Released
     Parties in respect of, all obligations of the Released Parties under any
     such Guarantee. Buyer shall, to the extent the beneficiary or counter-party
     under any Guarantee refuses to accept such a substitute letter of credit,
     (i) obtain a letter of credit on behalf of Buyer and (ii) indemnify and
     hold harmless the Released Parties for any Losses arising from payments
     under such Guarantees that relate to events or circumstances arising after
     the date hereof. To the extent that any Released Party has performance
     obligations under any such Guarantee, Buyer shall (i) perform such
     obligations on behalf of such Released Party or (ii) otherwise take such
     action as reasonably requested by Seller so as to put such Released Party
     in the same position as if Buyer, and not such Released Party, had
     performed or was performing such obligations.

          Section 5.11 Confidentiality.

          Each of Buyer and Seller will hold, and will cause its Representatives
     to hold, in confidence, unless compelled to disclose by judicial or
     administrative process or by other requirements of Law, all confidential
     documents and information concerning the Entities furnished to Buyer in
     connection with the transactions contemplated by this Agreement, except to
     the extent that such information can be shown to have been (i) previously
     known on a non-confidential basis by Buyer or Seller, (ii) in the public
     domain through no fault of Buyer or Seller or (iii) later lawfully acquired
     by Buyer or Seller from sources other than the the other party; provided
     that Buyer may disclose such information to its Representatives in
     connection with the transactions contemplated by this Agreement so long as
     such Persons are informed by Buyer of the confidential nature of such
     information and are directed by Buyer to treat such information
     confidentially. The obligation of each of Buyer and Seller to hold any such
     information in confidence shall

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<PAGE>

     be satisfied if it exercises the same care with respect to such information
     as it would take to preserve the confidentiality of their own similar
     information.

                                   ARTICLE VI

                            SURVIVAL; INDEMNIFICATION

          Section 6.1 Survival.

               (a) All representations and warranties contained herein shall
     survive for a period of twelve (12) months following the date hereof except
     for the representations and warranties of Seller set forth in Sections 3.1,
     3.2, and 3.3, and of Buyer in Sections 4.1 and 4.2, which shall survive
     indefinitely and those in Section 3.15 which shall survive for the
     applicable statutes of limitation periods referred to therein (such periods
     set forth above are referred to herein as the relevant "Indemnity Period").
     The parties intend to shorten the statute of limitations and agree that no
     claims or causes of action may be brought against Seller, Buyer or any of
     their respective directors, officers, employees, Affiliates, controlling
     persons, agents or Representatives based upon, directly or indirectly, any
     of the representations and warranties contained in this Agreement after the
     Indemnity Period; provided that if a written notice of claim for
     indemnification is made during the applicable Indemnity Period in
     accordance with this Article VIII, such claim shall survive until its
     resolution.

               (b) All covenants and agreements contained herein that by their
     terms are to be performed in whole or in part, or which prohibit actions,
     subsequent to the date hereof, shall survive the consummation of the
     transaction contemplated hereby in accordance with their terms.

               (c) Seller hereby covenants that CMS Enterprises Company shall
     maintain a consolidated net worth of at least $10,000,000 for a period of
     twelve (12) months following the date hereof.

          Section 6.2 Indemnification.

               (a) Subject to the limitations set forth in this Article VI,
     subsequent to the consummation of the transaction contemplated hereby,
     Seller shall indemnify, defend, save and hold harmless Buyer and its
     Affiliates, their respective successors and permitted assigns, and their
     officers and directors (collectively, the "Buyer Indemnified Parties"),
     from and against any and all Damages incurred by a Buyer Indemnified Party
     arising out of, resulting from or incurred in connection with:

               (i) any breach or inaccuracy of any representation or warranty of
     Seller contained in this Agreement, in each case, when made or deemed made;
     and

               (ii) any breach in any material respect by Seller of any covenant
     or agreement contained in this Agreement.

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<PAGE>

               (b) Subject to the limitations set forth in this Article VI,
     subsequent to the consummation of the transaction contemplated by this
     Agreement, Buyer shall indemnify, defend, save and hold harmless Seller and
     its Affiliates, their respective successors and permitted assigns, and
     their officers and directors (collectively, the "Seller Indemnified
     Parties") from and against any and all Damages to the extent incurred by
     the Seller Indemnified Party arising out of, resulting from or incurred in
     connection with:

               (i) any breach or inaccuracy of any representation or warranty of
     such Buyer contained in this Agreement, in each case, when made or deemed
     made. For the avoidance of doubt, it is expressly understood that each of
     Lucid and Michigan Pipeline and Processing, LLC shall be severally, and not
     jointly, liable for Damages incurred by a Seller Indemnified Party as a
     result of a breach or inaccuracy of any representation or warranty made by
     such Person or for the breach of confidentiality obligations governed by
     Section 5.15 and, as a result, a Seller Indemnified Party shall not be
     entitled to make a Claim, seek contribution, assert joint and several
     liability or otherwise seek indemnification against the other Buyer based
     on such breach or inaccuracy or breach of confidentiality obligations; and

               (ii) any breach in any material respect by Buyer of any covenant
     or agreement contained in this Agreement.

               (c) Any Person providing indemnification pursuant to the
     provisions of this Section 6.2 is referred to herein as an "Indemnifying
     Party," and any Person entitled to be indemnified pursuant to the
     provisions of this Section 6.2 is referred to herein as an "Indemnified
     Party."

               (d) Seller's indemnification obligations contained in Section
     6.2(a)(i) shall not apply to any Claim for Damages unless and until the
     aggregate of all such Damages exceeds $300,000 (the "Threshold Amount"), in
     which event Seller's indemnity obligation contained in Section 6.2(a)(i)
     shall apply to all Claims for Damages in excess of the Threshold Amount,
     subject to a maximum liability to Seller, in the aggregate, of $5,000,000
     (the "Cap Amount"); provided, however, that any Claims for Damages for
     breach of the representations and warranties set forth in Section 3.1,
     Section 3.2 and Section 3.3, shall not be subject to the Threshold Amount,
     Cap Amount or Minimum Claim Amount (as defined below). Damages relating to
     any single breach or series of related breaches of Seller's representations
     and warranties shall not constitute Damages, and therefore shall not be
     applied towards the Threshold Amount or be indemnifiable hereunder, unless
     such Damages relating to any single breach or series of related breaches
     exceed $25,000 (the "Minimum Claim Amount").

               (e) Buyer's indemnification obligations contained in Section
     6.2(b)(i) shall not apply to any Claim for Damages unless and until the
     aggregate of all such Damages equals the Threshold Amount, in which event
     Buyer's indemnification obligation contained in Section 862(b)(i) shall
     apply to all Claims for Damages in excess of the Threshold Amount, subject
     to a maximum liability to the

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<PAGE>

     Buyer, in the aggregate, of the Cap Amount. Damages relating to any single
     breach or series of related breaches of Buyer's representations and
     warranties shall not constitute Damages, and therefore shall not be applied
     towards the Threshold Amount or be indemnifiable hereunder, unless such
     Damages relating to any single breach or series of related breaches exceed
     the Minimum Claim Amount.

               (f) The indemnification obligations of each party hereto under
     this Section 6.2 shall inure to the benefit of the Buyer Indemnified
     Parties and Seller Indemnified Parties, and such Buyer Indemnified Parties
     and Seller Indemnified Parties shall be obligated to keep and perform the
     obligations imposed on an Indemnified Party by this Section 6.2, on the
     same terms as are applicable to such other party.

               (g) In all cases in which a Person is entitled to be indemnified
     in accordance with this Agreement, such Indemnified Party shall be under a
     duty to take all commercially reasonable measures to mitigate all losses.

               (h) Notwithstanding any other provision of this Agreement, claims
     for indemnification with respect to Tax matters shall be governed by the
     provisions of Section 5.4 and claims for Environmental matters shall be
     governed by Section 6.6 of this Agreement, but in each such case the
     indemnification obligations for each party hereto shall remain subject to
     the remaining provisions of Section 6.2 including without limitation the
     application of the Cap Amount, Threshold Amount and Minimum Claim Amount.

               (i) Notwithstanding any other provision of this Agreement, in no
     event shall any Indemnified Party be entitled to indemnification pursuant
     to this Article VI to the extent any Damages were attributable to such
     Indemnified Party's own gross negligence or willful misconduct.

               (j) The remedies provided in this Article VI shall be deemed the
     sole and exclusive remedies of the parties, from and after the date hereof,
     with respect to this Agreement and the transactions contemplated hereby.

          Section 6.3 Calculation of Damages.

               (a) The amount of any Damages suffered by any party hereto shall
     be reduced by (i) any amount that is reserved for sums held in reserve in
     respect of the indemnifiable event on the balance sheet of the Entities, as
     applicable, as of December 31, 2006 to the extent such Damages are suffered
     by a Buyer Indemnified Party, or (ii) any amount that an Indemnified Party
     is entitled to receive with respect thereto under any third party insurance
     coverage or from any other party alleged to be responsible therefor.

               (b) If an Indemnified Party makes a claim for indemnification
     under this Article VI, the Indemnified Party shall use its reasonable best
     efforts to collect any amounts available under such insurance coverage and
     from such other party alleged to have responsibility. If an Indemnified
     Party receives an amount under insurance coverage or from such other party
     with respect to Damages at any time subsequent to any

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<PAGE>

     indemnification provided by Seller or Buyer, as the case may be, pursuant
     to this Article VI, then such Indemnified Party shall promptly reimburse
     the Indemnifying Party for any payment made or expense incurred by the
     Indemnifying Party in connection with providing such indemnification up to
     such amount received by the Indemnified Party, but net of any expenses
     incurred by the Indemnified Party in collecting such amount. To the extent
     the Indemnifying Party makes any indemnification payment pursuant to this
     Article VII in respect of Damages for which an Indemnified Party has a
     right to recover against a third party (including an insurance company),
     the Indemnifying Party shall be subrogated to the right of the Indemnified
     Party to seek and obtain recovery from such third party; provided, however,
     that if the Indemnifying Party shall be prohibited from such subrogation,
     the Indemnified Party shall seek recovery from such third party on the
     Indemnifying Party's behalf and pay any such recovery to the Indemnifying
     Party net of expenses.

          Section 6.4 Procedures for Third-Party Claims.

          The obligations of any Indemnifying Party to indemnify any Indemnified
     Party under this Article VI with respect to Claim for Damages by third
     parties (including Governmental Entities) (a "Third-Party Claim"), shall be
     subject to the following terms and conditions:

               (a) The Indemnified Party shall give the Indemnifying Party
     written notice of any such Third-Party Claim reasonably promptly after
     learning of such Third-Party Claim, and the Indemnifying Party may, at its
     option, undertake the defense thereof by Representatives of its own
     choosing and reasonably acceptable to the Indemnified Party, and shall
     provide written notice of any such undertaking to the Indemnified Party.
     Failure to give prompt written notice of a Third-Party Claim hereunder
     shall not affect the Indemnifying Party's obligations under this Article
     VI, except to the extent that the Indemnifying Party is actually prejudiced
     by such failure to give prompt written notice. The Indemnified Party shall,
     and shall cause its employees and Representatives to, cooperate reasonably
     with the Indemnifying Party in connection with the settlement or defense of
     such Third-Party Claim and shall provide the Indemnifying Party with all
     available information and documents concerning such Third-Party Claim. The
     Indemnifying Party shall provide the Indemnified Party with copies of all
     non-privileged communications and other information in respect of the
     Third-Party Claim. If the Indemnifying Party, within thirty (30) days after
     written notice of any such Third-Party Claim, fails to assume the defense
     of such Third-Party Claim, or, after assuming defense, negligently fails to
     defend and fails to call after reasonable written notice of the same, the
     Indemnified Party against whom such Third-Party Claim has been made shall
     (upon further written notice to the Indemnifying Party) have the right to
     undertake the defense, compromise or settlement of such Third-Party Claim
     on behalf of and for the account and risk, and at the expense, of the
     Indemnifying Party, subject to the right of the Indemnifying Party to
     assume the defense of such Third-Party Claim at any time prior to
     settlement, compromise or final determination thereof upon written notice
     to the Indemnified Party.

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<PAGE>

               (b) Anything in this Section 6.4 to the contrary notwithstanding,
     (i) the Indemnified Party shall not settle a Third-Party Claim for which it
     is indemnified without the prior written consent of the Indemnifying Party,
     which consent shall not be unreasonably withheld, conditioned or delayed
     and (ii) the Indemnifying Party shall not enter into any settlement or
     compromise of any action, suit or proceeding, or consent to the entry of
     any judgment for relief other than monetary damages to be borne by the
     Indemnifying Party, without the prior written consent of the Indemnified
     Party, which consent shall not be unreasonably withheld, conditioned or
     delayed.

          Section 6.5 Procedures for Inter-Party Claims.

          In the event that an Indemnified Party determines that it has a Claim
     for Damages against an Indemnifying Party hereunder (other than as a result
     of a Third-Party Claim), the Indemnified Party shall give reasonably prompt
     written notice thereof to the Indemnifying Party, specifying the amount of
     such Claim and any relevant facts and circumstances relating thereto, and
     such notice shall be promptly given even if the nature or extent of the
     Damages is not then known. The notification shall be subsequently
     supplemented within a reasonable time as additional information regarding
     the Claim or the nature or extent of Damages resulting therefrom becomes
     available to the Indemnified Party. Any failure to give such reasonably
     prompt notice or supplement thereto or to provide any such facts and
     circumstances will not waive any rights of the Indemnified Party, except to
     the extent that the rights of the Indemnifying Party are actually
     materially prejudiced thereby. The Indemnified Party and the Indemnifying
     Party shall attempt to negotiate in good faith for a thirty-day (30-day)
     period regarding the resolution of any disputed Claims for Damages. If for
     any reason, such dispute cannot be resolved by negotiation, on the request
     of any party it shall be resolved by arbitration in accordance with Section
     9.8 herein. Promptly following the final determination of the amount of any
     Damages claimed by the Indemnified Party, the Indemnifying Party, subject
     to the limitations of the Minimum Claim Amount, Threshold Amount and the
     Cap Amount, shall pay such Damages to the Indemnified Party by wire
     transfer of immediately available funds.

          Section 6.6 Special Indemnification Provision Relating to
     Environmental Matters.

               (a) Buyer shall indemnify and hold the Seller harmless from all
     Damages arising in any way from the matters disclosed in Section 6.6(a) of
     the Seller Disclosure Letter. This includes, without limitation, all
     Damages arising from non-compliance with, or remediation under, any
     Environmental Law that arise out of actions or omissions that occurred
     before the date hereof and that have been disclosed to Buyer in Section
     6.6(a) of the Seller Disclosure Letter. It is further agreed that nothing
     herein shall be deemed to require Seller to pursue any insurance or other
     third party claims, or, if received, to pay over any insurance or other
     third party proceeds to Buyer, in connection with the foregoing matters.

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<PAGE>

               (b) Buyer shall indemnify and hold the Seller harmless from all
     Damages resulting from non-compliance with, or remediation under, any
     Environmental Law that arise out of actions or omissions that occur after
     the date hereof.

               (c) Seller shall indemnify and hold Buyer harmless from all
     Damages under any Environmental Law that arise out of actions or omissions
     that occurred before the date hereof but were not disclosed in the Seller
     Disclosure Letter, if they relate to matters as to which written
     notification is given by Buyer to Seller during a period ending one year
     after the date hereof.

          To the extent, if any, that Seller may have responsibility for
     responding to any non-compliance or requirement for remediation under any
     Environmental Law with respect to a period for which it has indemnification
     obligations hereunder, Buyer shall reasonably cooperate with environmental
     response activities of Seller on the property of the Entities being
     transferred pursuant to this Agreement. Buyer shall ensure that Seller has
     reasonable access at all such times to investigate, monitor, and remediate
     said property, and to install, operate, and maintain facilities for the
     containment or treatment of the soil and groundwater, and to perform other
     environmental remediation and response activities, which shall not
     unreasonably interfere with the business of the Buyer or the Entities. In
     the event of an environmental remediation with respect to a period for
     which Seller may have indemnification obligations hereunder, Seller may
     elect to perform a cleanup in accordance with applicable industrial cleanup
     standards or (if applicable at the time of cleanup) commercial III or IV
     cleanup standards under the Michigan Natural Resources and Environmental
     Protection Act, Part 201 (Part 201), or similar standards which may be
     allowed under Michigan law in the future. In connection with such a
     cleanup, Buyer agrees to impose restrictions upon future use of the
     property, if required, including the restrictions required under Mich.
     Comp. Laws Section 324.20120a(1)(b) or (d). These may be included in a
     declaration of restrictive covenants, in the form approved by the Michigan
     Department of Environmental Quality, and which must be signed by Buyer and
     filed with the Register of Deeds. By way of example and not of limitation,
     these may include restrictions on site uses to commercial or industrial
     uses consistent with the cleanup standards, restrictions on groundwater
     use, and provisions for appropriate management of soils in accordance with
     the requirements of Part 201, provided, however, (i) Seller shall conduct
     any and all such investigation, monitoring, and remediation in compliance
     with applicable Environmental Laws; (ii) cleanup standards or cleanup
     criteria applicable to any remedial action by Seller at the property shall
     not be in any way inconsistent with current use of the subject property or
     expansion of uses of a similar nature at the property; (iii) no
     restrictions, declarations or covenants to be imposed on the subject
     property or recorded in the public registry shall be in any way
     inconsistent with current use of the subject property or expansion of uses
     of a similar nature at the property; and (iv) reasonable efforts shall be
     made to minimize the applicable area for any restrictions, declarations or
     covenants to be imposed on the subject property or recorded in the public
     registry by limiting them to portions of the property that are subject to
     such remedial actions.

                                       38

<PAGE>

          In regard to the matters covered by this Section 6.6, each party shall
     at all times act reasonably so as to avoid unnecessarily exposing the other
     party to liability under this Section 6.6 or to otherwise unnecessarily
     cause the other party to incur costs or expenses.

                                   ARTICLE VII

                            MISCELLANEOUS PROVISIONS

          Section 7.1 Interpretation.

               (a) Unless the context of this Agreement otherwise requires, (a)
     words of any gender include the other gender; (b) words using the singular
     or plural number also include the plural or singular number, respectively;
     (c) the terms "hereof," "herein," "hereby" and derivative or similar words
     refer to this entire Agreement; (d) the terms "Article," "Section" and
     "Exhibit" refer to the specified Article, Section and Exhibit of this
     Agreement, respectively; and (e) "including," shall mean "including, but
     not limited to"; and (v) 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 (whether real or personal).
     Unless otherwise expressly provided, any agreement, instrument, law or
     regulation defined or referred to herein means such agreement, instrument,
     law or regulation as from time to time amended, modified or supplemented,
     including (in the case of agreements or instruments) by waiver or consent
     and (in the case of a law or regulation) by succession of comparable
     successor law and includes (in the case of agreements or instruments)
     references to all attachments thereto and instruments incorporated therein.

               (b) For purposes of Article III and all covenants and obligations
     of Seller hereunder including indemnification obligations of Article VI,
     all representations, warranties, covenants and obligations made by Seller
     shall be deemed to be jointly and severally made by each Seller entity.

               (c) For purposes of Article V, in the event that Seller shall be
     obligated to cause, or use its reasonable best efforts to cause, an
     Affiliate over which it does not have voting control to act or not act,
     directly or indirectly through the exercise of equity voting rights or
     contractual and other rights, it shall be obligated to exercise all of its
     contractual and other rights to cause such action or inaction by such
     Affiliate.

          Section 7.2 Disclosure Letters.

          The Seller Disclosure Letter and the Buyer Disclosure Letter are
     incorporated into this Agreement by reference and made a part hereof.

          Section 7.3 Payments.

          All payments set forth in this Agreement and the Transition Services
     Agreement are in United States Dollars. Such payments shall be made by wire
     transfer of immediately available funds or by such other means as the
     parties to such payment shall designate.

                                       39

<PAGE>

          Section 7.4 Expenses.

          Except as expressly set forth herein, or as agreed upon in writing by
     the parties, each party shall bear its own costs, fees and expenses,
     including the expenses of its representatives, incurred by such party in
     connection with this Agreement and the Transition Services Agreement and
     the transaction contemplated hereby and thereby.

          Section 7.5 Choice of Law.

          THIS AGREEMENT, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND
     PERFORMANCE, SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS
     OF THE STATE OF MICHIGAN, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OR
     CHOICE OF LAWS OR ANY OTHER LAW THAT WOULD MAKE THE LAWS OF ANY OTHER
     JURISDICTION OTHER THAN THE STATE OF MICHIGAN APPLICABLE HERETO.

          Section 7.6 Assignment.

          This Agreement may not be assigned by either party without the prior
     written consent of the other party; provided, however, that without the
     prior written consent of the other party, each party shall have the right
     to assign its rights and obligations under this Agreement to any third
     party successor and/or its Affiliates to all or substantially all of its
     entire business.

          Section 7.7 Notices.

          All demands, notices, consents, approvals, reports, requests and other
     communications hereunder must be in writing, will be deemed to have been
     duly given only if delivered personally or by facsimile transmission (with
     confirmation of receipt) or by an internationally-recognized express
     courier service or by mail (first class, postage prepaid) to the parties at
     the following addresses or telephone or facsimile numbers and will be
     deemed effective upon delivery; provided, however, that any communication
     by facsimile shall be confirmed by an internationally-recognized express
     courier service or regular mail.

                                       40

<PAGE>

               (i)  If to the Seller:
                    CMS Enterprises Company
                    One Energy Plaza
                    Jackson, Michigan 49201
                    Attention: General Counsel
                    Telephone: (517)788-0550
                    Facsimile: (517)788-1671

                    With a required copy to:

                    Miller, Canfield, Paddock and Stone, PLC
                    101 North Main Street, 7th Floor
                    Ann Arbor, Michigan 48104
                    Attention: Michael D. VanHemert
                    Telephone: (734)668-7117
                    Facsimile: (734)747-7147

               (ii) If to Buyer:
                    Lucid Energy, L.L.C.
                    30078 Schoenherr, Suite 150
                    Warren, Michigan
                    Attention: Rai Bhargava/Manouch Daneshvar
                    Telephone: (586)445-2300
                    Facsimile: (586)445-1782

                    With a required copy to:

                    Ufer & Spaniola, P.C.
                    5440 Corporate Drive, Suite 250
                    Troy, Michigan 48098-2648
                    Attention: Gerald Van Wyke, Esquire
                    Telephone: (248)641-7000
                    Facsimile: (248)641-5120

     or to such other address as the addressee shall have last furnished in
     writing in accord with this provision to the addressor.

          Section 7.8 Resolution of Disputes.

          Except for the resolution of disputes that shall be resolved in
     accordance with the procedures set forth in sections 5.5 and 6.5 herein,
     all disputes arising out of or relating to this Agreement or any Transition
     Services Agreement or the breach, termination or validity thereof or the
     parties' performance hereunder or thereunder ("Dispute") shall be resolved
     as provided by this Section 7.8.

                                       41

<PAGE>

               (a) If the Dispute has not been resolved by executive officer
     negotiation within thirty (30) days of the disputing party's notice
     requesting negotiation, or if the parties fail to meet within twenty (20)
     days from delivery of said notice, such Dispute shall be submitted to and
     finally settled by arbitration in accordance with the Rules of Arbitration
     of the International Chamber of Commerce in Detroit, Michigan ("ICC") then
     in effect (the "Rules"), except as modified herein.

               (b) The arbitration shall be held, and the award shall be
     rendered, in the English language. There shall be three arbitrators, one of
     whom shall be nominated by each of Buyer and Seller in accordance with the
     Rules. The two party appointed arbitrators shall have thirty (30) days from
     the confirmation of the nomination of the second arbitrator to agree on the
     nomination of a third arbitrator who shall serve as chair of the arbitral
     tribunal. On the request of any party, any arbitrator not timely appointed
     in accordance with this Agreement or the Rules shall be appointed by the
     ICC.

               (c) The award shall be final and binding upon the parties as from
     the date rendered, and shall be the sole and exclusive remedy between the
     parties regarding any claims, counterclaims, issues, or accounting
     presented to the arbitral tribunal. Judgment upon any award may be entered
     and enforced in any court having jurisdiction over a party or any of its
     assets. For the purpose of the enforcement of an award, the parties
     irrevocably and unconditionally submit to the jurisdiction of a competent
     court in any jurisdiction in which a party may have assets and waive any
     defenses to such enforcement based on lack of personal jurisdiction or
     inconvenient forum. This Agreement and the rights and obligations of the
     parties shall remain in full force and effect pending the award in any
     arbitration proceeding hereunder.

               (d) The Parties agree that any court action or proceeding to
     compel or in support of arbitration or for provisional remedies in aid of
     arbitration, including but not limited to any action to enforce the
     provisions of this Section 7.8, for temporary injunctive relief maintain
     the status quo or prevent irreparable harm prior to the appointment of the
     arbitral tribunal, shall be brought exclusively in the federal or state
     courts located in Jackson, Michigan (the "Michigan Courts"). The Parties
     hereby unconditionally and irrevocably submit to the exclusive jurisdiction
     of the Michigan Courts for such purpose, and to the non-exclusive
     jurisdiction of the Michigan Courts in any action to enforce any
     arbitration award rendered hereunder, and waive any right to stay or
     dismiss any such actions or proceedings brought before the Michigan Courts
     on the basis of forum non conveniens or improper venue. Without prejudice
     to such provisional remedies as may be available under the jurisdiction of
     a national court, the arbitral tribunal shall have full authority to grant
     provisional remedies and to direct the parties to request that any court
     modify or vacate any temporary or preliminary relief issued by such court,
     and to award damages for the failure of any party to respect the arbitral
     tribunal's orders to that effect.

          Section 7.9 No Right of Setoff.

          Neither party hereto nor any Affiliate thereof may deduct from, set
     off, holdback or otherwise reduce in any manner whatsoever any amount owed
     to it hereunder or

                                       42

<PAGE>

     pursuant to the Transition Services Agreement or any agreement related to
     the sale of the Argentine Businesses (the "Argentine Transaction
     Documents") against any amounts owed hereunder or pursuant to the
     Transition Services Agreement or the Argentine Transaction Documents by
     such Persons to the other party hereto or any of such other party's
     Affiliates.

          Section 7.10 Time is of the Essence.

          Time is of the essence in the performance of the provisions of this
     Agreement.

          Section 7.11 Specific Performance.

          Each party acknowledges and agrees that any breach of any provision of
     this Agreement would cause irreparable harm to the other party. Each party,
     without prejudice to any rights to judicial relief it may otherwise have,
     shall be entitled to equitable relief, including injunction and specific
     performance. Each party agrees that it will not oppose the granting of such
     relief on the basis that the other party has not suffered irreparable harm
     or that the other party has an adequate remedy at law. Each party agrees
     that it will not seek and agrees to waive any requirement for the securing
     or posting of a bond in connection with the other party's seeking or
     obtaining such relief.

          Section 7.12 Entire Agreement.

          This Agreement, together with the Seller Disclosure Letter, Buyer
     Disclosure Letter, Annex I, the Exhibits hereto, the Transition Services
     Agreement and the Confidentiality Agreement constitute the entire agreement
     between the parties hereto with respect to the subject matter herein and
     supersede all previous agreements, whether written or oral, relating to the
     subject matter of this Agreement and all prior drafts of this Agreement,
     all of which are merged into this Agreement. No prior drafts of this
     Agreement and no words or phrases from any such prior drafts shall be
     admissible into evidence in any action or suit involving this Agreement. In
     the case of any material conflict between any provision of this Agreement
     and any other agreement including the Transition Services Agreement, this
     Agreement shall take precedence.

          Section 7.13 Binding Nature; Third Party Beneficiaries.

          This Agreement shall be binding upon and inure solely to the benefit
     of the parties hereto and their respective successors (whether by operation
     of law or otherwise) and permitted assigns. Except as expressly provided
     herein, none of the provisions of this Agreement shall be for the benefit
     of or enforceable by any third party, including any creditor of either
     party or any of their Affiliates. Except as expressly provided herein, no
     such third party shall obtain any right under any provision of this
     Agreement or shall by reasons of any such provision make any Claim in
     respect of any Liability (or otherwise) against either party hereto.

                                       43

<PAGE>

          Section 7.14 Counterparts.

     This Agreement may be executed in two (2) or more counterparts, each of
     which, when executed, shall be deemed to be an original and both of which
     together shall constitute one and the same document. Any counterpart or
     other signature to this Agreement that is delivered by facsimile or
     electronic mail shall be deemed for all purposes as constituting good and
     valid execution and delivery by such party of this Agreement.

          Section 7.15 Severability.

          If any provision of this Agreement is held to be illegal, invalid or
     unenforceable under any applicable present or future law, and if the rights
     or obligations of either party under this Agreement will not be materially
     and adversely affected thereby, (i) such provision shall be fully
     severable, (ii) this Agreement shall be construed and enforced as if such
     illegal, invalid or unenforceable provision had never comprised a part
     hereof, (iii) the remaining provisions of this Agreement shall remain in
     full force and effect and shall not be affected by the illegal, invalid or
     unenforceable provision or by its severance herefrom and (iv) in lieu of
     such illegal, invalid or unenforceable provision, there shall be added
     automatically as a part of this Agreement, a legal, valid and enforceable
     provision as similar in terms to such illegal, invalid or unenforceable
     provision as may be possible.

          Section 7.16 Headings.

          The headings used in this Agreement have been inserted for convenience
     of reference only and do not define or limit the provisions hereof.

          Section 7.17 Waiver.

          Any term or condition of this Agreement may be waived at any time by
     the party that is entitled to the benefit thereof, but no such waiver shall
     be effective unless set forth in a written instrument duly executed by or
     on behalf of the party or parties waiving such term or condition. No waiver
     by any party of any term or condition of this Agreement, in any one or more
     instances, shall be deemed to be or construed as a waiver of the same or
     any other term or condition of this Agreement on any future occasion. All
     remedies, either under this Agreement or by law or otherwise afforded, will
     be cumulative and not alternative.

          Section 7.18 Amendment.

          This Agreement may be altered, amended or changed only by a writing
     making specific reference to this Agreement and signed by duly authorized
     representatives of each party.

                                       44

<PAGE>

          IN WITNESS WHEREOF, Seller and Buyer, by their duly authorized
     officers, have executed this Agreement as of the date first written above.

                                        CMS ENTERPRISES COMPANY

                                        By: /s/ Thomas W. Elward
                                            ------------------------------------
                                            Thomas W. Elward
                                        Title: President and Chief Operating
                                               Officer

                                        CMS ENERGY INVESTMENT LLC

                                        By: /s/ Thomas W. Elward
                                            ------------------------------------
                                            Thomas W. Elward
                                        Title: President and Chief Executive
                                               Officer

                                        (Collectively, the Seller)

                                        LUCID ENERGY, L.L.C.

                                        By: /s/ Rai Bhargava
                                            ------------------------------------
                                        Name: Rai Bhargava
                                        Title: Chairman & CEO

                                        MICHIGAN PIPELINE AND PROCESSING, LLC

                                        By: /s/ Rai Bhargava
                                            ------------------------------------
                                        Name: :Rai Bhargava
                                        Title: Chairman & CEO

                                        (Collectively, the Buyer)

                                       45

<PAGE>

                                     ANNEX I
                          ENTITIES AND EQUITY INTERESTS

<TABLE>
<CAPTION>
ENTITY NAME                            % OWNERSHIP INTEREST
-----------                  ---------------------------------------
<S>                          <C>
CMS Antrim Gas LLC           100% owned by CMS Energy Investment LLC
CMS Bay Area Pipeline, LLC   100% owned by CMS Energy Investment LLC
CMS Grands Lacs LLC          100% owned by CMS Energy Investment LLC
CMS Jackson LLC              100% owned by CMS Energy Investment LLC
CMS Litchfield LLC           100% owned by CMS Energy Investment LLC
Jackson Pipeline Company*
</TABLE>

*    CMS Jackson LLC's 75% ownership interest in the Jackson Pipeline Company
     general partnership will be transferred by virtue of the sale of the
     ownership of CMS Jackson LLC.

                                       46

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