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Exhibit 10.106    
  

 
 

THE MISSION GROUP
  
    AMENDED AND RESTATED TAX ALLOCATION AGREEMENT    
  

        This amendment is entered into as of September 10, 1996 for the purpose of amending and restating the Tax Allocation Agreement dated November 1,
1987 and restated May 1, 1995 (as so amended and restated, being referred to herein as this "Agreement"), by and between The Mission Group, a California corporation ("Mission Group"), and its
wholly-owned subsidiaries, Edison Capital, Edison EV, Edison Mission Energy, Edison Source, Edison Spectrum and Mission Land Company (the "First Tier Subsidiaries"). 

RECITALS  

	A.
	Edison
International, a California corporation, which is the corporate parent of Mission Group, has entered into an Amended and Restated Agreement for the Allocation of Income Tax
Liabilities and Benefits (the "Master Agreement") dated as of September 10, 1996, with Southern California Edison Company ("SCE") and Mission Group providing, among other things, for an
equitable allocation among Edison International ("Parent"), SCE and Mission Group of tax benefits and tax liabilities reflected in or resulting from the filing of consolidated or combined income or
franchise tax returns.

	B.
	Pursuant
to the Master Agreement, Mission Group makes payments to and receives payments from Parent from time to time reflecting tax liabilities and benefits realized by the corporate
group arising from net operating income and losses, net capital gains and losses, and credits against tax, attributable
to Mission Group and the First Tier Subsidiaries and their respective subsidiaries (collectively, the "Subsidiaries").

	C.
	The
parties desire to provide for the continued payment by Mission Group to each of the First Tier Subsidiaries or from each of the First Tier Subsidiaries to Mission Group, as the
case may be, of the respective Separate Tax Benefit or Separate Tax Liability of each of the Subsidiaries, calculated in accordance with the Master Agreement. Terms used and not defined herein have
the meanings given them in the Master Agreement. 

AGREEMENT  

        NOW, THEREFORE, in consideration of the premises and of the mutual covenants herein contained and for other good and valuable consideration, the receipt of which
is hereby acknowledged, the parties hereto agree that this Agreement is amended in its entirety to read as provided in the heading and recitals hereto, as provided in this paragraph, and as follows: 

        1.    Tax Liability and Benefit Payments.    For each taxable period to which the Master Agreement is applicable,
Mission Group shall utilize the calculation made by Parent under the Master Agreement of the amount of the Separate Tax Liability or Separate Tax Benefit (as such terms are defined in the Master
Agreement) of each of the Subsidiaries. On each date that any payment under the Master Agreement is to be made or received by Mission Group (or would have been made or received if an amount had been
owed or receivable), (a) Edison Capital shall pay to Mission Group an amount equal to the aggregate of the Separate Tax Liabilities of Edison Capital and of each Subsidiary which is owned
directly or indirectly by Edison Capital for such taxable period (without deducting, with respect to any such member, the amount of any Separate Tax Benefit of any other member) and (b) Mission
Group shall pay to Edison Capital an amount equal to the aggregate of the Separate Tax Benefits of Edison Capital and of each Subsidiary which is owned directly or indirectly by Edison Capital
(without deducting, with respect to any such member, the amount of any Separate Tax Liability of any other member). 

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On
each date that any payment under the Master Agreement is to be made or received by Mission Group (or would have been made or received if an amount had been owed or receivable), each of the First
Tier Subsidiaries (other than Edison Capital) shall pay to Mission Group the amount by which (a) the aggregate of the Separate Tax Liability of such First Tier Subsidiary, if it has a Separate
Tax Liability, and the Separate Tax Liabilities of each of the Subsidiaries which is owned directly or indirectly by such First Tier Subsidiary ("Lower Tier Subsidiaries") and which has a Separate Tax
Liability, exceeds (b) the aggregate of the Separate Tax Benefit of such First Tier Subsidiary, if it has a Separate Tax Benefit, and the Separate Tax Benefits of each of its Lower Tier
Subsidiaries which has a Separate Tax Benefit. If, for any such taxable period, (a) the aggregate of the Separate Tax Benefit of a
First Tier Subsidiary (other than Edison Capital), if it has a Separate Tax Benefit, and the Separate Tax Benefits of each of its Lower Tier Subsidiaries which has a Separate Tax Benefit exceeds
(b) the aggregate of the Separate Tax Liability of such First Tier Subsidiary, if has a Separate Tax Liability, and the Separate Tax Liabilities of each of its Lower Tier Subsidiaries which has
a Separate Tax Liability, Mission Group shall pay to such First Tier Subsidiary an amount equal to such excess. 

All
payments either by Mission Group or by any First Tier Subsidiary shall be made without setoff, counterclaim or deduction of any kind whatsoever, and whether or not payment is due or has been
received from Parent under the Master Agreement. Mission Group shall give notice to each of the First Tier Subsidiaries immediately after receipt of each invoice described in Section 4 of the
Master Agreement, which notice shall state the date and amount of each payment to be made by Mission Group or the First Tier Subsidiary, as the case may be. Each of the First Tier Subsidiaries shall
provide (or cause to be provided) to Parent on a monthly basis, or upon demand as necessary, all relevant information necessary to calculate federal and state tax liabilities and payments for itself
and its Subsidiaries. 

        2.    Reconciliation of Tax Liability.    Upon receipt of each invoice provided for in Section 5 of the Master
Agreement, relating to reconciliation of quarterly estimated tax payments against the Consolidated Returns, Mission Group shall forthwith determine and notify each of the First Tier Subsidiaries of
the effect, if any, of such reconciliation on the payments made to or received from such First Tier Subsidiary. Each First Tier Subsidiary shall pay to Mission Group any additional tax liability due,
or receive payment from Mission Group for any overpayment, on the same date that Mission Group makes or receives any payments under Section 5 of the Master Agreement. 

        3.    Adjustments to Tax Liability.    If any adjustments are made to the income, gains, losses, deductions or credits
pertaining to the Subsidiaries, as reported in a Consolidated Return filed by Parent, by reason of the filing of an amended return or claim for refund, or arising out of an audit of such Consolidated
Return by the Internal Revenue Service or applicable state agency, then the Separate Tax Liability or the Separate Tax Benefit of the Subsidiaries shall be redetermined to give effect to any such
adjustment as if it had been made as part of the filed Consolidated Return. If any interest or penalty is to be paid or interest received as a result of a tax deficiency or refund, such interest or
penalty shall be allocated in accordance with the item(s) giving rise to such interest or penalty. Mission Group agrees to exercise its contest rights under the Master Agreement on behalf of any First
Tier Subsidiary and the reasonable costs so incurred by Mission Group shall be allocated upon such basis as is mutually agreed to by Mission Group and such First Tier Subsidiary in advance of such
contest. If, as a result of such redetermination, any amounts due to Mission Group or any of the First Tier Subsidiaries under this Agreement, as the case may be, shall exceed the amounts previously
paid to such party, then payment of such excess shall be made by the appropriate party, as the case may be, on the earliest date on which (i) Parent shall pay, or be deemed to have paid, any
additional taxes resulting from any such adjustment; (ii) Parent shall receive, or be deemed to have received, a refund of taxes resulting from any such adjustment; or (iii) such
adjustment shall become final; any payment between Mission Group and any of the First Tier Subsidiaries pursuant to (i) or (ii) above, however, shall not become final until the
adjustment with respect to which the redetermination was 

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made becomes final. For purposes of this Section 3, an adjustment shall become final at the time of the expiration of the applicable statute of limitations with respect to the taxable period
to which such
adjustment relates, or, if such adjustment was made pursuant to a decision of a court, at the time such decision shall become final. 

        4.    Carryovers and Carrybacks.    If, for any taxable period ending on or after December 31, 1986, any of the
Subsidiaries have Net Losses which, under the applicable tax codes may be carried over or carried back to any taxable period in which Parent filed, or reasonably anticipates that it will file, a
Consolidated Return which includes such Subsidiary, and such Net Losses give rise to a reduction in the tax liability of the Consolidated Group that would not have arisen if such Subsidiary were
excluded from the Consolidated Group for any such taxable period, Mission Group shall pay to the applicable First Tier Subsidiary an amount equal to the actual reduction in the tax liability of the
Consolidated Group for the taxable period to which such Net Losses may be carried, which is attributable to such carryover or carryback. Payment of such amount shall be made by Mission Group
(i) in the case of a carryover, on or before the later of (a) the 15th day of the third month after the end of the taxable period with respect to which the tax liability of the
Consolidated Group was reduced and (b) the date on which such reduction in tax liability is finally determined, which shall be not later than 90 days after the Consolidated Return for
such taxable period is filed; and (ii) in the case of a carryback, when the Consolidated Group shall receive, or be deemed to receive, the refund attributable to such carryback. 

        5.    Priority of Tax Benefits.    Notwithstanding anything to the contrary in this Agreement or the Master Agreement,
payment by Mission Group to the First Tier Subsidiaries for Separate Tax Benefits shall be made (i) first to Edison Capital for any Separate Tax Benefits of Edison Capital and its Lower Tier
Subsidiaries and (ii) then to each of the other First Tier Subsidiaries in the ratio that the Separate Tax Benefits of each of the other First Tier Subsidiaries and its Lower Tier Subsidiaries
bears to the total of the aggregate Separate Tax Benefits of all Subsidiaries. 

        6.    Termination.    Except with respect to Edison Capital, this Agreement may be terminated or modified by Mission
Group with respect to any tax year and all subsequent tax years by written notice given to the First Tier Subsidiaries prior to the first day of the first tax year with respect to which such
termination is to be effective. With respect to Edison Capital, this Agreement shall not be terminated or modified to the detriment of Edison Capital and its Lower Tier Subsidiaries as long as the
Edison Funding Company Revolving Credit Agreement dated as of June 13, 1995 (or a successor agreement) is in effect or there are notes outstanding under the Edison Funding Company
Medium-Term Notes, Series A. Any termination shall not relieve any party of any obligation arising under this Agreement with respect to any tax year commencing prior to the giving
of such notice. 

        7.    Successors and Beneficiaries.    This Agreement may not be assigned, pledged, transferred or hypothecated by any
of the Subsidiaries without the express written consent of Mission Group. This Agreement may be assigned to or assumed by any successor in interest of Mission Group or any person to whom all the
common stock of the Subsidiaries is transferred. The parties acknowledge that Parent became the parent holding company of SCE and Mission Group effective July 1, 1988, at which time Parent
entered into the Master Agreement and assumed SCE's obligations to Mission Group under a prior agreement for the allocation of income tax liabilities and benefits, as provided in Section 8.6 of
the Master Agreement. References in this Agreement to "Parent" shall be deemed to refer to SCE with respect to periods prior to July 1, 1988. 

        8.    Governing Law.    This Agreement shall be governed by and construed in accordance with the laws of the State of
California. 

        9.    Additional First Tier Subsidiaries.    Any other wholly-owned first tier Mission Group subsidiary may be added
to this Agreement as a First Tier Subsidiary at any time by addendum executed by Mission Group and the subsidiary. The addendum must provide such subsidiary will be bound by the 

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terms of the Agreement. Mission Group shall provide a copy of the addendum to all other First Tier Subsidiaries. 

        IN
WITNESS WHEREOF, the parties have executed this Agreement by their respective officers thereunto duly authorized as of the date first above written. 

	
THE MISSION GROUP	
 	

EDISON CAPITAL
	

By:	
 	

/s/  THOMAS R. MCDANIEL      
 Thomas R. McDaniel	
 	

By:	
 	

/s/  THOMAS R. MCDANIEL      
 Thomas R. McDaniel
	
EDISON EV	
 	

EDISON MISSION ENERGY
	

By:	
 	

/s/  DIANE O. WITTENBERG      
 Diane O. Wittenberg	
 	

By:	
 	

/s/  EDWARD R. MULLER      
 Edward R. Muller
	
EDISON SOURCE	
 	

EDISON SPECTRUM
	

By:	
 	

/s/  C. ALEX MILLER      
 C. Alex Miller	
 	

By:	
 	

/s/  C. ALEX MILLER      
 C. Alex Miller
	
MISSION LAND COMPANY	
 	

 	
 	

 
	

By:	
 	

/s/  THOMAS R. MCDANIEL      
 Thomas R. McDaniel	
 	

 	
 	

 

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ADDENDUM A TO
  
    THE MISSION GROUP
  
    AMENDED AND RESTATED TAX ALLOCATION AGREEMENT    
  

        This Addendum A to The Mission Group Amended and Restated Tax Allocation Agreement dated September 10, 1996 (the "Mission Group Agreement"), is effective
April 30, 1998. 

RECITALS  

        WHEREAS, Edison International, a California corporation, which is the corporate parent of The Mission Group ("Mission Group"), has entered into an Amended and
Restated Agreement for the Allocation of Income Tax Liabilities and Benefits (the "Master Agreement") dated as of September 10, 1996, with Southern California Edison Company ("SCE") and Mission
Group providing, among other things, for an equitable allocation among Edison International ("Parent"), SCE and Mission Group of tax benefits and tax liabilities reflected in or resulting from the
filing of consolidated or combined income or franchise tax returns; 

        WHEREAS,
pursuant to the Master Agreement, Mission Group makes payments to and receives payments from Parent from time to time reflecting tax liabilities and benefits realized by the
corporate group arising from net operating income and losses, net capital gains and losses, and credits against tax, attributable to Mission Group, its first tier subsidiaries (the "First Tier
Subsidiaries") and their respective subsidiaries (collectively, the "Subsidiaries"); 

        WHEREAS,
the Mission Group Agreement provides for the continued payment by Mission Group to each of the First Tier Subsidiaries or from each of the First Tier Subsidiaries to Mission
Group, as the case may be, of the respective Separate Tax Benefit or Separate Tax Liability of each of the Subsidiaries, calculated in accordance with the Master Agreement; 

        WHEREAS,
the Mission Group Agreement provides that any other wholly-owned first tier subsidiary of Mission Group may be added to the Mission Group Agreement as a First Tier Subsidiary at
any time by addendum executed by Mission Group and the first tier subsidiary; 

        WHEREAS,
Edison Enterprises has been incorporated as a first tier subsidiary of Mission Group and as the parent of Edison EV, Edison Source and Edison Select (successor to Edison
Spectrum) so they are no longer first tier subsidiaries of Mission Group; 

        WHEREAS,
it is deemed appropriate for Edison Enterprises to be substituted in place of its subsidiaries under the Mission Group Agreement; 

        NOW,
THEREFORE, the parties executing this Addendum A agree to the substitution of Edison Enterprises under the Mission Group Agreement in place of Edison EV, Edison Source and Edison
Select, and Edison Enterprises hereby agrees to be bound by the terms and conditions of the Mission Group Agreement. 

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        IN
WITNESS WHEREOF, the parties have executed this Addendum A by their respective officers thereunto duly authorized as of the effective date written above. 

	
THE MISSION GROUP	
 	

EDISON ENTERPRISES
	

By:	
 	

/s/  ALAN J. FOHRER      
 Alan J. Fohrer	
 	

By:	
 	

/s/  STEVEN E. PAZIAN      
 Steven E. Pazian
	
EDISON EV	
 	

EDISON SOURCE
	

By:	
 	

/s/  STEVEN E. PAZIAN      
 Steven E. Pazian	
 	

By:	
 	

/s/  STEVEN E. PAZIAN      
 Steven E. Pazian
	
EDISON SELECT (SUCCESSOR TO

EDISON SPECTRUM)	
 	

 	
 	

 
	

By:	
 	

/s/  STEVEN E. PAZIAN      
 Steven E. Pazian	
 	

 	
 	

 

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ADDENDUM B TO
  
    THE MISSION GROUP
  
    AMENDED AND RESTATED TAX ALLOCATION AGREEMENT    
  

        This Addendum B to The Mission Group Amended and Restated Tax Allocation Agreement, dated as of September 10, 1996 (the "Mission Group Agreement"), is
effective July 2, 2001. 

RECITALS  

        WHEREAS, Edison International, a California corporation, which is the corporate parent of The Mission Group ("Mission Group"), has entered into an Amended and
Restated Agreement for the Allocation of Income Tax Liabilities and Benefits (the "Master Agreement"), dated as of September 10, 1996, with Southern California Edison Company ("SCE") and
Mission Group providing, among other things, for an equitable allocation among Edison International ("Parent"), SCE and Mission Group of tax benefits and tax liabilities reflected in or resulting from
the filing of consolidated or combined income or franchise tax returns (capitalized terms not otherwise defined herein have the meanings given them in the Master Agreement); 

        WHEREAS,
pursuant to the Master Agreement, Mission Group makes payments to and receives payments from Parent from time to time reflecting tax liabilities and benefits realized by the
corporate group arising from net operating income and losses, net capital gains and losses, and credits against tax, attributable to Mission Group, its first tier subsidiaries (the "First Tier
Subsidiaries") and their respective subsidiaries (collectively, the "Subsidiaries"); 

        WHEREAS,
the Mission Group Agreement provides for the continued payment by Mission Group to each of the First Tier Subsidiaries or from each of the First Tier Subsidiaries to Mission
Group, as the case may be, of the respective Separate Tax Benefit or Separate Tax Liability of each of the Subsidiaries, calculated in accordance with the Master Agreement; 

        WHEREAS,
the Mission Group Agreement provides that any other wholly-owned first tier subsidiary of Mission Group may be added to the Mission Group Agreement as a First Tier Subsidiary at
any time by addendum executed by Mission Group and the first tier subsidiary; 

        WHEREAS,
Mission Energy Holding Company has been incorporated and Mission Group has contributed all of the capital stock of Edison Mission Energy to Mission Energy Holding Company in
exchange for all the capital stock of Mission Energy Holding Company, so that Mission Energy Holding Company has become a first tier subsidiary of Mission Group and Edison Mission Energy is no longer
a first tier subsidiary of Mission Group; and 

        WHEREAS,
it is deemed appropriate for Mission Energy Holding Company to be substituted in place of Edison Mission Energy in the Mission Group Agreement; 

AGREEMENT  

        NOW, THEREFORE, the parties executing this Addendum B hereby agree that (a) Mission Energy Holding Company shall be substituted under the Mission Group
Agreement in place of Edison Mission Energy as a First Tier Subsidiary, (b) Mission Energy Holding Company shall be bound by the terms and conditions of the Mission Group Agreement as a First
Tier Subsidiary, and (c) Edison Mission Energy shall be a Subsidiary for purposes of the Mission Group Agreement. 

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        IN
WITNESS WHEREOF, the parties have executed this Addendum B by their respective officers thereunto duly authorized as of the effective date written above. 

	
THE MISSION GROUP	
 	

EDISON MISSION ENERGY
	

By:	
 	

/s/  THEODORE F. CRAVER, JR.      
 Theodore F. Craver, Jr.	
 	

By:	
 	

/s/  JOHN E. BRYSON      
 John E. Bryson
	
MISSION ENERGY HOLDING COMPANY	
 	

 	
 	

 
	

By:	
 	

/s/  THEODORE F. CRAVER, JR.      
 Theodore F. Craver, Jr.	
 	

 	
 	

 

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ADDENDUM C TO
  
    THE MISSION GROUP
  
    AMENDED AND RESTATED TAX ALLOCATION AGREEMENT    
  

        This Addendum C to The Mission Group Amended and Restated Tax Allocation Agreement, dated as of September 10, 1996 (the "Mission Group Agreement"), is
effective July 2, 2001. 

RECITALS  

        WHEREAS, Edison International, a California corporation, which is the corporate parent of The Mission Group ("Mission Group"), has entered into an Amended and
Restated Agreement for the Allocation of Income Tax Liabilities and Benefits (the "Master Agreement"), dated as of September 10, 1996, with Southern California Edison Company ("SCE") and
Mission Group providing, among other things, for an equitable allocation among Edison International ("Parent"), SCE and Mission Group of tax benefits and tax liabilities reflected in or resulting from
the filing of consolidated or combined income or franchise tax returns (capitalized terms not otherwise defined herein have the meanings given them in the Master Agreement); 

        WHEREAS,
pursuant to the Master Agreement, Mission Group makes payments to and receives payments from Parent from time to time reflecting tax liabilities and benefits realized by the
corporate group arising from net operating income and losses, net capital gains and losses, and credits against tax, attributable to Mission Group, its first tier subsidiaries (the "First Tier
Subsidiaries") and their respective subsidiaries (collectively, the "Subsidiaries"); 

        WHEREAS,
the Mission Group Agreement provides for the continued payment by Mission Group to each of the First Tier Subsidiaries or from each of the First Tier Subsidiaries to Mission
Group, as the case may be, of the respective Separate Tax Benefit or Separate Tax Liability of each of the Subsidiaries, calculated in accordance with the Master Agreement; 

        WHEREAS,
the Mission Group Agreement provides that any other wholly-owned first tier subsidiary of Mission Group may be added to the Mission Group Agreement as a First Tier Subsidiary at
any time by addendum executed by Mission Group and the first tier subsidiary; and 

        WHEREAS,
Edison O&M Services has been incorporated as a wholly-owned first tier subsidiary of Mission Group and it is deemed appropriate that Edison O&M Services be added to the Mission
Group Agreement; 

AGREEMENT  

        NOW, THEREFORE, the parties executing this Addendum C hereby agree that (a) Edison O&M Services is added to the Mission Group Agreement as a First Tier
Subsidiary, and (b) Edison O&M Services shall be bound by the terms and conditions of the Mission Group Agreement as a First Tier Subsidiary. 

        IN
WITNESS WHEREOF, the parties have executed this Addendum C by their respective officers thereunto duly authorized as of the effective date written above. 

	
THE MISSION GROUP	
 	

EDISON O&M SERVICES
	

By:	
 	

/s/  THEODORE F. CRAVER, JR.      
 Theodore F. Craver, Jr.	
 	

By:	
 	

/s/  WESLEY C. MOODY      
 Wesley C. Moody

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QuickLinks

Exhibit 10.106

THE MISSION GROUP AMENDED AND RESTATED TAX ALLOCATION AGREEMENT

ADDENDUM A TO THE MISSION GROUP AMENDED AND RESTATED TAX ALLOCATION AGREEMENT

ADDENDUM B TO THE MISSION GROUP AMENDED AND RESTATED TAX ALLOCATION AGREEMENT

ADDENDUM C TO THE MISSION GROUP AMENDED AND RESTATED TAX ALLOCATION AGREEMENTQuickLinks
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Exhibit 10.25    
  

 
 

EDISON MISSION MIDWEST HOLDINGS AND SUBSIDIARIES
  "MIDWEST"
  TAX ALLOCATION AGREEMENT    
  

        This TAX ALLOCATION AGREEMENT (this "Agreement") is made and entered into as of January 1, 2002, by and among Edison Mission Midwest Holdings Co., a
Delaware corporation ("EMMH"), Midwest Generation, LLC, a Delaware limited liability company ("MWG"), and Edison Mission Overseas Co., a Delaware corporation ("EMO") (collectively, EMMH, MWG and EMO
are referred to as the "Midwest Subgroup," and individually referred to as "Subgroup Members"). 

RECITALS  

	A.
	The
parties are each indirect subsidiaries of Edison Mission Energy, a Delaware corporation ("EME") and an indirect wholly-owned subsidiary of Edison International ("EIX").

	B.
	The
parties desire to provide for and confirm current practices for the allocation, cash settlement and accounting of consolidated and combined federal and state income tax liabilities
among the parties comprising the Midwest Subgroup.

	C.
	The
parties desire to have this Agreement address the computation of all tax liabilities due and owing among the Subgroup Members after the date of this Agreement with regard to
taxable periods beginning on or after January 1, 2002, as well as for computations for prior taxable periods.

	D.
	It
is the intent of EME to add Subgroup Members in the future as necessary in response to changing business needs, which may be done by adding signature pages as an addendum to this
Agreement.

	E.
	This
Agreement shall not affect the nonconsolidated tax liabilities of any Subgroup Member, which shall remain the separate obligation of each subsidiary. 

AGREEMENT  

        NOW, THEREFORE, in consideration of the promises and of the mutual covenants herein contained and for other good and valuable consideration, the receipt of which
is hereby acknowledged, the parties hereto agree as follows: 

        1.    Tax Liability Allocation and Computation.    

        a.    Federal Income Taxes.    For each taxable period to which this Agreement is applicable,
the consolidated federal income liability of the Midwest Subgroup will be allocated to each Subgroup Member, consistent with the method and principles of tax allocation described in Treas. Reg. sec.
1.1552-1(a)(2) ("Separate Return Method"), as modified in the manner described in Treas. Reg. sec. 1.1502-33(d)(2)(i) ("Wait and See Method"). Each Subgroup Member's
allocated portion of the federal or state income tax liability as computed under Sections 1a. and 1b. shall be referred to as the federal or state tax "Separate Liability" of such Subgroup Member. The
Subgroup Members shall only be allocated tax benefits (from, but not limited to, losses, credits or state apportionment) at the time and in the amount that each Subgroup Member could have used the tax
benefit had it filed a separate return (consistent with the principles of the Wait and See Method). Each Subgroup Member's federal or state income allocated tax benefit as computed under these
Sections 1a. and 1b. shall be referred to as the federal or state tax "Separate Benefit" of such member of the Midwest Subgroup. In no event shall any Subgroup Member be entitled to any cash payment
for federal or state income tax benefits under this Agreement. 

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        b.    State Combined or Consolidated Taxes.    The same principles used in Section 1a.
above for federal income taxes shall be used to compute state income tax allocations and liabilities for the Subgroup Members with respect to any combined or consolidated state income return that the
Midwest Subgroup is included into with its Parent, except that the Separate Liability or Separate Benefit allocation shall be computed using the long term state income tax apportionment factors of the
EIX consolidated tax group, and EME's determination of such factor shall be conclusive. Nothing in this Agreement shall change the sole responsibility of each Subgroup Member for its state income tax
liabilities and returns
for separate income taxes required to be computed on a nonconsolidated, noncombined basis. Any state tax liability or benefit not allocable to a specific Subgroup Member under this Section 1b.
shall be allocated to EMMH. 

        c.    Providing Information.    The Subgroup Members shall provide to EME on a monthly basis,
or upon demand by EME as necessary, all relevant information necessary to calculate their federal and state tax liabilities and payments for EME and subsidiaries and the Separate Liability or Separate
Benefit of the Subgroup Members. 

        2.    Payments.    

        a.    In General.    For each taxable period for which this Agreement is applicable, federal
income tax or state combined or consolidated income tax liabilities will be allocated at least quarterly in the manner outlined in Section 1 above. Payments of federal or state tax liabilities
by each Subgroup Member shall be made of its allocated portion of the Midwest Subgroup tax liability as computed under Section 1 above, net of any Separate Benefits computed under
Section 2b. below for such Subgroup, either by legal offset of intercompany accounts or by payment in cash upon demand by EMMH, at the dates payment is due under that certain Edison Mission
Energy and Subsidiaries Tax Allocation Agreement, dated as of even date herewith (the "EME and Subsidiaries Tax Allocation Agreement"), provided that such payments are consistent with and are not
limited by debt financing restrictions and covenants. 

        b.    Assignment of Separate Benefits.    For each taxable period for which this Agreement is
applicable, but not less than on an annual basis, any allocated Separate Benefit, or rights to a future Separate Benefit under Section 1a. shall be assigned, distributed or transferred by one
Subgroup Member to another in payment of interest or principal on intercompany subordinated debt, whether or not the Separate Benefit is currently payable or allocable under the "Wait and See" method
described in Section 1a. above. Such transactions may be undertaken as necessary to facilitate the legal offsetting of intercompany payables or receivables for efficient administration of tax
and financial accounting. 

        c.    Netting of Intercompany Tax Payables/Receivables.    From time to time, but not less
than on an annual basis, any Separate Liability or Separate Benefit payable or receivable arising under this Agreement currently due, recognized and owed within the Midwest Subgroup among Subgroup
Members shall be legally offset against one other, or against other intercompany payables or receivables, to facilitate the efficient administration of tax and financial accounting. Separate Benefits
may be offset against Separate Liabilities whether or not the Separate Benefit is currently payable or allocable under the "Wait and See" method described in Section 1a. above. 

        3.    Reconciliation of Tax Liability.    The Subgroup Members shall be allocated, and pay either by legal offset of
intercompany accounts or by payment in cash upon demand by EMMH under terms described in Section 2, any additional Separate Liability due, or receive credit against allocated Separate
Liabilities for any overpayment, on the same date that EMMH makes or receives any payments under Section 2 of the Edison Mission Energy Subgroup Tax Allocation Agreement, dated as of even date
herewith,
provided that any such payments are consistent with and are not limited by debt financing restrictions and covenants. 

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        4.    Adjustments to Tax Liability.    If any adjustments are made to the income, gains, losses, deductions or credits
pertaining to EME or any of its subsidiaries, as reported in a federal or state combined/consolidated income tax return filed by EIX, by reason of the filing of an amended return or claim for refund,
or arising out of an audit of such consolidated return by the Internal Revenue Service or applicable state agency, then the tax Separate Liability of the Subgroup Members shall be redetermined to give
effect to any such adjustment as if it had been made as part of the filed combined or consolidated return. If there are carrybacks or carryforwards of net operating losses that reduce the tax due,
they shall be allocated against tax liability among the Subgroup Members consistent with the principles of Section 1 above. If any interest or penalty is to be paid or interest received as a
result of a tax deficiency or refund, such interest or penalty shall be allocated in accordance with the item(s) giving rise to such interest or penalty. If, as a result of such redetermination, any
amounts due from the Subgroup Members, as the case may be, exceed the amounts previously paid by such party, then payment of such excess shall be made by the appropriate party, upon demand by EMMH, on
the earliest date on which (i) EIX shall pay, or be deemed to have paid, any additional taxes resulting from any such adjustment; (ii) EIX shall receive, or be deemed to have received, a
refund of taxes resulting from any such adjustment; or (iii) such adjustment shall become final. Any payment among the Subgroup Members pursuant to (i) or (ii) above, however,
shall not become final until the adjustment with respect to which the redetermination was made becomes final. For purposes of this Section 4, an adjustment shall become final at the time of the
expiration of the applicable statute of limitations with respect to the taxable period to which such adjustment relates, or, if such adjustment was made pursuant to a decision of a court, at the time
such decision shall become final. Notwithstanding the foregoing, payment shall only be made to EMMH provided that such payments are consistent with and are not limited by debt financing restrictions
and covenants. 

        5.    Termination.    This Agreement may be terminated or modified by EMMH in its sole discretion in accordance with
its terms. Should the EME and Subsidiaries Tax Allocation Agreement be terminated or modified, this Agreement may be terminated or deemed to be similarly modified, as the case may be, as of the same
effective date, in the discretion of EMMH. 

        6.    Successors and Beneficiaries.    This Agreement may not be assigned, pledged, transferred or hypothecated by the
Midwest Subgroup or any of its members, without the express, written consent of EMMH. 

        7.    Counterparts.    This Agreement may be executed in one or more counterparts, each of which shall be an original
and all of which taken together shall constitute one and the same agreement. 

        8.    Governing Law.    This Agreement shall be governed by and construed in accordance with the laws of the State of
Delaware. 

3

 

        IN
WITNESS WHEREOF, the parties have executed this Agreement by their respective officers thereunto duly authorized as of the date first above written. 

	 	 	EDISON MISSION MIDWEST HOLDINGS CO.
	

 	
 	

By	

/s/  JOHN P. FINNERAN, JR.      

	

 	
 	
EDISON MISSION OVERSEAS CO.
	

 	
 	

By	

/s/  JOHN K. DESHONG      

	

 	
 	
MIDWEST GENERATION, LLC
	

 	
 	

By	

/s/  STEVEN D. EISENBERG      

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Exhibit 10.25

EDISON MISSION MIDWEST HOLDINGS AND SUBSIDIARIES "MIDWEST" TAX ALLOCATION AGREEMENT

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