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Exhibit 10.7

AMENDED AND RESTATED TAX SHARING AGREEMENT

        This Amended and Restated Tax Sharing Agreement (the "Agreement") is
made as of this 1st day of January 1991, by, between and among Zenith National
Insurance Corp. ("Zenith National") and its subsidiaries Zenith Insurance
Company, CalRehab Services, Inc. (formerly ZNAT Rehabilitation Services, Inc.),
CalFarm Insurance Company, CalFarm Insurance Agency, Cal-Ag Insurance
Services, Inc., CalFarm Annuity Services Company, ZNAT Insurance Company and
CalFarm Life Insurance Company (the "Existing Subsidiaries").

        WHEREAS, Zenith National ("Parent") is the common parent of an
affiliated group of corporations, as defined in section 1504(a) of the Internal
Revenue Code of 1986, as amended (the "Code"), of which the Existing
Subsidiaries are members; and

        WHEREAS, Parent, on behalf of its affiliated group, has filed for
previous taxable years consolidated federal income tax returns in accordance
with section 1501 of the Code and is required to file consolidated federal
income tax returns for subsequent taxable years; and

        WHEREAS, the parties wish to provide for the allocation among them of
consolidated federal income tax liability and certain related matters; and

        WHEREAS, the parties except for CalFarm Life Insurance Company have been
parties to a Tax Sharing Agreement, dated as of January 1, 1986 the ("Original
Tax Sharing Agreement"); and

        WHEREAS, CalFarm Life Insurance Company is permitted to join in the
consolidated federal income tax return filed by Parent for taxable years
beginning on or after January 1, 1991; and

        WHEREAS, the parties wish to have CalFarm Life Insurance Company join in
the Tax Sharing Agreement and wish to amend the Original Tax Sharing Agreement
to provide for the compensation of Members for the use of their tax benefits by
the Group to reduce the Group Tax Liability and to provide a more expedient
mechanism for new Members to become parties to the Tax Sharing Agreement;

        NOW, THEREFORE, in consideration of the foregoing premises and of the
mutual covenants and agreements contained herein, the parties agree as follows:

1.DEFINITIONS.

        For purposes of this Agreement, the terms set forth below shall be
defined as follows:

        (a)  "Group" shall mean Parent (as hereinafter defined), the Existing
Subsidiaries, and all other corporations (whether now existing or hereafter
formed or acquired) that are required to join with Parent in filing a
consolidated federal income tax return.

        (b)  "Group Tax Liability" shall mean the consolidated federal income
tax liability of the Group reported on the Group's consolidated federal income
tax return filed for the taxable year.

        (c)  "Hypothetical Basis." Whenever, in this Agreement, a computation is
to be made on a Hypothetical Basis, it shall be made on a pro forma basis, as if
the Subsidiary filed a separate federal income tax return for each taxable
period, based upon any assumptions stated in the respective provision.

        (d)  "Member" shall mean any corporation that is included in the Group,
or any successor to such corporation.

        (e)  "Parent" shall mean (i) Zenith National, (ii) any successor common
parent corporation described in Treas. Reg. §1.1502-75(d)(2)(i) or (ii), or
(iii) any corporation as to which Parent (or a successor corporation described
in clause (ii) hereof) is the "predecessor" within the meaning of Treas. Reg.
§1.1502-1(f)(1), if such corporation acquires Zenith National (or a successor
corporation described in clause (ii) hereof) in a "reverse acquisition" within
the meaning of Treas. Reg. §1.1502-75(d)(3).

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        (f)    "Separate Tax Benefit" of a Subsidiary shall mean the amount by
which the Group Tax Liability was reduced as a result of a tax credit or of a
Separate Taxable Loss or the carryforward or carryback of a Separate Taxable
Loss attributable to such Subsidiary. The amount of reduction of the Group Tax
Liability on the Group's consolidated return attributable to a Subsidiary shall
be computed by calculating the difference between (i) the Group Tax Liability
and (ii) the hypothetical Group Tax Liability computed by excluding the items of
income, deduction, loss and credit attributable to the Subsidiary in question.
The ordering and allocation of the use of credits, net operating losses and
capital losses of Subsidiaries will be determined under the Code, the
regulations thereunder and the generally accepted procedures of tax accounting.
Notwithstanding the foregoing, the computation provided in clause (ii) above
will be made based only on the items included for purposes of making the
computation provided in clause (i) above; no additional losses or credits of
other Subsidiaries are to be considered in making the computation provided in
clause (ii).

        (g)  "Separate Tax Liability" of a Subsidiary shall mean an amount equal
to any tax computed as a flat tax at the highest marginal rate, without
exemptions, under each respective tax provision (including, without limitation,
that imposed under Sections 11, 55 and 1201(a) of the Code) with respect to the
Separate Taxable Income of such Subsidiary, reduced by current credits, if any,
against tax, allowable in respect of such Separate Taxable Income, without
giving effect to any otherwise allowable carryover or carryback of a Separate
Taxable Loss or credits (other than SRLY losses or credits) from any other
taxable year of such Subsidiary, all as computed on a Hypothetical Basis.

        (h)  "Separate Taxable Income" of a Subsidiary shall mean the amount of
taxable income of the Subsidiary for any period for which the Subsidiary has
positive taxable income (including, but not limited to, alternative minimum
taxable income), computed on a Hypothetical Basis pursuant to the method of
federal income tax accounting employed by each such Subsidiary.

        (i)    "Separate Taxable Loss" of the Subsidiary shall mean the amount
of any net operating loss or net capital loss of the Subsidiary for any period
pursuant to section 172 and section 1211 of the Code, respectively, computed
using the principles applicable to a determination of Separate Taxable Income.

        (j)    "Subsidiary" shall mean a corporation other than Parent which is
a Member of the Group.

2.FILING OF CONSOLIDATED RETURNS.

        (a)  Parent shall, on a timely basis, file or cause to be filed,
consolidated federal income tax returns and estimated tax returns for each
taxable year during the term of this Agreement and shall pay in full any tax
shown as due thereon. Each Member shall execute and file such consents,
elections, and other documentation as may be required or appropriate for the
proper filing of such returns. Each member shall also maintain such books and
records and provide such information as Parent may request in connection with
the matters contemplated by this Agreement. The cost of preparing such tax
returns and estimated tax returns shall be borne by each member in the manner
set forth in the Cost Allocation Agreement, dated December 31, 1990, as may be
amended from time to time, entered into by certain parties that are members of
the Group.

        (b)  Parent shall have the right, in its sole discretion, to (i) make
any elections which are employed in the filing of such returns, including any
elections denominated as such in the Code and choice of methods of accounting
and depreciation; (ii) determine the manner in which such returns shall be
prepared and filed, including without limitation, the manner in which any item
of income, gain, loss, deduction or credit shall be reported; (iii) contest,
compromise or settle any adjustment or deficiency proposed, asserted or assessed
as a result of any audit of any such returns; (iv) file, prosecute, compromise
or settle any claim for refund; and (v) determine whether any refunds to which
the Group may be entitled shall be paid by way of refund or credit against the
federal income tax liability of the Group,

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3.PAYMENTS.

        For each taxable year of the Group with respect to which a consolidated
federal income tax return is filed, the Members of the Group shall make payments
to Parent in the following manner:

        (a)  Each Member shall pay to Parent the amount of such Member's
Separate Tax Liability not later than the later of (i) five (5) days after the
date on which Parent notifies such Member of its Separate Tax Liability and
(ii) five (5) days before the date on which the Group's consolidated federal
income tax return is required to be filed (taking account of any extensions
thereof).

        (b)  At the option of Parent, each Member shall pay to Parent, not later
than five (5) days before the date such Member would be required to make a
payment of estimated federal income taxes were such Member to file a separate
federal income tax return for the taxable year (including any payment due at the
time any extension of time for the filing of such hypothetical return is
obtained), an amount, as determined by Parent in a manner consistent with
paragraph l(g), equal to the portion of such Member's Separate Tax Liability
that would be due were such Member to file a separate federal income tax return
for the taxable year. Any payments made by a Member to Parent under this
subparagraph (b) with respect to a taxable year shall be applied to reduce the
amount, if any, owing by the Member under subparagraph (a) of this paragraph 3
with respect to such year. Any excess of such payments over the amount
determined under subparagraph (a) of this paragraph 3 for such year shall be
repaid by Parent to the Member not later than forty-five (45) days after the
date on which the Group's federal income tax return is filed or, to the extent
that such excess represents all or a part of a tax refund claimed by the Group,
not later than forty-five (45) days after the receipt of such refund.

        (c)  For taxable years of the Group beginning on or after the date of
this Agreement, Parent shall pay to each Subsidiary, by the date upon which the
Group's consolidated federal income tax return is filed, an amount equal to the
Separate Tax Benefit, if any, of the Subsidiary. No compensation shall be paid
by any Subsidiary to another Subsidiary for tax savings resulting from the
effective utilization by the first Subsidiary of (i) any net operating loss,
capital loss, investment tax credit, foreign tax credit, or other tax credit, or
(ii) a carryover of such loss or credit, of such other Subsidiary.

4.CHANGES IN TAX LIABILITY.

        (a)  If with respect to any taxable year (i) the Group files an amended
consolidated federal income tax return reporting a consolidated federal income
tax liability different from the Group Tax Liability, (ii) the Group Tax
Liability or any Member's tax liability is adjusted and such adjustment is part
of a final "determination" as that term is defined in section 1313(a) of the
Code, or (iii) the Group is assessed and pays federal income taxes in excess of
the Group Tax Liability by reason of any of the events specified in
section 6213(b) or (d) of the Code, then the amounts of the payments required
under paragraph 3 shall be recomputed, subject to the limitations of
subparagraph (c) of this paragraph 4, to give effect to such amended return,
adjustment or assessment, as the case may be. Each Member shall then pay to
Parent, or Parent shall then pay to each Member, as the case may be, any
difference between the amounts determined by such recomputation and the amounts
previously paid. Such payments shall be made no later than (i) where an
additional payment of tax by the Group is due as a result of such amended
return, adjustment or assessment, the later of (a) five (5) days before the date
on which such additional payment of tax is due and (b) five (5) days after the
date on which Parent notifies a Member of the amount of payment due from such
Member pursuant to this subparagraph (a); or (ii) where the Group receives a
refund arising from such amended return or adjustment, forty-five (45) days
after the receipt of such refund.

        (b)  If with respect to any taxable year the Group files an amended
consolidated federal income tax return reporting a consolidated federal income
tax liability identical to the Group Tax Liability, then the amounts of the
payments required under paragraph 3, subject to the limitations of subparagraph
(c) of this paragraph 4, shall be recomputed to give effect to such amended
return. Not later than

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forty-five (45) days after the filing of such amended return, each Member shall
pay to Parent, or Parent shall pay to each Member, as the case may be, any
difference between the amounts determined by such recomputation and the amounts
previously paid.

        (c)  The parties recognize that a recomputation under subparagraphs
(a) or (b) of this paragraph 4 of the amounts of the payments required under
paragraph 3 for any taxable year will not necessarily be the final determination
of the amounts of such payments for such year, and the amounts of such payments
may be recomputed more than once.

        (d)  In the event that a change in the tax liability of the Group
arising from an amended return, adjustment or assessment described in
subparagraph (a) of this paragraph 4 results or will result in the receipt or
payment of interest, or the payment or recovery of penalties in excess of the
aggregate interest or penalties included in determining the aggregate Separate
Tax Liability of all of the Members, such interest or penalties shall be
allocated to each Member as follows: The total amount of such excess interest or
penalty shall be multiplied by a fraction, the denominator of which is the
amount of the change in the Group Tax Liability on which the interest or penalty
is computed, and the numerator of which is the amount of the change in the
Member's, allocated tax liability, in both cases with respect to the most recent
prior computation of the Group Tax Liability and the Member's Separate Tax
Liability. Each Member shall pay to Parent, or Parent shall pay to each Member,
as the case may be, the excess interest or penalties allocated to each Member
pursuant to this subparagraph 4(d) at the same time the amounts payable pursuant
to subparagraph (a) of this paragraph 4 become payable.

        (e)  Except as provided in paragraph 6, payments made pursuant to
subparagraphs (a), (b), (c) or (d) of this paragraph 4 shall not themselves bear
interest.

5.INDEMNIFICATION.

        (a)  Each Subsidiary agrees to indemnify and hold harmless Parent with
respect to any liability for federal income taxes, including any interest
thereon, any additions to such taxes and assessable penalties imposed with
respect thereto (collectively "Taxes") to the extent that Parent's liability for
such Taxes is attributable to the failure of such Subsidiary to make the
payments required of it pursuant to paragraphs 3 and 4 of this Agreement or to
the failure of such Subsidiary to comply with subparagraph (a) of paragraph 2 of
this Agreement.

        (b)  Parent agrees to indemnify and hold harmless each Subsidiary with
respect to (i) any liability for Taxes attributable to any taxable period for
which such Subsidiary has paid Parent its Separate Tax Liability, if any, in
accordance with this Agreement (including any recomputations in accordance with
paragraph 4 hereof) and (ii) any liability for Taxes of the Group for a taxable
period where such liability arises solely by reason of any Subsidiary being
severally liable for any Taxes of the Group pursuant to Treas. Reg. §1.1502-6.

        (c)  Payment pursuant to the indemnity provided in this paragraph 5
shall be made within ten (10) days of notice that a payment requiring
indemnification under this paragraph 5 has been made by Parent or a Subsidiary.

6.DEFAULT INTEREST.

        Where payment required by this Agreement to be made from one party to
another is not made within the time provided, the amount not timely paid shall
bear interest at the rate established pursuant to section 6621(a)(2) of the
Code.

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7.TERMINATION OF AFFILIATION.

        (a)  In the event that a Member other than Parent ceases to be included
in the Group but continues to be a corporation subject to federal income tax (a
"Former Member"), this Agreement shall, except as provided in this paragraph 7,
terminate with respect to such Member.

        (b)  Parent and the Former Member shall consult and furnish each other
with information concerning the status of any tax audit or tax refund claim
relating to a taxable year in which the Former Member was a Member and a
consolidated federal income tax return was filed. Parent shall have the right to
make the final determination as to the response of the Group to any audit and
shall have the sole right to control, at its own expense, any contest of any
change proposed and any proposed disallowance of a refund claim by the Internal
Revenue Service through the Appeals Office of the Internal Revenue Service and
the courts in connection with any taxable year for which this Agreement is in
effect.

        (c)  The Former Member shall reimburse Parent to the extent that the
Former Member received a payment under this Agreement on account of (or payments
made by it under this Agreement were reduced by) any loss or credit that remains
an attribute of the Former Member (i.e., the loss or credit was not absorbed by
the Group in calculating the Group Tax Liability).

        (d)  Payments which would have been required under paragraphs 3 and 4 of
this Agreement to or by a Former Member, were the Former Member still a Member,
with respect to taxable years as to which the Former Member was a Member, shall
be so made in accordance with principles analogous to those set forth in such
paragraphs and at the times set forth therein; provided, however, that no such
payments shall be made on account of any loss or credit realized by a Former
Member that may be carried back to a taxable year in which the Former Member was
a Member.

8.RESOLUTION OF DISPUTES.

        (a)  Any dispute or ambiguity concerning the amount of any payment
provided for under this Agreement shall be resolved by Parent in a manner
consistent with the principles and procedures set forth in this Agreement. The
judgment of Parent shall be conclusive and binding upon each of the parties to
this Agreement.

        (b)  Parent may from time to time establish any other special rules that
Parent in its sole discretion deems necessary or appropriate to carry out the
purposes of this Agreement.

9.NEW SUBSIDIARIES.

        Any corporation formed or acquired by Parent or a Member, directly or
indirectly, which becomes a Member shall become a party to this Agreement and
shall be required to sign a consent in the form of Exhibit A, attached hereto,
when it becomes a Member. The direct parent of such new Member hereby agrees to
require such new Member to sign such consent. Upon the signing of such consent,
the parties to this Agreement hereby agree to be bound with respect to such new
Member in the same manner as they are bound with respect to any other Member.

10.EFFECTIVE DATE.

        This Agreement shall be effective on the date first above written and
shall remain in effect for each taxable year thereafter in which a Member is
included in a consolidated federal income tax return filed by Parent.

11.MISCELLANEOUS PROVISIONS.

        (a)  This Agreement contains the entire understanding of the parties
hereto with respect to the subject matter contained herein and supersedes all
prior written, oral or implied understandings, representations and agreements
among the parties with respect thereto. No alteration, amendment, or

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modification of any of the terms of this Agreement shall be valid unless made by
an instrument signed in writing by an authorized officer of each party.

        (b)  This Agreement shall be binding upon and inure to the benefit of
each party hereto, its respective successors and assigns, and each Member of the
Group not a party hereto, to the extent it is not contrary to the laws of any
jurisdiction which governs any of the affected parties.

        (c)  This Agreement is not intended to benefit any person other than the
parties hereto, each of their respective successors and assigns, and Members of
the Group not a party hereto. No person not (i) a party, (ii) a party's
successor or assign or (iii) a Member of the Group shall be a third party
beneficiary hereof.

        (d)  This Agreement shall be governed by, interpreted and enforced in
accordance with the laws of the State of California (regardless of the laws that
might be applicable under principles of conflicts of laws).

        (e)  This Agreement may be executed simultaneously in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

        (f)    The descriptive headings of the paragraphs of this Agreement are
inserted for convenience only and shall not constitute a part hereof.

        (g)  Any notice or other communication required or permitted under this
Agreement shall be in writing and shall be personally delivered or sent by
certified or registered United States mail, postage prepaid, to the parties at
the following addresses (or at such other address as a party may specify by
notice to the others):

If to Parent:

Zenith National Insurance Corp.
21255 Califa Street
Woodland Hills, California 91367

If to any Subsidiary:

c/o Zenith National Insurance Corp.
21255 Califa Street
Woodland Hills, California 91367

Any such notice or communication shall be effective and be deemed to have been
given as of the dates delivered or mailed, as the case may be; provided that any
notice or communication changing any of the addresses set forth above shall be
effective and deemed to have been given only upon its receipt.

        (h)  Where the context so requires, the word "person" shall include a
corporation, firm, partnership or other form of association or entity.

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

    ZENITH NATIONAL INSURANCE CORP.               By:   /s/  STANLEY R.
ZAX      February 11, 1994

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Chairman and President                         ZENITH INSURANCE COMPANY        
      By:   /s/  FREDRICKA TAUBITZ      February 11, 1994

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Executive Vice President and Chief Financial Officer                        
CALREHAB SERVICES, INC.
(formerly ZNAT Rehabilitation Services, Inc.)               By:   /s/  FREDRICKA
TAUBITZ      

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                        CALFARM INSURANCE COMPANY               By:  
/s/  FREDRICKA TAUBITZ      

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                        CALFARM INSURANCE AGENCY               By:  
/s/  FREDRICKA TAUBITZ      

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                        CAL-AG INSURANCE SERVICES, INC.               By:  
/s/  FREDRICKA TAUBITZ      

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                        CALFARM ANNUITY SERVICES COMPANY               By:  
/s/  FREDRICKA TAUBITZ      

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                        ZNAT INSURANCE COMPANY               By:  
/s/  FREDRICKA TAUBITZ      

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                        CALFARM LIFE INSURANCE COMPANY               By:  
/s/  FREDRICKA TAUBITZ      

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EXHIBIT A
CONSENT OF NEW SUBSIDIARY

        The undersigned hereby agrees, subject to the agreement or approval of
the appropriate regulatory authorities (as required by law), to be bound as a
Subsidiary by the attached Amended and Restated Tax Sharing Agreement, dated as
of January 1, 1991 (the "Agreement"). By signing this Consent, the undersigned
will have all rights and obligations of a Subsidiary under said Tax Sharing
Agreement as of the date the undersigned became a Member (as defined in the
Agreement).

    [NAME OF CORPORATION],
a [state] corporation                

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By:
Title:

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CONSENT OF NEW SUBSIDIARY

The undersigned hereby agrees, subject to the agreement or approval of the
appropriate regulatory authorities (as required by law), to be bound as a
Subsidiary by the attached amended and Restated Tax Sharing Agreement, dated as
of January l, 1991 (the "Agreement"). By signing this Consent, the undersigned
will have all rights and obligations of a Subsidiary under said Tax Sharing
Agreement as of the date the undersigned became a Member (as defined in the
agreement).

    ZENITH STAR INSURANCE COMPANY,
A TEXAS CORPORATION

 
 
By:
 
/s/  FREDRICKA TAUBITZ      

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CONSENT OF NEW SUBSIDIARY

The undersigned hereby agrees, subject to the agreement or approval of the
appropriate regulatory authorities (as required by law), to be bound as a
Subsidiary by the attached amended and Restated Tax Sharing Agreement, dated as
of January 1, 1991 (the "Agreement"). By signing this Consent, the undersigned
will have all rights and obligations of a Subsidiary under said Tax Sharing
Agreement as of the date the undersigned became a Member (as defined in the
agreement).

    PERMA-BILT,
A NEVADA CORPORATION

 
 
By:
 
/s/  DANIEL SCHWARTZ      

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AMENDED AND RESTATED TAX SHARING AGREEMENT