ACE LTD
10-K, 1997-12-24
FIRE, MARINE & CASUALTY INSURANCE
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<PAGE>
 
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                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                               ----------------
 
                                   FORM 10-K
 
  [X]        ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE
                        SECURITIES EXCHANGE ACT OF 1934
 
                 For the fiscal year ended September 30, 1997
 
                                      OR
 
  [_]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE
                        SECURITIES EXCHANGE ACT OF 1934
 
                          COMMISSION FILE NO. 1-11778
 
                               ----------------
 
                                  ACE LIMITED
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
            CAYMAN ISLANDS                         NOT APPLICABLE
    (JURISDICTION OF INCORPORATION)     (I.R.S. EMPLOYER IDENTIFICATION NO.)
 
                               THE ACE BUILDING
                             30 WOODBOURNE AVENUE
                                HAMILTON HM 08
                                    BERMUDA
                                (441) 295-5200
              (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
       INCLUDING AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               ----------------
 
          SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
 
<TABLE>
<CAPTION>
                                                              NAME OF EXCHANGE
             TITLE OF EACH CLASS                            ON WHICH REGISTERED
             -------------------                            -------------------
<S>                                            <C>
 Ordinary Shares, par value $0.125 per share              New York Stock Exchange
</TABLE>
 
                               ----------------
 
       SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: NONE
 
                               ----------------
 
  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter periods that the
registrant was required to file such reports) and (2) has been subject to such
filing requirements for the past 90 days.  Yes X No
 
  Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of the registrant's knowledge, in definitive proxy or information
statements incorporated by reference into Part III of this Form 10-K or any
amendment to this Form 10-K. ()
 
  As of December 16, 1997, there were 54,519,540 Ordinary Shares par value
$0.125 of the Registrant outstanding and the aggregate market value of voting
stock held by non-affiliates at such date was approximately $4.71 billion. For
the purposes of this computation, shares held by directors (and shares held by
any entities in which they serve as officers) and officers of the registrant
have been excluded. Such exclusion is not intended, nor shall it be deemed, to
be an admission that such persons are affiliates of the registrant.
 
                      DOCUMENTS INCORPORATED BY REFERENCE
 
  Certain portions of registrant's definitive proxy statement relating to its
Annual General Meeting of Shareholders scheduled to be held on February 6,
1998, are incorporated by reference into Part III of this report and certain
portions of the 1997 Annual Report to Shareholders are incorporated by
reference into Parts II and IV of this report.
 
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<PAGE>
 
                                  ACE LIMITED
 
                                 INDEX TO 10-K
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
                                     PART I
 
 <C>      <S>                                                               <C>
 Item 1.  Business.......................................................     1
 Item 2.  Properties.....................................................    21
 Item 3.  Legal Proceedings..............................................    21
 Item 4.  Submission of Matters to a Vote of Security Holders............    21
 
                                    PART II
 
          Market for the Registrant's Ordinary Shares and Related
 Item 5.  Stockholder Matters............................................    23
 Item 6.  Selected Financial Data........................................    23
          Management's Discussion and Analysis of Results of Operations
 Item 7.  and Financial Condition........................................    23
 Item 7A. Quantitative and Qualitative Disclosures About Market Risk.....    23
 Item 8.  Financial Statements and Supplementary Data....................    23
          Changes in and Disagreements with Accountants on Accounting and
 Item 9.  Financial Disclosure...........................................   23
 
                                    PART III
 
 Item 10. Directors and Executive Officers of the Registrant.............    24
 Item 11. Executive Compensation.........................................    24
 Item 12. Security Ownership of Certain Beneficial Owners and Management.    24
 Item 13. Certain Relationships and Related Transactions.................    24
 
                                    PART IV
 
          Exhibits, Financial Statements, Schedules and Reports on Form
 Item 14. 8-K............................................................    24
</TABLE>
<PAGE>
 
                                    PART I
 
ITEM 1. BUSINESS
 
  Certain terms used below are defined in the "Glossary of Selected Insurance
Terms" appearing on page 15.
 
 General
 
  ACE Limited ("ACE") is a holding company incorporated with limited liability
under the Cayman Islands Companies Law and maintains its principal business
office in Bermuda. The Company, through its Bermuda-based operating
subsidiaries, A.C.E. Insurance Company, Ltd. ("ACE Insurance"), Corporate
Officers & Directors Assurance Ltd. ("CODA") and Tempest Reinsurance Company
Limited ("Tempest"), provides insurance and reinsurance for a diverse group of
international clients. In addition, the Company provides funds at Lloyd's to
support underwriting by syndicates managed by Methuen Underwriting Limited
("MUL"), ACE London Aviation Limited ("ALA") and ACE London Underwriting
Limited ("ALU"), its indirect wholly owned subsidiaries. The term "the
Company" refers to ACE and its subsidiaries excluding MUL, ALA and ALU.
 
  The Company's long-term business strategy focuses on achieving underwriting
profits and providing value to its clients and shareholders through the
utilization of its growing capital base within the insurance and reinsurance
markets. As part of this strategy, the Company acquired CODA in 1993. During
1994 and 1995, the Company diversified its product portfolio from excess
liability insurance and directors and officers liability insurance to
accommodate the needs of its expanding, global client base of multinational
corporations by adding satellite insurance, aviation insurance, excess
property insurance and financial lines products. This diversification added
balance to the risk of the existing portfolio of insurance products and
enhanced the Company's overall profit potential while utilizing its existing
capital base. The Company continued its strategic diversification with the
acquisition in March 1996 of 51 percent of Methuen Group Limited ("Methuen"),
the holding company for MUL, and in July 1996 of Tempest, a leading Bermuda-
based property catastrophe reinsurer.
 
  The acquisition of Tempest provided the Company with a unique opportunity to
expand into the property catastrophe reinsurance business through an
established and well known reinsurance company. Tempest underwrites property
catastrophe reinsurance on a worldwide basis, emphasizing excess layer
coverages, and has large aggregate exposures to man-made and natural
disasters. The short-tail nature of the property catastrophe business and
shorter loss payout patterns complement the generally longer-tail nature of
the Company's other product lines.
 
  In November 1996, the Company acquired the remaining 49 percent interest in
Methuen. Also in November 1996, the company acquired Ockham Worldwide Holdings
plc which subsequently changed its name to ACE London Holdings Ltd ("ACE
London"). ACE London owns two Lloyd's managing agencies, ALA and ALU.
 
                                       1
<PAGE>
 
  In March 1997, the Company, together with two other insurance companies,
formed a managing general agency in Bermuda to provide underwriting services
to the three organizations for political risk insurance coverage. The new
company, Sovereign Risk Insurance Ltd ("Sovereign") issues subscription
policies with the Company assuming 50 percent of each risk underwritten. The
Company currently cedes 10 percent of all risks assumed from Sovereign.
Sovereign offers limits of up to $50 million per project and $100 million per
country.
 
  On September 18, 1997, the Company announced it had executed a definitive
agreement for the acquisition, through a newly-created U.S. Holding Company,
of Westchester Specialty Group, Inc. ("WSG"), an indirect wholly owned
subsidiary of Xerox Corporation. WSG, through its insurance subsidiaries,
provides specialty commercial property and umbrella liability coverages in the
U.S. Under the terms of the agreement, the Company will purchase all of the
outstanding capital stock of WSG for aggregate cash consideration of
approximately $333 million. In connection with the acquisition, National
Indemnity, a subsidiary of Berkshire Hathaway, will provide $750 million (75
percent quota share of $1 billion) of reinsurance protection to WSG with
respect to their loss reserves for the 1996 and prior accident years. The
acquisition which is subject to, among other matters, regulatory approval and
other customary closing conditions, is expected to close in early 1998. The
Company expects to finance this transaction with $250 million of bank debt and
the remainder with available cash.
 
  On September 30, 1997, the Company announced the incorporation of ACE
Insurance Company Europe Limited (AICE), as part of the International
Financial Services Centre in Dublin, Ireland. AICE has been granted a license
to write all 18 classes of non-life insurance in all member states of the
European Union.
 
  The following table sets forth an analysis of gross premiums written for
each of the years ended September 30, 1997, 1996 and 1995:
 
<TABLE>
<CAPTION>
                                     FOR THE YEARS ENDED SEPTEMBER 30,
                          --------------------------------------------------------
                          1997 GROSS         1996 GROSS         1995 GROSS
                           PREMIUMS           PREMIUMS           PREMIUMS
                           WRITTEN   PERCENT  WRITTEN   PERCENT  WRITTEN   PERCENT
                          ---------- ------- ---------- ------- ---------- -------
                                                 (MILLIONS)
<S>                       <C>        <C>     <C>        <C>     <C>        <C>
ACE Insurance (including
 CODA)
  Excess liability......    $144.6     19%     $210.2     33%     $246.9     57%
  Financial lines.......     134.7     18%      120.2     19%        9.2      2%
  Satellite.............     111.2     15%      104.0     16%       44.9     10%
  Directors and Officers
   liability............      85.4     11%       97.6     15%      105.0     24%
  Aviation..............      35.5      5%       33.3      5%        8.9      2%
  Excess property.......      25.4      3%       16.5      3%        5.6      1%
  Other.................       7.4      1%       14.8      2%       15.3      4%
                            ------    ----     ------    ----     ------    ----
    Total...............     544.2     73%      596.6     92%      435.8    100%
Lloyd's syndicates......      78.8     11%       14.4      2%        0.0      0%
Property catastrophe
 (Tempest)..............     119.6     16%       34.8      5%        0.0      0%
                            ------    ----     ------    ----     ------    ----
                            $742.6    100%     $645.8    100%     $435.8    100%
                            ======    ====     ======    ====     ======    ====
</TABLE>
- --------
(1) Tempest was acquired on July 1, 1996 and thus gross premiums written for
    Tempest in fiscal 1996 only relate to the three month period since
    acquisition.
 
 Insurance Operations (excluding Lloyd's operations)
 
  The Company, through ACE Insurance and CODA, provides property and casualty
insurance coverage, including excess liability insurance, directors and
officers liability insurance, satellite insurance, aviation insurance, excess
property insurance and financial lines products, to industrial, commercial and
other enterprises.
 
                                       2
<PAGE>
 
  The nature of the insurance coverages provided by the Company are generally
expected to result in low frequency but high severity of individual losses.
This loss pattern is particularly evident in the Company's excess liability
insurance due to the high attachment points and large limits offered. The
Company does purchase limited excess of loss clash reinsurance with respect to
its excess liability policies and has also purchased reinsurance designed to
limit its exposure on the satellite, financial lines, aviation and excess
property lines of business.
 
  At September 30, 1997 approximately 67 percent of the Company's written
premiums came from North America with approximately 23 percent coming from the
United Kingdom and continental Europe and approximately 10 percent from other
countries.
 
 Excess Liability
 
  The Company seeks to provide the highest layer of excess liability coverage
in the insurance programs of the world's major corporations and requires that
at least a portion of its coverage be the highest layer in a policyholder's
insurance program. The Company writes excess liability coverage, on an
occurrence first reported stand alone form, generally in excess of a minimum
attachment point of $100 million per occurrence and with a minimum limit of
$10 million and a maximum limit of $200 million per occurrence and in the
aggregate for all covered occurrences of which notice is given during such
year. Such limit is subject to reinstatement at the insureds election for
incidents post reinstatement. Effective on or after December 15, 1994 the
Company imposed an annual aggregate sublimit for integrated occurrences of
$100 million for all new and renewal business that purchases limits greater
than $100 million. During 1994, the Company reduced the minimum attachment
point to $50 million (or the foreign currency equivalent) from $100 million
for certain classes of non-U.S. domiciled excess liability risks. In this
instance, the Company offers limits up to twice the reduced attachment point.
 
  The Company maintains excess of loss clash reinsurance on a calendar year
basis which provides the Company with certain protection from losses arising
from a single set of circumstances (occurrence) under more than one excess
liability insurance policy. The clash reinsurance agreements do not cover all
occurrences covered by the Company's policies and, in particular, do not cover
integrated occurrences involving one insured or similar occurrences in which
multiple insureds are found liable (e.g., similar defective products
manufactured or sold by multiple insureds).
 
 Directors and Officers Liability
 
  The Company offers up to $75 million of directors and officers liability
insurance with a maximum of $50 million being provided for corporate
reimbursement coverage. The Company believes this to be the largest amount of
directors and officers liability insurance available from a single
underwriting source. The directors and officers liability insurance is written
on a claims made form and is provided to large industrial corporations, not-
for-profit corporations, financial institutions and others.
 
 Satellite
 
  The Company's satellite insurance operations offers separate gross limits of
up to $50 million per risk for launch insurance, including ascent to orbit
and/or initial testing and up to $50 million per risk for in-orbit insurance.
The Company has entered into a surplus treaty arrangement which provides for
up to $25 million of reinsurance on each risk. Prior to February 1996, the
Company offered separate limits of up to $25 million per risk, which was fully
retained by the Company.
 
  Satellite insurance falls within a small, well defined market characterized
by a limited number of brokers, underwriters and international clients. There
are also a limited number of satellite and launch vehicle manufacturers in the
world. The growing worldwide demand for satellite communications capabilities
by both governments and private enterprises has resulted in an increase in the
number of satellites per annum requiring launch and/or in-orbit insurance
coverage. The typical satellite insurance policy is written on a quota-share
basis,
 
                                       3
<PAGE>
 
rather than on an excess of loss basis. The insured value of a commercial
satellite now ranges from approximately $150 million to $300 million.
 
 Financial Lines
 
  Financial lines utilizes transactions which combine the concepts of finance
with the principles of insurance. Typically, clients purchasing these products
are seeking insurance or reinsurance for exposures which are difficult to
place because of limited or nonexistent capacity, ineffective terms or
inefficient pricing being provided by traditional insurance markets.
Alternatively, they may use these insurance or reinsurance products to cover
loss exposures which are not appropriately addressed by current products
available.
 
  Unlike certain traditional insurance, each financial lines contract is
individually tailored to meet the needs of the insured. Financial Lines
programs typically have the following common characteristics: multi-year
contract terms; broad coverage that includes stable capacity and pricing for
the insured; insured participation in the results of their own loss
experience; and aggregate limits. The specific product types offered by
financial lines include the various forms of finite risk insurance. Examples
of finite risk products include the combination of self-insurance with an
excess program, the combination of various coverages subject to a single
retention and insured limit or programs that insure large loss exposure or a
portfolio of losses over a period of years. Other product types offered are
specialty insurances which cover financial exposures or involve financial
instruments.
 
  Financial lines products were created by the need to service the more
complex risks of today's corporations. The Company anticipates drawing on the
strong franchise the Company maintains with its current client base by
providing a policy which will further enhance a client's risk management
program. Using both insurance and reinsurance brokers and investment bankers,
it also anticipates attracting new clients for the Company.
 
  The Company believes it has a competitive advantage in the marketplace
because of the financial strength of the Company and its ability to offer
significant risk transfer while still allowing the insured to retain some of
its own exposures. Risk transfer is important to the insured thereby enabling
it to meet the accounting and regulatory requirements related to the purchase
of insurance or reinsurance.
 
  Financial lines has a flexible approach to limits offered, attachment points
and coverages provided primarily due to the risk sharing feature and use of
funding mechanisms which are generally included in the contract. Each contract
is unique because it is tailored to the insurance needs, specific loss history
and financial strength of the client. Premium volume, as well as the number of
contracts written, can vary significantly from period to period due to the
nature of the contracts being written. Profit margins may vary from contract
to contract depending on the amount of underwriting risk and investment risk
assumed on each contract.
 
 Aviation
 
  The aviation insurance group offers limits of up to $150 million per
insured, with no minimum attachment point. The Company reduces its net
exposure per policy to approximately $50 million with a dedicated reinsurance
program. Classes of business written include aviation product liability,
aviation manufacturers (including hull and all risks and products liability);
aviation refuellers; and airport and airport contractors, together with
certain aircraft risks.
 
  Generally, the Company will write aircraft liability in conjunction with one
or more of the other aviation products, and where the aircraft (owned or non-
owned) is used for corporate purposes. Coverage will include third party
bodily injury, property damage and passenger legal liability.
 
 Excess Property
 
  The Company also offers excess property insurance. Its primary target
markets are chemical, energy, electronics, heavy manufacturing, mineral, oil
and gas, and utilities. Coverage is also available to select manufacturing,
industrial and institutional risks. Excess property insurance coverage is
offered with limits of up
 
                                       4
<PAGE>
 
to $50 million per risk, typically above an attachment point of $25 million.
In certain circumstances, the Company uses reinsurance to establish the
retained net limit per risk. Attachment levels, terms and pricing for each
risk are derived from the Company's property underwriters' independent
assessment of "probable maximum loss", a benchmark of risk frequency and
severity.
 
 Marketing and Underwriting
 
  The Company, through ACE Insurance and CODA, markets its insurance products
through brokers and seeks to maintain a competitive advantage by providing
insurance coverages which require utilization of technical skills to
underwrite individual risks, emphasizing quality rather than volume of
business to obtain a suitable spread of risk. This enables the Company to
operate with a relatively small number of employees and, together with the
reduced costs of operating in a favorable regulatory and tax environment,
results in significantly lower administrative expenses relative to other
companies in the industry.
 
  Policyholders are obtained through non-U.S. insurance brokers who generally
receive a brokerage commission on any business accepted and bound by the
Company. The Company is not committed to accept any business from any
particular broker and brokers do not have the authority to bind the Company.
All policy applications (both for renewals and new policies) are subject to
approval and acceptance by the Company in its Bermuda office. A substantial
number of policyholders meet with the Company outside of the United States
each year to discuss their insurance coverage. The Company does not believe
that conducting its operations through its offices in Bermuda has materially
affected its underwriting and marketing activities to date.
 
  The Company receives business from approximately 200 non-U.S. brokers of
which 10 produced approximately 93 percent of the Company's business in 1997.
The following table sets forth the percentage of the Company's insurance
business placed through each broker and its affiliates placing more than 10
percent of the Company's business.
 
<TABLE>
<CAPTION>
                                                                    YEAR ENDED
                                                                  SEPTEMBER 30,
                                                                  ---------------
                                                                  1997 1996  1995
                                                                  ---- ----  ----
<S>                                                               <C>  <C>   <C>
J&H Marsh & McLennan, Incorporated (1)(3)........................ 42%   42%   59%
Aon Corporation (2)(3)........................................... 17%   16%   14%
</TABLE>
- --------
(1) During 1997, Marsh & McLennan, Incorporated acquired Johnson & Higgins.
    For fiscal 1996 and 1995, the percentage of business placed by Marsh &
    McLennan, Incorporated was 31 percent and 43 percent, respectively and the
    percentage of business placed by Johnson & Higgins was 11 percent and 16
    percent, respectively.
(2) During 1997, Aon Corporation acquired Alexander & Alexander Services, Inc.
    For fiscal 1996 and 1995, the percentage of business placed by Aon
    Corporation was 10 percent and 8 percent, respectively and the percentage
    of business placed by Alexander & Alexander Services, Inc. was 6 percent
    for both years.
(3) The percentages shown in the table for fiscal 1997 reflect the business
    placed by the combined entities and their affiliates for the entire year.
 
  The Company has experienced an increase in the number of submissions in non-
North American business as a result of the activities of its London
representative office since its opening in September 1994 and expects further
growth as a result of its activities. The London representative office assists
brokers throughout the United Kingdom, the rest of Europe, the Middle East,
South Africa, the Far East and Australia in gaining access to the Company's
underwriting capacity in Bermuda. All underwriting activity continues to take
place in Bermuda.
 
  The Company employs underwriting staff with substantial industry experience.
The underwriter's primary objective is to assess the potential for an
underwriting profit, a process complicated in some cases by the limited amount
of data for claims which would have been covered by the Company's policy form
and which would have exceeded its policy's attachment point. The risk
assessment process undertaken by the Company involves a comprehensive analysis
of historical data and estimates of future value of losses which may not be
evident in the historical data. The factors which the Company considers
include the type of risk, the attachment point and coverage limits, the type,
size, complexity and location of the potential insureds operations, financial
data, the industry in which the potential insured operates, details of the
underlying insurance coverage provided, loss history and future corporate
plans.
 
                                       5
<PAGE>
 
 Competition
 
  Competitive forces in the international property and casualty insurance
business are substantial. Results are a function of underwriting and investment
performance, direct costs associated with the delivery of insurance products,
including the costs of regulation, the frequency and severity of both natural
and man-made disasters, as well as inflation (actual, social and judicial),
which impact loss costs. Decisions made by insurers concerning their mix of
business (offering certain types of coverage but declining to write other
types), their methods of operations and the quality and allocation of their
assets (including any reinsurance recoverable balances) will all affect their
competitive position. Some insurers continue to incur liability for business
written decades earlier covering gradual pollution and certain product
liability exposures. The relative size and reputation of insurers may influence
purchasing decisions of present and prospective customers and will contribute
to both geographic and industrial sector market penetration. Oversupply of
available capital has historically had the effect of encouraging competition
and depressing prices. Capital accumulation to support large excess liability
policies and the availability of suitably experienced underwriters are partial
barriers to entry, but insurance pricing will continue to be influenced by
supply. The Company's competitive position in the casualty insurance industry
is influenced by all of these factors. The Company believes it has a number of
competitive advantages in the insurance products which it provides. Among the
advantages are its strong capital base, its ability to market a number of
insurance products to its existing client and potential client base and its
ability to be flexible in providing contracts which extend coverage for periods
in excess of one year.
 
  The Company believes that it is unique in that it offers up to $200 million
of excess liability coverage and that all or a portion of its coverage is
generally the highest layer of a client's insurance program. There are a small
number of insurers that compete with the Company, including American
International Group, Inc. ("AIG"), several large European insurers, Exel
Limited ("EXEL"), certain Lloyd's syndicates and Starr Excess Liability
Insurance Co. Ltd. ("Starr"). The Company has continued to experience
competition during 1997 in this line of business.
 
  There is a small group of dominant insurers in the directors and officers
liability insurance area and the Company faces strong competition in that area
from competitors such as Executive Risk Insurance Company, AIG, Chubb Group of
Insurance Cos., CNA, EXEL, certain Lloyd's syndicates and Starr. The Company
continues to experience increased competition in this market. However, the
Company has been successfully marketing its products through the London
representative office, resulting in a number of new non-North American
accounts.
 
  The Company believes that the available limits, stable capacity and financial
security offered by the Company provide a competitive advantage in the
satellite insurance market. There are currently a limited number of
underwriters available to service the satellite insurance market, however, the
amount of capacity available in the market place has grown substantially and
there now appears to be excess capacity in this market. The Company believes
that there will be continued demand for its services, as evidenced by
commitments already provided by the Company for future satellite insurance
coverage. Other major firms offering satellite coverage include Assicuraziona
Generali S.p.A., International Technology Underwriters, Inc., La Reunion
Aerienne, The Marchant Space Consortium, Munich Reinsurance and United States
Aviation Insurance Group.
 
  There are a number of companies in the insurance market which form the
competition for financial lines, including Centre Reinsurance (Bermuda) Limited
and several of the major international insurance companies, such as AIG and
American Reinsurance. The demand for individually tailored insurance products,
such as those offered by financial lines is growing due to the ever-changing
and more complex risks facing today's corporations. The Company believes it has
a competitive advantage in the marketplace because of the financial strength of
the Company and its ability to offer significant risk transfer in its contracts
while still allowing the insured to retain some of its own exposures.
 
  In providing coverage for aviation insurance exposures, the Company faces
significant competition from a small number of specialty firms, including
certain Lloyd's syndicates and several large European insurers. The Company
believes that the limited number of underwriters available to service the
aviation insurance market, particularly in areas such as product manufacturers
liability and airport liability, and the commitment of significant capital to
this long-tail type of business are barriers to entry. The Company believes
that the demand for this type of specialty coverage is growing, as evidenced by
the volume of submissions received and the number of accounts written by the
Company to date.
 
                                       6
<PAGE>
 
  There are a diverse number of companies providing excess property insurance
coverage for increasingly complex multi-site, multi-national risks. Although
the market is very competitive, the Company believes that it has several
competitive advantages in offering global excess "all risk" coverage,
including its experienced underwriting team, access to the latest technology
and analytical methods, a precise market focus and a capital base that is
unburdened by historic unprofitability and/or uncontrolled accumulation of
exposures.
 
  The Company expects that a significant portion of the future growth in most
of its lines of business will continue to come from new non-U.S. accounts.
Accordingly, the Company continues to promote its products overseas,
particularly to large industrial companies in Latin America, Europe, the
Middle East, South Africa, Australia and the Far East.
 
  The Company has received a group rating of A+ (Superior) from A.M. Best
Company, a leading insurance rating company ("A.M. Best"). The most current
rating covers the Company, together with its operating subsidiaries ACE
Insurance and CODA. ACE Insurance and CODA have also received A+ (Good) claims
paying ratings from Standard & Poor's Corporation (S&P). These ratings are
based upon factors relevant to policyholders, agents and intermediaries and
are not directed toward the protection of investors. Such ratings are not
recommendations to buy, sell or hold securities.
 
 Reinsurance Operations
 
  The Company's reinsurance activities are principally conducted through
Tempest, its wholly owned subsidiary, which was acquired in July 1996.
However, ACE Insurance offers financial lines reinsurance products (see
"Insurance Operations") and the Lloyd's syndicates in which the Company
participates also participate in certain reinsurance markets (see "Lloyd's
operations").
 
  In addition, in April 1997, ACE Insurance announced that it had signed a
quota share treaty reinsurance agreement with the Multilateral Investment
Guarantee Agency ("MIGA"), part of the World Bank Group. MIGA provides
coverage for foreign investments in developing countries. The agreement allows
MIGA to provide private investors and developing countries additional capacity
to support developmentally sound investment projects. The coverages offered
will be the same as those offered by MIGA's guarantee program, namely,
transfer restriction, expropriation, war and civil disturbance and breach of
contract. The quota share treaty offers limits of up to $25 million per
contract with an aggregate of $100 million per country.
 
  Tempest provides property catastrophe reinsurance worldwide to insurers of
commercial and personal property, typically under treaties having a duration
of one year. Property catastrophe reinsurance protects a ceding company
against an accumulation of losses covered by the insurance policies it has
issued arising from a common event or "occurrence." Ceding companies may
purchase reinsurance to achieve a number of results, including: reduction of
net exposure on individual risks or groups of risks, which enables the ceding
company to underwrite larger risks, or accept more business than its own
capital resources would ordinarily support; diversification of risks;
protection against the effect of major catastrophic losses, such as losses
involving an accumulation of single retentions; stabilization of a ceding
company's operating results by smoothing its loss experience to protect its
financial position; and maintenance by a ceding company of acceptable surplus,
reserve and other financial ratios.
 
  Tempest's property catastrophe reinsurance contracts cover unpredictable
natural or man-made disasters, such as hurricanes, windstorms, hail storms,
earthquakes, volcanic eruptions, conflagrations, freezes, floods, fires and
explosions. Tempest's predominant exposure under such coverage is to property
damage. However, other risks, such as business interruption may also be
covered when arising from a covered peril. In accordance with market practice,
Tempest's property catastrophe reinsurance contracts generally exclude certain
risks such as war, nuclear contamination, and radiation.
 
  Tempest underwrites reinsurance principally on an excess of loss basis.
During the twelve month period ended September 30, 1997, approximately 98
percent of premiums were written on an excess of loss basis. Other
 
                                       7
<PAGE>
 
property reinsurance written by Tempest on a limited basis for select clients,
includes proportional property and per risk excess of loss treaty reinsurance.
At September 30, 1997, Tempest had 224 programs in force with 174 clients.
 
  Tempest underwrites a substantial portion of its business in currencies
other than U.S. dollars and may from time to time experience exchange gains
and losses and incur significant underwriting losses in currencies other than
U.S. dollars. The following table sets forth the amount of Tempest's gross
premiums written allocated by territory of coverage:
 
<TABLE>
<CAPTION>
                                                       TEN MONTHS
                                         YEAR ENDED       ENDED      YEAR ENDED
                                        SEPTEMBER 30, SEPTEMBER 30, NOVEMBER 30,
                                           1997(I)        1996          1995
                                        ------------- ------------- ------------
      <S>                               <C>           <C>           <C>
      United States....................      68.4%         64.0%        55.7%
      United Kingdom...................      12.8          13.3         15.9
      Australia & New Zealand..........       6.3           6.0         11.3
      Japan............................       3.6           3.8          7.2
      Other............................       8.9          12.9          9.9
                                            -----         -----        -----
                                            100.0%        100.0%       100.0%
                                            =====         =====        =====
</TABLE>
- --------
(i) Tempest has a November 30 fiscal year-end.
 
 Marketing and Underwriting
 
  Tempest markets its reinsurance products worldwide through reinsurance
brokers. Tempest's underwriting team builds relationships with key brokers and
clients by explaining Tempest's approach and demonstrating responsiveness to
customer needs. Tempest's approach to the business of reinsurance takes a
long-term perspective. Management believes that continual strengthening of the
relationships between Tempest, its producing brokers and their clients will
continue to contribute to a stable portfolio necessary to achieve continuity.
By retaining clients, Tempest seeks to build up extensive knowledge of them
and gain additional insight to enable a more accurate assessment of their
exposures.
 
  Tempest receives business from approximately 31 brokers. The following table
sets forth the percentage of Tempest's business written through each broker
and its affiliates placing more than 10 percent of Tempest's business:
 
<TABLE>
<CAPTION>
                                                     TEN MONTHS
                                       YEAR ENDED       ENDED      YEAR ENDED
                                      SEPTEMBER 30, SEPTEMBER 30, NOVEMBER 30,
                                          1997          1996          1995
                                      ------------- ------------- ------------
      <S>                             <C>           <C>           <C>
      J&H, Marsh & McLennan,
       Incorporated (1)..............      34%           30%          34%
      E.W. Blanche Co................      15%            7%           5%
      Greig Fester International
       Limited.......................       7%            7%          16%
</TABLE>
- --------
(1) During 1997, Marsh & McLennan, Incorporated acquired Johnson & Higgins.
    For 1996 and 1995 the percentage of business placed by Marsh & McLennan,
    Incorporated was 26 percent and 30 percent, respectively and the
    percentage of business placed by Johnson & Higgins was 4 percent for both
    periods. The percentage shown in the table for fiscal 1997 reflect the
    business placed by the combined entity and its affiliates for the entire
    fiscal 1997 year.
 
  Rates, limits, retention and other reinsurance terms and conditions are
generally established in a worldwide competitive market that evaluates
exposure and balances demand for property catastrophe coverage against the
available supply. Tempest believes it is perceived by the market as being a
"lead" reinsurer and is typically involved in the negotiation and quotation of
the terms and conditions of the majority of the contracts in which it
participates.
 
  Because Tempest underwrites property catastrophe reinsurance and has large
aggregate exposures to natural and man-made disasters, Tempest's claims
experience generally will involve infrequent events of great severity. Tempest
seeks to diversify its reinsurance portfolio to moderate the impact of this
severity. The principal means of diversification are by geographic coverage
and by varying attachment points and imposing coverage limits per program.
Tempest also establishes zonal accumulation limits to avoid concentrations of
risk within particular geographic areas.
 
                                       8
<PAGE>
 
  Tempest applies an underwriting process based on models that use exposure
data submitted by prospective reinsureds in accordance with requirements set
by Tempest's underwriters. The account review process includes an analysis of
exposures both by line of business and geographic location. The underwriting
models used by Tempest have been created and continue to be developed in-
house. Tempest believes that these risk analysis tools provide greater utility
and flexibility in comparison with external vendor catastrophe modeling
products, especially when confronted with unique exposures or non-standard
coverage.
 
  Tempest analyses its exposure in more detail using simulation modeling of
loss scenarios and their effects on Tempest's overall portfolio. This approach
enables Tempest to assess the portfolio risk, in particular to account for the
risk of a combination of multiple events worldwide in a single year.
 
  Tempest purchased a modest amount of retrocessional cover during the current
fiscal year.
 
 Competition
 
  The property catastrophe reinsurance industry is highly competitive. Tempest
competes worldwide with major U.S. and non-U.S. property catastrophe
reinsurers, other Bermuda-based property catastrophe reinsurers and
reinsurance departments of numerous multi-line insurance organizations.
Tempest competes effectively because of its strong capital position, the
quality of service provided to customers, the leading role Tempest plays in
setting the terms, pricing and conditions in negotiating contracts, its
customised approach to risk selection and the sponsorship and support of its
parent, ACE.
 
  Tempest has received a rating of A (Excellent) from A.M. Best and a claims
paying ability rating of A (Good) from S&P.
 
 Lloyd's Operations
 
  Lloyd's is a long established insurance marketplace where many varied forms
of insurance are sold by syndicates, which until 1994, were annual joint
ventures of participating capital providers known as "Names". Participation as
a Name on a syndicate carries with it unlimited liability for the Name's share
of any insurance losses incurred by the syndicate (each Name participating
severally). In 1994, the rules relating to membership of Lloyd's were changed
to allow limited liability corporate capital vehicles to enter the Lloyd's
marketplace as capital providers. Typically, Lloyd's syndicates now comprise a
mixture of limited and unlimited liability capital combining in the annual
joint venture.
 
  Several of the underwriting years of the late 1980's and early 1990's were
particularly unprofitable for many of the syndicates operating at Lloyd's.
This proved to be financially disastrous for some of the Names on the affected
syndicates due to the unlimited liability of their participation. In August
1996, Lloyd's implemented it's "Reconstruction and Renewal" proposals which
involved a new company, Equitas being authorised to reinsure the liabilities
of the 1992 and prior years of account of most of the syndicates at Lloyd's.
The funding to give effect to these proposals came from a variety of sources
including the premiums on the liabilities assumed by Equitas as well as a
series of levies charged to entities that had historically provided services
to the Lloyds insurance market (including managing agencies and insurance
brokers).
 
  Participation in selective syndicates in the Lloyd's insurance market
provides the company with new lines of business in the aviation, marine and
non-marine markets as well as the opportunity to diversify its insurance risk
profile through markets to which it would otherwise not have access. This
syndicate participation is through dedicated corporate capital vehicles thus
limiting the liability of the Company.
 
  In order to more closely monitor its syndicate participations the Company
has established a UK holding company (ACE UK Limited) which acquired three
managing agencies at Lloyd's namely MUL, ALA and
 
                                       9
<PAGE>
 
ALU. Through a central service company, these three managing agencies provide
accounting, reporting and ancillary insurance services to the syndicates
managed by them and on which the Company participates.
 
  For the 1997 year of account the Company has committed approximately $120
million of capital spread amongst the thirteen syndicates managed by MUL, ALA
and ALU supporting up to approximately $229 million of underwriting capacity.
For the 1998 year of account, the Company has agreed to provide funds at
Lloyd's of up to approximately $250 million to support up to approximately
$485 million of underwriting capacity on syndicates managed by MUL, ALA and
ALU.
 
  There is significant competition in all classes of business transacted by
the syndicates emanating from a number of different markets worldwide.
Depending on the class of business concerned competition comes from the London
market; other Lloyd's syndicates and ILU Companies (Institute of London
Underwriters), major international insurers and reinsurers. On international
risks, competition also comes from the domestic insurers in the country of
origin of the insured.
 
  The syndicates are able to compete successfully by developing and
maintaining close, long term relationships with clients through a high quality
service and an ability to deliver innovative solutions tailored to the
client's needs.
 
  The Lloyd's market has received a rating of A (Excellent) from A.M. Best and
a claims paying ability rating of A+ (Good) from S&P.
 
 Claims Administration
 
  Claims arising under policies issued by ACE Insurance and CODA are managed
in Bermuda by ACE Insurance's claims department. This department maintains a
claims database into which all notices of loss are entered. If the claims
department determines that a loss is of sufficient severity, it makes a
further inquiry of the facts surrounding the loss and, if deemed necessary,
retains outside claims counsel to monitor claims. Based upon its evaluation of
the claim, the claims department may recommend that a case reserve in a
specified amount be established or that all or part of a claim be paid. The
claims department monitors all claims and, where appropriate, will recommend
the establishment of a new case reserve or the increase or decrease of an
existing case reserve with respect to a claim.
 
  With the exception of certain aviation coverages, ACE Insurance does not
undertake to defend its insureds. It has, in certain instances, provided
advice to insureds with respect to the management of claims. ACE Insurance
believes that its experience in resolving large claims and its proactive
approach to claims management has contributed to the favourable resolution of
several cases.
 
  Because ACE Insurance does not do business in the U.S., it must often rely
on U.S. counsel to assist it in evaluating liability and damages confronting
its insureds in the U.S. ACE Insurance does not believe that the information
received or the procedures followed have materially or adversely affected its
ability to identify, review or settle claims.
 
  Claims arising under contracts written by Tempest are managed in Bermuda by
Tempest. Tempest also maintains a claims database into which all notices of
loss are entered. Loss notices are received from brokers. They are reviewed
and case reserves are established for Tempest's portion of the loss. Case
reserves are then adjusted based on receipt of further notifications from
brokers.
 
  With respect to claims arising in Lloyd's syndicates, each syndicate
maintains a claims database into which all notices of loss are entered. These
are primarily notified by various central market bureaux, such as, through a
daily electronic data interchange message. Where a syndicate is a "leading"
syndicate on a Lloyd's policy, then
 
                                      10
<PAGE>
 
it acts through its underwriters and claims adjusters, on behalf of itself and
the following market, in dealing with the broker and/or insured for any
particular claim. This may involve the appointment of attorneys and/or loss
adjusters. The leading syndicates, together with the claims bureaux, advise
movements in case reserves to all syndicates participating on the risk.
 
  All information received with respect to case reserves, whether on "lead
business' or on "following business', are screened, validated and recorded by
the syndicates. The syndicates' claims departments can vary the case reserves
carried from those advised by the bureaux and can carry reserves for claims
not processed by the bureaux. Any such adjustments and entries are
specifically identifiable within the claims system.
 
 Unpaid Losses and Loss Expenses
 
  The Company is required to make provisions in its financial statements for
the estimated unpaid liability for losses and loss expenses for claims made
against it under the terms of its policies and agreements. Estimating the
ultimate liability for losses and loss expenses is an imprecise science
subject to variables that are influenced by both internal and external
factors. This is true because claim settlements to be made in the future may
be impacted by changing rates of inflation and other economic conditions,
changing legislative, judicial and social environments and changes in the
Company's claims handling procedures. In some cases, significant periods of
time, ranging up to several years or more, may elapse between the occurrence
of an insured loss, the reporting of the loss to the Company and the
settlement of the Company's liability for that loss. In other cases, the
period between first notice and final payment can be relatively short, even
less than one year.
 
  Several aspects of the Company's operations exacerbate the inherent
uncertainties in estimating its losses as compared to more conventional
insurance companies. Primary among these aspects are the limited amount of
statistically significant historical data regarding losses, particularly of
the type intended to be covered by the Company's excess liability policies and
the expectation that losses in excess of the attachment level of the policies
will be characterized by low frequency and high severity, limiting the utility
of claims experience of other insurers for similar claims. Accordingly, the
ultimate claims experience of the Company cannot be as reliably predicted as
may be the case with more traditional insurance companies, and there can be no
assurance that losses and loss expenses will not exceed the reserves.
 
  A number of the Company's insureds have given notice of claims relating to
breast implants or components or raw material thereof that had been produced
and/or sold by such insureds. Lawsuits, including class actions, involving
thousands of implant recipients have been filed in both state and federal
courts throughout the United States. Most of the federal cases have been
consolidated pursuant to the rules for Multidistrict Litigation ("MDL") to a
Federal District Court in Alabama, although cases are in the process of being
transferred back to federal courts or remanded to state courts. At June 30,
1994, the Company increased its then existing reserves relating to breast
implant claims. Although the reserve increase was partially satisfied by an
allocation from existing IBNR, it also required an increase in the Company's
total reserve for unpaid losses and loss expenses at June 30, 1994 of $200
million. The increase in reserves was based on information made available in
the pending lawsuits and information from the Company's insureds and was
predicated upon an allocation between coverage provided before and after the
end of 1985 (when the Company commenced underwriting operations). No
additional reserves relating to breast implant claims have been added since
June 30, 1994.
 
  The Company continually evaluates its reserves in light of developing
information and in light of discussions and negotiations with its insureds.
During 1997, the Company made payments of approximately $250 million with
respect to breast implant claims. These payments were included in previous
reserves and are consistent with the Company's belief that its reserves are
adequate. Significant uncertainties continue to exist with regard to the
ultimate outcome and cost of the Settlement and value of the opt-out claims.
While the Company is unable at this time to determine whether additional
reserves, which could have a material adverse effect upon the financial
condition, results of operations and cash flows of the Company, may be
necessary in
 
                                      11
<PAGE>
 
the future, the Company believes that its reserves for unpaid losses and loss
expenses including those arising from breast implant claims are adequate as at
September 30, 1997. See "Management's Discussion and Analysis of Results of
Operations and Financial Condition--Breast Implant Litigation" in the 1997
Annual Report to shareholders filed with this Form 10-K.
 
  After a claim is reported to the Company, a case reserve is established for
the estimated ultimate losses and loss expenses, if any, with respect to the
reported claim. The amount and timing of the reserve reflects the judgment of
the claims personnel based upon general corporate reserving practices and on
the experience and knowledge of the claims personnel (including, where
appropriate, outside counsel and claim consultants) regarding the nature and
value of the specific type of claim.
 
  The process in estimating ultimate liability employed by the Company is set
forth in an actuarial report (the "Actuarial Report") prepared annually by the
Company's Chief Actuary. The Company engages an independent actuarial firm to
review the Actuarial Report on an annual basis. As stated in its actuarial
review, such firm believed that the methods and assumptions contained in the
Actuarial Report were reasonable and appropriate for use in setting loss
reserves at September 30, 1997. Such Actuarial Report contains a number of
qualifications with respect to the complications and relative uncertainty that
exists in establishing reserves for the Company's lines of business, which
qualifications are substantially similar to those discussed above.
 
  Losses and loss expenses are charged to income as incurred. The reserve for
unpaid losses and loss expenses represents the estimated ultimate losses and
loss expenses less paid losses and loss expenses and is composed of case
reserves, loss expense reserves and IBNR loss reserves. During the loss
settlement period, which can be many years in duration, additional facts
regarding individual claims and trends often will become known. As these
become apparent, case reserves may be adjusted by allocation from the IBNR
loss reserve without any change in the overall reserve. In addition,
application of statistical and actuarial methods may require the adjustment of
the overall reserves upward or downward from time to time. The final liability
nonetheless may be significantly greater than or less than the prior
estimates.
 
  At September 30, 1997, the reserve for unpaid losses including IBNR loss
reserves was $1,834.8 million and the reserve for loss expenses was $35.2
million. The Company believes that its reserves for unpaid losses and loss
expenses including those arising from breast implant claims are adequate as of
September 30, 1997.
 
  The "Analysis of Loss and Loss Expense Development" shown on page 13
presents the subsequent development of the estimated year-end liability for
unpaid losses and loss expenses at the end of each of the years in the eleven-
year period ended September 30, 1997. The top line of the table shows the
estimated liability for unpaid losses and loss expenses recorded at the
balance sheet date for each of the indicated years. This liability represents
the estimated amount of losses and loss expenses for claims arising from all
prior years' policies and agreements that were unpaid at the balance sheet
date, including IBNR loss reserves. The upper (paid) portion of the table
presents the amounts paid as of subsequent years on those claims for which
reserves were carried as of each specified year. The lower portion of the
table shows the re-estimated amount of the previously recorded liability as of
the end of each succeeding year. Several aspects of the Company's operations,
including the low frequency and high severity of losses in the high excess
layers in which the Company provides insurance, complicate the actuarial
reserving techniques utilized by the Company. Accordingly, the Company expects
that ultimate losses and loss expenses attributable to any single underwriting
year will be either more or less than the incremental changes in the lower
portion of the following table. Management believes, however, that the losses
and loss expenses which have been recorded through September 30, 1997,
including those arising from breast implant claims, are adequate to cover the
ultimate cost of losses and loss expenses incurred through September 30, 1997
under the terms of the Company's policies and agreements. Since such
provisions are necessarily based on estimates, the ultimate losses and loss
expenses may be significantly greater or less than such amounts. See
"Management's Discussion and Analysis of Results of Operations and Financial
Condition--
 
                                      12
<PAGE>
 
Breast Implant Litigation" in the 1997 Annual Report to Shareholders filed with
this Form 10-K.
 
                 ANALYSIS OF LOSS AND LOSS EXPENSE DEVELOPMENT
 
<TABLE>
<CAPTION>
                                       YEAR ENDED SEPTEMBER 30,
                   ----------------------------------------------------------------
                     1987     1988       1989       1990        1991        1992
                   -------- ---------  ---------  ---------  ----------  ----------
                                            (IN THOUSANDS)
<S>                <C>      <C>        <C>        <C>        <C>         <C>
Unpaid...........  $  5,600 $  22,500  $  78,009  $ 319,230  $  470,832  $  813,849
Paid (Cumulative)
 As Of:
 1 year later....       167       431     26,190    181,525     149,493     340,836
 2 years later...       469     1,195     82,715    207,587     490,116     465,074
 3 years later...       672    21,307    108,689    531,502     590,847     517,366
 4 years later...       674    42,450    432,541    601,811     611,133     551,887
 5 years later...       674   182,110    459,183    622,097     627,691     881,198
 6 years later...       674   182,110    476,570    631,371     764,607
 7 years later...       674   195,939    484,549    641,060
 8 years later...       674   196,207    493,326
 9 years later...       674   196,861
 10 years later..       674

Liability Reestimated
As Of:
 End of year.....  $  5,600 $  22,500  $  78,009  $ 319,230  $  470,832  $  813,849
 1 year later....     5,463    57,682    267,674    475,647     706,960     813,849
 2 years later...    35,765   105,503    346,022    665,533     706,960   1,085,012
 3 years later...    19,901   134,227    516,783    665,533     874,368   1,234,462
 4 years later...    19,672   333,869    516,783    663,480     888,387   1,412,495
 5 years later...   139,674   333,869    487,911    680,119     940,513   1,666,770
 6 years later...   139,674   185,332    489,556    711,671   1,113,662
 7 years later...       674   176,889    479,306    768,935
 8 years later...       674   179,837    484,041
 9 years later...       674   177,624
 10 years later..       674
Cumulative
 redundancy/
 (deficiency)....     4,926  (155,124)  (406,032)  (449,705)   (642,830)   (852,921)

</TABLE>
<TABLE>
<CAPTION>
                                   YEAR ENDED SEPTEMBER 30,
                   --------------------------------------------------------
                      1993        1994        1995       1996       1997
                   ----------  ----------  ---------- ---------- ----------
                                        (IN THOUSANDS)
<S>                <C>         <C>         <C>        <C>        <C>
Unpaid...........  $  766,402  $1,176,215  $1,474,924 $1,836,113 $1,869,995
Paid (Cumulative)
 As Of:
 1 year later....     126,566      66,888      68,482    349,512
 2 years later...     183,439     121,628     402,368
 3 years later...     228,638     451,746
 4 years later...     558,625
 5 years later...
 6 years later...
 7 years later...
 8 years later...
 9 years later...
 10 years later..
Liability Reestimat
As Of:
 End of year.....  $  766,402  $1,176,215  $1,474,924 $1,836,113 $1,869,995
 1 year later....     966,402   1,177,292   1,474,924  1,836,113
 2 years later...   1,067,987   1,227,538   1,474,924
 3 years later...   1,211,424   1,386,571
 4 years later...   1,429,990
 5 years later...
 6 years later...
 7 years later...
 8 years later...
 9 years later...
 10 years later..
Cumulative
 redundancy/
 (deficiency)....    (663,588)   (210,356)          0          0          0

</TABLE>

  The Company does not consider it appropriate to extrapolate future
deficiencies or redundancies based upon the above tables, as conditions and
trends that have affected development of liability in the past may not
necessarily occur in the future.
 
  In 1994, the Company recorded an additional reserve of $200 million, related
primarily to developments in breast implant litigation, in respect of years
prior to 1994.
 
  In 1992, the Company began applying actuarial and statistical methods to
estimate ultimate expected losses and loss expenses for all of the Company's
business since inception. As at September 30, 1994 the Company changed its
method of allocating IBNR to accident and balance sheet years. This allocation
assigns IBNR to years based upon various risk factors including immaturity of
year, amount of earned premium in that year, and development of known claims.
As the Company's loss experience is characterized as low frequency, and high
severity, IBNR is considered a bulk reserve, and is therefore available for
loss development from whichever year it may arise. Prior to 1994, the
allocation of IBNR to accident and balance sheet years was based upon a loss
distribution indicated by the expected loss method employed by the Company.
Losses paid for the year ending September 30, 1988 include an amount of $24.9
million, which is expected to be recovered from an insured.
 
  It should be noted that as of November 1, 1993 the Company acquired CODA and
as of July 1, 1996 the Company acquired Tempest. However, the table has been
re-stated to include CODA's and Tempest's loss experience as if both companies
had been wholly owned subsidiaries of the Company from their inception.
 
                                       13
<PAGE>
 
  The "cumulative redundancy/(deficiency)" shown in the table represents the
aggregate change in the reserve estimates over all subsequent years. The
amounts noted are cumulative in nature; that is, an increase in loss estimate
for prior year losses generates a deficiency in each intermediate year. For
instance, a deficiency recognized in 1994 relating to losses incurred during
the year ending September 30, 1992 would be included in the cumulative
deficiency amount for each year from September 30, 1992 to the year the loss
was recognized (1994), yet the deficiency would be reflected in operating
results only in 1994. An analysis of the changes in aggregate reserves for
losses and loss expenses under GAAP is presented below. Since reserves are
necessarily based upon estimates, the ultimate net costs may vary from the
original estimates. As adjustments to these estimates become necessary, they
are reflected in current operations.
 
               RECONCILIATION OF UNPAID LOSSES AND LOSS EXPENSES
 
<TABLE>
<CAPTION>
                                                    YEAR ENDED SEPTEMBER 30,
                                                --------------------------------
                                                   1997       1996       1995
                                                ---------- ---------- ----------
                                                         (IN THOUSANDS)
   <S>                                          <C>        <C>        <C>
   Unpaid losses and loss expenses at
    beginning of year.........................  $1,836,113 $1,437,930 $1,160,392
   Unpaid losses and loss expenses assumed in
    respect of acquired companies.............         --      34,735        --
                                                ---------- ---------- ----------
                                                 1,836,113  1,472,665  1,160,392
                                                ---------- ---------- ----------
   Losses and loss expenses incurred in
    respect of losses occurring in:
     Current year.............................     435,941    464,824    350,653
     Prior years..............................         --         --         --
                                                ---------- ---------- ----------
       Total..................................     435,941    464,824    350,653
                                                ---------- ---------- ----------
   Losses and loss expenses paid in respect of
    losses occurring in:
     Current year.............................      52,547     39,567     14,394
     Prior years..............................     349,512     61,809     58,721
                                                ---------- ---------- ----------
       Total..................................     402,059    101,376     73,115
                                                ---------- ---------- ----------
   Unpaid losses and loss expenses at end of
    year......................................  $1,869,995 $1,836,113 $1,437,930
                                                ========== ========== ==========
</TABLE>
 
 Investments
 
  The Finance Committee of the Board of Directors is responsible for the
establishment of the Company's investment policy consistent with the Company's
strategies, goals and objectives. The investment policy is reviewed with, and
approved by, the Board of Directors.
 
  The Company's primary investment objectives are to ensure that funds will be
available to meet its insurance and reinsurance obligations and then, to
maximize its rate of return on invested funds within specifically approved
constraints as to credit quality, liquidity and volatility. Accordingly, the
Company's investment portfolio is invested primarily in fixed income
instruments of high credit quality.
 
  The Company has divided the consolidated investment portfolio into three
segments. Assets which are required to match and offset certain specifically
identified liabilities are segregated in an asset-liability management ("ALM")
segment. The second segment, the core portfolio, supports the current general
insurance exposures and is structured to have low to moderate investment risk.
The remainder of the portfolio, the discretionary segment, is invested to
enhance total return and return on equity by taking on additional investment
risks within prudent limits. The core and discretionary portfolios are managed
by professional outside managers whose performance is measured against certain
recognized broad market indices. Written investment guidelines,
 
                                      14
<PAGE>
 
approved by the Finance Committee, document standards to ensure portfolio
liquidity and diversification, maintain credit quality, and limit volatility
within approved asset allocation guidelines. The use of financial futures and
options contracts, as well as certain mortgage derivative securities which do
not provide a planned stable structure of principal and interest payments,
require prior approval from the Finance Committee.
 
  Funds are invested in both U.S. and non-U.S. dollar denominated high-quality
fixed maturity and equity securities. The approved asset allocation targets 20
percent of the consolidated investment portfolio to have an exposure to
equities, with international equities limited to no more than 35 percent of
total equities. This represents an increase from the period January 1995 to
May 1996, when the target equity allocation was 15 percent, with international
equities limited to no more than 20 percent of total equities. The remainder
of the consolidated portfolio is to be invested in fixed income securities.
Prior to the first quarter of fiscal 1995, total equity exposure was limited
to 10 percent of the consolidated investment portfolio.
 
  The fixed maturity portion of the Company's investment portfolio includes
U.S. and non-U.S. government obligations, corporate bonds, mortgage-backed
securities, and other investment grade securities. The Company's investment
guidelines do not permit investments in non-investment grade securities and
limit the total "BBB" exposure of the portfolio. To ensure diversity and limit
concentrations of credit risk, no more than 5 percent of the portfolio may be
invested in the obligations of any one issuer (other than the U.S.
government).
 
  Subsequent to September 30, 1997, the Company has made certain changes to
its investment guidelines. These changes include revising the asset allocation
targets to allow 5 percent of the consolidated investment portfolio to be
invested in alternative investments. The allocation to fixed income securities
will decrease from 80 percent to 75 percent. Also, the asset classes within
the fixed maturity portion of the investment portfolio have been extended to
include a 5 percent allocation to convertible bonds and a 5 percent allocation
to high yield bonds with a minimum credit quality of "B'.
 
  Those fixed income investment managers with authorization to invest a
portion of their portfolios in non-U.S. dollar securities are required to
hedge a minimum of 75 percent of their total non-U.S. dollar exposure.
Previously, currency hedging of fixed income securities was permitted at the
discretion of the manager.
 
  Applicable insurance laws and regulations do not restrict the Company's
investments except that certain types of investments (such as unquoted equity
securities, investments in affiliates, real estate and collateral loans) may
not qualify as a "relevant asset" for purposes of satisfying Bermuda statutory
requirements. See "Regulation--Bermuda."
 
  For additional information regarding the investment portfolio, including
breakdowns of the sector and maturity distributions, see note 4 to the
consolidated financial statements included in the 1997 Annual Report to
Shareholders.
 
 Regulation
 
  Bermuda
 
  The businesses of ACE Insurance, CODA and Tempest are regulated by the
Insurance Act 1978 (as amended by the Insurance Amendment Act 1995) and
related regulations (the "Act"). The Act imposes on Bermuda insurance
companies solvency and liquidity standards and auditing and reporting
requirements and grants the Minister of Finance (the "Minister") powers to
supervise, investigate and intervene in the affairs of insurance companies.
The Act provides for four classes of insurance company. ACE Insurance and
Tempest have been designated as Class 4 insurers, which is the designation for
the largest companies requiring capital and surplus in excess of $100 million.
CODA has been designated a Class 3 insurer requiring capital and surplus in
excess of $1 million. Each registered insurer must appoint an independent
auditor to audit and report on the Statutory Financial Statements and
Statutory Financial Return on an annual basis. The independent auditor must be
approved by the Minister. Each Class 3 and Class 4 insurer must appoint a loss
reserve specialist, who must also be approved by the Minister, to review and
report on the loss reserves of the insurer on an annual basis.
 
                                      15
<PAGE>
 
Class 3 and Class 4 companies are required to file their Statutory Financial
Return and Statutory Financial Statements with the Registrar of Companies in
Bermuda (the "Registrar"), who is the chief administrative officer under the
Act, no later than four months from the insurer's fiscal year end. The
Statutory Financial Return includes, among other matters, the report of the
approved independent auditor; the actuarial opinion on loss reserves prepared
by the approved loss reserve specialist; a declaration of statutory ratios; and
a solvency certificate. Both the declaration of statutory ratios and the
solvency certificate must be signed by at least two directors of the insurer.
 
  United Kingdom
 
  London Representative Office
 
  The Company has established for marketing purposes, a representative office
in London, England. However, all underwriting operations continue to be
conducted in Bermuda.
 
  Lloyd's
 
  The Company and certain of its UK subsidiaries are subject to the regulatory
jurisdiction of the Council of Lloyd's (the "Council") as a result of the
acquisitions by the Company of Methuen and ACE London and the establishment of
ACE Capital Limited ("ACE Capital"), a UK limited liability corporate member of
Lloyd's formed in connection with the Methuen acquisition. In addition, the
Company has acquired three other UK limited liability corporate Member's of
Lloyd's, ACE Capital II Limited (formerly Ockham London Limited); ACE Capital
III Limited (formerly ZIC Lloyd's Underwriting Limited and ACE Staff Corporate
Member Limited (a vehicle to facilitate staff participation on managed
Syndicates). Unlike other financial markets in the UK, Lloyd's is not subject
to direct UK government regulation through the UK Financial Services Act 1986
but, instead, is self regulating by virtue of the Lloyd's Act 1971-1982 through
bye-laws, regulations and codes of conduct made by the Council, which governs
the market. Under the Council there are two Boards, the Market Board and the
Regulatory Board. The former is led by working members of the Council and is
responsible for strategy and the provision of services such as premium and
claims handling, accounting and policy signing. The Regulatory Board is
responsible for the regulation of the market, compliance and the protection of
policyholders. Under the regulations, the approval of Council has to be
obtained before any person can be a "controller" of a corporate member or a
managing agency. The Company has been approved as a "controller".
 
  Lloyd's imposes an absolute prohibition on any company being a 10% controller
of a corporate member without first notifying Lloyd's and receiving their
consent. This prohibition is qualified in respect of becoming a 20%, 33%, 50%
or majority controller in that the corporate member must do all that lies
within its powers to comply with Lloyd's requirements. In these latter
circumstances, this essentially means that notice must have been given to the
Council that the relevant threshold will be exceeded and the Council has not
objected. Persons seeking to become controllers may be required to deliver a
declaration and undertaking to Lloyd's, in the form prescribed by Lloyd's,
unless Lloyd's exempts such person from this requirement. As a "controller",
the company is required to give certain undertakings, directed principally
towards ensuring that there is no direct interference in the conduct of the
business of the managing agency, but there are no provisions in the Lloyd's
Acts, the byelaws or the regulations which provide for any liabilities of ACE's
Corporate Members, Methuen or ACE London to be met by the Company. In addition,
a managing agency is required to comply with various capital and solvency
requirements, and to submit to regular monitoring and compliance procedures.
ACE Capital and ACE Staff Corporate Member Limited, as corporate members of
Lloyd's, are each required to commit an amount broadly equal to 50 percent of
their underwriting capacity on the syndicates to support their underwriting on
those syndicates.
 
  In the case of ACE Capital III Limited, this percentage is about 80 percent
by virtue of it only participating on one syndicate. ACE Capital II Limited
will not be underwriting for the 1998 year of account, its capacity having been
transferred to ACE Capital and ACE Staff Corporate Member Limited.
 
                                       16
<PAGE>
 
  Under English law, if any person that holds or subsequently becomes the
holder of more than 5 percent of the Company's stock also owns any interest in
a Lloyd's broker or is a partner or a director of a Lloyd's broker, that
Lloyd's broker risks losing its Lloyd's license. For these purposes "Lloyd's
broker" includes the holding company of a corporate Lloyd's broker, any company
which controls (a test based on one-third voting rights or control of the
board) such a Lloyd's broker or its holding company or if the Lloyd's broker is
a partnership any person who controls (on a similar test) such a Lloyd's broker
or one of its partners.
 
  United States of America
 
  The Company and its insurance subsidiaries, excluding its Lloyd's operations,
are not admitted to do business as insurers in any jurisdiction in the U.S.
Each state in the U.S. licenses insurers and prohibits, with some exceptions,
the sale of insurance products by non-admitted insurers within their applicable
jurisdictions.
 
  The Company conducts its insurance business from its offices in Bermuda. All
of the Company's insurance clients are obtained through non-U.S. insurance
brokers and non-U.S. affiliates of U.S. insurance brokers. All insurance
policies are issued and delivered and premiums are received in Bermuda. Based
on, among other things, the foregoing, the Company does not believe it is in
violation of the insurance laws of any state in the U.S.
 
  Many states impose a premium tax (typically 2 percent to 4 percent of gross
premiums) on insureds obtaining insurance from nonadmitted foreign insurers,
such as ACE Insurance and CODA. The premiums charged by the Company do not
include any American state premium tax. Each insured is responsible for
determining whether it is subject to any such tax and for paying such tax as
may be due.
 
  The U.S. also imposes on policyholders an excise tax on insurance and
reinsurance premiums paid to foreign insurers or reinsurers with respect to
risks located in the United States. The rates of tax applicable to premiums
paid to ACE Insurance and CODA are 4 percent for insurance premiums and 1
percent for reinsurance premiums.
 
  The Company has from time to time received inquiries from certain U.S. state
insurance regulators regarding the Company's activities in a particular
jurisdiction. To date only the State of Nevada Department of Insurance has
formally challenged the insurance activities of the Company and that challenge
was resolved in favor of the Company by legislation. There can be no assurance
that additional challenges will not be raised in the future or that the Company
will be able to successfully defend against such challenges. Such challenges
may arise, among other things, in connection with actions seeking the payment
of state premium taxes from insureds.
 
  In the event that the Company is not able to successfully defend against
challenges by certain U.S. jurisdictions, the Company's business could be
adversely affected in the short term. However, should this occur, the Company
could elect to qualify as a surplus lines insurer in such U.S. jurisdictions as
were necessary. Were it necessary to do so, the Company believes that generally
it could meet and comply with the prescribed legislative requirements, and such
compliance would not have a material impact on the ability of the Company to
conduct its business or its results of operations.
 
  If the Company is unable to defend successfully against challenges of U.S.
jurisdiction, it is possible that a policyholder could attempt to sue the
Company in a U.S. court. The Company's primary defense to such action is that
it's policies have a mandatory arbitration clause for coverage disputes. Courts
in some states can impose damages in excess of policy limits if an insurer is
found to have improperly and in bad faith declined coverage. If a U.S. court
took jurisdiction of such a claim, it is possible that the Company's exposure
could be significantly greater than policy limits. It is also possible that an
arbitration panel, if the issues were properly presented, could make an extra-
contractual award for bad faith damage.
 
  There can be no assurance that new or additional legislation will not be
proposed and enacted that has the effect of subjecting the Company to
regulation in the U.S.
 
                                       17
<PAGE>
 
  As previously discussed, on September 18, 1997, the Company executed a
definitive agreement for the acquisition of WSG. WSG and its subsidiaries are
U.S. companies subject to regulation in the U.S. This position will not change
following the closing of the acquisition.
 
 Tax Matters
 
  United States of America
 
  Corporate Income Tax
 
  ACE is a Cayman Islands corporation and has never paid U.S. corporate income
taxes (other than withholding taxes on dividend income) on the basis that it is
not engaged in a trade or business in the U.S.; however, there can be no
assurance that the Internal Revenue Service ("IRS") will not contend to the
contrary. If the Company were subject to U.S. income tax, there could be a
material adverse effect on the Company's shareholders' equity and earnings. The
Company and its Bermuda-based insurance and reinsurance subsidiaries do not
file U.S. income tax returns reporting income subject to U.S. income tax since
they do not conduct business within the U.S. except that the Company and its
Bermuda-based insurance and reinsurance subsidiaries have filed protective tax
returns reporting no U.S. income to preserve their ability to deduct their
ordinary and necessary business expenses should the IRS successfully challenge
the Company's contention that none of its income is subject to a net income tax
in the U.S.
 
  As previously discussed, on September 18, 1997, the Company executed a
definitive agreement for the acquisition of WSG. WSG and its subsidiaries are
U.S. companies subject to U.S. corporate income tax. This position will not
change following the closing of the acquisitions.
 
  Related Person Insurance Income
 
  Each U.S. person who beneficially owns Ordinary Shares of the Company
(directly or through foreign entities) on the last day of an insurance company
subsidiary's fiscal year will have to include in such person's gross income for
U.S. tax purposes a proportionate share (determined as described herein) of the
related person insurance income ("RPII") of such insurance company subsidiary
if the RPII of such insurance company subsidiary, determined on a gross basis,
is 20 percent or more of that insurance company subsidiary's gross insurance
income in such fiscal year. RPII is income attributable to insurance policies
where the direct or indirect insureds are U.S. shareholders or are related to
U.S. shareholders of the Company. RPII may be includible in a U.S.
shareholder's gross income for U.S. tax purposes regardless of whether or not
such shareholder is an insured. For the fiscal year ended September 30, 1997,
the Company believes that gross RPII of each of its insurance company
subsidiaries was below 20 percent for the year. Although no assurances can be
given, the Company anticipates that gross RPII of each of its insurance company
subsidiaries will be less than 20 percent of each such subsidiary's gross
insurance income for subsequent years and the Company will endeavor to take
such steps as it determines to be reasonable to cause its gross RPII to remain
below such level.
 
  The RPII provisions of the Internal Revenue Code of 1986, as amended (the
"Code"), have never been interpreted by the courts. Regulations interpreting
the RPII provisions of the Code exist only in proposed form, having been
proposed on April 16, 1991. It is not certain whether these regulations will be
adopted in their proposed form or what changes or clarifications might
ultimately be made thereto or whether any such changes, as well as any
interpretation or application of RPII by the IRS, the courts, or otherwise,
might have retroactive effect. For a more detailed discussion of RPII and other
tax matters pertaining to an investment in the Company's shares, reference is
hereby made to the section entitled "Taxation of Ace and its Shareholders" in
the Company's Registration Statement on Form S-4 (No. 333-04153), which section
is incorporated by reference herein.
 
  United Kingdom
 
  Lloyd's is required to pay U.S. income tax on U.S. connected income ("U.S.
income") written by Lloyd's syndicates. Lloyd's has a closing agreement with
the IRS whereby the amount of tax due on this business is calculated by Lloyd's
and remitted directly to the IRS. These amounts are then charged to the
personal accounts
 
                                       18
<PAGE>
 
of the Names in proportion to their participation in the relevant syndicates.
ACE Capital is subject to this arrangement but, as a UK domiciled company, will
receive UK corporation tax credits for any U.S. income tax incurred up to the
value of the equivalent UK corporation income tax charge on the U.S. income.
 
  ACE UK Limited, Methuen and ACE London, as well as ACE Capital and ACE London
Ltd., the Lloyd's corporate members participating in the syndicates managed by
MUL, ALA and ALU, are subject to UK corporation tax and value added tax.
 
  Although the Company has a representative office in London, it has been
advised that it is not deemed to be doing insurance business in the UK and
therefore is subject only to minimal tax in the UK.
 
  With effect from October 1, 1994, the UK imposed an insurance premium tax on
that portion of policies related to certain UK risks. ACE has registered to
collect and pay this tax on behalf of UK domiciled policyholders.
 
  Bermuda
 
  Under current Bermuda law, the Company and its Bermuda subsidiaries are not
required to pay any taxes on its income or capital gains. The Company has
received an undertaking from the Minister of Finance in Bermuda that, in the
event of any taxes being imposed, the Company will be exempt from taxation in
Bermuda until March 2016.
 
  Cayman Islands
 
  Under current Cayman Islands law, the Company is not required to pay any
taxes on its income or capital gains. The Company has received an undertaking
that, in the event of any taxes being imposed, the Company will be exempted
from taxation in the Cayman Islands until the year 2013.
 
 Employees
 
  At September 30, 1997, the Company employed a total of 382 persons, 140 of
whom were located in Bermuda and 242 in London. Of the 140 persons employed in
Bermuda, 14 are employed by Tempest. Of the 242 persons employed in London, 238
are employed by Methuen and ACE London. None of these employees is represented
by a labor union.
 
                                       19
<PAGE>
 
                      GLOSSARY OF SELECTED INSURANCE TERMS
 
Catastrophe Excess of Loss Reinsurance.. Catastrophe excess of loss reinsur-
                                         ance provides coverage to a primary
                                         insurer when aggregate claims and
                                         claim expenses from a single occur-
                                         rence of a peril covered under a
                                         portfolio of primary insurance con-
                                         tracts written by the insurer exceed
                                         the attachment point specified in the
                                         reinsurance contract with the insur-
                                         er.
 
Claims made form........................ Insurance coverage which is dependent
                                         upon the filing of a claim, which
                                         must normally fall within the policy
                                         period.
 
IBNR loss reserves...................... The reserves included in the
                                         Company's financial statements under
                                         the caption "Unpaid Losses and Loss
                                         Expenses" for the estimated ultimate
                                         unpaid liability which the Company
                                         has incurred under the terms of the
                                         Company's policies and agreements,
                                         less case reserves.
 
Integrated occurrence................... All losses attributable directly or
                                         indirectly to the same event, condi-
                                         tion, cause, defect or hazard or
                                         failure to warn of such which are
                                         added together and treated as one oc-
                                         currence under an insured's policy.
 
Occurrence first reported............... Manuscripted form of stand-alone in-
                                         surance coverage offered by the Com-
                                         pany, which generally ties the limits
                                         available and other policy terms to
                                         the date on which an occurrence is
                                         first reported to the Company.
 
Proportional Property Reinsurance....... Proportional property reinsurance
                                         treaties assume a specified percent-
                                         age of the risk exposure under a
                                         portfolio of primary insurance con-
                                         tracts written by the ceding insurer
                                         and receive an equal percentage of
                                         the premium received by the ceding
                                         insurer.
 
Risk Excess of Loss Reinsurance......... Property per risk excess of loss re-
                                         insurance responds to a loss of the
                                         reinsured in excess of its retention
                                         level on a single "risk", rather than
                                         to aggregate losses for all covered
                                         risks. A risk in this context might
                                         mean the insurance coverage on one
                                         building or a group of buildings.
 
Stand alone basis....................... A term referring to an insurance pol-
                                         icy which is governed by its own
                                         terms, conditions, exclusions and re-
                                         tention and does not incorporate the
                                         terms, conditions or exclusions of
                                         underlying policies.
 
                                       20
<PAGE>
 
ITEM 2. PROPERTIES
 
  The Company leases office space in Hamilton, Bermuda for its principal
offices. The lessor is a joint venture in which the Company has a 40 percent
interest and there is an agreement with the joint venture partner which ensures
the Company's ability to occupy a portion of the building until 2011. Tempest
also leases office space in Hamilton, Bermuda for its principle offices under a
non-cancelable lease expiring in 1998 with a three year renewal option. Methuen
currently leases office space at 122 Leadenhall Street, London, England for its
principal offices. The lease expires in 2012. Methuen also leases an office in
the 1986 Lloyd's Building in London under a lease that expires in 2001. ACE
London leases office space at Devonshire Square, London, England for its
principal offices under two leases that expire in 2008. Subsequent to year end
the Company consolidated the operations of Methuen and ACE London into one
location in London, England. The lease for this office space expires in 2012.
 
  In April, 1997, the Company purchased a block of land in Hamilton, Bermuda
and plans to develop the property to satisfy future office space requirements.
 
ITEM 3. LEGAL PROCEEDINGS
 
  The Company, in common with the insurance industry in general, is subject to
litigation in the normal course of its business. Although the Company's
policies generally provide for resolution of disputes by arbitration in Bermuda
or London, the Company has been sued by insureds several times in the United
States and, with one exception which is currently on appeal, has been
successful in either being dismissed from such suits or in having such suits
dismissed on procedural grounds or stayed pending the results of arbitration.
In addition, the Company is occasionally named as a party in Louisiana "direct
action" suits by insureds. The Company has sought dismissal of these actions as
well and decisions are pending in these actions. At September 30, 1997, the
Company was not a party to any material litigation other than as encountered in
claims activity and none of such litigation is expected by management to have a
materially adverse effect on the Company's financial condition.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
  No matters were submitted to a vote of stockholders during the fourth quarter
of the fiscal year covered by this report.
 
                       EXECUTIVE OFFICERS OF THE COMPANY
 
  The table below sets forth the names, ages, positions and business experience
of the executive officers of the Company.
 
<TABLE>
<CAPTION>
       NAME      AGE                          POSITION
       ----      ---                          --------
   <S>           <C> <C>
   Brian         50  Chairman, President and Chief Executive Officer & Director
    Duperreault
   Donald        60  Vice Chairman and Director; President and Chief Executive
    Kramer            Officer of Tempest Reinsurance Company Limited
   Dominic J.    44  President of A.C.E. Insurance Company, Ltd.
    Frederico
   William J.    58  Chairman of ACE UK Limited
    Loschert
    (1)
   Christopher   41  Chief Financial Officer
    Z. Marshall
    (1)
   Peter N.      53  General Counsel & Secretary
    Mear (1)
   John C.       50  Chief Actuary
    Burville
    (1)
   Robin J.W.    42  Chief Investment Officer
    Masters (1)
   Keith P.      54  Chief Administration Officer
    White (1)
</TABLE>
- --------
(1) In July 1997, as part of a group restructuring plan, certain corporate
    titles were amended.
 
                                       21
<PAGE>
 
  Brian Duperreault has served as Chairman, President and Chief Executive
Officer and as a director of the Company since October 1994. Mr. Duperreault
joined AIG in 1973 and served in various senior executive positions with AIG
from 1978 until September 1994, most recently as Executive Vice President,
Foreign General Insurance and concurrently as Chairman and Chief Executive
Officer of American International Underwriters, from April 1994 to September
1994. Mr. Duperreault was President of American International Underwriters, an
affiliate of AIG, from 1991 to 1994, and Chief Executive Officer of AIG
companies in Japan and Korea, from 1989 until 1991.
 
  Donald Kramer has served as Vice Chairman and a director of the Company and
Chairman and Chief Executive Officer of Tempest since July 1996. Mr. Kramer
previously served as Chairman of Tempest and was instrumental in the formation
of Tempest in September 1993. Mr. Kramer was previously Chief Executive Officer
of Kramer Capital Corp., National American Insurance Company of California and
was the founder and Chairman of NAC Re Corp. where he served until his
retirement in June 1993.
 
  Dominic J. Frederico has served as President of A.C.E. Insurance Company,
Ltd. since July 1997. Mr. Frederico previously served as Executive Vice
President, Underwriting since December 1, 1996, and as Executive Vice
President, Financial Lines from January 1995 to December 1, 1996. Mr. Frederico
served in various capacities at AIG in Europe and the U.S. from 1982 to January
1995, most recently as Senior Vice President and Chief Financial Officer of an
AIG subsidiary, with multi-regional general management responsibilities.
 
  William J. Loschert was appointed as Chairman of ACE UK Limited with effect
from December 1996 to oversee the Company's insurance operations at Lloyd's.
Mr. Loschert previously served as Executive Vice President, Underwriting of the
Company since January 1986.
 
  Christopher Z. Marshall has served as Chief Financial Officer of the Company
since November 1992 and as Senior Vice President, Finance of the Company from
January 1990 to November 1992.
 
  Peter N. Mear has served as General Counsel and Secretary of the Company
since April 1996. Mr. Mear served as Vice President and Claims Counsel of Aetna
Casualty and Surety Company from February 1991 to April 1996 and Counsel and
Litigation Section Head of Aetna Life & Casualty from September 1977 to
February 1991.
 
  John C. Burville has served as Chief Actuary of the Company since January
1992. Mr. Burville served as managing actuarial consultant with Tillinghast,
Nelson & Warren (Bermuda) Ltd. (management consulting and actuaries) from March
1986 to December 1991.
 
  Robin J. W. Masters has served as Chief Investment Officer since July 1997.
Ms. Masters previously served as Senior Vice President since February 1995 and
as Treasurer of the Company since October 1992.
 
  Keith P. White has served as Chief Administration Officer since July 1997.
Mr. White previously served as Senior Vice President, Administration of the
Company since January 1990.
 
                                    PART II
 
ITEM 5. MARKET FOR THE REGISTRANT'S ORDINARY SHARES AND RELATED STOCKHOLDER
MATTERS
 
  (a) The Company's Ordinary Shares, par value $0.125 per share, have been
listed on the New York Stock Exchange since March 25, 1993, under the symbol
ACL.
 
  The following table sets forth the high and low closing sales prices of the
Company's Ordinary Shares per fiscal quarters, as reported on the New York
Stock Exchange Composite Tape for the periods indicated.
 
<TABLE>
<CAPTION>
                                                      FISCAL 1997   FISCAL 1996
                                                     ------------- -------------
                                                      HIGH   LOW    HIGH   LOW
                                                     ------ ------ ------ ------
      <S>                                            <C>    <C>    <C>    <C>
      First Quarter................................. 60 1/8 52 3/8 39 3/4 33
      Second Quarter................................ 66 1/4 56 5/8 48 3/4 38
      Third Quarter................................. 74 5/8 58 1/4 49 1/4 41 3/4
      Fourth Quarter................................ 96 1/2 73 1/2 52 7/8 41 3/4
</TABLE>
 
 
                                       22
<PAGE>
 
  The last reported sale price of the Ordinary Shares on the New York Stock
Exchange Composite Tape on December 16, 1997 was $91 3/16.
 
  (b) The approximate number of record holders of Ordinary Shares as of
December 16, 1997 was 297.
 
  (c) The Company paid quarterly dividends of $0.18 per share to shareholders
of record on December 29, 1996 and March 31, 1997, and quarterly dividends of
$0.22 per share to all shareholders of record on June 30, 1997 and September
30, 1997. On November 13, 1997 the Company declared a quarterly dividend of
$0.24 per Ordinary Share, payable on January 16, 1998 to shareholders of
record on December 13, 1997.
 
  On November 13, 1997, the Company approved a three-for-one split of the
Company's stock. The stock split is subject to approval by ACE shareholders
and it is expected that the stock split will be voted on at the Annual General
Meeting of shareholders to be held on February 6, 1998.
 
  During 1997, the Company repurchased 3,031,000 Ordinary Shares under share
repurchase programs for an aggregate cost of $182.6 million. On May 9, 1997,
the Board of Directors authorized a new program for up to $300.0 million of
the Company's Ordinary Shares. This program superceded and replaced the
balance of the February 7, 1997 authorization. At September 30, 1997,
approximately $268.0 million of the Board authorization had not been utilized.
During 1996 the Company repurchased 1,268,000 Ordinary Shares under share
repurchase programs for an aggregate cost of $57.8 million.
 
  ACE is a holding company whose principal source of income is investment
income and dividends from its operating subsidiaries. The ability of the
operating subsidiaries to pay dividends to ACE and the Company's ability to
pay dividends to its shareholders are each subject to legal and regulatory
restrictions. The declaration and payment of future dividends will be at the
discretion of the Board of Directors and will be dependent upon the profits
and financial requirements of the Company and other factors, including legal
restrictions on the payment of dividends and such other factors as the Board
of Directors deems relevant. See "Management's Discussion and Analysis of
Results of Operations and Financial Condition--Liquidity and Capital
Resources" in the 1997 Annual Report to Shareholders filed with this Form 10-
K.
 
ITEM 6. SELECTED FINANCIAL DATA
 
  Selected financial data for the five years ended September 30, 1997 is
incorporated by reference to page 20 of the 1997 Annual Report to Shareholders
filed with this Form 10-K.
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND
FINANCIAL CONDITION
 
  This item is incorporated by reference to pages 21 through 31 of the 1997
Annual Report to Shareholders filed with this Form 10-K.
 
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
 
  This item is incorporated by reference to page 30 of the 1997 Annual Report
to Shareholders filed with this Form 10-K.
 
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
  This item is incorporated by reference to pages 32 through 54 of the 1997
Annual Report to Shareholders filed with this Form 10-K.
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE
 
  There have been no changes in nor any disagreements with accountants on
accounting and financial disclosure within the 24 months ended September 30,
1997.
 
                                      23
<PAGE>
 
                                    PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
  This item is incorporated by reference to the sections entitled "Election of
Directors--Nominees for Election to Terms Expiring in 1999", "Election of
Directors--Nominees for Election to Terms Expiring in 2000" and "--Directors
Whose Terms of Office Will Continue After This Meeting" of the definitive proxy
statement for the Annual General Meeting of Shareholders to be held on February
6, 1998, which involves the election of directors and will be filed with the
Securities and Exchange Commission not later than 120 days after the close of
the fiscal year pursuant to regulation 14A.
 
ITEM 11. EXECUTIVE COMPENSATION
 
  This item is incorporated by reference to the section entitled "Executive
Compensation" of the definitive proxy statement for the Annual General Meeting
of Shareholders to be held on February 6, 1998, which will be filed with the
Securities and Exchange Commission not later than 120 days after the close of
the fiscal year pursuant to regulation 14A.
 
ITEM 12. SECURITY OWNERSHIP AND CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
  This item is incorporated by reference to the section entitled "Beneficial
Ownership of Ordinary Shares" of the definitive proxy statement for the Annual
General Meeting of Shareholders to be held on February 6, 1998, which will be
filed with the Securities and Exchange Commission not later than 120 days after
the close of the fiscal year pursuant to regulation 14A.
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
  This item is incorporated by reference to the section entitled "Election of
Directors--Certain Business Relationships" of the definitive proxy statement
for the Annual General Meeting of Shareholders to be held on February 6, 1998,
which will be filed with the Securities and Exchange Commission not later than
120 days after the close of the fiscal year pursuant to regulation 14A.
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENTS, SCHEDULES AND REPORTS ON FORM 8-K
 
  (a) FINANCIAL STATEMENTS, SCHEDULES AND EXHIBITS
 
    1. Financial Statements
 
      The following is a list of financial statements filed as part of
      this Report, all of which have been incorporated by reference to the
      material in the 1997 Annual Report to Shareholders as described
      under item 8 of this Report
 
              --Report of Independent Accountants
              --Consolidated Balance Sheets at September 30, 1997 and 1996
              --Consolidated Statements of Operations for the years ended
               September 30, 1997, 1996 and 1995
              --Consolidated Statements of Shareholders' Equity for the years
               ended September 30, 1997, 1996 and 1995
              --Consolidated Statements of Cash Flows for the years ended
               September 30, 1997, 1996 and 1995
              --Notes to Consolidated Financial Statements.
 
                                       24
<PAGE>
 
    2. Financial Statement Schedules
 
      Included in Part IV of this report.
 
<TABLE>
<CAPTION>
                                                                  SCHEDULE
                                                                   NUMBER  PAGE
                                                                  -------- ----
         <S>                                                      <C>      <C>
         --Report of Independent Accountants on financial
          statement schedules included in Form 10-K                         28
         --Summary of Investments                                     I     29
         --Condensed financial information of the Registrant as
          of September 30, 1997 and 1996, and for the years
          ended September 30, 1997, 1996 and 1995                    II     30
         --Supplemental information concerning Property/Casualty
          Insurance Operations                                       VI     33
</TABLE>
 
  Other schedules have been omitted as they are not applicable to the Company,
or the required information has been included in the financial statements and
related notes.
 
    3. Exhibits
 
<TABLE>
     <C>     <S>
      2.1    Agreement and Plan of Amalgamation, dated as of March 14, 1996, by
             and among ACE Limited, TRCL Acquisition Limited and Tempest Rein-
             surance Company Limited (incorporated by reference to Exhibit 2.1
             to Form S-4 of the Company (No. 333-04153)
      2.2    Stock Purchase Agreement, dated September 18, 1997 by and between
             ACE Limited and Talegen Holdings, Inc.
      2.3    Tax Allocation and Indemnification Agreement, dated September 18,
             1997 by and among Xerox Financial Services, Inc., Talegen Hold-
             ings, Inc., Westchester Specialty Group, Inc., and ACE Limited.
      3.1    Memorandum of Association of the Company, (incorporated by refer-
             ence to Exhibit 3.1 to the Registration Statement on Form S-1 of
             the Company (No. 33-57206)).
      3.2    Articles of Association of the Company, (incorporated by reference
             to Exhibit 3.2 to the Registration Statement on Form S-1 of the
             Company (No. 33-57206)).
      4.1    Memorandum of Association of the Company (see Exhibit 3.1).
      4.2    Articles of Association of the Company (see Exhibit 3.2).
      4.3    Specimen certificate representing Ordinary Shares, (incorporated
             by reference to Exhibit 3.1 to the Registration Statement on Form
             S-1 of the Company (No. 33-57206)).
     10.1*   Employment Agreement dated December 23, 1985, between ACE Limited,
             A.C.E. Insurance Company Ltd., and William J. Loschert, (incorpo-
             rated by reference to Exhibit 10.8 to the Registration Statement
             on Form S-1 of the Company (No. 33-57206)).
     10.2*   Employment Agreement dated January 1, 1986, between ACE Limited,
             A.C.E. Insurance Company Ltd., and Christopher Z. Marshall, (in-
             corporated by reference to Exhibit 10.9 to the Registration State-
             ment on Form S-1 of the Company (No. 33-57206)).
     10.3*   ACE Limited Annual Performance Incentive Plan, (incorporated by
             reference to Exhibit 10.13 to the Registration Statement on Form
             S-1 of the Company (No. 33-57206)).
     10.4*   ACE Limited Equity Linked Incentive Plan, (incorporated by refer-
             ence to Exhibit 10.14 to the Registration Statement on Form S-1 of
             the Company (No. 33-57206)).
     10.5*   Amendment to ACE Limited Equity Linked Incentive Plan, (incorpo-
             rated by reference to Exhibit 10.15 to the Registration Statement
             on Form S-1 of the Company (No. 33-57206)).
     10.6*   ACE Limited Employee Retirement Plan, (incorporated by reference
             to Exhibit 10.21 to the Registration Statement on Form S-1 of the
             Company (No. 33-57206)).
</TABLE>
 
 
                                       25
<PAGE>
 
<TABLE>
     <C>     <S>
     10.7*   First Amendment to ACE Limited Employee Retirement Plan, (incorpo-
             rated by reference to Exhibit 10.22 to the Registration Statement
             on Form S-1 of the Company (No. 33-57206)).
     10.8*   Second Amendment to ACE Limited Employee Retirement Plan, (incor-
             porated by reference to Exhibit 10.23 to the Registration State-
             ment on Form S-1 of the Company (No. 33-57206)).
     10.9*   Third Amendment to ACE Limited Employee Retirement Plan, (incorpo-
             rated by reference to Exhibit 10.24 to the Registration Statement
             on Form S-1 of the Company (No. 33-57206)).
     10.10*  ACE Limited Supplement Retirement Plan, (incorporated by reference
             to Exhibit 10.25 to the Registration Statement on Form S-1 of the
             Company (No. 33-57206)).
     10.11*  First Amendment to ACE Limited Supplement Retirement Plan, (incor-
             porated by reference to Exhibit 10.26 to the Registration State-
             ment on Form S-1 of the Company (No. 33-57206)).
     10.12*  Second Amendment to ACE Limited Supplement Retirement Plan, (in-
             corporated by reference to Exhibit 10.27 to the Registration
             Statement on Form S-1 of the Company (No. 33-57206)).
     10.13*  Form of restricted stock award dated August 24, 1993 to ACE Lim-
             ited Directors, (incorporated by reference to Exhibit 10.39 to
             Form 10-K of the Company for the year ended September 30, 1993).
     10.14*  Employment Agreement, dated October 1, 1994, between ACE Limited
             and Brian Duperreault (incorporated by reference to Exhibit 10.42
             to Form 10-K of the Company for the year ended September 30,
             1994).
     10.15*  Option and Restricted Share Agreement, dated October 1, 1994, be-
             tween ACE Limited and Brian Duperreault (incorporated by reference
             to Exhibit 10.43 to Form 10-K of the Company for the year ended
             September 30, 1994).
     10.16*  Consulting Agreement, effective October 1, 1994, between ACE Lim-
             ited and Walter A. Scott (incorporated by reference to Exhibit
             10.44 to Form 10-K of the Company for the year ended September 30,
             1994).
     10.17*  Employment Agreement, dated January 9, 1995, between ACE Limited
             and Dominic J. Frederico (incorporated by reference to Exhibit
             10.45 to Form 10-K of the Company for the year ended September 30,
             1995).
     10.18*  Second amendment to ACE Limited Equity Linked Incentive Plan (in-
             corporated by reference to Exhibit 10.45 to Form 10-K of the Com-
             pany for the year ended September 30, 1995).
     10.20*  Employment Agreement, dated April 1, 1996, between ACE Limited and
             Peter N. Mear (incorporated by reference to Exhibit 10.48 to Form
             10-Q of the Company for the quarter ended June 30, 1996).
     10.21*  ACE Limited 1995 Long Term Incentive Plan (incorporated by refer-
             ence to Exhibit 10.35 to Form 10-Q of the Company for the quarter
             ended March 31, 1996).
     10.22*  Employee Stock Purchase Plan (incorporated by reference to Exhibit
             10.36 to Form 10-Q of the Company for the quarter ended March 31,
             1996).
     10.23*  1995 Outside Directors Plan (incorporated by reference to Exhibit
             10.37 to Form 10-Q of the Company for the quarter ended March 31,
             1996).
     10.24*  ACE Limited 1996 Tempest Replacement Option Plan (incorporated by
             reference to Exhibit 10.24 to Form 10-K of the Company for the
             year ended September 30, 1996).
</TABLE>
 
 
                                       26
<PAGE>
 
<TABLE>
     <C>     <S>
     10.25   Credit Agreement between the Company and a syndicate of banks
             dated November 15, 1996 (incorporated by reference to Exhibit
             10.25 to Form 10-K of the Company for the year ended September 30,
             1996).
     10.26   Reimbursement Agreement and Pledge Agreement between the Company
             and a syndicate of banks dated November 22, 1996 (incorporated by
             reference to Exhibit 10.26 to Form
             10-K of the Company for the year ended September 30, 1996).
     10.27*  First Amendment of ACE Limited 1995 Long Term Incentive Plan (in-
             corporated by reference to Exhibit 10.27 to Form 10-K of the Com-
             pany for the year ended September 30, 1996).
     10.28*  Third Amendment to Equity Linked Incentive Plan--Stock Apprecia-
             tion Right Plan (incorporated by reference to Exhibit 10.28 to
             Form 10-Q of the Company for the quarter ended March 31, 1997).
     10.29*  First Amendment of ACE Limited 1995 Outstanding Directors Plan
             (incorporated by reference to Exhibit 10.29 to Form 10-Q of the
             Company for the quarter ended June 30, 1997).
     10.30*  364 day Credit Agreement dated as of December 11, 1997 among ACE
             Limited, A.C.E. Insurance Company Ltd., Corporate Officers & Di-
             rectors Assurance Ltd. and Tempest Reinsurance Company Limited,
             the Banks listed on the signature pages hereof and Morgan Guaranty
             Trust Company of New York, as Administrative Agent.
     10.31*  Five year Credit Agreement dated as of December 11, 1997 among ACE
             Limited, A.C.E. Insurance Company Ltd., Corporate Officers & Di-
             rectors Assurance Ltd. and Tempest Reinsurance Company Limited,
             the Banks listed on the signature pages hereof and Morgan Guaranty
             Trust Company of New York, as Administrative Agent.
     10.32   Amended and Restated Reimbursement Agreement dated as of December
             11, 1997 among A.C.E. Insurance Company, Ltd., the Banks listed on
             the signature pages hereof and Morgan Guaranty Trust Company of
             New York, as Issuing Bank and Administrative Agent.
     10.33   Term Loan Agreement dated as of December 11, 1997 among ACE US
             Holdings, Inc., ACE Limited, the Banks listed on the signature
             pages hereof and Morgan Guaranty Trust Company of New York, as Ad-
             ministrative Agent.
     11.1    Statement regarding computation of per share earnings.
     13.1    Pages 20 through 53 of the 1997 Annual Report to Shareholders
     21.1    Subsidiaries of the Company.
     23.1    Consent of Coopers & Lybrand L.L.P.
     27.1    Financial Data Schedule
     99.1    Extracts from the Company's Registration Statement on Form S-1
             (No. 333-04153)
             concerning taxation of ACE and its Subsidiaries.
</TABLE>
- --------
*Management Contract or Compensatory Plan.
 
  (b) REPORTS ON FORM 8-K
 
  The Company filed Form 8-K current report dated September 18, 1997 pertaining
to the Registrants press release relating to the proposed acquisition of
Westchester Specialty Group, Inc.
 
                                       27
<PAGE>
 
           REPORT OF INDEPENDENT ACCOUNTANTS ON FINANCIAL STATEMENT
                        SCHEDULES INCLUDED IN FORM 10-K
 
  Our report on the consolidated financial statements of ACE LIMITED AND
SUBSIDIARIES has been incorporated by reference in this Form 10-K from page 32
of the 1997 Annual Report to Shareholders of ACE Limited. In connection with
our audits of such financial statements, we have also audited the related
financial statement schedules listed in item 14 of this Form 10-K.
 
  In our opinion, the financial statement schedules referred to above, when
considered in relation to the basic financial statements taken as whole,
present fairly, in all material respects, the information required to be
included therein.
 
                                          Coopers & Lybrand L.L.P.
 
New York, New York
November 5, 1997
 
                                      28
<PAGE>
 
                                   SCHEDULE I
 
                          ACE LIMITED AND SUBSIDIARIES
 
       SUMMARY OF INVESTMENTS--OTHER THAN INVESTMENTS IN RELATED PARTIES
 
                               SEPTEMBER 30, 1997
 
<TABLE>
<CAPTION>
                                                                AMOUNT AT WHICH
                                         COST OR                 SHOWN IN THE
                                      AMORTIZED COST FAIR VALUE  BALANCE SHEET
                                      -------------- ---------- ---------------
                                           (IN THOUSANDS OF U.S. DOLLARS)
<S>                                   <C>            <C>        <C>
FIXED MATURITIES:
  Bonds:
    U.S. Treasury and agency.........   $  488,961   $  505,783   $  505,783
    Non-U.S. governments.............      157,206      158,506      158,506
    Corporate securities.............    1,255,837    1,283,606    1,283,606
    Mortgage-backed securities.......    1,324,507    1,342,441    1,342,441
                                        ----------   ----------   ----------
      Total fixed maturities.........    3,226,511    3,290,336    3,290,336
                                        ----------   ----------   ----------
EQUITY SECURITIES:
  Common stock:
    Public utilities.................       11,925       14,637       14,637
    Banks, trust and insurance
     companies.......................       92,035      109,731      109,731
    Industrial, miscellaneous and all
     other...........................      396,666      507,617      507,617
  Non redeemable preferred stock.....        1,855        2,985        2,985
                                        ----------   ----------   ----------
      Total equity securities........      502,481      634,970      634,970
                                        ----------   ----------   ----------
  Other investments..................       78,691       78,691       78,691
                                        ----------   ----------   ----------
  Short-term investments and cash....      470,888      470,768      470,768
                                        ----------   ----------   ----------
      Total investments and cash.....   $4,278,571   $4,474,765   $4,474,765
                                        ==========   ==========   ==========
</TABLE>
 
                                       29
<PAGE>
 
                                  SCHEDULE II
 
                          ACE LIMITED AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
 
                      BALANCE SHEETS (PARENT COMPANY ONLY)
 
                          SEPTEMBER 30, 1997 AND 1996
 
<TABLE>
<CAPTION>
                                                       1997        1996
                                                    ----------  ----------
                                                      (IN THOUSANDS OF U.S.
                                                            DOLLARS)
<S>                                                 <C>         <C>         <C>
ASSETS
Investments and cash
  Investments in subsidiaries and affiliate on
   equity basis.................................... $2,684,624  $2,252,319
  Other investments, at cost.......................     33,151      13,334
  Cash.............................................     17,770       2,297
                                                    ----------  ----------
    Total investments and cash.....................  2,735,545   2,267,950
Due from subsidiaries and affiliates, net..........     14,272         --
Other assets.......................................     10,891      10,554
                                                    ----------  ----------
    Total assets................................... $2,760,708  $2,278,504
                                                    ==========  ==========
LIABILITIES
Advances from affiliate............................ $  122,270  $      --
Accounts payable and accrued liabilities...........      6,808      16,812
Dividend payable...................................     12,436      10,470
Due to subsidiaries and affiliate, net.............        --        6,944
                                                    ----------  ----------
    Total liabilities..............................    141,514      34,226
                                                    ----------  ----------
SHAREHOLDERS' EQUITY
Ordinary shares....................................      6,911       7,271
Additional paid-in capital.........................  1,102,824   1,156,194
Unearned stock grant compensation..................     (1,993)     (1,299)
Net unrealized appreciation on investments.........    196,194      61,281
Cumulative translation adjustment..................        855         131
Retained earnings..................................  1,314,403   1,020,700
                                                    ----------  ----------
    Total shareholders' equity.....................  2,619,194   2,244,278
                                                    ----------  ----------
    Total liabilities and shareholders' equity..... $2,760,708  $2,278,504
                                                    ==========  ==========
</TABLE>
 
                                       30
<PAGE>
 
                            SCHEDULE II--(CONTINUED)
 
                          ACE LIMITED AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
 
                 STATEMENTS OF OPERATIONS (PARENT COMPANY ONLY)
 
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                    1997      1996      1995
                                                  --------  --------  --------
                                                    (IN THOUSANDS OF U.S.
                                                           DOLLARS)
<S>                                               <C>       <C>       <C>
Revenues
  Management fees................................ $ 26,601  $ 21,081  $ 17,580
  Investment income, including intercompany
   interest income...............................  (17,348)   (6,881)   (9,034)
  Equity in net income of subsidiaries and
   affiliate.....................................  480,997   313,359   254,901
  Net realized gains (losses) on investments.....      (16)      --        --
                                                  --------  --------  --------
                                                   490,234   327,559   263,447
Expenses
  Administrative expenses........................  (28,880)  (37,826)  (25,881)
                                                  --------  --------  --------
    Net income................................... $461,354  $289,733  $237,566
                                                  ========  ========  ========
</TABLE>
 
                                       31
<PAGE>
 
                            SCHEDULE II--(CONTINUED)
 
                          ACE LIMITED AND SUBSIDIARIES
 
                 CONDENSED FINANCIAL INFORMATION OF REGISTRANT
 
                 STATEMENTS OF CASH FLOWS (PARENT COMPANY ONLY)
 
             FOR THE YEARS ENDED SEPTEMBER 30, 1997, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                 1997       1996       1995
                                               ---------  ---------  ---------
                                                   (IN THOUSANDS OF U.S.
                                                         DOLLARS)
<S>                                            <C>        <C>        <C>
Cash flows from operating activities
  Net income (loss)........................... $ 461,354  $ 289,733  $ 237,566
  Adjustments to reconcile net income (loss)
   to net cash provided by operating
   activities
    Equity in net income of subsidiaries and
     affiliate................................  (480,997)  (313,359)  (254,901)
    Realized (gains) losses on investments....        16        --         --
    Amounts due to subsidiaries and affiliate,
     net......................................    (6,944)    (4,036)      (475)
    Accounts payable and accrued liabilities..   (10,004)     6,625      2,414
    Accrued interest on advances to affiliate.     3,978     (9,729)     8,682
    Other.....................................    (6,804)    (3,957)    (2,935)
                                               ---------  ---------  ---------
      Net cash flows from (used for) operating
       activities.............................   (39,401)    34,723     (9,649)
                                               ---------  ---------  ---------
Cash flows from investing activities
  Dividends received from subsidiaries........   190,000    135,000        --
  Advances to affiliate.......................  (241,000)  (284,620)      (300)
  Repayment of advances to affiliate..........   (19,817)       --         --
  Capitalization of subsidiary................       --      74,123        --
                                               ---------  ---------  ---------
      Net cash used for investing activities..   (70,817)   (75,497)      (300)
                                               ---------  ---------  ---------
Cash flows from financing activities
  Proceeds from exercise of options for
   shares.....................................     2,191         28        168
  Proceeds from shares issued under Stock
   Appreciation Rights Plan...................     4,156        --         --
  Repurchase of Ordinary Shares...............  (182,648)   (57,931)   (33,514)
  Dividends paid..............................   (43,028)   (27,685)   (22,058)
  Loan Repayments.............................  (180,000)       --         --
  Advances from affiliate.....................   525,020    198,050     63,350
                                               ---------  ---------  ---------
      Net cash from financing activities......   125,691    112,462      7,946
                                               ---------  ---------  ---------
Net increase (decrease) in cash...............    15,473      2,242     (2,003)
Cash--beginning of year.......................     2,297         55      2,058
                                               ---------  ---------  ---------
Cash--end of year............................. $  17,770  $   2,297  $      55
                                               =========  =========  =========
</TABLE>
 
                                       32
<PAGE>
 
                                  SCHEDULE VI
 
                         ACE LIMITED AND SUBSIDIARIES
 
       SUPPLEMENTARY INFORMATION CONCERNING PROPERTY/CASUALTY OPERATIONS
 
<TABLE>
<CAPTION>
                                                                       LOSSES AND LOSS
                              RESERVES                                    EXPENSES
                             FOR UNPAID                              INCURRED RELATED TO AMORTIZATION   PAID
                  DEFERRED     LOSSES                        NET     ------------------- OF DEFERRED   LOSSES    NET
                 ACQUISITION  AND LOSS  UNEARNED  EARNED  INVESTMENT  CURRENT    PRIOR   ACQUISITION  AND LOSS PREMIUMS
                    COSTS     EXPENSES  PREMIUM  PREMIUM    INCOME     YEAR      YEAR       COSTS     EXPENSES WRITTEN
                 ----------- ---------- -------- -------- ---------- ------------------- ------------ -------- --------
                                                     (IN THOUSANDS OF U.S. DOLLARS)
<S>              <C>         <C>        <C>      <C>      <C>        <C>       <C>       <C>          <C>      <C>
1997............   $27,018   $1,869,995 $400,689 $644,838  $237,823  $ 435,941     --      $46,957    $402,059 $639,744
1996............   $34,546   $1,836,113 $398,731 $587,245  $206,524  $ 464,824     --      $52,954    $101,376 $602,707
1995............   $34,428   $1,437,930 $305,568 $428,661  $181,375  $ 350,653     --      $46,647    $ 73,115 $424,756
</TABLE>
 
                                       33
<PAGE>
 
                                   SIGNATURE
 
  PURSUANT TO THE REQUIREMENTS OF SECTION 13 OR 15(D) OF THE SECURITIES
EXCHANGE ACT OF 1934, THE REGISTRANT HAS DULY CAUSED THIS REPORT TO BE SIGNED
ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED.
 
                                          ACE Limited
 
                                                  Christopher Z. Marshall
                                          By: _________________________________
                                                  Christopher Z. Marshall
                                                  Chief Financial Officer
 
December 22, 1997
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE
REGISTRANT AND IN THE CAPACITIES AND ON THE DATES INDICATED.
 
<TABLE>
<CAPTION>
             SIGNATURE                           TITLE                    DATE
             ---------                           -----                    ----
<S>                                  <C>                           <C>
         Brian Duperreault
- ------------------------------------
         Brian Duperreault           Chairman, President and
                                      Chief Executive Officer;
                                      Director                     December 22, 1997
      Christopher Z. Marshall
- ------------------------------------
      Christopher Z. Marshall        Chief Financial Officer
                                      (Principal Financial and
                                      Accounting Officer)          December 22, 1997
           Donald Kramer
- ------------------------------------
           Donald Kramer             Vice Chairman; Director       December 22, 1997
          Michael G. Atieh
- ------------------------------------
          Michael G. Atieh           Director                      December 22, 1997
         Bruce L. Crockett
- ------------------------------------
         Bruce L. Crockett           Director                      December 22, 1997
 
        Jeffrey W. Greenberg
- ------------------------------------
        Jeffrey W. Greenberg         Director                      December 22, 1997
         Meryl D. Hartzband
- ------------------------------------
         Meryl D. Hartzband          Director                      December 22, 1997
        Robert M. Hernandez
- ------------------------------------
        Robert M. Hernandez          Director                      December 22, 1997
</TABLE>
 
                                      34
<PAGE>
 
<TABLE>
<CAPTION>
             SIGNATURE                           TITLE                    DATE
             ---------                           -----                    ----
<S>                                  <C>                           <C>
           Peter Menikoff
- ------------------------------------
           Peter Menikoff            Director                      December 22, 1997
           Thomas J. Neff
- ------------------------------------
           Thomas J. Neff            Director                      December 22, 1997
           Glen M. Renfew
- ------------------------------------
           Glen M. Renfew            Director                      December 22, 1997
            Robert Ripp
- ------------------------------------
            Robert Ripp              Director                      December 22, 1997
          Walter A. Scott
- ------------------------------------
          Walter A. Scott            Director                      December 22, 1997
         Dermot F. Smurfit
- ------------------------------------
         Dermot F. Smurfit           Director                      December 22, 1997
          Robert W. Staley
- ------------------------------------
          Robert W. Staley           Director                      December 22, 1997
           Gary M. Stuart
- ------------------------------------
           Gary M. Stuart            Director                      December 22, 1997
          Sidney F. Wentz
- ------------------------------------
          Sidney F. Wentz            Director                      December 22, 1997
</TABLE>
 
                                       35

<PAGE>
 
                                                                     EXHIBIT 2.2

                            STOCK PURCHASE AGREEMENT
                      (Westchester Specialty Group, Inc.)


                                 BY AND BETWEEN

                            TALEGEN HOLDINGS, INC.,

                                      AND

                                  ACE LIMITED



                         DATED AS OF SEPTEMBER 18, 1997
<PAGE>
 
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                              Page
                                                                                                              ----
<S>                                                                                                           <C>
ARTICLE I        DEFINITIONS.................................................................................    2
     Section 1.1  Definitions................................................................................    2

ARTICLE II       PURCHASE OF SHARES..........................................................................   10
     Section 2.1  Purchase of Shares.........................................................................   10
     Section 2.2  Purchase Price Adjustments.................................................................   10

ARTICLE III      THE CLOSING.................................................................................   10
     Section 3.1  The Closing................................................................................   10

ARTICLE IV       REPRESENTATIONS AND WARRANTIES OF SELLER....................................................   11
     Section 4.1  Organization and Related Matters...........................................................   11
     Section 4.2  Subsidiaries...............................................................................   11
     Section 4.3  Authority; No Violation....................................................................   12
     Section 4.4  Consents and Approvals.....................................................................   14
     Section 4.5  Stock Ownership............................................................................   14
     Section 4.6  Financial Statements.......................................................................   14
     Section 4.7  No Other Broker............................................................................   15
     Section 4.8  Legal Proceedings..........................................................................   15
     Section 4.9  Undisclosed Liabilities....................................................................   16
     Section 4.10  Compliance with Applicable Law; Insurance Operations......................................   16
     Section 4.11  Absence of Certain Changes................................................................   17
     Section 4.12  Technology and Intellectual Property......................................................   19
     Section 4.13  Employee Benefit Plans; ERISA.............................................................   20
     Section 4.14  Taxes.....................................................................................   23
     Section 4.15  Contracts.................................................................................   24
     Section 4.16  No Material Adverse Change................................................................   25
     Section 4.17  Portfolio Investments.....................................................................   25
     Section 4.18  Reserves..................................................................................   25
     Section 4.19  Title to Assets, etc......................................................................   25
     Section 4.20  Transactions with Certain Persons.........................................................   26
     Section 4.21  Reinsurance and Retrocessions.............................................................   27
     Section 4.22  Environmental Laws........................................................................   27
     Section 4.23  Insurance Coverage........................................................................   28
     Section 4.24  Labor Matters.............................................................................   28
     Section 4.25  No Other Agreements to Sell the Assets or the Company.....................................   28
     Section 4.26  1992/93 Restructuring.....................................................................   28

ARTICLE V        REPRESENTATIONS AND WARRANTIES OF BUYER.....................................................   29
     Section 5.1  Organization and Related Matters...........................................................   29
     Section 5.2  Authority; No Violation....................................................................   29
     Section 5.3  Consents and Approvals.....................................................................   30
     Section 5.4  Legal Proceedings..........................................................................   30
     Section 5.5  Investment Intent of Buyer.................................................................   30
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                                              Page
                                                                                                              ----
<S>                                                                                                           <C>
     Section 5.6  Investment Company..........................................................................   30
     Section 5.7  No Other Broker.............................................................................   30
     Section 5.8  Financing...................................................................................   31

ARTICLE VI       COVENANTS....................................................................................   31
     Section 6.1  Conduct of Business.........................................................................   31
     Section 6.2  Confidentiality and Announcements...........................................................   31
     Section 6.3  Expenses....................................................................................   31
     Section 6.4  Access; Certain Communications..............................................................   31
     Section 6.5  Regulatory Matters; Third Party Consents....................................................   32
     Section 6.6  Further Assurances..........................................................................   33
     Section 6.7  Notification of Certain Matters.............................................................   34
     Section 6.8  Maintenance of Records......................................................................   34
     Section 6.9  Employees and Employee Plans................................................................   35
     Section 6.10  Pre-Closing Dividends......................................................................   37
     Section 6.11  Crostex/Camfex.............................................................................   37
     Section 6.12  Exclusivity................................................................................   38
     Section 6.13  Additional Financial Statements............................................................   38
     Section 6.14  Intercompany Accounts......................................................................   39
     Section 6.15  Rating Agency Presentations................................................................   39
     Section 6.16  Investment Portfolio.......................................................................   40
     Section 6.17  Reinsurance Agreements.....................................................................   40
     Section 6.18  Person Authorized to Act Prior to the Closing..............................................   41
     Section 6.19  Tax Sharing Agreement Releases.............................................................   41

ARTICLE VII      CONDITIONS TO CLOSING........................................................................   41
     Section 7.1  Conditions to Buyer's Obligations...........................................................   41
     Section 7.2  Conditions to Seller's Obligations..........................................................   43
     Section 7.3  Mutual Conditions...........................................................................   44

ARTICLE VIII     SURVIVAL OF REPRESENTATIONS, WARRANTIES,COVENANTS AND AGREEMENTS; INDEMNIFICATION............   45
     Section 8.1  Survival....................................................................................   45
     Section 8.2  Obligation of Seller to Indemnify, Reimburse, etc...........................................   46
     Section 8.3  Obligation of Buyer to Indemnify, Reimburse, etc............................................   46
     Section 8.4  Notice and Opportunity to Defend Against Third Party Claims.................................   46
     Section 8.5  Net Indemnity...............................................................................   48
     Section 8.6  Tax Indemnification.........................................................................   48
     Section 8.7  Limits on Indemnification...................................................................   48

ARTICLE IX       TERMINATION..................................................................................   48
     Section 9.1  Termination.................................................................................   48
     Section 9.2  Obligations upon Termination................................................................   49

ARTICLE X        MISCELLANEOUS................................................................................   49
     Section 10.1  Amendments; Extension; Waiver..............................................................   49
     Section 10.2  Entire Agreement...........................................................................   49
</TABLE>

                                     -ii-
<PAGE>
 
<TABLE>
<S>                                                                                           <C>
      Section 10.3  Interpretation..........................................................  50
      Section 10.4  Severability............................................................  50
      Section 10.5  Notices.................................................................  50
      Section 10.6  Binding Effect; Persons Benefiting......................................  51
      Section 10.7  Assignment..............................................................  51
      Section 10.8  Counterparts............................................................  51
      Section 10.9  No Prejudice............................................................  52
      Section 10.10  Governing Law..........................................................  52
      Section 10.11  Service; Jurisdiction..................................................  52
      Section 10.12  Specific Performance...................................................  52
</TABLE>

                                    EXHIBITS

Exhibit A          Form of Guarantee Agreement                                 
Exhibit B          Form of Ridge Re Amendment                                  
Exhibit C          [Not Used]                                                  
Exhibit D          Form of Release of Tax Sharing Agreements                   
Exhibit E          Form of Opinion of LeBoeuf, Lamb, Greene & MacRae, L.L.P.   
Exhibit F          Form of Opinions of Maples & Calder and Mayer, Brown & Platt 


                                   SCHEDULES

Schedule 1.1     Berkshire Hathaway Reinsurance Agreement
Schedule 1.2     Exclusions from the Definition of Company Employees
Schedule 1.3     Knowledge of Seller
Schedule 4.2     Subsidiaries
Schedule 4.4     Consents and Approvals
Schedule 4.6     Financial Statements
Schedule 4.8     Legal Proceedings
Schedule 4.9     Undisclosed Liabilities
Schedule 4.10    Compliance with Applicable Law; Insurance Operations
Schedule 4.11    Absence of Certain Changes
Schedule 4.12    Technology and Intellectual Property
Schedule 4.13    Employee Benefit Plans; ERISA
Schedule 4.14    Taxes
Schedule 4.15    Contracts
Schedule 4.16    No Material Adverse Change
Schedule 4.17    Portfolio Investments
Schedule 4.19    Title to Assets, etc.
Schedule 4.20    Transactions with Certain Persons
Schedule 4.21    Reinsurance and Retrocessions
Schedule 4.22    Environmental Laws
Schedule 4.24    Labor Matters
Schedule 4.25    No Other Agreements to Sell the Assets of the Company
Schedule 5.3     Consents and Approvals

                                     -iii-
<PAGE>
 
                           STOCK PURCHASE AGREEMENT


          STOCK PURCHASE AGREEMENT, dated as of September 18, 1997, by and
between Talegen Holdings, Inc., a Delaware corporation ("Seller"), and ACE
Limited, a Cayman Islands corporation ("Buyer").

                                   RECITALS

          WHEREAS, Seller is the owner of 1,000 shares, par value $1.00 per
share (the "Shares"), of common stock of Westchester Specialty Group, Inc., a
Delaware corporation (the "Company"), which Shares constitute all of the issued
and outstanding shares of the Company's capital stock;

          WHEREAS, certain of the Company's wholly-owned subsidiaries,
Westchester Fire Insurance Company, a New York stock insurance company
("Westchester Fire"), Westchester Surplus Lines Insurance Company, a Georgia
stock insurance company, and Industrial Underwriters Insurance Company, a Texas
stock insurance company (collectively the "Insurance Subsidiaries"), are engaged
in the property and casualty insurance business;

          WHEREAS, Buyer desires to purchase the Shares from Seller upon the
terms and subject to the conditions set forth herein;

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

          WHEREAS, Buyer and Seller have entered into the Tax Agreement (as
defined in Section 1.1) simultaneously with the execution of this Agreement; and

          WHEREAS, Xerox Financial Services, Inc., a Delaware corporation
("Parent"), has agreed to enter into a guarantee of certain obligations of
Seller pursuant to this Agreement in the form attached hereto as Exhibit A (the
"Guarantee").

          NOW, THEREFORE, in consideration of the mutual covenants,
representations, warranties and agreements contained herein, and of other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and intending to be bound hereby, the parties agree as follows:
<PAGE>
 
                                   ARTICLE I

                                  DEFINITIONS

          Section 1.1  Definitions.  For all purposes of this Agreement, the
                       -----------                                          
following terms shall have the respective meanings set forth in this Section 1.1
(such definitions to be equally applicable to both the singular and plural forms
of the terms herein defined):

          "Action" means any legal, administrative, arbitration or other
proceeding, claim, suit, action or governmental or regulatory investigation of
any nature.

          "Affiliate" means, with respect to any Person, any other Person who
directly or indirectly controls, is controlled by or is under common control
with such Person.

          "Agreement" means this Stock Purchase Agreement, together with all
Schedules and Exhibits referenced herein, between Buyer and Seller, as such may
hereafter be amended from time to time.

          "Ancillary Agreements" means, collectively, the Ridge Re Agreement (as
amended by the Ridge Re Amendment), the Guarantee and the Tax Agreement.

          "Applicable Law" means any domestic or foreign federal, state or local
statute, law, ordinance, rule, regulation, order, writ, injunction, judgment or
decree applicable to Seller, the Company, Buyer or any of their respective
Subsidiaries, properties, assets, officers, directors, employees or agents.

          "Asserted Liability" has the meaning set forth in Section 8.4.

          "Berkshire Hathaway Reinsurance Agreement" means the reinsurance
agreement between the Company and National Indemnity Company upon such terms and
conditions as are described on Schedule 1.1.

          "Business Day" means any day other than a Saturday, a Sunday or a day
on which banks in New York, New York are required to be closed for regular
banking business.

          "Buyer" has the meaning set forth in the first paragraph of this
Agreement.

          "CFI Entities" means, collectively, Crum & Forster Holdings, Inc., a
subsidiary of Seller, and United States Fire Insurance Company and The North
River Insurance Company, each of which is a subsidiary of Crum & Forster
Holdings, Inc.

          "Claims Notice" has the meaning set forth in Section 8.4.

          "Closing" has the meaning set forth in Section 3.1.

          "Closing Date" means the date of the Closing.

          "Code" means the Internal Revenue Code of 1986, as amended .

          "Company" has the meaning set forth in the Recitals of this Agreement.

                                      -2-
<PAGE>
 
          "Company Employees" means those current or former employees of the
Company and its Subsidiaries who, on the Closing Date, are either:

          (a) actively employed by the Company or its Subsidiaries, including
     those who are absent from employment due to illness, injury, military
     service or other authorized absence (including those who are "disabled"
     within the meaning of either the short-term or the long-term disability
     plan currently applicable to the Company and its Subsidiaries
     (collectively, the "Disability Plans"));

          (b) former employees who, on the Closing Date, are receiving long-term
     disability benefits under the Disability Plans; and/or

          (c) former employees who have previously satisfied the requirements
     for retiree medical and/or life insurance coverage under the Talegen
     Holdings, Inc. Medical and Life Plans for Retirees and Disabled Employees,

but excluding (i) other former employees, (ii) employees otherwise not actively
employed by the Company or its Subsidiaries (other than as specifically included
above), and (iii) those employees of the Company and its Subsidiaries whose
names are set forth on Schedule 1.2.  The names of those former employees who
are described in paragraphs (b) and (c) above, as of July 18, 1997, are set
forth on Schedule 1.2.

          "Company GAAP Financial Statements" means the audited Consolidated
Balance Sheets of the Company (or its predecessors) as of December 31, 1996 and
1995 and the Consolidated Statements of Operations, Consolidated Statements of
Shareholder's Equity and Consolidated Statements of Cash Flows of the Company
(or its predecessors) for each of the three fiscal years included in the three-
year period ended December 31, 1996, prepared in accordance with GAAP, together
with the notes thereon and the related reports of KPMG Peat Marwick LLP.

          "Company Interim Financial Statements" shall mean the unaudited
Consolidated Balance Sheets and the unaudited Consolidated Statements of
Operations, Consolidated Statements of Shareholder's Equity and Consolidated
Statements of Cash Flows of the Company as of and for the six-month periods
ended June 30, 1997 and 1996, as provided in the Company's quarterly monitoring
report.

          "Confidentiality Agreement" means that certain letter agreement, dated
March 7, 1997, between Buyer and Seller with respect to the confidentiality of
information about Seller, the Company and their respective Affiliates and other
related Persons which was provided by or at the request of Seller or the Company
to Buyer, as such letter agreement may have been or may hereafter be amended
from time to time.

          "Contracts" has the meaning set forth in Section 4.15.

          "control" (including, with correlative meanings, the terms
"controlling," "controlled by" and "under common control with") means the
possession, directly or indirectly, of the power to direct or cause the
direction of the management or policies of the controlled Person, whether
through the ownership of voting securities, by agreement or otherwise.

          "Convention Statements" shall mean (i) the annual convention
statements and the quarterly statement of each Insurance Subsidiary as filed
with an Insurance Regulator for the years ended December 31, 1996, 1995 and 1994
and for the quarterly period ended June 30, 1997, and (ii) the annual

                                      -3-
<PAGE>
 
statutory financial reports of Ridge Re as filed with the insurance regulatory
authorities in Bermuda for the years ended December 31, 1996, 1995 and 1994.

          "Crostex/Camfex Leases" shall mean the following:

          (a)  that certain Amended and Restated Lease Agreement between Crostex
     Associates Limited Partnership, as Lessor, and the Crostex/Camfex Pool
     Companies, as Lessee, dated as of March 1, 1995, relating to 4040 North
     Central Expressway, Dallas, Texas (the "Dallas Lease"); and

          (b)  that certain Amended and Restated Lease Agreement between Camfex
     Associates Limited Partnership, as Lessor, and the Crostex/Camfex Pool
     Companies, as Lessee, dated as of March 1, 1995, relating to 5724 W. Los
     Positos Blvd., Pleasanton, California (the "Pleasanton Lease").

          "Crostex/Camfex Pool Companies" means United States Fire Insurance
Company, The North River Insurance Company, Westchester Fire and International
Insurance Company.

          "Crostex/Camfex Purchase Money Documents" shall mean the following:

          (a)  that certain "Note Due December 1, 2009," dated December 21,
     1984, in the principal amount of $4,468,097 from Crostex Associates Limited
     Partnership to the Crostex/Camfex Pool Companies, together with the related
     Purchase Money Mortgage, dated as of December 21, 1984, granting the
     holders of such promissory note a subordinated security interest in the
     building at 305 Madison Avenue, Morris Township, New Jersey, and any other
     related documents or instruments (collectively, the "305 Purchase Money
     Documents");

          (b)  that certain "Note Due December 1, 2009," dated December 21,
     1984, in the principal amount of $1,263,595 from Crostex Associates Limited
     Partnership to the Crostex/Camfex Pool Companies, together with the related
     Purchase Money Mortgage, dated as of December 21, 1984, granting the
     holders of such promissory note a subordinated security interest in the
     building at 299 Madison Avenue, Morris Township, New Jersey, and any other
     related documents or instruments (collectively, the "299 Purchase Money
     Documents");

          (c)  that certain "Note Due December 1, 2009," dated December 21,
     1984, in the principal amount of $2,214,788 from Crostex Associates Limited
     Partnership to the Crostex/Camfex Pool Companies, together with the related
     Deed of Trust, dated as of December 1, 1984, granting the holders of such
     promissory note a subordinated security interest in the building at 4040
     North Central Expressway, Dallas, Texas, and any other related documents or
     instruments (collectively, the "Dallas Purchase Money Documents"); and

          (d)  that certain "Note Due December 1, 2009," dated December 21,
     1984, in the principal amount of $716,407 from Camfex Associates Limited
     Partnership to the Crostex/Camfex Pool Companies, together with the related
     Deed of Trust, dated as of December 1, 1984, granting the holders of such
     promissory note a subordinated security interest in the building at 5724 W.
     Los Positos Blvd., Pleasanton, California, and any other related documents
     or instruments (collectively, the "Pleasanton Purchase Money Documents").

          "Dallas Lease" has the meaning set forth in the definition of
"Crostex/Camfex Leases."

                                      -4-
<PAGE>
 
          "Dallas Purchase Money Documents" has the meaning set forth in the
definition of "Crostex/Camfex Purchase Money Documents."

          "Disability Plans" has the meaning set forth in the definition of
"Company Employees."

          "Encumbrance" means any lien (statutory or other), mortgage, pledge,
security interest, lease, claim, charge, easement, limitation, commitment, right
of way, encroachment, restriction or encumbrance of any kind or nature
whatsoever, or any agreement to give any of the foregoing; provided that, with
respect to the Shares only, this definition of "Encumbrance" shall not include
(i) any such encumbrance arising as a result of the status of, or any action
taken by, Buyer or any of its Affiliates and (ii) any limitation or restriction
imposed upon the transfer of the Shares by any registration provision of the
Securities Act of 1933, as amended, or any applicable state securities law
regulating the disposition of the Shares.

          "Environmental Law" means any Law which relates to or otherwise
imposes liability or standards of conduct concerning environmental protection,
health and safety of persons, discharges, emissions, releases or threatened
releases of any noises, odors or Hazardous Materials into ambient air, water or
land, or otherwise relating to the manufacture, processing, generation,
distribution, use, treatment, storage, disposal, cleanup, transport or handling
of Hazardous Materials, including the Comprehensive Environmental Response,
Compensation and Liability Act, as amended by the Superfund Amendments and
Reauthorization Act, as amended, the Occupational Safety and Health Act, as
amended, the Resource Conservation and Recovery Act, as amended, the Toxic
Substances Control Act, as amended, the Federal Water Pollution Control Act, as
amended, the Clean Water Act, as amended, any so-called "Superlien" law, and any
other similar federal, state or local Law.

          "Environmental Permit" means any permit, license, approval, consent or
other authorization required by or pursuant to any applicable Environmental Law.

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

          "ERISA Affiliate" means any trade or business (whether or not
incorporated) which is a member of a controlled group including the Company, or
under common control with the Company, within the meaning of Section 414 of the
Code or Section 4001 of ERISA.

          "Exon-Florio Amendment" means Section 721 of the Defense Production
Act of 1950, as amended.

          "GAAP" means generally accepted accounting principles as used in the
United States as in effect at the time any applicable financial statements were
prepared or any act requiring the application of GAAP was performed.

          "Governmental Authority" means the government of the United States or
any foreign country or any state or political subdivision thereof and any
entity, body or authority exercising executive, legislative, judicial,
regulatory or administrative functions of or pertaining to government, including
the Pension Benefit Guaranty Corporation and other quasi-governmental entities
established to perform such functions.

          "Guarantee" has the meaning set forth in the Recitals of this
Agreement.

                                      -5-
<PAGE>
 
          "Hazardous Material" means any (i) hazardous substance, toxic
substance, hazardous waste or pollutant (as such terms are defined by or within
the meaning of any Environmental Law), (ii) material or substance which is
regulated or controlled as a hazardous substance, toxic substance, pollutant or
other regulated or controlled material, substance or matter pursuant to any
Environmental Law, (iii) petroleum, crude oil or fraction thereof, (iv)
asbestos-containing material, (v) polychlorinated biphenyls, (vi) lead-based
paint or (vii) radioactive material, except for those materials or substances
that are subject to regulation or control solely as a result of being a listed
chemical under the California Safe Drinking Water and Toxic Enforcement Act of
1986 (Proposition 65).

          "HoldCo" means the wholly owned United States subsidiary of Buyer
formed for the purposes of acquiring and holding the Company and its
Subsidiaries, and any other United States insurance operations Buyer may acquire
from time to time, which has been assigned, prior to the Closing, the purchase
rights of Buyer under this Agreement in accordance with Section 10.7.

          "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended, and the rules and regulations promulgated thereunder.

          "Indemnifying Party" has the meaning set forth in Section 8.4.

          "Indemnitee" has the meaning set forth in Section 8.4.

          "Information Returns" shall have the meaning ascribed in the Tax
Agreement.

          "Insurance Regulator" means the insurance regulatory authority in the
state in which the applicable Insurance Subsidiary is domiciled.

          "Insurance Subsidiaries" has the meaning set forth in the Recitals of
this Agreement.

          "Intellectual Property Right" has the meaning set forth in Section
4.12.

          "IRP" means The Individual Retirement Plan of Talegen Holdings, Inc.

          "IRS" means the Internal Revenue Service.

          "knowledge of Seller" means the actual knowledge of the individuals
listed on Schedule 1.3.

          "KPMG Report" has the meaning set forth in Section 4.18.

          "Latest Balance Sheet" has the meaning set forth in Section 4.9.

          "Law" means any law, statute, regulation, ordinance, rule, order,
decree, judgment, consent decree, settlement agreement or governmental
requirement enacted, promulgated, entered into, agreed or imposed by any
Governmental Authority.

          "Loss" means any and all claims, losses, liabilities, damages,
judgments or settlements of any nature or kind, and any and all costs and
expenses related thereto (including interest, penalties and attorney's,
accountant's, consultant's and expert's fees and expenses), that are imposed
upon or otherwise incurred or suffered by the relevant party.

                                      -6-
<PAGE>
 
          "Material Adverse Effect" means any event, change, condition, fact or
effect which (i) has a material adverse effect on the business, operations,
assets, liabilities, condition (financial or otherwise) or results of operations
of the Company and its Subsidiaries, taken as a whole, or (ii) would prevent or
materially delay the performance by Seller of its obligations under this
Agreement.

          "1992/93 Restructuring" shall mean the restructuring of the insurance
operations of Seller and its subsidiaries pursuant to the Restructuring
Agreement, dated as of September 3, 1993, among Seller, Ridge Re, the Company
and the other parties thereto.

          "Parent" has the meaning set forth in the Recitals of this Agreement.

          "Permits" has the meaning set forth in Section 4.10.

          "Person" means any individual, corporation, company, partnership
(limited or general), joint venture, limited liability company, association,
trust or any other entity.

          "Plans" has the meaning set forth in Section 4.13.

          "Pleasanton Lease" has the meaning set forth in the definition of
"Crostex/Camfex Leases."

          "Pleasanton Purchase Money Documents" has the meaning set forth in the
definition of "Crostex/Camfex Purchase Money Documents."

          "Purchase Price" has the meaning set forth in Section 2.1.

          "Records" means all records and original documents which pertain to or
are utilized primarily by the Company or its Subsidiaries to administer,
reflect, monitor, evidence or record information relating to the business or
conduct of the Company or its Subsidiaries and all such records and original
documents, including all such records maintained on electronic or magnetic
media, or in any electronic database system of the Company or its Subsidiaries,
or necessary to comply with any Applicable Law with respect to the business of
the Company or its Subsidiaries.

          "Reinsurance Agreement" has the meaning set forth in Section 4.21.

          "Retirement Plan" means the Retirement Plan of Talegen Holdings, Inc.

          "Ridge Re" means Ridge Reinsurance Limited, a Bermuda corporation.

          "Ridge Re Agreement" means that certain Springing First Aggregate
Excess of Loss Reinsurance Agreement by and between the Insurance Subsidiaries,
Ridge Re and Parent, dated as of December 31, 1992, together with all
endorsements thereto.

          "Ridge Re Amendment" means that certain Endorsement #2 to the
Springing First Aggregate Excess of Loss Reinsurance Agreement by and between
the Insurance Subsidiaries, Ridge Re and Parent, in the form attached hereto as
Exhibit B.

          "Ridge Re GAAP Financial Statements" shall mean the audited
Consolidated Balance Sheets of Ridge Re as of December 31, 1996 and 1995 and the
related Statements of Operations and

                                      -7-
<PAGE>
 
Retained Earnings and Cash Flows for the years ended December 31, 1996 and 1995,
prepared in accordance with GAAP, together with the notes thereon and the
related reports of KPMG Peat Marwick.

          "Ridge Re Interim Financial Statements" shall mean the unaudited
Consolidated Balance Sheet of Ridge Re as of June 30, 1997, and the related
Statements of Operations and Retained Earnings for the six-month periods ended
June 30, 1997 and June 30, 1996.

          "SAP Financial Statements" has the meaning set forth in Section 4.6.

          "Section 4.15(b) Contracts" has the meaning set forth in Section 4.15.

          "Seller" has the meaning set forth in the first paragraph of this
Agreement.

          "SERP" means the Talegen Holdings, Inc. Supplemental Executive
Retirement Plan.

          "Shares" has the meaning set forth in the Recitals of this Agreement.

          "SIRP" means the Supplemental IRP of Talegen Holdings, Inc.

          "Subsidiaries" means the Insurance Subsidiaries and any other
corporation, partnership, joint venture or other entity which the Company
controls, directly or indirectly through one or more intermediaries.

          "Tax Agreement" means the Tax Allocation and Indemnification
Agreement, dated as of the date hereof, among Parent, Seller, the Company and
Buyer.

          "Tax Returns" shall have the meaning ascribed in the Tax Agreement.

          "Taxes" shall have the meaning ascribed in the Tax Agreement.

          "305 Purchase Money Documents" has the meaning set forth in the
definition of "Crostex/Camfex Purchase Money Documents."

          "299 Purchase Money Documents" has the meaning set forth in the
definition of "Crostex/Camfex Purchase Money Documents."

          "Westchester Fire" has the meaning set forth in the Recitals of this
Agreement.

          "Wire Transfer" means a payment in immediately available funds by wire
transfer in lawful money of the United States to such account or accounts as
shall have been designated by notice to the paying party.

          "Xerox" has the meaning set forth in Section 4.14.

                                      -8-
<PAGE>
 
                                  ARTICLE II

                              PURCHASE OF SHARES

          Section 2.1  Purchase of Shares.  Upon the terms and subject to the
                       ------------------                                    
conditions set forth in this Agreement, at the Closing Seller shall sell to
Buyer, and Buyer shall purchase from Seller, the Shares free and clear of all
Encumbrances for a purchase price of Three Hundred Thirty Three Million Dollars
($333,000,000), subject to adjustment in accordance with Sections 2.2 and 6.17
(as adjusted, the "Purchase Price").

          Section 2.2  Purchase Price Adjustments.  (a) If the Closing shall
                       --------------------------                           
take place at any time after 150 days from the date hereof but on or prior to
180 days from the date hereof, Buyer shall pay to Seller, as an adjustment to
the Purchase Price and in addition to the amount set forth in Section 2.1, an
amount equal to $72,555, multiplied by the number of days subsequent to the
150th day from the date hereof to and inclusive of the Closing Date.

               (b)  If the Closing shall take place at any time after 180 days
from the date hereof but on or prior to 210 days from the date hereof, Buyer
shall pay to Seller, as an adjustment to the Purchase Price and in addition to
the amount set forth in Section 2.1, an amount equal to the sum of (i)
$2,176,650, plus (ii) an amount equal to $81,805, multiplied by the number of
days subsequent to the 180th day from the date hereof to and inclusive of the
Closing Date.

               (c)  If the Closing shall take place at any time after 210 days
from the date hereof, Buyer shall pay to Seller, as an adjustment to the
Purchase Price and in addition to the amount set forth in Section 2.1, an amount
equal to the sum of (i) $4,630,800 plus (ii) an amount equal to $91,055,
multiplied by the number of days subsequent to the 210th day from the date
hereof to and inclusive of the Closing Date.

               (d)  The parties agree to adjust appropriately the Purchase Price
to take into account material adverse changes in U.S. Treasury yields between
August 1, 1997 and the Closing Date.


                                  ARTICLE III

                                  THE CLOSING

          Section 3.1  The Closing.  Upon the terms and subject to the
                       -----------                                    
conditions of this Agreement, the closing of the purchase and sale of the Shares
(the "Closing") shall be at 10:00 A.M. at the offices of LeBoeuf, Lamb, Greene &
MacRae, L.L.P., 125 West 55th Street, New York, New York 10019, or at any other
location designated by Seller, on the first Business Day of the calendar month
following the date on which all of the conditions set forth in Article VII
(other than those conditions designating instruments, certificates or other
documents to be delivered at the Closing) shall have been satisfied or waived,
or such other date and time as Buyer and Seller shall agree upon in writing.

                                      -9-
<PAGE>
 
                                  ARTICLE IV

                   REPRESENTATIONS AND WARRANTIES OF SELLER

          Seller hereby represents and warrants to Buyer as follows :

          Section 4.1  Organization and Related Matters.  Each of Parent, Seller
                       --------------------------------                         
and the Company is a corporation duly incorporated, validly existing and in good
standing under the laws of the State of Delaware.  The Company has the corporate
power and authority to carry on its business as it is now being conducted and to
own, lease or operate all of its properties and assets, and is duly qualified to
do business and is in good standing in each jurisdiction in which the nature of
the business conducted by it or the character of the assets owned by it makes
such qualification necessary, except where the failure to be so qualified would
not, individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Seller has delivered or made available to Buyer complete and
correct copies of the articles or certificate of incorporation and bylaws of
each of Seller and the Company, in each case as amended through the date hereof.
The minute books of the Company accurately reflect all formal actions taken at
all meetings and all consents in lieu of meetings of the sole stockholder of the
Company since August 1994 and all formal actions taken at all meetings and all
consents in lieu of meetings of the board of directors of the Company and all
committees thereof since August 1994.  True and complete copies of such minute
books have previously been made available for inspection by Buyer.

          Section 4.2  Subsidiaries.  (a) Schedule 4.2 sets forth a complete and
                       ------------                                             
accurate list, as of the date hereof, of all of the Subsidiaries of the Company.
Schedule 4.2 also contains the jurisdiction of incorporation or formation of
each Subsidiary of the Company, each jurisdiction in which such Subsidiary is
qualified or otherwise authorized to conduct insurance business, the number of
issued and outstanding shares of capital stock of each such Subsidiary and the
record holder(s) thereof.  Except as set forth on Schedule 4.2, all of the
outstanding shares of capital stock of the Subsidiaries are owned beneficially
and of record by the Company, free and clear of all Encumbrances and other
restrictions with respect to the transferability or assignability thereof, and
no capital stock of any of its Subsidiaries is or may become required to be
issued by reason of any options, warrants, rights to subscribe to, calls or
commitments of any character whatsoever relating to, or securities or rights
convertible into or exchangeable or exercisable for, shares of capital stock of
any of its Subsidiaries and, other than as contemplated by this Agreement, there
are no contracts, commitments, understandings or arrangements by which the
Company or any of its Subsidiaries is or may be bound to issue, redeem, purchase
or sell shares of Subsidiary capital stock or securities convertible into or
exchangeable or exercisable for any such shares.  Schedule 4.2 contains true and
complete copies of all agreements and other instruments pursuant to which the
Company or any Subsidiary is obligated or required, under any circumstance, to
make contributions to the capital of any Subsidiary.  The Subsidiaries are each
corporations duly organized, validly existing and in good standing under the
laws of their respective states of incorporation or domicile, and have the
corporate power and authority to carry on their respective businesses as now
being conducted and to own, lease and operate all of their respective properties
and assets.  Each of the Subsidiaries is duly qualified to do business in each
jurisdiction in which the nature of the business conducted by it or the
character of the assets owned by it makes such qualification necessary, except
where the failure to be so qualified would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect.  Seller has
delivered or made available to Buyer complete and correct copies of the articles
or certificate of incorporation and bylaws of each of the Subsidiaries, in each
case as amended through the date hereof.

          (b) Except as set forth on Schedule 4.2, and except for the stock of
its Subsidiaries and portfolio investments made in the ordinary course of
business, there are no corporations, partnerships,

                                      -10-
<PAGE>
 
business associations, joint ventures or other entities in which the Company
owns, of record or beneficially, any direct or indirect equity interest or any
right (contingent or otherwise) to acquire the same.

          Section 4.3  Authority; No Violation.  (a)  Seller has full corporate
                       -----------------------                                 
power and authority to execute and deliver this Agreement and the Tax Agreement
and to consummate the transactions contemplated hereby and thereby. The
execution and delivery of this Agreement and the Tax Agreement and the
consummation of the transactions contemplated hereby and thereby have been duly
and validly approved by all requisite corporate action on the part of Seller,
and no other corporate proceedings on the part of Seller are necessary to
approve this Agreement and the Tax Agreement or to consummate the transactions
contemplated hereby and thereby.  This Agreement and the Tax Agreement have been
duly and validly executed and delivered by Seller and (assuming the due
authorization, execution and delivery of this Agreement and the Tax Agreement by
Buyer and any other parties thereto) constitute valid and binding obligations of
Seller, enforceable against Seller in accordance with their respective terms,
except as enforcement may be limited by general principles of equity, whether
applied in a court of law or a court of equity, and by bankruptcy, insolvency,
moratorium and similar laws affecting creditors' rights and remedies generally.

          (b) Neither the execution and delivery of this Agreement and the Tax
Agreement by Seller, nor the consummation by Seller of the transactions
contemplated hereby and thereby to be performed by it, nor compliance by Seller
with any of the terms or provisions hereof or thereof, will (i) violate any
provision of the Certificate of Incorporation or By-Laws of Seller or the
Company, or (ii) assuming that the consents and approvals referred to in Section
4.4 are duly obtained, (A) violate in any material respect any Applicable Law
with respect to Seller, the Company or the Subsidiaries, or any of their
respective material properties or assets, (B) result in the creation of any
Encumbrance upon any of the Shares, or (C) violate, conflict with, result in a
breach of any provision of, or constitute a default (with or without notice or
lapse of time, or both) under, or give rise to a right of termination,
cancellation or acceleration of any obligation or loss of a material benefit
under, or require the consent of any Person under, or result in the imposition
of any Encumbrance on any of the properties or assets of the Company under, any
note, bond, mortgage, indenture, deed of trust, license, lease, agreement or
other instrument or obligation to which Seller, the Company or the Subsidiaries
is a party, or by which Seller, the Company or the Subsidiaries, or any of their
respective properties or assets, may be bound or affected, except for such
Encumbrances, violations, conflicts, breaches or defaults which would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.

          (c)  Parent has full corporate power and authority to execute and
deliver the Ancillary Agreements and to consummate the transactions contemplated
thereby.  The execution and delivery of the Ancillary Agreements and the
consummation of the transactions contemplated thereby have been duly and validly
approved by all requisite corporate action on the part of Parent, and no other
corporate proceedings on the part of Parent are necessary to approve the
Ancillary Agreements or to consummate the transactions contemplated thereby.
The Tax Agreement has been duly and validly executed and delivered by Parent and
(assuming the due authorization, execution and delivery of the Tax Agreement by
Buyer and any other parties thereto) constitutes a valid and binding obligation
of Parent, enforceable against Parent in accordance with its terms, except as
enforcement may be limited by general principles of equity, whether applied in a
court of law or a court of equity, and by bankruptcy, insolvency, moratorium and
similar laws affecting creditors' rights and remedies generally.  Subject to the
occurrence of the Closing, the Guarantee and the Ridge Re Amendment will be duly
and validly executed and delivered by Parent and the Guarantee and the Ridge Re
Agreement, as amended by the Ridge Re Amendment (assuming the due authorization,
execution and delivery of the Ridge Re Amendment by the other parties thereto),
will constitute valid and binding obligations of Parent, enforceable against
Parent in accordance with their respective terms, except as enforcement may be
limited by general principles of equity, whether applied in a court of law or a
court 

                                      -11-
<PAGE>
 
of equity, and by bankruptcy, insolvency, moratorium and similar laws affecting
creditors' rights and remedies generally.

          (d) Neither the execution and delivery of the Ancillary Agreements by
Parent, nor the consummation by Parent of the transactions contemplated thereby
to be performed by it, nor compliance by Parent with any of the terms or
provisions thereof, will (i) violate any provision of the Certificate of
Incorporation or By-Laws of Parent or (ii) violate in any material respect any
Applicable Law with respect to Parent, or any of its material properties or
assets.

          (e) Ridge Re is duly organized, validly existing and in good standing
under the laws of Bermuda and has full corporate power and authority to enter
into, and fulfill its obligations under, the Ridge Re Agreement (as amended by
the Ridge Re Amendment) in accordance with its terms.  Parent owns of record and
beneficially all the outstanding capital stock of Ridge Re.

          (f) Each of Ridge Re and each Insurance Subsidiary has full corporate
power and authority to enter into the Ridge Re Amendment and has taken all
requisite corporate action to consummate the transactions contemplated thereby
and to perform its obligations thereunder.  Subject to the occurrence of the
Closing, the Ridge Re Amendment will be duly and validly executed and delivered
by Ridge Re and the Insurance Subsidiaries and the Ridge Re Agreement, as
amended by the Ridge Re Amendment (assuming the due authorization, execution and
delivery of the Ridge Re Amendment by the other parties thereto), will
constitute a legal, valid and binding obligation of Ridge Re, enforceable
against Ridge Re in accordance with its terms, except as enforcement may be
limited by general principles of equity, whether applied in a court of law or a
court of equity, and by bankruptcy, insolvency, moratorium and similar laws
affecting creditors' rights and remedies generally.

          Section 4.4  Consents and Approvals.  Except for (i) the approval of
                       ----------------------                                 
this Agreement, the Ancillary Agreements and the transactions contemplated
hereby and thereby, and the new intercompany tax agreements among the Company
and the Subsidiaries which shall be effective as of the Closing, by each of the
applicable governmental and regulatory authorities listed on Schedule 4.4, (ii)
the approval of this Agreement, the Ancillary Agreements and the transactions
contemplated hereby and thereby, and the new intercompany tax agreements among
the Company and the Subsidiaries which shall be effective as of the Closing, by
any other governmental or regulatory authorities, the failure of which to obtain
would not, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect, (iii) the filing of premerger notification reports
under the HSR Act, (iv) the filing of a notice pursuant to the Exon-Florio
Amendment, and (v) consents, approvals, authorizations, declarations, filings
and registrations required by the nature of the business or ownership of Buyer,
no consent, approval or authorization of, or declaration, filing or registration
with, any governmental or regulatory authority, or any other Person, is required
to be made or obtained by Parent, Seller, Ridge Re, the Company or any
Subsidiary on or prior to the Closing Date in connection with the execution or
delivery of this Agreement or any of the Ancillary Agreements, the performance
of this Agreement or any Ancillary Agreement, or the consummation of the
transactions contemplated hereby and thereby.

          Section 4.5  Stock Ownership.  Seller owns beneficially and of record
                       ---------------                                         
all of the Shares to be sold to Buyer by Seller, and Seller has full corporate
power and authority to sell, assign, transfer and deliver the Shares to Buyer
upon the terms and subject to the conditions of this Agreement free and clear of
all Encumbrances.  The Company has authorized 1,000 shares of common stock,
$1.00 par value, 1,000 shares of which are issued and outstanding, and no shares
of any other class or series of capital stock are authorized, issued or
outstanding.  Upon consummation of the transactions contemplated by this
Agreement, Buyer will have good and valid title to such Shares, free and clear
of all Encumbrances. All of the Shares are duly authorized, validly issued,
fully paid, nonassessable and free of any preemptive rights.

                                      -12-
<PAGE>
 
There is no outstanding option, warrant, right, subscription, call, unsatisfied
preemptive right or other agreement or right of any kind to purchase or
otherwise acquire from the Company or Seller any capital stock of the Company.

          Section 4.6  Financial Statements.  (a) Seller has heretofore
                       --------------------                            
delivered to Buyer the Company GAAP Financial Statements, the Ridge Re GAAP
Financial Statements, the Company Interim Financial Statements, the Ridge Re
Interim Financial Statements and the Convention Statements.  Except as otherwise
set forth therein, (i) the Company GAAP Financial Statements are based on the
books and records of the Company and its Subsidiaries, fairly present in all
material respects the financial condition and consolidated results of operations
of the Company and its Subsidiaries, as of the dates and for the periods
indicated therein, have been prepared in accordance with GAAP (as in effect at
the time of the respective financial statements) consistently applied, and have
been audited by KPMG Peat Marwick LLP and (ii) the Ridge Re GAAP Financial
Statements are based on the books and records of Ridge Re, fairly present in all
material respects the financial condition and results of operation of Ridge Re,
as of the dates and for the periods indicated therein, have been prepared in
accordance with GAAP (as in effect at the time of the respective financial
statements) consistently applied, and have been audited by KPMG Peat Marwick.
The Company Interim Financial Statements and the Ridge Re Interim Financial
Statements were prepared in the ordinary course of business and have been
prepared on a consistent basis through the periods indicated and in a manner
consistent with that employed in the Company GAAP Financial Statements and the
Ridge Re GAAP Financial Statements, as the case may be.  The Company Interim
Financial Statements and the Ridge Re Interim Financial Statements do not
contain footnote disclosures and are subject to normal recurring year-end
adjustments, but otherwise fairly present in all material respects the financial
condition and results of operations of the Company and Ridge Re, as the case may
be, as of the dates and for the periods indicated therein except as otherwise
set forth therein.

          (b) Seller has previously furnished Buyer with copies of audited
statutory financial statements of each of the Insurance Subsidiaries as of
December 31, 1996, 1995 and 1994, together with all exhibits and schedules
thereto, and any actuarial opinion, affirmation or certification filed in
connection therewith, prepared in conformity with the statutory accounting
practices prescribed or permitted by the respective state of domicile for each
Insurance Subsidiary (collectively, the "SAP Financial Statements").  Each of
the balance sheets included in the SAP Financial Statements fairly presents in
all material respects the financial position of the applicable Insurance
Subsidiary as of its date and each of the statements of operations included in
the SAP Financial Statements fairly presents in all material respects the
results of operations of the applicable Insurance Subsidiary for the period
therein set forth, in each case prepared in conformity with the statutory
accounting practices prescribed or permitted by the respective state of domicile
for each Insurance Subsidiary.

          Section 4.7  No Other Broker.  Other than Morgan Stanley & Co.
                       ---------------                                  
Incorporated, the fees and expenses of which will be paid by Seller, no broker,
finder or similar intermediary has acted for or on behalf of Seller or the
Company or the Subsidiaries, or is entitled to any broker's, finder's or similar
fee or other commission from Seller, the Company or the Subsidiaries in
connection with this Agreement or the transactions contemplated hereby.

          Section 4.8  Legal Proceedings.  As of the date hereof, other than
                       -----------------                                    
Actions arising from or related to the obligations of any Subsidiary under any
insurance policy or similar instrument written, assumed or reinsured by such
Subsidiary, (a) neither the Company nor any of its Subsidiaries is a party to
any, and there are no pending or, to the knowledge of Seller, threatened,
Actions against or otherwise affecting the Company, any of its Subsidiaries or
any of their respective properties or assets or challenging the validity or
propriety of the transactions contemplated by this Agreement which, if
adversely determined, would, individually or in the aggregate, reasonably be
expected to have a Material Adverse 

                                      -13-
<PAGE>
 
Effect, and (b) there is no injunction, order, judgment, decree or regulatory
restriction imposed upon the Company, any of its Subsidiaries or any of their
respective properties or assets which (i) has been issued by any insurance
regulatory authority, (ii) would restrict the ability of the Company to conduct
its business in the ordinary course of business consistent with past practice or
(iii) has had or would reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect. Schedule 4.8 sets forth a true and
complete list, as of the date hereof, of all pending litigation against the
Company or any Subsidiary which (A) does not relate to any liability arising
from insurance policies or similar instruments or (B) alleges "bad faith."

          Section 4.9  Undisclosed Liabilities.  (a) As of the date hereof,
                       -----------------------                             
except for (i) those liabilities or items set forth on Schedule 4.9, (ii) those
liabilities that are reflected or reserved against on the audited balance sheet
of the Company as of December 31, 1996 (the "Latest Balance Sheet"), and (iii)
liabilities incurred in the ordinary course of business consistent with past
practice since the date of such balance sheet, no liabilities, debts, claims or
obligations of any nature, whether accrued, absolute, direct or indirect,
contingent or otherwise, whether due or to become due, that would be required to
be included on a balance sheet to be prepared in accordance with GAAP, have been
incurred by the Company or the Subsidiaries (and, to the knowledge of Seller,
there is no existing condition or set of circumstances which would reasonably be
expected to result in such a liability) other than those that would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.

          (b) Each of the Company and each Subsidiary has paid in full all
guaranty fund assessments required by any regulatory authority to be paid by it
prior to the date of this Agreement.  As of the date of this Agreement, except
as set forth on Schedule 4.9 and except as and to the extent reserved against in
the Convention Statements or disclosed in the notes thereto, the Company and the
Subsidiaries have not received any guarantee fund assessments.

          Section 4.10  Compliance with Applicable Law; Insurance Operations.
                        ----------------------------------------------------  
(a)  Each of the Company and its Subsidiaries holds in full force and effect all
material licenses, franchises, permits and authorizations ("Permits") necessary
for the lawful ownership and use of their respective properties and assets and
the conduct of their respective businesses (as now conducted) under and pursuant
to Applicable Laws relating to the Company and its Subsidiaries and, to the
knowledge of Seller, there has been no violation of any Permit, nor has Seller
received written notice asserting any such violation, except for such failures
to be in full force and effect and for such violations, if any, which would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Except as set forth on Schedule 4.10 and except as provided in
Applicable Law (including without limitation any requirements for relicensure of
insurance companies), the consummation of the transactions contemplated by this
Agreement will not result in any revocation, cancellation or suspension of any
such Permit, except as a result of the status of Buyer and its Affiliates, and
there are no pending or, to the knowledge of Seller, threatened suits,
proceedings or investigations with respect to revocation, cancellation,
suspension or nonrenewal thereof and there has occurred no event which (whether
with notice or lapse of time or both) will result in such a revocation,
cancellation, suspension or nonrenewal thereof, in any such case except where
such a revocation, cancellation, suspension or non-renewal would not,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.

          (b) Except as set forth on Schedule 4.10, each of the Company and its
Subsidiaries is in compliance with each Applicable Law relating to it or any of
its material assets, properties or operations, except where noncompliance with
any such Applicable Law would not, individually or in the aggregate, reasonably
be expected to have a Material Adverse Affect.

                                      -14-
<PAGE>
 
          (c) Each of the Insurance Subsidiaries (i) is an authorized insurer
(on either an admitted or a nonadmitted basis) in each state in which it
presently writes insurance for the type of insurance it presently writes in such
states and (ii) meets in all material respects all statutory and regulatory
requirements of all Governmental Authorities which have jurisdiction over it to
be an authorized insurer on either an admitted or a nonadmitted basis.

          (d) Seller has previously made available to Buyer true and complete
copies of the reports (or the most recent draft thereof, to the extent any final
report is not available) reflecting the results of the most recent financial
examinations and market conduct examinations of any of the Insurance
Subsidiaries issued by any Insurance Regulator.

          Section 4.11  Absence of Certain Changes.  Since December 31, 1996,
                        --------------------------                           
except as set forth on Schedule 4.11 or as is expressly contemplated by this
Agreement, the Berkshire Hathaway Reinsurance Agreement or an Ancillary
Agreement, or as would not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect, the Company has conducted its
business in the ordinary course of business, consistent with past practice and
has not:

          (a) entered into any new lines of business (whether or not part of the
     insurance or reinsurance business), made, or permitted any Subsidiary to
     make, any material change in the underwriting, reinsurance, marketing,
     claim processing and payment, reserving, investment, financial or
     accounting practices or policies of the Company or any of its Subsidiaries
     or otherwise make material changes to the operations of the business,
     except as required by law, GAAP or the statutory accounting practices of
     the respective state of domicile of any such entity;

          (b) made any, or permitted any Subsidiary to make any, (i) entry into
     or modification of any reinsurance, coinsurance or retrocession agreement
     by the Company or any of its Subsidiaries other than in the ordinary course
     of business consistent with past practice, or (ii) termination or
     commutation of any reinsurance, coinsurance or retrocession agreement
     legally carried on the books of the Subsidiaries at the time of such
     termination or commutation involving payments of $1,000,000 or more;

          (c) issued or sold, or permitted any Subsidiary to issue or sell, any
     capital stock, notes, bonds or other securities, or any option, warrant or
     other right to acquire the same;

          (d) other than the $451,527 dividend paid to Seller in the first
     quarter of 1997, redeemed any capital stock or declared, made or paid any
     dividends or distributions (whether in cash, securities or other property)
     to the holders of capital stock;

          (e) merged with, entered into a consolidation with or acquired an
     interest of 5% or more in any Person or acquired a substantial portion of
     the assets or business of any Person or any division or line of business
     thereof, or otherwise acquired any assets (other than fixed maturity
     securities, equity securities, cash and short-term investments) with an
     aggregate value in excess of $250,000 other than in the ordinary course of
     the business consistent with past practice, or permitted any Subsidiary to
     do any of the foregoing;

          (f) made, or permitted any Subsidiary to make, any capital expenditure
     or commitment for any capital expenditure in excess of $250,000 in the
     aggregate with respect to any such entity;

                                      -15-
<PAGE>
 
          (g) incurred, or permitted any Subsidiary to incur, indebtedness for
     money borrowed in excess of $250,000 in the aggregate;

          (h) made any loan to, guaranteed any indebtedness for money borrowed
     of, or otherwise incurred such indebtedness on behalf of, any Person in
     excess of $250,000 in the aggregate other than investments made in the
     ordinary course of business, or permitted any Subsidiary to do any of the
     foregoing;

          (i) (i) granted any increase, or announced any increase, in the wages,
     salaries, compensation, bonuses, incentives, severance, pension or other
     benefits payable to any of its employees who in the preceding 12 months
     received compensation in excess of $100,000, including, without limitation,
     any increase or change pursuant to any Plan, (ii) established or increased
     or promised to increase any benefits under any Plan, in either case except
     as required by law, rule or regulation or any collective bargaining
     agreement or involving ordinary increases consistent with past practice,
     (iii) entered into any employment, severance or termination agreement with
     any such officer or employee, or (iv) permitted any Subsidiary to do any of
     the foregoing;

          (j) amended or restated, or permitted any Subsidiary to amend or
     restate, its charter or by-laws (or other organizational documents);

          (k) except as expressly required herein, paid, discharged or satisfied
     any claims, liabilities or obligations (absolute, accrued, contingent or
     otherwise), other than the payment, discharge or satisfaction in the
     ordinary course of business and consistent with past practice of
     liabilities reflected or reserved against on the Latest Balance Sheet or
     incurred in connection with the transactions contemplated by this Agreement
     or in the ordinary course of business and consistent with past practice;

          (l) adopted a plan of complete or partial liquidation or resolutions
     providing for the complete or partial liquidation, dissolution,
     amalgamation, consolidation, restructuring, recapitalization or other
     reorganization of the Company;

          (m) except as set forth on Schedule 4.17, acquired investments which
     are not rated in one of the four highest categories by a "nationally
     recognized statistical rating agency" as defined in the rules or
     regulations of the Securities and Exchange Commission;

          (n) sold (whether by merger, consolidation or otherwise), leased,
     created any Encumbrance with respect to, transferred or disposed of any
     material assets of the Company (including without limitation the Shares and
     rights of renewal) outside the ordinary course of business consistent with
     past practice or entered into any material commitment or transaction
     outside the ordinary course of business consistent with past practice;

          (o) made any Tax elections or settled or compromised any material
     United States federal, state, local or other foreign income tax liability,
     or waived or extended the statute of limitations in respect of any such
     Taxes;

          (p) other than in the ordinary course of business consistent with past
     practice, paid or agreed to pay in settlement or compromise of any suits or
     claims of liability against the Company, its directors, officers, employees
     or agents, more than an aggregate of $100,000 for all such suits and
     claims;

                                      -16-
<PAGE>
 
          (q) entered into any agreement providing for the acceleration of
     payment or performance or other consequence as a result of a change in
     control of the Company;

          (r) made any prepayment of any liabilities, other than in the ordinary
     course of business consistent with past practice, individually or in the
     aggregate exceeding $250,000;

          (s) as of the date hereof, suffered any damage, destruction, or other
     casualty (whether or not covered by insurance) affecting any of the assets
     and properties of the Company or any of its Subsidiaries which damage,
     destruction, or loss individually or in the aggregate exceeds $250,000 or
     the result of which individually or in the aggregate exceeds $250,000;

          (t) made any amendment, termination, waiver, disposal, or lapse of, or
     other failure to preserve, any license or other form of authorization of
     the Company or any of its Subsidiaries, which is material to the conduct of
     the business of the Company and its Subsidiaries, taken as a whole; or

          (u) agreed, whether in writing or otherwise, to take any of the
     actions specified in this Section, except as expressly contemplated by this
     Agreement.

          Section 4.12  Technology and Intellectual Property.  (a)  Except as
                        ------------------------------------                 
set forth on Schedule 4.12, the Company or its Subsidiaries own or possess, or
have enforceable rights or licenses to use, the patents, trademarks, service
marks, trade names, copyrights (including any registrations, applications,
licenses or rights relating to any of the foregoing), technology, trade secrets,
inventions, know-how and computer programs which are necessary to carry on their
respective businesses as presently conducted (each, an "Intellectual Property
Right"), and neither the Company nor its Subsidiaries has received any written
notice of any infringement of the rights of others with respect to any such
Intellectual Property Right that, if such infringement is determined to be
unlawful, would, individually or in the aggregate, reasonably be expected to
have a Material Adverse Effect.  The execution and delivery of this Agreement by
Seller, and the consummation of the transactions contemplated hereby, will
neither cause the Company or any of its Subsidiaries to be in violation or
default under any licenses, sublicenses or other agreements to which the Company
or any of its Subsidiaries is a party and pursuant to which the Company or any
of its Subsidiaries is authorized to use any Intellectual Property Right, nor
entitle any other party to any such license, sublicense or agreement to
terminate or modify such license, sublicense or agreement, except where any such
violation, default, termination or modification would not, individually or in
the aggregate, reasonably be expected to have a Material Adverse Effect.  Except
as set forth on Schedule 4.12, Parent, Seller and their Affiliates (other than
the Company and the Subsidiaries) have no right or title to or interest in any
Intellectual Property Right.   Schedule 4.12 sets forth a complete and correct
list, as of the date hereof, and a brief description of, the Intellectual
Property Rights that are material to the Company or any Subsidiary.

          (b) To the knowledge of Seller, no use of any Intellectual Property
Right by the Company or any Subsidiary breaches, violates or infringes any
rights of any third party or (except for the payment of computer software
licensing fees) requires any payment for the use of any patent, trade name,
service mark, trade secret, trademark, copyright or other intellectual property
right or technology owned by any third party.

          Section 4.13  Employee Benefit Plans; ERISA.  (a)  Except as set forth
                        -----------------------------                           
on Schedule 4.13, neither Seller, the Company, nor any of the Subsidiaries is a
party to, participates in or has any obligation under, and neither Seller, the
Company, nor any of the Subsidiaries has any obligation with respect to Company
Employees or any other current or former employees of the Company or its
Subsidiaries under,

                                      -17-
<PAGE>
 
(A) any "employee welfare benefit plan" or "employee pension benefit plan" (as
those terms are respectively defined in Section 3(1) and 3(2) of ERISA), (B) any
retirement or deferred compensation plan, incentive compensation plan, stock
plan, unemployment compensation plan, vacation pay, severance pay, bonus or
benefit arrangement, insurance or hospitalization program or any other fringe
benefit arrangements for any current or former employee, director, consultant or
agent, whether pursuant to contract, arrangement, custom or informal
understanding, which does not constitute an employee benefit plan (as defined in
Section 3(3) of ERISA), or (C) any employment agreement.

          (b) A true and correct copy each of the plans, arrangements and
agreements set forth on Schedule 4.13 (the "Plans") and copies of all related
trust agreements, schedules, benefit entitlement letters, insurance contracts
(including "stop-loss" policies), and administration contracts, each as in
effect on the date hereof, have been supplied to Buyer.  In the case of any Plan
which is not in written form, Buyer has been supplied with an accurate
description of such Plan as in effect on the date hereof.  A true and correct
copy of the most recent annual report, actuarial report, summary plan
description and IRS determination letter with respect to each Plan, to the
extent applicable, has been supplied to Buyer, and there have been no material
adverse changes in the financial condition of the respective Plans from that
stated in the annual reports and actuarial reports supplied.

          (c)  As to all Plans:

               (i)  All Plans comply, and have been administered in form and in
     operation in all respects, with all applicable requirements of Applicable
     Law and, as of the date hereof, no event has occurred which will or would
     reasonably be expected to cause any such Plan to fail to comply with such
     requirements and, as of the date hereof, no notice has been issued by any
     governmental authority questioning or challenging such compliance, except
     where any such noncompliance would not, individually or in the aggregate,
     reasonably be expected to have a Material Adverse Effect.

               (ii) All Plans which are employee pension benefit plans and are
     intended to be tax-qualified plans comply in form and in operation in all
     material respects with all applicable requirements of Sections 401(a) and
     501(a) of the Code; there have been no amendments to such Plans which are
     not the subject of a favorable determination letter issued with respect
     thereto by the IRS, except for those amendments of which copies have been
     provided to Buyer prior to the date hereof and, as of the date hereof, no
     event has occurred which will or would reasonably be expected to give rise
     to disqualification of such Plan under such Sections or to a tax under
     Section 511 of the Code, except where any such disqualification would not,
     individually or in the aggregate, reasonably be expected to have a Material
     Adverse Effect.

          (d) Except as set forth on Schedule 4.13, neither Seller, the Company
nor any of the Subsidiaries has any commitment, intention or understanding to
create, modify, terminate or adopt any Plan that would result in any additional
material liability to Buyer, the Company or the Subsidiaries.

          (e) Neither Seller, the Company, any of their Subsidiaries nor any
ERISA Affiliate maintains, has any obligation to contribute to or otherwise has
any obligation under any multiemployer plan (as defined in Section 3(37) of
ERISA).

          (f) Neither Seller, the Company nor any of their Subsidiaries
maintains, has any obligation to contribute to, is a party to, or has any
liability or contingent or potential liability under any "voluntary employees'
beneficiary association" (within the meaning of Section 501(c)(9) of the Code).

                                      -18-
<PAGE>
 
          (g) Except as set forth on Schedule 4.13, the execution and delivery
of this Agreement and the performance of the transactions contemplated by this
Agreement will not (either alone or upon the occurrence of any additional or
subsequent events) constitute an event under any Plan or agreement that will or
would reasonably be expected to result in (i) any payment (whether of severance
pay or otherwise), acceleration, vesting or increase in benefits with respect to
any Company Employee or (ii) an "excess parachute payment" (within the meaning
of Section 280G of the Code).

          (h) Except as set forth on Schedule 4.13, Seller shall remain solely
liable for all liabilities, benefits or claims with respect to Company Employees
accrued pursuant to any Plan which is a pension plan under Section 3(2)(A) of
ERISA and which is not intended to be qualified under Section 401(a) of the
Code.  The accrued liabilities of the Company and its Subsidiaries under the
SIRP with respect to Company Employees, and the assets associated therewith, are
reflected on the financial statements of the Company and its Subsidiaries, and
such assets are substantially equal to such accrued liabilities.

          (i) From and after the Closing, Buyer, the Company and the
Subsidiaries may terminate or amend any Plan maintained solely by the Company or
its Subsidiaries; provided, however, that Buyer shall pay or cause the Company
or its Subsidiaries to pay, benefits in accordance with the terms of the
Enhanced Severance Benefit Plan of Westchester Fire Insurance Company as in
effect on the day before the Closing Date.

          (j) None of the assets of any Plan (other than the ESOP maintained by
Xerox) is invested in employer securities or employer real property.

          (k) There have been no non-exempt "prohibited transactions" (as
described in Section 406 of ERISA or Section 4975 of the Code) with respect to
any Plan and neither the Company nor any of its Subsidiaries has engaged in any
non-exempt prohibited transaction which (in either case) would reasonably be
expected to result in a material fine or penalty under Section 502 of ERISA or
Section 4975 of the Code.

          (l) There have been no acts or omissions with respect to any Plan by
the Company which have given rise to or would reasonably be expected to give
rise to material fines, penalties, taxes of related charges under Section 502 of
ERISA or Chapters 43, 47 or 68 of the Code for which the Company would
reasonably be expected to be liable.

          (m) There are no material actions, suits or claims (other than routine
claims for benefits) pending or, to the knowledge of Seller, threatened
involving any Plan or the assets thereof and no facts exist which would
reasonably be expected to give rise to any such actions, suits or claims (other
than routine claims or benefits).

          (n) Except as set forth on Schedule 4.13, none of the Plans is subject
to Title IV of ERISA, and the Company does not have any material liability or
contingent liability with respect to any Plan that is or has been subject to
Title IV of ERISA.

          (o) Each Plan which constitutes a "group health plan" (as defined in
Section 607(1) of ERISA or Section 4980B(g)(2) of the Code), including any plans
of current and former subsidiaries of Seller which must be taken into account
under Sections 4980B and 414(t) of the Code or Section 601 of ERISA, has been
operated in material compliance with Applicable Law, including coverage
requirements of Section 4980B of the Code and Section 601 of ERISA to the extent
such requirements are applicable. The number of Company Employees, or other
individuals who are or were related to or dependents of

                                      -19-
<PAGE>
 
Covered Employees, receiving continuation coverage under Section 4980B of the
Code or Section 601 of ERISA was nine as of July 18, 1997.

          (p) Except as set forth on Schedule 4.13, the Company and its
Subsidiaries do not have any liability or contingent liability for providing,
under any Plan or otherwise, any post-retirement medical or life insurance
benefits, other than statutory liability for providing group health plan
continuation coverage under Part 6 of Title I of ERISA and Section 4980B of the
Code.

          (q) Actuarially adequate accruals for all obligations of the Company
and its Subsidiaries under the Plans are reflected in the financial statements
of the Company and its Subsidiaries and such obligations include a pro rata
amount of the contributions which would otherwise have been made in accordance
with past practices and Applicable Law for the plan years which include the
Closing Date.

          (r) No compensation which the Company or its Subsidiaries has paid or
is obligated to pay to any employee is nondeductible on account of Section
162(m) of the Code.

          Section 4.14  Taxes.  (a)  Seller and the Company (and any affiliated
                        -----                                                  
group of which the Company is a member) have timely filed with the appropriate
taxing authorities all federal and, to the knowledge of Seller, state and local
Tax Returns and Information Returns required to be filed through the date hereof
(taking into account all valid extensions).  All such federal and, to the
knowledge of Seller, state and local Tax Returns and Information Returns are
complete and accurate in all material respects. The Company is a member of an
affiliated group of corporations, within the meaning of Section 1504 of the
Code, that includes Seller, Parent and Xerox Corporation ("Xerox"), which is the
common parent of the affiliated group.

          (b) All Taxes shown in the Tax Returns referred to in Section 4.14(a)
that are due and payable by the Company and its Subsidiaries before the date
hereof have been timely paid.

          (c) Except as set forth on Schedule 4.14, there are no Encumbrances on
any of the assets of the Company or any of its Subsidiaries that arose in
connection with any failure (or alleged failure) to pay any Taxes (other than
Taxes that are not due as of the date hereof).

          (d) Except as set forth on Schedule 4.14, to the knowledge of Seller,
there is no action, suit, proceeding, investigation, audit, extensions of the
statute of limitations or claim now pending that relates to Tax liabilities
attributable to items of income, gain, deduction, loss or credits of the Company
or any of its Subsidiaries.

          (e) The Company and the Subsidiaries have withheld and paid all
federal and, to the knowledge of Seller, all state and local Taxes required to
have been withheld and paid in connection with amounts paid or owing to any
employee, independent contractor, creditor, stockholder or other third party.

          (f) A representation with respect to Taxes contained in this Section
4.14 shall be deemed to be accurate unless an inaccuracy contained therein
would, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect.

          Section 4.15  Contracts. (a) Schedule 4.15(a) sets forth a complete
                        ---------                                            
and accurate list, as of the date hereof, of all contracts, agreements,
commitments, arrangements, leases, insurance policies or other instruments,
written or oral, to which the Company or any of its Subsidiaries is a party
(excluding policies of insurance or reinsurance in the ordinary course of
business), or by which any of their respective

                                      -20-
<PAGE>
 
assets, business or operations may be bound or affected, which contain
obligations of the Company or its Subsidiaries in excess of $250,000 in any one
fiscal year or $500,000 in the aggregate in any five year period (unless such
contract is terminable on not more than one year's notice without cause and
payment of penalty) or which are otherwise necessary or material to the business
of the Company and its Subsidiaries taken as a whole (collectively, the
"Contracts").

          (b)    Except as set forth on Schedule 4.15(b), as of the date hereof
none of the Company or any of its Subsidiaries is a party to or owner of any:

          (i)    agreement, contract, commitment or undertaking (other than
     contracts of insurance or reinsurance or retrocession agreements) the
     performance or non-performance of which is individually or, with respect to
     any related series of agreements, in the aggregate, material to the Company
     and the Subsidiaries, taken as a whole;

          (ii)   agreement, contract, commitment or undertaking (other than
     contracts of insurance or reinsurance or retrocession agreements) which
     provides for an aggregate purchase price or payments of more than $100,000
     under any agreement during any two-year period (or $100,000 in the
     aggregate, during any two-year period, in the case of any related series of
     agreements);

          (iii)  agreement for the sale or lease of any of the assets and
     properties of the Company or any of its Subsidiaries other than in the
     ordinary course of business consistent with past practice;

          (iv)   material mortgage, pledge, conditional sales contract, security
     agreement, factoring agreement, or other similar material agreement with
     respect to any real or personal property of the Company or any of its
     Subsidiaries;

          (v)    agreement with a labor union or labor association;

          (vi)   loan agreement, promissory note issued by it, guarantee,
     subordination or similar type of agreement;

          (vii)  noncompetition or non-solicitation agreement;

          (viii) power of attorney or agreement with a managing general agent
     or third party administrator; or

          (ix)   support agreement, guarantee or other agreement for the benefit
     of any Affiliate of the Company (including any Affiliate of Seller).

          (c)    With respect to each Contract and each contract set forth on
Schedule 4.15(b) (each a "Section 4.15(b) Contract"), (i) to the knowledge of
Seller, assuming the due authorization, execution and delivery thereof by the
other party or parties thereto, such Contract or Schedule 4.15(b) Contract is
valid and binding in all material respects in accordance with its terms and is
in full force and effect, (ii) the Company and its Subsidiaries are not, and, to
the knowledge of Seller, no other party thereto is, in default in the
performance, observance or fulfillment of any obligation, covenant or condition
contained therein except where such defaults would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect and (iii) to
the knowledge of Seller, no event has occurred which, with or without the giving
of notice or lapse of time, or both, would constitute a default thereunder

                                      -21-
<PAGE>
 
except where such defaults would not, individually or in the aggregate,
reasonably be expected to have a Material Adverse Effect. Except as set forth on
Schedule 4.15(a) or 4.15(b), no Contract or Schedule 4.15(b) Contract requires
the consent of any party in connection with the transactions contemplated
hereby.

          Section 4.16  No Material Adverse Change.  Except as set forth on
                        --------------------------                         
Schedule 4.16, since December 31, 1996, there has been no change in the
business, operations, assets, liabilities, condition (financial or otherwise) or
results of operations of the Company and its Subsidiaries which has had or would
reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect; provided, however, to the extent such effect results from any of
the following, such effect shall not be considered a Material Adverse Effect for
purposes of this Section 4.16:  (i) general conditions applicable to the economy
of the United States, including changes in interest rates, (ii) conditions
affecting the property and casualty insurance or reinsurance business as a
whole, or (iii) conditions or effects resulting from the announcement of the
existence and terms of this Agreement.

          Section 4.17  Portfolio Investments.  Seller has previously delivered
                        ---------------------                                  
to Buyer true and complete lists, as of July 31, 1997, of all assets held in the
investment portfolios of the Company and its Subsidiaries as of such date and
has attached such lists hereto as Schedule 4.17.   All such assets included in
such investment portfolios were purchased by the Company or a Subsidiary in
compliance with Applicable Law.

          Section 4.18  Reserves.  Seller has delivered to Buyer a true and
                        --------                                           
complete copy of that certain report entitled "Westchester Specialty Group, Inc.
Review of Loss and Loss Adjustment Expense Reserves as of December 31, 1996"
(the "KPMG Report").  The Ridge Re Agreement is in full force and effect.
Notwithstanding any other provision of this Agreement (including Sections 4.6
and 4.9), Seller makes no representation or warranty that the reserves of the
Company or any of its Subsidiaries for losses, loss adjustment expenses or
uncollectible reinsurance are adequate or sufficient.  The sole provisions of
this Agreement with respect to the adequacy or sufficiency of such reserves are
set forth in this Section 4.18.

          Section 4.19  Title to Assets, etc.  The Company and its Subsidiaries
                        ---------------------                                  
have good and marketable title to, or valid and subsisting leasehold interests
in, all real and material personal property and other material assets on their
books and reflected on the Company's balance sheet at December 31, 1996 or
acquired in the ordinary course of business since December 31, 1996 which would
have been required to be reflected on such balance sheet if acquired on or prior
to December 31, 1996, other than assets which have been disposed of in the
ordinary course of business.  The Company and its Subsidiaries do not own any
real estate.  Schedule 4.19 sets forth a true and complete listing, as of the
date hereof, of all real estate leases or subleases to which the Company or any
of its Subsidiaries is a party.  None of such assets is subject to any
Encumbrance, except for Encumbrances reflected in the financial statements of
the Company as of December 31, 1996 or which in the aggregate are not
substantial in amount or do not materially interfere with the present use of
such property or assets.  Assuming the due authorization, execution and delivery
of all such leases by the other parties thereto, all such leases are valid,
binding and enforceable against the Company (and, to the knowledge of Seller,
against each other party thereto) in accordance with their respective terms,
and, to the knowledge of Seller, there does not exist, under any lease of real
property or personal property, any material defect or any event which, with
notice or lapse of time or both, would constitute a material default by the
Company or by any other party thereto. Except as would not, individually or in
the aggregate, reasonably be expected to have a Material Adverse Effect, the
Company and its Subsidiaries have the right to quiet enjoyment of all real
property leased by any of them for the full term of each such lease or sublease
or similar agreement (or any renewal option) relating thereto and such leased
property is not subject to any failure to have the right to quiet enjoyment.

                                      -22-
<PAGE>
 
          Section 4.20  Transactions with Certain Persons.   (a)  Except as set
                        ---------------------------------                      
forth on Schedule 4.20, neither any officer, director or employee of Parent,
Seller, the Company, any Subsidiary or any Affiliate nor any member of any such
Person's immediate family is presently a party to any material transaction with
the Company or any of its Subsidiaries which would be required to be disclosed
under Item 404 of Regulation S-K promulgated by the Securities and Exchange
Commission, including any contract or other binding arrangement (i) providing
for the furnishing of material services by such Person (except in such Person's
capacity as an officer, director, employee or consultant), (ii) providing for
the rental of material real or personal property from such Person, or (iii)
otherwise requiring material payments to (other than for services as officers,
directors or employees of Xerox, Parent, Seller, the Company or any Subsidiary)
such Person.

          (b) Except as set forth on Schedule 4.20 or in the ordinary course of
business consistent with past practice, since December 31, 1996 no intercompany
trade receivables and payables have been settled between Seller or any Affiliate
(other than the Company and its Subsidiaries) on the one hand and the Company
and/or any Subsidiary on the other hand.

          (c) Schedule 4.20 sets forth a true and complete list of all written
(and a true and complete summary of all oral) contracts, agreements or
commitments between the Company or any of its Subsidiaries and Xerox or any
Affiliate (other than the Company and its Subsidiaries) thereof as of the date
of this Agreement which (i) cannot be terminated upon less than 30 days' notice,
and (ii) require payments annually of more than $250,000.

          (d) Except as set forth on Schedule 4.20, no indebtedness for money
borrowed is owed by the Company or any of its Subsidiaries to Seller or any of
its Affiliates (except for the Company and its Subsidiaries).

          Section 4.21  Reinsurance and Retrocessions.  Schedule 4.21 contains a
                        -----------------------------                           
true and complete list of all reinsurance and retrocession treaties and
agreements in force as of the date of this Agreement to which any Subsidiary is
a ceding party (including any terminated or expired treaty or agreement under
which as of December 31, 1996 there remains an outstanding liability with
respect to paid or unpaid case reserves in excess of $500,000), any terminated
or expired treaty or agreement under which there remains any outstanding
liability from one reinsurer with respect to paid or unpaid case reserves in
excess of $100,000 and any treaty or agreement with any Affiliate of such
Subsidiary, the effective date of each such treaty or agreement, and the
termination date of any treaty or agreement which has a definite termination
date (individually a "Reinsurance Agreement" and collectively, the "Reinsurance
Agreements"), copies of which have been delivered or made available to Buyer.
Assuming the due authorization, execution and delivery of each such Reinsurance
Agreement by the other parties thereto, each such Reinsurance Agreement is valid
and binding in all material respects in accordance with its terms and is in full
force and effect.  None of the in-force Reinsurance Agreements may be terminated
by any party thereto due to a change of control of the Company or any of the
Subsidiaries.  No other party to any Reinsurance Agreement has given notice to
the Company or any of its Subsidiaries that it intends to terminate or cancel
any such Reinsurance Agreement as a result of the transactions contemplated
hereby or the contemplated operations of the Company or its Subsidiaries after
the consummation of the transactions contemplated hereby, which termination or
change would  reasonably be expected to have a Material Adverse Effect.  To the
knowledge of Seller, no Subsidiary is in default in any respect as to any
provision of any reinsurance or retrocession treaty or agreement or has failed
to meet the underwriting standards required for any business reinsurance
thereunder except for defaults, which would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect.

                                      -23-
<PAGE>
 
          Section 4.22  Environmental Laws.  (a)  To the knowledge of Seller,
                        ------------------                                   
except as set forth on Schedule 4.22 and as would not, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect: (i) the
Company and each of its Subsidiaries is in compliance with all applicable
Environmental Laws, and possesses and is in compliance with all Environmental
Permits required under such laws for the conduct of its business and operations,
(ii) there are no past, present or future events, conditions, circumstances,
practices, plans or legal requirements that would reasonably be expected to
prevent, or increase the burden on the Company or any of its Subsidiaries of
complying with applicable Environmental Laws or of their obtaining, renewing or
complying with all Environmental Permits required under such laws for the
conduct of its business and operations, (iii) there are and have been no
conditions at any property owned, operated or otherwise used by the Company or
any Subsidiary now or in the past, or at any other location, that would
reasonably be expected to give rise to liability of the Company or any of its
Subsidiaries under any Environmental Law, and (iv) since September 3, 1993,
there have been no past and there are now no pending or threatened Actions
regarding the Company or any of its Subsidiaries brought by any Person or
Governmental Authority regarding any Environmental Law or Hazardous Material.

          (b) Notwithstanding the representations contained in this Section,
Buyer acknowledges that Seller is not making any representations (express or
implied in or pursuant to this Agreement) with respect to any violation of or
noncompliance with Environmental Law or Environmental Permits, or failure to
obtain Environmental Permits, in each case by reason of any insurance,
reinsurance, indemnity, guaranty or assumption of liability policy of any party,
entered into by the Company or any Insurance Subsidiary.

          Section 4.23  Insurance Coverage.  The Company has furnished to Buyer
                        ------------------                                     
a true and correct list, as of the date hereof, of all policies of insurance
relating to the assets, properties, business, operations, employees, officers or
directors of the Company and each of its Subsidiaries.  The Company maintains
insurance relating to such assets, properties, business, operations, employees,
officers and directors which is reasonable for a company of its size engaged in
the property and casualty insurance business.

          Section 4.24  Labor Matters.  Since December 31, 1996, the operation
                        -------------                                         
of the business of the Company and its Subsidiaries has not been materially and
adversely affected by labor problems.  To the knowledge of Seller, (i) no such
problem would, individually or in the aggregate, reasonably be expected to have
a Material Adverse Effect and (ii) the activities of the Company and its
Subsidiaries have been in compliance in all material respects with all
Applicable Laws respecting employment and employment practices, terms and
conditions of employment and wages and hours.  Schedule 4.24 sets forth as of
the date hereof, to the knowledge of Seller, a description of all pending or
threatened disputes or claims applicable to the Company or any of its
Subsidiaries alleging employment discrimination, sexual harassment or any unfair
employment practice.

          Section 4.25  No Other Agreements to Sell the Assets or the Company.
                        -----------------------------------------------------  
Except as set forth on Schedule 4.25, none of Parent, Seller, the Company or any
Subsidiary has any agreement, absolute or contingent, with any other Person to
sell the capital stock, material assets (other than with respect to the sale of
portfolio assets in the ordinary course of business consistent with past
practice) or business of the Company or any Subsidiary or to effect any merger,
consolidation or other reorganization of the Company or any Subsidiary or to
enter into any agreement with respect thereto.

          Section 4.26  1992/93 Restructuring. The 1992/93 Restructuring
                        ---------------------                           
complied with, and all novations made pursuant to the 1992/93 Restructuring were
made in accordance with, all applicable statutes, rules, regulations, orders,
writs, injunctions, judgments and decrees, except for such failures to be 

                                      -24-
<PAGE>
 
in accordance therewith which would not, individually or in the aggregate,
reasonably be expected to have a Material Adverse Effect.  To the knowledge of
Seller, as of the date hereof, no party has raised any judicial, regulatory or
other formal challenge: (i) seeking to overturn the contracts and arrangements
entered into in connection with the 1992/93 Restructuring or (ii) seeking to
invalidate the novation process (not including challenges to the novation status
of individual policies in the context of insurance policy claims or litigation)
provided for under the Assumption and Indemnity Reinsurance Agreements entered
into as a part of the 1992/93 Restructuring.


                                   ARTICLE V

                    REPRESENTATIONS AND WARRANTIES OF BUYER

          Buyer hereby represents and warrants to Seller as follows:

          Section 5.1  Organization and Related Matters.  Buyer is a
                       --------------------------------             
corporation, duly organized, validly existing and in good standing under the
laws of the Cayman Islands.  The copies of the Memorandum of Association and the
Articles of Association, and any amendments thereto, of Buyer previously
delivered to the Company are complete and correct copies of such instruments as
in effect as of the date of this Agreement.

          Section 5.2  Authority; No Violation.  (a)  Buyer has full corporate
                       -----------------------                                
power and authority to execute and deliver this Agreement and the Ancillary
Agreements and to consummate the transactions contemplated hereby and thereby.
The execution and delivery of this Agreement and the Ancillary Agreements and
the consummation of the transactions contemplated hereby and thereby have been
duly and validly approved by all requisite corporate action on the part of
Buyer, and no other corporate proceedings on the part of Buyer are necessary to
approve this Agreement and the Ancillary Agreements or to consummate the
transactions contemplated hereby and thereby.  This Agreement and the Tax
Agreement have been duly and validly executed and delivered by Buyer and
(assuming the due authorization, execution and delivery of this Agreement and
the Tax Agreement by Seller and the other parties thereto) constitute valid and
binding obligations of Buyer, enforceable against Buyer in accordance with their
respective terms, except as enforcement may be limited by general principles of
equity, whether applied in a court of law or a court of equity, and by
bankruptcy, insolvency, moratorium and similar laws affecting creditors' rights
and remedies generally.

          (b) Neither the execution and delivery of this Agreement and the
Ancillary Agreements by Buyer, nor the consummation by Buyer of the transactions
contemplated hereby and thereby to be performed by it, nor compliance by Buyer
with any of the terms or provisions hereof or thereof, will (i) violate any
provision of the Memorandum of Association or the Articles of Association of
Buyer, or (ii) assuming that the consents and approvals referred to in Section
5.3 are duly obtained, (A) violate in any material respect any Applicable Law
with respect to Buyer, or any of its material properties or assets or (B)
violate, conflict with, result in a breach of any provision of, or constitute a
default (with or without notice or lapse of time, or both) under, or give rise
to a right of termination, cancellation or acceleration of any obligation or
loss of a material benefit under, or require the consent of any Person under, or
result in the imposition of any Encumbrance on any of the properties or assets
of Buyer under, any note, bond, mortgage, indenture, deed of trust, license,
lease, agreement or other instrument or obligation to which Buyer is a party, or
by which Buyer or any of its properties or assets may be bound or affected,
except for such violations, conflicts, breaches or defaults which, would not,
individually or in the aggregate, prevent or materially delay the performance by
Buyer of any of its obligations hereunder.

                                      -25-
<PAGE>
 
          Section 5.3  Consents and Approvals.  Except for (i) the approval of
                       ----------------------                                 
this Agreement, the Ancillary Agreements and the transactions contemplated
hereby and thereby, and the new intercompany tax agreements among the Company
and the Subsidiaries which shall be effective as of the Closing, by each of the
applicable governmental and regulatory authorities set forth on Schedule 5.3,
(ii) the approval of this Agreement, the Ancillary Agreements and the
transactions contemplated hereby and thereby, and the new intercompany tax
agreements among the Company and the Subsidiaries which shall be effective as of
the Closing, by any other governmental or regulatory authorities, the failure of
which to obtain would not, individually or in the aggregate, reasonably be
expected to have a Material Adverse Effect, (iii) the filing of premerger
notification reports under the HSR Act, (iv) the filing of a notice pursuant to
the Exon-Florio Amendment, and (iv) consents, approvals, authorizations,
declarations, filings and registrations required by the nature of the business
or ownership of Seller, no consent, approval or authorization of, or
declaration, filing or registration with, any governmental or regulatory
authority, or any other Person, is required to be made or obtained by Buyer on
or prior to the Closing Date in connection with the execution or delivery of
this Agreement or any of the Ancillary Agreements, the performance of this
Agreement or any Ancillary Agreement, or the consummation of the transactions
contemplated hereby and thereby.

          Section 5.4  Legal Proceedings.  As of the date hereof, Buyer is not a
                       -----------------                                        
party to any, and there are no pending or, to the knowledge of Buyer,
threatened, Actions against or otherwise affecting Buyer or its properties or
assets or challenging the validity or propriety of the transactions contemplated
by this Agreement which, if adversely determined, would, individually or in the
aggregate, prevent or materially delay the performance by Buyer of any of its
obligations pursuant to this Agreement, and there is no injunction, order,
judgment, decree or regulatory restriction imposed upon Buyer or its properties
or assets which would, individually or in the aggregate, prevent or materially
delay the performance by Buyer of any of its obligations pursuant to this
Agreement.

          Section 5.5  Investment Intent of Buyer.  The Shares to be acquired
                       --------------------------                            
under this Agreement will be acquired by Buyer for its own account and not for
the purpose of a distribution.  Buyer will refrain from transferring or
otherwise disposing of any of the Shares acquired by it, or any interest
therein, in such manner as to violate any registration provision of the
Securities Act of 1933, as amended, or any applicable state securities law
regulating the disposition thereof.

          Section 5.6  Investment Company.  Buyer is not an investment company
                       ------------------                                     
subject to registration and regulation under the Investment Company Act of 1940,
as amended.

          Section 5.7  No Other Broker.  Other than Donaldson, Lufkin & Jenrette
                       ---------------                                          
Securities Corporation, the fees and expenses of which will be paid by Buyer, no
broker, finder or similar intermediary has acted for or on behalf of Buyer or
any Affiliate of Buyer, or is entitled to any broker's, finder's or similar fee
or other commission from Buyer, or any Affiliate of Buyer, in connection with
this Agreement or the transactions contemplated hereby.

          Section 5.8  Financing.  Buyer has, and at the Closing will have,
                       ---------                                           
sufficient cash to consummate the transactions contemplated hereby and to pay
all related fees and expenses.


                                    ARTICLE VI


                                   COVENANTS

          Section 6.1  Conduct of Business.  During the period from the date of
                       -------------------                                     
this Agreement through the Closing Date, except as contemplated or permitted by
this Agreement or with the consent of 

                                      -26-
<PAGE>
 
Buyer, the Company shall (and shall cause its Subsidiaries to) (a) carry on its
business in the ordinary course consistent with past practice, (b) use
reasonable best efforts to (i) preserve its present business organization and
relationships and those of its Subsidiaries, (ii) keep available the present
services of its employees, and (iii) preserve the rights, franchises, goodwill
and relations of its customers and others with whom business relationships
exist, (c) not pay or agree to pay in settlement or compromise of any suits or
claims of liability against the Company, its directors, officers, employees or
agents, more than an aggregate of $250,000 for all such suits and claims, (d)
not make any prepayment of any liabilities, individually or in the aggregate,
exceeding $250,000, and (e) not enter into any agreement described in Section
4.15(b). Without limiting the generality of the foregoing, except as
contemplated or permitted by this Agreement or consented to by Buyer, Seller
shall not take any of the actions referred to in paragraphs (a) through (u)
(excluding paragraph (s)) of Section 4.11 between the date of this Agreement and
the Closing Date.

          Section 6.2  Confidentiality and Announcements.  (a)  Except as
                       ---------------------------------                 
provided in Section 6.2(b), neither Seller or Buyer, nor any of their respective
Affiliates, shall publicly disclose the execution, delivery or contents of this
Agreement, other than with the prior written consent of the other party hereto,
or other than as required by any Applicable Law or the rules of any stock
exchange upon prior notice to the other party hereto.

          (b) Buyer and Seller shall agree with each other as to the form and
substance of any press release related to this Agreement or the transactions
contemplated hereby, and shall consult each other as to the form and substance
of other public disclosures related thereto, provided, however, that nothing
contained herein shall prohibit either party, following notification to the
other party if practicable, from making any disclosure which its counsel
determines to be required by any Applicable Law or the rules of any stock
exchange.

          Section 6.3  Expenses.  Regardless of whether any or all of the
                       --------                                          
transactions contemplated by this Agreement are consummated, and except as
otherwise expressly provided herein, Buyer and Seller shall each bear their
respective direct and indirect expenses incurred in connection with the
negotiation and preparation of this Agreement and the consummation of the
transactions contemplated hereby.

          Section 6.4  Access; Certain Communications.   Between the date of
                       ------------------------------                       
this Agreement and the Closing Date, subject to Applicable Laws relating to the
exchange of information, Seller shall (and shall cause the Company and its
Subsidiaries to) afford to Buyer and its authorized agents and representatives
complete access, upon reasonable notice and during normal business hours, to all
contracts, documents and information of or relating to the assets, liabilities,
business, operations and other aspects of the business of the Company and its
Subsidiaries and, during such period, Seller shall (and shall cause the Company
and each of its Subsidiaries to) furnish promptly to Buyer, (a) all
correspondence or written communication between the Company or any of its
Subsidiaries and A.M. Best, Standard & Poor's Corporation, Moody's Investor
Services, Inc., any Governmental Authority or any Insurance Regulator which
relates to the transactions contemplated hereby or which is otherwise material
to the financial condition or operation of the Company and its Subsidiaries
taken as a whole, and (b) subject to any attorney-client privilege applicable to
the Company or its Subsidiaries, all other information concerning its business,
properties and personnel as Buyer may reasonably request.  Seller shall cause
the Company Employees (subject to any attorney-client privilege applicable to
the Company or its Subsidiaries) to provide reasonable assistance to Buyer in
Buyer's investigation of matters relating to the purchase of the Shares,
provided, however, that Buyer's investigation shall be conducted in a manner
which does not interfere with the Company's or its Subsidiaries' normal
operations, customers and employee relations. Without limiting any of the terms
thereof, the terms of the Confidentiality Agreement shall govern Buyer's and its
agents' and representatives' obligations with respect to all confidential
information with respect to 

                                      -27-
<PAGE>
 
the Company or its Subsidiaries which has been provided or made available to
them at any time, including during the period between the date of this Agreement
and the Closing Date.

          Section 6.5  Regulatory Matters; Third Party Consents.  (a)  Buyer and
                       ----------------------------------------                 
Seller shall cooperate with each other and use reasonable best efforts promptly
to prepare and file all necessary documentation, to effect all applications,
notices, petitions and filings, and to obtain as promptly as practicable all
permits, consents, approvals, waivers and authorizations of all third parties
and Governmental Authorities which are necessary or advisable to consummate the
transactions contemplated by this Agreement.  Buyer and Seller shall have the
right to review in advance, and shall consult with the other on, in each case
subject to Applicable Laws relating to the exchange of information, all the
information relating to Seller, the Company and the Subsidiaries or Buyer, as
the case may be, and any of their respective Affiliates, which appear in any
filing made with, or written materials submitted to, any third party or any
Governmental Authority in connection with the transactions contemplated by this
Agreement, provided, however, that nothing contained herein shall be deemed to
provide either party with a right to review any information provided to any
Governmental Authority on a confidential basis in connection with the
transactions contemplated hereby.  The parties hereto agree that they will
consult with each other with respect to the obtaining of all permits, consents,
approvals and authorizations of all third parties and Governmental Authorities
necessary or advisable to consummate the transactions contemplated by this
Agreement and each party shall keep the other apprised of the status of matters
relating to completion of the transactions contemplated herein.  The party
responsible for any such filing shall promptly deliver to the other party
evidence of the filing of all applications, filings, registrations and
notifications relating thereto (except for any confidential portions thereof),
and any supplement, amendment or item of additional information in connection
therewith (except for any confidential portions thereof).  The party responsible
for a filing shall also promptly deliver to the other party a copy of each
material notice, order, opinion and other item of correspondence received by
such filing party from any Governmental Authority in respect of any such
application (except for any confidential portions thereof).  In exercising the
foregoing rights and obligations, Buyer and Seller shall act reasonably and as
promptly as practicable.

          (b) Without limiting the generality of the foregoing, within 20
Business Days after the date hereof, Buyer shall make Form A filings with the
insurance departments of the States of New York, California (if required),
Georgia and Texas with respect to the transactions contemplated hereby. Buyer
shall promptly make any and all other filings and submissions of information
with such insurance departments which are required or requested by such
insurance departments in order to obtain the approvals required by such
insurance departments to consummate the transactions contemplated hereby. Seller
agrees to furnish Buyer with such necessary information and reasonable
assistance as Buyer may reasonably request in connection with its preparation of
such Form A filings and other filings or submissions.  Buyer shall keep Seller
fully apprised of its actions with respect to all such filings and submissions
and shall provide Seller with copies of such Form A filings and other filings or
submissions.

          (c) Buyer and Seller shall, upon request, furnish each other with all
information concerning themselves, their subsidiaries, directors, officers and
stockholders and such other matters as may be reasonably necessary in connection
with any statement, filing, notice or application made by or on behalf of Buyer,
the Company or any of their respective Affiliates to any Governmental Authority
in connection with the transactions contemplated by this Agreement (except to
the extent that such information would be, or relates to information that would
be, filed under a claim of confidentiality).

          (d) Buyer and Seller shall promptly advise each other upon receiving
any communication from any Governmental Authority whose consent or approval is
required for consummation of the transactions contemplated by this Agreement
which causes such party to believe that 

                                      -28-
<PAGE>
 
there is a reasonable likelihood that any requisite regulatory approval will not
be obtained or that the receipt of any such approval will be materially delayed.

          (e) Seller shall use commercially reasonable efforts to obtain, with
respect to each Insurance Subsidiary, copies of certificates of admission or
authority from the insurance commissioner or similar authority of each state in
which such Insurance Subsidiary is admitted or authorized to conduct business.

          Section 6.6  Further Assurances.  Each of the parties hereto shall
                       ------------------                                   
execute such documents and other papers and perform such further acts as may be
reasonably required to carry out the provisions hereof and the transactions
contemplated hereby.  Each such party shall, on or prior to the Closing Date,
use reasonable best efforts to fulfill or obtain the fulfillment of the
conditions precedent to the consummation of the transactions contemplated
hereby, including the execution and delivery of any documents, certificates,
instruments or other papers that are reasonably required for the consummation of
the transactions contemplated hereby.

          Section 6.7  Notification of Certain Matters.  (a)  Each party shall
                       -------------------------------                        
give prompt notice to the other party of (i) the occurrence, or failure to
occur, of any event or existence of any condition that has caused or would
reasonably be expected to cause any of its representations or warranties
contained in this Agreement to be untrue or inaccurate in any material respect
at any time after the date of this Agreement, up to and including the Closing
Date (except to the extent such representations and warranties speak as of a
particular date), and (ii) any failure on its part to comply with or satisfy, in
any material respect, any covenant, condition or agreement to be complied with
or satisfied by it under this Agreement.

          (b) Seller may, prior to the Closing, by written notice to Buyer,
supplement any Schedule to reflect any change or event that occurs after the
date of this Agreement or to otherwise correct or amend any such Schedule,
provided that all such supplemental Schedules shall be delivered to Buyer by
Seller at the same time on a Business Day not fewer than three Business Days
prior to the Closing.

          (c) Such supplemental Schedules shall be deemed to cure any breach of
any of Seller's representations or warranties for purposes of Section 7.1(a)
unless the impact of all matters disclosed on such supplemental Schedules would,
individually or in the aggregate, reasonably be expected to have a Material
Adverse Effect.  Except as set forth in Section 6.7(d), such supplemental
Schedules shall not be deemed to have cured any breach of any of Seller's
representations or warranties for purposes of Article VIII hereof.

          (d) Such supplemental Schedules shall be deemed to cure any breach of
any of Seller's representations or warranties for purposes of Article VIII
hereof if the impact of all matters disclosed on such supplemental Schedules is
reasonably expected to have a Material Adverse Effect and Buyer exercises its
right to proceed with the Closing.

          (e) The delivery by Seller to Buyer of such supplemental Schedules
shall be accompanied by a written statement that, in Seller's opinion, the
impact of all matters disclosed on such supplemental Schedules either would or
would not, individually or in the aggregate, reasonably be expected to have a
Material Adverse Effect.  If Seller's written opinion is that such impact would
reasonably be expected to have a Material Adverse Effect, Buyer shall be deemed
to have agreed with such opinion.  If Seller's written opinion is that such
impact would not reasonably be expected to have a Material Adverse Effect, Buyer
may dispute such opinion, provided that Buyer shall deliver to Seller, at least
one Business Day prior to the Closing, a written statement that, in Buyer's
opinion, the impact of all 

                                      -29-
<PAGE>
 
matters disclosed on such supplemental Schedules would, individually or in the
aggregate, reasonably be expected to have a Material Adverse Effect.

          Section 6.8  Maintenance of Records.  Through the Closing Date the
                       ----------------------                               
Company shall maintain the Records in all material respects in the same manner
and with the same care that the Records have been maintained prior to the
execution of this Agreement.  From and after the Closing Date, each of the
parties shall permit the other party reasonable access to any applicable Records
in its possession, and the right to duplicate such Records, to the extent that
the requesting party has a reasonable business purpose for requesting such
access or duplication.  Each party hereto shall notify the other party of any
extension of any applicable statute of limitations related to such Records and
Buyer shall obtain the consent of Seller before destroying any of the Records
retained pursuant to this Section.  Notwithstanding any other provision of this
Section, access to any Records may be denied to the requesting party if the
other party is required under Applicable Law to deny such access.

          Section 6.9  Employees and Employee Plans.  (a)  (i)  Except as
                       ----------------------------                      
provided otherwise in Section 4.13(i), no provision of this Agreement shall be
construed to prohibit the Company or its Subsidiaries from having the right to
terminate the employment of any Company Employee, with or without cause, or to
amend or to terminate after the Closing any employee benefit plan established,
maintained or contributed to by the Company or its Subsidiaries.

          (ii)   Service by the Company Employees with the Company, Seller or
any of their Affiliates shall be recognized under each benefit plan, program or
arrangement established, maintained or contributed to for the benefit of any
Company Employee by Buyer, the Company or any of their Affiliates after the
Closing for purposes of eligibility to participate and vesting, but in no event
shall this Agreement require that such service prior to the Closing Date be
taken into account in determining the accrual of benefits under any such benefit
plan or arrangement, including, without limitation, a defined benefit plan.
Seller shall provide Buyer prior to the Closing with evidence of full vesting of
Company Employees under the Retirement Plan, the SERP and the IRP, and Buyer and
Seller each acknowledge that the IRP vesting rules also govern participating
Company Employees' vesting under the SIRP.

          (iii)  The parties acknowledge that any former employees included
within the definition of Company Employees shall have, after the Closing, such
re-employment rights, if any, as may be available to them under Applicable Law
with respect to the Company and its Subsidiaries and not with respect to Seller
or any of its other Affiliates.

          (iv)   Buyer shall, or shall cause the Company to, (A) notify Seller
if the employment of any Company Employee, who also is a "Covered Employee"
under the Talegen Holdings, Inc. Retention Incentive Plan, terminates within the
12-month period beginning on the Closing Date and (B) provide to Seller such
information as Seller may reasonably request to enable Seller to determine such
Company Employee's eligibility for a retention benefit under such Plan. Seller
hereby acknowledges and agrees that it shall remain solely liable for, and
either retain all liability for (or reimburse the Company with respect to) all
obligations arising under and benefits payable from, the Talegen Holdings, Inc.
Retention Incentive Plan.  Buyer shall not be responsible for any obligations
arising thereunder and shall not be liable for any payments required to be made
thereunder.  Buyer hereby acknowledges and agrees that the Company will remain,
after the Closing Date, subject to the obligations imposed on the "Company"
under the Enhanced Severance Benefit Plan of Westchester Fire Insurance Company.

          (b)    Prior to the Closing Date, Seller shall take whatever corporate
action is necessary to ensure that the Company and its Subsidiaries shall cease
being "participating employers" and shall cease co-sponsorship of any welfare
plans (as defined in Section 3(1) of ERISA) jointly adopted, sponsored or

                                      -30-
<PAGE>
 
maintained by Seller and the Company or the Subsidiaries as of the Closing Date;
provided, however, that at the option of Buyer, Buyer may elect, by written
notice to Seller, given no less than 30 days prior to the Closing Date, to
continue coverage of Company Employees under the Talegen Holdings, Inc. Medical
and Dental Plans for the period commencing on the Closing Date and ending on
December 31, 1997 or such earlier date as specified by Buyer, by written notice
to Seller, given no less than 30 days prior to such earlier ending date.  If
Buyer makes such election, Buyer shall reimburse Seller on a monthly basis,
within 10 Business Days of notification by Seller of the amount of such costs,
for the monthly costs (including its pro rata share of administrative expenses
and "stop-loss" premiums) incurred in providing such coverage.  Such costs of
coverage shall be determined by Seller in accordance with substantially the same
methods and procedures under which such costs of coverage were determined by
Seller immediately prior to the Closing Date.   Subject to Section 6.9(a)(i),
the Company shall retain responsibility for providing medical benefits to all
Company Employees, including Company Employees who are receiving, or who are
eligible to receive (as described in paragraph (a) of the "Company Employee"
definition), benefits under the Disability Plans.

          (c)   Seller retains all current, contingent and potential liability
with respect to the Retirement Plan and SERP, and the Retirement Plan shall
retain liability for all benefits accrued through the Closing Date with respect
to the Company Employees.  Effective as of the Closing Date, all Company
Employees shall be deemed, for all purposes in applying the Retirement Plan, to
have terminated their service on that date.

          (d)   As soon as practicable following the Closing Date, Seller shall
take whatever action is necessary (i) to permit Company Employees to elect a
distribution of their benefits from the IRP in accordance with the IRP and
Applicable Law, and (ii) in accordance with Seller's current practice and
Applicable Law, to permit Company Employees who do not elect a distribution of
their benefits from the IRP to continue to repay (by check) any outstanding loan
balances existing under the IRP as of the Closing Date.  As soon as practicable
following the Closing Date, Seller shall take whatever action is necessary to
cause Company and its Subsidiaries (i) to cease being "participating companies"
and co-sponsors of the SIRP, (ii) to transfer to the Company any assets
associated with the liabilities of the Company and its Subsidiaries that are not
held by the Company as of the Closing Date, and (iii) to enable the Company and
its Subsidiaries to effect the distribution of Company Employees' benefits under
the SIRP in accordance with the SIRP and Applicable Law.

          (e)   (i)  The Company shall, or shall cause its Subsidiaries to,
retain in place and be responsible for all payments required under the Enhanced
Severance Plan of Westchester Fire Insurance Company. Seller shall have no
liability for any payments made or owing under such Plan with respect to
terminations of employment which occur subsequent to the Closing Date.

          (ii)  Subject to Section 6.9(a)(iv), the Company or one of its
Subsidiaries shall make all payments required to be made to any current or
former Company or Subsidiary employee under the Retention Incentive Plan of
Talegen Holdings, Inc.  Seller shall promptly reimburse, on an after-tax basis
(determined at 75% of the maximum applicable federal corporate income tax rate),
the Company and its Subsidiaries, as appropriate, for any such payments. If it
is later determined that any payment made pursuant to this Section 6.9(e)(ii) is
non deductible by the Company under Section 280G of the Code, then Seller shall
pay to the Company an amount equal to the excess of such payment made by the
Company over the amount previously reimbursed by Seller under this Section
6.9(e)(ii).

          (f)   Buyer and Seller agree to cooperate to carry out the duties and
responsibilities set forth in this Section 6.9.  In addition, Seller agrees to
make available to Buyer such information as Buyer may reasonably request to
carry out the provisions of this Section 6.9.

                                      -31-
<PAGE>
 
          Section 6.10  Pre-Closing Dividends.  Between the date hereof and the
                        ---------------------                                  
Closing, the Company shall not pay dividends to Seller other than as is
expressly contemplated by this Agreement or an Ancillary Agreement.

          Section 6.11  Crostex/Camfex.  (a)  On or prior to the Closing Date,
                        --------------                                        
subject to obtaining any necessary consents from Crostex Associates Limited
Partnership, Camfex Associates Limited Partnership or other third parties
(including applicable Governmental Authorities), Seller shall cause the
following to occur with respect to the Crostex/Camfex Leases:

          (i)   Seller shall cause Westchester Fire to transfer its interest in
     the Dallas Lease to one of the CFI Entities, and shall cause such CFI
     Entity to assume such interest in the Dallas Lease and indemnify
     Westchester Fire for all liabilities and other Loss thereunder; and

          (ii)  Seller shall cause Westchester Fire to transfer its interest in
     the Pleasanton Lease to Talegen Properties, Inc., a subsidiary of Seller,
     and shall cause Talegen Properties, Inc. to assume such interest in the
     Pleasanton Lease and indemnify Westchester Fire for all liabilities and
     other Loss thereunder.

          (b)   On or prior to the Closing Date, subject to obtaining any
necessary consents from Crostex Associates Limited Partnership, Camfex
Associates Limited Partnership or other third parties (including applicable
Governmental Authorities), Seller shall cause the following to occur with
respect to the Crostex/Camfex Purchase Money Documents:

          (i)   Seller shall cause Westchester Fire to transfer its interests in
     the 305 Purchase Money Documents and the Dallas Purchase Money Documents to
     one of the CFI Entities, for consideration equal to the respective
     statutory carrying values of Westchester Fire's percentage interests in the
     two promissory notes each entitled "Note Due December 1, 2009" that are
     part of the 305 Purchase Money Documents and the Dallas Purchase Money
     Documents, respectively; and

          (ii)  Seller shall cause Westchester Fire to transfer its interests in
     the 299 Purchase Money Documents and the Pleasanton Purchase Money
     Documents to Talegen Properties, Inc. or another designee of Seller, for
     consideration equal to the respective statutory carrying values of
     Westchester Fire's percentage interests in the two promissory notes each
     entitled "Note Due December 1, 2009" that are part of the 299 Purchase
     Money Documents and the Pleasanton Purchase Money Documents, respectively.

           Section 6.12  Exclusivity.  During the period from the date of this
                         -----------                                          
Agreement through the Closing Date:

          (a)   Parent, Seller and the Company shall cease any discussions or
     negotiations with any third party regarding (i) any merger, sale of assets
     not in the ordinary course of business, acquisition, business combination,
     change of control or other similar transaction involving the Company or any
     Subsidiary or any division of the Company or any Subsidiary, (ii) any
     purchase or other acquisition by any Person of Shares, or (iii) any sale or
     issuance by the Company or any Subsidiary of any shares of its capital
     stock;

          (b)   Neither Parent, Seller, the Company nor any Subsidiary shall,
     nor shall any of them authorize or permit any of their respective
     directors, officers, employees, representatives, agents or Affiliates to,
     directly or indirectly, solicit, initiate, encourage, respond favorably to,

                                      -32-
<PAGE>
 
     permit or condone inquiries or proposals from, or provide any confidential
     information to, or participate in any discussions or negotiations with, any
     Person (other than Buyer and its directors, officers, employees,
     representatives and agents) concerning (i) any merger, sale of assets not
     in the ordinary course of business, acquisition, business combination,
     change of control or other similar transaction involving the Company or any
     Subsidiary or any division of the Company or any Subsidiary, (ii) any
     purchase or other acquisition by any Person of Shares, or (iii) any sale or
     issuance by the Company or any Subsidiary of any shares of its capital
     stock;

          (c)   Seller will promptly advise Buyer of, and communicate to Buyer
     the terms and conditions of (and the identity of the Person making), any
     such inquiry or proposal received; and

          (d)   Seller shall use commercially reasonable efforts to enforce the
     terms of any confidentiality or standstill agreements with third parties
     relating to the Company or any of its Subsidiaries or any of their
     respective businesses, assets or employees and to require any such party to
     return any confidential information regarding the Company and its
     Subsidiaries and their respective businesses which they may have obtained
     pursuant to any such agreement.  All of Seller's rights in and to such
     confidentiality and standstill agreements shall be assigned to Buyer upon
     the occurrence of the Closing.

          Section 6.13  Additional Financial Statements.  During the period from
                        -------------------------------                         
the date of this Agreement through the Closing Date, as soon as is reasonably
practicable after the end of the applicable financial period, Seller shall
furnish to Buyer (a) each annual convention statement filed by the Insurance
Subsidiaries during such period pursuant to the requirements of any Applicable
Law, (b) the quarterly convention statements of the Insurance Subsidiaries for
each interim quarterly period subsequent to June 30, 1997, which shall have been
prepared on an accounting basis consistent with the Convention Statements,
subject to normal year-end adjustments, and, with respect to the financial
statements included therein, in conformity with the statutory accounting
practices prescribed or permitted by the respective state of domicile for each
Insurance Subsidiary, (c) the quarterly financial statements of the Company and
Ridge Re for all quarterly periods subsequent to June 30, 1997, which shall have
been prepared on a basis consistent with the Company GAAP Financial Statements
and the Ridge Re GAAP Financial Statements, as the case may be, subject to
normal year-end adjustments and the absence of footnote disclosure, (d) the
consolidated financial statements for the Company and Ridge Re for the year
ended December 31, 1997, which shall have been prepared in accordance with GAAP
and on a basis consistent with the Company GAAP Financial Statements and the
Ridge Re GAAP Financial Statements, as the case may be, and (e) (to the extent
ordinarily prepared) all monthly financial statements of the Company, the
Subsidiaries and Ridge Re (for months subsequent to June 1997), which shall have
been prepared in a manner consistent with past practice.

          Section 6.14  Intercompany Accounts.  (a)  All intercompany accounts
                        ---------------------                                 
(other than those relating to Taxes and those under or relating to reinsurance
contracts and arrangements) between the Company and any Subsidiary, on the one
hand, and Parent and any of its Affiliates (other than the Company and its
Subsidiaries), on the other hand, as of the Closing shall be settled in
accordance with the financial terms of such intercompany accounts (but
irrespective of the terms of payment of such intercompany accounts) in the
manner provided in this Section. At least five business days prior to the
Closing, Seller shall prepare and deliver to Buyer a statement setting out in
reasonable detail the calculation of all such intercompany account balances
based upon the latest available financial information as of such date and, to
the extent reasonably requested by Buyer, provide Buyer with supporting
documentation to verify the underlying intercompany charges and transactions.
All such intercompany account balances shall be paid in full in cash prior to
the Closing. All intercompany accounts relating to Taxes will be governed by the
Tax Agreement.

                                      -33-
<PAGE>
 
          (b)   As promptly as practicable, but no later than 60 days after the
Closing Date, Seller shall cause to be prepared and delivered to Buyer a
statement setting out in reasonable detail the calculation of such intercompany
account balances as of the Closing Date (giving effect to any settlement under
Section 6.14(a) and any other payments).  Buyer and Seller shall cooperate in
the preparation of any such calculation including the provision of supporting
documentation to verify the underlying intercompany charges, transactions and
payments.  If Buyer disagrees with Seller's calculation of such intercompany
balances Buyer may, within 30 days after delivery of such statement, deliver a
notice to Seller disagreeing with such calculation and setting forth Buyer's
calculation of such amount.  If Buyer and Seller are unable to resolve such
disagreement within 30 days thereafter, such disagreement shall be resolved by
independent accountants of nationally recognized standing reasonably
satisfactory to Buyer and Seller.  The net amount of any such intercompany
balance shall be paid in cash promptly thereafter, together with interest
thereon from and including the Closing Date to but excluding the date of payment
at a rate equal to 5% per annum.  Such interest shall be payable at the same
time as the payable to which it relates and shall be calculated daily on the
basis of a year of 365 days and the actual number of days elapsed.

          Section 6.15  Rating Agency Presentations.  Buyer shall give Seller
                        ---------------------------                          
reasonable notice of any meetings prior to the Closing Date with any rating
agency (including without limitation A.M. Best and Standard & Poor's
Corporation) to discuss the ratings (including insurance claims paying ratings)
of the Insurance Subsidiaries, and Seller at its option may have a
representative at such meetings.  Seller shall give Buyer reasonable notice of
any meetings prior to the Closing Date with any rating agency (including without
limitation A.M. Best and Standard & Poor's Corporation) to discuss the ratings
(including insurance claims paying ratings) of the Insurance Subsidiaries, and
Buyer at its option may have a representative at such meetings.

          Section 6.16  Investment Portfolio.  Five days prior to the Closing
                        --------------------                                 
Date, Seller shall cause the Company to deliver to Buyer a list of all
investments in the investment portfolio for the Company and the Subsidiaries as
of such date.

          Section 6.17  Reinsurance Agreements.  (a)  Except in the ordinary
                        ----------------------                              
course of business consistent with past practice and except for the Berkshire
Hathaway Reinsurance Agreement, without the prior written approval of Buyer
(which approval shall not be unreasonably withheld), Seller shall cause the
Company and each Subsidiary not to (i) amend any reinsurance or retrocession
agreement (except for the Ridge Re Amendment), (ii) enter into or commit to
enter into any loss portfolio transfer or other similar transaction, agreement
or arrangement or series of related transactions, agreements or arrangements
involving any ceded reinsurance of the Company or any Subsidiary, (iii) enter
into or commit to enter into any reinsurance or retrocession contract or treaty
except to replace, renew or extend existing reinsurance and retrocession
agreements and treaties on terms which are not different in any material respect
from the terms of the agreement or treaty being replaced, renewed or extended,
as the case may be, or (iv) commute or terminate any contract of reinsurance.

          (b)   [Not used.]

          (c)   Seller shall use reasonable best efforts to cause, at or
immediately prior to the Closing, the transfer of $69,000,000 from Westchester
Fire to the Company, and from the Company to Seller, as a return of capital, in
either case as a return of capital, dividend, repurchase or redemption of its
capital stock.

                                      -34-
<PAGE>
 
          (d)  If the amount transferred to the Company by Westchester Fire, and
to Seller by the Company, pursuant to Section 6.17(c) is less than $69,000,000,
Buyer shall pay to Seller as an adjustment to the Purchase Price at the Closing
the amount of such deficiency.

          (e)  [Not used.]

          (f)  Seller shall not have any obligation to pay more than (i)
$60,000,000 ($500,000 of which has been paid prior to the date of this
Agreement), plus (ii) the amount transferred to the Company by Westchester Fire,
and to Seller by the Company, pursuant to Section 6.17(c), as consideration for
the reinsurance contemplated by the Berkshire Hathaway Reinsurance Agreement
unless Buyer pays to Seller an amount pursuant to Section 6.17(d), in which case
Seller shall also be obligated to pay as consideration for such reinsurance an
additional amount equal to such amount paid by Buyer to Seller pursuant to
Section 6.17(d).
 
          (g)  Seller shall pay or cause to be paid the balance of the
consideration for the reinsurance contemplated by the Berkshire Hathaway
Reinsurance Agreement.

          (h)  Nothing in this Section 6.17 shall limit or impair in any manner
any of the rights of the parties under any other Section of this Agreement or
any of its Schedules or Exhibits.

          Section 6.18  Person Authorized to Act Prior to the Closing.  Seller
                        ---------------------------------------------         
shall deliver (a) a true and complete list of the names and locations of all
banks, trust companies, securities brokers, and other financial institutions at
which each of the Company and each of its Subsidiaries have an account or safe
deposit box or maintain a banking, custodial, trading, or other similar
relationship, (b) a true and complete list and description of each such account,
box, and relationship, indicating in each case the account number and the names
of the respective officers, employees, agents, or other similar representatives
of the Company and its Subsidiaries transacting business with respect thereto,
(c) a true and complete list of each Person authorized to draw on each such
account, entitled to have access thereto or authorized to borrow money (or
furnish security for the same) therefrom, and (d) a true and complete list of
each power of attorney granted to any Person or Persons for any purpose.

          Section 6.19  Tax Sharing Agreement Releases.  At or prior to the
                        ------------------------------                     
Closing, Seller shall cause the Company and each of its Subsidiaries to execute
and deliver to Seller, and Seller shall execute and deliver to the Company and
each of its Subsidiaries, releases with respect to any prior tax sharing
agreements in the form attached hereto as Exhibit D.


                                 ARTICLE VII

                             CONDITIONS TO CLOSING

          Section 7.1  Conditions to Buyer's Obligations.  In addition to the
                       ---------------------------------                     
conditions set forth in Section 7.3, the obligations of Buyer to effect the
Closing shall be subject to the following conditions, any one or more of which
may be waived in writing by Buyer:

          (a)  The representations and warranties of Seller set forth in this
     Agreement shall be true and correct in all material respects (except that
     representations and warranties qualified by materiality or Material Adverse
     Effect shall be true and correct in all respects) as of the date of this
     Agreement and (except to the extent such representations and warranties
     speak as of an earlier date, in which case such representations and
     warranties shall be true and correct, or true and 

                                      -35-
<PAGE>
 
     correct in all material respects, as applicable, as of such earlier date)
     as of the Closing Date as though made on and as of the Closing Date;

          (b)  Seller shall have performed and complied in all material respects
     with all agreements, covenants, obligations and conditions required by this
     Agreement to be performed or complied with by Seller on or prior to the
     Closing Date;

          (c)  Seller shall have caused to be delivered to Buyer one or more
     certificates representing all of the Shares, free and clear of all
     Encumbrances, duly executed in blank or accompanied by stock powers duly
     executed in blank, in proper form for transfer, with all appropriate stock
     transfer tax stamps affixed, and shall have paid one half of all other
     transfer taxes required to be paid by any United States federal, state or
     local Governmental Authority in connection with the sale and delivery to
     Buyer of the Shares;

          (d)  Seller shall have caused to be delivered to Buyer a receipt
     evidencing payment by Buyer of the Purchase Price;

          (e)  Seller shall have caused to be delivered to Buyer the Guarantee,
     duly executed on behalf of Parent;

          (f)  Seller shall have caused to be delivered to Buyer the Records of
     the Company and its Subsidiaries to the extent not located at offices of
     the Company or its Subsidiaries (unless such Records have been previously
     delivered to such offices prior to the Closing);

          (g)  Seller shall have caused to be delivered to Buyer certificates as
     to the good standing of the Company and its Subsidiaries in the respective
     jurisdictions of their incorporation or domicile, dated as of a date not
     earlier than 10 days prior to the Closing Date, together with copies of the
     Certificates of Incorporation of the Company and its Subsidiaries certified
     by the applicable Secretary of State or other appropriate authority;

          (h)  Seller shall have caused to be delivered to Buyer resolutions of
     the board of directors of Seller, certified by the Secretary or Assistant
     Secretary of Seller, approving and authorizing the execution, delivery and
     performance of this Agreement and the Ancillary Agreements and the
     consummation of the transactions contemplated hereby and thereby, and the
     By-laws of the Company and each of its Subsidiaries, certified by the
     respective Secretary or Assistant Secretary of the Company and each of its
     Subsidiaries as of the Closing Date;

          (i)  On or prior to the Closing Date, the General Services Agreements
     between Seller and each of the Insurance Subsidiaries, each dated January
     1, 1993, as amended, shall have been terminated;

          (j)  Seller shall cause to be delivered to Buyer those certificates of
     admission or authority from the insurance commissioner or similar authority
     of each state in which an Insurance Subsidiary is admitted or authorized to
     conduct business which were obtained by Seller in accordance with Section
     6.5(e);

          (k)  Seller shall cause to be delivered to Buyer the resignations of
     (i) each person who is a director of the Company, and (ii) each person who
     is a director and/or an officer of the Company and/or any of the
     Subsidiaries if such person's principal employment is as an officer or an
     employee of Seller and/or Parent;

                                      -36-
<PAGE>
 
          (l)  Buyer shall have received written evidence reasonably
     satisfactory to Buyer that all consents and approvals required for the
     consummation of the transactions contemplated hereby or the ownership and
     operation by Buyer of the Company, the Subsidiaries and their respective
     businesses have been obtained, and all required filings have been made,
     including (without limitation) those set forth on Schedule 4.4;

          (m)  Seller shall have delivered to Buyer an opinion of LeBoeuf, Lamb,
     Greene & MacRae, L.L.P., substantially in the form attached hereto as
     Exhibit E;

          (n)  Buyer shall have entered into an amendment to the Claims Services
     Agreement with Envision Claims Management Corporation which provides for
     substantially the same terms as are currently in effect, with a minimum
     term of one year after the Closing Date on a cost-plus-15% pricing basis,
     and which provides only to Buyer the right to terminate such agreement at
     no cost upon 30 days notice;

          (o)  A financial report of KPMG Peat Marwick LLP with respect to the
     Company Interim Financial Statements pursuant to the requirements of SAS
     No. 71, Interim Financial Information (AICPA, Professional Standards);

          (p)  Buyer shall have received from Seller, the Company and each of
     its Subsidiaries releases with respect to any prior tax sharing agreements
     in the form attached hereto as Exhibit D; and

          (q)  Seller shall have caused to be delivered to Buyer a certificate
     executed by a duly authorized officer of Seller certifying that the
     conditions set forth in this Section 7.1 have all been satisfied.

          Section 7.2  Conditions to Seller's Obligations.  In addition to the
                       ----------------------------------                     
conditions set forth in Section 7.3, the obligations of Seller to effect the
Closing shall be subject to the following conditions, any one or more of which
may be waived in writing by Seller:

          (a)  The representations and warranties of Buyer contained in this
     Agreement shall be true in all material respects (except representations
     and warranties qualified by materiality shall be true and correct in all
     respects) as of the date of this Agreement and (except to the extent such
     representations and warranties speak as of an earlier date, in which case
     such representations and warranties shall be true and correct, or true and
     correct in all material respects, as applicable, as of such earlier date)
     on the Closing Date as though made on and as of the Closing Date;

          (b)  Buyer shall have performed and complied in all material respects
     with all agreements, covenants, obligations and conditions required by this
     Agreement to be performed or complied with by Buyer on or prior to the
     Closing Date;

          (c)  Buyer shall have caused to be delivered to Seller an amount equal
     to the Purchase Price by Wire Transfer;

          (d)  Buyer shall have paid all transfer taxes required to be paid in
     connection with the sale and delivery to Buyer of the Shares, other than
     transfer taxes paid by Seller pursuant to Section 7.1(c);

                                      -37-
<PAGE>
 
          (e)  Buyer shall have caused to be delivered to Seller a receipt
     evidencing receipt by Buyer of the Shares;

          (f)  Buyer shall have caused to be delivered to Seller the Guarantee
     duly executed by Buyer;

          (g)  Buyer shall have caused to be delivered to Seller a certificate
     as to good standing of Buyer in the jurisdiction of its incorporation,
     dated as of a date not earlier than 10 days prior to the Closing Date,
     together with a copy of the Memorandum of Association of Buyer certified by
     the Registrar of Companies or other appropriate authority;

          (h)  Buyer shall have caused to be delivered to Seller resolutions of
     the board of directors of Buyer, certified by the Secretary or Assistant
     Secretary of Buyer, approving and authorizing the execution, delivery and
     performance of this Agreement and the Ancillary Agreements and the
     consummation of the transactions contemplated hereby and thereby;

          (i)  Buyer shall have delivered to Seller an opinion of Maples &
     Calder and an opinion of Mayer, Brown & Platt, each substantially in the
     form attached hereto as Exhibit F;

          (j)  A binding commitment in form and substance reasonably
     satisfactory to Seller for the Berkshire Hathaway Reinsurance Agreement
     shall have been duly executed by all the parties thereto and be in full
     force and effect; and

          (k)  Buyer shall have caused to be delivered to Seller a certificate
     executed by a duly authorized officer of Buyer certifying that the
     conditions set forth in this Section 7.2 have all been satisfied.

          Section 7.3  Mutual Conditions.  The obligations of each of Buyer and
                       -----------------                                       
Seller to effect the Closing shall be subject to the following conditions, any
one or more of which may be waived in writing, as to itself, by either party:

          (a)  No order, injunction or decree issued by any Governmental
     Authority of competent jurisdiction or other legal restraint or prohibition
     preventing the consummation of the transactions contemplated by this
     Agreement shall be in effect.  No proceeding initiated by any Governmental
     Authority seeking an injunction against the transactions contemplated by
     this Agreement shall be pending. No statute, rule, regulation, order,
     injunction or decree shall have been enacted, entered, promulgated or
     enforced by any Governmental Authority which prohibits, restricts or makes
     illegal consummation of the transactions contemplated hereby;

          (b)  All approvals of Governmental Authorities required to consummate
     the transactions contemplated hereby (including, without limitation,
     required approvals from the insurance regulatory authorities of the States
     of New York, California (if required), Georgia and Texas) shall have been
     obtained without any conditions, restrictions or limitations which would
     reasonably be expected to have either a Material Adverse Effect or a
     material adverse effect on the business, operations, assets, liabilities,
     condition (financial or otherwise) or results of operations of (i) Buyer
     and its subsidiaries, taken as a whole, or (ii) HoldCo and its subsidiaries
     (including the Insurance Subsidiaries and any other entities which will be
     subsidiaries of HoldCo immediately after the Closing has occurred), taken
     as a whole, and such consents, approvals and waivers shall remain in full
     force and effect and all statutory waiting periods in respect thereof shall
     have expired; provided that, for purposes of this Section 7.3(b) only, in
     determining whether a material 

                                      -38-
<PAGE>
 
     adverse effect with respect to HoldCo would reasonably be expected to
     occur, the GAAP consolidated stockholders' equity of HoldCo shall be deemed
     to be equal to the GAAP consolidated stockholders' equity of the Company
     and its Subsidiaries as of the end of the most recently completed calendar
     quarter prior to the Closing;

          (c)  In respect of the notifications of Buyer and Seller pursuant to
     the HSR Act, the applicable waiting period and any extensions thereof shall
     have expired or been terminated; and

          (d)  Article XIII of the Ridge Re Agreement shall be amended through
     the entering into of the Ridge Re Amendment (and such amendment shall have
     the effect of eliminating any profit commission payment upon the expiration
     of the term of such agreement and any commutation payment upon the
     commutation of such agreement).


                                   ARTICLE VIII

                    SURVIVAL OF REPRESENTATIONS, WARRANTIES,
                   COVENANTS AND AGREEMENTS; INDEMNIFICATION

          Section 8.1  Survival.  (a)  Notwithstanding any right of Buyer to
                       --------                                             
investigate the affairs of the Company and its Subsidiaries, and notwithstanding
any knowledge of facts determined or determinable by Buyer pursuant to such
investigation or right of investigation, Buyer has the right to rely upon the
representations, warranties, covenants and agreements of Seller contained in
this Agreement. The representations and warranties of the parties set forth in
Sections 4.1, 4.2, 4.3, 4.5, 4.7, 5.1, 5.2, 5.5, 5.6 and 5.7 shall survive the
Closing without limitation as to time.  All other representations and warranties
of the parties set forth in this Agreement shall terminate and expire on (i)
March 31, 1999, if the Closing occurs prior to January 1, 1998, or (ii) the date
18 months after the Closing Date if the Closing occurs on or after January 1,
1998, except that the representations and warranties of Seller in Sections 4.13
and 4.14 shall survive until 90 days after the expiration of the applicable
statute of limitations or extensions thereof with respect to the subject matter
thereof.  Notice with respect to any claim in respect of any inaccuracy in or
breach of any representation or warranty shall be in writing and shall be given
to the party against which such claim is asserted.  Any representation or
warranty shall survive the time it would otherwise terminate pursuant to this
Section 8.1 to the extent that the party claiming indemnification for such
breach shall have delivered to the other party written notice setting forth with
reasonable specificity the basis of such claim prior to the expiration of such
time pursuant to this Section 8.1.

          (b)  All covenants and agreements made by the parties to this
Agreement which contemplate performance following the Closing Date shall survive
the Closing Date. All other covenants and agreements shall not survive the
Closing Date and shall terminate as of the Closing.

          Section 8.2  Obligation of Seller to Indemnify, Reimburse, etc.
                       -------------------------------------------------- 
Subject to the limitations set forth in Sections 8.1, 8.5, 8.6 and 8.7, Seller
shall indemnify, reimburse, defend and hold harmless Buyer and its directors,
officers, employees, Affiliates, and their respective successors and assigns
from and against any Loss incurred by any of them based upon, arising out of or
otherwise in respect of (i) any inaccuracy in or any breach of any
representation or warranty of Seller (after taking into account the exceptions
to such representations and warranties which are set forth on the Schedules, as
supplemented in accordance with Sections 6.7(b) and 6.7(d), related to such
representations and warranties), (ii) the nonfulfillment on the part of Seller
of any unwaived covenant or agreement set forth in this Agreement which survives
the Closing Date in accordance with Section 8.1, (iii) the failure of Seller or
any ERISA Affiliate on or before the Closing Date to operate any employee
benefit plan (as defined in Section 3(3) of 

                                      -39-
<PAGE>
 
ERISA) established, maintained or sponsored by Seller or any ERISA Affiliate in
accordance with the terms of any such plan or Applicable Law, and (iv) the
transactions described in Section 6.11.

          Section 8.3  Obligation of Buyer to Indemnify, Reimburse, etc.
                       ------------------------------------------------- 
Subject to the limitations set forth in Sections 8.1, 8.5 and 8.7, Buyer shall
indemnify, defend and hold harmless Seller and its directors, officers,
employees, Affiliates, and their respective successors and assigns from and
against any Loss incurred by any of them based upon, arising out of or otherwise
in respect of (i) any inaccuracy in or breach of any representation or warranty
of Buyer (after taking into account the exceptions to such representations and
warranties which are set forth on the Schedules related to such representations
and warranties), and (ii) the nonfulfillment on the part of Buyer of any
unwaived covenant or agreement set forth in this Agreement which survives the
Closing Date in accordance with Section 8.1.

          Section 8.4  Notice and Opportunity to Defend Against Third Party
                       ----------------------------------------------------
Claims. (a)  Promptly after receipt from any third party by either party hereto
- ------                                                                         
(the "Indemnitee") of a notice of any demand, claim or circumstance that,
immediately or with the lapse of time, would give rise to a claim or the
commencement (or threatened commencement) of any action, proceeding or
investigation (an "Asserted Liability") that may result in a Loss for which
indemnification may be sought hereunder, the Indemnitee shall give written
notice thereof (the "Claims Notice") to the party obligated to provide
indemnification pursuant to Section 8.2 or 8.3 (the "Indemnifying Party"),
provided, however, that a failure to give such notice shall not prejudice the
Indemnitee's right to indemnification hereunder except to the extent that the
Indemnifying Party is actually prejudiced thereby.  The Claims Notice shall
describe the Asserted Liability in reasonable detail, and shall indicate the
amount (estimated, if necessary) of the Loss that has been or may be suffered by
the Indemnitee.

          (b)  The Indemnifying Party may elect to compromise or defend, at its
own expense and by its own counsel (reasonably acceptable to the Indemnified
Party), any Asserted Liability.  If the Indemnifying Party elects to compromise
or defend such Asserted Liability, it shall, within 20 Business Days following
its receipt of the Claims Notice (or sooner, if the nature of the Asserted
Liability so requires) notify the Indemnitee of its intent to do so, and the
Indemnitee shall cooperate, at the expense of the Indemnifying Party, in the
compromise of, or defense against, such Asserted Liability.  If the Indemnifying
Party (i) elects to compromise or defend the Asserted Liability but fails to
notify the Indemnitee of its election as herein provided, (ii) contests its
obligation to provide indemnification under this Agreement or (iii) fails to
contest such Asserted Liability in good faith in a timely manner, the Indemnitee
may pay, compromise or defend such Asserted Liability and the Indemnifying Party
shall be bound by the determination made in such Action.  Notwithstanding the
foregoing, neither the Indemnifying Party nor the Indemnitee may settle or
compromise any claim without the consent of the other party, provided, however,
that such consent to settlement or compromise shall not be unreasonably withheld
provided that an Indemnitee shall not be required to consent to any settlement
that (A) does not include as an unconditional term thereof the giving by the
claimant or the plaintiff of a release of the Indemnitee from all liability with
respect to such Action or (B) involves the imposition of equitable remedies or
the imposition of any material obligations on such Indemnitee other than
financial obligations for which such Indemnitee will be indemnified hereunder.
In any event, the Indemnitee and the Indemnifying Party may participate, at
their own expense, in the defense of such Asserted Liability; provided, however,
that if the defendants in any Action shall include both an Indemnifying Party
and any Indemnitee and such Indemnitee shall have reasonably concluded that
counsel selected by Indemnifying Party has a conflict of interest because of the
availability of different or additional defenses to such Indemnitee, such
Indemnitee shall have the right to select separate counsel to participate in the
defense of such Action on its behalf, at the expense of the Indemnifying Party;
provided that the Indemnifying Party shall not be obligated to pay the expenses
of more than one separate counsel for all Indemnitees, taken together. If the
Indemnifying Party chooses to defend any claim, the Indemnitee shall make
available to 

                                      -40-
<PAGE>
 
the Indemnifying Party any books, records or other documents within its control
that are necessary or appropriate for such defense.

          (c)  Amounts payable by the Indemnifying Party to the Indemnitee in
respect of any Losses for which such party is entitled to indemnification
hereunder shall be payable by the Indemnifying Party as incurred by the
Indemnitee.

          (d)  In the event of any dispute between the parties regarding the
applicability of the indemnification provisions of this Agreement, the
prevailing party shall be entitled to recover all Losses incurred by such party
arising out of, resulting from or relating to such dispute.

          Section 8.5  Net Indemnity.  The amount of any Loss from and against
                       -------------                                          
which either party is liable to indemnify, reimburse, defend and hold harmless
the other party or any other Person pursuant to Section 8.2 or Section 8.3 shall
be reduced by any insurance or other recoveries or any Tax benefit that such
indemnified Person realizes at any time as a result of or in connection with
such Loss and increased by any Taxes such indemnified Person realizes at any
time in respect of indemnification for such Loss.

          Section 8.6  Tax Indemnification.  Section 8.2 hereof shall provide
                       -------------------                                   
indemnification to Buyer for Taxes only to the extent that such Taxes are not
addressed by the Tax Agreement.  To the extent that Taxes are addressed by the
Tax Agreement, the provisions of the Tax Agreement shall govern the liabilities
and the indemnification rights and obligations of the parties without regard to
the limitations provided in this Article VIII.

          Section 8.7  Limits on Indemnification.  No party shall have any right
                       -------------------------                                
to seek indemnification under this Agreement (i) until Losses which would
otherwise be indemnifiable hereunder have been incurred by such party (including
by all other indemnitees affiliated with or related to such party), exceed
$3,000,000 in the aggregate, after insurance or other recoveries and on an
after-tax basis, and such party (including such affiliated or related Persons)
shall only be entitled to be indemnified for Losses in excess of such aggregate
amount, (ii) for an aggregate amount in excess of $116,550,000, (iii) for
punitive, special or consequential damages, or (iv) in respect of Losses to the
extent such Losses result from or arise out of actions taken by such party or an
Affiliate, employee, representative or agent thereof after the Closing.  If the
Closing has occurred, except as provided in Section 10.12, the remedies provided
by this Section 8.7 shall be the sole and exclusive remedy for the parties to
this Agreement with respect to any breach of this Agreement.


                                 ARTICLE IX

                                  TERMINATION

          Section 9.1  Termination. (a) This Agreement may be terminated on or
                       -----------                      
prior to the Closing Date only as follows:

          (i)   by mutual written consent of Buyer and Seller;

          (ii)  at the election of either Buyer or Seller, if the Closing Date
     shall not have occurred on or before February 28, 1998; provided that if
     the conditions set forth in Section 7.3(b) have not been satisfied as of
     such date, this Agreement may not be terminated until April 30, 1998, if it
     can reasonably be anticipated that such conditions can be satisfied by
     April 30, 1998, provided that no party shall be entitled to terminate this
     Agreement pursuant to this Section 9.1(a)(ii) if such 

                                      -41-
<PAGE>
 
     party's failure to fulfill any obligation under this Agreement has been the
     cause of, or resulted in, the failure of the Closing to occur on or before
     such date;

          (iii) by either Buyer or Seller if a court of competent jurisdiction
     shall have issued an order, decree or ruling permanently restraining,
     enjoining or otherwise prohibiting the transactions contemplated by this
     Agreement, and such order, decree, ruling or other action shall have become
     final and nonappealable; or

          (iv)  by Buyer if the impact of all matters disclosed on the
     supplemental Schedules permitted by Section 6.7(b) would be reasonably
     expected to have a Material Adverse Effect.

          (b)   The termination of this Agreement shall be effectuated by the
delivery of a written notice of such termination from the party terminating this
Agreement to the other party.

          Section 9.2  Obligations upon Termination.  In the event that this
                       ----------------------------                         
Agreement shall be terminated pursuant to Section 9.1, all obligations of the
parties hereto under this Agreement shall terminate and there shall be no
liability of any party hereto to any other party except (i) as set forth in
Section 6.2 and Section 6.3, and (ii) that nothing herein will relieve any party
from liability for any breach of this Agreement.

                                   ARTICLE X

                                 MISCELLANEOUS

          Section 10.1  Amendments; Extension; Waiver.  This Agreement may not
                        -----------------------------                         
be amended, altered or modified except by written instrument executed by Buyer
and Seller.

          Section 10.2  Entire Agreement.  (a)  This Agreement, the Tax
                        ----------------                               
Agreement, the Ancillary Agreements and the Confidentiality Agreement constitute
the entire understanding of the parties hereto with respect to the transactions
contemplated hereby, and supersede all prior agreements and understandings,
written and oral, among the parties with respect to the subject matter hereof.
Buyer acknowledges that neither Seller or any of its Affiliates, nor any
representative or advisor of any of them, has made any representation or
warranty to Buyer except as specifically made in this Agreement.  Except as
specifically provided for in this Agreement, all Tax matters among the parties
shall be governed by the Tax Agreement.

          (b) Buyer acknowledges that neither Seller or any of its Affiliates,
nor any representative or advisor of any of them, has made any representation or
warranty to Buyer except as specifically made in this Agreement.  In particular,
no such Person has made any representation or warranty to Buyer with respect to:
(i) any information set forth in the Confidential Offering Memorandum
distributed by Morgan Stanley & Co. Incorporated in connection with the proposed
sale of the Company and its Subsidiaries, or (ii) any financial projection or
forecast relating to the Company or its Subsidiaries. With respect to any such
projection or forecast delivered by or on behalf of Seller to Buyer, Buyer
acknowledges that: (A) there are uncertainties inherent in attempting to make
such projections and forecasts, (B) it is familiar with such uncertainties, (C)
it is taking full responsibility for making its own evaluation of the adequacy
and accuracy of all such projections and forecasts so furnished to it, (D) it is
not acting in reliance on any such projection or forecast so furnished to it,
and (E) it shall have no claim against any such Person with respect to any such
projection or forecast.

                                     -42-
<PAGE>
 
          Section 10.3  Interpretation.  When reference is made in this
                        --------------                                 
Agreement to Sections, Exhibits or Schedules, such reference is to the Sections,
Exhibits or Schedules of this Agreement unless otherwise indicated.  The table
of contents and headings contained in this Agreement are for reference purposes
only and shall not affect in any way the meaning or interpretation of this
Agreement.  Whenever the words "include," "includes" or "including" are used in
this Agreement, they shall be deemed to be followed by the words "without
limitation."  The phrases "the date of this Agreement," "the date hereof" and
terms of similar import, unless the context otherwise requires, shall be deemed
to refer to the date set forth in the first paragraph of this Agreement.  The
words "hereof", "herein", "hereby" and other words of similar import refer to
this Agreement as a whole unless otherwise indicated.  Whenever the singular is
used herein, the same shall include the plural, and whenever the plural is used
herein, the same shall include the singular, where appropriate.

          Section 10.4  Severability.  Any term or provision of this Agreement
                        ------------                                          
which is invalid or unenforceable in any jurisdiction shall, as to that
jurisdiction, be ineffective to the extent of such invalidity or
unenforceability without rendering invalid or unenforceable the remaining terms
and provisions of this Agreement or affecting the validity or enforceability of
any of the terms or provisions of this Agreement in any other jurisdiction.  If
any provision of this Agreement is so broad as to be unenforceable, that
provision shall be interpreted to be only so broad as is enforceable.

          Section 10.5  Notices.  All notices and other communications hereunder
                        -------                                                 
shall be in writing and shall be deemed given if they are:  (a) delivered in
person, (b) transmitted by facsimile (with confirmation), (c) mailed by
certified or registered mail (return receipt requested), or (d) delivered by an
express courier (with confirmation) to a party at its address listed below (or
at such other address as such party shall deliver to the other party by like
notice):

          To Seller:      Talegen Holdings, Inc.
                          1011 Western Avenue, Suite 1000
                          Seattle, Washington  98104

                          Facsimile:  (206) 654-2601
                          Attention:  Richard N. Frasch, Esq.
                                    General Counsel

          With a copy to: LeBoeuf, Lamb, Greene & MacRae, L.L.P.
                          125 West 55th Street
                          New York, NY  10019-4513
 
                          Facsimile:  (212) 424-8500
                          Attention:  Peter R. O'Flinn, Esq.
 
          To Buyer:       ACE Limited
                          The ACE Building
                          30 Woodbourne Avenue
                          Hamilton HM 08 Bermuda
 
                          Facsimile:  (441) 292-8620
                          Attention:  Peter Mear, Esq., General Counsel

                                     -43-
<PAGE>
 
         With a copy to:  Mayer, Brown & Platt
                                 190 South LaSalle Street
                                 Chicago, Illinois 60603

                                 Facsimile:  (312) 701-7711
                                 Attention:   Edward S. Best, Esq.

          Section 10.6  Binding Effect; Persons Benefiting.  This Agreement
                        ----------------------------------                 
shall inure to the benefit of and be binding upon the parties hereto and the
respective successors and permitted assigns of the parties and such Persons.
Nothing in this Agreement is intended or shall be construed to confer upon any
entity or Person other than the parties hereto and their respective successors
and permitted assigns any right, remedy or claim under or by reason of this
Agreement or any part hereof.

          Section 10.7  Assignment.  Neither this Agreement or the Ancillary
                        ----------                                          
Agreements, nor any of the rights, interests or obligations under this Agreement
or the Ancillary Agreements, shall be assigned, in whole or in part, by
operation of law or otherwise by either of the parties hereto without the prior
written consent of the other party, and any such assignment that is not
consented to shall be null and void, except that before or after the Closing
Buyer shall have the right, without such consent, to assign to a direct or
indirect wholly-owned subsidiary of Buyer its rights and obligations under this
Agreement and the Ancillary Agreements, provided that no such assignment shall
relieve Buyer of its obligations hereunder or thereunder if such assignee does
not perform such obligations.

          Section 10.8  Counterparts.  This Agreement may be executed in two or
                        ------------                                           
more counterparts, each of which shall be deemed an original, but all of which
taken together shall constitute one and the same agreement, it being understood
that all of the parties need not sign the same counterpart.

          Section 10.9  No Prejudice.  This Agreement has been jointly prepared
                        ------------                                           
by the parties hereto and the terms hereof shall not be construed in favor of or
against any party on account of its participation in such preparation.

          Section 10.10  Governing Law.  THIS AGREEMENT, THE LEGAL RELATIONS
                         -------------                                      
BETWEEN THE PARTIES AND THE ADJUDICATION AND THE ENFORCEMENT THEREOF SHALL BE
GOVERNED BY AND INTERPRETED AND CONSTRUED IN ACCORDANCE WITH THE SUBSTANTIVE
LAWS OF THE STATE OF NEW YORK.

          Section 10.11  Service; Jurisdiction.  Each of the parties hereto
                         ---------------------                             
agrees to personal jurisdiction in any action brought in any court, federal or
state, within the State of New York having subject matter jurisdiction over
matters arising under this Agreement.

          Section 10.12  Specific Performance.  Each of the parties hereto
                         --------------------                             
acknowledges and agrees that the other parties hereto would be irreparably
damaged in the event any of the provisions of this Agreement were not performed
in accordance with their specific terms or were otherwise breached. Accordingly,
each of the parties hereto agrees that they each shall be entitled to an
injunction or injunctions to prevent breaches of the provisions of this
Agreement and to enforce specifically this Agreement and the terms and
provisions hereof in any action instituted in any court of the United States or
any state thereof having subject matter jurisdiction, in addition to any other
remedy to which any of the parties may be entitled, at law or in equity.

                                     -44-
<PAGE>
 
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be executed as of the date first set forth above.

                                 TALEGEN HOLDINGS, INC.


                                 By: _____________________
                                     Name:    
                                     Title:    


                                 ACE LIMITED


                                 By: _____________________
                                     Name: 
                                     Title:    

                                     -45-
<PAGE>
 
                                                                       EXHIBIT A


                          FORM OF GUARANTEE AGREEMENT

          This GUARANTEE AGREEMENT (this "Guarantee") is made and entered into
as of _________, 199_ by and between Xerox Financial Services, Inc. (the
"Guarantor"), a Delaware corporation, and ACE Limited, a Cayman Islands
corporation ("Buyer").

          WHEREAS, Buyer and Talegen Holdings, Inc., a Delaware corporation
("Talegen") and a wholly-owned subsidiary of the Guarantor, have entered into a
Stock Purchase Agreement, dated as of September 18, 1997 (the "Purchase
Agreement"), which provides for the acquisition by Buyer of all of the
outstanding capital stock of Westchester Specialty Group, Inc., a Delaware
corporation ("WSG"), a wholly-owned subsidiary of Talegen;

          WHEREAS, Ridge Reinsurance Limited, a Bermuda corporation ("Ridge
Re"), and the Insurance Subsidiaries (as defined in the Purchase Agreement) have
entered into an Aggregate Excess of Loss Reinsurance Agreement, dated as of
December 31, 1992, as amended (the "Ridge Re Agreement"); and

          WHEREAS, as an inducement to Buyer to enter into and consummate the
transactions contemplated by the Purchase Agreement, the Guarantor has agreed to
enter into this Guarantee;

          NOW THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto, intending to be legally bound, agree as
follows:

          1.  The Guarantor hereby unconditionally and irrevocably guarantees to
Buyer and to the other Protected Parties (as defined below) the due, punctual
and full payment of (a) all amounts payable by Talegen under Article VIII of the
Purchase Agreement and (b) all amounts payable by Ridge Re under the Ridge Re
Agreement, in each case as and when the same shall become due and payable in
accordance with the terms thereof.  As used in this Agreement, the term
"Protected Parties" shall mean Buyer and its directors, officers, employees,
Affiliates (as defined in the Purchase Agreement) and their respective
successors and assigns, including WSG and its subsidiaries.

          2.  This Guarantee is a guarantee of payment, performance and
compliance when due, and is in no way conditional or contingent upon any other
event, contingency or circumstance whatsoever (other than the condition that
Talegen or Ridge Re, as the case may be, fails to pay or perform its respective
obligations when due or when required to be performed).

          3.  The covenants and agreements of the Guarantor set forth in this
Guarantee and the Guarantor's obligations under this Agreement shall be absolute
and unconditional, shall not be subject to any counterclaim, setoff, deduction,
diminution, abatement, recoupment, suspension, deferment, reduction or defense
(other than full and strict compliance by the Guarantor with its obligations
hereunder) based upon any claim that the Guarantor or any other Person or entity
has against Talegen, Ridge Re or any other Person or entity (other than Buyer),
and shall remain in full force and effect without regard to, and shall not be
released, discharged or in any way affected by, any circumstance or condition
whatsoever (whether or not the Guarantor shall have any knowledge or notice
thereof). The obligations of the Guarantor set forth in this Guarantee
constitute the full recourse obligations of the Guarantor enforceable against it
to the
<PAGE>
 
full extent of all of the Guarantor's assets and properties, notwithstanding any
provision in any agreement limiting the liability of any other Person or entity.

          4.  The Guarantor hereby waives notice of, and consents to, any change
in the time, manner or place of payment or performance, and any other amendment
or waiver, or any consent to departure or other indulgence, from time to time
granted to Talegen or Ridge Re by Buyer or any other Protected Party with
respect to the matters guaranteed hereunder, and the Guarantor hereby waives
notice of nonperformance or nonpayment and, except as provided herein, all other
notices and demands whatsoever and any requirement that Buyer or any other
Protected Party protect, secure, perfect or insure any security interest or lien
or any property subject thereto or exhaust any right.

          5.  No amendment or waiver of any provision of this Guarantee nor any
consent to any departure by the Guarantor herefrom shall in any event be
effective unless the same shall be in writing and signed by the party or parties
against whom such amendment or waiver is sought to be enforced, and then such
waiver or consent shall be effective only in the specific instance and for the
specific purpose for which given.  No failure on the part of any party to
exercise or delay in exercising any right hereunder shall operate as a waiver
of, nor shall any single or partial exercise of any right hereunder preclude any
other or further exercise thereof or the exercise of, any other right.  The
remedies herein provided are cumulative and not exclusive of any remedies
provided by law.

          6.  The Guarantor represents and warrants to Buyer and to the other
Protected Parties as follows:

              (a) The Guarantor is a corporation duly organized, validly
     existing and in good standing under the laws of the State of Delaware.  The
     Guarantor is duly qualified to do business in each jurisdiction in which
     the ownership of properties by the Guarantor and the business and
     activities of the Guarantor require such qualification, except where the
     failure to be so qualified would not have a material adverse effect on the
     financial condition, business or results of operation of the Guarantor or
     on the ability of the Guarantor to perform its obligations under this
     Guarantee;

              (b) The Guarantor has full power, authority and legal right to
     own its properties and to carry on its business as now conducted and is
     duly authorized and empowered to execute, deliver and perform its
     obligations under this Guarantee;

              (c) This Guarantee has been duly authorized, executed and
     delivered by the Guarantor and constitutes a legal, valid and binding
     instrument, enforceable against the Guarantor in accordance with its terms,
     except as enforcement may be limited by general principles of equity,
     whether applied in a court of law or a court of equity, and by bankruptcy,
     insolvency, moratorium and similar laws affecting creditors' rights and
     remedies generally; and

              (d) Neither the execution and delivery of this Guarantee by the
     Guarantor, nor the consummation by the Guarantor of the transactions
     contemplated hereby to be performed by it, nor compliance by the Guarantor
     with any of the terms or provisions hereof, will (i) violate any provision
     of the Certificate of Incorporation or By-Laws of the Guarantor or (ii)
     violate in any material respect any Applicable Law with respect to the
     Guarantor, or any of its material properties or assets.

          7.  This Guarantee is a continuing guarantee and shall remain in full
force and effect until payment in full of the obligations and all other amounts
payable under this Guarantee and shall(a) be

                                      A-2
<PAGE>
 
binding upon the Guarantor, its successors and assigns, and (b) inure to the
benefit of and be enforceable by (i) any successors of Buyer, or any transferee
of all or substantially all of the assets of Buyer, and (ii) any successors,
heirs, executors or beneficiaries of any of the other Protected Parties. Neither
the terms nor execution of this Guarantee shall prohibit the Guarantor's sale,
assignment or transfer of all or a part of its interest in Talegen or Ridge Re;
provided, however, that in the event of any such sale, assignment or transfer,
this Guarantee shall remain in full force and effect.

          8.   Any provision of this Guarantee which is prohibited or
unenforceable in any jurisdiction shall be, as to such jurisdiction, ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof, and any such prohibition on unenforceability in any
jurisdiction shall not invalidate or render unenforceable such provision in any
other jurisdiction.

          9.   This Guarantee shall be governed, construed, applied and enforced
in accordance with the laws of the State of New York, and no defense given or
allowed by the laws of any other state or country shall be interposed in any
action hereon unless such defense is also given or allowed by the laws of the
State of New York.

          10.  This Agreement is not intended to confer upon any person other
than the parties hereto and the other Protected Parties any rights or remedies
hereunder.

          11.  This Guarantee may be executed in any number of counterparts, and
each such counterpart shall be deemed to be an original instrument, but all such
counterparts together shall constitute but one agreement.  This Guarantee shall
become effective when one or more counterparts have been signed by each of the
parties and delivered to the other parties, it being understood that the parties
need not sign the same counterpart.

                                      A-3
<PAGE>
 
          IN WITNESS WHEREOF, each of the parties hereto has caused this
Guarantee to be executed on its behalf by its duly authorized officer.

                                    XEROX FINANCIAL SERVICES, INC.



                                    By:___________________________
                                       Name:
                                       Title:


                                    ACE LIMITED



                                    By:___________________________
                                       Name:                         
                                       Title:  

                                      A-4
<PAGE>
 
                                                                       EXHIBIT B

                          FORM OF RIDGE RE AMENDMENT



                                ENDORSEMENT #2

                                    TO THE

                                SPRINGING FIRST

                           AGGREGATE EXCESS OF LOSS

                             REINSURANCE AGREEMENT

                                By and between

                      WESTCHESTER FIRE INSURANCE COMPANY
                  WESTCHESTER SURPLUS LINES INSURANCE COMPANY
               (formerly Industrial Indemnity Company of Hawaii)
                   INDUSTRIAL UNDERWRITERS INSURANCE COMPANY

                                      and

                           RIDGE REINSURANCE LIMITED

                                      and

                        XEROX FINANCIAL SERVICES, INC.
<PAGE>
 
     I.   Article XIII entitled "Term, Termination and Commutation" is hereby
amended by deleting it in its entirety and inserting the following new Article
XIII entitled "Term, Termination and Commutation":

                                 ARTICLE XIII
                                 ------------

                       TERM, TERMINATION AND COMMUTATION
                       ---------------------------------

          (a) Term.  This Agreement shall be effective as of the date hereof and
              ----                                                              
shall remain in effect until the natural expiry of all liabilities on the
Subject Business, or until termination or commutation in accordance with
Sections (b) and (c) of this Article XIII.

          (b) Termination.  Except as provided for in Section (c) of this
              -----------                                                
Article, this Agreement shall be noncancelable, except at the discretion of the
Commissioner acting as rehabilitator, liquidator or receiver of the Company or
the Reinsurer.

          (c) Commutation.  At the end of each full calendar year from and
              -----------                                                 
including 2002 to and including 2007, the Company and the Reinsurer shall
attempt to commute this Agreement by mutual consent.  If no commutation or other
termination of this Agreement occurs prior to the end of the calendar year 2007,
the Company and the Reinsurer shall commute this Agreement either by mutual
consent at a price to be agreed or, if no agreement is reached by June 30, 2008,
the Company and the Reinsurer shall submit to binding arbitration by a
nationally recognized actuarial firm, reasonably acceptable to both parties,
whose decision as to price shall be final and binding on the Company and the
Reinsurer. Notwithstanding anything in the foregoing to the contrary, until June
30, 2008 the parties may arbitrarily refuse to agree to a commutation.

          (d) Due and Unpaid Obligations.  Notwithstanding anything herein to
              --------------------------                                     
the contrary, any unpaid or outstanding obligations of the Reinsurer due or
overdue the Company at the time of the termination, commutation or expiration of
this Agreement shall be paid upon such termination, commutation or expiration of
this Agreement.


     II.  Article XVIII entitled "Miscellaneous" is hereby amended by inserting
at the end thereof a Section (g) to read as follows:

          "(g) Waiver of Offset Rights by Reinsurer.  The Reinsurer shall pay to
               ------------------------------------                             
the Company any and all amounts payable hereunder without regard to any rights
of offset that the Reinsurer may have against the Company or XFS, any such
rights of offset hereby being waived."

          IN WITNESS WHEREOF the parties hereto have caused this Endorsement to
be executed on their behalf by their respective officers thereunto duly
authorized as of the date first written in the Agreement to which this
Endorsement applies.


                                    RIDGE REINSURANCE LIMITED

                                      B-2
<PAGE>
 
                                    By:___________________________
                                       Name:
                                       Title:
Attest:


By:_______________________
   Name:
   Title:

                                    WESTCHESTER FIRE
                                    INSURANCE COMPANY


                                    By:___________________________
                                       Name:
                                       Title:
Attest:


By:_______________________
   Name:
   Title:

                                      B-3
<PAGE>
 
                                    WESTCHESTER SURPLUS LINES
                                    INSURANCE COMPANY
 

                                    By:___________________________
                                       Name:
                                       Title:
Attest:


By:_______________________
  Name:
  Title:


                                    INDUSTRIAL UNDERWRITERS
                                    INSURANCE COMPANY


                                    By:___________________________
                                       Name:
                                       Title:

Attest:



By:_______________________
  Name:
  Title:

                                    XEROX FINANCIAL SERVICES, INC.


                                    By:___________________________
                                       Name:
                                       Title:
Attest:



By:_______________________
  Name:
  Title:

                                      B-4
<PAGE>
 
                                                                       EXHIBIT C

                                   [NOT USED]
<PAGE>
 
                                                                       EXHIBIT D


                   FORM OF RELEASE OF TAX SHARING AGREEMENTS

          This Release of obligations under the Xerox Corporation/Crum and
Forster, Inc. Federal Income Tax Allocation Agreement ("Xerox/C&F Tax Sharing
Agreement") and obligations under the Crum and Forster, Inc. Federal Income Tax
Allocation Agreement ("C&F Tax Sharing Agreement") is made and entered into by
and among Xerox Corporation, a New York corporation ("Xerox"); Xerox Financial
Services, Inc., a Delaware corporation ("XFS"); Talegen Holdings, Inc., a
Delaware corporation ("Talegen"); and Westchester Specialty Group, Inc., a
Delaware corporation (the "Company"), Westchester Fire Insurance Company, a New
York corporation, Westchester Surplus Lines Insurance Company, a Georgia
corporation, Industrial Underwriters Insurance Company, a Texas corporation,
Westchester Specialty Insurance Services, Inc., a Nevada corporation, and
Industrial Excess & Surplus Insurance Brokers, a California corporation
(collectively, the "Company Subsidiaries"), dated as of ____________ __, 1997.

          WHEREAS, XFS, Talegen, and the Company are among the parties to the
Purchase Agreement and the Tax Agreement, as defined herein;

          WHEREAS, as of the Closing Date, Section 11(d) of the Tax Agreement
terminates, with respect to the Company and the Company Subsidiaries, any and
all agreements with respect to Taxes (other than the Purchase Agreement and the
Tax Agreement) to which the Company or any of the Company Subsidiaries, on the
one hand, and Talegen or any of its subsidiaries (other than the Company and the
Company Subsidiaries), on the other hand, are or were parties at any time at or
before the Closing Date;

          WHEREAS, as of the Closing Date, Section 11(d) of the Tax Agreement
extinguishes, with respect to the Company and the Company Subsidiaries, any and
all liabilities with respect to Taxes (other than under the Purchase Agreement
and the Tax Agreement) between the Company or any of the Company Subsidiaries,
on the one hand, and Talegen or any of its subsidiaries (other than the Company
and the Company Subsidiaries), on the other hand, that exist on the Closing
Date; and

          WHEREAS, pursuant to paragraph 6.19 of the Purchase Agreement, it has
been agreed that the Company and each of the Company Subsidiaries shall execute
and deliver to Xerox, XFS and Talegen, and Xerox, XFS and Talegen shall execute
and deliver to the Company and each of the Company Subsidiaries, releases of any
and all obligations under tax sharing agreements (other than under the Tax
Agreement) existing as of the Closing Date;

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

          1.   Definitions.

               a.   "C&F TAX SHARING AGREEMENT" -- the Federal Income Tax
Allocation Agreement by and between Crum and Forster, Inc., a New Jersey
Corporation ("C&F") (now Talegen), and each of its subsidiaries incorporated in
the United States, effective January 11, 1983 and amended April 15, 1992,
referenced in and made part of the Xerox/C&F Tax Sharing Agreement.

               b.   "CLOSING DATE" -- the Closing Date as defined in the
Purchase Agreement.
<PAGE>
 
               c.   "PURCHASE AGREEMENT" -- the stock purchase agreement, dated
as of September 18, 1997, pursuant to which ACE Limited, a Cayman Islands
corporation ("Buyer"), will purchase from Talegen, and Talegen will sell to
Buyer, all of the issued and outstanding capital stock of the Company.

               d.   "TAX AGREEMENT" -- the Tax Allocation and Indemnification
Agreement dated as of the date of the Purchase Agreement and made and entered
into among XFS, Talegen, the Company and Buyer.

               e.   "TAXES" -- Taxes as defined in the Tax Agreement.

               f.   "XEROX/C&F TAX SHARING AGREEMENT" -- the Federal Income Tax
Allocation Agreement by and between Xerox and C&F on behalf of C&F and its
subsidiaries incorporated in the United States, effective January 11, 1983, and
amended April 15, 1992.

          2.   As of the Closing Date, the Company and each of the Company
Subsidiaries hereby fully and completely release Xerox, XFS and Talegen, and
each of them, and Xerox, XFS and Talegen hereby fully and completely release the
Company and each of the Company Subsidiaries, from any and all obligations
contained in or derived from either the Xerox/C&F Tax Sharing Agreement or the
C&F Tax Sharing Agreement.  There shall be no continuing obligations pursuant to
the termination provisions of either the Xerox/C&F Tax Sharing Agreement or the
C&F Tax Sharing Agreement.

          3.   The Company and each of the Company Subsidiaries understands that
neither Xerox, XFS, nor Talegen shall make any payments on or after the Closing
Date to the Company or any of the Company Subsidiaries under either the
Xerox/C&F Tax Sharing Agreement or the C&F Tax Sharing Agreement, and that
payments, if any, to the Company and the Company Subsidiaries from Xerox, XFS or
Talegen on and after the Closing Date with respect to Taxes shall be made
pursuant only to the Tax Agreement.

          4.   Xerox, XFS and Talegen understand that the Company and the
Company Subsidiaries shall not make any payments on or after the Closing Date
under either the Xerox/C&F Tax Sharing Agreement or the C&F Tax Sharing
Agreement and that any payments to Xerox, XFS or Talegen on or after the Closing
Date with respect to Taxes shall be made pursuant only to the Tax Agreement.

          5.   This Release shall be binding on and inure to the benefit of any
successor, by merger, acquisition of assets, or otherwise, to any of the parties
hereto to the same extent as if such successor had been an original party to
this Release.

          6.   Except as provided in paragraph 5 above, this Release shall be
neither assignable nor transferable by any party hereto, whether by operation of
law or otherwise, without the prior consent of the other parties hereto.

                                      D-2
<PAGE>
 
          7.   This Release shall be governed by and construed in accordance
with the laws of the State of New York.

                              XEROX CORPORATION


                              By:_____________________________
                                    Name:
                                    Title:


                              XEROX FINANCIAL SERVICES, INC.


                              By:_____________________________
                                    Name:
                                    Title:


                              TALEGEN HOLDINGS, INC.


                              By:_____________________________
                                    Name:
                                    Title:


                              WESTCHESTER SPECIALTY GROUP, INC.


                              By:_____________________________
                                    Name:
                                    Title:


                              WESTCHESTER FIRE INSURANCE COMPANY


                              By:_____________________________
                                    Name:
                                    Title:


                              WESTCHESTER SURPLUS LINES INSURANCE COMPANY


                              By:_____________________________
                                    Name:

                                      D-3
<PAGE>
 
                                    Title:


                              INDUSTRIAL UNDERWRITERS INSURANCE 
                              COMPANY


                              By:_____________________________
                                    Name:
                                    Title:


                              WESTCHESTER SPECIALTY INSURANCE SERVICES,    
                              INC.


                              By:_____________________________
                                    Name:
                                    Title:


                              INDUSTRIAL EXCESS & SURPLUS INSURANCE 
                              BROKERS


                              By:_____________________________
                                    Name:
                                    Title:

                                      D-4
<PAGE>
 
                                                                       EXHIBIT E

           FORM OF OPINION OF LEBOEUF, LAMB, GREENE & MACRAE, L.L.P.

          1.  Seller is a corporation duly incorporated, validly existing and in
good standing under the laws of the State of Delaware.

          2.  Upon the delivery of and payment for the Shares as provided under
the Agreement, and issuance of new certificates representing the Shares in the
name of Buyer, and assuming that Buyer effected its purchase in good faith and
without notice of an adverse claim within the meaning of Section 8-302 of the
New York Uniform Commercial Code, Buyer will acquire Seller's rights in the
Shares free of any adverse claim.

          3.  (a)   Seller has full corporate power and authority to execute and
deliver the Agreement and the Tax Agreement and to consummate the transactions
contemplated thereby.  The execution and delivery of the Agreement and the Tax
Agreement and the consummation of the transactions contemplated thereby have
been duly and validly approved by all requisite corporate action on the part of
Seller, and no other corporate proceedings on the part of Seller are necessary
to approve the Agreement or the Tax Agreement or to consummate the transactions
contemplated thereby.  The Agreement and the Tax Agreement have been duly and
validly executed and delivered by Seller and (assuming the due authorization,
execution and delivery of the Agreement and the Tax Agreement by Buyer and the
other parties thereto) constitute valid and binding obligations of Seller,
enforceable against Seller in accordance with their respective terms, except as
enforcement may be limited by general principles of equity, whether applied in a
court of law or a court of equity, and by bankruptcy, insolvency, moratorium and
similar laws affecting creditors' rights and remedies generally.

              (b)   Parent has full corporate power and authority to enter into
the Guarantee and to consummate the transactions contemplated thereby. The
execution and delivery by Parent of the Guarantee and the consummation of the
transactions contemplated thereby have been duly authorized by all requisite
corporate action on the part of Parent, and no other corporate proceedings are
required on the part of Parent to approve the Guarantee or to authorize the
transactions contemplated thereby. The Guarantee has been duly executed and
delivered by Parent and, assuming the due authorization, execution and delivery
by the other party thereto, constitutes the valid and binding obligations of
Parent, enforceable in accordance with its terms, except as enforcement may be
limited by general principles of equity, whether applied in a court of law or a
court of equity, and by bankruptcy, insolvency, moratorium and similar laws
affecting creditors' rights and remedies generally.

          4.   Except for the applicable filings under the HSR Act and the
filing of a notice pursuant to the Exon-Florio Amendment, no consents or
approvals of or filings or registrations under New York law or the federal law
of the United States are necessary in connection with (i) the execution and
delivery by Seller of the Agreement, and (ii) the consummation by Seller of the
transactions contemplated thereby, other than those filings, consents and
approvals which have been obtained.
<PAGE>
 
                                                                       EXHIBIT F


                       FORM OF OPINION OF MAPLES & CALDER

          1.   Buyer is a corporation duly incorporated, validly existing and in
good standing under the laws of the Cayman Islands.

          2.   Buyer has full corporate power and authority to execute and
deliver the Agreement and the Ancillary Agreements and to consummate the
transactions contemplated thereby.  The execution and delivery of the Agreement
and the Ancillary Agreements and the consummation of the transactions
contemplated thereby have been duly and validly approved by all requisite
corporate action on the part of Buyer, and no other corporate proceedings on the
part of Buyer are necessary to approve the Agreement or the Ancillary Agreements
or to consummate the transactions contemplated thereby. The Agreement and the
Ancillary Agreements have been duly and validly executed and delivered by Buyer
and (assuming the due authorization, execution and delivery of the Agreement and
the Ancillary Agreements by Seller and the other parties thereto) constitute
valid and binding obligations of Buyer, enforceable against Buyer in accordance
with their respective terms, except as enforcement may be limited by general
principles of equity, whether applied in a court of law or a court of equity,
and by bankruptcy, insolvency, moratorium and similar laws affecting creditors'
rights and remedies generally.


                    FORM OF OPINION OF MAYER, BROWN & PLATT

          1.   Except for the applicable filings under the HSR Act and the
filing of a notice pursuant to the Exon-Florio Amendment, no consents or
approvals of or filings or registrations under New York law or the federal law
of the United States are necessary in connection with (i) the execution and
delivery by Buyer of the Agreement, and (ii) the consummation by Buyer of the
transactions contemplated thereby, other than those filings, consents and
approvals which have been obtained.
<PAGE>
 
<TABLE>
<CAPTION>
                                                                                                ------------------------------------
CENTRAL SECRETARIAL CONTROL SHEET                                                                JOB #:
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                               <C>
                                              PLEASE COMPLETE THIS FORM IN ENTIRETY.
                          WRITE OUT ALL SPECIAL INSTRUCTIONS TO ASSURE THAT YOUR WORK WILL BE COMPLETED.
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ATTORNEY:RABINOWITZ                                    ATTORNEY #:  5111                                EXT.:    8029
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CLIENT:.                                               CLIENT #:    19350                               FLOOR:
- -------------------------------------------------------------------------------------------------------=============================
MATTER:                                                MATTER #:    769                                             OVERTIME
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DOCUMENT TITLE:  STOCK PURCHASE AGREEMENT
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</TABLE>
                                                                                

<PAGE>
 
                                                                     EXHIBIT 2.3

                 TAX ALLOCATION AND INDEMNIFICATION AGREEMENT

     This Tax Allocation and Indemnification Agreement ("Agreement"), dated as
of September 18, 1997, is made and entered into by and among Xerox Financial
Services, Inc., a Delaware corporation ("Parent"), Talegen Holdings, Inc., a
Delaware corporation ("Seller"), Westchester Specialty Group, Inc., a Delaware
corporation ("Company"), and ACE Limited, a Cayman Islands corporation
("Buyer").

     A.  Seller and Buyer are parties to a Stock Purchase Agreement dated as of
September  18, 1997 ("Purchase Agreement"), pursuant to which Buyer or its
assigns will purchase from Seller, and Seller will sell to Buyer or its assigns,
all of the issued and outstanding capital stock of the Company.

     B.  The parties hereto wish to provide for indemnification against certain
liabilities for Taxes and for payments relating to certain Tax benefits, as set
forth herein.  The parties also desire to allocate responsibility for the
preparation and filing of Tax Returns and the payment of Taxes, and provide for
related matters.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein and in the Purchase Agreement, the parties hereby agree as
follows:

     1.  Definitions.  When used herein, the following terms shall have the
         -----------                                                       
following meanings:

     "Additional Consideration " -- as defined in the Section (f)(ii)(C) hereof.
      ------------------------                                                  

     "Affiliate " -- as defined in the Purchase Agreement.
      ---------                                           

     "Allocated AMT Credit " -- as defined in Section 5(f)(ii)(B) hereof.
      --------------------                                               

     "Closing" -- as defined in the Purchase Agreement.
      -------                                          

     "Closing Date" -- as defined in the Purchase Agreement.
      ------------                                          

     "Code" -- the Internal Revenue Code of 1986, as amended.
      ----                                                   

     "Company Federal Tax Settlement Payment Schedule" -- as defined in Section
      -----------------------------------------------                          
3(d)(i) hereof.

     "Company GAAP Financial Statements" -- as defined in the Purchase
      ---------------------------------                               
Agreement.
<PAGE>
 
     "Company Group" -- Company and each other corporation that joins with
      -------------                                                       
Company in filing a consolidated federal Income Tax Return for the applicable
Taxable Year, and every other corporation that is, at any time after the Closing
Date, a direct or indirect United States Subsidiary of Buyer or any such
includable corporation.

     "Company Pro Forma Alternative Minimum Taxable Income or Loss" -- Company
      -------------------------------------------------------------           
Pro Forma Taxable Income or Loss modified as required under the provisions the
Code to determine alternative minimum taxable income.

     "Company Pro Forma Taxable Income or Loss" -- as defined in Section 3(c)(i)
      ----------------------------------------                                  
hereof.

     "Crostex/Camfex Leases" -- as defined in the Purchase Agreement.
      -----------------------                                         

     "Crostex/Camfex Purchase Money Documents" -- as defined in the Purchase
     -----------------------------------------                              
Agreement.

     "Federal Tax Settlement Payment" -- as defined in Section 3(b) hereof.
      ------------------------------                                       

     "Final Company Federal Tax Settlement Payment Schedule"-- as defined in
      -----------------------------------------------------                 
Section 3(d)(iii)(B)  hereof.

     "Final Parent Federal Tax Settlement Payment Schedule" -- as defined in
      ----------------------------------------------------                  
Section 3(d)(iii)(B)  hereof.

     "Final Determination" -- (i) a decision, judgment, decree or other order by
      -------------------                                                       
the United States Tax Court or any other court of competent jurisdiction, that
has become final and unappealable, (ii) a closing agreement under Section 7121
of the Code or a comparable provision of any state, local or foreign Tax law
that is binding against the Internal Revenue Service or other Taxing Authority,
(iii) any other final settlement with the Internal Revenue Service or other
Taxing Authority, or (iv) the expiration of an applicable statute of
limitations.

     "Income Tax" -- with respect to any corporation or group of corporations,
      ----------                                                              
any and all Taxes based upon or measured by net income, including, but not
limited to any alternative or add-on minimum taxes, and any "special estimated
tax payment" made pursuant to Section 847 of the Code, imposed by the Internal
Revenue Service or any other Taxing Authority, together with interest, penalties
and other additions.

     "Income Tax Return" -- with respect to any corporation or group of
      -----------------                                                
corporations, any Tax Return with respect to Income Tax.

                                       2
<PAGE>
 
     "Independent Accounting Firm" -- means any "Big Six" accounting firm or its
      ---------------------------                                               
successor, except for the respective independent public accountants of Seller,
Buyer or their respective Affiliates or Subsidiaries.

     "Information Return" -- with respect to any corporation or group of
      ------------------                                                
corporations, any and all reports, returns, declarations or other filings (other
than Tax Returns), including but not limited to federal and state wage
reporting, employment, and unemployment Tax returns (e.g., IRS Forms 940, 941,
                                                     ----                     
W-2, W-3 and their state and local equivalents) as well as reports of payments
made (e.g., IRS Forms 1099 and 1042), that are required under applicable law to
      ----                                                                     
be supplied to any Taxing Authority.

     "Insurance Subsidiaries" -- as defined in the Purchase Agreement.
      ----------------------                                          

     "1990 through 1994 Uncollectible Reinsurance Deductions" -- the net
      ------------------------------------------------------            
incremental deductions to which Company and its Subsidiaries are entitled for
uncollectible reinsurance recoverables for the 1990 through 1994 Taxable Years
applying the method for writing off uncollectible reinsurance recoverables
agreed to during the 1987 through 1989 Tax audit as set forth in Schedule 5(f)
hereto, whether such incremental deductions or the benefits arising from the
utilization thereof are secured or realized by the Company and its Subsidiaries
during the 1990 through 1994 Taxable Years or in subsequent Taxable Years.

     "Overdue Rate" -- the prime rate of interest as reported in the "Money
      ------------                                                         
Rates" column of the Wall Street Journal (or the generally prevailing "prime
rate" as charged by major New York banks, if a prime rate is not so published in
the Wall Street Journal) on the first business day of the month for which
interest is computed.

     "Parent Federal Tax Settlement Payment Schedule" -- as defined in Section
      ----------------------------------------------                          
3(d)(ii) of this Agreement.

     "Post-1996 Straddle Period" -- the portion of a Straddle Period beginning
      -------------------------                                               
on January 1, 1997.

     "Post-Closing Taxable Year" -- a Taxable Year that begins after the Closing
      -------------------------                                                 
Date.

     "Pre-1997 Straddle Period" -- the portion of a Straddle Period ending on
      ------------------------                                               
and including December 31, 1996.

     "Pre-Closing Taxable Year" -- a Taxable Year that begins before the Closing
      ------------------------                                                  
Date.

                                       3
<PAGE>
 
     "Pro Forma Adjustments" --  (i) the "additional deduction" allowable under
      ---------------------                                                    
Section 847(1) of the Code; (ii) the amount includable in gross income under
Section 847(5) of the Code; (iii) any income, deduction, gain, or loss
attributable to (1) the transfer to or from the Company (or any of its
Subsidiaries) of the Crostex/Camfex Leases and Crostex/Camfex Purchase Money
Documents pursuant to Section 6.11 of the Purchase Agreement; (2) any deferred
intercompany transaction (as determined under Reg. (S)(S) 1.1502-13 and -13T)
occurring on or prior to Closing that is recognized as a result of the sale of
Company stock under the Purchase Agreement, or (3) any excess loss account under
Reg. (S) 1.1502-19 that is recognized as a result of the sale of Company stock
under the Purchase Agreement; (iv) any employee compensation that Seller is
required to pay under the Purchase Agreement; and (v) for the Taxable Year
beginning on January 1, 1997, an amount of deductions equal to the excess of (1)
the amount of "losses incurred" determined under section 832(b)(5) of the Code
as of the end of such Taxable Year for the Company and its Subsidiaries over (2)
the amount of "losses incurred" determined under section 832(b)(5) of the Code
as of the end of such Taxable Year for the Company and its Subsidiaries without
regard to losses in the amounts, and according to the lines of business and
accident years, shown on Schedule 3(c) hereto.

     "Pro Forma Subsidiaries Consolidated Return" -- as defined in Section
      ------------------------------------------                          
5(f)(ii)(C) hereof.

     "Purchase Agreement" -- as defined in Paragraph A of the Preamble to this
      ------------------                                                      
Agreement.

     "Reg. (S)" -- a provision of the Regulations promulgated under the Code.
      --------                                                               

     "Reinsurance Deduction" -- as defined in Section 2(c)(iii) hereof.
      ---------------------                                            

     "SAP Financial Statements" -- as defined in the Purchase Agreement.
      ------------------------                                          

     "Schedule" -- as defined in Section 5(f)(ii)(B) hereof.
      --------                                              

     "Straddle Period" -- any Taxable Year of Company or of any of its
      ---------------                                                 
Subsidiaries that begins on or before, and ends after, December 31, 1996.
 
     "Subsidiary" -- as defined in the Purchase Agreement.
      ----------                                          

     "Stub Period" -- the Taxable Year of Company and its Subsidiaries beginning
      -----------                                                               
on January 1, 1997 and ending on and including the Closing Date.

     "Tax" -- all taxes, charges, fees, and levies based upon gross income,
      ---                                                                  
gross receipts, premiums, profits, sales, use, value added, transfer, employment
or payroll, including, without limitation, any ad valorem, environmental,
excise, license, occupation, property, severance, stamp, withholding, or
windfall profit tax, any custom duty or other tax, and any Income Tax, 

                                       4
<PAGE>
 
together with any interest credit or charge, penalty, addition to tax or
additional amount imposed by any Taxing Authority.

     "Tax Return" -- with respect to any corporation or group of corporations,
      ----------                                                              
all reports, estimates, extension requests, information statements and returns
(other than Information Returns) relating to, or required to be filed in
connection with, any payment of any Tax.

     "Taxable Year" -- with respect to any  Tax of any corporation, or any group
      ------------                                                              
of corporations filing a consolidated, combined or unitary return for federal,
state, local or foreign  Tax purposes, the period for which the  Tax is
computed.

     "Taxing Authority" -- the Internal Revenue Service and any other domestic
      ----------------                                                        
or foreign governmental authority responsible for the administration of any Tax.

     "Xerox Affiliated Group" -- Xerox Corporation and each corporation (an
      -----------------------                                              
includable corporation) that joins with Parent in filing a consolidated federal
Income Tax Return for the applicable Taxable Year.

     "Xerox Group" -- the Xerox Affiliated Group and every other corporation
      -----------                                                           
that is, at any time after the Closing Date, a direct or indirect Subsidiary of
any member of the Xerox Affiliated Group.

     2.   Filing of Tax Returns; Payment of Taxes.
          --------------------------------------- 

          (a)  Filing of Tax Returns; Copies of Tax Returns.
               --------------------------------------------

               (i) Federal Income Tax Returns. Parent shall cause to be prepared
                   --------------------------
and filed on a timely basis a consolidated federal Income Tax Return for the
Xerox Affiliated Group for the 1996 and 1997 Taxable Years and shall include
therein the income, gain, loss, deduction, expense and credits of Company and
its Subsidiaries, which items shall be determined, unless otherwise agreed by
the parties, on the basis of an interim closing of the books for the portion of
the 1997 Taxable Year during which the Company and its Subsidiaries were members
of the Xerox Affiliated Group. The amount of the discount under Section 846 of
the Code with respect to the unpaid losses, loss adjustment expenses, and
salvage and subrogation of Company and its Subsidiaries, as of the Closing Date,
shall be determined for the Stub Period according to the interpolation
methodology set forth in Schedule 2(a) hereto and by allocating such unpaid
losses, loss adjustment expenses, and salvage and subrogation to the lines of
business and accident years in accordance with a Seller report provided to Buyer
no later than 30 days prior to the filing of the Tax Return to which such report
relates. In determining the amounts and information included in such report,
Seller shall apply actuarial methods and assumptions which are consistent with
those applied by the Insurance Subsidiaries to estimate their liability for loss
and

                                       5
<PAGE>
 
loss adjustment expenses net of retrocessional recoveries and salvage and
subrogation as of December 31, 1996 in the SAP Financial Statements, taking into
account the loss experience and operations of the Insurance Subsidiaries through
the Closing Date.

               (ii)  Tax Returns Other Than Federal Income Tax Returns. Company
                     -------------------------------------------------
shall prepare and, subject to Section 2(d)(ii) hereof, shall file (or caused to
be filed) on a timely basis all federal, state, local, and foreign Tax Returns
that (A) include Company or any

of its Subsidiaries, or all of them, for all Pre-Closing Taxable Years but (B)
exclude all other members of the Xerox Group.

               (iii) Parent Review of Tax Returns Prior to Filing. At least
                     --------------------------------------------
fifteen (15) business days before each due date for the filing of Tax Returns
required to be filed in respect of the Company or its Subsidiaries, or any of
them, pursuant to Section 2(a)(ii) hereof, Company shall provide Parent a
schedule listing all Tax Returns due as of such date (showing for each such Tax
Return the taxpayer, type of Tax, the Taxing Authority, the total amount of Tax
shown on the Tax Return, and the amount of Tax due or overpaid). The Company
shall, within three (3) business days after Parent's request, provide to Parent
a copy of any listed Tax Return. Within ten (10) business days after each due
date for the filing of any Tax Return required to be filed pursuant to Section
2(a)(ii) hereof, Company shall provide to Parent a statement signed by Company's
Chief Financial Officer affirming that, except as otherwise disclosed in detail
in such affirmation statement -- (A) all Tax Returns required to be filed as of
such date were included on the respective schedule of Tax Returns provided to
Parent pursuant to this Section 2(a)(iii), (B) each Tax Return copy provided to
Parent is an exact copy of the Tax Return as filed with the Taxing Authority,
and (C) each Tax Return for which no copy was provided to Parent reported the
same amounts of total Tax and Tax due or overpaid as shown on the schedule for
such Tax Return.

          (b)  Extensions Taken Into Account.  For purposes of this Section 2,
               -----------------------------                                  
any Tax Return shall be considered to have been filed on a timely basis if it is
filed on or before the due date for such filing, and the due date for filing any
Tax Return shall take into account all valid extensions.

          (c)  Filing Information; Closing of Taxable Years.
               ------------------

               (i) Filing Information. Pursuant to Section 9(a)(i) hereof,
                   ------------------
Company shall (and shall cause its Subsidiaries, or any of them, to) submit to
Parent in a timely fashion in accordance with past practice all filing
information necessary for the preparation and filing of the Income Tax Returns
that are the responsibility of Parent pursuant to Section 2(a)(i) hereof,
provided that the filing information for the federal Income Tax Returns referred
to in Section 2(a)(i) hereof shall be submitted to Parent no later than July 15,
1998 for Taxable Years that begin on or after January 1, 1997.

                                       6
<PAGE>
 
               (ii)  Closing of Taxable Years. Unless prohibited by applicable
                     ------------------------    
law, for state, local and foreign Income Tax purposes, the Taxable Year of
Company and those of its Subsidiaries that (A) are members of the Xerox
Affiliated Group or (B) are included in any state, local or foreign
consolidated, combined or unitary Income Tax Return with one or more members of
the Xerox Affiliated Group shall end on and include the Closing Date, and
Company and its Subsidiaries shall begin a new Taxable Year on the day after the
Closing Date. All Tax Returns referred to in Section 2(a) hereof shall be
prepared and filed consistent with this Section 2(c)(ii).

               (iii) Reinsurance Expense.  The parties recognize that the
                     -------------------                                 
reinsurance premium paid pursuant to section 6.17(f) of the Purchase Agreement
is an expense that is properly allocable to the post-closing Tax period, and the
parties intend that such expense be treated consistently for Tax purposes.  To
that end Buyer agrees that the deduction for such expense (the "Reinsurance
Deduction") shall be claimed by the Company and its Subsidiaries in the Taxable
Year that immediately follows the Closing, and Seller and Company agree that no
such deduction shall be claimed in a Pre-Closing Taxable Year.

          (d)  Consistent Preparation.
               ---------------------- 

               (i)  Preparation of Tax Returns. Company shall prepare (or cause
                    --------------------------
to be prepared) all Tax Returns required to be prepared pursuant to Section
2(a)(ii) hereof and all information required to be submitted to Parent pursuant
to Section 2(c)(i) hereof, using the methods used in reporting items of income,
gain, loss, deduction, expense and credit of Company and its Subsidiaries, as
reflected on Tax Returns filed prior to the date hereof, taking into account any
adjustments resulting from any audit or other examination of such Tax Returns
and applicable law.

               (ii) Disputes Over Treatment of Items.  In the event that Parent
                    --------------------------------                           
disputes any item shown on any Tax Return prepared (or caused to be prepared) by
Company pursuant to Section 2(a)(ii) hereof, neither Company nor any of its
Subsidiaries shall file such Tax Return except as in accordance with the
provisions of this Section 2(d)(ii).  If Parent and Company are unable to
resolve such dispute between themselves no later than ten (10) business days
before the due date of such Tax Return, then they shall jointly retain an
Independent Accounting Firm to resolve such dispute, and they shall each take
all reasonable and appropriate steps necessary to assist the Independent
Accounting Firm in resolving such dispute prior to such due date; provided,
however, that the filing of such Tax Return shall not be delayed beyond its due
date.  If  for any reason such dispute is not resolved by the Tax Return due
date, the Tax Return shall be filed as though the Parent prevailed in the
dispute and shall be amended, if necessary, after the dispute is resolved by the
Independent Accounting Firm.  Notwithstanding anything to the contrary in the
provisions of Section 5(e) hereof, Company shall be entitled to 

                                       7
<PAGE>
 
retain, to the extent provided for by the Independent Accounting Firm in its
resolution decree with respect to such dispute, a refund of Taxes arising out of
the filing of an amended Tax Return associated with such dispute resolution. The
fees of the Independent Accounting Firm shall be borne equally by the parties.
The resolution of the Independent Accounting Firm under this Section 2(d)(ii)
shall be binding on both Parent and Company.

     3.   Payment of Taxes and Federal Tax Settlement Payment.
          --------------------------------------------------- 

          (a)  Payment of Taxes.
               ---------------- 

               (i)  Parent shall pay (or cause to be paid) to the appropriate
Taxing Authority all Income Taxes shown to be due and payable on Income Tax
Returns that it is responsible for filing pursuant to Section 2(a)(i).

               (ii) Company shall pay (or cause to be paid) to the appropriate
Taxing Authority all Taxes shown to be due on all state, local, foreign and
other federal Tax Returns that it is responsible for filing pursuant to Section
2(a)(ii) hereof.

          (b)  Liability for Federal Tax Settlement Payment.  A Federal Tax
               --------------------------------------------                
settlement payment shall be computed and made for the Stub Period (the "Federal
Tax Settlement Payment") in accordance with the terms of this Agreement.  There
shall be no Tax settlement payments during and attributable to the 1996 Taxable
Year and the Stub Period other than the Federal Tax Settlement Payment
determined under this Agreement and any Tax settlement payments made prior to
the date of this Agreement;  provided, however, that if a Tax settlement payment
must be made prior to the Closing Date under another agreement between the
Company or any of its Subsidiaries, on the one hand, and Seller or any of its
Subsidiaries (other than the Company and its Subsidiaries), on the other hand,
then the required payment shall be made under such other agreement.  Appropriate
credit shall be given in making Federal Tax Settlement Payment hereunder for any
Tax settlement payments, under any agreement other than this Agreement, made
prior to the Closing Date relating to either the 1996 Taxable Year or the Stub
Period (including repayments of any prior Tax settlement payments for the 1996
Taxable Year or the Stub Period in excess of the required Federal Tax Settlement
Payments hereunder).

          (c)  Amount of the Federal Tax Settlement Payment.
               --------------------------------------------

               (i)  Company Pro Forma Taxable Income or Loss.  For purposes of
                    ----------------------------------------                  
determining the amount of the Federal Tax Settlement Payment due under Section
3(b) for the Stub Period, the income or loss of Company and its Subsidiaries
shall be adjusted by excluding therefrom the Pro Forma Adjustments and shall be
determined on a pro forma basis as if Company and its eligible Subsidiaries
filed a consolidated federal Income Tax Return separate from the Xerox
Affiliated Group ("Company Pro Forma Taxable Income or Loss").

                                       8
<PAGE>
 
               (ii) Amount of Federal Tax Settlement Payment.
                    ---------------------------------------- 

                    (A) Where the calculation of either Company Pro Forma
Taxable Income or Loss or Company Pro Forma Alternative Minimum Taxable Income
or Loss results in income for Company and its Subsidiaries for a Taxable Year,
Company shall make a Federal Tax Settlement Payment to Parent, in accordance
with Section 3(e), which is equal to the greater of (I) the amount determined by
multiplying Company Pro Forma Taxable Income or Loss for such Taxable Year (if
greater than zero) by the maximum corporate Income Tax rate applicable under the
Code for such Taxable Year to ordinary income and capital gain, as the case may
be, and (II) the amount determined by multiplying Company Pro Forma Alternative
Minimum Taxable Income or Loss for such Taxable Year (if greater than zero) by
the maximum alternative minimum Tax rate applicable under the Code for such
Taxable Year.

                    (B) Where the calculation of both Company Pro Forma Taxable
Income or Loss and Company Pro Forma Alternative Minimum Taxable Income or Loss
result in losses for Company and its Subsidiaries for a Taxable Year, Parent
shall make a Federal Tax Settlement Payment to Company, in accordance with
Section 3(e), equal to the Tax benefit actually realized by the Xerox Affiliated
Group from such loss. Such Tax benefit shall be calculated as the difference in
Tax liability resulting when such loss is included in the calculation of the
Xerox Affiliated Group Tax liability for the Taxable Year and excluded from the
calculation of the Xerox Affiliated Group Tax liability for the Taxable Year.

                    (C) Where the conditions of Section 3(c)(ii)(A) are
satisfied for the Taxable Year that begins on January 1, 1997, the amount of the
Company's Federal Tax Settlement Payment shall be reduced by an amount equal to
35% of the Pro Forma Adjustments Item (v) and the Company shall make such
reduced payment to Parent in accordance with Section 3(e); provided, however,
that if, as a result of such reduction, the Federal Tax Settlement Payment
becomes a negative, the Parent shall make a Federal Tax Settlement Payment to
the Company in accordance with Section 3(e) equal to the absolute value of such
negative amount. Where the conditions of Section 3(c)(ii)(B) are satisfied for
the Taxable Year that begins on January 1, 1997, the amount of the Parent's
Federal Tax Settlement Payment shall be increased by an amount equal to 35% of
the Pro Forma Adjustments Item (v) and the Parent shall make such increased
payment to the Company in accordance with Section 3(e).

          (d)  Federal Tax Settlement Payment Reporting
               ----------------------------------------

               (i)  Company Federal Tax Payment Schedule. Not later than sixty
                    ------------------------------------
(60) days after the Closing Date, Company shall deliver to Parent a schedule
showing the amount of Company Pro Forma Taxable Income or Loss and the amount of
Company Pro Forma Alternative Minimum Taxable Income or Loss for the Stub Period
and, if either amount is

                                       9
<PAGE>
 
positive, the Federal Tax Settlement Payment for the Stub Period. Such schedule
(a "Company Federal Tax Settlement Payment Schedule") shall be based on the Tax
Return filing information provided pursuant to Section 2(c)(i) (to the extent
available) and shall include all supporting workpapers and a brief explanation
of the basis on which Company Pro Forma Taxable Income or Loss and Company Pro
Forma Alternative Minimum Taxable Income or Loss were computed. Except as
otherwise expressly provided in this Agreement, the amount of Company Pro Forma
Taxable Income or Loss and Company Pro Forma

Alternative Minimum Taxable Income or Loss shall be determined, for all purposes
of this Agreement, in conformity with the information provided in Section
2(c)(i) hereof.

               (ii)  Parent Federal Tax Settlement Payment Schedule. Within
                     ----------------------------------------------  
thirty (30) days after Parent receives a Company Federal Tax Settlement Payment
Schedule for a Taxable Year that reflects losses in the computations of both
Company Pro Forma Taxable Income or Loss and Company Pro Forma Alternative
Minimum Taxable Income or Loss, Parent shall deliver to Company a revised
schedule (a "Parent Federal Tax Settlement Payment Schedule") showing the amount
of the Federal Tax Settlement Payment for the Taxable Year, taking into account
any Tax benefit actually realized by the Xerox Affiliated Group from such
losses.

               (iii) Preliminary and Final Federal Tax Settlement Payment
                     ----------------------------------------------------
Schedules.
- ---------

                     (A) To the extent that any Federal Tax Settlement Payment
cannot be determined with finality due to a lack of information and/or the fact
that the Xerox Affiliated Group's consolidated federal Income Tax Return will
not have been filed, Company or Parent, as the case may be, shall estimate the
amount of the Federal Tax Settlement Payment as nearly as possible and shall
timely deliver either the Company Federal Tax Settlement Payment Schedule or the
Parent Federal Tax Settlement Payment Schedule, as the case may be, indicating
the amount of the Federal Tax Settlement Payment estimated in accordance with
this Section 3(d)(iii)(A). In the case of a Company estimate, Company shall
cause its independent public accountant to confirm to the Parent that each such
Company Federal Tax Settlement Payment Schedule provides a reasonable estimate
of the amount of Company Pro Forma Taxable Income or Loss and the amount of
Company Pro Forma Alternative Minimum Taxable Income or Loss for the applicable
Taxable Year determined in conformity with Section 2(c) hereof. In the case of a
Parent estimate, Parent shall cause its independent public accountant to confirm
to Buyer that each such Parent Federal Tax Settlement Payment Schedule provides
a reasonable estimate of the Federal Tax Settlement Payment.

                     (B) If a Company Federal Tax Settlement Payment Schedule
provided in accordance with Section 3(d)(i) is based on an estimate, the Company
shall prepare and provide a final schedule (a "Final Company Federal Tax
Settlement Payment Schedule") no later than July 15, 1998. If a Parent Federal
Tax Settlement Payment Schedule provided in

                                       10
<PAGE>
 
accordance with Section 3(d)(ii) is based on an estimate, the Parent shall
prepare and provide a final schedule (a "Final Parent Federal Tax Settlement
Payment Schedule") no later than October 15, 1998.

               (iv) Disputes. Within fifteen (15) days after receiving a Company
                    --------
Federal Tax Settlement Payment Schedule or a Final Company Federal Tax
Settlement Payment Schedule, Parent will notify Company of any disagreement with
any element of Company Pro Forma Taxable Income or Loss or Company Pro Forma
Alternative Minimum Taxable Income or Loss, or both, reflected therein. Within
fifteen (15) days after receiving a Parent Federal Tax Settlement Payment
Schedule or a Final Parent Federal Tax Settlement Payment Schedule, Company will
notify Parent of any disagreement with the Tax benefit calculation reflected
thereon. Company and Parent will promptly attempt to resolve any such
disagreement. If Company and Parent are unable to resolve any such disagreement
within forty-five (45) days after receipt of such notice, then the issues
remaining unresolved with respect to the amount of Company Pro Forma Taxable
Income or Loss or Company Pro Forma Alternative Minimum Taxable Income or Loss,
or both, or with respect to the Parent Federal Tax Settlement Payment Schedule
or a Final Parent Federal Tax Settlement Payment Schedule, or both, shall be
resolved as follows:

                    (A) Company and Parent shall jointly retain an Independent
Accounting Firm and, within fifteen (15) days following retention of the
Independent Accounting Firm, Company and Parent shall present or cause to be
presented to the Independent Accounting Firm the issue or issues that must be
resolved.

                    (B) Company and Parent shall encourage the Independent
Accounting Firm to render its decision as soon as is reasonably practicable,
including, without limitation, prompt compliance with all reasonable requests by
the Independent Accounting Firm for information, papers, books, records and the
like. All decisions of the Independent Accounting Firm with respect to the
issues presented by the parties shall be final and binding on the parties
hereto.

                    (C) The fees of such Independent Accounting Firm shall be
borne equally by the parties.

                    (D) Within thirty (30) days after a disputed Federal Tax
Settlement Payment is agreed to by Company and Parent or determined by the
Independent Accounting Firm, Company or Parent, as the case may be, shall pay to
Parent or Company, as the case may be, the amount of the Federal Tax Settlement
Payment for the Taxable Year less any Federal Tax Settlement Payment amount
previously paid in respect of such Taxable Year.

                                       11
<PAGE>
 
          (e) Timing of Federal Tax Settlement Payments.
              ----------------------------------------- 

              (i)   Payment by Company. Any Federal Tax Settlement Payment due
                    ------------------
from Company to Parent shall be due and payable to Parent as of the date the
Company Federal Tax Settlement Payment Schedule or the Final Company Federal Tax
Settlement Payment Schedule, as the case may be, is required to be delivered to
the Parent in accordance with this Agreement, except to the extent that a
dispute with respect to any such Company Federal Tax Settlement Payment Schedule
or such Final Company Federal Tax Settlement Payment Schedule has occurred and
is continuing under Section 3(d)(iv) hereof. If such a dispute has occurred,
then the Federal Tax Settlement Payment shall become payable as provided in
Section 3(d)(iv)(D) hereof.

              (ii)  Payment by Parent. Any Federal Tax Settlement Payment due
                    ----------------- 
from Parent to Company shall be due to Company as of the date the Parent Federal
Tax Settlement Payment Schedule or the Final Parent Federal Tax Settlement
Payment Schedule, as the case may be, is required to be delivered to Company in
accordance with this Agreement, except to the extent that a dispute with respect
to any such Parent Federal Tax Settlement Payment Schedule or such Final Parent
Federal Tax Settlement Payment Schedule has occurred and is continuing under
Section 3(d)(iv) hereof. If such a dispute has occurred, then the Federal Tax
Settlement Payment shall become payable as provided in Section 3(d)(iv)(D)
hereof.

              (iii) Interest on Additional Federal Tax Settlement Payments.  Any
                    ------------------------------------------------------      
additional Federal Tax Settlement Payment arising from adjustments shown on a
Company Federal Tax Settlement Payment Schedule, a Final Company Federal Tax
Settlement Payment Schedule, a Parent Federal Tax Settlement Payment Schedule,
or a Final Parent Federal Tax Settlement Payment Schedule, as the case may be,
including adjustments arising from any dispute, shall include interest from the
due date of the Company Federal Tax Settlement Payment Schedule as provided in
Section 3(d)(i) hereof, or the due date of the Parent Federal Tax Settlement
Payment Schedule as provided in Section 3(d)(ii), as the case may be, computed
at the Overdue Rate.

     4.   Information Returns.
          ------------------- 

          (a) Preparation of Information Returns.  Parent shall prepare and file
              ----------------------------------                                
(or cause to be prepared and filed) all Information Returns which are required
under applicable law to be filed by Parent or Seller in respect of the Company
and its Subsidiaries, provided, however, that Company shall provide to Parent
                      --------  -------                                      
any and all information necessary or useful for the filing of such Information
Returns in an accurate and timely manner.  Company shall prepare and file (or
cause to be prepared and filed), in a manner consistent with the prior practices
of Company and its Subsidiaries, as applicable, all Information Returns required
to be filed by Company and its Subsidiaries, or any of them for any period
ending before or including the Closing Date.

                                       12
<PAGE>
 
          (b)  Extensions Taken Into Account.  For purposes of this Section 4,
               -----------------------------                                  
any Information Return shall be considered to have been filed on a timely basis
if it is filed on or before the due date for such filing, and the due date for
filing any Information Return shall take into account all valid extensions.

          (c)  Payment of Charges and Fees; Indemnification.  Any party required
               --------------------------------------------                     
to file any Information Return pursuant to this Section 4 shall pay any related
fees or charges (including any such fees or charges that shall thereafter become
due and payable with respect to such Information Returns due to a Final
Determination) and shall indemnify and hold the other party harmless against any
related interest and penalties, as well as any such fees or charges which are
assessed against such party as the result of a failure by the party responsible
for such filing to file any Information Return in a timely and accurate manner.

     5.   Indemnification Relating to Taxes; Payment of Refunds; Other Payments.
          --------------------------------------------------------------------- 

          (a)  Indemnification by Parent.  Parent shall indemnify Buyer against,
               -------------------------                                        
and hold it harmless (on an after-Tax basis) from:

               (i)  all liability for Taxes with respect to Company and its
Subsidiaries  assessed after the Closing Date for all Pre-Closing Taxable Years
ending on or before December 31, 1996 and any Pre-1997 Straddle Period, except

                    (A)  to the extent of an amount equal to the Taxes accrued
as a current liability in the GAAP Financial Statements as of December 31, 1996
of the Company and its Subsidiaries (1) as reduced by an amount equal to any
federal Income Taxes accrued in such financial statements up to the amount of
any Federal Tax Settlement Payments that the Company ultimately is required to
make in respect of the 1996 Taxable Year pursuant to Section 3(c)(ii)(A), and
(2) as reduced by an amount equal to all Taxes other than federal Income Taxes
accrued in such financial statements up to the amount of any Tax payments made
with originally filed non-federal Tax Returns filed with respect to the 1996
Taxable year pursuant to Section 3(a)(ii);

                    (B)  to the extent that any such Tax is attributable to an
adjustment that results in an increase in the taxable income of Company or its
Subsidiaries for any Pre-Closing Taxable Years ending on or before December 31,
1996 or any Pre-1997 Straddle Period and a related decrease in the taxable
income of Company or its Subsidiaries in a Post-Closing Taxable Year beginning
on or after January 1, 1997 or any Post-1996 Straddle Period; and

                                       13
<PAGE>
 
               (ii) all liability for Taxes of any other member of the Xerox
Affiliated Group pursuant to any provision of joint and several liability
including, without limitation, Reg (S) 1.1502-6 and any corresponding provisions
of state, local or foreign law.

          Notwithstanding anything in the foregoing that might otherwise be read
to the contrary, it is hereby understood and agreed that Parent shall have no
liability to indemnify Buyer against, or hold it harmless from:  any Federal Tax
Settlement Payment the Company is required to make to Parent pursuant to Section
3(c)(ii)(A), or any Tax the Company is required to pay (or cause to be paid)
pursuant to Section 3(a)(ii) hereof.

          (b)  Obligation of the Buyer and Company to Indemnify.  Buyer and
               ------------------------------------------------            
Company shall indemnify (on an after Tax basis) the Parent and Seller against
all liability for Taxes with respect to Company and its Subsidiaries for which
the Parent is not required to indemnify the Buyer pursuant to Section 5(a)
hereof.

          (c)  Tax Obligations for Straddle Periods.  Taxes relating to the
               ------------------------------------                        
Company and its Subsidiaries for any Straddle Period shall be the joint
responsibility of Buyer and Company, on the one hand, and Parent and Seller, on
the other hand, and shall be apportioned (based on an interim closing of the
books) between the Pre-1997 Straddle Period and the Post-1996 Straddle Period in
a fair and equitable manner consistent with past accounting practices as
properly adjusted to reflect applicable Tax principles, or in the case of real,
personal, and intangible property taxes or any similar Tax, in accordance with
the principles of Section 164(d) of the Code.

          (d)  Notice and Payment of Indemnified Amounts.
               ----------------------------------------- 

               (i)    Duty to Notify. Buyer shall notify Parent of any Taxes 
                      --------------     
paid or incurred by Buyer, Company or its Subsidiaries which are subject to
indemnification by Parent under Section 5(a) hereof. Parent shall notify Buyer
of any Taxes paid or incurred by Parent or any other member of the Xerox Group
which are subject to indemnification by Buyer and Company under Section 5(b)
hereof.

               (ii)   Explanation of Claim.  Any notice contemplated by this 
                      --------------------     
Section 5(d) shall include a detailed calculation (including, if applicable,
separate allocations of such Taxes between Pre-1997 and Post-1996 Straddle
Periods and supporting work papers) and a brief explanation of the basis for
such indemnification.

               (iii)  Time for Payment.  Within twenty (20) days after the 
                      ----------------   
receipt of a notice described in this Section 5(d), the notified party shall pay
to the notifying party the amount requested in such notice, but only to the
extent that the notified party agrees with such request. To the extent that the
notified party disagrees with such request, it shall, within the

                                       14
<PAGE>
 
applicable twenty (20) day period, so notify the notifying party. If the parties
are unable to settle such disagreement between themselves no later than fifteen
(15) days after notice of the disagreement in accordance with this Section 5(d),
then they shall jointly retain an Independent Accounting Firm to resolve such
dispute. The fees of the Independent Accounting Firm shall be borne equally by
the parties. The resolution of the Independent Accounting Firm under this
Section 5(d)(iii) shall be binding on Parent on the one hand and Buyer and
Company on the other hand. Within thirty (30) days after resolution of such
dispute, Buyer or Company on the one hand or Parent on the other hand, as the
case may be, shall pay to Parent on the one hand, or Buyer or Company on the
other hand, as the case may be, the amount determined by such Independent
Accounting Firm to be due pursuant to this Section 5 (d) together with interest
at the Overdue Rate from the date the payment was originally due.

          (e)  Parent's Right to Pursue and Retain Refunds.  Parent and Seller
               -------------------------------------------                    
shall have the right to pursue and shall be entitled to retain, or to receive
prompt payment from Buyer, Company or its Subsidiaries to the extent secured by
any of them, any overpayment, refund or credit of Taxes (including, without
limitation, refunds and credits arising by reason of Tax Returns as originally
filed or amended Tax Returns) relating to Company and its Subsidiaries for any
and all Pre-Closing Taxable Years ending on or before December 31, 1996 or any
Pre-1997 Straddle Period, including without limitation any refunds in respect of
the 1990 through 1994 Uncollectible Reinsurance Deductions. If Buyer (or any of
its Subsidiaries) or Parent (or any of its Subsidiaries) receives a Tax refund
to which the other party is entitled pursuant to this Agreement, the Buyer or
Parent, as the case may be, shall pay or cause the recipient to pay the amount
of such refund (including any interest received thereon) to such other party
within ten (10) days after receipt thereof. Within ninety (90) days after the
end of each Taxable Year following the Closing Date, Buyer shall have its Chief
Financial Officer tender to Parent a statement showing the aggregate amount of
all Tax refunds received to which Parent (or any of its Subsidiaries) is
entitled.

          (f)  Other Payments.
               -------------- 

               (i)  Uncollectible Reinsurance Deductions. Any Tax benefit 
                    ------------------------------------  
realized by the Company Group (or any member thereof) for any Post-Closing
Taxable Year with respect to the 1990 through 1994 Uncollectible Reinsurance
Deductions shall be paid to the Parent in accordance with the terms hereof
whether such Tax benefit results from (i) an originally filed or amended Tax
Return of the Company Group (or any member thereof), (ii) an audit or other
examination of, or claim for refund or amended Tax Return with respect to, any
Tax Return of (or including) any member of the Xerox Group for any Pre-Closing
Taxable Year or Pre-1997 Straddle Period, or (iii) otherwise. A deduction or
deductions for the 1990 through 1994 Uncollectible Reinsurance Deductions not
allowed as deductions for any Pre-Closing Taxable Year or Pre-1997 Straddle
Period shall be claimed by the Company and its Subsidiaries in the federal
Income Tax Return(s) for the first Taxable Year(s) in which such deduction(s)
become allowable to Company or its Subsidiaries, and within twenty (20) days
after the filing of a Tax

                                       15
<PAGE>
 
Return in which such deductions are claimed, Buyer shall pay (or cause to be
paid) to Parent an amount equal to the Tax benefit attributable to such
deductions. For purposes of this provision, the amount of such Tax benefit shall
be equal to the excess of the amount of the federal Income Tax liability of the
Company Group (or any member thereof, as the case may be) for all Taxable Years
affected computed without regard to the 1990 through 1994 Uncollectible
Reinsurance Deductions over the amount of the actual federal Income Tax
liability of the Company Group (or any member thereof, as the case may be) for
all Taxable Years affected after considering the 1990 through 1994 Uncollectible
Reinsurance Deductions. If the deductions claimed pursuant to this paragraph are
subsequently disallowed pursuant to a Final Determination, Parent shall pay to
Buyer the amounts previously paid hereunder with respect to such disallowance
(with interest at the Overdue Rate from the original date of payment until the
date repaid to Buyer).

               (ii) Special Payments.
                    ---------------- 

                    (A)  At Closing, Seller shall make a payment of $13,200,000
to the Company.

                    (B)  Within 30 (thirty) business days after the filing of
the consolidated federal Income Tax Return by the Xerox Affiliated Group for the
1997 Taxable Year that includes the Stub Period, Seller shall provide Buyer with
a schedule (the "Schedule") that sets forth the portion of the consolidated
alternative minimum tax credit of the Xerox Affiliated Group allocated to the
Company and its Subsidiaries upon Closing (the "Allocated AMT Credit"). Within
twenty (20) business days after the receipt of the Schedule, Buyer shall pay to
Seller an amount equal to the Allocated AMT Credit shown in the Schedule.

                    (C)  Buyer shall pay to Seller an amount not to exceed the
excess of (1) $10,200,000 over (2) amounts paid to Seller pursuant to Section
5(f)(ii)(B) hereof (the "Additional Consideration") based on the Reinsurance
Deduction, as follows: Buyer shall pay to Seller 50 percent of the Tax benefit
of the deduction for the Reinsurance Deduction by the Insurance Subsidiaries in
excess of $22,500,000, calculated as if (1) the Insurance Subsidiaries file a
consolidated federal Income Tax Return as an "affiliated group" (as that term is
defined in Section 1504(a)(1) of the Code) (the "Pro Forma Subsidiaries
Consolidated Return") and (2) the deduction for the Reinsurance Deduction is
claimed on the Pro Forma Subsidiaries Consolidated Return in accordance with
Section 2(c)(iii) hereof. For purposes of this provision, the Insurance
Subsidiaries will be considered to receive a federal Income Tax benefit as a
result of the deduction of the Reinsurance Deduction as and when the
consolidated federal Income Tax liability that would be shown on the Pro Forma
Subsidiaries Consolidated Return for any Taxable

                                       16
<PAGE>
 
Year calculated without the deduction for the Reinsurance Deduction exceeds the
consolidated federal Income Tax liability that would be shown on the Pro Forma
Subsidiaries Consolidated Return for the same Taxable Year calculated with the
deduction for the Reinsurance Deduction in accordance with Section 2(c)(iii)
hereof.

                         Any amount payable by Buyer under the preceding
paragraph shall be paid within twenty (20) business days after the filing of any
consolidated federal Income Tax Return that includes the Insurance Subsidiaries
for the Taxable Year in which the Insurance Subsidiaries would be considered
under this provision to receive a federal Income Tax benefit as a result of the
deduction of the Reinsurance Deduction in accordance with Section 2(c)(iii)
hereof. Amounts paid pursuant to this provision shall be subject to subsequent
adjustment as the parties may agree.

                         Buyer agrees to provide Seller with an annual schedule
showing the calculation of the Pro Forma Subsidiaries Consolidated Return
showing the availability of payments under this provision (on a "with and
without" basis pursuant to this provision). Such schedule, which shall be
reviewed and confirmed as accurate by Buyer's independent public accountants,
shall be due within twenty (20) business days after the filing each year of the
consolidated federal Income Tax Return that includes the Insurance Subsidiaries.

     6.   Capital Loss, Net Operating Loss, and Credit Carrybacks.
          ------------------------------------------------------- 

          (a)  Payments With Respect to Refund Claims.
               -------------------------------------- 

               (i)  Filing of Claim for Refund; Payment of Tax Benefit. If 
                    -------------------------------------------------- 
Company or any of its Subsidiaries realizes a capital loss or a credit in a 
Post-Closing Taxable Year that is required, after application of paragraph (b),
below, to be carried back to a Taxable Year of the Xerox Affiliated Group (or
any member thereof), Parent shall promptly file (or shall cause promptly to be
filed) a claim for refund and shall pay (or cause to be paid) to Company the
full amount of any Tax benefit, net of any Tax due by the Xerox Affiliated Group
on account of such refund, within twenty (20) days of the date such Tax benefit
is realized. For purposes of this Section 6(a), the Tax benefit in any Taxable
Year shall be equal to the excess of (A) the Tax liability of the Xerox
Affiliated Group for such Taxable Year, computed without regard to the capital
loss or credit referred to above, over (B) the actual Tax liability of the Xerox
Affiliated Group for such Taxable Year after considering such capital loss or
credit.

               (ii) Repayment of Tax Benefit.  If Parent has paid an amount in
                    ------------------------                                  
respect of any refund pursuant to Section 6(a)(i) hereof, that amount shall be
repaid to Parent (with 

                                       17
<PAGE>
 
interest at the Overdue Rate from the original date of payment until the date
repaid to Parent) within twenty (20) days after demand therefor by Parent (A) to
the extent that the Xerox Affiliated Group subsequently realizes capital losses,
credits, or net operating losses that could have been carried back but for the
carryback of capital losses or credits of the Company Group (or its members)
pursuant to this Section 6(a) or (B) to the extent that the Tax benefit to the
Xerox Affiliated Group is subsequently reduced pursuant to a Final
Determination.

          (b)  Election to Forgo Carrybacks of Losses, Etc.  Company and its
               -------------------------------------------                  
Subsidiaries shall elect, where permitted by law, to carry forward any net
operating loss, net capital loss, credit or other item arising after the Closing
Date that would, absent such election, be carried back to a Pre-Closing Taxable
Year of Company or any of its Subsidiaries that file a consolidated, combined,
or unitary Tax Return with any member of the Xerox Affiliated Group. If the
Xerox Affiliated Group has a consolidated net operating loss or consolidated net
capital loss for either the 1996 Taxable Year or 1997 Taxable Year, or both,
then Xerox Corporation may elect, pursuant to Reg. (S) 1.1502-20(g), to
reattribute to itself all or any portion of the net operating loss attributable
to the Company and/or its Subsidiaries, as determined under Reg. (S) 1.1502-
79A(a)(3) for the 1996 Taxable Year and Reg. (S) 1.1502-21T(b)(2)(iv) for the
1997 Taxable Year, and all or any portion of the net capital loss attributable
to the Company, as determined under Reg. (S) 1.1502-79A(b)(2) for the 1996
Taxable Year and Reg. (S) 1.1502-22T(b)(3) for the 1997 Taxable Year, and Buyer,
Company and its Subsidiaries will execute the documents necessary for the Parent
to so elect.

     7.   Payments.
          -------- 

          (a)  Time and Manner of Payments.  All payments made pursuant to
               ---------------------------                                
Sections 3, 4, 5 or 6 hereof shall be made in immediately available funds.
Except as otherwise provided herein, any payment not made when due hereunder
shall bear interest at the Overdue Rate from the due date until the date of
actual payment.  In the absence of a specified date, a payment shall be due
twenty (20) days after the later of (i) the date on which the notifying party
actually realizes the expense, by incurring an economic detriment, with respect
to which such notice relates, or (ii) the date such notice is delivered.

          (b)  Nature of Payments.  Any payment owing to the Buyer pursuant to
               ------------------                                             
this Agreement shall be made to Company and (other than interest on a payment)
treated by all parties for all purposes as a payment to the Buyer made as a
reduction of purchase price for Company's stock followed by a contribution to
Company's capital by the Buyer.  Any payment owing to the Parent (or any member
of the Xerox Group) shall be made to Parent and (other than interest on a
payment) treated by all parties for all purposes as a net adjustment to the
purchase price for Company's stock.  Any liability or obligation with respect to
such payment shall be extinguished through payment to Company or Parent
respectively.

                                       18
<PAGE>
 
          (c)  Deferral of Payments Until Closing. Notwithstanding anything else
               ----------------------------------    
to the contrary in this Agreement, any payment otherwise due hereunder prior to
the Closing Date shall become payable within thirty (30) days after the Closing
Date, and any such deferred payments shall bear interest at the Overdue Rate
from the date such payments would have been due under this Agreement absent the
provisions of this Section 7(c) through the date of actual payment.

     8.   Audits and Other Contests.
          ------------------------- 

          (a)  Notice of Audits or Assessments.  Buyer (and any member of the
               -------------------------------                               
Company Group) shall promptly notify Parent, and Parent shall promptly notify
Buyer, in writing within ten (10) business days from the receipt of notice of
any pending or threatened Tax audits or assessments of Company or its
Subsidiaries for any Pre-Closing Taxable Year.

          (b)  Federal Income Taxes.
               -------------------- 

               (i)   Parent shall have the sole right to represent the interests
of Company and its Subsidiaries, and to employ counsel of its choice at its
expense, in any audit or other examination or administrative or court proceeding
relating to federal Income Taxes for any Pre-Closing Taxable Year, provided that
                                                                   -------- ----
Parent shall keep Buyer reasonably informed on an ongoing basis with respect to
issues affecting the Company and its Subsidiaries. Subject to Parent's rights
set forth in the preceding sentence, Buyer shall be entitled, at its expense, to
participate in the conduct of any Tax audit or any judicial or administrative
proceeding relating to any Tax audit described in the first sentence of this
Section 8(b).

               (ii)  Parent shall be entitled to settle any issue relating to
Taxes in connection with the contests described in this Section 8(b), provided
that Parent shall not settle any such issue or take any action that shall give
rise to an increase in Taxes (or a decrease in Tax benefit) for any Post-Closing
Taxable Year without informing Buyer, before finalization of such settlement or
action. It is hereby understood and agreed that any settlement with respect to
the 1990 through 1994 Uncollectible Reinsurance Deductions shall not be treated
as giving rise to an increase in Taxes (or a decrease in a Tax benefit) for any
Post-Closing Taxable Year.

               (iii) If Buyer disagrees with any proposed settlement about which
Parent has informed Buyer in accordance with the preceding paragraph and
proposes a basis for a different settlement, Parent shall nevertheless be
entitled to settle the issue unless Buyer provides to Parent (1) an opinion from
a "Big Six" accounting firm that the issue has a material ongoing effect and (2)
an opinion of counsel from a law firm of national stature agreed upon by Parent
and Buyer stating that it is more likely than not that Buyer's proposed
settlement would be sustained upon a Final Determination, in which event Parent
may pay Buyer an amount equal to the excess of the Taxes attributable to the
settlement proposed by the Parent over the Taxes attributable to the settlement
proposed by Buyer, and therefore be free to settle such issues in its sole
discretion.

                                       19
<PAGE>
 
          (c)  Other Taxes.  Parent shall have the sole right to represent the
               -----------                                                    
interests of Company and its Subsidiaries and settle all issues, and to employ
counsel of its choice at its expense, in any audit or administrative or court
proceeding relating to Taxes other than federal Income Taxes for any Pre-Closing
Taxable Year ending on or before December 31, 1996.  Notwithstanding the
foregoing and subject to Parent's rights set forth in the preceding sentence,
Buyer shall be entitled, at its expense, to participate in the conduct of any
Tax audit and any judicial or administrative proceeding relating to any Tax
audit described in this Section 8(c).

          (d)  Straddle Periods.  All audits or administrative or court
               ----------------                                        
proceedings relating to any Straddle Period shall be controlled jointly by
Parent and Buyer, each to employ counsel of its choice at its expense, provided,
however, that settlement (at the administrative level or during the course of
judicial proceedings) may only be entered into with the consents of both Parent
and Buyer.  In the event of an issue arising pursuant to any contest referred to
in this Sections 8(d), if Parent or Buyer proposes to settle on terms acceptable
to a Taxing Authority, but the other party, Parent or Buyer as the case may be,
disagrees with the proposed settlement, then the party proposing to settle may
pay the other party its share of the amount of Taxes attributable to the
settlement proposed and, in that event, the other party shall have sole
responsibility for the settlement of such issue.

     9.   Cooperation, Record Retention, and Confidentiality.
          -------------------------------------------------- 

          (a)  Cooperation.
               ----------- 

               (i)   Buyer, Company and Subsidiaries to Cooperate. Upon Parent's
                     --------------------------------------------
request, Buyer shall promptly provide (and cause Company and its Subsidiaries,
and the other members of the Company Group to promptly provide) Parent with such
cooperation and assistance, documents and other information, without charge, as
Seller may reasonably request in connection with (A) the preparation of any Tax
Return or Information Return, (B) the conduct of any audit or other examination
or any judicial or administrative or court proceeding referred to in Section 8
hereof relating to liability for, refunds of or adjustments with respect to (or
any other matter relating to) Taxes or Tax Returns or Information Returns of the
Xerox Group or any member of such Group, or (C) the verification of an amount
payable or receivable hereunder.

               (ii)  Parent and Seller to Cooperate. Likewise, upon Buyer's 
                     ------------------------------ 
request, Seller shall promptly provide (and cause its Subsidiaries to promptly
provide) such cooperation and assistance, documents and other information
referred to in the preceding sentence, as Buyer may reasonably request in the
circumstances described in Section 9(a)(i) hereof.

               (iii) Cooperation Defined.  For purposes of this Agreement,
                     -------------------                                  
cooperation and assistance shall include, without limitation: (A) providing all
relevant 

                                       20
<PAGE>
 
information that is available to Buyer, Company and its Subsidiaries, as the
case may be, with respect to any audit or proceeding referred to in Section 8(a)
hereof; (B) executing and delivering any power of attorney necessary or other
documents or instruments to carry out the intent of this Agreement; (C) promptly
and timely filing appropriate claims for any refund; preparation of responses to
requests for information within the time frame given by the Taxing Authority for
responding to such requests for information, and (D) making available to any
party, during normal business hours (1) all books, records, returns of Company
and its Subsidiaries, relevant extracts from revenue agent reports that are
applicable to Company and its Subsidiaries, and (2) the services of officers and
employees (without substantial interruption of employment), necessary or
useful in connection with the matters referred to in this Section 9(a), provided
that the foregoing shall be done in a manner so as not to interfere unreasonably
with the conduct of the business of Buyer and Company and its Subsidiaries.

          (b)  Record Retention.
               ---------------- 

               (i)   Records to Be Retained; Time Periods. Parent, Seller, 
                     ------------------------------------  
and Buyer shall each retain or cause to be retained all Tax Returns and
Information Returns and all books, records, schedules, workpapers, and other
documents relating thereto, including, without limitation, documents described
in the Record Retention Agreement (a copy of which is attached as Exhibit A),
until the expiration of the later of (A) all applicable statutes of limitations
(taking into account any waivers or extensions thereof), and (B) any retention
period required by law or pursuant to any record retention agreement with any
Taxing Authority.

               (ii)  Prior Notices Required. Parent and Buyer shall notify each 
                     ----------------------   
other in writing of (A) any waivers, extension or expirations of applicable
statutes of limitations as referred to in Section 9(b)(i) hereof, and (B) of any
intended destruction, at least thirty (30) days prior thereto, of any of the
documents referred to in Section 9(b)(i) hereof. A party giving such a notice
under this Section 9(b)(ii) shall nonetheless refrain from disposing of any of
the materials referred to in Section 9(b)(i) hereof without first having offered
to transfer possession thereof to the notified party.

          (c)  Confidentiality.  Except as required by law or with the prior
               ---------------                                              
express written consent of all other parties to this Agreement, all Tax Returns
and Information Returns, documents, schedules, workpapers and other documents
relating thereto, as well as all information contained therein, shall be kept
confidential to the parties to this Agreement and their officers, employees,
agents and representatives, shall not be disclosed to any other Person, and
shall be used only for the purposes provided herein.

                                       21
<PAGE>
 
     10.  Subsequent Transferees.  Except as provided in this Section 10,
          ----------------------                                         
Buyer shall not sell, transfer, assign, or otherwise dispose of, whether
directly or indirectly, either the stock of Company and/or its Subsidiaries or
substantially all of Buyer's assets, or both, and Buyer shall prevent Company
and its Subsidiaries (determined as of the Closing Date) from selling,
transferring, assigning, or otherwise disposing of all or substantially all of
their assets, unless the purchaser, transferee, or assignee thereof expressly
assumes all of the obligations of the transferor under this Agreement or unless
prior to any such transfer, the transferor has made such other provisions for
the satisfaction of its obligations under this Agreement as shall be agreed to
by the other parties to this Agreement in their reasonable discretion.  Provided
that the terms of this Section 10 are complied with, any transferee of all or
substantially all of the stock of Company shall succeed to its transferor's
rights under this Agreement.

     11.  Miscellaneous.
          ------------- 

          (a)  Effectiveness.  This Agreement shall be effective from and after
               -------------                                                   
the date hereof, provided, however, that this Agreement shall terminate
immediately upon a termination of the Purchase Agreement in accordance with its
terms and thereafter this Agreement shall be of no further force and effect.

          (b)  Entire Agreement.  This Agreement and the Purchase Agreement
               ----------------                                            
contain the entire agreement among the parties hereto with respect to the
subject matter hereof.

          (c)  Binding Effect; No Third Party Beneficiary.  This Agreement shall
               ------------------------------------------                       
be binding upon and inure to the benefit of the parties and their respective
successors, legal representatives and permitted assigns.  Nothing expressed or
implied in this Agreement is intended or shall be construed to confer upon or
give any Person other than the Parent, Seller, Company, or the Buyer any rights
or remedies or by reason of this Agreement or any transaction contemplated
hereby.

          (d)  Termination of Prior Agreements.  With respect to Company and its
               -------------------------------                                  
Subsidiaries, this Agreement terminates, as of the Closing Date, any and all
other agreements with respect to Taxes (other than the Purchase Agreement) to
which Company or any of its Subsidiaries, on the one hand, and Seller or any of
its Subsidiaries (other than Company and its Subsidiaries), on the other hand,
are or were parties at any time at or before the Closing Date.  This Agreement
also extinguishes, as of the Closing Date, any and all intercompany liabilities
with respect to Taxes between Company or any of its Subsidiaries, on the one
hand, and Seller or any of its Subsidiaries (other than Company and its
Subsidiaries), on the other hand, that exist on the Closing Date.  Subject to
the provisions of Section 3(b) hereof, the parties to this Agreement intend (i)
that there not be any payments by Parent or Seller to Company or any of its
Subsidiaries after the date of this Agreement under any existing agreement with
respect to Taxes 

                                       22
<PAGE>
 
(other than the Purchase Agreement) and (ii) that payments with respect to Taxes
hereafter be pursuant only to this Agreement.

          (e)  No Double Recovery. Should it be necessary, equitable adjustments
               ------------------  
will be made to  prevent duplicate recovery for indemnification with respect to
the same item.

          (f)  Section 338(h)(10) Election.  The parties hereto shall not make a
               ---------------------------                                      
joint election under Section 338(h)(10) of the Code unless Buyer and Seller
agree otherwise.

          (g)  Guarantee of Performance.  Parent, Buyer and Company hereby
               ------------------------                                   
guarantee the complete and prompt performance by the members of the Xerox
Affiliated Group and the Company Group, respectively, of all of their
obligations and undertakings pursuant to this Agreement.

          (h)  Severability. In case any one or more of the provisions contained
               ------------     
in this Agreement should be invalid, illegal or unenforceable, the
enforceability of the remaining provisions hereof shall not in any way be
affected or impaired thereby.

          (i)  Indulgences, etc.  Neither the failure nor any delay on the part
               -----------------                                               
of any party hereto to exercise any right under this Agreement shall operate as
a waiver thereof, nor shall any single or partial exercise of any right preclude
any other further exercise of the same or any other right, nor shall any waiver
of any right with respect to any occurrence be construed as a waiver of such
right with respect to any other occurrence.

          (j)  Governing Law.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED
               -------------                                                    
IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
THE CONFLICT OF LAW PRINCIPLES THEREOF, EXCEPT WITH RESPECT TO MATTERS OF LAW
CONCERNING THE INTERNAL CORPORATE AFFAIRS OF ANY CORPORATE ENTITY WHICH IS A
PARTY TO OR SUBJECT OF THIS AGREEMENT, AND AS TO THOSE MATTERS THE LAW OF THE
JURISDICTION UNDER WHICH THE RESPECTIVE ENTITY DERIVES ITS POWERS SHALL GOVERN.

          (k)  Notices.  All notices, requests, demands and other communications
               -------                                                          
required or permitted under this Agreement to be made to the Buyer or Company
shall be made in the manner provided in Section 10.5 of the Purchase Agreement.
All notices, requests, demands and other communications required or permitted
under the Agreement to be made to the Parent or Seller shall be made to:

                                       23
<PAGE>
 
               To Parent:     
                                                                                
               Xerox Financial Services, Inc. 
               100 First Stamford Place 
               Stamford, Connecticut 06904    
               Facsimile:  (203) 325-6729     
               Attn:  Mark Sheivachman        
               Vice President, Taxes          
                                              
               To Seller:                     
                                              
               Talegen Holdings, Inc.         
               1011 Western Avenue            
               Suite 1000                     
               Seattle, Washington 98104      
               Facsimile:  (206) 654-2631     
               Attn:  Richard N. Frasch, Esq. 
               General Counsel                
                                                                                
               With copies to:                               
                                                                                
               LeBoeuf, Lamb, Greene & MacRae, L.L.P.                           
               1875 Connecticut Avenue, N.W.                                    
               Washington, D.C. 20009-5728                                      
               Facsimile:  (202) 986-8102                                       
               Attn:  George R. Abramowitz                                      
                                                                                
               To Buyer:                                                        
                                                                                
               ACE Limited                                                      
               The ACE Building                                                 
               30 Woodbourne Avenue                                             
               Hamilton, HM 08 Bermuda                                          
               Facsimile:  (441) 292-8620                                       
               Attn:  Christopher Z. Marshall                

                            24
<PAGE>
 
               With copies to:                                             
                                                            
               Mayer, Brown & Platt                              
               190 S. LaSalle Street                             
               Chicago, Illinois  60603                          
               Facsimile:  (312) 701-7711                        
               Attn:  James R. Barry                              

with a copy to the appropriate persons designated in Section 11.5 of the
Purchase Agreement for receiving notice on behalf of Parent and Seller.

          (l)  Waivers and Amendments; Non-Contractual Remedies; Preservation of
               -----------------------------------------------------------------
Remedies.  This Agreement may be amended, superseded, canceled, renewed or
- --------                                                                  
extended, and the terms hereof may be waived, only by a written instrument
executed and delivered by duly authorized officers of Buyer and Parent, or, in
the case of waiver, by the party waiving compliance.  No delay on the part of
any party in exercising any right, power or privilege hereunder shall operate as
a waiver thereof, nor shall any waiver on the part of any party of any such
right, power or privilege nor any single or partial exercise of any such right,
power or privilege, preclude any further exercise thereof or the exercise of any
such right, power or privilege.  The rights and remedies herein provided are
cumulative and are not exclusive of any rights or remedies that any party may
otherwise have at law or in equity.  The rights and remedies of any party based
upon, arising out of or otherwise in respect of any inaccuracy in or breach of
any covenant contained in this Agreement shall in no way be limited by the fact
that the act, omission, occurrence or other state of facts upon which any claim
of any such inaccuracy or breach is based may also be the subject matter of any
other representation, warranty, covenant or agreement contained in this
Agreement (or in any other agreement between the parties) as to which there is
no inaccuracy or breach.

          (m)  Survival of Obligations.  The agreements, covenants and
               -----------------------                                
obligations contained in this Agreement shall survive the consummation of the
transactions contemplated by the Purchase Agreement, and shall expire only when
claims arising therefrom are barred by all applicable statutes of limitation (as
may be extended from time to time).

          (n)  Variations in Number and Gender.  All terms used in this
               -------------------------------                         
Agreement, and any variations of such terms, refer to the masculine, feminine or
neuter, singular or plural, as the context may require.

          (o)  Counterparts.  This Agreement may be executed in any number of
               ------------                                                  
counterparts, each such counterpart being deemed to be an original instrument,
and all of such counterparts shall together constitute one and the same
instrument.

                                      25
<PAGE>
 
          (p)  Headings. The Section and paragraph captions herein are for
               --------                                                   
convenience or reference only, do not constitute part of this Agreement and
shall not be deemed to limit or otherwise affect any of the provisions hereof.

          (q)  Delayed Closing.  This Agreement has been drafted on the
               ---------------                                         
assumption that Closing will occur in 1997.  The parties hereto recognize that
there may be circumstances which cause the Closing to occur in 1998.  If Closing
is in fact delayed until 1998, the parties hereto intend that, on a basis
consistent with the spirit of this Agreement and, subject to the following
sentence:  (1) the provisions included in this Agreement with respect to the
Stub Period shall be applied to the Taxable Year of the Company and its
subsidiaries that begins on January 1, 1998 and ends on the Closing Date; (2)
the provisions included in this Agreement with respect to the Straddle Period
shall be interpreted as applying to the period that begins before, and ends
after, December 31, 1997; and (3) the Company's 1997 Taxable Year shall be
subject as nearly as practicable to the provisions herein that apply to the Stub
Period.  Notwithstanding anything to the contrary in the preceding sentence, it
is understood that (1) the provisions of Section 3(c)(ii)(C) shall only be
applicable to the Taxable Year that begins on January 1, 1997, and (2) the
provisions of paragraphs (a), (b), (c) and (d) of Section 5 hereof shall be
unchanged by any delay in the Closing Date to 1998.

                                      26
<PAGE>
 
     IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by
the duly authorized officers of the parties hereto on the date first hereinabove
written.

     Xerox Financial Services, Inc.



     By:___________________________


     Talegen Holdings, Inc.



     By:___________________________


     Westchester Specialty Group, Inc.



     By:___________________________


     ACE Limited



     By:___________________________

                                      27
<PAGE>
 
                                   Exhibit A

                          RECORD RETENTION AGREEMENT
                          --------------------------

                                      28
<PAGE>
 
                                 Schedule 2(a)

           INTERPOLATION METHODOLOGY PURSUANT TO SECTION 2(a)(1)(B)
           --------------------------------------------------------

For purposes of this Agreement, any discounting of unpaid losses (within the
meaning of Section 846 of the Code) and of salvage and subrogation required for
the Stub Period shall be done in accordance with the following interpolation
method:

          The discount factor for AY + 0 shall be determined (with reference to
          the development of losses for the portion of 1997 up to and including
          the Closing Date) by adding to the industry discount factor (published
          by the IRS for 1997) for AY + 0, a percentage of the excess (whether
          positive or negative) of the industry factor for AY + 0 over the
          industry factor for AY + 1 equal to the number of full months in 1997
          following the Closing Date divided by 12, provided that the resulting
          discount factor shall not be greater than one nor less than zero.

          The discount factor for AY + 1 shall be determined by subtracting from
          the industry discount factor for AY + 0, a percentage of the excess
          (whether positive or negative) of the industry factor for AY + 0 over
          the industry factor AY + 1 equal to 1 minus the percentage determined
          pursuant to the preceding sentence.

          Similar interpolative adjustments should be made for AY + 2, AY + 3,
          and each succeeding accident year, in turn, with the resulting factors
          applied to unpaid losses reflected in the books and records of the
          Company for each accident year.

It is understood and agreed that the source of the above method of computing
discount factors for unpaid losses is the letter submitted by the American
Insurance Association on April 24, 1989 to the Internal Revenue Service, and
that the method of computing part year discount factors for unpaid losses
reflected in that letter is intended to be applied for purposes of this
Agreement.

                                      29
<PAGE>
 
                                 Schedule 3(c)
                          WESTCHESTER SPECIALTY GROUP
         1997 RESERVE ACTIONS -- BY LINE OF BUSINESS AND ACCIDENT YEAR

<TABLE>
<CAPTION>
                                                            Westchester
Other Liability                                Combined        Fire         WSLIC
- ---------------                                ----------      ----         -----
<S>                                           <C>           <C>           <C>
1987 & Prior                                   68,312,000    59,077,000     9,235,000
1988                                            2,107,000     1,004,000     1,103,000
1989                                            3,441,000     1,866,000     1,575,000
1990                                            4,581,000     2,493,000     2,088,000
1991                                            6,446,000     2,793,000     3,653,000
1992                                            6,670,000     2,641,000     4,029,000
1993                                           21,387,000    19,969,000     1,418,000
1994                                           22,657,000    21,158,000     1,499,000
1995                                           16,558,000    16,558,000             0
1996                                           12,040,000    12,040,000             0
                                              -----------   -----------    ----------
Subtotal                                      164,199,000   139,599,000    24,600,000
                                              ===========   ===========    ==========
 
Uncollectible Reinsurance Reserves:*
- ------------------------------------
1987 & Prior                                   30,000,000    30,000,000             0
1988                                            1,000,000       500,000       500,000
1989                                            1,750,000       750,000     1,000,000
1990                                            1,750,000       750,000     1,000,000
1991                                            2,750,000     1,750,000     1,000,000
1992                                            1,750,000       750,000     1,000,000
1993                                              750,000       250,000       500,000
1994                                              750,000       750,000             0
1995                                              750,000       750,000             0
1996                                              750,000       750,000             0
                                              -----------   -----------    ----------
Subtotal                                       42,000,000    37,000,000     5,000,000
                                              ===========   ===========    ==========
 
Special Property:
- -----------------
1992                                              (28,000)      (28,000)            0
1993                                             (205,000)      (95,000)     (110,000)
1994                                           (4,343,000)   (1,653,000)   (2,690,000)
1995                                           (1,791,000)   (l,750,000)      (41,000)
1996                                           (6,832,000)   (6,673,000)    (159, 000)
                                              -----------   -----------    ----------
Subtotal                                      (13,199,000)  (10,199,000)   (3,000,000)
                                              ===========   ===========    ==========
 
Workers Comp.
- -------------
1987 & Prior                                      100,000       500,000      (400,000)
</TABLE>

__________________________________

     *    Reserve additions for accident years through 1993 will be discounted
          using the 1997 discount factor applicable to the Other Liability line
          of business for the 1997 accident year. Reserve additions for the 1994
          through 1996 accident years will actually appear as loss reserves
          under the Other Liability line of business for those accident years on
          Schedule P of the Annual Statement.

                                      30
<PAGE>
 
<TABLE> 
<CAPTION> 
CMP
- ---
<S>                                <C>           <C>            <C>   
1987 & Prior                           (90,000)      (90,000)            0   
1990                                    26,000        26,000             0   
1991                                   120,000       120,000             0   
1992                                   332,000       332,000             0   
1993                                   510,000       510,000             0   
1994                                 1,743,000     1,743,000             0   
1995                                 2,993,000     2,993,000             0   
1996                                 2,867,000     2,867,000             0   
                                   -----------   -----------    ----------   
Subtotal                             8,501,000     8,501,000             0   
                                   ===========   ===========    ==========   
                                                                             
Auto                                                                         
- ----                                                                         
1991                                  (966,000)     (966,000)            0   
1992                                  (604,000)     (604,000)            0   
                                   -----------   -----------    ----------   
                                                                             
GRAND TOTAL                        200,031,000   173,831,000    26,200,000   
- -----------                        ===========   ===========    ==========   
</TABLE>

                                      31
<PAGE>
 
                                 Schedule 5(f)

            1990 through 1994 Uncollectible Reinsurance Deductions
            ------------------------------------------------------

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                              INCOME/(DEDUCTION)
                              ------------------
- --------------------------------------------------------------------------------
COMPANY           1990        1991        1992         1993     1994   TOTAL 
- --------------------------------------------------------------------------------
<S>            <C>          <C>       <C>          <C>         <C>  <C>      
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Westchester    -4,135,320   297,972   -8,057,076   11,153,927    0  -740,497 
- --------------------------------------------------------------------------------
WSLIC                0         0            0         -74,400    0   -74,400 
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
TOTAL          -4,135,320   297,972   -8,057,076   11,079,527    0  -814,897 
- --------------------------------------------------------------------------------
</TABLE>

                                      32
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                                        -----------------------------------
- -CENTRAL SECRETARIAL CONTROL SHEET-                                                       JOB #:
- ---------------------------------------------------------------------------------------------------------------------------
                                              PLEASE COMPLETE THIS FORM IN ENTIRETY.
                          WRITE OUT ALL SPECIAL INSTRUCTIONS TO ASSURE THAT YOUR WORK WILL BE COMPLETED.
- ---------------------------------------------------------------------------------------------------------------------------

<S>                                                    <C>                                <C>           
ATTORNEY:HUSAIN                                        ATTORNEY #:1515                    EXT.:  8093
- ---------------------------------------------------------------------------------------------------------------------------

CLIENT:TALEGEN                                         CLIENT #:  19350                   FLOOR:
- ----------------------------------------------------------------------------------------===================================

MATTER:TAX PLANNING                                    MATTER #:  769                            OVERTIME
- ----------------------------------------------------------------------------------------
DOCUMENT TITLE: WESTCHESTER TAX AGREEMENT                                                      [_] Yes  [_] No
===========================================================================================================================
DATE/TIME DUE:                                                                            RETURN INSTRUCTIONS
========================================================================================
SPECIAL INSTRUCTIONS:                                                                      [_] 15-Minute Pickup  
                                                                                                                 
                                                                                           [_] Call when Ready   
                                                                                                                 
                                                                                           [_] Page when Ready   
                                                                                                                 
                                                                                           [_] Interoffice (after 

                                                                                          4:45P)
===========================================================================================================================
                                              WORD PROCESSING / SECRETARIAL SERVICES
- ---------------------------------------------------------------------------------------------------------------------------
TREATMENT                                              PROOFREADING SERVICES
                                                       PROOFREADING
[_] Input/Scan                                         [_]  Full Read (Word-for-word proofing of all text)
[_] Revise                                                  [_]  Verbatim (Keep errors that appear in 
                                                                 original)
[_] Copy to New File Name and Revise                   [_]  Cold Read (Read through for sense - no 
[_] Create New Version                                      master)
    under Same File Name and Revise                    [_]  Revisions and Slugs (Full read riders)                          

                                                       BLACKLINING
[_] Proofread Only                                     [_]  Pencil Changes (Caret and score all
[_] Print Only                                              deletions/additions)
[_] Tape Transcription                                 [_]  Composite (Caret and score all differences
                                                            from two or more masters)
                                                       [_]  Print-to-Print (Full read final against master 
                                                            and mark all differences on final)
- --------------------------------------------------------------------------------------------------------------------------- 
                              COMPARERITE

    Additions                           Deletions                              List Versions:
    ---------                           ---------                              -------------
    [_] Bold/Double Underline           [_] Strikethrough
    [_] Shade                           [_] Caret                              [_] Latest Two Versions
    [_] Other                           [_] Caret/Score
                                        [_] Deletions at End                   Old Version  _______________
_________________                                      
                                        [_] Other _______________
(Choose one from each                                                          New Version ________________
column)  

=========================                                                    ==============================================   
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 
===============================================================================================================
TIME CLOCKED IN                         TIME CLOCKED OUT
<S>                                     <C>                      
                                        I [_]   H [_]    Left Message with 
- ---------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------
SYSTEM FILE NAME:             Word Processing Operators          N.B.
                    -------------------------------------------- 
       DC3 16956.3                                               [_] Return to Spvr. when done 
                      Originated:YMARCUS -- 9/12/97 at 3:48pm                                          
                    -------------------------------------------- [_] See Spvr. for special 
                      Modified:YMARCUS -- 9/12/97 at 3:59pm          instructions
- ---------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>
 
                                                                   EXHIBIT 10.30
 
                                                             EXECUTION COPY



                                  $200,000,000

                                    364-DAY
                               CREDIT AGREEMENT

                                  dated as of

                               December 11, 1997

                                     among

                                 ACE Limited,
                                 as Borrower,

                        A.C.E. Insurance Company, Ltd.,
                 Corporate Officers & Directors Assurance Ltd.
                                      and
                     Tempest Reinsurance Company Limited,
                                as Guarantors,

                            The Banks Listed Herein

                                      and

                  Morgan Guaranty Trust Company of New York,
                            as Administrative Agent

                                ______________

                          J.P. Morgan Securities Inc.
                                      and
                               Mellon Bank N.A.,
                             Co-Syndication Agents

                  Morgan Guaranty Trust Company of New York,
                              Documentation Agent

<PAGE>

                               TABLE OF CONTENTS

                                  ___________

<TABLE> 
<CAPTION> 
                                                                           PAGE 
                                                                           ----
<S>                                                                        <C> 

                                  ARTICLE 1                                
                                  DEFINATIONS                               

Section 1.01.  Definitions................................................. 1
Section 1.02.  Accounting Terms and Determinations......................... 11
Section 1.03.  Types of Borrowings......................................... 12
Section 1.04.  United States Dollars....................................... 12

                                   ARTICLE 2
                                  THE CREDITS

Section 2.01.  Commitments to Lend......................................... 12
Section 2.02.  Notice of Committed Borrowing............................... 13
Section 2.03.  Money Market Borrowings..................................... 13
Section 2.04.  Notice of Banks; Funding of Loans........................... 17
Section 2.05.  Notes....................................................... 18
Section 2.06.  Maturity of Loans........................................... 19
Section 2.07.  Interest Rates.............................................. 19
Section 2.08.  Facility Fee................................................ 21
Section 2.09.  Optional Termination or Reduction of Commitments............ 21
Section 2.10.  Scheduled Termination of Commitments........................ 21
Section 2.11.  Method of Electing Interest Rates........................... 21
Section 2.12.  Optional Prepayments........................................ 23
Section 2.13.  General Provisions as to Payments........................... 23
Section 2.14.  Funding Losses.............................................. 24
Section 2.15.  Computation of Interest and Fees............................ 25
Section 2.16.  Regulation D Compensation................................... 25

                                   ARTICLE 3
                                  CONDITIONS

Section 3.01.  Closing..................................................... 25
Section 3.02.  Borrowings.................................................. 27
</TABLE>

<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                           PAGE 
<S>                                                                        ----
                                                                           <C> 

                                   ARTICLE 4
                        REPRESENTATIONS AND WARRANTIES


Section 4.01.  Corporate Existence and Power............................... 27
Section 4.02.  Corporate and Governmental Authorization; No
     Contravention......................................................... 27
Section 4.03.  Binding Effect.............................................. 28
Section 4.04.  Financial Information....................................... 28
Section 4.05.  Litigation.................................................. 29
Section 4.06.  ERISA....................................................... 30
Section 4.07.  Taxes....................................................... 30
Section 4.08.  Not an Investment Company................................... 30
Section 4.09.  Full Disclosure............................................. 30
Section 4.10.  Compliance with Laws........................................ 30

                                   ARTICLE 5
                                   COVENANTS

Section 5.01.  Information................................................. 31
Section 5.02.  Payment of Obligations...................................... 33
Section 5.03.  Maintenance of Property; Insurance.......................... 33
Section 5.04.  Conduct of Business and Maintenance of Existence............ 33
Section 5.05.  Compliance with Laws........................................ 33
Section 5.06.  Inspection of Property, Book and Records.................... 34
Section 5.07.  Leverage.................................................... 34
Section 5.08.  Subsidiary Debt............................................. 34
Section 5.09.  Minimum Tangible Net Worth.................................. 34
Section 5.10.  Negative Pledge............................................. 35
Section 5.11.  Consolidations, Mergers and Sales of Assets................. 36
Section 5.12.  Use of Proceeds............................................. 36
Section 5.13.  ERISA....................................................... 36

                                   ARTICLE 6
                                   DEFAULTS

Section 6.01.  Events of Default........................................... 37
Section 6.02.  Notice of Default........................................... 40
</TABLE>

                                      ii

<PAGE>
 
<TABLE> 
<CAPTION>                                                                  
                                                                           PAGE
                                                                           ---- 
<S>                                                                        <C> 
                                   ARTICLE 7
                                  THE AGENTS


Section 7.01.  Appointment and Authorization............................... 40
Section 7.02.  Administrative Agent and Affiliates......................... 40
Section 7.03.  Action by Administrative Agent.............................. 40
Section 7.04.  Consultation with Experts................................... 40
Section 7.05.  Liability of Administrative Agent........................... 40
Section 7.06.  Indemnification............................................. 41
Section 7.07.  Credit Decision............................................. 41
Section 7.08.  Successor Administrative Agent.............................. 41
Section 7.09.  Administrative Agent's Fee.................................. 42
Section 7.10.  Other Agents................................................ 42

                                   ARTICLE 8
                            CHANGE IN CIRCUMSTANCES

Section 8.01.  Basis for Determination Interest Rate Inadequate or
     Unfair................................................................ 42
Section 8.02.  Illegality.................................................. 43
Section 8.03.  Increased Cost and Reduced Return........................... 43
Section 8.04.  Taxes....................................................... 45
Section 8.05.  Base Rate Loans Substituted for Affected Fixed Rate Loans... 47
Section 8.06.  Substitution of Bank........................................ 47

                                   ARTICLE 9
                                   GUARANTY

Section 9.01.  The Guaranty................................................ 48
Section 9.02.  Guaranty Unconditional...................................... 48
Section 9.03.  Discharge Only upon Payment in Full; Reinstatement in
     Certain Circumstances................................................. 49
Section 9.04.  Waiver by Each of the Guarantors............................ 49
Section 9.05.  Subrogation................................................. 50
Section 9.06.  Stay of Acceleration........................................ 50
Section 9.07.  Limit of Liability.......................................... 50
</TABLE>

                                     iii

<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                            PAGE
                                                                            ----
<S>                                                                         <C> 
          
                                  ARTICLE 10
                                 MISCELLANEOUS


Section 10.01.  Notices.................................................... 50
Section 10.02.  No Waivers................................................. 51
Section 10.03.  Expenses; Indemnification.................................. 51
Section 10.04.  Sharing; Set-Offs.......................................... 51
Section 10.05.  Amendments and Waivers..................................... 52
Section 10.06.  Successors and Assigns..................................... 53
Section 10.07.  Collateral................................................. 54
Section 10.08.  Governing Law.............................................. 54
Section 10.09.  Counterparts; Integration; Effectiveness................... 54
Section 10.10.  Judicial Proceedings....................................... 55
Section 10.11.  Judgment Currency.......................................... 56
Section 10.12.  WAIVER OF JURY TRIAL....................................... 57
Section 10.13.  Existing Credit Agreement.................................. 57
Section 10.14.  Confidentiality............................................ 57
 
EXHIBIT A      -    NOTE
EXHIBIT B      -    FORM OF MONEY MARKET QUOTE REQUEST
EXHIBIT C      -    FORM OF INVITATION FOR MONEY MARKET
                    QUOTES
EXHIBIT D      -    FORM OF MONEY MARKET QUOTE                
EXHIBIT E      -    FORM OF MAPLES AND CALDER OPINION        
EXHIBIT F      -    FORM OF CONYERS, DILL & PEARMAN OPINION  
EXHIBIT G      -    FORM OF MAYER, BROWN & PLATT OPINION     
EXHIBIT H      -    FORM OF DAVIS POLK & WARDWELL OPINION    
EXHIBIT I      -    ASSIGNMENT AND ASSUMPTION AGREEMENT      
EXHIBIT J      -    LETTER FROM CT CORPORATION SYSTEM         
</TABLE>

                                      iv
<PAGE>
 
                                    364-DAY
                               CREDIT AGREEMENT

     AGREEMENT dated as of December 11, 1997 among ACE LIMITED, A.C.E. INSURANCE
COMPANY, LTD., CORPORATE OFFICERS & DIRECTORS ASSURANCE LTD. and TEMPEST
REINSURANCE COMPANY LIMITED, the BANKS listed on the signature pages hereof and
MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as Administrative Agent.

     WHEREAS, the Borrower desires to replace the existing Credit Agreement
dated as of November 15, 1996 among the Borrower, certain of the Guarantors,
certain banks and Morgan Guaranty Trust Company of New York, as agent, by
entering into this Agreement; and

     WHEREAS,  the Banks agree to do so.

     NOW, THEREFORE, the parties hereto agree as follows:


                                   ARTICLE 1

                                  Definitions

     Section 1.01.  Definitions.  The following terms, as used herein, have the
following meanings:

     "ABSOLUTE RATE AUCTION" means a solicitation of Money Market Quotes setting
forth Money Market Absolute Rates pursuant to Section 2.03.

     "ACE INSURANCE" means A.C.E. Insurance Company, Ltd., a Bermuda limited
liability company, and its successors.

     "ACE US" means ACE US Holdings, Inc., a Delaware corporation, and its
successors.

     "ADMINISTRATIVE AGENT" means Morgan Guaranty Trust Company of New York in
its capacity as administrative agent for the Banks under the Financing
Documents, and its successors in such capacity.
<PAGE>
 
     "AGENT" means each of the Administrative Agent, the Documentation Agent,
the Syndication Agents, the Managing Agent and the Co-Agents, and "AGENTS" means
any combination of them, as the context may require.

     "ADMINISTRATIVE QUESTIONNAIRE" means, with respect to each Bank, an
administrative questionnaire in the form prepared by the Administrative Agent
and submitted to the Administrative Agent (with a copy to the Borrower) duly
completed by such Bank.

     "APPLICABLE LENDING OFFICE" means, with respect to any Bank, (i) in the
case of its Base Rate Loans, its Domestic Lending Office, (ii) in the case of
its Euro-Dollar Loans, its Euro-Dollar Lending Office and (iii) in the case of
its Money Market Loans, its Money Market Lending Office.

     "ASSIGNEE" has the meaning set forth in Section 10.06(c).

     "AUTHORIZED OFFICER" means any of (i) the Chairman, President and Chief
Executive Officer of the Borrower, (ii) the General Counsel and Secretary of the
Borrower, (iii) the President of ACE Insurance, (iv) the Chief Financial Officer
of the Borrower, (v) the Chief Investment Officer of the Borrower, (vi) the
Chairman of ACE UK Ltd., or (vii) any other Person designated in a notice given
to the Administrative Agent by any two of the foregoing Persons, and "AUTHORIZED
OFFICERS" means all of the foregoing Persons.

     "BANK" means each bank listed on the signature pages hereof, each Assignee
which becomes a Bank pursuant to Section 10.06(c), and their respective
successors.

     "BASE RATE" means, for any day, a rate per annum equal to the higher of (i)
the Prime Rate for such day and (ii) the sum of 1/2 of 1% plus the Federal Funds
Rate for such day.

     "BASE RATE LOAN" means a Committed Loan which bears interest at the Base
Rate pursuant to the applicable Notice of Committed Borrowing or Notice of
Interest Rate Election or the provisions of Section 2.11(a) or Article 8.

     "BERMUDA COMPANIES LAW" means The Companies Act 1981 of Bermuda, as
amended, and the regulations promulgated thereunder.

     "BERMUDA INSURANCE LAW" means The Insurance Act 1978 of Bermuda, as
amended, and the regulations promulgated thereunder.

                                       2
<PAGE>
 
     "BORROWER" means ACE Limited, a Cayman Islands company limited by shares,
and its successors.

     "BORROWING" has the meaning set forth in Section 1.03.

     "CO-AGENT" means each Bank designated as a Co-Agent on the signature pages
hereof, in its capacity as co-agent in respect of this Agreement.

     "CLOSING DATE" means the date on or after the Effective Date on which the
Administrative Agent shall have received the documents specified in or pursuant
to Section 3.01.

     "CODA" means Corporate Officers & Directors Assurance Ltd., a Bermuda
limited liability company, and its successors.

     "COMMITMENT" means, with respect to each Bank, the amount set forth
opposite the name of such Bank on the signature pages hereof, as such amount may
be reduced from time to time pursuant to Section 2.09.

     "COMMITTED LOAN" means a loan made by a Bank pursuant to Section 2.01;
provided that, if any such loan or loans (or portions thereof) are combined or
subdivided pursuant to a Notice of Interest Rate Election, the term "COMMITTED
LOAN" shall refer to the combined principal amount resulting from such
combination or to each of the separate principal amounts resulting from such
subdivision, as the case may be.

     "CONSOLIDATED DEBT" means at any date the Debt of the Borrower and its
Consolidated Subsidiaries, determined on a consolidated basis as of such date.

     "CONSOLIDATED NET INCOME" means, for any period, the net income of the
Borrower and its Consolidated Subsidiaries, determined on a consolidated basis
for such period.

     "CONSOLIDATED SUBSIDIARY" means at any date any Subsidiary or other entity
the accounts of which would be consolidated with those of the Borrower in its
consolidated financial statements if such statements were prepared as of such
date.

     "CONSOLIDATED TANGIBLE NET WORTH" means at any date the consolidated
stockholders' equity of the Borrower and its Consolidated Subsidiaries less
their consolidated Intangible Assets, all determined as of such date; provided
that such determination for purposes of Sections 5.07, 5.09 and 5.10 shall be
made without giving effect to adjustments pursuant to Statement No. 115 of the
Financial

                                       3
<PAGE>
 
Accounting Standards Board.  For purposes of this definition "INTANGIBLE ASSETS"
means the amount (to the extent reflected in determining such consolidated
stockholders' equity) of (i) all write-ups (other than write-ups resulting from
foreign currency translations and write-ups of assets of a going concern
business made within twelve months after the acquisition of such business)
subsequent to June 30, 1997 in the book value of any asset owned by the Borrower
or a Consolidated Subsidiary and (ii) all unamortized debt discount and expense,
unamortized deferred charges, deferred acquisition costs, goodwill, patents,
trademarks, service marks, trade names, anticipated future benefit of tax loss
carry-forwards, copyrights, organization or developmental expenses and other
intangible assets.

     "DEBT" of any Person means at any date, without duplication, (i) all
obligations of such Person for borrowed money, (ii) all obligations of such
Person evidenced by bonds, debentures, notes or other similar instruments, (iii)
all obligations of such Person to pay the deferred purchase price of property or
services, except trade accounts payable arising in the ordinary course of
business, (iv) all obligations of such Person as lessee which are capitalized in
accordance with generally accepted accounting principles, (v) all non-contingent
obligations (and, solely for purposes of Section 5.10 and the definitions of
Material Debt and Material Financial Obligations, all contingent obligations) of
such Person to reimburse any bank or other Person in respect of amounts paid
under a letter of credit or similar instrument, (vi) all Debt secured by a Lien
on any asset of such Person, whether or not such Debt is otherwise an obligation
of such Person, and (vii) all Debt of others Guaranteed by such Person, provided
that the term "DEBT" shall not include obligations of an insurance company under
insurance policies or surety bonds issued by it.

     "DEFAULT" means any condition or event which constitutes an Event of
Default or which with the giving of notice or lapse of time or both would,
unless cured or waived, become an Event of Default.

     "DERIVATIVES OBLIGATIONS" of any Person means all obligations of such
Person in respect of any rate swap transaction, basis swap, forward rate
transaction, commodity swap, commodity option, equity or equity index swap,
equity or equity index option, bond option, interest rate option, foreign
exchange transaction, cap transaction, floor transaction, collar transaction,
currency swap transaction, cross-currency rate swap transaction, currency option
or any other similar transaction (including any option with respect to any of
the foregoing transactions) or any combination of the foregoing transactions.

     "DOCUMENTATION AGENT" means Morgan Guaranty Trust Company of New York in
its capacity as documentation agent in respect of this Agreement.

                                       4
<PAGE>
 
     "DOMESTIC BUSINESS DAY" means any day except a Saturday, Sunday or other
day on which commercial banks in New York City are authorized by law to close.

     "DOMESTIC LENDING OFFICE" means, as to each Bank, its office located at its
address set forth in its Administrative Questionnaire (or identified in its
Administrative Questionnaire as its Domestic Lending Office) or such other
office as such Bank may hereafter designate as its Domestic Lending Office by
notice to the Borrower and the Administrative Agent.

     "EFFECTIVE DATE" means the date this Agreement becomes effective in
accordance with Section 10.09.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended, or any successor statute.

     "ERISA GROUP" means, with respect to any Person, such Person, any
Subsidiary of such Person and all members of a controlled group of corporations
and all trades or businesses (whether or not incorporated) under common control
which, together with such Person or any such Subsidiary, are treated as a single
employer under Section 414 of the Internal Revenue Code.

     "EURO-DOLLAR BUSINESS DAY" means any Domestic Business Day on which
commercial banks are open for international business (including dealings in
dollar deposits) in London.

     "EURO-DOLLAR LENDING OFFICE" means, as to each Bank, its office, branch or
affiliate located at its address set forth in its Administrative Questionnaire
(or identified in its Administrative Questionnaire as its Euro-Dollar Lending
Office) or such other office, branch or affiliate of such Bank as it may
hereafter designate as its Euro-Dollar Lending Office by notice to the Borrower
and the Administrative Agent.

     "EURO-DOLLAR LOAN" means a Committed Loan which bears interest at a Euro-
Dollar Rate pursuant to the applicable Notice of Committed Borrowing or Notice
of Interest Rate Election.

     "EURO-DOLLAR MARGIN" has the meaning set forth in Section 2.07(b).

     "EURO-DOLLAR RATE" means a rate of interest determined pursuant to Section
2.07(b) on the basis of a London Interbank Offered Rate.

                                       5
<PAGE>
 
     "EURO-DOLLAR RESERVE PERCENTAGE" means for any day that percentage
(expressed as a decimal) which is in effect on such day, as prescribed by the
Board of Governors of the Federal Reserve System (or any successor) for
determining the maximum reserve requirement for a member bank of the Federal
Reserve System in New York City with deposits exceeding five billion dollars in
respect of "EUROCURRENCY LIABILITIES" (or in respect of any other category of
liabilities which includes deposits by reference to which the interest rate on
Euro-Dollar Loans is determined or any category of extensions of credit or other
assets which includes loans by a non-United States office of any Bank to United
States residents).

     "EVENT OF DEFAULT" has the meaning set forth in Section 6.01.

     "FEDERAL FUNDS RATE" means, for any day, the rate per annum (rounded
upward, if necessary, to the nearest 1/100th of 1%) equal to the weighted
average of the rates on overnight Federal funds transactions with members of the
Federal Reserve System arranged by Federal funds brokers on such day, as
published by the Federal Reserve Bank of New York on the Domestic Business Day
next succeeding such day, provided that (i) if such day is not a Domestic
Business Day, the Federal Funds Rate for such day shall be such rate on such
transactions on the next preceding Domestic Business Day as so published on the
next succeeding Domestic Business Day, and (ii) if no such rate is so published
on such next succeeding Domestic Business Day, the Federal Funds Rate for such
day shall be the average rate quoted to Morgan Guaranty Trust Company of New
York on such day on such transactions as determined by the Administrative Agent.

     "FINANCING DOCUMENTS" means this Agreement and the Notes.

     "FIXED RATE LOANS" means Euro-Dollar Loans or Money Market Loans (excluding
Money Market LIBOR Loans bearing interest at the Base Rate pursuant to Section
8.01(a)) or any combination of the foregoing.

     "GROUP OF LOANS" means at any time a group of Committed Loans consisting of
(i) all Base Rate Loans which are outstanding at such time or (ii) all Euro-
Dollar Loans having the same Interest Period at such time; provided that, if a
Committed Loan of any particular Bank is converted to or made as a Base Rate
Loan pursuant to Section 8.02 or 8.04, such Loan shall be included in the same
Group or Groups of Loans from time to time as it would have been in if it had
not been so converted or made.

     "GUARANTEE" by any Person means any obligation, contingent or otherwise, of
such Person directly or indirectly guaranteeing any Debt of any other Person
and, without limiting the generality of the foregoing, any obligation, direct

                                       6
<PAGE>
 
or indirect, contingent or otherwise, of such Person (i) to purchase or pay (or
advance or supply funds for the purchase or payment of) such Debt (whether
arising by virtue of partnership arrangements, by agreement to keep-well, to
purchase assets, goods, securities or services, to take-or-pay, or to maintain
financial statement conditions or otherwise) or (ii) entered into for the
purpose of assuring in any other manner the holder of such Debt of the payment
thereof or to protect such holder against loss in respect thereof (in whole or
in part), provided that the term Guarantee shall not include endorsements for
collection or deposit in the ordinary course of business.  The term "GUARANTEE"
used as a verb has a corresponding meaning.

     "GUARANTORS" means ACE Insurance, CODA and Tempest.

     "INDEMNITEE" has the meaning set forth in Section 10.03(b).

     "INTEREST PERIOD" means:  (1) with respect to each Euro-Dollar Loan, the
period commencing on the date of borrowing specified in the applicable Notice of
Committed Borrowing or on the date specified in an applicable Notice of Interest
Rate Election and ending one, two, three or six months thereafter, as the
Borrower may elect in the applicable notice; provided that:

               (a) any Interest Period which would otherwise end on a day which
     is not a Euro-Dollar Business Day shall, subject to clause (c) below, be
     extended to the next succeeding Euro-Dollar Business Day unless such Euro-
     Dollar Business Day falls in another calendar month, in which case such
     Interest Period shall end on the next preceding Euro-Dollar Business Day;

               (b) any Interest Period which begins on the last Euro-Dollar
     Business Day of a calendar month (or on a day for which there is no
     numerically corresponding day in the calendar month at the end of such
     Interest Period) shall, subject to clause (c) below, end on the last Euro-
     Dollar Business Day of a calendar month; and

               (c) any Interest Period which would otherwise end after the
     Termination Date shall end on the Termination Date;

          (2) with respect to each Money Market LIBOR Borrowing, the period
commencing on the date of such Borrowing and ending such whole number of months
thereafter as the Borrower may elect in accordance with Section 2.03; provided
that:

                                       7
<PAGE>
 
               (a) any Interest Period which would otherwise end on a day which
     is not a Euro-Dollar Business Day shall, subject to clause (c) below, be
     extended to the next succeeding Euro-Dollar Business Day unless such Euro-
     Dollar Business Day falls in another calendar month, in which case such
     Interest Period shall end on the next preceding Euro-Dollar Business Day;

               (b) any Interest Period which begins on the last Euro-Dollar
     Business Day of a calendar month (or on a day for which there is no
     numerically corresponding day in the calendar month at the end of such
     Interest Period) shall, subject to clause (c) below, end on the last Euro-
     Dollar Business Day of a calendar month; and

               (c) any Interest Period which would otherwise end after the
     Termination Date shall end on the Termination Date; and

          (3) with respect to each Money Market Absolute Rate Borrowing, the
period commencing on the date of such Borrowing and ending such number of days
thereafter (but not less than 7 days) as the Borrower may elect in accordance
with Section 2.03; provided that:

               (a) any Interest Period which would otherwise end on a day which
     is not a Euro-Dollar Business Day shall, subject to clause (b) below, be
     extended to the next succeeding Euro-Dollar Business Day; and

               (b) any Interest Period which would otherwise end after the
     Termination Date shall end on the Termination Date.

     "INTERNAL REVENUE CODE" means the Internal Revenue Code of 1986, as
amended, or any successor statute.

     "LIBOR AUCTION" means a solicitation of Money Market Quotes setting forth
Money Market Margins based on the London Interbank Offered Rate pursuant to
Section 2.03.

     "LIEN" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind, or any other type of
preferential arrangement that has the practical effect of creating a security
interest, in respect of such asset. For the purposes of this Agreement, the
Borrower or any Subsidiary shall be deemed to own subject to a Lien any asset
which it has acquired or holds subject to the interest of a vendor or lessor
under any conditional sale agreement, capital lease or other title retention
agreement relating to such asset.

                                       8
<PAGE>
 
     "LOAN" means a Base Rate Loan or a Euro-Dollar Loan or a Money Market Loan
and "LOANS" means Base Rate Loans or Euro-Dollar Loans or Money Market Loans or
any combination of the foregoing.

     "LONDON INTERBANK OFFERED RATE" has the meaning set forth in Section
2.07(b).

     "MANAGING AGENT" means Citibank, N.A. in its capacity as managing agent in
respect of this Agreement.

     "MATERIAL DEBT" means Debt (other than the Notes) of the Borrower and/or
one or more of its Subsidiaries, arising in one or more related or unrelated
transactions, in an aggregate principal or face amount exceeding $25,000,000.

     "MATERIAL FINANCIAL OBLIGATIONS" means a principal or face amount of Debt
and/or current payment obligations in respect of Derivatives Obligations of the
Borrower and/or one or more of its Subsidiaries, arising in one or more related
or unrelated transactions, exceeding in the aggregate $25,000,000.

     "MONEY MARKET ABSOLUTE RATE" has the meaning set forth in Section 2.03(d).

     "MONEY MARKET ABSOLUTE RATE LOAN" means a loan to be made by a Bank
pursuant to an Absolute Rate Auction.

     "MONEY MARKET LENDING OFFICE" means, as to each Bank, its Domestic Lending
Office or such other office, branch or affiliate of such Bank as it may
hereafter designate as its Money Market Lending Office by notice to the Borrower
and the Administrative Agent; provided that any Bank may from time to time by
notice to the Borrower and the Administrative Agent designate separate Money
Market Lending Offices for its Money Market LIBOR Loans, on the one hand, and
its Money Market Absolute Rate Loans, on the other hand, in which case all
references herein to the Money Market Lending Office of such Bank shall be
deemed to refer to either or both of such offices, as the context may require.

     "MONEY MARKET LIBOR LOAN" means a loan to be made by a Bank pursuant to a
LIBOR Auction (including such a loan bearing interest at the Base Rate pursuant
to Section 8.01(a)).

     "MONEY MARKET LOAN" means a Money Market LIBOR Loan or a Money Market
Absolute Rate Loan.

     "MONEY MARKET MARGIN" has the meaning set forth in Section 2.03(d).

                                       9
<PAGE>
 
     "MONEY MARKET QUOTE" means an offer by a Bank to make a Money Market Loan
in accordance with Section 2.03.

     "NOTES" means promissory notes of the Borrower, substantially in the form
of Exhibit A hereto, evidencing the obligation of the Borrower to repay the
Loans, and "NOTE" means any one of such promissory notes issued hereunder.

     "NOTICE OF BORROWING" means a Notice of Committed Borrowing (as defined in
Section 2.02) or a Notice of Money Market Borrowing (as defined in Section
2.03(f)).

     "NOTICE OF COMMITTED BORROWING" has the meaning set forth in Section .

     "NOTICE OF INTEREST RATE ELECTION" has the meaning set forth in Section
elec.int.rates2.11.

     "OBLIGORS" means the Borrower and each of the Guarantors.

     "OTHER TAXES" has the meaning set forth in Section 8.04(b).

     "PARENT" means, with respect to any Bank, any Person controlling such Bank.

     "PARTICIPANT" has the meaning set forth in Section 10.06(b).

     "PERSON" means an individual, a corporation, a partnership, a limited
liability company, an association, a trust or any other entity or organization,
including a government or political subdivision or an agency or instrumentality
thereof.

     "PRIME RATE" means the rate of interest publicly announced by Morgan
Guaranty Trust Company of New York in New York City from time to time as its
Prime Rate.

     "REFERENCE BANKS" means the principal London offices of Deutsche Bank AG,
Mellon Bank N.A. and Morgan Guaranty Trust Company of New York.

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

     "RELATED DOCUMENTS" means (i) the Financing Documents, (ii) the "Financing
Documents" as defined in the Five-Year Credit Agreement of even

                                       10
<PAGE>
 
date herewith among the parties hereto, (iii) the "Financing Documents" as
defined in the Amended and Restated Reimbursement Agreement dated as of December
11, 1997 among ACE Insurance, the Banks parties thereto and Morgan Guaranty
Trust Company of New York, as Issuing Bank and Administrative Agent for such
Banks and (iv) the "Financing Documents" as defined in the Term Loan Agreement
of even date herewith among ACE US, the Borrower, the Banks parties thereto and
Morgan Guaranty Trust Company of New York, as administrative agent for such
Banks, in each case as the same may be amended and in effect from time to time.

     "REQUIRED BANKS" means at any time Banks having at least 66 2/3% of the
aggregate amount of the Commitments or, if the Commitments shall have been
terminated, holding Notes evidencing at least 66 2/3% of the aggregate unpaid
principal amount of the Loans.

     "SUBSIDIARY" means, as to any Person, any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by such Person; unless
otherwise specified, "SUBSIDIARY" means a Subsidiary of the Borrower.

     "SYNDICATION AGENT" means either J.P. Morgan Securities Inc. or Mellon Bank
N.A. in its capacity as a syndication agent in respect of this Agreement, and
"SYNDICATION AGENTS" means both of them.

     "TAXES" has the meaning set forth in Section 8.04(a).

     "TEMPEST" means Tempest Reinsurance Company Limited, a Bermuda limited
liability company, and its successors.

     "TERMINATION DATE" means December 10, 1998 or, if such day is not a Euro-
Dollar Business Day, the next preceding Euro-Dollar Business Day.

     "WHOLLY-OWNED CONSOLIDATED SUBSIDIARY" means any Consolidated Subsidiary
all of the shares of capital stock or other ownership interests of which (except
directors' qualifying shares) are at the time directly or indirectly owned by
the Borrower.

     Section 1.02.  Accounting Terms and Determinations.  Unless otherwise
specified herein, all accounting terms used herein shall be interpreted, all
accounting determinations hereunder shall be made, and all financial statements
required to be delivered hereunder shall be prepared in accordance with United
States generally accepted accounting principles as in effect from time to time,

                                       11
<PAGE>
 
applied on a basis consistent (except for changes concurred in by the Borrower's
independent public accountants) with the most recent audited consolidated
financial statements of the Borrower and its Consolidated Subsidiaries delivered
to the Banks; provided that, if the Borrower notifies the Administrative Agent
that the Borrower wishes to amend any covenant in Article 5 to eliminate the
effect of any change in generally accepted accounting principles on the
operation of such covenant (or if the Administrative Agent notifies the Borrower
that the Required Banks wish to amend Article 5 for such purpose), then the
Borrower's compliance with such covenant shall be determined on the basis of
generally accepted accounting principles in effect immediately before the
relevant change in generally accepted accounting principles became effective,
until either such notice is withdrawn or such covenant is amended in a manner
satisfactory to the Borrower and the Required Banks.

     Section 1.03. Types of Borrowings. The term "BORROWING" denotes the
aggregation of Loans of one or more Banks to be made to the Borrower pursuant to
Article 2 on a single date and for a single Interest Period. Borrowings are
classified for purposes of this Agreement either by reference to the pricing of
Loans comprising such Borrowing (e.g., a "EURO-DOLLAR BORROWING" is a Borrowing
comprised of Euro-Dollar Loans) or by reference to the provisions of Article 2
under which participation therein is determined (i.e., a "COMMITTED BORROWING"
is a Borrowing under Section 2.01 in which all Banks participate in proportion
to their Commitments, while a "MONEY MARKET BORROWING" is a Borrowing under
Section 2.03 in which the Bank participants are determined on the basis of their
bids in accordance therewith).

     Section 1.04. United States Dollars. Each reference herein to "DOLLARS" or
"$" shall refer to United States Dollars.

                                   ARTICLE 2

                                  The Credits

     Section 2.01.  Commitments to Lend.  Each Bank severally agrees, on
the terms and conditions set forth in this Agreement, to make loans to the
Borrower pursuant to this Section from time to time prior to the Termination
Date in amounts such that the aggregate principal amount of Committed Loans by
such Bank at any one time outstanding shall not exceed the amount of its
Commitment. Each Borrowing under this Section shall be in an aggregate principal
amount of $10,000,000 or any larger multiple of $1,000,000 (except that any such
Borrowing may be in the aggregate amount available in accordance with Section
3.02(c)) and shall be made from the several Banks ratably in proportion to their
respective

                                       12
<PAGE>
 
Commitments.  Within the foregoing limits, the Borrower may borrow under this
Section, repay, or to the extent permitted by Section 2.12, prepay Loans and
reborrow at any time prior to the Termination Date.

     Section 2.02. Notice of Committed Borrowing. The Borrower shall give the
Administrative Agent notice (such notice to be signed by any two of the
Authorized Officers and hereinafter referred to as a "NOTICE OF COMMITTED
BORROWING") not later than 10:30 A.M. (New York City time) on (x) the date of
each Base Rate Borrowing and (y) the third Euro-Dollar Business Day before each
Euro-Dollar Borrowing, specifying:

     (a) the date of such Borrowing, which shall be a Domestic Business Day in
the case of a Base Rate Borrowing or a Euro-Dollar Business Day in the case of a
Euro-Dollar Borrowing,

     (b) the aggregate amount of such Borrowing,

     (c) whether the Loans comprising such Borrowing are to be Base Rate Loans
or Euro-Dollar Loans, and

     (d) in the case of a Fixed Rate Borrowing, the duration of the Interest
Period applicable thereto, subject to the provisions of the definition of
Interest Period.

     Section 2.03.  Money Market Borrowings.  (a) The Money Market Option.  In
addition to Committed Borrowings pursuant to Section 2.01, the Borrower may, as
set forth in this Section, request the Banks prior to the Termination Date to
make offers to make Money Market Loans to the Borrower. The Banks may, but shall
have no obligation to, make such offers and the Borrower may, but shall have no
obligation to, accept any such offers in the manner set forth in this Section.

     (b) Money Market Quote Request.  When the Borrower wishes to request offers
to make Money Market Loans under this Section, it shall transmit to the
Administrative Agent by telex or facsimile transmission a Money Market Quote
Request substantially in the form of Exhibit B hereto so as to be received no
later than 10:30 A.M. (New York City time) on (x) the fifth Euro-Dollar Business
Day prior to the date of Borrowing proposed therein, in the case of a LIBOR
Auction or (y) the Domestic Business Day next preceding the date of Borrowing
proposed therein, in the case of an Absolute Rate Auction (or, in either case,
such other time or date as the Borrower and the Administrative Agent shall have
mutually agreed and shall have notified to the Banks not later than the date of
the Money Market

                                       13
<PAGE>
 
Quote Request for the first LIBOR Auction or Absolute Rate Auction for which
such change is to be effective) specifying:

               (i)   the proposed date of Borrowing, which shall be a Euro-
     Dollar Business Day in the case of a LIBOR Auction or a Domestic Business
     Day in the case of an Absolute Rate Auction,

               (ii)  the aggregate amount of such Borrowing, which shall be
     $10,000,000 or a larger multiple of $1,000,000,

               (iii) the duration of the Interest Period applicable thereto,
     subject to the provisions of the definition of Interest Period, and

               (iv) whether the Money Market Quotes requested are to set forth a
     Money Market Margin or a Money Market Absolute Rate.

     The Borrower may request offers to make Money Market Loans for more than
one Interest Period in a single Money Market Quote Request.  No Money Market
Quote Request shall be given within five Euro-Dollar Business Days (or such
other number of days as the Borrower and the Administrative Agent may agree) of
any other Money Market Quote Request.

     (c) Invitation for Money Market Quotes.  Promptly upon receipt of a Money
Market Quote Request, the Administrative Agent shall send to the Banks by telex
or facsimile transmission an Invitation for Money Market Quotes substantially in
the form of Exhibit C hereto, which shall constitute an invitation by the
Borrower to each Bank to submit Money Market Quotes offering to make the Money
Market Loans to which such Money Market Quote Request relates in accordance with
this Section.

     (d) Submission and Contents of Money Market Quotes.  (i) Each Bank may
submit a Money Market Quote containing an offer or offers to make Money Market
Loans in response to any Invitation for Money Market Quotes.  Each Money Market
Quote must comply with the requirements of this subsection (d) and must be
submitted to the Administrative Agent by telex or facsimile transmission at its
offices specified in or pursuant to Section 10.01 not later than (x) 2:00 P.M.
(New York City time) on the fourth Euro-Dollar Business Day prior to the
proposed date of Borrowing, in the case of a LIBOR Auction or (y) 9:30 A.M. (New
York City time) on the proposed date of Borrowing, in the case of an Absolute
Rate Auction (or, in either case, such other time or date as the Borrower and
the Administrative Agent shall have mutually agreed and shall have notified to
the Banks not later than the date of the Money Market Quote Request for the
first LIBOR Auction or Absolute Rate Auction for which such change is to be

                                       14
<PAGE>
 
effective); provided that Money Market Quotes submitted by the Administrative
Agent (or any affiliate of the Administrative Agent) in the capacity of a Bank
may be submitted, and may only be submitted, if the Administrative Agent or such
affiliate notifies the Borrower of the terms of the offer or offers contained
therein not later than (x) one hour prior to the deadline for the other Banks,
in the case of a LIBOR Auction or (y) 15 minutes prior to the deadline for the
other Banks, in the case of an Absolute Rate Auction.  Subject to Articles 3 and
6, any Money Market Quote so made shall be irrevocable except with the written
consent of the Administrative Agent given on the instructions of the Borrower.

     (ii) Each Money Market Quote shall be in substantially the form of Exhibit
D hereto and shall in any case specify:

                    (A) the proposed date of Borrowing,

                    (B) the principal amount of the Money Market Loan for which
          each such offer is being made, which principal amount (w) may be
          greater than or less than the Commitment of the quoting Bank, (x) must
          be $5,000,000 or a larger multiple of $1,000,000, (y) may not exceed
          the principal amount of Money Market Loans for which offers were
          requested and (z) may be subject to an aggregate limitation as to the
          principal amount of Money Market Loans for which offers being made by
          such quoting Bank may be accepted,

                    (C) in the case of a LIBOR Auction, the margin above or
          below the applicable London Interbank Offered Rate (the "MONEY MARKET
          MARGIN") offered for each such Money Market Loan, expressed as a
          percentage (specified to the nearest 1/10,000th of 1%) to be added to
          or subtracted from such base rate,

                    (D) in the case of an Absolute Rate Auction, the rate of
          interest per annum (specified to the nearest 1/10,000th of 1%) (the
          "MONEY MARKET ABSOLUTE RATE") offered for each such Money Market Loan,
          and

                    (E) the identity of the quoting Bank.

     A Money Market Quote may set forth up to five separate offers by the
quoting Bank with respect to each Interest Period specified in the related
Invitation for Money Market Quotes.

     (iii) Any Money Market Quote shall be disregarded if it:

                                       15
<PAGE>
 
                    (A) is not substantially in conformity with Exhibit D hereto
          or does not specify all of the information required by subsection
          (d)(ii);

                    (B) contains qualifying, conditional or similar language;

                    (C) proposes terms other than or in addition to those set
          forth in the applicable Invitation for Money Market Quotes; or

                    (D) arrives after the time set forth in subsection (d)(i).

     (e) Notice to Borrower.  The Administrative Agent shall promptly notify the
Borrower of the terms (x) of any Money Market Quote submitted by a Bank that is
in accordance with subsection (d) and (y) of any Money Market Quote that amends,
modifies or is otherwise inconsistent with a previous Money Market Quote
submitted by such Bank with respect to the same Money Market Quote Request.  Any
such subsequent Money Market Quote shall be disregarded by the Administrative
Agent unless such subsequent Money Market Quote is submitted solely to correct a
manifest error in such former Money Market Quote.  The Administrative Agent's
notice to the Borrower shall specify (A) the aggregate principal amount of Money
Market Loans for which offers have been received for each Interest Period
specified in the related Money Market Quote Request, (B) the respective
principal amounts and Money Market Margins or Money Market Absolute Rates, as
the case may be, so offered and (C) if applicable, limitations on the aggregate
principal amount of Money Market Loans for which offers in any single Money
Market Quote may be accepted.

     (f) Acceptance and Notice by Borrower.  Not later than 10:30 A.M. (New York
City time) on (x) the third Euro-Dollar Business Day prior to the proposed date
of Borrowing, in the case of a LIBOR Auction or (y) the proposed date of
Borrowing, in the case of an Absolute Rate Auction (or, in either case, such
other time or date as the Borrower and the Administrative Agent shall have
mutually agreed and shall have notified to the Banks not later than the date of
the Money Market Quote Request for the first LIBOR Auction or Absolute Rate
Auction for which such change is to be effective), the Borrower shall notify the
Administrative Agent of its acceptance or non-acceptance of the offers so
notified to it pursuant to subsection (e).  In the case of acceptance, such
notice (such notice to be signed by any two of the Authorized Officers and
hereinafter referred to as a "NOTICE OF MONEY MARKET BORROWING") shall specify
the aggregate principal amount of offers for each Interest Period that are
accepted.  The Borrower may accept any Money Market Quote in whole or in part;
provided that:

                                       16
<PAGE>
 
               (i)   the aggregate principal amount of each Money Market
     Borrowing may not exceed the applicable amount set forth in the related
     Money Market Quote Request,

               (ii)  the principal amount of each Money Market Borrowing must be
     $10,000,000 or a larger multiple of $1,000,000,

               (iii) acceptance of offers may only be made on the basis of
     ascending Money Market Margins or Money Market Absolute Rates, as the case
     may be, and

               (iv)  the Borrower may not accept any offer that is described in
     subsection (d)(iii) or that otherwise fails to comply with the requirements
     of this Agreement.

     (g)  Allocation by Administrative Agent.  If offers are made by two or more
Banks with the same Money Market Margins or Money Market Absolute Rates, as the
case may be, for a greater aggregate principal amount than the amount in respect
of which such offers are accepted for the related Interest Period, the principal
amount of Money Market Loans in respect of which such offers are accepted shall
be allocated by the Administrative Agent among such Banks as nearly as possible
(in multiples of $1,000,000, as the Administrative Agent may deem appropriate)
in proportion to the aggregate principal amounts of such offers. Determinations
by the Administrative Agent of the amounts of Money Market Loans shall be
conclusive in the absence of manifest error.

     Section 2.04.  Notice of Banks; Funding of Loans.  (a) Upon receipt of a
Notice of Borrowing, the Administrative Agent shall promptly notify each Bank of
the contents thereof and of such Bank's share (if any) of such Borrowing and
such Notice of Borrowing shall not thereafter be revocable by the Borrower.

     (b)  Not later than 12:00 Noon (New York City time) on the date of each
Borrowing, each Bank participating therein shall make available its share of
such Borrowing, in Federal or other funds immediately available in New York
City, to the Administrative Agent at its address referred to in Section 10.01.
Unless the Administrative Agent determines that any applicable condition
specified in Article 3 has not been satisfied, the Administrative Agent will
make the funds so received from the Banks available to the Borrower at the
Administrative Agent's aforesaid address.

     (c)  Unless the Administrative Agent shall have received notice from a Bank
prior to the date of any Borrowing that such Bank will not make available to the
Administrative Agent such Bank's share of such Borrowing, the

                                       17
<PAGE>
 
Administrative Agent may assume that such Bank has made such share available to
the Administrative Agent on the date of such Borrowing in accordance with
subsection (b) of this Section 2.04 and the Administrative Agent may, in
reliance upon such assumption, make available to the Borrower on such date a
corresponding amount.  If and to the extent that such Bank shall not have so
made such share available to the Administrative Agent, such Bank and the
Borrower severally agree to repay to the Administrative Agent forthwith on
demand such corresponding amount together with interest thereon, for each day
from the date such amount is made available to the Borrower until the date such
amount is repaid to the Administrative Agent, at (i) in the case of the
Borrower, a rate per annum equal to the interest rate applicable thereto
pursuant to Section 2.07 and (ii) in the case of such Bank, the Federal Funds
Rate.  If such Bank shall repay to the Administrative Agent such corresponding
amount, such amount so repaid shall constitute such Bank's Loan included in such
Borrowing for purposes of this Agreement.

     Section 2.05.  Notes.  (a)  The Loans of each Bank shall be evidenced by a
single Note payable to the order of such Bank for the account of its Applicable
Lending Office in an amount equal to the aggregate unpaid principal amount of
such Bank's Loans.

     (b) Each Bank may, by notice to the Borrower and the Administrative Agent,
request that its Loans of a particular type be evidenced by a separate Note in
an amount equal to the aggregate unpaid principal amount of such Loans.  Each
such Note shall be in substantially the form of Exhibit A hereto with
appropriate modifications to reflect the fact that it evidences solely Loans of
the relevant type. Each reference in this Agreement to the "NOTE" of such Bank
shall be deemed to refer to and include any or all of such Notes, as the context
may require.

     (c) Upon receipt of each Bank's Note pursuant to Section 3.01(a), the
Administrative Agent shall forward such Note to such Bank.  Each Bank shall
record the date, amount, type and maturity of each Loan made by it and the date
and amount of each payment of principal made by the Borrower with respect
thereto, and may, if such Bank so elects in connection with any transfer or
enforcement of its Note, endorse on the schedule forming a part thereof
appropriate notations to evidence the foregoing information with respect to each
such Loan then outstanding; provided that the failure of any Bank to make any
such recordation or endorsement shall not affect the obligations of any Obligor
hereunder or under the Notes.  Each Bank is hereby irrevocably authorized by the
Borrower so to endorse its Note and to attach to and make a part of its Note a
continuation of any such schedule as and when required.

                                       18
<PAGE>
 
     Section 2.06.  Maturity of Loans.  (a) The Committed Loans shall mature,
and the principal amount thereof shall be due and payable, together with accrued
interest thereon, on the Termination Date.

     (b) Each Money Market Loan included in any Money Market Borrowing shall
mature, and the principal amount thereof shall be due and payable, together with
accrued interest thereon, on the last day of the Interest Period applicable to
such Money Market Borrowing.

     Section 2.07.  Interest Rates.  (a) Each Base Rate Loan shall bear interest
on the outstanding principal amount thereof, for each day from the date such
Loan is made until it becomes due, at a rate per annum equal to the Base Rate
for such day.  Such interest shall be payable at maturity, quarterly in arrears
on the last day of each March, June, September and December prior to maturity,
and with respect to the principal amount of any Base Rate Loan converted to a
Euro-Dollar Loan, on the date such amount is so converted.  Any overdue
principal of or interest on any Base Rate Loan shall bear interest, payable on
demand, for each day until paid at a rate per annum equal to the sum of 2% plus
the rate otherwise applicable to Base Rate Loans for such day.

     (b) Each Euro-Dollar Loan shall bear interest on the outstanding principal
amount thereof, for each day during each Interest Period applicable thereto, at
a rate per annum equal to the sum of the Euro-Dollar Margin for such day plus
the London Interbank Offered Rate applicable to such Interest Period. Such
interest shall be payable for each Interest Period on the last day thereof and,
if such Interest Period is longer than three months, at intervals of three
months after the first day thereof.

     "EURO-DOLLAR MARGIN" means (i) 0.24% per annum, for each day on which the
aggregate outstanding principal amount of the Loans is equal to or less than 50%
of the aggregate amount of the Commitments, and (ii) 0.29% per annum, for any
other day.

     The "LONDON INTERBANK OFFERED RATE" applicable to any Interest Period means
the average (rounded upward, if necessary, to the next higher 1/16 of 1%) of the
respective rates per annum at which deposits in dollars are offered to each of
the Reference Banks in the London interbank market at approximately 11:00 A.M.
(London time) two Euro-Dollar Business Days before the first day of such
Interest Period in an amount approximately equal to the principal amount of the
Euro-Dollar Loan of such Reference Bank to which such Interest Period is to
apply and for a period of time comparable to such Interest Period.

                                       19
<PAGE>
 
     (c)  Any overdue principal of or interest on any Euro-Dollar Loan shall
bear interest, payable on demand, for each day until paid at a rate per annum
equal to the higher of (i) the sum of 2% plus the Euro-Dollar Margin plus the
London Interbank Offered Rate applicable to such Loan at the date of such
payment was due and (ii) the sum of 2% plus the Euro-Dollar Margin plus the
quotient obtained (rounded upward, if necessary, to the next higher 1/100 of 1%)
by dividing (x) the average (rounded upward, if necessary, to the next higher
1/16 of 1%) of the respective rates per annum at which one day (or, if such
amount due remains unpaid more than three Euro-Dollar Business Days, then for
such other period of time not longer than six months as the Administrative Agent
may select) deposits in dollars in an amount approximately equal to such overdue
payment due to each of the Reference Banks are offered to such Reference Bank in
the London interbank market for the applicable period determined as provided
above by (y) 1.00 minus the Euro-Dollar Reserve Percentage (or, if the
circumstances described in clause (a) or (b) of Section 8.01 shall exist, at a
rate per annum equal to the sum of 2% plus the rate applicable to Base Rate
Loans for such day).

     (d)  Subject to Section 8.01(a), each Money Market LIBOR Loan shall bear
interest on the outstanding principal amount thereof, for the Interest Period
applicable thereto, at a rate per annum equal to the sum of the London Interbank
Offered Rate for such Interest Period (determined in accordance with Section
2.07(b) as if the related Money Market LIBOR Borrowing were a Euro-Dollar
Borrowing) plus (or minus) the Money Market Margin quoted by the Bank making
such Loan in accordance with Section 2.03.  Each Money Market Absolute Rate Loan
shall bear interest on the outstanding principal amount thereof, for the
Interest Period applicable thereto, at a rate per annum equal to the Money
Market Absolute Rate quoted by the Bank making such Loan in accordance with
Section 2.03.  Such interest shall be payable for each Interest Period on the
last day thereof and, if such Interest Period is longer than three months, at
intervals of three months after the first day thereof.  Any overdue principal of
or interest on any Money Market Loan shall bear interest, payable on demand, for
each day until paid at a rate per annum equal to the sum of 2% plus the Base
Rate for such day.

     (e)  The Administrative Agent shall determine each interest rate applicable
to the Loans hereunder.  The Administrative Agent shall give prompt notice to
the Borrower and the participating Banks of each rate of interest so determined,
and its determination thereof shall be conclusive in the absence of manifest
error.

     (f)  Each Reference Bank agrees to use its best efforts to furnish
quotations to the Administrative Agent as contemplated by this Section.  If any
Reference Bank does not furnish a timely quotation, the Administrative Agent

                                       20
<PAGE>
 
shall determine the relevant interest rate on the basis of the quotation or
quotations furnished by the remaining Reference Bank or Banks or, if none of
such quotations is available on a timely basis, the provisions of Section 8.01
shall apply.

     Section 2.08.  Facility Fee.  The Borrower shall pay to the Administrative
Agent for the account of the Banks ratably a facility fee at the rate of 0.06%
per annum.  Such facility fee shall accrue (i) from and including the Closing
Date to but excluding the Termination Date (or earlier date of termination of
the Commitments in their entirety), on the daily aggregate amount of the
Commitments (whether used or unused) and (ii) from and including the Termination
Date or such earlier date of termination to but excluding the date the Loans
shall be repaid in their entirety, on the daily aggregate outstanding principal
amount of the Loans.  Accrued fees under this Section shall be payable quarterly
in arrears on each March 31, June 30, September 30 and December 31 and upon the
date of termination of the Commitments in their entirety (and, if later, the
date the Loans shall be repaid in their entirety).

     Section 2.09.  Optional Termination or Reduction of Commitments.  The
Borrower may, upon at least three Domestic Business Days' notice to the
Administrative Agent, (i) terminate the Commitments at any time, if no Loans are
outstanding at such time or (ii) ratably reduce from time to time by an
aggregate amount of $25,000,000 or any larger multiple of $5,000,000, the
aggregate amount of the Commitments in excess of the aggregate outstanding
principal amount of the Loans.  Upon receipt of any notice pursuant to this
Section 2.09, the Administrative Agent shall promptly notify the Banks of the
contents of such notice.

     Section 2.10.  Scheduled Termination of Commitments.  The Commitments shall
terminate on the Termination Date, and any Loans then outstanding (together with
accrued interest thereon) shall be due and payable on such date.

     Section 2.11.  Method of Electing Interest Rates.  (a) The Loans included
in each Committed Borrowing shall bear interest initially at the type of rate
specified by the Borrower in the applicable Notice of Committed Borrowing.
Thereafter, the Borrower may from time to time elect to change or continue the
type of interest rate borne by each Group of Loans (subject to subsection (d) of
this Section and the provisions of Article ), as follows:

               (i)  if such Loans are Base Rate Loans, the Borrower may elect to
     convert such Loans to Euro-Dollar Loans as of any Euro-Dollar Business Day;
     and

                                       21
<PAGE>
 
               (ii)  if such Loans are Euro-Dollar Loans, the Borrower may elect
     to convert such Loans to Base Rate Loans or elect to continue such Loans as
     Euro-Dollar Loans for an additional Interest Period, subject to Section
     2.14 if any such conversion or continuation is effective on any day other
     than the last day of an Interest Period applicable to such Loans.

Each such election shall be made by delivering a notice (a "NOTICE OF INTEREST
RATE ELECTION") to the Administrative Agent not later than 10:30 A.M. (New York
City time) on the third Euro-Dollar Business Day before the conversion or
continuation selected in such notice is to be effective. A Notice of Interest
Rate Election may, if it so specifies, apply to only a portion of the aggregate
principal amount of the relevant Group of Loans; provided that (i) such portion
is allocated ratably among the Loans comprising such Group and (ii) the portion
to which such notice applies, and the remaining portion to which it does not
apply, are each at least $10,000,000 or any larger amount in multiples of
$1,000,000 (unless such portion is comprised of Base Rate Loans). If no such
notice is timely received before the end of an Interest Period for any Group of
Euro-Dollar Loans, the Borrower shall be deemed to have elected that such Group
of Loans be converted to Base Rate Loans at the end of such Interest Period.

     (b) Each Notice of Interest Rate Election shall specify:

               (i)   the Group of Loans (or portion thereof) to which such
     notice applies;

               (ii)  the date on which the conversion or continuation selected
     in such notice is to be effective, which shall comply with the applicable
     clause of subsection (a) above;

               (iii) if the Loans comprising such Group are to be converted, the
     new type of Loans and, if the Loans resulting from such conversion are to
     be Euro-Dollar Loans, the duration of the initial Interest Period
     applicable thereto; and

               (iv)  if such Loans are to be continued as Euro-Dollar Loans for
     an additional Interest Period, the duration of such additional Interest
     Period.

Each Interest Period specified in a Notice of Interest Rate Election shall
comply with the provisions of the definition of Interest Period.

     (c)  Promptly after receiving a Notice of Interest Rate Election from the
Borrower pursuant to subsection (a) above, the Administrative Agent shall notify

                                       22
<PAGE>
 
each Bank of the contents thereof and such notice shall not thereafter be
revocable by the Borrower.

     (d) The Borrower shall not be entitled to elect to convert any Committed
Loans to, or continue any Committed Loans for an additional Interest Period as,
Euro-Dollar Loans if (i) the aggregate principal amounts of any Group of Euro-
Dollar Loans created or continued as a result of such election would be less
than $10,000,000 or (ii) a Default shall have occurred and be continuing when
the Borrower delivers notice of such election to the Administrative Agent.

     Section 2.12.  Optional Prepayments.  (a) Subject in the case of any Euro-
Dollar Loan to Section 2.14, the Borrower may, in the case of the Group of Base
Rate Loans (or any Money Market Borrowing bearing interest at the Base Rate
pursuant to Section 8.01(a)), upon at least one Domestic Business Day's notice
to the Administrative Agent, prepay such Group or Borrowing, or in the case of
any Group of Euro-Dollar Loans, upon at least three Euro-Dollar Business Days'
notice to the Administrative Agent, prepay such Group, in each case in whole at
any time, or from time to time in part in amounts aggregating $10,000,000 or any
larger multiple of $1,000,000, by paying the principal amount to be prepaid
together with accrued interest thereon to the date of prepayment. Each such
optional prepayment shall be applied to prepay ratably the Loans of the several
Banks included in such Group or Borrowing.

     (b) Except as provided in Section 2.12(a), the Borrower may not prepay all
or any portion of the principal amount of any Money Market Loan prior to the
maturity thereof.

     (c) Upon receipt of a notice of prepayment pursuant to this Section, the
Administrative Agent shall promptly notify each Bank of the contents thereof and
of such Bank's ratable share (if any) of such prepayment and such notice shall
not thereafter be revocable by the Borrower.

     Section 2.13.  General Provisions as to Payments.  (a) The Borrower shall
make each payment of principal of, and interest on, the Loans and of fees
hereunder, not later than 2:00 P.M. (New York City time) on the date when due,
in Federal or other funds immediately available in New York City and in the
lawful currency of the United States, to the Administrative Agent at its address
referred to in Section 10.01.  The Administrative Agent will promptly distribute
to each Bank its ratable share of each such payment received by the
Administrative Agent for the account of the Banks.  Whenever any payment of
principal of, or interest on, the Base Rate Loans or of fees shall be due on a
day which is not a Domestic Business Day, the date for payment thereof shall be
extended to the next succeeding Domestic Business Day.  Whenever any payment of
principal of, or

                                       23
<PAGE>
 
interest on, the Euro-Dollar Loans shall be due on a day which is not a Euro-
Dollar Business Day, the date for payment thereof shall be extended to the next
succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day falls
in another calendar month, in which case the date for payment thereof shall be
the next preceding Euro-Dollar Business Day.  Whenever any payment of principal
of, or interest on, the Money Market Loans shall be due on a day which is not a
Euro-Dollar Business Day, the date for payment thereof shall be extended to the
next succeeding Euro-Dollar Business Day.  If the date for any payment of
principal is extended by operation of law or otherwise, interest thereon shall
be payable for such extended time.

     (b) Unless the Administrative Agent shall have received notice from the
Borrower prior to the date on which any payment is due to the Banks hereunder
that the Borrower will not make such payment in full, the Administrative Agent
may assume that the Borrower has made such payment in full to the Administrative
Agent on such date and the Administrative Agent may, in reliance upon such
assumption, cause to be distributed to each Bank on such due date an amount
equal to the amount then due such Bank.  If and to the extent that the Borrower
shall not have so made such payment, each Bank shall repay to the Administrative
Agent forthwith on demand such amount distributed to such Bank together with
interest thereon, for each day from the date such amount is distributed to such
Bank until the date such Bank repays such amount to the Administrative Agent, at
the Federal Funds Rate.

     Section 2.14.  Funding Losses.  If the Borrower makes any payment of
principal with respect to any Fixed Rate Loan or any Fixed Rate Loan is
converted to a different type of Loan (pursuant to Article 2,  or   otherwise)
on any day other than the last day of an Interest Period applicable thereto, or
the last day of an applicable period fixed pursuant to Section 2.07(c), or if
the Borrower fails to borrow, prepay, convert or continue any Fixed Rate Loans
after notice has been given to any Bank in accordance with Section 2.04(a),
2.11(c) or 2.12(c), the Borrower shall reimburse each Bank within 15 days after
demand for any resulting loss or expense incurred by it (or by an existing or,
in the case of the failure of the Borrower to borrow any Fixed Rate Loans,
prospective Participant in the related Loan), including (without limitation) any
loss incurred in obtaining, liquidating or employing deposits from third
parties, but excluding loss of margin for the period after any such payment,
conversion or continuation or failure to borrow, prepay, convert or continue,
provided that such Bank shall have delivered to the Borrower a certificate as to
the amount of such loss or expense and setting forth the calculation thereof,
which certificate shall be conclusive in the absence of manifest error.

                                       24
<PAGE>
 
     Section 2.15.  Computation of Interest and Fees.  Interest based on the
Prime Rate hereunder shall be computed on the basis of a year of 365 days (or
366 days in a leap year) and paid for the actual number of days elapsed
(including the first day but excluding the last day).  All other interest and
all facility fees shall be computed on the basis of a year of 360 days and paid
for the actual number of days elapsed (including the first day but excluding the
last day).

     Section 2.16.  Regulation D Compensation.  For so long as any Bank
maintains reserves against "EUROCURRENCY LIABILITIES" (or any other category of
liabilities which includes deposits by reference to which the interest rate on
Euro-Dollar Loans is determined or any category of extensions of credit or other
assets which includes loans by a non-United States office of such Bank to United
States residents), and as a result the cost to such Bank (or its Euro-Dollar
Lending Office) of making or maintaining its Euro-Dollar Loans is increased,
then such Bank may require the Borrower to pay, contemporaneously with each
payment of interest on the Euro-Dollar Loans, additional interest on the related
Euro-Dollar Loan of such Bank at a rate per annum up to but not exceeding the
excess of (i) (A) the applicable London Interbank Offered Rate divided by (B)
one minus the Euro-Dollar Reserve Percentage over (ii) the applicable London
Interbank Offered Rate.  Any Bank wishing to require payment of such additional
interest (x) shall so notify the Borrower and the Administrative Agent, in which
case such additional interest on the Euro-Dollar Loans of such Bank shall be
payable to such Bank at the place indicated in such notice with respect to each
Interest Period commencing at least three Euro-Dollar Business Days after the
giving of such notice and (y) shall furnish to the Borrower at least five Euro-
Dollar Business Days prior to each date on which interest is payable on the
Euro-Dollar Loans an officer's certificate setting forth the amount to which
such Bank is then entitled under this Section (which shall be consistent with
such Bank's good faith estimate of the level at which the related reserves are
maintained by it).  Each such certificate shall be accompanied by such
information as the Borrower may reasonably request as to the computation set
forth therein.

                                   ARTICLE 3

                                  Conditions

     Section 3.01.  Closing.  The closing hereunder shall occur upon (x)
termination of the Commitments (as defined in the Credit Agreement referred to
below in this clause (x)) under the Credit Agreement dated as of November 15,
1996 among the Borrower, ACE Insurance, CODA, the banks listed therein and
Morgan Guaranty Trust Company of New York, as administrative agent, and payment
in full of all amounts owing thereunder to any of such banks or such

                                       25
<PAGE>
 
administrative agent and (y) receipt by the Administrative Agent of the
following documents, each dated the Closing Date unless otherwise indicated:

     (a) a duly executed Note for the account of each Bank dated on or before
the Closing Date complying with the provisions of Section 2.05;

     (b) an opinion of Maples and Calder, counsel for the Borrower,
substantially in the form of Exhibit E hereto and covering such additional
matters relating to the transactions contemplated hereby as the Required Banks
may reasonably request;

     (c) an opinion of Conyers, Dill & Pearman,  special Bermuda counsel for the
Guarantors, substantially in the form of Exhibit F hereto and covering such
additional matters relating to the transactions contemplated hereby as the
Required Banks may reasonably request;

     (d) an opinion of Mayer, Brown & Platt, New York counsel for the Borrower
and the Guarantors, substantially in the form of Exhibit G hereto and covering
such additional matters relating to the transactions contemplated hereby as the
Required Banks may reasonably request;

     (e) an opinion of Davis Polk & Wardwell, special United States counsel for
the Agents, substantially in the form of Exhibit H hereto and covering such
additional matters relating to the transactions contemplated hereby as the
Required Banks may reasonably request;

     (f) a letter from CT System in New York, New York, substantially in the
form of Exhibit J hereto, evidencing CT System's agreement to act as agent for
service of process for the Obligors pursuant to Section 10.10(b); and

     (g) all documents the Administrative Agent may reasonably request relating
to the existence of the Borrower and the Guarantors, the corporate authority for
and the validity of this Agreement and the Notes, and any other matters relevant
hereto, all in form and substance satisfactory to the Administrative Agent.

The Administrative Agent shall promptly notify the Borrower and the Banks of the
Closing Date, and such notice shall be conclusive and binding on all parties
hereto.

     Section 3.02.  Borrowings.  The obligation of any Bank to make a Loan on
the occasion of any Borrowing is subject to the satisfaction of the following
conditions:

                                       26
<PAGE>
 
     (a)  the fact that the Closing Date shall have occurred on or prior to
December 31, 1997;

     (b) receipt by the Administrative Agent of a Notice of Borrowing as
required by Section 2.02 or 2.03, as the case may be;

     (c) the fact that, immediately after such Borrowing, the aggregate
outstanding principal amount of the Loans will not exceed the aggregate amount
of the Commitments;

     (d) the fact that, immediately before and after such Borrowing, no Default
shall have occurred and be continuing; and

     (e) the fact that the representations and warranties of each Obligor
contained in this Agreement shall be true on and as of the date of such
Borrowing.

Each Borrowing hereunder shall be deemed to be a representation and warranty by
the Obligors on the date of such Borrowing as to the facts specified in clauses
(c), (d) and (e) of this Section.

                                   ARTICLE 4

                        Representations and Warranties

        The Obligors jointly and severally represent and warrant that:

     Section 4.01.  Corporate Existence and Power.  The Borrower is a company
limited by shares and each of the Guarantors is a limited liability company, in
each case duly incorporated and validly existing under the laws of its
jurisdiction of incorporation and the Borrower is in good standing under the
laws of the Cayman Islands.  Each of the Obligors has all corporate powers and
all material governmental licenses, authorizations, consents and approvals
required to carry on its respective business as now conducted.  Each of the
Guarantors is a Wholly-Owned Consolidated Subsidiary of the Borrower.

     Section 4.02.  Corporate and Governmental Authorization; No Contravention.
The execution, delivery and performance by each Obligor of this Agreement and by
the Borrower of the Notes are within its corporate powers, have been duly
authorized by all necessary corporate action, require no action or consent by or
in respect of, or filing with, any governmental body, agency or official and do
not contravene, or constitute a default under, any provision of applicable law
or regulation or of the Memorandum of Association, Articles of

                                       27
<PAGE>
 
Association or Bye-Laws (or any comparable document) of any Obligor or of any
agreement, judgment, injunction, order, decree or other instrument binding upon
any Obligor or any of their respective Subsidiaries or result in the creation or
imposition of any Lien on any asset of any Obligor or any of their respective
Subsidiaries.

     Section 4.03.  Binding Effect.  This Agreement constitutes a valid and
binding agreement of each Obligor and each Note, when executed and delivered in
accordance with this Agreement, will constitute a valid and binding obligation
of the Borrower, in each case enforceable in accordance with its terms.

     Section 4.04.  Financial Information.  (a) The consolidated balance sheet
of the Borrower and its Consolidated Subsidiaries as of September 30, 1996 and
the related consolidated statements of operations, shareholders' equity and cash
flows for the fiscal year then ended, reported on by Coopers & Lybrand LLP,
copies of which have been delivered to each of the Banks, fairly present, in all
material respects, in conformity with generally accepted accounting principles,
the consolidated financial position of the Borrower and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
cash flows for such fiscal year.

     (b) The unaudited consolidated balance sheet of the Borrower and its
Consolidated Subsidiaries as of June 30, 1997 and the related unaudited
consolidated statements of operations and cash flows for the nine months then
ended, copies of which have been delivered to each of the Banks, fairly present,
in all material respects, in conformity with generally accepted accounting
principles (except for the absence of footnotes) applied on a basis consistent
with the financial statements referred to in subsection (a) of this Section, the
consolidated financial position of the Borrower and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
cash flows for such nine month period (subject to normal year-end adjustments).

     (c) Since June 30, 1997 there has been no material adverse change in the
business, financial position, or results of operations of the Borrower and its
Consolidated Subsidiaries, considered as a whole.

     (d) The consolidated balance sheet of ACE Insurance and its Consolidated
Subsidiaries as of September 30, 1996 and the related consolidated statements of
operations and retained earnings and of cash flows for the fiscal year then
ended, all reported on by Coopers & Lybrand LLP, copies of which have been
delivered to each of the Banks, fairly present, in all material respects, in
conformity with generally accepted accounting principles, the consolidated
financial position of ACE Insurance and its Consolidated Subsidiaries as of such

                                       28
<PAGE>
 
date and their consolidated results of operations and retained earnings and cash
flows for such fiscal year.

     (e) Since September 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of ACE Insurance and
its Consolidated Subsidiaries, considered as a whole.

     (f) The balance sheet of CODA as of September 30, 1996 and the related
statements of operations and retained earnings and of cash flows for the fiscal
year then ended, all reported on by Coopers & Lybrand LLP, copies of which have
been delivered to each of the Banks, fairly present, in all material respects,
in conformity with generally accepted accounting principles, the financial
position of CODA as of such date and its results of operations and retained
earnings and cash flows for such fiscal year.

     (g) Since September 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of CODA.

     (h) The balance sheet of Tempest as of November 30, 1996 and the related
statements of operations and retained earnings and of cash flows for the fiscal
year then ended, all reported on by Coopers & Lybrand LLP, copies of which have
been delivered to each of the Banks, fairly present, in all material respects,
in conformity with generally accepted accounting principles, the financial
position of Tempest as of such date and its results of operations and retained
earnings and cash flows for such fiscal year.

     (i) Since November 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of Tempest.

     Section 4.05.  Litigation.  Except as disclosed in the notes to the
financial statements referred to in Section 4.04(a), there is no action, suit or
proceeding pending against, or to the knowledge of the Borrower threatened
against or affecting, the Borrower or any of its Subsidiaries before any court
or arbitrator or any governmental body, agency or official in which there is a
reasonable likelihood of an adverse decision which could materially adversely
affect the business, consolidated financial position or consolidated results of
operations of the Borrower and its Consolidated Subsidiaries, considered as a
whole, or which in any manner draws into question the validity of this Agreement
or the Notes.

     Section 4.06.  ERISA.  Neither the Borrower, nor any Guarantor, nor any
member of their respective ERISA Groups, maintains or contributes to, or has
within the previous six years (whether or not while a member of such Person's
current ERISA Group) maintained or contributed to, or been required to maintain

                                       29
<PAGE>
 
or been jointly and severally liable for contributions to, or liability upon
withdrawal from, any plan or arrangement subject to (i) the minimum funding
standards of ERISA and the Internal Revenue Code, (ii) Part 3 of Subtitle B of
Title I of ERISA or (iii) Title IV of ERISA.

     Section 4.07.  Taxes.  The Borrower and its Subsidiaries have filed all
income tax returns and all other material tax returns which are required to be
filed by them and have paid all taxes due pursuant to such returns or pursuant
to any assessment received by the Borrower or any Subsidiary.  The charges,
accruals and reserves on the books of the Borrower and its Subsidiaries in
respect of taxes or other governmental charges are, in the opinion of the
Borrower, adequate.

     Section 4.08.  Not an Investment Company.  No Obligor is an "INVESTMENT
COMPANY" within the meaning of the Investment Company Act of 1940, as amended.

     Section 4.09.  Full Disclosure.  All written information heretofore
furnished by the Obligors to the Administrative Agent or any Bank for purposes
of or in connection with this Agreement or any transaction contemplated hereby
is, and all such information hereafter furnished by the Borrower to the
Administrative Agent or any Bank will be, true and accurate in all material
respects on the date as of which such information is stated or certified.  The
Borrower has disclosed to the Banks in writing any and all facts which
materially and adversely affect or may affect (to the extent the Obligors can
now reasonably foresee) the business, operations or financial condition of any
Obligor and its Consolidated Subsidiaries, taken as a whole, or the ability of
any Obligor to perform its obligations under this Agreement.

     Section 4.10.  Compliance with Laws.  The Borrower and each Subsidiary are
in compliance, in all material respects, with all applicable laws, ordinances,
rules, regulations, guidelines and other requirements of governmental
authorities except where the necessity of compliance therewith is contested in
good faith by appropriate proceedings and any reserves required under generally
accepted accounting principles with respect thereto have been established and
except where any such failure could not reasonably be expected to materially
adversely affect the business, consolidated financial position or consolidated
results of operations of the Borrower and its Consolidated Subsidiaries,
considered as a whole.

                                       30
<PAGE>
 
                                   ARTICLE 5

                                   Covenants

     The Borrower agrees that, so long as any Bank has any Commitment hereunder
or any amount payable under any Note remains unpaid:

     Section 5.01. Information. The Borrower will deliver to each of the Banks:

     (a) as soon as available and in any event within 90 days after the end of
each fiscal year of the Borrower, a consolidated balance sheet of the Borrower
and its Consolidated Subsidiaries as of the end of such fiscal year and the
related consolidated statements of operations, shareholders' equity and cash
flows for such fiscal year, setting forth in each case in comparative form the
figures for the previous fiscal year, all reported on in a manner acceptable to
the Securities and Exchange Commission or otherwise reasonably acceptable to the
Required Banks by Coopers & Lybrand LLP or other independent public accountants
of nationally recognized standing;

     (b) as soon as available and in any event within 45 days after the end of
each of the first three quarters of each fiscal year of the Borrower, a
consolidated balance sheet of the Borrower and its Consolidated Subsidiaries as
of the end of such quarter and the related consolidated statements of operations
and cash flows for such quarter and for the portion of the Borrower's fiscal
year ended at the end of such quarter, setting forth in the case of such
statements of operations and cash flows in comparative form the figures for the
corresponding quarter and the corresponding portion of the Borrower's previous
fiscal year, all certified (subject to normal year-end adjustments) as to
fairness of presentation, generally accepted accounting principles and
consistency by the chief financial officer or the chief accounting officer of
the Borrower;

     (c) simultaneously with the delivery of each set of financial statements
referred to in clauses (a) and (b) above, a certificate of the chief financial
officer or the chief accounting officer of the Borrower (i) setting forth in
reasonable detail the calculations required to establish whether the Borrower
was in compliance with the requirements of Sections 5.07 to 5.10, inclusive, on
the date of such financial statements and (ii) stating whether any Default
exists on the date of such certificate and, if any Default then exists, setting
forth the details thereof and the action which the Borrower is taking or
proposes to take with respect thereto;

     (d) within five days after any executive officer of the Borrower obtains
knowledge of any Default, if such Default is then continuing, a certificate of
the chief financial officer or the chief accounting officer of the Borrower
setting forth

                                       31
<PAGE>
 
the details thereof and the action which the Borrower is taking or proposes to
take with respect thereto;

     (e) promptly upon the mailing thereof to the shareholders of the Borrower
generally, copies of all financial statements, reports and proxy statements so
mailed;

     (f) promptly upon the filing thereof, copies of all registration statements
(other than the exhibits thereto and any registration statements on Form S-8 or
its equivalent) and reports on Forms 10-K, 10-Q and 8-K (or their equivalents)
which the Borrower shall have filed with the Securities and Exchange Commission;

     (g) as soon as available and in any event within 20 days after submission,
each statutory statement of the Guarantors (or any of them) in the form
submitted to The Insurance Division of the Office of Registrar of Companies of
Bermuda;

     (h) as soon as available and in any event within 120 days after the end of
each fiscal year of each Guarantor, a consolidated balance sheet of each
Guarantor and its Subsidiaries (if any) as of the end of such fiscal year and
the related statements of income and changes in financial position for such
fiscal year, setting forth in each case in comparative form the figures for the
previous fiscal year, all reported on by the independent public accountants
which reported on the financial statements referred to in clause (a) above;

     (i) promptly after any executive officer of the Borrower obtains knowledge
thereof, (i) a copy of any notice from the Minister of Finance or the Registrar
of Companies or any other Person of the revocation, the suspension or the
placing of any restriction or condition on the registration as an insurer of any
Guarantor under the Bermuda Insurance Law or of the institution of any
proceeding or investigation which could result in any such revocation,
suspension or placing of such a restriction or condition, (ii) copies of any
correspondence by, to or concerning any Guarantor relating to an investigation
conducted by the Minister of Finance, whether pursuant to Section 132 of the
Bermuda Companies Law or otherwise and (iii) a copy of any notice of or
requesting or otherwise relating to the winding up or any similar proceeding of
or with respect to either Guarantor; and

     (j) from time to time such additional information regarding the financial
position, results of operations or business of the Borrower or any of its
Subsidiaries as the Administrative Agent, at the request of any Bank, may
reasonably request from time to time.

                                       32
<PAGE>
 
     Section 5.02.  Payment of Obligations.  The Borrower will pay and
discharge, and will cause each Subsidiary to pay and discharge, at or before
maturity, all their respective material obligations and liabilities, including,
without limitation, tax liabilities, except where the same may be contested in
good faith by appropriate proceedings, and will maintain, and will cause each
Subsidiary to maintain, in accordance with generally accepted accounting
principles, appropriate reserves for the accrual of any of the same.

     Section 5.03.  Maintenance of Property; Insurance.  (a) The Borrower will
keep, and will cause each Subsidiary to keep, all property useful and necessary
in its business in good working order and condition, ordinary wear and tear
excepted.

     (b) The Borrower will maintain, and will cause each Subsidiary to maintain,
physical damage insurance on all real and personal property on an all risks
basis (including the perils of flood and quake), covering the repair and
replacement cost of all such property and consequential loss coverage for
business interruption and extra expense.  The Borrower will deliver to the Banks
upon request of any Bank through the Administrative Agent from time to time,
full information as to the insurance carried.

     Section 5.04.  Conduct of Business and Maintenance of Existence.  The
Borrower will continue, and will cause each Subsidiary to continue, to engage in
business of the same general type as now conducted by the Borrower and its
Subsidiaries, and will preserve, renew and keep in full force and effect, and
will cause each Subsidiary to preserve, renew and keep in full force and effect,
their respective existence and their respective rights, privileges and
franchises necessary or desirable in the normal conduct of business; provided
that nothing in this Section 5.04 shall prohibit (i) the merger of a Subsidiary
(other than a Guarantor) into the Borrower or the merger or consolidation of a
Subsidiary (other than a Guarantor) with or into another Person if the
corporation surviving such consolidation or merger is a Subsidiary and if, in
each case, after giving effect thereto, no Default shall have occurred and be
continuing, (ii) any merger of an Obligor permitted by Section 5.11 or (iii) the
termination of the corporate existence of any Subsidiary (other than a
Guarantor) if the Borrower in good faith determines that such termination is in
the best interest of the Borrower and is not materially disadvantageous to the
Banks.

     Section 5.05.  Compliance with Laws.  The Borrower will comply, and cause
each Subsidiary to comply, in all material respects with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally

                                       33
<PAGE>
 
accepted accounting principles with respect thereto have been established and
except where any such failure could not reasonably be expected to materially
adversely affect the business, consolidated financial position or consolidated
results of operations of the Borrower and its Consolidated Subsidiaries,
considered as a whole.

     Section 5.06.  Inspection of Property, Book and Records.  The Borrower will
keep, and will cause each Subsidiary to keep, proper books of record and account
in accordance with generally accepted accounting principles in which full, true
and correct entries shall be made of all dealings and transactions in relation
to its business and activities; and will permit, and will cause each Subsidiary
to permit, representatives of any Bank at such Bank's expense to visit and
inspect any of their respective properties, to examine and make abstracts from
any of their respective books and records and to discuss their respective
affairs, finances and accounts with their respective officers, employees and
independent public accountants, all at such reasonable times and as often as may
reasonably be desired.

     Section 5.07.  Leverage.  Consolidated Debt will at no time exceed 35% of
Consolidated Tangible Net Worth.

     Section 5.08.  Subsidiary Debt.  The Borrower will not permit any of its
Subsidiaries to create, assume or suffer to exist any Debt, except (i) Debt
under the Related Documents, (ii) Debt owing to the Borrower or a Wholly-Owned
Consolidated Subsidiary,  (iii) Debt of Tripar Partnership, a Bermuda general
partnership, owing to other Subsidiaries or Debt of such other Subsidiaries
owing to Tripar Partnership, (iv) Debt in respect of letters of credit issued in
the ordinary course of business, (v) Debt created by exercise of overdraft
privileges on a basis not more frequent than once each calendar month for not
more than five Euro-Dollar Business Days in an amount not to exceed $50,000,000
in the aggregate at any one time, (vi) subordinated Debt of ACE US owing to ACE
Insurance, (vii) Debt in an amount not to exceed $70,000,000 incurred in
connection with the development by the Borrower and/or any of its Subsidiaries
of the "Bermudiana Site" in Hamilton, Bermuda, and (viii) Debt not permitted by
the foregoing clauses of this Section in an aggregate principal amount not to
exceed $20,000,000 at any time outstanding.

     Section 5.09.  Minimum Tangible Net Worth.  Consolidated Tangible Net Worth
will at no time be less than (i) $1,400,000,000 plus (ii) 25% of Consolidated
Net Income for each fiscal quarter of the Borrower ended after December 31, 1997
and on or prior to such date of determination and for which such Consolidated
Net Income is positive (but with no deduction on account of any fiscal quarter
for which Consolidated Net Income is negative) plus (iii) 50%

                                       34
<PAGE>
 
of the aggregate amount by which Consolidated Tangible Net Worth shall have been
increased by reason of the issuance and sale after the Effective Date and on or
prior to such date of determination of any capital stock or the conversion or
exchange of any Debt of the Borrower into or with capital stock of the Borrower
consummated after the Effective Date and on or prior to such date of
determination.

     Section 5.10.  Negative Pledge.  Neither the Borrower nor any Subsidiary
will create, assume or suffer to exist any Lien on any asset now owned or
hereafter acquired by it, except:

     (a) Liens existing on the date of this Agreement securing Debt outstanding
on the date of this Agreement in an aggregate principal or face amount not
exceeding $25,000,000;

     (b) any Lien existing on any asset of any corporation at the time such
corporation becomes a Subsidiary and not created in contemplation of such event;

     (c) any Lien on any asset securing Debt incurred or assumed for the purpose
of financing all or any part of the cost of acquiring such asset, provided that
such Lien attaches to such asset concurrently with or within 90 days after the
acquisition thereof;

     (d) any Lien on any asset of any corporation existing at the time such
corporation is merged or consolidated with or into the Borrower or a Subsidiary
and not created in contemplation of such event;

     (e) any Lien existing on any asset prior to the acquisition thereof by the
Borrower or a Subsidiary and not created in contemplation of such acquisition;

     (f) any Lien arising out of the refinancing, extension, renewal or
refunding of any Debt secured by any Lien permitted by any of the foregoing
clauses of this Section, provided that such Debt is not increased and is not
secured by any additional assets;

     (g) Liens arising in the ordinary course of its business which (i) do not
secure Debt or Derivatives Obligations, (ii) do not secure any obligation in an
amount exceeding $25,000,000 and (iii) do not in the aggregate materially
detract from the value of its assets or materially impair the use thereof in the
operation of its business;

                                       35
<PAGE>
 
     (h) Liens on cash and cash equivalents securing Derivatives Obligations,
provided that the aggregate amount of cash and cash equivalents subject to such
Liens may at no time exceed $25,000,000;

     (i) Liens securing obligations in respect of letters of credit issued
pursuant to any of the Related Documents; and

     (j) Liens not otherwise permitted by the foregoing clauses of this Section
securing Debt in an aggregate principal or face amount at any date not to exceed
10% of Consolidated Tangible Net Worth.

     Section 5.11.  Consolidations, Mergers and Sales of Assets.  No Obligor
will (i) consolidate with or merge into any other Person or (ii) sell, lease or
otherwise transfer, directly or indirectly, all or any substantial part of its
assets to any other Person; provided that if both immediately before and after
giving effect thereto no Default shall have occurred and be continuing, then (A)
any Guarantor may merge or consolidate with any other Person so long as the
surviving entity is the Guarantor or a Wholly-Owned Consolidated Subsidiary and,
if such Guarantor is not the surviving entity, such surviving entity shall have
assumed the obligations of such Guarantor hereunder pursuant to an instrument in
form and substance reasonably satisfactory to the Required Banks and shall have
delivered such opinions of counsel with respect thereto as the Administrative
Agent may reasonably request and (B) the Borrower may merge with another Person
so long as the Borrower is the surviving entity.

     Section 5.12.  Use of Proceeds.  The proceeds of the Loans made under this
Agreement will be used by the Borrower for its general corporate purposes. None
of such proceeds will be used, directly or indirectly, for the purpose, whether
immediate, incidental or ultimate, of buying or carrying any "MARGIN STOCK"
within the meaning of Regulation U.

     Section 5.13.  ERISA.  Neither the Borrower, nor any Guarantor, nor any
member of their respective ERISA Groups will maintain or contribute to, or
become obligated to maintain or become jointly and severally liable for
contributions to, or have liability upon withdrawal from, any plan or
arrangement subject to (i) the minimum funding standards of ERISA and the
Internal Revenue Code, (ii) Part 3 of Subtitle B of Title I of ERISA or (iii)
Title IV of ERISA.

                                       36
<PAGE>
 
                                   ARTICLE 6

                                   Defaults

     Section 6.01.  Events of Default. If one or more of the following events
("EVENTS OF DEFAULT") shall have occurred and be continuing:

     (a) the Borrower shall fail to pay when due any principal of any Loan or
shall fail to pay within five Business Days of the due date thereof any interest
on any Loan, any fees or any other amount payable hereunder or any Guarantor
shall fail to pay when due any such principal, interest, fees or other amount
payable hereunder; provided that, for purposes of this Section 6.01(a), no such
payment default by the Borrower shall be continuing if the Guarantors pay the
amount thereof at the time and otherwise in the manner provided in Article 9;

     (b) the Borrower shall fail to observe or perform any covenant contained in
Sections 5.07 through 5.12, inclusive;

     (c) the Borrower shall fail to observe or perform any covenant or agreement
contained in this Agreement (other than those covered by clause (a) or (b)
above) for 30 days after notice thereof has been given to the Borrower by the
Administrative Agent at the request of any Bank;

     (d) any representation, warranty, certification or statement made by any
Obligor in this Agreement or in any certificate, financial statement or other
document delivered pursuant to this Agreement shall prove to have been incorrect
in any material respect when made (or deemed made);

     (e) the Borrower or any Subsidiary shall fail to make any payment in
respect of any Material Financial Obligations when due or within any applicable
grace period;

     (f) any event or condition shall occur which results in the acceleration of
the maturity of any Material Debt or enables (or, with the giving of notice or
lapse of time or both, would enable) the holder of such Debt or any Person
acting on such holder's behalf to accelerate the maturity thereof; or, without
limiting the foregoing, any "Event of Default" (as defined in any of the other
Related Documents) shall occur;

     (g) (i) (x) a resolution or other similar action is passed authorizing the
voluntary winding up of the Borrower or any other similar action with respect to
the Borrower or a petition is filed for the winding up of the Borrower or the
taking of any other similar action with respect to the Borrower in the Grand
Court of the Cayman Islands or (y) any corporate action is taken authorizing the
winding up,

                                       37
<PAGE>
 
the liquidation, any arrangement or the taking of any other similar action of or
with respect to any Guarantor or authorizing any corporate action to be taken to
facilitate any such winding up, liquidation, arrangement or other similar action
or any petition shall be filed seeking the winding up, the liquidation, any
arrangement or the taking of any other similar action of or with respect to any
Guarantor by the Registrar of Companies in Bermuda, one or more holders of
insurance policies or reinsurance certificates issued by any Guarantor or by any
other Person or Persons or any petition shall be presented for the winding up of
any Guarantor to a court of Bermuda as provided under the Bermuda Companies Law
and in either such case such petition shall remain undismissed and unstayed for
a period of 60 days or any creditors' or members' voluntary winding up of any
Guarantor as provided under the Bermuda Companies Law shall be commenced or any
receiver shall be appointed by a creditor of any Guarantor or by a court of
Bermuda on the application of a creditor of any Guarantor as provided under any
instrument giving rights for the appointment of a receiver;

     (ii)   a proceeding shall be commenced by any Person seeking the
rehabilitation, liquidation, dissolution or conservation of the assets of any
Guarantor or any substantial part thereof or any similar remedy and such
proceedings shall remain undismissed and unstayed for a period of 60 days;

     (iii)  the Borrower or any Subsidiary shall commence a voluntary case or
other proceeding seeking liquidation, reorganization or other relief with
respect to itself or its debts under any bankruptcy, insolvency or other similar
law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, or shall consent to any such relief or to the
appointment of or taking possession by any such official in an involuntary case
or other proceeding commenced against it, or shall make a general assignment for
the benefit of creditors, or shall fail generally to pay its debts as they
become due, or shall take any corporate action to authorize any of the
foregoing; or

     (iv)   an involuntary case or other proceeding shall be commenced against
the Borrower or any Subsidiary seeking liquidation, reorganization or other
relief with respect to it or its debts under any bankruptcy, insolvency or other
similar law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 days; or an order for
relief shall be entered against the Borrower or any Subsidiary under the United
States federal bankruptcy laws as now or hereafter in effect;

                                       38
<PAGE>
 
     (h)  a judgment or order for the payment of money in excess of $25,000,000
shall be rendered against the Borrower or any Subsidiary and such judgment or
order shall continue unsatisfied and unstayed for a period of 45 days;

     (i)  any person or group of persons (within the meaning of Section 13 or 14
of the Securities Exchange Act of 1934, as amended) shall have acquired
beneficial ownership (within the meaning of Rule 13d-3 promulgated by the
Securities and Exchange Commission under said Act) of 30% or more of the
outstanding shares of voting stock of the Borrower; or, during any period of 12
consecutive calendar months, individuals who were directors of the Borrower on
the first day of such period shall cease to constitute a majority of the board
of directors of the Borrower; or any Guarantor shall cease to be a Wholly-Owned
Consolidated Subsidiary of the Borrower;

     (j)  any court or arbitrator or any governmental body, agency or official
which has jurisdiction in the matter shall decide, rule or order that any
provision of any of the Financing Documents is invalid or unenforceable in any
material respect, or any Obligor shall so assert in writing; or

     (k)  the registration of any Guarantor as an insurer shall be revoked,
suspended or otherwise have restrictions or conditions placed upon it unless, in
the case of the placing of any such restrictions or conditions, such
restrictions or conditions could not have a material adverse effect on the
interests of the Administrative Agent and the Banks under the Financing
Documents;

then, and in every such event, the Administrative Agent shall (i) if requested
by Banks having more than 50% in aggregate amount of the Commitments, by notice
to the Borrower terminate the Commitments and they shall thereupon terminate,
and (ii) if requested by Banks holding Notes evidencing more than 50% in
aggregate principal amount of the Loans, by notice to the Borrower declare the
Notes (together with accrued interest thereon) to be, and the Notes (together
with accrued interest thereon) shall thereupon become, immediately due and
payable without presentment, demand, protest or other notice of any kind, all of
which are hereby waived by the Obligors; provided that in the case of any of the
Events of Default specified in clause (g) above with respect to any Obligor,
without any notice to any Obligor or any other act by the Administrative Agent
or the Banks, the Commitments shall thereupon terminate and the Notes (together
with accrued interest thereon) shall become immediately due and payable without
presentment, demand, protest or other notice of any kind, all of which are
hereby waived by the Obligors.

                                       39
<PAGE>
 
     Section 6.02.  Notice of Default.  The Administrative Agent shall give
notice to the Borrower under Section 6.01(c) promptly upon being requested to do
so by any Bank and shall thereupon notify all the Banks thereof.

                                   ARTICLE 7

                                  The Agents

     Section 7.01.  Appointment and Authorization.  Each Bank irrevocably
appoints and authorizes the Administrative Agent to take such action as agent on
its behalf and to exercise such powers under the Financing Documents as are
delegated to the Administrative Agent by the terms hereof and thereof, together
with all such powers as are reasonably incidental thereto.

     Section 7.02.  Administrative Agent and Affiliates.  Morgan Guaranty Trust
Company of New York shall have the same rights and powers under this Agreement
as any other Bank and may exercise or refrain from exercising the same as though
it were not the Administrative Agent, and Morgan Guaranty Trust Company of New
York and its affiliates may accept deposits from, lend money to, and generally
engage in any kind of business with the Borrower or any Subsidiary or affiliate
of the Borrower as if it were not the Administrative Agent hereunder.

     Section 7.03.  Action by Administrative Agent.  The obligations of the
Administrative Agent under this Agreement are only those expressly set forth
herein.  Without limiting the generality of the foregoing, the Administrative
Agent shall not be required to take any action with respect to any Default,
except as expressly provided in Article 6.

     Section 7.04.  Consultation with Experts.  The Administrative Agent may
consult with legal counsel (who may be counsel for any Obligor), independent
public accountants and other experts selected by it and shall not be liable for
any action taken or omitted to be taken by it in good faith in accordance with
the advice of such counsel, accountants or experts.

     Section 7.05.  Liability of Administrative Agent.  Neither the
Administrative Agent nor any of its affiliates nor any of their respective
directors, officers, agents or employees shall be liable for any action taken or
not taken by it in connection herewith (i) with the consent or at the request of
the Required Banks (or such different number of Banks as any provision hereof
expressly requires for such consent or request) or (ii) in the absence of its
own gross negligence or willful misconduct.  Neither the Administrative Agent
nor any of its affiliates nor any of their respective directors, officers,
agents or employees shall be responsible

                                       40
<PAGE>
 
for or have any duty to ascertain, inquire into or verify (i) any statement,
warranty or representation made in connection with the Financing Documents or
any borrowing hereunder; (ii) the performance or observance of any of the
covenants or agreements of any Obligor; (iii) the satisfaction of any condition
specified in Article 3, except receipt of items required to be delivered to the
Administrative Agent; or (iv) the validity, effectiveness or genuineness of any
Financing Document or any other instrument or writing furnished in connection
herewith. The Administrative Agent shall not incur any liability by acting in
reliance upon any notice, consent, certificate, statement, or other writing
(which may be a bank wire, telex, facsimile transmission or similar writing)
believed by it to be genuine or to be signed by the proper party or parties.

     Section 7.06.  Indemnification.  Each Bank shall, ratably in accordance
with its Commitment, indemnify the Administrative Agent, its affiliates and
their respective directors, officers, agents and employees (to the extent not
reimbursed by the Obligors) against any cost, expense (including counsel fees
and disbursements), claim, demand, action, loss or liability (except such as
result from such indemnitees' gross negligence or willful misconduct) that such
indemnitees may suffer or incur in such capacity in connection with the
Financing Documents or any action taken or omitted by such indemnitees hereunder
or thereunder.

     Section 7.07.  Credit Decision.  Each Bank acknowledges that it has,
independently and without reliance upon any Agent or any other Bank, and based
on such documents and information as it has deemed appropriate, made its own
credit analysis and decision to enter into this Agreement.  Each Bank also
acknowledges that it will, independently and without reliance upon any Agent or
any other Bank, and based on such documents and information as it shall deem
appropriate at the time, continue to make its own credit decisions in taking or
not taking any action under this Agreement.

     Section 7.08.  Successor Administrative Agent.  The Administrative Agent
may resign at any time by giving notice thereof to the Banks and the Borrower.
Upon any such resignation, the Required Banks shall have the right to appoint a
successor Administrative Agent, which successor Administrative Agent shall be
reasonably acceptable to the Borrower.  If no successor Administrative Agent
shall have been so appointed by the Required Banks, and shall have accepted such
appointment, within 30 days after the retiring Administrative Agent gives notice
of resignation, then the retiring Administrative Agent may, on behalf of the
Banks, appoint a successor Administrative Agent, which shall be a commercial
bank organized or licensed under the laws of the United States of America or of
any State thereof and having a combined capital and surplus of at least
$100,000,000. Upon the acceptance of its appointment as Administrative Agent
hereunder by a successor Administrative Agent, such successor

                                       41
<PAGE>
 
Administrative Agent shall thereupon succeed to and become vested with all the
rights and duties of the retiring Administrative Agent, and the retiring
Administrative Agent shall be discharged from its duties and obligations
hereunder.  After any retiring Administrative Agent's resignation hereunder as
Administrative Agent, the provisions of this Article shall inure to its benefit
as to any actions taken or omitted to be taken by it while it was Administrative
Agent.

     Section 7.09.  Administrative Agent's Fee.  The Borrower shall pay to the
Administrative Agent for its own account fees in the amounts and at the times
previously agreed upon between the Borrower and the Administrative Agent.

     Section 7.10.  Other Agents.  Nothing contained in this Agreement shall be
construed to impose any obligation or duty whatsoever on either Syndication
Agent, on the Documentation Agent, on the Managing Agent or on any Co-Agent in
its capacity as such an Agent.

                                   ARTICLE 8

                            Change in Circumstances

     Section 8.01.  Basis for Determination Interest Rate Inadequate or Unfair.
If on or prior to the first day of any Interest Period for any Fixed Rate
Borrowing:

     (a) the Administrative Agent is advised by the Reference Banks that
deposits in dollars (in the applicable amounts) are not being offered to the
Reference Banks in the London interbank market for such Interest Period, or

     (b) in the case of a Euro-Dollar Borrowing, Banks having 50% or more of the
aggregate amount of the Commitments advise the Administrative Agent that the
London Interbank Offered Rate as determined by the Administrative Agent will not
adequately and fairly reflect the cost to such Banks of funding their Euro-
Dollar Loans for such Interest Period,

     the Administrative Agent shall forthwith give notice thereof to the
Borrower and the Banks, whereupon until the Administrative Agent notifies the
Borrower that the circumstances giving rise to such suspension no longer exist
(i) the obligations of the Banks to make Euro-Dollar Loans, or to continue or
convert outstanding Loans as or into Euro-Dollar Loans, shall be suspended and
(ii) each outstanding Euro-Dollar Loan shall be converted into a Base Rate Loan
on the last day of the then current Interest Period applicable thereto.  Unless
the Borrower notifies the Administrative Agent at least two Domestic Business
Days before the date of any

                                       42
<PAGE>
 
Fixed Rate Borrowing for which a Notice of Borrowing has previously been given
that it elects not to borrow on such date, (i) if such Fixed Rate Borrowing is a
Euro-Dollar Borrowing, such Borrowing shall instead be made as a Base Rate
Borrowing and (ii) if such Fixed Rate Borrowing is a Money Market LIBOR
Borrowing, the Money Market LIBOR Loans comprising such Borrowing shall bear
interest for each day from and including the first day to but excluding the last
day of the Interest Period applicable thereto at the Base Rate for such day.

     Section 8.02.  Illegality.  If, on or after the date of this Agreement, the
adoption of any applicable law, rule or regulation, or any change in any
applicable law, rule or regulation, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by any Bank (or its Euro-Dollar Lending Office) with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency shall make it unlawful or impossible for any Bank (or its
Euro-Dollar Lending Office) to make, maintain or fund its Euro-Dollar Loans and
such Bank shall so notify the Administrative Agent, the Administrative Agent
shall forthwith give notice thereof to the other Banks and the Borrower,
whereupon until such Bank notifies the Borrower and the Administrative Agent
that the circumstances giving rise to such suspension no longer exist, the
obligation of such Bank to make Euro-Dollar Loans, or to continue or convert
outstanding Loans as or into Euro-Dollar Loans, shall be suspended.  Before
giving any notice to the Administrative Agent pursuant to this Section, such
Bank shall designate a different Euro-Dollar Lending Office if such designation
will avoid the need for giving such notice and will not, in the judgment of such
Bank, be otherwise disadvantageous to such Bank.  If such notice is given, each
Euro-Dollar Loan of such Bank then outstanding shall be converted to a Base Rate
Loan either (a) on the last day of the then current Interest Period applicable
to such Euro-Dollar Loan if such Bank may lawfully continue to maintain and fund
such Loan as a Euro-Dollar Loan to such day or (b) immediately if such Bank
shall determine that it may not lawfully continue to maintain and fund such Loan
as a Euro-Dollar Loan to such day.

     Section 8.03.  Increased Cost and Reduced Return.  (a) If on or after (x)
the date hereof, in the case of any Committed Loan or any obligation to make
Committed Loans or (y) the date of the related Money Market Quote, in the case
of any Money Market Loan, the adoption of any applicable law, rule or
regulation, or any change in any applicable law, rule or regulation, or any
change in the interpretation or administration thereof by any governmental
authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by any Bank (or its Applicable Lending
Office) with any request or directive (whether or not having the force of law)
of any such authority,

                                       43
<PAGE>
 
central bank or comparable agency shall impose, modify or deem applicable any
reserve (including, without limitation, any such requirement imposed by the
Board of Governors of the Federal Reserve System, but excluding with respect to
any Euro-Dollar Loan any such requirement with respect to which such Bank is
entitled to compensation during the relevant Interest Period under Section
2.16), special deposit, insurance assessment or similar requirement against
assets of, deposits with or for the account of, or credit extended by, any Bank
(or its Applicable Lending Office) or shall impose on any Bank (or its
Applicable Lending Office) or on the London interbank market any other condition
affecting its Fixed Rate Loans, its Note or its obligation to make Fixed Rate
Loans and the result of any of the foregoing is to increase the cost to such
Bank (or its Applicable Lending Office) of making or maintaining any Fixed Rate
Loan, or to reduce the amount of any sum received or receivable by such Bank (or
its Applicable Lending Office) under this Agreement or under its Note with
respect thereto, by an amount deemed by such Bank to be material, then, within
15 days after demand by such Bank (with a copy to the Administrative Agent), the
Borrower shall pay to such Bank such additional amount or amounts as will
compensate such Bank for such increased cost or reduction.

     (b) If any Bank shall have determined that, after the date hereof, the
adoption of any applicable law, rule or regulation regarding capital adequacy,
or any change in any such law, rule or regulation, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or any request or directive regarding capital adequacy (whether or not
having the force of law) of any such authority, central bank or comparable
agency (including any determination by any such authority, central bank or
comparable agency that, for purposes of capital adequacy requirements, the
Commitments hereunder do not constitute commitments with an original maturity of
one year or less), has or would have the effect of reducing the rate of return
on capital of such Bank (or its Parent) as a consequence of such Bank's
obligations hereunder to a level below that which such Bank (or its Parent)
could have achieved but for such adoption, change, request or directive (taking
into consideration its policies with respect to capital adequacy) by an amount
deemed by such Bank to be material, then from time to time, within 15 days after
demand by such Bank (with a copy to the Administrative Agent), the Borrower
shall pay to such Bank such additional amount or amounts as will compensate such
Bank (or its Parent) for such reduction.

     (c) Each Bank will promptly notify the Borrower and the Administrative
Agent of any event of which it has knowledge, occurring after the date hereof,
which will entitle such Bank to compensation pursuant to this Section and will
designate a different Applicable Lending Office if such designation will avoid
the

                                       44
<PAGE>
 
need for, or reduce the amount of, such compensation and will not, in the
judgment of such Bank, be otherwise disadvantageous to such Bank.  A certificate
of any Bank claiming compensation under this Section and setting forth the
additional amount or amounts to be paid to it hereunder shall be conclusive in
the absence of manifest error.  In determining such amount, such Bank may use
any reasonable averaging and attribution methods.  Notwithstanding the foregoing
subsections  and  of this Section , the Borrower shall only be obligated to
compensate any Bank for any amount arising or accruing during (i) any time or
period commencing not more than 180 days prior to the date on which such Bank
notifies the Administrative Agent and the Borrower that it proposes to demand
such compensation and identifies to the Administrative Agent and the Borrower
the statute, regulation or other basis upon which the claimed compensation is or
will be based and (ii) any time or period during which because of the
retroactive application of such statute, regulation or other such basis, such
Bank did not know in good faith that such amount would arise or accrue.

     Section 8.04.  Taxes.  (a) Any and all payments by any Obligor hereunder
shall be made free and clear of and without deduction for any and all present or
future taxes, levies, imposts, deductions, charges or withholdings, and all
penalties, interest, expenses and similar liabilities with respect thereto,
excluding (i) in the case of each Bank and the Administrative Agent, taxes
imposed on its income, and franchise and similar taxes imposed on it, by the
jurisdiction under the laws of which such Bank or the Administrative Agent, as
the case may be, shall be organized or any political subdivision thereof, (ii)
in the case of each Bank, taxes imposed on its income, and franchise and similar
taxes imposed on it, by the jurisdiction of such Bank's Applicable Lending
Office or any political subdivision thereof or in which such Bank's principal
executive office is located or any political subdivision thereof and (iii) any
Taxes imposed as a result of a change of such Bank's Applicable Lending Office
to the extent such Taxes would not have been imposed absent such change;
provided however, that (x) a change in such Bank's Applicable Lending Office to
which the Obligor has consented and (y) a change in such Bank's Applicable
Lending Office as a result of legal or regulatory restrictions shall not
constitute a change for the purposes of this Section 8.04 (all such non-excluded
taxes, levies, imposts, deductions, charges, withholdings and liabilities being
hereinafter referred to as "TAXES").  Each Obligor agrees that, if any Obligor
shall be required by law to deduct any Taxes from or in respect of any sum
payable hereunder to any Bank or the Administrative Agent, (A) the sum payable
to such Bank or the Administrative Agent shall be increased as may be necessary
so that after making all required deductions for Taxes (including deductions
applicable to additional sums payable under this Section 8.04), such Bank or the
Administrative Agent, as the case may be, shall receive an amount equal to the
sum it would have received had no such deductions been made, (B) such Obligor
shall make such deductions and (C) such

                                       45
<PAGE>
 
Obligor shall pay the full amount deducted to the relevant taxing authority or
other authority in accordance with applicable law.

     (b) In addition, each Obligor agrees to pay any present or future stamp or
documentary taxes or any other excise or property taxes, charges or similar
levies which shall arise from any payment made under, or from the execution,
delivery or registration of, or otherwise with respect to, this Agreement or any
Note (all such taxes, charges or levies being hereinafter referred to as "OTHER
TAXES").

     (c) Each Obligor agrees to indemnify each Bank and the Administrative Agent
for the full amount of Taxes or Other Taxes (including any Taxes or Other Taxes
imposed on amounts payable under this Section 8.04) paid by such Bank or the
Administrative Agent or any penalties, interest, expenses and similar
liabilities arising therefrom or with respect thereto, whether or not such Taxes
or Other Taxes were correctly or legally asserted provided that such Bank has
acted in good faith with respect to such Taxes or Other Taxes and that such Bank
reasonably cooperates with the Obligors in challenging such Taxes or Other
Taxes.  Each indemnification under this paragraph (c) shall be made within 30
days from the date such Bank or the Administrative Agent makes demand therefor.

     (d) Each Bank shall use reasonable efforts (consistent with legal and
regulatory restrictions) (x) to file any certificate or document or to furnish
any information as reasonably requested by any Obligor pursuant to any
applicable treaty, law, rule or regulation or (y) to designate a different
Lending Office if the making of such a filing, the furnishing of such
information or the designation of such other Lending Office would avoid the need
for or reduce the amount of any additional amounts payable by any Obligor
pursuant to this Section 8.04 and would not, in the reasonable judgment of such
Bank, be disadvantageous to such Bank.  Notwithstanding the foregoing, it is
understood and agreed that nothing in this Section 8.04 shall interfere with the
rights of any Bank to conduct its fiscal or tax affairs in such manner as it
deems fit.

     (e) Within 90 days after the date of any payment of Taxes, the Obligors
will furnish to the Administrative Agent notarized copies for each Bank of the
original receipt evidencing payment thereof.  If no Taxes shall be payable in
respect of any payment under this Agreement, the Obligors will, upon the
reasonable request of the Administrative Agent, furnish to the Administrative
Agent a certificate in form reasonably acceptable to the Administrative Agent's
counsel confirming that such payment is exempt from or not subject to Taxes.

     (f) For any period with respect to which a Bank has failed to provide the
Obligors with the appropriate form pursuant to Section 8.04(d) (unless such
failure is due to a change in treaty, law or regulation occurring subsequent to
the

                                       46
<PAGE>
 
date on which such form originally was required to be provided), such Bank shall
not be entitled to indemnification under Section 8.04(a) or (b) with respect to
Taxes imposed by the United States; provided that if a Bank, which is otherwise
exempt from or subject to a reduced rate of withholding tax, becomes subject to
Taxes because of its failure to deliver a form required hereunder, the Obligors
shall take such steps as such Bank shall reasonably request to assist such Bank
to recover such Taxes.

     Section 8.05.  Base Rate Loans Substituted for Affected Fixed Rate Loans.
If (i) the obligation of any Bank to make or to continue or convert outstanding
Loans as or to Euro-Dollar Loans has been suspended pursuant to Section 8.02 or
(ii) any Bank has demanded compensation under Section 8.03 or 8.04 with respect
to its Euro-Dollar Loans and the Borrower shall, by at least five Euro-Dollar
Business Days' prior notice to such Bank through the Administrative Agent, have
elected that the provisions of this Section shall apply to such Bank, then,
unless and until such Bank notifies the Borrower that the circumstances giving
rise to such suspension or demand for compensation no longer exist:

     (a) all Loans which would otherwise be made by such Bank as (or continued
as or converted to) Euro-Dollar Loans shall instead be Base Rate Loans (on which
interest and principal shall be payable contemporaneously with the related Euro-
Dollar Loans of the other Banks), and

     (b) after each of its Euro-Dollar Loans has been repaid (or converted), all
payments of principal which would otherwise be applied to repay such Euro-Dollar
Loans shall be applied to repay its Base Rate Loans instead.

If such Bank notifies the Borrower that the circumstances giving rise to such
suspension or demand for compensation no longer exist, the principal amount of
each such Base Rate Loan shall be converted into a Euro-Dollar Loan on the first
day of the next succeeding Interest Period applicable to the related Euro-Dollar
Loans of the other Banks.

     Section 8.06.  Substitution of Bank.  If (i) the obligation of any Bank to
make or to convert or continue outstanding Loans as or into Euro-Dollar Loans
has been suspended pursuant to Section 8.02 or (ii) any Bank has demanded
compensation under Section 8.03 or 8.04, the Borrower shall have the right, with
the assistance of the Administrative Agent, to designate a substitute bank or
banks (which may be one or more of the Banks) mutually satisfactory to the
Borrower, the Administrative Agent (whose consent shall not be unreasonably
withheld) and the issuing banks under the Related Documents to purchase for
cash, pursuant to an Assignment and Assumption Agreement in substantially the
form of Exhibit I hereto, the outstanding loans of such Bank and assume the
commitment and letter

                                       47
<PAGE>
 
of credit liabilities of such Bank (and its affiliates) under each of the
Related Documents, without recourse to or warranty by, or expense to, such Bank,
for a purchase price equal to the principal amount of all of such Bank's
outstanding loans and funded letter of credit liabilities plus any accrued but
unpaid interest thereon and the accrued but unpaid fees in respect of such
Bank's commitments and letter of credit liabilities plus such amount, if any, as
would be payable pursuant to the funding loss indemnities in the Related
Documents if the outstanding loans of such Bank were prepaid in their entirety
on the date of consummation of such assignment.

                                   ARTICLE 9

                                   Guaranty

     Section 9.01.  The Guaranty.  Each Guarantor hereby unconditionally,
jointly and severally, absolutely and irrevocably guarantees the full and
punctual payment (whether at stated maturity, upon acceleration or otherwise) of
all amounts payable by the Borrower under the Financing Documents including,
without limitation, the principal of and interest on each Note issued by the
Borrower pursuant to this Agreement.  Upon failure by the Borrower to pay
punctually any such amount, each Guarantor shall forthwith on demand pay the
amount not so paid at the place and in the manner specified in this Agreement.

     Section 9.02.  Guaranty Unconditional.  The obligations of each Guarantor
hereunder shall be unconditional, absolute and irrevocable and, without limiting
the generality of the foregoing, shall not be released, discharged or otherwise
affected by:

     (a) any extension, renewal, settlement, compromise, waiver or release in
respect of any obligation of any other Obligor under any of the Financing
Documents, by operation of law or otherwise;

     (b) any modification or amendment of or supplement to any of the Financing
Documents;

     (c) any release, non-perfection or invalidity of any direct or indirect
security for any obligation of any other Obligor under any of the Financing
Documents;

     (d) any change in the corporate existence, structure or ownership of any
Obligor, or any insolvency, bankruptcy, reorganization or other similar
proceeding

                                       48
<PAGE>
 
affecting any other Obligor or its assets or any resulting release or discharge
of any obligation of any other Obligor contained in any of the Financing
Documents;

     (e) the existence of any claim, set-off or other rights which any Obligor
may have at any time against any other Obligor, the Administrative Agent, any
Bank or any other corporation or person, whether in connection with any of the
Financing Documents or any unrelated transactions, provided that nothing herein
shall prevent the assertion of any such claim by separate suit or compulsory
counterclaim;

     (f) any invalidity or unenforceability relating to or against any other
Obligor for any reason of any of the Financing Documents, or any provision of
applicable law or regulation purporting to prohibit the payment by any other
Obligor of the principal of or interest on any Note or any other amount payable
under any of the Financing Documents; or

     (g) any other act or omission to act or delay of any kind by any Obligor,
the Administrative Agent, any Bank or any other corporation or person or any
other circumstance whatsoever which might, but for the provisions of this
paragraph, constitute a legal or equitable discharge of or defense to any
Guarantor's obligations hereunder.

     Section 9.03.  Discharge Only upon Payment in Full; Reinstatement in
Certain Circumstances.  Each Guarantor's obligations hereunder shall remain in
full force and effect until the Commitments shall have terminated and the
principal of and interest on the Notes and all other amounts payable by the
Borrower under the Financing Documents shall have been paid in full.  If at any
time any payment of the principal of or interest on any Note or any other amount
payable by the Borrower under the Financing Documents is rescinded or must be
otherwise restored or returned upon the insolvency, bankruptcy or reorganization
of the Borrower or otherwise, each Guarantor's obligations hereunder with
respect to such payment shall be reinstated as though such payment had been due
but not made at such time.

     Section 9.04.  Waiver by Each of the Guarantors.  Each Guarantor
irrevocably waives acceptance hereof, presentment, demand, protest and any
notice not provided for herein, as well as any requirement that at any time any
action be taken by any corporation or person against any other Obligor or any
other corporation or person.

     Section 9.05.  Subrogation.  Upon the making by any Guarantor of any
payment hereunder, such Guarantor shall be subrogated to the rights of the payee
against the Borrower with respect to such payment; provided that such Guarantor

                                       49
<PAGE>
 
shall not enforce any right to receive any payment by way of subrogation until
all amounts of principal of and interest on the Loans and all other amounts
payable by the Borrower under this Agreement shall have been paid in full and
the Commitments shall have terminated.

     Section 9.06.  Stay of Acceleration.  If acceleration of the time for
payment of any amount payable by the Borrower under any of the Financing
Documents is stayed upon the insolvency, bankruptcy or reorganization of the
Borrower, all such amounts otherwise subject to acceleration under the terms of
this Agreement shall nonetheless be payable by each Guarantor hereunder
forthwith on demand by the Administrative Agent made at the request of the
requisite proportion of the Banks specified in Article 6.

     Section 9.07.  Limit of Liability.  The obligations of each Guarantor
hereunder shall be limited to an aggregate amount equal to the largest amount
that would not render its obligations hereunder subject to avoidance under any
applicable bankruptcy, insolvency or similar law.

                                  ARTICLE 10

                                 Miscellaneous

     Section 10.01.  Notices.  All notices, requests and other communications to
any party hereunder shall be in writing (including bank wire, telex, facsimile
transmission or similar writing) and shall be given to such party:  (x) in the
case of any Obligor or the Administrative Agent, at its address, facsimile
number or telex number set forth on the signature pages hereof, (y) in the case
of any Bank, at its address, facsimile number or telex number set forth in its
Administrative Questionnaire or (z) in the case of any party, such other
address, facsimile number or telex number as such party may hereafter specify
for the purpose by notice to the Administrative Agent and the Borrower.  Each
such notice, request or other communication shall be effective (i) if given by
telex, when such telex is transmitted to the telex number specified in this
Section and the appropriate answerback is received, (ii) if given by facsimile
transmission, when transmitted to the facsimile number specified in this Section
and confirmation of receipt is received, (iii) if given by mail, 10 days after
such communication is deposited in the mails with first class postage prepaid,
addressed as aforesaid or (iv) if given by any other means, when delivered at
the address specified in this Section; provided that notices to the
Administrative Agent under Article 2 or Article 8 shall not be effective until
received.

     Section 10.02.  No Waivers.  No failure or delay by the Administrative
Agent or any Bank in exercising any right, power or privilege under any
Financing Document shall operate as a waiver thereof nor shall any single or
partial exercise

                                       50
<PAGE>
 
thereof preclude any other or further exercise thereof or the exercise of any
other right, power or privilege.  The rights and remedies provided in the
Financing Documents shall be cumulative and not exclusive of any rights or
remedies provided by law.

     Section 10.03.  Expenses; Indemnification.  (a) The Borrower shall pay (i)
all out-of-pocket expenses of the Administrative Agent, including fees and
disbursements of Davis Polk & Wardwell, special counsel for the Agents,
reasonably incurred in connection with the preparation of the Financing
Documents, any waiver or consent hereunder or thereunder or any amendment hereof
or thereof or any Default or alleged Default hereunder or thereunder and (ii) if
an Event of Default occurs, all out-of-pocket expenses incurred by the
Administrative Agent and each Bank, including (without duplication) the fees and
disbursements of outside counsel and the allocated cost of inside counsel, in
connection with such Event of Default and collection, bankruptcy, insolvency and
other enforcement proceedings resulting therefrom.

     (b) The Borrower agrees to indemnify the Administrative Agent and each
Bank, their respective affiliates and the respective directors, officers, agents
and employees of the foregoing (each an "INDEMNITEE") and hold each Indemnitee
harmless from and against any and all liabilities, losses, damages, costs and
expenses of any kind, including, without limitation, the reasonable fees and
disbursements of counsel, which may be reasonably incurred by such Indemnitee in
connection with any investigative, administrative or judicial proceeding
(whether or not such Indemnitee shall be designated a party thereto) brought or
threatened relating to or arising out of the Financing Documents or any actual
or proposed use of proceeds of Loans; provided that no Indemnitee shall have the
right to be indemnified hereunder for such Indemnitee's own gross negligence or
willful misconduct as determined by a court of competent jurisdiction.

     Section 10.04.  Sharing; Set-Offs.  (a) Each Bank agrees that if it shall,
by exercising any right of set-off or counterclaim or otherwise, receive payment
of a proportion of the aggregate amount of principal and interest due with
respect to any Note held by it which is greater than the proportion received by
any other Bank in respect of the aggregate amount of principal and interest due
with respect to any Note held by such other Bank, the Bank receiving such
proportionately greater payment shall purchase such participations in the Notes
held by the other Banks, and such other adjustments shall be made, as may be
required so that all such payments of principal and interest with respect to the
Notes held by the Banks shall be shared by the Banks pro rata; provided that
nothing in this Section shall impair the right of any Bank to exercise any right
of set-off or counterclaim it may have and to apply the amount subject to such
exercise to the payment of indebtedness of any Obligor other than its
indebtedness hereunder.  Each Obligor

                                       51
<PAGE>
 
agrees, to the fullest extent it may effectively do so under applicable law,
that any holder of a participation in a Note, whether or not acquired pursuant
to the foregoing arrangements, may exercise rights of set-off or counterclaim
and other rights with respect to such participation as fully as if such holder
of a participation were a direct creditor of such Obligor in the amount of such
participation.

     (b) Upon (i) the occurrence and during the continuance of any Event of
Default and (ii) the making of the request specified by Section 6.01 to
Administrative Agent to declare the Notes due and payable pursuant to the
provisions of Section 6.01, each Bank and each of its affiliates is hereby
authorized at any time and from time to time, to the fullest extent permitted by
law, to set off and otherwise apply any and all deposits (general or special,
time or demand, provisional or final) at any time held and other indebtedness at
any time owing by such Bank or such affiliate to or for the credit or the
account of any Obligor against any and all of the obligations of such Obligor to
such Bank now or hereafter existing under the Financing Documents, irrespective
of whether such Bank shall have made any demand for payment thereof and although
such obligations may be unmatured.  Each Bank agrees promptly to notify such
Obligor after any such setoff and application; provided, however, that the
                                               --------  -------          
failure to give such notice shall not affect the validity of such setoff and
application.  The rights of each Bank and its affiliates under this Section are
in addition to other rights and remedies (including, without limitation, other
rights of setoff) that such Bank and its affiliates may have.

     Section 10.05.  Amendments and Waivers.  Any provision of this Agreement or
the Notes may be amended or waived if, but only if, such amendment or waiver is
in writing and is signed by the Obligors and the Required Banks (and, if the
rights or duties of the Administrative Agent are affected thereby, by the
Administrative Agent); provided that no such amendment or waiver shall, unless
signed by all the Banks, (i) increase or decrease the Commitment of any Bank
(except for a ratable decrease in the Commitments of all Banks) or subject any
Bank to any additional obligation, (ii) reduce the principal of or rate of
interest on any Loan or any fees hereunder, (iii) postpone the date fixed for
any payment of principal of or interest on any Loan or any fees hereunder or for
any reduction or termination of any Commitment, (iv) release any Guarantor
hereunder, (v) change the percentage of the Commitments or of the aggregate
unpaid principal amount of the Notes, or the number of Banks, which shall be
required for the Banks or any of them to take any action under this Section or
any other provision of this Agreement or (vi) amend this Section 10.05.

     Section 10.06.  Successors and Assigns.  (a) The provisions of this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and assigns, except that the Obligors may not
assign or

                                       52
<PAGE>
 
otherwise transfer any of their rights under this Agreement without the prior
written consent of all Banks.

     (b) Any Bank may at any time grant to one or more banks or other
institutions (each a "PARTICIPANT") participating interests in its Commitment or
any or all of its Loans.  In the event of any such grant by a Bank of a
participating interest to a Participant, whether or not upon notice to the
Borrower and the Administrative Agent, such Bank shall remain responsible for
the performance of its obligations hereunder, and the Borrower and the
Administrative Agent shall continue to deal solely and directly with such Bank
in connection with such Bank's rights and obligations under this Agreement.  Any
agreement pursuant to which any Bank may grant such a participating interest
shall provide that such Bank shall retain the sole right and responsibility to
enforce the obligations of the Borrower hereunder including, without limitation,
the right to approve any amendment, modification or waiver of any provision of
this Agreement; provided that such participation agreement may provide that such
Bank will not agree to any modification, amendment or waiver of this Agreement
described in clause (i), (ii), (iii), (iv) or (v) of Section 10.05 without the
consent of the Participant.  The Borrower agrees that each Participant shall, to
the extent provided in its participation agreement and subject to subsection (e)
below, be entitled to the benefits of Article 8 with respect to its
participating interest.  An assignment or other transfer which is not permitted
by subsection (c) or (d) below shall be given effect for purposes of this
Agreement only to the extent of a participating interest granted in accordance
with this subsection (b).

     (c) Any Bank may at any time assign to one or more banks or other
institutions (each an "ASSIGNEE") all, or a proportionate part (equivalent to an
initial participation in the Related Documents of not less than $15,000,000,
unless the Borrower shall otherwise consent or the assignment is for all of the
rights and obligations of the transferor Bank) of all, of its rights and
obligations under this Agreement and the Notes, and such Assignee shall assume
such rights and obligations, pursuant to an Assignment and Assumption Agreement
in substantially the form of Exhibit I hereto executed by such Assignee and such
transferor Bank, with (and subject to) the subscribed consent of the Borrower
and the Administrative Agent which shall not be unreasonably withheld; provided
that if an Assignee is an affiliate of such transferor Bank or was a Bank
immediately prior to such assignment, no such consent of the Borrower or the
Administrative Agent shall be required; and provided further that such
assignment may, but need not, include rights of the transferor Bank in respect
of outstanding Money Market Loans; and provided further that, unless the
Borrower shall otherwise consent or the assignment is for all of the rights and
obligations of the transferor Bank, the participation in the Related Documents
of such transferor Bank after giving effect to such assignment (together with
the participations of its affiliates) shall not be

                                       53
<PAGE>
 
less than $15,000,000; and provided further that such assignment shall be
accompanied by a ratably equivalent assignment of the rights and obligations of
the transferor Bank (and its affiliates) under each of the other Related
Documents. Upon execution and delivery of such instrument and payment by such
Assignee to such transferor Bank of an amount equal to the purchase price agreed
between such transferor Bank and such Assignee, such Assignee shall be a Bank
party to this Agreement and shall have all the rights and obligations of a Bank
with a Commitment as set forth in such instrument of assumption, and the
transferor Bank shall be released from its obligations hereunder to a
corresponding extent, and no further consent or action by any party shall be
required.  Upon the consummation of any assignment pursuant to this subsection
(c), the transferor Bank, the Administrative Agent and the Borrower shall make
appropriate arrangements so that, if required, a new Note is issued to the
Assignee.  In connection with any such assignment, the transferor Bank shall pay
to the Administrative Agent an administrative fee for processing such assignment
in the amount of $2,500.

     (d) Any Bank may at any time assign all or any portion of its rights under
this Agreement and its Note to a Federal Reserve Bank.  No such assignment shall
release the transferor Bank from its obligations hereunder.

     (e) No Assignee, Participant or other transferee of any Bank's rights shall
be entitled to receive any greater payment under Section 8.03 or 8.04 than such
Bank would have been entitled to receive with respect to the rights transferred,
unless such transfer is made with the Borrower's prior written consent or by
reason of the provisions of Section 8.02, 8.03 or 8.04 requiring such Bank to
designate a different Applicable Lending Office under certain circumstances or
at a time when the circumstances giving rise to such greater payment did not
exist.

     Section 10.07.  Collateral.  Each of the Banks represents to the
Administrative Agent and each of the other Banks that it in good faith is not
relying upon any "MARGIN STOCK" (as defined in Regulation U) as collateral in
the extension or maintenance of the credit provided for in this Agreement.

     Section 10.08.  Governing Law.  This Agreement and each Note shall be
governed by and construed in accordance with the laws of the State of New York.

     Section 10.09.  Counterparts; Integration; Effectiveness.  This Agreement
may be signed in any number of counterparts, each of which shall be an original,
with the same effect as if the signatures thereto and hereto were upon the same
instrument.  This Agreement constitutes the entire agreement and understanding
among the parties hereto and supersedes any and all prior agreements and
understandings, oral or written, relating to the subject matter

                                       54
<PAGE>
 
hereof. This Agreement shall become effective upon receipt by the Administrative
Agent of counterparts hereof signed by each of the parties hereto (or, in the
case of any party as to which an executed counterpart shall not have been
received, receipt by the Administrative Agent in form satisfactory to it of
telegraphic, telex, facsimile or other written confirmation from such party of
execution of a counterpart hereof by such party).

     Section 10.10.  Judicial Proceedings.  (a) Consent to Jurisdiction.  Each
Obligor irrevocably submits to the jurisdiction of any federal court sitting in
New York City and, in the event that jurisdiction cannot be obtained or
maintained in a federal court, to the jurisdiction of any New York State court
sitting in New York City over any suit, action or proceeding arising out of or
relating to any of the Financing Documents.  Each Obligor irrevocably waives, to
the fullest extent permitted by law, any objection which it may now or hereafter
have to the laying of the venue of any such suit, action or proceeding brought
in such court and any claim that any suit, action or proceeding brought in such
a court has been brought in an inconvenient forum.  Each Obligor agrees that a
final judgment in any such suit, action or proceeding brought in such a court
shall be conclusive and binding upon it and will be given effect in Bermuda or
the Cayman Islands, as the case may be, to the fullest extent permitted by
applicable law and may be enforced in any federal or New York State court
sitting in New York City (or any other courts to the jurisdiction of which such
Obligor is or may be subject) by a suit upon such judgment, provided that
service of process is effected upon it in one of the manners specified herein or
as otherwise permitted by law.

     (b) Appointment of Agent for Service of Process.  Each Obligor hereby
irrevocably designates and appoints CT Corporation System having an office on
the date hereof at 1633 Broadway, New York, New York 10019 as its authorized
agent, to accept and acknowledge on its behalf, service of any and all process
which may be served in any suit, action or proceeding of the nature referred to
in subsection (a) above in any federal or New York State court sitting in New
York City.  Each Obligor represents and warrants that such agent has agreed in
writing to accept such appointment and that a true copy of such designation and
acceptance has been delivered to the Administrative Agent.  Said designation and
appointment shall be irrevocable until the Commitments shall have terminated and
all principal and interest and all other amounts payable hereunder and under the
Notes shall have been paid in full in accordance with the provisions hereof and
thereof.  If such agent shall cease so to act, each Obligor covenants and agrees
to designate irrevocably and appoint without delay another such agent
satisfactory to the Administrative Agent and to deliver promptly to the
Administrative Agent evidence in writing of such other agent's acceptance of
such appointment.

                                       55
<PAGE>
 
     (c)  Service of Process.  Each Obligor hereby consents to process being
served in any suit, action or proceeding of the nature referred to in subsection
(a) above in any federal or New York State court sitting in New York City by
service of process upon the agent of such Obligor for service of process in such
jurisdiction appointed as provided in subsection (b) above; provided that, to
the extent lawful and possible, notice of said service upon such agent shall be
mailed by registered or certified air mail, postage prepaid, return receipt
requested, to such Obligor at its address specified on the signature page hereof
or to any other address of which such Obligor shall have given written notice to
the Bank.  Each Obligor irrevocably waives, to the fullest extent permitted by
law, all claim of error by reason of any such service in such manner and agrees
that such service shall be deemed in every respect effective service of process
upon such Obligor in any such suit, action or proceeding and shall, to the
fullest extent permitted by law, be taken and held to be valid and personal
service upon and personal delivery to such Obligor.

     (d) No Limitation on Service or Suit.  Nothing in this Section 10.10 shall
affect the right of the Administrative Agent or any Bank to serve process in any
other manner permitted by law or limit the right of the Administrative Agent or
any Bank to bring proceedings against any Obligor in the courts of any
jurisdiction or jurisdictions.

     Section 10.11.  Judgment Currency.  If, under any applicable law and
whether pursuant to a judgment being made or registered against any Obligor or
for any other reason, any payment under or in connection with any of the
Financing Documents is made or satisfied in a currency (the "OTHER CURRENCY")
other than that in which the relevant payment is due (the "REQUIRED CURRENCY")
then, to the extent that the payment (when converted into the Required Currency
at the rate of exchange on the date of payment or, if it is not practicable for
the party entitled thereto (the "PAYEE") to purchase the Required Currency with
the Other Currency on the date of payment, at the rate of exchange as soon
thereafter as it is practicable for it to do so) actually received by the Payee
falls short of the amount due under the terms of this Agreement and the Notes,
each Obligor shall, to the extent permitted by law, as a separate and
independent obligation, indemnify and hold harmless the Payee against the amount
of such short-fall.  For the purpose of this Section, "RATE OF EXCHANGE" means
the rate at which the Payee is able on the relevant date to purchase the
Required Currency with the Other Currency and shall take into account any
premium and other costs of exchange.

     Section 10.12.  WAIVER OF JURY TRIAL.  EACH OF THE OBLIGORS, THE
ADMINISTRATIVE AGENT AND THE BANKS HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT
TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS

                                       56
<PAGE>
 
   AGREEMENT, THE NOTES OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

     Section 10.13.  Existing Credit Agreement.  On the Closing Date and
simultaneously with the closing the Borrower hereby gives notice to Morgan
Guaranty Trust Company of New York, as agent, under Section 2.09 of the Credit
Agreement referred to in clause (x) of Section 3.01 of the termination of the
Commitments (as defined therein) and the Banks hereby waive the requirement that
prior notice of such termination be given as therein provided.

     Section 10.14.  Confidentiality.  The Administrative Agent and each Bank
agrees to keep any information delivered or made available by any Obligor
pursuant to this Agreement confidential from anyone other than persons employed
or retained by such Bank and its affiliates who are engaged in evaluating,
approving, structuring or administering the credit facility contemplated hereby;
provided that nothing herein shall prevent any Bank from disclosing such
information (a) to any other Bank or to the Administrative Agent, (b) subject to
provisions substantially similar to those contained in this Section 10.14, to
any other Person if reasonably incidental to the administration of the credit
facility contemplated hereby, (c) upon the order of any court or administrative
agency, (d) upon the request or demand of any regulatory agency or authority,
(e) which had been publicly disclosed other than as a result of a disclosure by
the Administrative Agent or any Bank prohibited by this Agreement, (f) in
connection with any litigation relating to the Related Documents to which the
Administrative Agent, any Bank or its subsidiaries or Parent may be a party, (g)
to the extent necessary in connection with the exercise of any remedy hereunder,
(h) to such Bank's or Administrative Agent's legal counsel and independent
auditors and (i) subject to provisions substantially similar to those contained
in this Section 10.14, to any actual or proposed Participant or Assignee.
Notwithstanding the foregoing, this Section 10.14 shall not apply to information
that is or becomes publicly available, information that was available to a Bank
on a non-confidential basis prior to its disclosure hereunder and information
which becomes available to a Bank on a non-confidential basis from a source that
is not, to such Bank's knowledge, subject to a confidentiality agreement with
any Obligor.

                                       57
<PAGE>
 
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed by their respective authorized officers as of the day and year first
above written.
                                              ACE LIMITED


                                              By________________________________
                                                Title:
                                              The ACE Building
                                              30 Woodbourne Avenue
                                              Hamilton HM 08, Bermuda
                                              number:3543ACEILBA
                                              Facsimile number: (441) 295-5221

The Common Seal of ACE
Limited was hereunto affixed
in the presence of:

Director

_________________________

Director/Secretary

__________________________

                                       58
<PAGE>
 
                                             A.C.E. INSURANCE COMPANY, LTD.,
                                                  as Guarantor


                                             By______________________
                                               Title:
                                             The ACE Building
                                             30 Woodbourne Avenue
                                             Hamilton HM 08, Bermuda
                                             Telex number:3543ACEILBA
                                             Facsimile number: (441)295-5221


The Common Seal of A.C.E.
Insurance Company, Ltd. was
hereunto affixed 
in the presence of:

Director

________________________________

Director/Secretary

________________________________

                                       59
<PAGE>
 
                                                     CORPORATE OFFICERS &
                                                       DIRECTORS ASSURANCE LTD.,
                                                       as Guarantor
                                                  
                                                  
                                                     By______________________
                                                       Title:
                                                     The ACE Building
                                                     30 Woodbourne Avenue
                                                     Hamilton HM 08, Bermuda
                                                     Telex number: 3543ACEILBA
                                                     Facsimile number: (441)    
                                                  
The Common Seal of Corporate
Officers & Directors Assurance
Ltd. was hereunto affixed
in the presence of:

Director

__________________________________

Director/Secretary

__________________________________

                                       60
<PAGE>
 
                                                TEMPEST REINSURANCE COMPANY
                                                  LIMITED, as Guarantor
                                                
                                                
                                                By______________________________
                                                  Title:
                                                The ACE Building
                                                30 Woodbourne Avenue
                                                Hamilton HM 08, Bermuda
                                                Telex number:3543ACEILBA
                                                Facsimile number: (441)295-5221

The Common Seal of Tempest
Reinsurance Company Limited
was hereunto affixed in the
presence of:

Director

________________________

Director/Secretary

________________________


Commitments
- -----------

$18,000,000                                     MORGAN GUARANTY TRUST
                                                 COMPANY OF NEW YORK


                                                 By_____________________________
                                                   Title:


$18,000,000                                     MELLON BANK, N.A.


                                                By______________________________
                                                  Title:

                                       61
<PAGE>
 
                                                Managing Agent

$17,000,000                                     CITIBANK, N.A.


                                                By____________________________
                                                  Title:


                                                Co-Agents

$14,000,000                                     THE BANK OF NEW YORK


                                                By____________________________
                                                  Title:


$14,000,000                                     THE BANK OF TOKYO-MITSUBISHI,
                                                  LTD.


                                                By____________________________
                                                  Title:


$14,000,000                                     BARCLAYS BANK PLC


                                                By____________________________
                                                  Title:

                                       62
<PAGE>
 
$14,000,000                                     DEUTSCHE BANK AG, NEW YORK
                                                  AND/OR CAYMAN ISLANDS
                                                  BRANCH


                                                By____________________________
                                                  Title:


                                                By:___________________________
                                                   Title:


$14,000,000                                     FLEET NATIONAL BANK


                                                By____________________________
                                                  Title:


$14,000,000                                     ING BANK, N.V.


                                                By____________________________
                                                  Title:


                                                By____________________________
                                                  Title:


$14,000,000                                     ROYAL BANK OF CANADA


                                                By____________________________
                                                  Title:

                                       63
<PAGE>
 
                                               Other Banks

$7,000,000                                     THE BANK OF BERMUDA, LTD.


                                               By_____________________________
                                                 Title:


$7,000,000                                     BANQUE NATIONALE DE PARIS


                                               By____________________________
                                                 Title:


                                               By____________________________
                                                 Title:


$7,000,000                                     THE CHASE MANHATTAN BANK


                                               By____________________________
                                                 Title:


$7,000,000                                     CREDIT LYONNAIS NEW YORK
                                                 BRANCH


                                               By_____________________________
                                                 Title:
                                                     

                                       64
<PAGE>
 
$7,000,000                                      DRESDNER BANK A.G., NEW YORK
                                                  BRANCH AND GRAND CAYMAN
                                                  BRANCH


                                                By____________________________
                                                  Title:


                                                By____________________________
                                                  Title:


$7,000,000                                      THE FIRST NATIONAL BANK OF
                                                  CHICAGO


                                                By____________________________


$7,000,000                                      STATE STREET BANK AND TRUST
                                                  COMPANY


                                                By____________________________
                                                  Title:

_______________

Total Commitments

$200,000,000
===============

                                       65
<PAGE>
 
                                                MORGAN GUARANTY TRUST
                                                  COMPANY OF NEW YORK,
                                                  as Administrative Agent


                                                By____________________________
                                                  Title
                                                60 Wall Street
                                                New York, New York 10260-0060
                                                Attention: Glenda Irving
                                                Telex number: 177615
                                                Facsimile number: 212-648-5249

                                       66
<PAGE>
 
                                                                       EXHIBIT A


                                     NOTE


                                                              New York, New York
                                                               December 11, 1997


     For value received, ACE Limited, a Cayman Islands company limited by shares
(the "Borrower"), promises to pay to the order of                (the "Bank"),
for the account of its Applicable Lending Office, the unpaid principal amount of
each Loan made by the Bank to the Borrower pursuant to the Credit Agreement
referred to below on the maturity date therefor specified in the Credit
Agreement. The Borrower promises to pay interest on the unpaid principal amount
of each such Loan on the dates and at the rate or rates provided for in the
Credit Agreement.  All such payments of principal and interest shall be made in
lawful money of the United States in Federal or other immediately available
funds at the office of Morgan Guaranty Trust Company of New York, 60 Wall
Street, New York, New York.

     All Loans made by the Bank, the respective types and maturities thereof and
all repayments of the principal thereof shall be recorded by the Bank and, if
the Bank so elects in connection with any transfer or enforcement hereof,
appropriate notations to evidence the foregoing information with respect to each
such Loan then outstanding may be endorsed by the Bank on the schedule attached
hereto, or on a continuation of such schedule attached to and made a part
hereof; provided that the failure of the Bank to make any such recordation or
endorsement shall not affect the obligations of any Obligor hereunder or under
the Credit Agreement.

     This note is one of the Notes referred to in the 364-Day Credit Agreement
dated as of December 11, 1997 among the Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the banks listed on the signature pages thereof
and Morgan Guaranty Trust Company of New York, as Administrative Agent (as the
same may be amended from time to time, the "Credit Agreement").  Terms defined
in the Credit Agreement are used herein with the same meanings. Reference is
made to the Credit Agreement for provisions for the prepayment hereof and the
acceleration of the maturity hereof.
<PAGE>
 
     Pursuant to the Credit Agreement payment of principal and interest on this
Note is unconditionally guaranteed by the Guarantors named above.


                                  ACE LIMITED


                                  By_________________________________
                                    Title:

                                       2
<PAGE>
 
                                 Note (cont'd)

                        LOANS AND PAYMENTS OF PRINCIPAL


<TABLE>
<CAPTION>
 Date    Amount of    Type of    Amount of    Maturity    Notation
           Loan        Loan      Principal      Date      Made By
                                  Repaid
- --------------------------------------------------------------------- 
<S>      <C>          <C>        <C>          <C>         <C>
- --------------------------------------------------------------------- 
 
- ---------------------------------------------------------------------  

- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  
 
- --------------------------------------------------------------------- 
 
- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  
 
- ---------------------------------------------------------------------  

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 

- --------------------------------------------------------------------- 
</TABLE>

                                       3
<PAGE>
 
                                                                       EXHIBIT B


                       Form of Money Market Quote Request
                       ----------------------------------


                                    [Date]


To:    Morgan Guaranty Trust Company of New York
         (the "Administrative Agent")

From:  [Name of Borrower]

Re:    364-Day Credit Agreement (as amended, the "Credit Agreement") dated as of
       December 11, 1997 among the Borrower, A.C.E. Insurance Company, Ltd.,
       Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
       Company Limited, as Guarantors, the Banks listed on the signature pages
       thereof and the Administrative Agent


       We hereby give notice pursuant to Section 2.03 of the Credit Agreement
that we request Money Market Quotes for the following proposed Money Market
Borrowing(s):

Date of Borrowing:  __________________

Principal Amount/*/                 Interest Period/**/
- ----------------                    ---------------   

$

       Such Money Market Quotes should offer a Money Market [Margin] [Absolute 
Rate]. [The applicable base rate is the London Interbank Offered Rate]


____________________
/*/   Amount must be $10,000,000 or a larger multiple of $1,000,000.
/**/  Not less than one month (LIBOR Auction) or not less than 7 days (Absolute
      Rate Auction), subject to the provisions of the definition of Interest
      Period.
<PAGE>
 
     Terms used herein have the meanings assigned to them in the Credit
Agreement.

                                        ACE LIMITED


                                        By:___________________________
                                           Title:

                                       2
<PAGE>
 
                                                                       EXHIBIT C


                  Form of Invitation for Money Market Quotes
                   ------------------------------------------


To:        [Name of Bank]

Re:        Invitation for Money Market Quotes to [Name of Borrower] (the
           "Borrower")

     Pursuant to Section 2.03 of the 364-Day Credit Agreement dated as of
December 11, 1997, as amended, among the Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the Banks parties thereto and the undersigned,
as Administrative Agent, we are pleased on behalf of the Borrower to invite you
to submit Money Market Quotes to the Borrower for the following proposed Money
Market Borrowing(s):

Date of Borrowing:  __________________

Principal Amount                    Interest Period
- ----------------                    ---------------

$


     Such Money Market Quotes should offer a Money Market [Margin] [Absolute
Rate]. [The applicable base rate is the London Interbank Offered Rate. ]

     Please respond to this invitation by no later than [2:00 P.M.] [9:30
A.M.] (New York City time) on [date].

                                      MORGAN GUARANTY TRUST
                                        COMPANY OF NEW YORK


                                      By:___________________________
                                         Authorized Officer
<PAGE>
 
                                                                       EXHIBIT D


                          Form of Money Market Quote
                          --------------------------


To:  Morgan Guaranty Trust Company of New York,
       as Administrative Agent

Re:  Money Market Quote to [Name of Borrower] (the "Borrower")


     In response to your invitation on behalf of the Borrower dated
_____________, 19__, we hereby make the following Money Market Quote on the
following terms:

1.   Quoting Bank:  ________________________________

2.   Person to contact at Quoting Bank:

     _____________________________

3.   Date of Borrowing: ____________________/*/

4.   We hereby offer to make Money Market Loan(s) in the following principal
     amounts, for the following Interest Periods and at the following rates:

<TABLE> 
<CAPTION> 
     Principal       Interest           Money Market
     Amount/**/     Period/***/         [Margin/****/] [Absolute Rate/*****/]
     ----------     -----------         -------------------------------------
     <S>            <C>                 <C> 
     $
</TABLE> 

_______________________
     /*/     As specified in the related Invitation.

     /**/    Principal amount bid for each Interest Period may not exceed
principal amount requested. Specify limitation if the individual offers exceeds
the amount the Bank is willing to lend. Bids must be made for $5,000,000 or a
larger multiple of $1,000,000.

     /***/   Not less than one month or not less than 7 days, as specified in
the related Invitation. No more than five bids are permitted for each Interest
Period.

     /****/  Margin over or under the London Interbank Offered Rate determined
for the applicable Interest Period. Specify percentage (to the nearest 1/10,000
of 1%) and specify whether "PLUS" or "MINUS".

     /*****/ Specify rate of interest per annum (to the nearest 1/10,000th of
1%).
<PAGE>
 
     $

     [Provided, that the aggregate principal amount of Money Market Loans for
     which the above offers may be accepted shall not exceed $____________.]/**/

     We understand and agree that the offer(s) set forth above, subject to the
satisfaction of the applicable conditions set forth in the 364-Day Credit
Agreement dated as of December 11, 1997 among the Borrower, A.C.E. Insurance
Company, Ltd. and Corporate Officers & Directors Assurance Ltd. and Tempest
Reinsurance Company Limited, as Guarantors, the Banks listed on the signature
pages thereof and yourselves, as Administrative Agent, irrevocably obligates us
to make the Money Market Loan(s) for which any offer(s) are accepted, in whole
or in part.

                              Very truly yours,

                              [NAME OF BANK]


Dated:________________        By____________________________
                                   Authorized Officer

                                       2
<PAGE>
 
                                                                       EXHIBIT H


                     FORM OF DAVIS POLK & WARDWELL OPINION
                     -------------------------------------

 
                            December 11, 1997


To the Banks and the Administrative Agent
   Referred to Below
c/o Morgan Guaranty Trust Company
   of New York, as Administrative Agent
60 Wall Street
New York, New York  10260-0060

Ladies and Gentlemen:

     We have participated in the preparation of the 364-Day Credit Agreement
(the "Credit Agreement") dated as of December 11, 1997 among ACE Limited, a
Cayman Islands company limited by shares, A.C.E. Insurance Company, Ltd., a
Bermuda limited liability company, Corporate Officers & Directors Assurance
Ltd., a Bermuda limited liability company, and Tempest Reinsurance Company
Limited, a Bermuda limited liability company, as Guarantors, the Banks listed on
the signature pages thereof (the "Banks") and Morgan Guaranty Trust Company of
New York, as Administrative Agent, and have acted as special United States
counsel for the Agents for the purpose of rendering this opinion pursuant to
Section 3.01(e) of the Credit Agreement.  Terms defined in the Credit Agreement
are used herein as therein defined.

     We have examined originals or copies, certified or otherwise identified to
our satisfaction, of such documents, corporate records, certificates of public
officials and other instruments and have conducted such other investigations of
fact and law as we have deemed necessary or advisable for purposes of this
opinion.

     Upon the basis of the foregoing, we are of the opinion that:

     1.   The execution, delivery and performance by the Borrower of the
Credit Agreement and the Notes are within the Borrower's corporate powers and
have been duly authorized by all necessary corporate action.
<PAGE>
 
To the Bank and the Agent              2                       December 11, 1997
  Referred to Below      


     2.   The execution, delivery and performance by each Guarantor of the
Credit Agreement are within such Guarantor's corporate powers and have been duly
authorized by all necessary corporate action.

     3.   The Credit Agreement constitutes a valid and binding agreement of
the Borrower and each Note constitutes a valid and binding obligation of the
Borrower, in each case enforceable in accordance with its terms, except as the
same may be limited by bankruptcy, insolvency or similar laws affecting
creditors' rights generally and by general principles of equity.

     4.   The Credit Agreement constitutes a valid and binding agreement of
each Guarantor enforceable in accordance with its terms, except as the same may
be limited by bankruptcy, insolvency or similar laws affecting creditors' rights
generally and by general principles of equity.

     In giving the foregoing opinion we have relied, with your consent and
without independent investigation, as to all matters governed by the laws of (i)
the Cayman Islands, upon the opinion of Maples and Calder dated the date hereof,
a copy of which has been delivered by you pursuant to Section 3.01(b) of the
Credit Agreement and (ii) Bermuda, upon the opinion of Conyers, Dill & Pearman
dated the date hereof, a copy of which has been delivered to you pursuant to
Section 3.01(c) of the Credit Agreement.

     This opinion is rendered solely to you in connection with the above matter.
This opinion may not be relied upon by you for any other purpose or relied upon
by any other Person without our prior written consent.

                                                        Very truly yours,
<PAGE>
 
                                                                       EXHIBIT I


                      ASSIGNMENT AND ASSUMPTION AGREEMENT


     AGREEMENT dated as of __________ __, 19__ among [ASSIGNOR] (the
"Assignor"), [ASSIGNEE] (the "Assignee"), ACE Limited, ACE US Holdings, Inc.
("ACE US"), A.C.E. Insurance Company, Ltd ("ACE Insurance") and MORGAN GUARANTY
TRUST COMPANY OF NEW YORK, as Issuing Bank and as Administrative Agent (the
"Administrative Agent").

                              W I T N E S S E T H
                              - - - - - - - - - -

     WHEREAS, this Assignment and Assumption Agreement (the "Assignment
Agreement") relates to (i) the Five-Year Credit Agreement (as amended from time
to time, the "Five Year Credit Agreement") and the 364-Day Credit Agreement (as
amended from time to time, the "364-Day Credit Agreement") each dated as of
December 11, 1997 among ACE Limited, as Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the Assignor and the other Banks party thereto,
as Banks, and the Administrative Agent, (ii) the Term Loan Agreement (as amended
from time to time, the "Term Loan Agreement") the dated as of December 11, 1997
among ACE US, as Borrower, ACE Limited, as Guarantor, the Assignor and the other
Banks party thereto, as Banks, and the Administrative Agent and (iii) the
Amended and Restated Reimbursement Agreement dated as of December 11, 1997 among
ACE Insurance, the Assignor and the other Banks party thereto and the
Administrative Agent (the "Reimbursement Agreement" and together with the Five-
Year Credit Agreement, the 364-Day Credit Agreement and the Term Loan Agreement,
collectively, "the Facilities");

     WHEREAS, under the Five-Year Credit Agreement, the Assignor has a
Commitment to make Loans to ACE Limited and participate in Letters of Credit in
an aggregate principal amount at any time outstanding not to exceed $__________;

     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the
Five-Year Credit Agreement in the aggregate principal amount of $__________ are
outstanding at the date hereof;
<PAGE>
 
     WHEREAS, Letters of Credit with a total amount available for drawing under
the Five-Year Credit Agreement of $____________ are outstanding at the date
hereof;

     WHEREAS, under the 364-Day Credit Agreement, the Assignor has a Commitment
to make Loans to ACE Limited in an aggregate principal amount at any time
outstanding not to exceed $_________;

     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the 364-
Day Credit Agreement in the aggregate principal amount of $_________ are
outstanding at the date hereof;

     WHEREAS, under the Term Loan Agreement, the Assignor has [a Commitment to
make][outstanding] Loans to ACE US in an aggregate principal amount of
$_____________;

     WHEREAS, pursuant to the Reimbursement Agreement, the Assignor is a
participant to the extent of _____% in up to (Pounds)153,683,466 of Letters of
Credit outstanding thereunder;

     WHEREAS, the Assignor proposes to assign to the Assignee an aggregate
interest in the Facilities of $__________, comprised as follows: (i) all of the
rights of the Assignor under the Five-Year Credit Agreement in respect of a
portion of its Commitment thereunder in an amount equal to $__________ (the
"Five-Year Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans and Letter of Credit Liabilities thereunder, (ii)
all of the rights of the Assignor under the 364-Day Credit Agreement in respect
of a portion of its Commitment thereunder in an amount equal to $_____________
(the "364-Day Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans thereunder, (iii) all of the rights of the Assignor
under the Term Loan Agreement in respect of a portion of its [Commitment]
[Loans] thereunder in an amount equal to $_______________ (the "Term Loan
Assigned Amount" and, together with the Five-Year Assigned Amount and the 364-
Day Assigned Amount, collectively the "Assigned Amounts"), and (iv) a portion of
the rights and obligations of the Assignor under the Reimbursement Agreement
equivalent to a Participation Percentage of ____% (the "Assigned Percentage"),
and the Assignee proposes to accept assignment of such rights and assume the
corresponding obligations from the Assignor on such terms;

     NOW, THEREFORE, in consideration of the foregoing and the mutual agreements
contained herein, the parties hereto agree as follows:
<PAGE>
 
     SECTION 1.  Definitions. All capitalized terms not otherwise defined herein
                 -----------                                                    
shall have the respective meanings set forth in the Five-Year Credit Agreement,
the 364-Day Credit Agreement, the Term Loan Agreement and the Reimbursement
Agreement, as applicable.

     SECTION 2.  Assignment.  The Assignor hereby assigns and sells to the
                 ----------                                               
Assignee all of the rights of the Assignor under each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement and the Term Loan Agreement to the
extent of the Five-Year Assigned Amount, the 364-Day Assigned Amount and the
Term Loan Assigned Amount, respectively, and under the Reimbursement Agreement
to the extent of the Assigned Percentage, and the Assignee hereby accepts such
assignment from the Assignor and assumes all of the obligations of the Assignor
under each of the Five-Year Credit Agreement, the 364-Day Credit Agreement and
the Term Loan Agreement to the extent of the Five-year Assigned Amount, the 364-
Day Assigned Amount and the Term Loan Assigned Amount and under the
Reimbursement Agreement to the extent of the Assigned Percentage, including the
purchase from the Assignor of the corresponding portion of the principal amount
of the Committed Loans made by the Assignor and Letter of Credit Liabilities of
and the corresponding portion of the participating interests of the Assignor in
the Letters of Credit under the Reimbursement Agreement, outstanding at the date
hereof.  Upon the execution and delivery hereof by the Assignor, the Assignee,
ACE Limited, ACE US, ACE Insurance, the Issuing Bank(s) and the Administrative
Agent and the payment of the amounts specified in Section 3 required to be paid
on the date hereof (i) the Assignee shall, as of the date hereof, succeed to the
rights and be obligated to perform the obligations of the Assignor under each of
the Five-Year Credit Agreement, the 364-Day Credit Agreement and the Term Loan
Agreement with a Commitment in an amount equal to the Five-Year Assigned Amount,
the 364-Day Assigned Amount and the Term Loan Assigned Amount, respectively and
under the Reimbursement Agreement to the extent of the Assigned Percentage, and
(ii) the Commitment of the Assignor under each of the Facilities and the
Participation Percentage of the Assignor under the Reimbursement Agreement
shall, as of the date hereof, be reduced by the corresponding amount and the
Assignor released from its obligations under each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement, the Term Loan Agreement and the
Reimbursement Agreement to the extent such obligations have been assumed by the
Assignee.  The assignment provided for herein shall be without recourse to the
Assignor.

     SECTION 3.  Payments.  As consideration for the assignment and sale
                 --------                                               
contemplated in Section 2 hereof, the Assignee shall pay to the Assignor on the
<PAGE>
 
date hereof in Federal funds the amount heretofore agreed between them./******/
It is understood that ticking and/or facility fees accrued to the date hereof
are for the account of the Assignor and such fees accruing from and including
the date hereof are for the account of the Assignee. Each of the Assignor and
the Assignee hereby agrees that if it receives any amount under any Related
Document which is for the account of the other party hereto, it shall receive
the same for the account of such other party to the extent of such other party's
interest therein and shall promptly pay the same to such other party.

     SECTION 4.  Consents.  This Agreement is conditioned upon the consent of
                 --------                                                    
the Administrative Agent and the Issuing Bank(s) and ACE Limited, ACE US and ACE
Insurance, pursuant to Section 10.06(c) of each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement and the Term Loan Agreement and Section
8.06(c) of the Reimbursement Agreement.  The execution of this Agreement by such
persons is evidence of such consents.  Pursuant to Section 10.06(c) of each of
the 364-Day Credit Agreement, the Five-Year Credit Agreement and the Term Loan
Agreement, each of ACE Limited and ACE US, respectively, agrees to execute and
deliver a Note payable to the order of the Assignee to evidence the assignment
and assumption provided for herein.

     SECTION 5.  Non-Reliance on Assignor.  The Assignor makes no representation
                 ------------------------                                       
or warranty in connection with, and shall have no responsibility with respect
to, the solvency, financial condition, or statements of any of ACE Limited and
its subsidiaries or the validity and enforceability of the obligations of ACE
Limited and its subsidiaries under the Related Documents.  The Assignee
acknowledges that it has, independently and without reliance on the Assignor,
and based on such documents and information as it has deemed appropriate, made
its own credit analysis and decision to enter into this Agreement and will
continue to be responsible for making its own independent appraisal of the
business, affairs and financial condition of ACE Limited and its subsidiaries.

     SECTION 6.  Governing Law.  This Agreement shall be governed by and
                 -------------                                          
construed in accordance with the laws of the State of New York.

     SECTION 7.  Counterparts.  This Agreement may be signed in any number of
                 ------------                                                
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

_______________________

/******/ Amount should combine principal together with accrued interest and
breakage compensation, if any, to be paid by the Assignee, net of any portion of
any upfront fee to be paid by the Assignor to the Assignee.
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered by their duly authorized officers as of the date first above
written.

                                   [ASSIGNOR]


                                   By___________________________________________
                                     Title:


                                   [ASSIGNEE]


                                   By___________________________________________
                                     Title:


                                   ACE LIMITED


                                   By___________________________________________
                                     Title:


                                   ACE US HOLDINGS, INC.


                                   By___________________________________________
                                     Title:


                                   A.C.E. INSURANCE COMPANY, LTD.


                                   By___________________________________________
                                     Title:


                                   MORGAN GUARANTY TRUST
                                   COMPANY OF NEW YORK, as Issuing     
                                   Bank and as Administrative Agent


                                   By___________________________________________
                                     Title:
<PAGE>
 
                                                                       EXHIBIT J


                            [CT Corporation System]


                           December 11, 1997


To the Persons Identified on
   on Schedule A Attached Hereto:

     We have reviewed (i) the Five-Year Credit Agreement dated as of December
11, 1997 (the "Five-Year Credit Agreement") and the 364-Day Credit Agreement
(the "364-Day Credit Agreement") each among ACE LIMITED, as Borrower, A.C.E.
INSURANCE COMPANY, LTD., CORPORATE OFFICERS & DIRECTORS ASSURANCE LTD. and
TEMPEST REINSURANCE COMPANY LIMITED, as Guarantors, the Banks listed therein,
and Morgan Guaranty Trust Company of New York, as Administrative Agent, (ii) the
Term Loan Agreement (the "Term Loan Agreement") dated as of December 11, 1997
among ACE US HOLDINGS, INC., as Borrower, ACE LIMITED, as Guarantor, the Banks
listed therein and Morgan Guaranty Trust Company of New York, as Administrative
Agent, (iii) the Subordinated Loan Agreement dated as of December 11, 1997 (the
"Subordinated Loan Agreement") among ACE US HOLDINGS, INC., as Borrower, A.C.E.
INSURANCE COMPANY, LTD., as Lender and Morgan Guaranty Trust Company of New
York, as Administrative Agent and (iv) the Amended and Restated Reimbursement
Agreement dated as of December 11, 1997 among A.C.E. INSURANCE COMPANY, LTD., as
Account Party, the Banks listed therein and Morgan Guaranty Trust Company of New
York, as Issuing Bank and Agent (the "Amended and Restated Reimbursement
Agreement" and together with the Five-Year Credit Agreement, the 364-Year Credit
Agreement, the Term Loan Agreement and the Subordinated Loan Agreement,
collectively, the "Agreements"), in each of which CT Corporation System is named
as agent to receive service of process in the State of New York on behalf of (a)
the Borrower and each Guarantor under each of the Five-Year Credit Agreement and
the 364-Day Credit Agreement, (b) the Borrower and the Guarantor under the Term
Loan Agreement, (c) the Borrower and the Lender under the Subordinated Loan
Agreement and (d) the Account Party under the Amended and Restated Reimbursement
Agreement, at the address of 1633 Broadway, New York, New York 10019. Upon
review of our appointment outlined in Section 10.10(b) of each of the 364-Day
Credit Agreement, the Five-Year Credit Agreement and the
<PAGE>
 
Term Loan Agreement, Section 8(c) of the Subordinated Loan Agreement and Section
8.10(b) of the Amended and Restated Reimbursement Agreement, we understand that
our role as registered agent is confined to receiving service of process only.
We also understand that the term of our appointment as registered agent under
each such Agreements shall remain in effect until each of the Agreements shall
have been terminated and all obligations thereunder of each Borrower, each
Guarantor, the Lender and the Account Party shall have been paid in full, or
until such time as we are instructed in writing by the Administrative Agent to
discontinue our service.

     We accept and confirm our appointment as registered agent and we understand
that any notice or process received by us in our capacity as registered agent
shall be promptly sent by telephone, fax, telex, cable or any other means of
instant communication, and thereafter by reputable overnight carrier to:

     On Behalf of the Borrower and each Guarantor under each of the 364-Day
Credit Agreement and the Five-Year Credit Agreement and the Guarantor under the
Term Loan Agreement:



                    ACE Limited
                    The ACE Building
                    30 Woodbourne Avenue
                    Hamilton HM 08, Bermuda
                    (Fax 441-295-5221)

     with copy to:  Morgan Guaranty Trust
                    Company of New York
                    60 Wall Street
                    New York, NY  10260-0060
                    (Fax 212-648-5249)

     On behalf of the Borrower under the Term Loan Agreement and the
Subordinated Loan Agreement

          ACE US Holdings, Inc.
          Six Concourse Parkway Suite, Suite 2700
          Atlanta, GA 30374

     with copy to:  Morgan Guaranty Trust
                    Company of New York
                    60 Wall Street
<PAGE>
 
                    New York, NY  10260-0060
                    (Fax 212-648-5249)

     On behalf of the Account Party under the Amended and Restated Reimbursement
Agreement and the Lender under the Subordinated Loan Agreement

          A.C.E. Insurance Company, Ltd.
          The ACE Building
          30 Woodbourne Avenue
          Hamilton HM 08, Bermuda
          (Fax 441-295-5221)

     with copy to:  Morgan Guaranty Trust
                    Company of New York
                    60 Wall Street
                    New York, NY  10260-0060
                    (Fax 212-648-5249)

We appreciate this opportunity to be of service.

                    Very truly yours,

                    CT CORPORATION SYSTEM


                    By:___________________________
                       Title:
<PAGE>
 
                                                                      SCHEDULE A



Morgan Guaranty Trust Company
  of New York, as Issuing Bank
  and as Administrative Agent


Morgan Guaranty Trust Company
  of New York

Mellon Bank, N.A.

Citibank, N.A.

The Bank of New York

The Bank of Tokyo-Mitsubishi, Ltd.
 
Barclays Bank PLC

Deutsche Bank AG, New York and/or
  Cayman Islands Branch

Fleet National Bank

ING Bank, N.V.

Royal Bank of Canada

The Bank of Bermuda, Ltd.

Banque Nationale de Paris

The Chase Manhattan Bank

Credit Lyonnais New York Branch

Dresdner Bank A.G., New York Branch
and Grand Cayman Branch
 
<PAGE>
 
The First National Bank of Chicago
 
State Street Bank and Trust Company

ACE Limited, as Borrower under the
  364-Day Credit Agreement and the
  Five-Year Credit Agreement and as
  Guarantor under the Term Loan Agreement

A.C.E. Insurance Company, Ltd., as Guarantor
  under the 364-Day Credit Agreement and
  the Five-Year Credit Agreement, as
  Account Party under the Amended and Restated
  Reimbursement Agreement and as Lender under
  the Subordinated Loan Agreement

Corporate Officers & Directors
  Assurance Ltd., as Guarantor under
  the 364-Day Credit Agreement and
  the Five-Year Credit Agreement

Tempest Reinsurance Company Limited,
  as Guarantor under the 364-Day Credit
  Agreement and the Five-Year Credit
  Agreement

ACE US Holdings, Inc., as Borrower under
  the Term Loan Agreement and as Borrower
  under the Subordinated Loan Agreement

<PAGE>
 
                                                                   EXHIBIT 10.31


                                                         EXECUTION COPY

                                 $200,000,000

                                   FIVE-YEAR
                               CREDIT AGREEMENT

                                  dated as of

                               December 11, 1997

                                     among

                                 ACE Limited,
                                 as Borrower,

                        A.C.E. Insurance Company, Ltd.,
                 Corporate Officers & Directors Assurance Ltd.
                                      and
                     Tempest Reinsurance Company Limited,
                                as Guarantors,

                            The Banks Listed Herein

                                      and

                  Morgan Guaranty Trust Company of New York,
                            as Administrative Agent

                              _________________


                          J.P. Morgan Securities Inc.
                                      and
                               Mellon Bank N.A.,
                             Co-Syndication Agents

                  Morgan Guaranty Trust Company of New York,
                              Documentation Agent
<PAGE>
 
                               TABLE OF CONTENTS

                                _______________

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
                                   ARTICLE 1
                                  DEFINITIONS

SECTION 1.01.  Definitions...................................................  1
SECTION 1.02.  Accounting Terms and Determinations........................... 12
SECTION 1.03.  Types of Borrowings........................................... 13
SECTION 1.04.  United States Dollars......................................... 13

                                   ARTICLE 2
                                  THE CREDITS

SECTION 2.01.  Commitments to Lend........................................... 13
SECTION 2.02.  Notice of Committed Borrowing................................. 13
SECTION 2.03.  Money Market Borrowings....................................... 14
SECTION 2.04.  Notice of Banks; Funding of Loans............................. 18
SECTION 2.05.  Notes......................................................... 19
SECTION 2.06.  Maturity of Loans............................................. 19
SECTION 2.07.  Interest Rates................................................ 20
SECTION 2.08.  Fees.......................................................... 21
SECTION 2.09.  Optional Termination or Reduction of Commitments.............. 22
SECTION 2.10.  Scheduled Termination of Commitments.......................... 22
SECTION 2.11.  Method of Electing Interest Rates............................. 22
SECTION 2.12.  Optional Prepayments.......................................... 24
SECTION 2.13.  General Provisions as to Payments............................. 24
SECTION 2.14.  Funding Losses................................................ 25
SECTION 2.15.  Computation of Interest and Fees.............................. 26
SECTION 2.16.  Regulation D Compensation..................................... 26
SECTION 2.17.  Letters of Credit............................................. 26

                                   ARTICLE 3
                                  CONDITIONS

SECTION 3.01.  Closing....................................................... 30
SECTION 3.02.  Borrowings and Issuances of Letters of Credit................. 31
</TABLE>

<PAGE>

<TABLE>
<CAPTION> 
                                                                               PAGE
                                                                               ----
<S>                                                                            <C> 
                                            ARTICLE 4
                                 REPRESENTATIONS AND WARRANTIES

SECTION 4.01.  Corporate Existence and Power..................................   32
SECTION 4.02.  Corporate and Governmental Authorization; No                        
               Contravention..................................................   32
SECTION 4.03.  Binding Effect.................................................   32
SECTION 4.04.  Financial Information..........................................   32
SECTION 4.05.  Litigation.....................................................   34
SECTION 4.06.  ERISA..........................................................   34
SECTION 4.07.  Taxes..........................................................   34
SECTION 4.08.  Not an Investment Company......................................   34
SECTION 4.09.  Full Disclosure................................................   34
SECTION 4.10.  Compliance with Laws...........................................   35
                                                                                   
                                            ARTICLE 5                              
                                            COVENANTS                              
                                                                                   
SECTION 5.01.  Information....................................................   35
SECTION 5.02.  Payment of Obligations.........................................   37
SECTION 5.03.  Maintenance of Property; Insurance.............................   37
SECTION 5.04.  Conduct of Business and Maintenance of Existence...............   38
SECTION 5.05.  Compliance with Laws...........................................   38
SECTION 5.06.  Inspection of Property, Book and Records.......................   38
SECTION 5.07.  Leverage.......................................................   38
SECTION 5.08.  Subsidiary Debt................................................   39
SECTION 5.09.  Minimum Tangible Net Worth.....................................   39
SECTION 5.10.  Negative Pledge................................................   39
SECTION 5.11.  Consolidations, Mergers and Sales of Assets....................   40
SECTION 5.12.  Use of Proceeds................................................   41
SECTION 5.13.  ERISA..........................................................   41
                                                                                   
                                            ARTICLE 6                              
                                            DEFAULTS                               
                                                                                   
SECTION 6.01.  Events of Default..............................................   41
SECTION 6.02.  Notice of Default..............................................   44
SECTION 6.03.  Cash Cover.....................................................   44 
</TABLE> 

                                      ii
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                               PAGE
                                                                               ----
<S>                                                                            <C> 
                                            ARTICLE 7
                                           THE AGENTS

SECTION 7.01.  Appointment and Authorization..................................  45
SECTION 7.02.  Administrative Agent and Affiliates............................  45
SECTION 7.03.  Action by Administrative Agent.................................  45
SECTION 7.04.  Consultation with Experts......................................  45
SECTION 7.05.  Liability of Administrative Agent..............................  45
SECTION 7.06.  Indemnification................................................  46
SECTION 7.07.  Credit Decision................................................  46
SECTION 7.08.  Successor Administrative Agent.................................  46
SECTION 7.09.  Administrative Agent's Fee.....................................  47
SECTION 7.10.  Other Agents...................................................  47
                                                                                  
                                            ARTICLE 8                             
                                     CHANGE IN CIRCUMSTANCES                      
                                                                                  
SECTION 8.01.  Basis for Determination Interest Rate Inadequate or                
               Unfair.........................................................  47
SECTION 8.02.  Illegality.....................................................  48
SECTION 8.03.  Increased Cost and Reduced Return..............................  48
SECTION 8.04.  Taxes..........................................................  50
SECTION 8.05.  Base Rate Loans Substituted for Affected Fixed Rate Loans......  52
SECTION 8.06.  Substitution of Bank...........................................  52
                                                                                  
                                            ARTICLE 9                             
                                            GUARANTY                              
                                                                                  
SECTION 9.01.  The Guaranty...................................................  53
SECTION 9.02.  Guaranty Unconditional.........................................  53
SECTION 9.03.  Discharge Only upon Payment in Full; Reinstatement in              
               Certain Circumstances..........................................  54
SECTION 9.04.  Waiver by Each of the Guarantors...............................  54
SECTION 9.05.  Subrogation....................................................  54
SECTION 9.06.  Stay of Acceleration...........................................  55
SECTION 9.07.  Limit of Liability.............................................  55 
</TABLE> 

                                      iii
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                                PAGE
                                                                                ----
<S>                                                                             <C> 
                                           ARTICLE 10
                                          MISCELLANEOUS

SECTION 10.01.  Notices.......................................................    55  
SECTION 10.02.  No Waivers....................................................    55  
SECTION 10.03.  Expenses; Indemnification.....................................    56  
SECTION 10.04.  Sharing of Set-Offs...........................................    56  
SECTION 10.05.  Amendments and Waivers........................................    57  
SECTION 10.06.  Successors and Assigns........................................    58  
SECTION 10.07.  Collateral....................................................    59  
SECTION 10.08.  Governing Law.................................................    59  
SECTION 10.09.  Counterparts; Integration; Effectiveness......................    59  
SECTION 10.10.  Judicial Proceedings..........................................    60  
SECTION 10.11.  Judgment Currency.............................................    61  
SECTION 10.12.  WAIVER OF JURY TRIAL..........................................    62  
SECTION 10.13.  Existing Credit Agreement.....................................    62  
SECTION 10.14.  Confidentiality...............................................    62  
</TABLE> 

PRICING SCHEDULE

EXHIBIT A         --        NOTE
EXHIBIT B         --        FORM OF MONEY MARKET QUOTE REQUEST
EXHIBIT C         --        FORM OF INVITATION FOR MONEY MARKET
                            QUOTES
EXHIBIT D         --        FORM OF MONEY MARKET QUOTE
EXHIBIT E         --        FORM OF MAPLES AND CALDER OPINION
EXHIBIT F         --        FORM OF CONYERS, DILL & PEARMAN OPINION
EXHIBIT G         --        FORM OF MAYER, BROWN & PLATT OPINION
EXHIBIT H         --        FORM OF DAVIS POLK & WARDWELL OPINION
EXHIBIT I         --        ASSIGNMENT AND ASSUMPTION AGREEMENT
EXHIBIT J         --        LETTER FROM CT CORPORATION SYSTEM
 
                                      iv
<PAGE>
 
                                   FIVE-YEAR
                               CREDIT AGREEMENT


          AGREEMENT dated as of December 11, 1997 among ACE LIMITED, A.C.E.
INSURANCE COMPANY, LTD., CORPORATE OFFICERS & DIRECTORS ASSURANCE LTD. and
TEMPEST REINSURANCE COMPANY LIMITED, the BANKS listed on the signature pages
hereof and MORGAN GUARANTY TRUST COMPANY OF NEW YORK, as Administrative Agent.

          WHEREAS, the Borrower desires to replace the existing Credit Agreement
dated as of November 15, 1996 among the Borrower, certain of the Guarantors,
certain banks and Morgan Guaranty Trust Company of New York, as agent, by
entering into this Agreement; and

          WHEREAS,  the Banks agree to do so.

          NOW, THEREFORE, the parties hereto agree as follows:



                                   ARTICLE 1
                                  DEFINITIONS

          SECTION 1.01. Definitions. The following terms, as used herein, have
the following meanings:

          "ABSOLUTE RATE AUCTION" means a solicitation of Money Market Quotes
setting forth Money Market Absolute Rates pursuant to Section 2.03.

          "ACE INSURANCE" means A.C.E. Insurance Company, Ltd., a Bermuda
limited liability company, and its successors.

          "ACE US" means ACE US Holdings, Inc., a Delaware corporation, and its
successors.

          "ADMINISTRATIVE AGENT" means Morgan Guaranty Trust Company of New York
in its capacity as administrative agent for the Banks under the Financing
Documents, and its successors in such capacity.
<PAGE>
 
          "AGENT" means each of the Administrative Agent, the Documentation
Agent, the Syndication Agents, the Managing Agent and the Co-Agents, and
"Agents" means any combination of them, as the context may require.

          "ADMINISTRATIVE QUESTIONNAIRE" means, with respect to each Bank, an
administrative questionnaire in the form prepared by the Administrative Agent
and submitted to the Administrative Agent (with a copy to the Borrower) duly
completed by such Bank.

          "APPLICABLE LENDING OFFICE" means, with respect to any Bank, (i) in
the case of its Base Rate Loans, its Domestic Lending Office, (ii) in the case
of its Euro-Dollar Loans, its Euro-Dollar Lending Office and (iii) in the case
of its Money Market Loans, its Money Market Lending Office.

          "ASSIGNEE" has the meaning set forth in Section 10.06(c).

          "AUTHORIZED OFFICER" means any of (i) the Chairman, President and
Chief Executive Officer of the Borrower, (ii) the General Counsel and Secretary
of the Borrower, (iii) the President of ACE Insurance, (iv) the Chief Financial
Officer of the Borrower, (v) the Chief Investment Officer of the Borrower, (vi)
the Chairman of ACE UK Ltd., or (vii) any other Person designated in a notice
given to the Administrative Agent by any two of the foregoing Persons, and
"Authorized Officers" means all of the foregoing Persons.

          "BANK" means each bank listed on the signature pages hereof, each
Assignee which becomes a Bank pursuant to Section 10.06(c), and their respective
successors.

          "BASE RATE" means, for any day, a rate per annum equal to the higher
of (i) the Prime Rate for such day and (ii) the sum of 1/2 of 1% plus the
Federal Funds Rate for such day.

          "BASE RATE LOAN" means a Committed Loan which bears interest at the
Base Rate pursuant to the applicable Notice of Committed Borrowing or Notice of
Interest Rate Election or the provisions of Section 2.11(a) or Article 8.

          "BERMUDA COMPANIES LAW" means The Companies Act 1981 of Bermuda, as
amended, and the regulations promulgated thereunder.

          "BERMUDA INSURANCE LAW" means The Insurance Act 1978 of Bermuda, as
amended, and the regulations promulgated thereunder.

                                       2
<PAGE>
 
         "BORROWER" means ACE Limited, a Cayman Islands company limited by
shares, and its successors.

         "BORROWING" has the meaning set forth in Section 1.03.

         "CO-AGENT"  means each Bank  designated  as a Co-Agent on the signature
pages hereof, in its capacity as co-agent in respect of this Agreement.

         "CLOSING DATE" means the date on or after the Effective  Date on which
the  Administrative  Agent shall have  received  the  documents  specified in or
pursuant to Section 3.01.

         "CODA" means Corporate  Officers & Directors  Assurance Ltd., a Bermuda
limited liability company, and its successors.

         "COMMITMENT"  means,  with  respect to each Bank,  the amount set forth
opposite the name of such Bank on the signature pages hereof, as such amount may
be reduced from time to time pursuant to Section 2.09.

         "COMMITTED LOAN" means a loan made by a Bank pursuant to Section 2.01;
provided  that, if any such loan or loans (or portions  thereof) are combined or
subdivided  pursuant to a Notice of Interest Rate Election,  the term "Committed
Loan"  shall  refer  to  the  combined  principal  amount  resulting  from  such
combination  or to each of the separate  principal  amounts  resulting from such
subdivision, as the case may be.

         "CONSOLIDATED DEBT" means at any date the Debt of the Borrower and its
Consolidated Subsidiaries, determined on a consolidated basis as of such date.

         "CONSOLIDATED NET INCOME" means, for any period,  the net income of the
Borrower and its Consolidated  Subsidiaries,  determined on a consolidated basis
for such period.

         "CONSOLIDATED SUBSIDIARY"  means at any date any  Subsidiary  or other
entity the accounts of which would be consolidated with those of the Borrower in
its  consolidated  financial  statements if such  statements were prepared as of
such date.

         "CONSOLIDATED TANGIBLE NET WORTH"  means at any date the  consolidated
stockholders'  equity of the Borrower  and its  Consolidated  Subsidiaries  less
their consolidated  Intangible Assets, all determined as of such date;  provided
that such  determination  for purposes of Sections 5.07,  5.09 and 5.10 shall be
made without giving effect to  adjustments  pursuant to Statement No. 115 of the
Financial

                                       3
<PAGE>
 
Accounting Standards Board. For purposes of this definition  "Intangible Assets"
means the amount (to the  extent  reflected  in  determining  such  consolidated
stockholders'  equity) of (i) all write-ups (other than write-ups resulting from
foreign  currency  translations  and  write-ups  of  assets  of a going  concern
business  made within  twelve  months after the  acquisition  of such  business)
subsequent to June 30, 1997 in the book value of any asset owned by the Borrower
or a Consolidated Subsidiary and (ii) all unamortized debt discount and expense,
unamortized  deferred charges,  deferred acquisition costs,  goodwill,  patents,
trademarks,  service marks, trade names,  anticipated future benefit of tax loss
carry-forwards,  copyrights,  organization or  developmental  expenses and other
intangible assets.

         "DEBT" of any Person means at any date,  without  duplication,  (i) all
obligations  of such Person for borrowed  money,  (ii) all  obligations  of such
Person evidenced by bonds, debentures, notes or other similar instruments, (iii)
all obligations of such Person to pay the deferred purchase price of property or
services,  except  trade  accounts  payable  arising in the  ordinary  course of
business, (iv) all obligations of such Person as lessee which are capitalized in
accordance with generally accepted accounting principles, (v) all non-contingent
obligations  (and,  solely for purposes of Section 5.10 and the  definitions  of
Material Debt and Material Financial Obligations, all contingent obligations) of
such Person to  reimburse  any bank or other  Person in respect of amounts  paid
under a letter of credit or similar instrument,  (vi) all Debt secured by a Lien
on any asset of such Person, whether or not such Debt is otherwise an obligation
of such Person, and (vii) all Debt of others Guaranteed by such Person, provided
that the term "Debt" shall not include obligations of an insurance company under
insurance policies or surety bonds issued by it.

         "DEFAULT"  means any condition or event which  constitutes  an Event of
Default  or which  with the  giving of  notice  or lapse of time or both  would,
unless cured or waived, become an Event of Default.

         "DERIVATIVES OBLIGATIONS"  of any Person means all obligations of such
Person in  respect  of any rate  swap  transaction,  basis  swap,  forward  rate
transaction,  commodity  swap,  commodity  option,  equity or equity index swap,
equity or equity index  option,  bond  option,  interest  rate  option,  foreign
exchange transaction,  cap transaction,  floor transaction,  collar transaction,
currency swap transaction, cross-currency rate swap transaction, currency option
or any other similar  transaction  (including  any option with respect to any of
the foregoing transactions) or any combination of the foregoing transactions.

         "DOCUMENTATION AGENT" means Morgan  Guaranty Trust Company of New York
in its capacity as documentation agent in respect of this Agreement.

                                       4
<PAGE>
 
         "DOMESTIC BUSINESS DAY"  means any day except a  Saturday,  Sunday or
other day on which  commercial  banks in New York City are  authorized by law to
close.

         "DOMESTIC LENDING OFFICE" means, as to each Bank, its office located at
its address set forth in its Administrative  Questionnaire (or identified in its
Administrative  Questionnaire  as its  Domestic  Lending  Office)  or such other
office as such Bank may hereafter  designate as its Domestic  Lending  Office by
notice to the Borrower and the Administrative Agent.

         "EFFECTIVE  DATE" means the date this  Agreement  becomes  effective in
accordance with Section 10.09.

         "ERISA" means the Employee  Retirement  Income Security Act of 1974, as
amended, or any successor statute.

         "ERISA  Group"  means,  with respect to any Person,  such  Person,  any
Subsidiary of such Person and all members of a controlled  group of corporations
and all trades or businesses  (whether or not incorporated) under common control
which, together with such Person or any such Subsidiary, are treated as a single
employer under Section 414 of the Internal Revenue Code.

         "EURO-DOLLAR BUSINESS DAY" means any  Domestic  Business Day on which
commercial  banks are open for  international  business  (including  dealings in
dollar deposits) in London.

         "EURO-DOLLAR LENDING OFFICE" means, as to each Bank, its office, branch
or   affiliate   located  at  its  address  set  forth  in  its   Administrative
Questionnaire  (or  identified  in  its  Administrative   Questionnaire  as  its
Euro-Dollar  Lending  Office) or such other office,  branch or affiliate of such
Bank as it may hereafter  designate as its Euro-Dollar  Lending Office by notice
to the Borrower and the Administrative Agent.

         "EURO-DOLLAR LOAN"  means a Committed  Loan which bears  interest at a
Euro-Dollar  Rate pursuant to the  applicable  Notice of Committed  Borrowing or
Notice of Interest Rate Election.

         "EURO-DOLLAR MARGIN"  means  a rate  per  annum  determined  daily  in
accordance with the Pricing Schedule.

         "EURO-DOLLAR RATE"  means a rate of  interest  determined  pursuant to
Section 2.07(b) on the basis of a London Interbank Offered Rate.

                                       5
<PAGE>
 
         "EURO-DOLLAR RESERVE PERCENTAGE"  means  for any day that  percentage
(expressed  as a decimal)  which is in effect on such day, as  prescribed by the
Board  of  Governors  of the  Federal  Reserve  System  (or any  successor)  for
determining  the maximum  reserve  requirement  for a member bank of the Federal
Reserve System in New York City with deposits  exceeding five billion dollars in
respect of  "Eurocurrency  liabilities"  (or in respect of any other category of
liabilities  which includes  deposits by reference to which the interest rate on
Euro-Dollar Loans is determined or any category of extensions of credit or other
assets which includes loans by a non-United  States office of any Bank to United
States residents).

         "EVENT OF DEFAULT" has the meaning set forth in Section 6.01.

         "FACILITY FEE RATE"  means  a rate  per  annum  determined  daily  in
accordance with the Pricing Schedule.

         "FEDERAL FUNDS RATE" means,  for any day, the rate per annum  (rounded
upward,  if  necessary,  to the  nearest  1/100th  of 1%) equal to the  weighted
average of the rates on overnight Federal funds transactions with members of the
Federal  Reserve  System  arranged  by Federal  funds  brokers  on such day,  as
published by the Federal  Reserve Bank of New York on the Domestic  Business Day
next  succeeding  such  day,  provided  that (i) if such  day is not a  Domestic
Business  Day,  the  Federal  Funds Rate for such day shall be such rate on such
transactions on the next preceding  Domestic Business Day as so published on the
next succeeding  Domestic Business Day, and (ii) if no such rate is so published
on such next succeeding  Domestic  Business Day, the Federal Funds Rate for such
day shall be the average  rate quoted to Morgan  Guaranty  Trust  Company of New
York on such day on such transactions as determined by the Administrative Agent.

         "FINANCING DOCUMENTS" means this Agreement and the Notes.

         "FIXED RATE LOANS"  means  Euro-Dollar  Loans or Money  Market  Loans
(excluding  Money Market LIBOR Loans bearing  interest at the Base Rate pursuant
to Section 8.01(a)) or any combination of the foregoing.

         "GROUP OF LOANS"  means  at  any  time a  group  of  Committed  Loans
consisting of (i) all Base Rate Loans which are outstanding at such time or (ii)
all  Euro-Dollar  Loans having the same Interest  Period at such time;  provided
that, if a Committed  Loan of any  particular  Bank is converted to or made as a
Base Rate Loan pursuant to Section 8.02 or 8.04,  such Loan shall be included in
the same  Group or Groups of Loans from time to time as it would have been in if
it had not been so converted or made.

                                       6
<PAGE>
 
         "GUARANTEE"  by  any  Person  means  any   obligation,   contingent  or
otherwise,  of such Person directly or indirectly  guaranteeing  any Debt of any
other  Person  and,  without  limiting  the  generality  of the  foregoing,  any
obligation,  direct or indirect,  contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Debt (whether  arising by virtue of  partnership  arrangements,  by agreement to
keep-well, to purchase assets, goods, securities or services, to take-or-pay, or
to maintain  financial  statement  conditions or otherwise) or (ii) entered into
for the purpose of  assuring in any other  manner the holder of such Debt of the
payment  thereof or to protect such holder  against loss in respect  thereof (in
whole  or  in  part),  provided  that  the  term  Guarantee  shall  not  include
endorsements  for collection or deposit in the ordinary course of business.  The
term "Guarantee" used as a verb has a corresponding meaning.

         "GUARANTORS" means ACE Insurance, CODA and Tempest.

         "INDEMNITEE" has the meaning set forth in Section 10.03(b).

         "INTEREST PERIOD" means: (1) with respect to each Euro-Dollar Loan, the
period commencing on the date of borrowing specified in the applicable Notice of
Committed Borrowing or on the date specified in an applicable Notice of Interest
Rate  Election  and ending  one,  two,  three or six months  thereafter,  as the
Borrower may elect in the applicable notice; provided that:

               (a)  any Interest Period which would otherwise end on a day which
         is not a Euro-Dollar Business Day shall, subject to clause (c) below,
         be extended to the next succeeding Euro-Dollar Business Day unless such
         Euro-Dollar Business Day falls in another calendar month, in which case
         such Interest Period shall end on the next preceding Euro-Dollar
         Business Day;

               (b)  any Interest Period which begins on the last Euro-Dollar
         Business Day of a calendar month (or on a day for which there is no
         numerically corresponding day in the calendar month at the end of such
         Interest Period) shall, subject to clause (c) below, end on the last
         Euro-Dollar Business Day of a calendar month; and

               (c)  any Interest Period which would otherwise end after the
         Termination Date shall end on the Termination Date;

         (2)  with  respect to each Money Market  LIBOR  Borrowing,  the period
commencing on the date of such Borrowing and ending such whole number of

                                       7
<PAGE>
 
months  thereafter  as the Borrower may elect in  accordance  with Section 2.03;
provided that:

               (a)  any Interest Period which would otherwise end on a day which
         is not a Euro-Dollar Business Day shall, subject to clause (c) below,
         be extended to the next succeeding Euro-Dollar Business Day unless such
         Euro-Dollar Business Day falls in another calendar month, in which case
         such Interest Period shall end on the next preceding Euro-Dollar
         Business Day;

               (b)  any Interest Period which begins on the last Euro-Dollar
         Business Day of a calendar month (or on a day for which there is no
         numerically corresponding day in the calendar month at the end of such
         Interest Period) shall, subject to clause (c) below, end on the last
         Euro-Dollar Business Day of a calendar month; and

               (c)  any Interest Period which would otherwise end after the
         Termination Date shall end on the Termination Date; and

         (3)  with respect to each Money Market  Absolute Rate  Borrowing,  the
period  commencing on the date of such  Borrowing and ending such number of days
thereafter  (but not less than 7 days) as the Borrower  may elect in  accordance
with Section 2.03; provided that:

               (a)  any Interest Period which would otherwise end on a day which
         is not a Euro-Dollar Business Day shall, subject to clause (b) below,
         be extended to the next succeeding Euro-Dollar Business Day; and

               (b)  any Interest Period which would otherwise end after the
         Termination Date shall end on the Termination Date.

         "INTERNAL REVENUE CODE" means the Internal  Revenue Code of 1986,  as
amended, or any successor statute.

         "ISSUING BANK" means Morgan  Guaranty Trust Company of New York and any
other Bank that may agree  with the  Borrower  in  writing  to issue  letters of
credit hereunder,  in each case as issuer of a Letter of Credit  hereunder.  The
Borrower  shall  promptly  notify  the  Administrative  Agent of any  additional
Issuing Banks.

         "LC FEE RATE" means a rate per annum equal to the Euro-Dollar Margin.

                                       8
<PAGE>
 
         "LETTER OF CREDIT"  means a letter of  credit  issued or to be issued
hereunder by an Issuing Bank in accordance with Section 2.17.

         "LETTER OF CREDIT COMMITMENT" means the lesser of (x) $50,000,000 and
(y) the aggregate amount of the Commitments.

         "LETTER OF CREDIT LIABILITIES"  means,  for any Bank and at any time,
such Bank's  ratable  participation  in the sum of (x) the amounts then owing by
the  Borrower in respect of amounts  drawn  under  Letters of Credit and (y) the
aggregate amount then available for drawing under all Letters of Credit.

         "LIBOR AUCTION"  means a  solicitation  of Money Market Quotes setting
forth Money Market Margins based on the London  Interbank  Offered Rate pursuant
to Section 2.03.

         "LIEN" means,  with respect to any asset, any mortgage,  lien,  pledge,
charge,  security  interest  or  encumbrance  of any kind,  or any other type of
preferential  arrangement  that has the practical  effect of creating a security
interest,  in respect of such asset.  For the  purposes of this  Agreement,  the
Borrower  or any  Subsidiary  shall be deemed to own subject to a Lien any asset
which it has  acquired  or holds  subject to the  interest of a vendor or lessor
under any  conditional  sale  agreement,  capital lease or other title retention
agreement relating to such asset.

         "LOAN" means a Base Rate Loan or a  Euro-Dollar  Loan or a Money Market
Loan and  "Loans"  means Base Rate Loans or  Euro-Dollar  Loans or Money  Market
Loans or any combination of the foregoing.

         "LONDON INTERBANK OFFERED RATE" has the meaning set forth in Section
2.07(b).

         "MANAGING AGENT" means Citibank, N.A. in its capacity as managing
agent in respect of this Agreement.

         "MATERIAL DEBT"  means Debt  (other  than the  Notes) of the  Borrower
and/or  one or more of its  Subsidiaries,  arising  in one or  more  related  or
unrelated  transactions,  in an  aggregate  principal  or face amount  exceeding
$25,000,000.

         "MATERIAL FINANCIAL OBLIGATIONS"  means a principal or face amount of
Debt and/or current payment obligations in respect of Derivatives Obligations of
the  Borrower  and/or  one or more of its  Subsidiaries,  arising in one or more
related or unrelated transactions, exceeding in the aggregate $25,000,000.

                                       9
<PAGE>
 
         "MONEY MARKET ABSOLUTE RATE" has the meaning set forth in Section
2.03(d).

         "MONEY MARKET ABSOLUTE RATE LOAN"  means a loan to be made by a Bank
pursuant to an Absolute Rate Auction.

         "MONEY MARKET LENDING OFFICE"  means,  as to each Bank,  its Domestic
Lending Office or such other office,  branch or affiliate of such Bank as it may
hereafter designate as its Money Market Lending Office by notice to the Borrower
and the  Administrative  Agent;  provided that any Bank may from time to time by
notice to the Borrower and the  Administrative  Agent  designate  separate Money
Market  Lending  Offices for its Money Market LIBOR Loans,  on the one hand, and
its Money  Market  Absolute  Rate Loans,  on the other  hand,  in which case all
references  herein  to the Money  Market  Lending  Office of such Bank  shall be
deemed to refer to either or both of such offices, as the context may require.

         "MONEY MARKET LIBOR LOAN" means a loan to be made by a Bank pursuant to
a LIBOR  Auction  (including  such a loan  bearing  interest  at the  Base  Rate
pursuant to Section 8.01(a)).

         "MONEY MARKET LOAN" means a Money Market LIBOR Loan or a Money
Market Absolute Rate Loan.

         "MONEY MARKET MARGIN" has the meaning set forth in Section 2.03(d).

         "MONEY MARKET QUOTE"  means an offer by a Bank to make a Money Market
Loan in accordance with Section 2.03.

         "NOTES" means  promissory  notes of the Borrower,  substantially in the
form of Exhibit A hereto, evidencing the obligation of the Borrower to repay the
Loans, and "Note" means any one of such promissory notes issued hereunder.

         "NOTICE OF BORROWING" means a Notice of Committed Borrowing (as defined
in Section  2.02) or a Notice of Money Market  Borrowing  (as defined in Section
2.03(f)).

         "NOTICE OF COMMITTED BORROWING" has the meaning set forth in
Section 2.02.

         "NOTICE OF INTEREST RATE ELECTION" has the meaning set forth in
Section 2.11.

         "NOTICE OF ISSUANCE" has the meaning set forth in Section 2.17(b).

                                      10
<PAGE>
 
         "OBLIGORS" means the Borrower and each of the Guarantors.

         "OTHER TAXES" has the meaning set forth in Section 8.04(b).

         "PARENT" MEANS, with respect to any Bank, any Person controlling such
Bank.

         "PARTICIPANT" has the meaning set forth in Section 10.06(b).

         "PERSON" means an individual, a corporation,  a partnership,  a limited
liability company, an association,  a trust or any other entity or organization,
including a government or political  subdivision or an agency or instrumentality
thereof.

         "PRICING SCHEDULE" means the Schedule hereto titled as such.

         "PRIME RATE" means the rate of interest  publicly  announced by Morgan
Guaranty  Trust  Company  of New York in New York  City from time to time as its
Prime Rate.

         "REFERENCE BANKS" means the principal London offices of Deutsche Bank
AG, Mellon Bank N.A. and Morgan Guaranty Trust Company of New York.

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

         "RELATED DOCUMENTS"  means  (i)  the  Financing  Documents,  (ii)  the
"Financing  Documents" as defined in the 364-Day  Credit  Agreement of even date
herewith among the parties hereto, (iii) the "Financing Documents" as defined in
the Amended and Restated  Reimbursement  Agreement dated as of December 11, 1997
among ACE Insurance, the Banks parties thereto and Morgan Guaranty Trust Company
of New York,  as Issuing Bank and  Administrative  Agent for such Banks and (iv)
the  "Financing  Documents"  as defined in the Term Loan  Agreement of even date
herewith  among ACE US,  the  Borrower,  the Banks  parties  thereto  and Morgan
Guaranty Trust Company of New York, as  administrative  agent for such Banks, in
each case as the same may be amended and in effect from time to time.

         "REQUIRED BANKS" means at any time Banks having at least 66 2/3% of the
aggregate  amount of the  Commitments  or, if the  Commitments  shall  have been
terminated, having at least 66 2/3% of the sum of the aggregate unpaid principal
amount of the Loans and the aggregate amount of Letter of Credit Liabilities.

                                      11
<PAGE>
 
     "SUBSIDIARY" means, as to any Person, any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by such Person; unless
otherwise specified, "SUBSIDIARY" means a Subsidiary of the Borrower.

     "SYNDICATION AGENT" means either J.P. Morgan Securities Inc. or Mellon Bank
N.A. in its capacity as a syndication agent in respect of this Agreement, and
"Syndication Agents" means both of them.

     "TAXES" has the meaning set forth in Section 8.04(a).

     "TEMPEST" means Tempest Reinsurance Company Limited, a Bermuda limited
liability company, and its successors.

     "TERMINATION DATE" means December 11, 2002 or, if such day is not a Euro-
Dollar Business Day, the next preceding Euro-Dollar Business Day.

     "UCP" means the Uniform Customs and Practice for Documentary Credits of the
International Chamber of Commerce, 1993 Revision (Publication No. 500).

     "WHOLLY-OWNED CONSOLIDATED SUBSIDIARY" means any Consolidated
Subsidiary all of the shares of capital stock or other ownership interests of
which (except directors' qualifying shares) are at the time directly or
indirectly owned by the Borrower.

     SECTION 1.02.  Accounting Terms and Determinations. Unless otherwise
specified herein, all accounting terms used herein shall be interpreted, all
accounting determinations hereunder shall be made, and all financial statements
required to be delivered hereunder shall be prepared in accordance with United
States generally accepted accounting principles as in effect from time to time,
applied on a basis consistent (except for changes concurred in by the Borrower's
independent public accountants) with the most recent audited consolidated
financial statements of the Borrower and its Consolidated Subsidiaries delivered
to the Banks; provided that, if the Borrower notifies the Administrative Agent
that the Borrower wishes to amend any covenant in Article 5 to eliminate the
effect of any change in generally accepted accounting principles on the
operation of such covenant (or if the Administrative Agent notifies the Borrower
that the Required Banks wish to amend Article 5 for such purpose), then the
Borrower's compliance with such covenant shall be determined on the basis of
generally accepted accounting principles in effect immediately before the
relevant change in generally accepted accounting principles became effective,
until either such notice

                                       12
<PAGE>
 
is withdrawn or such covenant is amended in a manner satisfactory to the
Borrower and the Required Banks.

     SECTION 1.03.  Types of Borrowings.  The term "BORROWING" denotes the
aggregation of Loans of one or more Banks to be made to the Borrower pursuant to
Article 2 on a single date and for a single Interest Period. Borrowings are
classified for purposes of this Agreement either by reference to the pricing of
Loans comprising such Borrowing (e.g., a "EURO-DOLLAR BORROWING" is a Borrowing
comprised of Euro-Dollar Loans) or by reference to the provisions of Article 2
under which participation therein is determined (i.e., a "COMMITTED BORROWING"
is a Borrowing under Section 2.01 in which all Banks participate in proportion
to their Commitments, while a "MONEY MARKET BORROWING" is a Borrowing under
Section 2.03 in which the Bank participants are determined on the basis of their
bids in accordance therewith).

     SECTION 1.04.  United States Dollars.  Each reference herein to "DOLLARS"
or "$" shall refer to United States Dollars.

                                   ARTICLE 2
                                  THE CREDITS

     SECTION 2.01.  Commitments to Lend. Each Bank severally agrees, on the
terms and conditions set forth in this Agreement, to make loans to the Borrower
pursuant to this Section from time to time prior to the Termination Date in
amounts such that the sum of the aggregate principal amount of Committed Loans
by such Bank at any one time outstanding plus the Letter of Credit Liabilities
of such Bank at such time shall not exceed the amount of its Commitment. Each
Borrowing under this Section shall be in an aggregate principal amount of
$10,000,000 or any larger multiple of $1,000,000 (except that any such Borrowing
may be in the aggregate amount available in accordance with Section 3.02(c)) and
shall be made from the several Banks ratably in proportion to their respective
Commitments. Within the foregoing limits, the Borrower may borrow under this
Section, repay, or to the extent permitted by Section 2.12, prepay Loans and
reborrow at any time prior to the Termination Date.

     SECTION 2.02.  Notice of Committed Borrowing. The Borrower shall give the
Administrative Agent notice (such notice to be signed by any two of the
Authorized Officers and hereinafter referred to as a "NOTICE OF COMMITTED
BORROWING") not later than 10:30 A.M. (New York City time) on (x) the date of
each Base Rate Borrowing and (y) the third Euro-Dollar Business Day before each
Euro-Dollar Borrowing, specifying:

                                       13
<PAGE>
 
     (a)  the date of such Borrowing, which shall be a Domestic Business Day in
the case of a Base Rate Borrowing or a Euro-Dollar Business Day in the case of a
Euro-Dollar Borrowing,

     (b)  the aggregate amount of such Borrowing,

     (c)  whether the Loans comprising such Borrowing are to be Base Rate
Loans or Euro-Dollar Loans, and

     (d)  in the case of a Fixed Rate Borrowing, the duration of the Interest
Period applicable thereto, subject to the provisions of the definition of
Interest Period.

     SECTION 2.03.  Money Market Borrowings.  (a) The Money Market Option. In
addition to Committed Borrowings pursuant to Section 2.01, the Borrower may, as
set forth in this Section, request the Banks prior to the Termination Date to
make offers to make Money Market Loans to the Borrower. The Banks may, but shall
have no obligation to, make such offers and the Borrower may, but shall have no
obligation to, accept any such offers in the manner set forth in this Section.

     (b)  Money Market Quote  Request.  When the Borrower wishes to request
offers to make Money Market Loans under this Section, it shall transmit to the
Administrative Agent by telex or facsimile transmission a Money Market Quote
Request substantially in the form of Exhibit B hereto so as to be received no
later than 10:30 A.M. (New York City time) on (x) the fifth Euro-Dollar Business
Day prior to the date of Borrowing proposed therein, in the case of a LIBOR
Auction or (y) the Domestic Business Day next preceding the date of Borrowing
proposed therein, in the case of an Absolute Rate Auction (or, in either case,
such other time or date as the Borrower and the Administrative Agent shall have
mutually agreed and shall have notified to the Banks not later than the date of
the Money Market Quote Request for the first LIBOR Auction or Absolute Rate
Auction for which such change is to be effective) specifying:

          (i)   the proposed date of Borrowing, which shall be a Euro-Dollar
     Business Day in the case of a LIBOR Auction or a Domestic Business Day in
     the case of an Absolute Rate Auction,

          (ii)  the aggregate amount of such Borrowing, which shall be
     $10,000,000 or a larger multiple of $1,000,000,

          (iii) the duration of the Interest Period applicable thereto, subject
         to the provisions of the definition of Interest Period, and

                                       14
<PAGE>
 
          (iv)  whether the Money Market Quotes requested are to set forth a
     Money Market Margin or a Money Market Absolute Rate.

The Borrower may request offers to make Money Market Loans for more than one
Interest Period in a single Money Market Quote Request. No Money Market Quote
Request shall be given within five Euro-Dollar Business Days (or such other
number of days as the Borrower and the Administrative Agent may agree) of any
other Money Market Quote Request.

     (c)  Invitation for Money Market Quotes.  Promptly upon receipt of a Money
Market Quote Request, the Administrative Agent shall send to the Banks by telex
or facsimile transmission an Invitation for Money Market Quotes substantially in
the form of Exhibit C hereto, which shall constitute an invitation by the
Borrower to each Bank to submit Money Market Quotes offering to make the Money
Market Loans to which such Money Market Quote Request relates in accordance with
this Section.

     (d)  Submission and Contents of Money Market Quotes.  (i) Each Bank may
submit a Money Market Quote containing an offer or offers to make Money Market
Loans in response to any Invitation for Money Market Quotes. Each Money Market
Quote must comply with the requirements of this subsection (d) and must be
submitted to the Administrative Agent by telex or facsimile transmission at its
offices specified in or pursuant to Section 10.01 not later than (x) 2:00 P.M.
(New York City time) on the fourth Euro-Dollar Business Day prior to the
proposed date of Borrowing, in the case of a LIBOR Auction or (y) 9:30 A.M. (New
York City time) on the proposed date of Borrowing, in the case of an Absolute
Rate Auction (or, in either case, such other time or date as the Borrower and
the Administrative Agent shall have mutually agreed and shall have notified to
the Banks not later than the date of the Money Market Quote Request for the
first LIBOR Auction or Absolute Rate Auction for which such change is to be
effective); provided that Money Market Quotes submitted by the Administrative
Agent (or any affiliate of the Administrative Agent) in the capacity of a Bank
may be submitted, and may only be submitted, if the Administrative Agent or such
affiliate notifies the Borrower of the terms of the offer or offers contained
therein not later than (x) one hour prior to the deadline for the other Banks,
in the case of a LIBOR Auction or (y) 15 minutes prior to the deadline for the
other Banks, in the case of an Absolute Rate Auction. Subject to Articles 3 and
6, any Money Market Quote so made shall be irrevocable except with the written
consent of the Administrative Agent given on the instructions of the Borrower.

     (ii) Each Money  Market  Quote  shall be in  substantially  the form of
Exhibit D hereto and shall in any case specify:

                                       15
<PAGE>
 
                    (A)  the proposed date of Borrowing,

                    (B)  the principal amount of the Money Market Loan for which
               each such offer is being made, which principal amount (w) may be
               greater than or less than the Commitment of the quoting Bank, (x)
               must be $5,000,000 or a larger multiple of $1,000,000, (y) may
               not exceed the principal amount of Money Market Loans for which
               offers were requested and (z) may be subject to an aggregate
               limitation as to the principal amount of Money Market Loans for
               which offers being made by such quoting Bank may be accepted,

                    (C)  in the case of a LIBOR Auction, the margin above or
               below the applicable London Interbank Offered Rate (the "Money
               Market Margin") offered for each such Money Market Loan,
               expressed as a percentage (specified to the nearest 1/10,000th of
               1%) to be added to or subtracted from such base rate,

                    (D)  in the case of an Absolute Rate Auction, the rate of
               interest per annum (specified to the nearest 1/10,000th of 1%)
               (the "Money Market Absolute Rate") offered for each such Money
               Market Loan, and

                    (E)  the identity of the quoting Bank.

A Money Market Quote may set forth up to five separate offers by the quoting
Bank with respect to each Interest Period specified in the related Invitation
for Money Market Quotes.

     (iii) Any Money Market Quote shall be disregarded if it:

                    (A)  is not substantially in conformity with Exhibit D
               hereto or does not specify all of the information required by
               subsection (d)(ii);

                    (B)  contains qualifying, conditional or similar language;

                    (C)  proposes terms other than or in addition to those set
               forth in the applicable Invitation for Money Market Quotes; or

                    (D)  arrives after the time set forth in subsection (d)(i).
                      

                                       16
<PAGE>
 
     (e)  Notice to Borrower. The Administrative Agent shall promptly notify the
Borrower of the terms (x) of any Money Market Quote submitted by a Bank that is
in accordance with subsection (d) and (y) of any Money Market Quote that amends,
modifies or is otherwise inconsistent with a previous Money Market Quote
submitted by such Bank with respect to the same Money Market Quote Request. Any
such subsequent Money Market Quote shall be disregarded by the Administrative
Agent unless such subsequent Money Market Quote is submitted solely to correct a
manifest error in such former Money Market Quote. The Administrative Agent's
notice to the Borrower shall specify (A) the aggregate principal amount of Money
Market Loans for which offers have been received for each Interest Period
specified in the related Money Market Quote Request, (B) the respective
principal amounts and Money Market Margins or Money Market Absolute Rates, as
the case may be, so offered and (C) if applicable, limitations on the aggregate
principal amount of Money Market Loans for which offers in any single Money
Market Quote may be accepted.

     (f)  Acceptance and Notice by Borrower.  Not later than 10:30 A.M. (New
York City time) on (x) the third Euro-Dollar Business Day prior to the proposed
date of Borrowing, in the case of a LIBOR Auction or (y) the proposed date of
Borrowing, in the case of an Absolute Rate Auction (or, in either case, such
other time or date as the Borrower and the Administrative Agent shall have
mutually agreed and shall have notified to the Banks not later than the date of
the Money Market Quote Request for the first LIBOR Auction or Absolute Rate
Auction for which such change is to be effective), the Borrower shall notify the
Administrative Agent of its acceptance or non-acceptance of the offers so
notified to it pursuant to subsection (e). In the case of acceptance, such
notice (such notice to be signed by any two of the Authorized Officers and
hereinafter referred to as a "Notice of Money Market Borrowing") shall specify
the aggregate principal amount of offers for each Interest Period that are
accepted. The Borrower may accept any Money Market Quote in whole or in part;
provided that:

          (i)   the aggregate principal amount of each Money Market Borrowing
     may not exceed the applicable amount set forth in the related Money Market
     Quote Request,

          (ii)  the principal amount of each Money Market Borrowing must be
     $10,000,000 or a larger multiple of $1,000,000,

          (iii) acceptance of offers may only be made on the basis of ascending
     Money Market Margins or Money Market Absolute Rates, as the
     case may be, and

                                       17
<PAGE>
 
          (iv)  the Borrower may not accept any offer that is described in
     subsection (d)(iii) or that otherwise fails to comply with the requirements
     of this Agreement.

     (g)  Allocation by Administrative Agent. If offers are made by two or more
Banks with the same Money Market Margins or Money Market Absolute Rates, as the
case may be, for a greater aggregate principal amount than the amount in respect
of which such offers are accepted for the related Interest Period, the principal
amount of Money Market Loans in respect of which such offers are accepted shall
be allocated by the Administrative Agent among such Banks as nearly as possible
(in multiples of $1,000,000, as the Administrative Agent may deem appropriate)
in proportion to the aggregate principal amounts of such offers. Determinations
by the Administrative Agent of the amounts of Money Market Loans shall be
conclusive in the absence of manifest error.

     SECTION 2.04. Notice of Banks; Funding of Loans. (a) Upon receipt of a
Notice of Borrowing, the Administrative Agent shall promptly notify each Bank of
the contents thereof and of such Bank's share (if any) of such Borrowing and
such Notice of Borrowing shall not thereafter be revocable by the Borrower.

     (b)  Not later than 12:00 Noon (New York City time) on the date of each
Borrowing, each Bank participating therein shall make available its share of
such Borrowing, in Federal or other funds immediately available in New York
City, to the Administrative Agent at its address referred to in Section 10.01.
Unless the Administrative Agent determines that any applicable condition
specified in Article 3 has not been satisfied, the Administrative Agent will
make the funds so received from the Banks available to the Borrower at the
Administrative Agent's aforesaid address.

     (c)  Unless the Administrative Agent shall have received notice from a Bank
prior to the date of any Borrowing that such Bank will not make available to the
Administrative Agent such Bank's share of such Borrowing, the Administrative
Agent may assume that such Bank has made such share available to the
Administrative Agent on the date of such Borrowing in accordance with subsection
(b) of this Section 2.04 and the Administrative Agent may, in reliance upon such
assumption, make available to the Borrower on such date a corresponding amount.
If and to the extent that such Bank shall not have so made such share available
to the Administrative Agent, such Bank and the Borrower severally agree to repay
to the Administrative Agent forthwith on demand such corresponding amount
together with interest thereon, for each day from the date such amount is made
available to the Borrower until the date such amount is repaid to the
Administrative Agent, at (i) in the case of the Borrower, a rate per annum equal
to the interest rate applicable thereto pursuant to Section 2.07 and

                                       18
<PAGE>
 
(ii) in the case of such Bank, the Federal Funds Rate. If such Bank shall repay
to the Administrative Agent such corresponding amount, such amount so repaid
shall constitute such Bank's Loan included in such Borrowing for purposes of
this Agreement.

     SECTION 2.05. Notes. (a) The Loans of each Bank shall be evidenced by a
single Note payable to the order of such Bank for the account of its Applicable
Lending Office in an amount equal to the aggregate unpaid principal amount of
such Bank's Loans.

     (b)  Each Bank may, by notice to the Borrower and the Administrative Agent,
request that its Loans of a particular type be evidenced by a separate Note in
an amount equal to the aggregate unpaid principal amount of such Loans. Each
such Note shall be in substantially the form of Exhibit A hereto with
appropriate modifications to reflect the fact that it evidences solely Loans of
the relevant type. Each reference in this Agreement to the "Note" of such Bank
shall be deemed to refer to and include any or all of such Notes, as the context
may require.

     (c)  Upon receipt of each Bank's Note pursuant to Section 3.01(a), the
Administrative Agent shall forward such Note to such Bank. Each Bank shall
record the date, amount, type and maturity of each Loan made by it and the date
and amount of each payment of principal made by the Borrower with respect
thereto, and may, if such Bank so elects in connection with any transfer or
enforcement of its Note, endorse on the schedule forming a part thereof
appropriate notations to evidence the foregoing information with respect to each
such Loan then outstanding; provided that the failure of any Bank to make any
such recordation or endorsement shall not affect the obligations of any Obligor
hereunder or under the Notes. Each Bank is hereby irrevocably authorized by the
Borrower so to endorse its Note and to attach to and make a part of its Note a
continuation of any such schedule as and when required.

     SECTION 2.06.  Maturity of Loans.  (a) The Committed Loans shall mature,
and the principal amount thereof shall be due and payable, together with accrued
interest thereon, on the Termination Date.

     (b)  Each Money Market Loan included in any Money Market Borrowing shall
mature, and the principal amount thereof shall be due and payable, together with
accrued interest thereon, on the last day of the Interest Period applicable to
such Money Market Borrowing.

     SECTION 2.07.  Interest Rates.  (a) Each Base Rate Loan shall bear interest
on the outstanding principal amount thereof, for each day from the date such
Loan is made until it becomes due, at a rate per annum equal to the Base Rate
for such

                                       19
<PAGE>
 
day. Such interest shall be payable at maturity, quarterly in arrears on the
last day of each March, June, September and December prior to maturity, and with
respect to the principal amount of any Base Rate Loan converted to a Euro-Dollar
Loan, on the date such amount is so converted. Any overdue principal of or
interest on any Base Rate Loan shall bear interest, payable on demand, for each
day until paid at a rate per annum equal to the sum of 2% plus the rate
otherwise applicable to Base Rate Loans for such day.

     (b)  Each Euro-Dollar Loan shall bear interest on the outstanding principal
amount thereof, for each day during each Interest Period applicable thereto, at
a rate per annum equal to the sum of the Euro-Dollar Margin for such day plus
the London Interbank Offered Rate applicable to such Interest Period. Such
interest shall be payable for each Interest Period on the last day thereof and,
if such Interest Period is longer than three months, at intervals of three
months after the first day thereof.

     The "LONDON INTERBANK OFFERED RATE" applicable to any Interest Period means
the average (rounded upward, if necessary, to the next higher 1/16 of 1%) of the
respective rates per annum at which deposits in dollars are offered to each of
the Reference Banks in the London interbank market at approximately 11:00 A.M.
(London time) two Euro-Dollar Business Days before the first day of such
Interest Period in an amount approximately equal to the principal amount of the
Euro-Dollar Loan of such Reference Bank to which such Interest Period is to
apply and for a period of time comparable to such Interest Period.

     (c)  Any overdue principal of or interest on any Euro-Dollar Loan shall
bear interest, payable on demand, for each day until paid at a rate per annum
equal to the higher of (i) the sum of 2% plus the Euro-Dollar Margin plus the
London Interbank Offered Rate applicable to such Loan at the date of such
payment was due and (ii) the sum of 2% plus the Euro-Dollar Margin plus the
quotient obtained (rounded upward, if necessary, to the next higher 1/100 of 1%)
by dividing (x) the average (rounded upward, if necessary, to the next higher
1/16 of 1%) of the respective rates per annum at which one day (or, if such
amount due remains unpaid more than three Euro-Dollar Business Days, then for
such other period of time not longer than six months as the Administrative Agent
may select) deposits in dollars in an amount approximately equal to such overdue
payment due to each of the Reference Banks are offered to such Reference Bank in
the London interbank market for the applicable period determined as provided
above by (y) 1.00 minus the Euro-Dollar Reserve Percentage (or, if the
circumstances described in clause (a) or (b) of Section 8.01 shall exist, at a
rate per annum equal to the sum of 2% plus the rate applicable to Base Rate
Loans for such day).

                                       20
<PAGE>
 
          (d)  Subject to Section 8.01(a), each Money Market LIBOR Loan shall
bear interest on the outstanding principal amount thereof, for the Interest
Period applicable thereto, at a rate per annum equal to the sum of the London
Interbank Offered Rate for such Interest Period (determined in accordance with
Section 2.07(b) as if the related Money Market LIBOR Borrowing were a Euro-
Dollar Borrowing) plus (or minus) the Money Market Margin quoted by the Bank
making such Loan in accordance with Section 2.03. Each Money Market Absolute
Rate Loan shall bear interest on the outstanding principal amount thereof, for
the Interest Period applicable thereto, at a rate per annum equal to the Money
Market Absolute Rate quoted by the Bank making such Loan in accordance with
Section 2.03. Such interest shall be payable for each Interest Period on the
last day thereof and, if such Interest Period is longer than three months, at
intervals of three months after the first day thereof. Any overdue principal of
or interest on any Money Market Loan shall bear interest, payable on demand, for
each day until paid at a rate per annum equal to the sum of 2% plus the Base
Rate for such day.

          (e)  The Administrative Agent shall determine each interest rate
applicable to the Loans hereunder. The Administrative Agent shall give prompt
notice to the Borrower and the participating Banks of each rate of interest so
determined, and its determination thereof shall be conclusive in the absence of
manifest error.

          (f)  Each Reference Bank agrees to use its best efforts to furnish
quotations to the Administrative Agent as contemplated by this Section. If any
Reference Bank does not furnish a timely quotation, the Administrative Agent
shall determine the relevant interest rate on the basis of the quotation or
quotations furnished by the remaining Reference Bank or Banks or, if none of
such quotations is available on a timely basis, the provisions of Section 8.01
shall apply.

          SECTION 2.08. Fees. (a) The Borrower shall pay to the Administrative
Agent for the account of the Banks ratably a facility fee at the Facility Fee
Rate. Such facility fee shall accrue (i) from and including the Closing Date to
but excluding the Termination Date (or earlier date of termination of the
Commitments in their entirety), on the daily aggregate amount of the Commitments
(whether used or unused) and (ii) from and including the Termination Date or
such earlier date of termination to but excluding the date the Loans and the
Letter of Credit Liabilities shall be repaid in their entirety, on the sum of
the daily aggregate outstanding principal amount of the Loans and the daily
aggregate Letter of Credit Liabilities.

                                      21
<PAGE>
 
     (b)  The Borrower shall pay to the Agent (i) for the account of the Banks
ratably a Letter of Credit fee accruing daily on the aggregate amount then
available for drawing under all Letters of Credit at the LC Fee Rate and (ii)
for the account of each Issuing Bank a Letter of Credit fronting fee accruing
daily on the aggregate amount then available for drawing under all Letters of
Credit issued by such Issuing Bank at a rate per annum as determined from time
to time by the Borrower and such Issuing Bank.

     (c)  Accrued fees under this Section shall be payable quarterly in arrears
on each March 31, June 30, September 30 and December 31 and upon the date of
termination of the Commitments in their entirety (and, if later, the date the
Loans and Letter of Credit Liabilities shall be repaid in their entirety).

     SECTION 2.09.  Optional Termination or Reduction of Commitments. The
Borrower may, upon at least three Domestic Business Days' notice to the
Administrative Agent, (i) terminate the Commitments at any time, if no Loans or
Letter of Credit Liabilities are outstanding at such time or (ii) ratably reduce
from time to time by an aggregate amount of $25,000,000 or any larger multiple
of $5,000,000, the aggregate amount of the Commitments in excess of the sum of
the aggregate outstanding principal amount of the Loans and the aggregate Letter
of Credit Liabilities. Upon receipt of any notice pursuant to this Section 2.09,
the Administrative Agent shall promptly notify the Banks of the contents of such
notice.

     SECTION 2.10.  Scheduled Termination of Commitments. The Commitments shall
terminate on the Termination Date, and any Loans then outstanding (together with
accrued interest thereon) shall be due and payable on such date.

     SECTION 2.11.  Method of Electing Interest Rates. (a) The Loans included in
each Committed Borrowing shall bear interest initially at the type of rate
specified by the Borrower in the applicable Notice of Committed Borrowing.
Thereafter, the Borrower may from time to time elect to change or continue the
type of interest rate borne by each Group of Loans (subject to subsection (d) of
this Section and the provisions of Article 8), as follows:

          (i)  if such Loans are Base Rate Loans, the Borrower may elect to
     convert such Loans to Euro-Dollar Loans as of any Euro-Dollar Business Day;
     and

          (ii) if such Loans are Euro-Dollar Loans, the Borrower may elect to
     convert such Loans to Base Rate Loans or elect to continue such Loans as
     Euro-Dollar Loans for an additional Interest Period, subject to Section

                                      22
<PAGE>
 
          2.14 if any such conversion or continuation is effective on
          any day other than the last day of an Interest Period applicable to
          such Loans.
         
Each such  election  shall be made by delivering a notice (a "NOTICE OF INTEREST
RATE ELECTION") to the Administrative  Agent not later than 10:30 A.M. (New York
City  time) on the third  Euro-Dollar  Business  Day before  the  conversion  or
continuation  selected in such notice is to be  effective.  A Notice of Interest
Rate Election may, if it so specifies,  apply to only a portion of the aggregate
principal amount of the relevant Group of Loans;  provided that (i) such portion
is allocated  ratably among the Loans comprising such Group and (ii) the portion
to which such notice  applies,  and the  remaining  portion to which it does not
apply,  are each at least  $10,000,000  or any  larger  amount in  multiples  of
$1,000,000  (unless such  portion is  comprised of Base Rate Loans).  If no such
notice is timely  received before the end of an Interest Period for any Group of
Euro-Dollar  Loans, the Borrower shall be deemed to have elected that such Group
of Loans be converted to Base Rate Loans at the end of such Interest Period.

          (b)  Each Notice of Interest Rate Election shall specify:

               (i)   the Group of Loans (or portion thereof) to which such
          notice applies;

               (ii)  the date on which the conversion or continuation selected
          in such notice is to be effective, which shall comply with the
          applicable clause of subsection (a) above;

               (iii) if the Loans comprising such Group are to be converted, the
          new type of Loans and, if the Loans resulting from such conversion are
          to be Euro-Dollar Loans, the duration of the initial Interest Period
          applicable thereto; and

               (iv) if such Loans are to be continued as Euro-Dollar Loans for
          an additional Interest Period, the duration of such additional
          Interest Period.

Each  Interest  Period  specified in a Notice of Interest  Rate  Election  shall
comply with the provisions of the definition of Interest Period.

          (c)  Promptly after receiving a Notice of Interest Rate Election from
the Borrower pursuant to subsection (a) above, the Administrative Agent shall
notify each Bank of the contents thereof and such notice shall not thereafter be
revocable by the Borrower.

                                      23
<PAGE>
 
          (d)  The Borrower shall not be entitled to elect to convert any
Committed Loans to, or continue any Committed Loans for an additional Interest
Period as, Euro-Dollar Loans if (i) the aggregate principal amounts of any Group
of Euro- Dollar Loans created or continued as a result of such election would be
less than $10,000,000 or (ii) a Default shall have occurred and be continuing
when the Borrower delivers notice of such election to the Administrative Agent.

          SECTION 2.12. Optional  Prepayments.  (a)  Subject in the case of any
Euro-Dollar  Loan to Section 2.14, the Borrower may, in the case of the Group of
Base Rate Loans (or any Money Market Borrowing bearing interest at the Base Rate
pursuant to Section  8.01(a)),  upon at least one Domestic Business Day's notice
to the Administrative  Agent, prepay such Group or Borrowing,  or in the case of
any Group of Euro-Dollar  Loans, upon at least three Euro-Dollar  Business Days'
notice to the Administrative  Agent, prepay such Group, in each case in whole at
any time, or from time to time in part in amounts aggregating $10,000,000 or any
larger  multiple of  $1,000,000,  by paying the  principal  amount to be prepaid
together  with accrued  interest  thereon to the date of  prepayment.  Each such
optional  prepayment shall be applied to prepay ratably the Loans of the several
Banks included in such Group or Borrowing.

          (b)  Except as provided in Section 2.12(a), the Borrower may not
prepay all or any portion of the principal amount of any Money Market Loan prior
to the maturity thereof.

          (c)  Upon receipt of a notice of prepayment pursuant to this Section,
the Administrative Agent shall promptly notify each Bank of the contents thereof
and of such Bank's ratable share (if any) of such prepayment and such notice
shall not thereafter be revocable by the Borrower.

          SECTION 2.13. General Provisions as to Payments. (a) The Borrower
shall make each payment of principal of, and interest on, the Loans, of Letter
of Credit Liabilities and of fees hereunder, not later than 2:00 P.M. (New York
City time) on the date when due, in Federal or other funds immediately available
in New York City and in the lawful currency of the United States, to the
Administrative Agent at its address referred to in Section 10.01. The
Administrative Agent will promptly distribute to each Bank its ratable share of
each such payment received by the Administrative Agent for the account of the
Banks. Whenever any payment of principal of, or interest on, the Base Rate
Loans, of Letter of Credit Liabilities or of fees shall be due on a day which is
not a Domestic Business Day, the date for payment thereof shall be extended to
the next succeeding Domestic Business Day. Whenever any payment of principal of,
or interest on, the Euro-Dollar Loans shall be due on a day which is not a Euro-
Dollar Business Day, the date for payment thereof shall be extended to the 

                                      24
<PAGE>
 
next succeeding Euro-Dollar Business Day unless such Euro-Dollar Business Day
falls in another calendar month, in which case the date for payment thereof
shall be the next preceding Euro-Dollar Business Day. Whenever any payment of
principal of, or interest on, the Money Market Loans shall be due on a day which
is not a Euro-Dollar Business Day, the date for payment thereof shall be
extended to the next succeeding Euro-Dollar Business Day. If the date for any
payment of principal is extended by operation of law or otherwise, interest
thereon shall be payable for such extended time.

          (b)  Unless the Administrative Agent shall have received notice from
the Borrower prior to the date on which any payment is due to the Banks
hereunder that the Borrower will not make such payment in full, the
Administrative Agent may assume that the Borrower has made such payment in full
to the Administrative Agent on such date and the Administrative Agent may, in
reliance upon such assumption, cause to be distributed to each Bank on such due
date an amount equal to the amount then due such Bank. If and to the extent that
the Borrower shall not have so made such payment, each Bank shall repay to the
Administrative Agent forthwith on demand such amount distributed to such Bank
together with interest thereon, for each day from the date such amount is
distributed to such Bank until the date such Bank repays such amount to the
Administrative Agent, at the Federal Funds Rate.

          SECTION 2.14. Funding  Losses.  If the Borrower  makes any payment of
principal  with  respect  to any  Fixed  Rate  Loan or any  Fixed  Rate  Loan is
converted  to a  different  type  of  Loan  (pursuant  to  Article  2, 6 or 8 or
otherwise) on any day other than the last day of an Interest  Period  applicable
thereto,  or the last day of an  applicable  period  fixed  pursuant  to Section
2.07(c),  or if the Borrower  fails to borrow,  prepay,  convert or continue any
Fixed Rate Loans  after  notice  has been given to any Bank in  accordance  with
Section  2.04(a),  2.11(c) or 2.12(c),  the Borrower  shall  reimburse each Bank
within 15 days after demand for any resulting loss or expense incurred by it (or
by an  existing  or, in the case of the  failure of the  Borrower  to borrow any
Fixed Rate  Loans,  prospective  Participant  in the  related  Loan),  including
(without  limitation)  any loss incurred in obtaining,  liquidating or employing
deposits from third  parties,  but excluding loss of margin for the period after
any such  payment,  conversion  or  continuation  or failure to borrow,  prepay,
convert  or  continue,  provided  that such Bank  shall  have  delivered  to the
Borrower a  certificate  as to the amount of such loss or  expense  and  setting
forth the  calculation  thereof,  which  certificate  shall be conclusive in the
absence of manifest error.

          SECTION 2.15. Computation of Interest and Fees.  Interest based on the
Prime Rate  hereunder  shall be  computed on the basis of a year of 365 days (or
366  days in a leap  year)  and  paid  for the  actual  number  of days  elapsed
(including the 

                                      25
<PAGE>
 
first day but excluding the last day). All other interest and all facility and
Letter of Credit fees shall be computed on the basis of a year of 360 days and
paid for the actual number of days elapsed (including the first day but
excluding the last day).

          SECTION 2.16. Regulation  D  Compensation.  For so long  as any  Bank
maintains reserves against "Eurocurrency  liabilities" (or any other category of
liabilities  which includes  deposits by reference to which the interest rate on
Euro- Dollar Loans is  determined  or any  category of  extensions  of credit or
other assets which includes loans by a non-United  States office of such Bank to
United  States  residents),  and as a  result  the  cost  to such  Bank  (or its
Euro-Dollar  Lending Office) of making or maintaining  its Euro-Dollar  Loans is
increased,  then such Bank may  require the  Borrower to pay,  contemporaneously
with each payment of interest on the Euro-Dollar Loans,  additional  interest on
the  related  Euro-Dollar  Loan of such  Bank at a rate per  annum up to but not
exceeding the excess of (i) (A) the  applicable  London  Interbank  Offered Rate
divided  by (B) one  minus  the  Euro-Dollar  Reserve  Percentage  over (ii) the
applicable London Interbank Offered Rate. Any Bank wishing to require payment of
such additional interest (x) shall so notify the Borrower and the Administrative
Agent, in which case such additional  interest on the Euro-Dollar  Loans of such
Bank shall be payable to such Bank at the place  indicated  in such  notice with
respect to each Interest Period commencing at least three  Euro-Dollar  Business
Days after the giving of such  notice and (y) shall  furnish to the  Borrower at
least five  Euro-Dollar  Business  Days prior to each date on which  interest is
payable on the  Euro-Dollar  Loans an officer's  certificate  setting  forth the
amount to which such Bank is then  entitled  under this Section  (which shall be
consistent  with  such  Bank's  good  faith  estimate  of the level at which the
related  reserves  are  maintained  by  it).  Each  such  certificate  shall  be
accompanied by such information as the Borrower may reasonably request as to the
computation set forth therein.

          SECTION 2.17. Letters  of  Credit.  (a)  Subject  to  the  terms  and
conditions hereof, each Issuing Bank agrees to issue Letters of Credit hereunder
from time to time  before  the tenth day before  the  Termination  Date upon the
request of the Borrower;  provided that, immediately after each Letter of Credit
is issued,  (i) the aggregate amount of the Letter of Credit  Liabilities  shall
not exceed the Letter of Credit  Commitment and (ii) the aggregate amount of the
Letter of Credit Liabilities plus the aggregate  outstanding amount of all Loans
shall not  exceed  the  aggregate  amount of the  Commitments.  Upon the date of
issuance by an Issuing  Bank of a Letter of Credit,  the  Issuing  Bank shall be
deemed, without further action by any party hereto, to have sold to each Bank,
and each Bank shall be deemed, without further action by any party hereto, to
have purchased from the Issuing Bank, a participation in such Letter of Credit
and the related Letter of Credit Liabilities in the proportion their respective
Commitments bear to the aggregate Commitments.

                                      26
<PAGE>
 
     (b)  The Borrower shall give the Issuing Bank notice at least five Domestic
Business Days prior to the requested issuance of a Letter of Credit specifying
the date such Letter of Credit is to be issued, and describing the terms of such
Letter of Credit and the nature of the transactions to be supported thereby
(such notice, including any such notice given in connection with the extension
of a Letter of Credit, a "Notice of Issuance"). Upon receipt of a Notice of
Issuance, the Issuing Bank shall promptly notify the Agent, and the Agent shall
promptly notify each Bank of the contents thereof and of the amount of such
Bank's participation in such Letter of Credit. The issuance by the Issuing Bank
of each Letter of Credit shall, in addition to the conditions precedent set
forth in Article 3, be subject to the conditions precedent that such Letter of
Credit shall be in such form and contain such terms as shall be reasonably
satisfactory to the Issuing Bank and that the Borrower shall have executed and
delivered such other instruments and agreements relating to such Letter of
Credit as the Issuing Bank shall have reasonably requested. The Borrower shall
also pay to the Issuing Bank for its own account issuance, drawing, amendment
and extension charges in the amounts and at the times agreed between the
Borrower and the Issuing Bank. The extension or renewal of any Letter of Credit
shall be deemed to be an issuance of such Letter of Credit, and if any Letter of
Credit contains a provision pursuant to which it is deemed to be extended unless
notice of termination is given by the Issuing Bank, the Issuing Bank shall
timely give such notice of termination unless it has theretofore timely received
a Notice of Issuance and the other conditions to issuance of a Letter of Credit
have also theretofore been met with respect to such extension. No Letter of
Credit shall have a term extending or be so extendible beyond the fifth Domestic
Business Day preceding the Termination Date.

     (c)  Upon receipt from the beneficiary of any Letter of Credit of any
notice of a drawing under such Letter of Credit, the Issuing Bank shall notify
the Agent and the Agent shall promptly notify the Borrower and each other Bank
as to the amount to be paid as a result of such demand or drawing and the
payment date. The Borrower shall be irrevocably and unconditionally obligated
forthwith to reimburse the Issuing Bank for any amounts paid by the Issuing Bank
upon any drawing under any Letter of Credit, without presentment, demand,
protest or other formalities of any kind. All such amounts paid by the Issuing
Bank and remaining unpaid by the Borrower shall bear interest, payable on
demand, for each day until paid at a rate per annum equal to the sum of 2% plus
the rate applicable to Base Rate Loans for such day. In addition, each Bank will
pay to the Agent, for the account of the Issuing Bank, immediately upon the
Issuing Bank's demand at any time during the period commencing after such
drawing until reimbursement therefor in full by the Borrower, an amount equal to
such Bank's ratable share of such drawing (in proportion to its participation
therein), together with interest on such amount for each day from the date of
the Issuing Bank's demand for such payment (or, if such demand is made after
12:00 Noon (New York City time) on

                                      27
<PAGE>
 
such date, from the next succeeding Domestic Business Day) to the date of
payment by such Bank of such amount at a rate of interest per annum equal to the
Federal Funds Rate. The Issuing Bank will pay to each Bank ratably all amounts
received from the Borrower for application in payment of its reimbursement
obligations in respect of any Letter of Credit, but only to the extent such Bank
has made payment to the Issuing Bank in respect of such Letter of Credit
pursuant hereto.

     (d)  The obligations of the Borrower and each Bank under subsection (c)
above shall be absolute, unconditional and irrevocable, and shall be performed
strictly in accordance with the terms of this Agreement, under all circumstances
whatsoever, including without limitation the following circumstances:

          (i)   any lack of validity or enforceability of this Agreement or any
     Letter of Credit or any document related hereto or thereto;

          (ii)  any amendment, waiver of or any consent to departure from all or
     any of the provisions of this Agreement, any Letter of Credit or any
     document related hereto or thereto;

          (iii) the use which may be made of the Letter of Credit by, or any act
     or omission of, a beneficiary of a Letter of Credit (or any Person for whom
     the beneficiary may be acting);

          (iv)  the existence of any claim, set-off, defense or other rights
     that the Borrower may have at any time against a beneficiary of a Letter of
     Credit (or any Person for whom the beneficiary may be acting), the Banks
     (including the Issuing Bank) or any other Person, whether in connection
     with this Agreement or the Letter of Credit or any document related hereto
     or thereto or any unrelated transaction;

          (v)   any statement or any other document presented under a Letter of
     Credit proving to be forged, fraudulent or invalid in any respect or any
     statement therein being untrue or inaccurate in any respect whatsoever;

          (vi)  payment under a Letter of Credit to the beneficiary of such
     Letter of Credit against presentation to the Issuing Bank of a draft or
     certificate that does not comply with the terms of the Letter of Credit; or

          (vii) any other act or omission to act or delay of any kind by any
     Bank (including the Issuing Bank), the Agent or any other Person or any
     other event or circumstance whatsoever that might, but for the provisions

                                      28
<PAGE>
 
          of this subsection (vii), constitute a legal or equitable discharge of
          the Borrower's or the Bank's obligations hereunder.

          (e)  The Borrower hereby indemnifies and holds harmless each Bank
(including each Issuing Bank) and the Agent from and against any and all claims,
damages, losses, liabilities, costs or expenses which such Bank or the Agent may
incur (including, without limitation, any claims, damages, losses, liabilities,
costs or expenses which the Issuing Bank may incur by reason of or in connection
with the failure of any other Bank to fulfill or comply with its obligations to
such Issuing Bank hereunder (but nothing herein contained shall affect any
rights the Borrower may have against such defaulting Bank)), and none of the
Banks (including an Issuing Bank) nor the Agent nor any of their officers or
directors or employees or agents shall be liable or responsible, by reason of or
in connection with the execution and delivery or transfer of or payment or
failure to pay under any Letter of Credit, including without limitation any of
the circumstances enumerated in subsection (d) above, as well as (i) any error,
omission, interruption or delay in transmission or delivery of any messages, by
mail, cable, telegraph, telex or otherwise, (ii) any error in interpretation of
technical terms, (iii) any loss or delay in the transmission of any document
required in order to make a drawing under a Letter of Credit, (iv) any
consequences arising from causes beyond the control of an Issuing Bank,
including without limitation any government acts, or any other circumstances
whatsoever in making or failing to make payment under such Letter of Credit;
provided that the Borrower shall not be required to indemnify any Issuing Bank
for any claims, damages, losses, liabilities, costs or expenses, and the
Borrower shall have a claim for direct (but not consequential) damage suffered
by it, to the extent found by a court of competent jurisdiction to have been
caused by (x) the failure of such Issuing Bank to meet the standards prescribed
by the UCP in determining whether a request presented under any Letter of Credit
complied with the terms of such Letter of Credit or (y) such Issuing Bank's
failure to pay under any Letter of Credit after the presentation to it of a
request strictly complying with the terms and conditions of such Letter of
Credit. Nothing in this subsection (e) is intended to limit the obligations of
the Borrower under Section 2.17(c) of this Agreement. To the extent the Borrower
is obligated to but does not indemnify an Issuing Bank as required by this
subsection, the Banks agree to do so ratably in accordance with their
Commitments.

                                      29
<PAGE>
 
                                   ARTICLE 3
                                  CONDITIONS

          SECTION 3.01. Closing.  The  closing  hereunder  shall occur upon (x)
termination of the Commitments (as defined in the Credit  Agreement  referred to
below in this clause (x)) under the Credit  Agreement  dated as of November  15,
1996 among the  Borrower,  ACE  Insurance,  CODA,  the banks listed  therein and
Morgan Guaranty Trust Company of New York, as administrative  agent, and payment
in  full  of all  amounts  owing  thereunder  to  any  of  such  banks  or  such
administrative  agent  and  (y)  receipt  by  the  Administrative  Agent  of the
following documents, each dated the Closing Date unless otherwise indicated:

          (a)  a duly executed Note for the account of each Bank dated on or
before the Closing Date complying with the provisions of Section 2.05;

          (b)  an opinion of Maples and Calder, counsel for the Borrower,
substantially in the form of Exhibit E hereto and covering such additional
matters relating to the transactions contemplated hereby as the Required Banks
may reasonably request;

          (c)  an opinion of Conyers, Dill & Pearman, special Bermuda counsel
for the Guarantors, substantially in the form of Exhibit F hereto and covering
such additional matters relating to the transactions contemplated hereby as the
Required Banks may reasonably request;

          (d)  an opinion of Mayer, Brown & Platt, New York counsel for the
Borrower and the Guarantors, substantially in the form of Exhibit G hereto and
covering such additional matters relating to the transactions contemplated
hereby as the Required Banks may reasonably request;

          (e)  an opinion of Davis Polk & Wardwell, special United States
counsel for the Agents, substantially in the form of Exhibit H hereto and
covering such additional matters relating to the transactions contemplated
hereby as the Required Banks may reasonably request;

          (f)  a letter from CT System in New York, New York, substantially in
the form of Exhibit J hereto, evidencing CT System's agreement to act as agent
for service of process for the Obligors pursuant to Section 10.10(b); and

          (g)  all documents the Administrative Agent may reasonably request
relating to the existence of the Borrower and the Guarantors, the corporate
authority for and the validity of this Agreement and the Notes, and any other

                                      30
<PAGE>
 
matters relevant hereto, all in form and substance satisfactory to the
Administrative Agent.

The Administrative Agent shall promptly notify the Borrower and the Banks of the
Closing  Date,  and such notice shall be  conclusive  and binding on all parties
hereto.

          SECTION 3.02. Borrowings  and  Issuances  of Letters  of Credit.  The
obligation  of any Bank to make a Loan on the occasion of any  Borrowing and the
obligation  of an  Issuing  Bank to issue (or  renew or extend  the term of) any
Letter of Credit is subject to the satisfaction of the following conditions:

          (a)  the fact that the Closing Date shall have occurred on or prior to
December 31, 1997;

          (b)  receipt by the Administrative Agent of a Notice of Borrowing as
required by Section 2.02 or 2.03 or receipt by the Issuing Bank of a Notice of
Issuance as required by Section 2.17(b), as the case may be;

          (c)  the fact that, immediately after such Borrowing or issuance of a
Letter of Credit, the sum of the aggregate outstanding principal amount of the
Loans and the aggregate amount of Letter of Credit Liabilities will not exceed
the aggregate amount of the Commitments;

          (d)  the fact that, immediately before and after such Borrowing or
issuance of a Letter of Credit, no Default shall have occurred and be
continuing;

          (e)  the fact that the representations and warranties of the Borrower
contained in this Agreement shall be true on and as of the date of such
Borrowing or issuance of a Letter of Credit; and

          (f)  in the case of an issuance of a Letter of Credit, the fact that,
immediately after such issuance of a Letter of Credit, the aggregate amount of
the Letter of Credit Liabilities shall not exceed the Letter of Credit
Commitment.

Each Borrowing and issuance of a Letter of Credit  hereunder  shall be deemed to
be a  representation  and warranty by the Obligors on the date of such Borrowing
or issuance as to the facts  specified in clauses (c),  (d), (e) and (f) of this
Section.

                                      31
<PAGE>
 
                                   ARTICLE 4

                        REPRESENTATIONS AND WARRANTIES

     The Obligors jointly and severally represent and warrant that:

     SECTION 4.01.  Corporate Existence and Power. The Borrower is a company
limited by shares and each of the Guarantors is a limited liability company, in
each case duly incorporated and validly existing under the laws of its
jurisdiction of incorporation and the Borrower is in good standing under the
laws of the Cayman Islands. Each of the Obligors has all corporate powers and
all material governmental licenses, authorizations, consents and approvals
required to carry on its respective business as now conducted. Each of the
Guarantors is a Wholly-Owned Consolidated Subsidiary of the Borrower.

     SECTION 4.02.  Corporate and Governmental Authorization; No Contravention.
The execution, delivery and performance by each Obligor of this Agreement and by
the Borrower of the Notes are within its corporate powers, have been duly
authorized by all necessary corporate action, require no action or consent by or
in respect of, or filing with, any governmental body, agency or official and do
not contravene, or constitute a default under, any provision of applicable law
or regulation or of the Memorandum of Association, Articles of Association or
Bye-Laws (or any comparable document) of any Obligor or of any agreement,
judgment, injunction, order, decree or other instrument binding upon any Obligor
or any of their respective Subsidiaries or result in the creation or imposition
of any Lien on any asset of any Obligor or any of their respective Subsidiaries.

     SECTION 4.03.  Binding Effect. This Agreement constitutes a valid and
binding agreement of each Obligor and each Note, when executed and delivered in
accordance with this Agreement, will constitute a valid and binding obligation
of the Borrower, in each case enforceable in accordance with its terms.

     SECTION 4.04.  Financial Information. (a) The consolidated balance sheet of
the Borrower and its Consolidated Subsidiaries as of September 30, 1996 and the
related consolidated statements of operations, shareholders' equity and cash
flows for the fiscal year then ended, reported on by Coopers & Lybrand LLP,
copies of which have been delivered to each of the Banks, fairly present, in all
material respects, in conformity with generally accepted accounting principles,
the consolidated financial position of the Borrower and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
cash flows for such fiscal year.

                                      32
<PAGE>
 
     (b)  The unaudited consolidated balance sheet of the Borrower and its
Consolidated Subsidiaries as of June 30, 1997 and the related unaudited
consolidated statements of operations and cash flows for the nine months then
ended, copies of which have been delivered to each of the Banks, fairly present,
in all material respects, in conformity with generally accepted accounting
principles (except for the absence of footnotes) applied on a basis consistent
with the financial statements referred to in subsection (a) of this Section, the
consolidated financial position of the Borrower and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
cash flows for such nine month period (subject to normal year-end adjustments).

     (c)  Since June 30, 1997 there has been no material adverse change in the
business, financial position, or results of operations of the Borrower and its
Consolidated Subsidiaries, considered as a whole.

     (d)  The consolidated balance sheet of ACE Insurance and its Consolidated
Subsidiaries as of September 30, 1996 and the related consolidated statements of
operations and retained earnings and of cash flows for the fiscal year then
ended, all reported on by Coopers & Lybrand LLP, copies of which have been
delivered to each of the Banks, fairly present, in all material respects, in
conformity with generally accepted accounting principles, the consolidated
financial position of ACE Insurance and its Consolidated Subsidiaries as of such
date and their consolidated results of operations and retained earnings and cash
flows for such fiscal year.

     (e)  Since September 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of ACE Insurance and
its Consolidated Subsidiaries, considered as a whole.

     (f)  The balance sheet of CODA as of September 30, 1996 and the related
statements of operations and retained earnings and of cash flows for the fiscal
year then ended, all reported on by Coopers & Lybrand LLP, copies of which have
been delivered to each of the Banks, fairly present, in all material respects,
in conformity with generally accepted accounting principles, the financial
position of CODA as of such date and its results of operations and retained
earnings and cash flows for such fiscal year.

     (g)  Since September 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of CODA.

     (h)  The balance sheet of Tempest as of November 30, 1996 and the related
statements of operations and retained earnings and of cash flows for the fiscal
year then ended, all reported on by Coopers & Lybrand LLP, copies of

                                      33
<PAGE>
 
which have been delivered to each of the Banks, fairly present, in all material
respects, in conformity with generally accepted accounting principles, the
financial position of Tempest as of such date and its results of operations and
retained earnings and cash flows for such fiscal year.

          (i) Since November 30, 1996 there has been no material adverse change
in the business, financial position or results of operations of Tempest.

         SECTION 4.05. Litigation. Except as disclosed in the notes to the
financial statements referred to in Section 4.04(a), there is no action, suit or
proceeding pending against, or to the knowledge of the Borrower threatened
against or affecting, the Borrower or any of its Subsidiaries before any court
or arbitrator or any governmental body, agency or official in which there is a
reasonable likelihood of an adverse decision which could materially adversely
affect the business, consolidated financial position or consolidated results of
operations of the Borrower and its Consolidated Subsidiaries, considered as a
whole, or which in any manner draws into question the validity of this Agreement
or the Notes.

         SECTION 4.06. ERISA. Neither the Borrower, nor any Guarantor, nor any
member of their respective ERISA Groups, maintains or contributes to, or has
within the previous six years (whether or not while a member of such Person's
current ERISA Group) maintained or contributed to, or been required to maintain
or been jointly and severally liable for contributions to, or liability upon
withdrawal from, any plan or arrangement subject to (i) the minimum funding
standards of ERISA and the Internal Revenue Code, (ii) Part 3 of Subtitle B of
Title I of ERISA or (iii) Title IV of ERISA.

         SECTION 4.07. Taxes. The Borrower and its Subsidiaries have filed all
income tax returns and all other material tax returns which are required to be
filed by them and have paid all taxes due pursuant to such returns or pursuant
to any assessment received by the Borrower or any Subsidiary. The charges,
accruals and reserves on the books of the Borrower and its Subsidiaries in
respect of taxes or other governmental charges are, in the opinion of the
Borrower, adequate.

         SECTION 4.08. Not an Investment Company. No Obligor is an "investment
company" within the meaning of the Investment Company Act of 1940, as amended.

         SECTION 4.09. Full Disclosure. All written information heretofore
furnished by the Obligors to the Administrative Agent or any Bank for purposes
of or in connection with this Agreement or any transaction contemplated hereby
is, and all such information hereafter furnished by the Borrower to the
Administrative Agent or any Bank will be, true and accurate in all material

                                       34
<PAGE>
 
respects on the date as of which such information is stated or certified. The
Borrower has disclosed to the Banks in writing any and all facts which
materially and adversely affect or may affect (to the extent the Obligors can
now reasonably foresee) the business, operations or financial condition of any
Obligor and its Consolidated Subsidiaries, taken as a whole, or the ability of
any Obligor to perform its obligations under this Agreement.

         SECTION 4.10. Compliance with Laws. The Borrower and each Subsidiary
are in compliance, in all material respects, with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Borrower and its Consolidated
Subsidiaries, considered as a whole.

                                   ARTICLE 5
                                   COVENANTS

         The Borrower agrees that, so long as any Bank has any Commitment
hereunder or any Letter of Credit Liability or any amount payable under any Note
remains unpaid:

         SECTION 5.01. Information. The Borrower will deliver to each of the
Banks:

          (a) as soon as available and in any event within 90 days after the end
of each fiscal year of the Borrower, a consolidated balance sheet of the
Borrower and its Consolidated Subsidiaries as of the end of such fiscal year and
the related consolidated statements of operations, shareholders' equity and cash
flows for such fiscal year, setting forth in each case in comparative form the
figures for the previous fiscal year, all reported on in a manner acceptable to
the Securities and Exchange Commission or otherwise reasonably acceptable to the
Required Banks by Coopers & Lybrand LLP or other independent public accountants
of nationally recognized standing;

          (b) as soon as available and in any event within 45 days after the end
of each of the first three quarters of each fiscal year of the Borrower, a
consolidated balance sheet of the Borrower and its Consolidated Subsidiaries as
of the end of such quarter and the related consolidated statements of operations
and cash flows for such quarter and for the portion of the Borrower's fiscal
year ended at the end

                                       35
<PAGE>
 
of such quarter, setting forth in the case of such statements of operations and
cash flows in comparative form the figures for the corresponding quarter and the
corresponding portion of the Borrower's previous fiscal year, all certified
(subject to normal year-end adjustments) as to fairness of presentation,
generally accepted accounting principles and consistency by the chief financial
officer or the chief accounting officer of the Borrower;

          (c)  simultaneously with the delivery of each set of financial
statements referred to in clauses (a) and (b) above, a certificate of the chief
financial officer or the chief accounting officer of the Borrower (i) setting
forth in reasonable detail the calculations required to establish whether the
Borrower was in compliance with the requirements of Sections 5.07 to 5.10,
inclusive, on the date of such financial statements and (ii) stating whether any
Default exists on the date of such certificate and, if any Default then exists,
setting forth the details thereof and the action which the Borrower is taking or
proposes to take with respect thereto;

          (d)  within five days after any executive officer of the Borrower
obtains knowledge of any Default, if such Default is then continuing, a
certificate of the chief financial officer or the chief accounting officer of
the Borrower setting forth the details thereof and the action which the Borrower
is taking or proposes to take with respect thereto;

          (e)  promptly upon the mailing thereof to the shareholders of the
Borrower generally, copies of all financial statements, reports and proxy
statements so mailed;

          (f)  promptly upon the filing thereof, copies of all registration
statements (other than the exhibits thereto and any registration statements on
Form S-8 or its equivalent) and reports on Forms 10-K, 10-Q and 8-K (or their
equivalents) which the Borrower shall have filed with the Securities and
Exchange Commission;

          (g)  as soon as available and in any event within 20 days after
submission, each statutory statement of the Guarantors (or any of them) in the
form submitted to The Insurance Division of the Office of Registrar of Companies
of Bermuda;

          (h)  as soon as available and in any event within 120 days after the
end of each fiscal year of each Guarantor, a consolidated balance sheet of each
Guarantor and its Subsidiaries (if any) as of the end of such fiscal year and
the related statements of income and changes in financial position for such
fiscal year, setting forth in each case in comparative form the figures for the
previous fiscal year, all reported on by the independent public accountants
which reported on the financial statements referred to in clause (a) above;

                                       36
<PAGE>
 
     (i)  promptly after any executive officer of the Borrower obtains knowledge
thereof, (i) a copy of any notice from the Minister of Finance or the Registrar
of Companies or any other Person of the revocation, the suspension or the
placing of any restriction or condition on the registration as an insurer of any
Guarantor under the Bermuda Insurance Law or of the institution of any
proceeding or investigation which could result in any such revocation,
suspension or placing of such a restriction or condition, (ii) copies of any
correspondence by, to or concerning any Guarantor relating to an investigation
conducted by the Minister of Finance, whether pursuant to Section 132 of the
Bermuda Companies Law or otherwise and (iii) a copy of any notice of or
requesting or otherwise relating to the winding up or any similar proceeding of
or with respect to either Guarantor; and

     (j)  from time to time such additional information regarding the financial
position, results of operations or business of the Borrower or any of its
Subsidiaries as the Administrative Agent, at the request of any Bank, may
reasonably request from time to time.

     SECTION 5.02. Payment of Obligations. The Borrower will pay and discharge,
and will cause each Subsidiary to pay and discharge, at or before maturity, all
their respective material obligations and liabilities, including, without
limitation, tax liabilities, except where the same may be contested in good
faith by appropriate proceedings, and will maintain, and will cause each
Subsidiary to maintain, in accordance with generally accepted accounting
principles, appropriate reserves for the accrual of any of the same.

     SECTION 5.03. Maintenance of Property; Insurance. (a) The Borrower will
keep, and will cause each Subsidiary to keep, all property useful and necessary
in its business in good working order and condition, ordinary wear and tear
excepted.

     (b)  The Borrower will maintain, and will cause each Subsidiary to
maintain, physical damage insurance on all real and personal property on an all
risks basis (including the perils of flood and quake), covering the repair and
replacement cost of all such property and consequential loss coverage for
business interruption and extra expense. The Borrower will deliver to the Banks
upon request of any Bank through the Administrative Agent from time to time,
full information as to the insurance carried.

     SECTION 5.04. Conduct of Business and Maintenance of Existence. The
Borrower will continue, and will cause each Subsidiary to continue, to engage in
business of the same general type as now conducted by the Borrower and its

                                      37
<PAGE>
 
Subsidiaries, and will preserve, renew and keep in full force and effect, and
will cause each Subsidiary to preserve, renew and keep in full force and effect,
their respective existence and their respective rights, privileges and
franchises necessary or desirable in the normal conduct of business; provided
that nothing in this Section 5.04 shall prohibit (i) the merger of a Subsidiary
(other than a Guarantor) into the Borrower or the merger or consolidation of a
Subsidiary (other than a Guarantor) with or into another Person if the
corporation surviving such consolidation or merger is a Subsidiary and if, in
each case, after giving effect thereto, no Default shall have occurred and be
continuing, (ii) any merger of an Obligor permitted by Section 5.11 or (iii) the
termination of the corporate existence of any Subsidiary (other than a
Guarantor) if the Borrower in good faith determines that such termination is in
the best interest of the Borrower and is not materially disadvantageous to the
Banks.

         SECTION 5.05. Compliance with Laws. The Borrower will comply, and cause
each Subsidiary to comply, in all material respects with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Borrower and its Consolidated
Subsidiaries, considered as a whole..

         SECTION 5.06. Inspection of Property, Book and Records. The Borrower
will keep, and will cause each Subsidiary to keep, proper books of record and
account in accordance with generally accepted accounting principles in which
full, true and correct entries shall be made of all dealings and transactions in
relation to its business and activities; and will permit, and will cause each
Subsidiary to permit, representatives of any Bank at such Bank's expense to
visit and inspect any of their respective properties, to examine and make
abstracts from any of their respective books and records and to discuss their
respective affairs, finances and accounts with their respective officers,
employees and independent public accountants, all at such reasonable times and
as often as may reasonably be desired.

         SECTION 5.07. Leverage. Consolidated Debt will at no time exceed 35% of
Consolidated Tangible Net Worth.

         SECTION 5.08. Subsidiary Debt. The Borrower will not permit any of its
Subsidiaries to create, assume or suffer to exist any Debt, except (i) Debt
under the Related Documents, (ii) Debt owing to the Borrower or a Wholly-Owned

                                       38
<PAGE>
 
Consolidated Subsidiary, (iii) Debt of Tripar Partnership, a Bermuda general
partnership, owing to other Subsidiaries or Debt of such other Subsidiaries
owing to Tripar Partnership, (iv) Debt in respect of letters of credit issued in
the ordinary course of business, (v) Debt created by exercise of overdraft
privileges on a basis not more frequent than once each calendar month for not
more than five Euro- Dollar Business Days in an amount not to exceed $50,000,000
in the aggregate at any one time, (vi) subordinated Debt of ACE US owing to ACE
Insurance, (vii) Debt in an amount not to exceed $70,000,000 incurred in
connection with the development by the Borrower and/or any of its Subsidiaries
of the "Bermudiana Site" in Hamilton, Bermuda and (viii) Debt not permitted by
the foregoing clauses of this Section in an aggregate principal amount not to
exceed $20,000,000 at any time outstanding.

         SECTION 5.09. Minimum Tangible Net Worth. Consolidated Tangible Net
Worth will at no time be less than (i) $1,400,000,000 plus (ii) 25% of
Consolidated Net Income for each fiscal quarter of the Borrower ended after
December 31, 1997 and on or prior to such date of determination and for which
such Consolidated Net Income is positive (but with no deduction on account of
any fiscal quarter for which Consolidated Net Income is negative) plus (iii) 50%
of the aggregate amount by which Consolidated Tangible Net Worth shall have been
increased by reason of the issuance and sale after the Effective Date and on or
prior to such date of determination of any capital stock or the conversion or
exchange of any Debt of the Borrower into or with capital stock of the Borrower
consummated after the Effective Date and on or prior to such date of
determination.

         SECTION 5.10. Negative Pledge. Neither the Borrower nor any Subsidiary
will create, assume or suffer to exist any Lien on any asset now owned or
hereafter acquired by it, except:

         (a) Liens existing on the date of this Agreement securing Debt
outstanding on the date of this Agreement in an aggregate principal or face
amount not exceeding $25,000,000;

         (b) any Lien existing on any asset of any corporation at the time such
corporation becomes a Subsidiary and not created in contemplation of such event;

         (c) any Lien on any asset securing Debt incurred or assumed for the
purpose of financing all or any part of the cost of acquiring such asset,
provided

                                      39
<PAGE>
 

that such Lien attaches to such asset concurrently with or within 90 days after
the acquisition thereof;

     (d) any Lien on any asset of any corporation existing at the time such
corporation is merged or consolidated with or into the Borrower or a Subsidiary
and not created in contemplation of such event;

     (e) any Lien existing on any asset prior to the acquisition thereof by the
Borrower or a Subsidiary and not created in contemplation of such acquisition;

     (f) any Lien arising out of the refinancing, extension, renewal or
refunding of any Debt secured by any Lien permitted by any of the foregoing
clauses of this Section, provided that such Debt is not increased and is not
secured by any additional assets;

     (g) Liens arising in the ordinary course of its business which (i) do not
secure Debt or Derivatives Obligations, (ii) do not secure any obligation in an
amount exceeding $25,000,000 and (iii) do not in the aggregate materially
detract from the value of its assets or materially impair the use thereof in the
operation of its business;

     (h) Liens on cash and cash equivalents securing Derivatives Obligations,
provided that the aggregate amount of cash and cash equivalents subject to such
Liens may at no time exceed $25,000,000;

     (i) Liens securing obligations in respect of letters of credit issued
pursuant to any of the Related Documents; and

     (j) Liens not otherwise permitted by the foregoing clauses of this Section
securing Debt in an aggregate principal or face amount at any date not to exceed
10% of Consolidated Tangible Net Worth.

     Section 5.11. Consolidations, Mergers and Sales of Assets. No Obligor will
(i) consolidate with or merge into any other Person or (ii) sell, lease or
otherwise transfer, directly or indirectly, all or any substantial part of its
assets to any other Person; provided that if both immediately before and after
giving effect thereto no Default shall have occurred and be continuing, then (A)
any Guarantor may merge or consolidate with any other Person so long as the
surviving entity is the Guarantor or a Wholly-Owned Consolidated Subsidiary and,
if such Guarantor is not the surviving entity, such surviving entity shall have
assumed the obligations of such Guarantor hereunder pursuant to an instrument in
form and substance reasonably satisfactory to the Required Banks and shall have
delivered such opinions of counsel with respect thereto as the Administrative
Agent may

                                      40
<PAGE>
 
reasonably request and (B) the Borrower may merge with another Person so long as
the Borrower is the surviving entity.

     Section 5.12.  Use of Proceeds.  The proceeds of the Loans made under this
Agreement will be used by the Borrower for its general corporate purposes. None
of such proceeds will be used, directly or indirectly, for the purpose, whether
immediate, incidental or ultimate, of buying or carrying any "margin stock"
within the meaning of Regulation U.

     Section 5.13.  ERISA.  Neither the Borrower, nor any Guarantor, nor any
member of their respective ERISA Groups will maintain or contribute to, or
become obligated to maintain or become jointly and severally liable for
contributions to, or have liability upon withdrawal from, any plan or
arrangement subject to (i) the minimum funding standards of ERISA and the
Internal Revenue Code, (ii) Part 3 of Subtitle B of Title I of ERISA or (iii)
Title IV of ERISA.


                                   ARTICLE 6

                                    Defaults

     Section 6.01.  Events of Default.  If one or more of the following events
("Events of Default") shall have occurred and be continuing:

     (a)  the Borrower shall fail to reimburse any drawing under any Letter of
Credit when required hereunder or to pay when due any principal of any Loan or
shall fail to pay within five Business Days of the due date thereof any interest
on any Loan, any fees or any other amount payable hereunder or any Guarantor
shall fail to pay when due any such principal, interest, fees or other amount
payable hereunder; provided that, for purposes of this Section 6.01(a), no such
payment default by the Borrower shall be continuing if the Guarantors pay the
amount thereof at the time and otherwise in the manner provided in Article 9;

     (b)  the Borrower shall fail to observe or perform any covenant contained
in Sections 5.07 through 5.12, inclusive;

     (c)  the Borrower shall fail to observe or perform any covenant or
agreement contained in this Agreement (other than those covered by clause (a) or
(b) above) for 30 days after notice thereof has been given to the Borrower by
the Administrative Agent at the request of any Bank;

                                       41
<PAGE>
 
     (d)  any representation, warranty, certification or statement made by any
Obligor in this Agreement or in any certificate, financial statement or other
document delivered pursuant to this Agreement shall prove to have been incorrect
in any material respect when made (or deemed made);

     (e)  the Borrower or any Subsidiary shall fail to make any payment in
respect of any Material Financial Obligations when due or within any applicable
grace period;

     (f)  any event or condition shall occur which results in the acceleration
of the maturity of any Material Debt or enables (or, with the giving of notice
or lapse of time or both, would enable) the holder of such Debt or any Person
acting on such holder's behalf to accelerate the maturity thereof; or, without
limiting the foregoing, any "Event of Default" (as defined in any of the other
Related Documents) shall occur;

     (g)  (i)(x) a resolution or other similar action is passed authorizing
the voluntary winding up of the Borrower or any other similar action with
respect to the Borrower or a petition is filed for the winding up of the
Borrower or the taking of any other similar action with respect to the Borrower
in the Grand Court of the Cayman Islands or (y) any corporate action is taken
authorizing the winding up, the liquidation, any arrangement or the taking of
any other similar action of or with respect to any Guarantor or authorizing any
corporate action to be taken to facilitate any such winding up, liquidation,
arrangement or other similar action or any petition shall be filed seeking the
winding up, the liquidation, any arrangement or the taking of any other similar
action of or with respect to any Guarantor by the Registrar of Companies in
Bermuda, one or more holders of insurance policies or reinsurance certificates
issued by any Guarantor or by any other Person or Persons or any petition shall
be presented for the winding up of any Guarantor to a court of Bermuda as
provided under the Bermuda Companies Law and in either such case such petition
shall remain undismissed and unstayed for a period of 60 days or any creditors'
or members' voluntary winding up of any Guarantor as provided under the Bermuda
Companies Law shall be commenced or any receiver shall be appointed by a
creditor of any Guarantor or by a court of Bermuda on the application of a
creditor of any Guarantor as provided under any instrument giving rights for the
appointment of a receiver;

     (ii)  a proceeding shall be commenced by any Person seeking the
rehabilitation, liquidation, dissolution or conservation of the assets of any
Guarantor or any substantial part thereof or any similar remedy and such
proceedings shall remain undismissed and unstayed for a period of 60 days;

                                       42
<PAGE>
 
     (iii) the Borrower or any Subsidiary shall commence a voluntary case or
other proceeding seeking liquidation, reorganization or other relief with
respect to itself or its debts under any bankruptcy, insolvency or other similar
law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, or shall consent to any such relief or to the
appointment of or taking possession by any such official in an involuntary case
or other proceeding commenced against it, or shall make a general assignment for
the benefit of creditors, or shall fail generally to pay its debts as they
become due, or shall take any corporate action to authorize any of the
foregoing; or

     (iv)  an involuntary case or other proceeding shall be commenced against
the Borrower or any Subsidiary seeking liquidation, reorganization or other
relief with respect to it or its debts under any bankruptcy, insolvency or other
similar law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 days; or an order for
relief shall be entered against the Borrower or any Subsidiary under the United
States federal bankruptcy laws as now or hereafter in effect;

     (h)  a judgment or order for the payment of money in excess of $25,000,000
shall be rendered against the Borrower or any Subsidiary and such judgment or
order shall continue unsatisfied and unstayed for a period of 45 days;

     (i)  any person or group of persons (within the meaning of Section 13 or
14 of the Securities Exchange Act of 1934, as amended) shall have acquired
beneficial ownership (within the meaning of Rule 13d-3 promulgated by the
Securities and Exchange Commission under said Act) of 30% or more of the
outstanding shares of voting stock of the Borrower; or, during any period of 12
consecutive calendar months, individuals who were directors of the Borrower on
the first day of such period shall cease to constitute a majority of the board
of directors of the Borrower; or any Guarantor shall cease to be a Wholly-Owned
Consolidated Subsidiary of the Borrower;

     (j)  any court or arbitrator or any governmental body, agency or official
which has jurisdiction in the matter shall decide, rule or order that any
provision of any of the Financing Documents is invalid or unenforceable in any
material respect, or any Obligor shall so assert in writing; or

     (k)  the registration of any Guarantor as an insurer shall be revoked,
suspended or otherwise have restrictions or conditions placed upon it unless, in
the case of the placing of any such restrictions or conditions, such
restrictions or

                                      43
<PAGE>
 
conditions could not have a material adverse effect on the interests of the
Administrative Agent and the Banks under the Financing Documents;

then, and in every such event, the Administrative Agent shall (i) if requested
by Banks having more than 50% in aggregate amount of the Commitments, by notice
to the Borrower terminate the Commitments and they shall thereupon terminate,
and (ii) if requested by Banks holding Notes evidencing more than 50% in
aggregate principal amount of the Loans, by notice to the Borrower declare the
Notes (together with accrued interest thereon) to be, and the Notes (together
with accrued interest thereon) shall thereupon become, immediately due and
payable without presentment, demand, protest or other notice of any kind, all of
which are hereby waived by the Obligors; provided that in the case of any of the
Events of Default specified in clause (g) above with respect to any Obligor,
without any notice to any Obligor or any other act by the Administrative Agent
or the Banks, the Commitments shall thereupon terminate and the Notes (together
with accrued interest thereon) shall become immediately due and payable without
presentment, demand, protest or other notice of any kind, all of which are
hereby waived by the Obligors.

     Section 6.02.  Notice of Default.  The Administrative Agent shall give
notice to the Borrower under Section 6.01(c) promptly upon being requested to do
so by any Bank and shall thereupon notify all the Banks thereof.

     Section 6.03.  Cash Cover.  The Borrower agrees, in addition to the
provisions of Section 6.01 hereof, that upon the occurrence and during the
continuance of any Event of Default, it shall, if requested by the
Administrative Agent upon the instruction of the Banks having more than 50% in
the aggregate amount of the Commitments (or, if the Commitments shall have been
terminated, holding more than 50% of the Letter of Credit Liabilities),
forthwith pay to the Administrative Agent an amount in immediately available
funds (which funds shall be held as collateral pursuant to arrangements
satisfactory to the Administrative Agent) equal to the aggregate amount
available for drawing under all Letters of Credit then outstanding at such time,
provided that, upon the occurrence of any Event of Default specified in Section
6.01(g) with respect to the Borrower, the Borrower shall pay such amount
forthwith without any notice or demand or any other act by the Administrative
Agent or the Banks.

                                       44
<PAGE>
 
                                   ARTICLE 7

                                   The Agents

     Section 7.01.  Appointment and Authorization.  Each Bank irrevocably
appoints and authorizes the Administrative Agent to take such action as agent on
its behalf and to exercise such powers under the Financing Documents as are
delegated to the Administrative Agent by the terms hereof and thereof, together
with all such powers as are reasonably incidental thereto.

     Section 7.02.  Administrative Agent and Affiliates.  Morgan Guaranty Trust
Company of New York shall have the same rights and powers under this Agreement
as any other Bank and may exercise or refrain from exercising the same as though
it were not the Administrative Agent, and Morgan Guaranty Trust Company of New
York and its affiliates may accept deposits from, lend money to, and generally
engage in any kind of business with the Borrower or any Subsidiary or affiliate
of the Borrower as if it were not the Administrative Agent hereunder.

     Section 7.03.  Action by Administrative Agent.  The obligations of the
Administrative Agent under this Agreement are only those expressly set forth
herein. Without limiting the generality of the foregoing, the Administrative
Agent shall not be required to take any action with respect to any Default,
except as expressly provided in Article 6.

     Section 7.04.  Consultation with Experts.  The Administrative Agent may
consult with legal counsel (who may be counsel for any Obligor), independent
public accountants and other experts selected by it and shall not be liable for
any action taken or omitted to be taken by it in good faith in accordance with
the advice of such counsel, accountants or experts.

     Section 7.05.  Liability of Administrative Agent.  Neither the
Administrative Agent nor any of its affiliates nor any of their respective
directors, officers, agents or employees shall be liable for any action taken or
not taken by it in connection herewith (i) with the consent or at the request of
the Required Banks (or such different number of Banks as any provision hereof
expressly requires for such consent or request) or (ii) in the absence of its
own gross negligence or willful misconduct. Neither the Administrative Agent nor
any of its affiliates nor any of their respective directors, officers, agents or
employees shall be responsible for or have any duty to ascertain, inquire into
or verify (i) any statement, warranty or representation made in connection with
the Financing Documents or any borrowing hereunder; (ii) the performance or
observance of any of the covenants or agreements of any Obligor; (iii) the
satisfaction of any condition specified in Article 3, except receipt of items
required to be delivered to the Administrative

                                       45
<PAGE>
 
Agent; or (iv) the validity, effectiveness or genuineness of any Financing
Document or any other instrument or writing furnished in connection herewith.
The Administrative Agent shall not incur any liability by acting in reliance
upon any notice, consent, certificate, statement, or other writing (which may be
a bank wire, telex, facsimile transmission or similar writing) believed by it to
be genuine or to be signed by the proper party or parties.

     Section 7.06. Indemnification. Each Bank shall, ratably in accordance with
its Commitment, indemnify the Administrative Agent, its affiliates and their
respective directors, officers, agents and employees (to the extent not
reimbursed by the Obligors) against any cost, expense (including counsel fees
and disbursements), claim, demand, action, loss or liability (except such as
result from such indemnitees' gross negligence or willful misconduct) that such
indemnitees may suffer or incur in such capacity in connection with the
Financing Documents or any action taken or omitted by such indemnitees hereunder
or thereunder.

     Section 7.07. Credit Decision. Each Bank acknowledges that it has,
independently and without reliance upon any Agent or any other Bank, and based
on such documents and information as it has deemed appropriate, made its own
credit analysis and decision to enter into this Agreement. Each Bank also
acknowledges that it will, independently and without reliance upon any Agent or
any other Bank, and based on such documents and information as it shall deem
appropriate at the time, continue to make its own credit decisions in taking or
not taking any action under this Agreement.

     Section 7.08. Successor Administrative Agent. The Administrative Agent may
resign at any time by giving notice thereof to the Banks and the Borrower. Upon
any such resignation, the Required Banks shall have the right to appoint a
successor Administrative Agent, which successor Administrative Agent shall be
reasonably acceptable to the Borrower. If no successor Administrative Agent
shall have been so appointed by the Required Banks, and shall have accepted such
appointment, within 30 days after the retiring Administrative Agent gives notice
of resignation, then the retiring Administrative Agent may, on behalf of the
Banks, appoint a successor Administrative Agent, which shall be a commercial
bank organized or licensed under the laws of the United States of America or of
any State thereof and having a combined capital and surplus of at least
$100,000,000. Upon the acceptance of its appointment as Administrative Agent
hereunder by a successor Administrative Agent, such successor Administrative
Agent shall thereupon succeed to and become vested with all the rights and
duties of the retiring Administrative Agent, and the retiring Administrative
Agent shall be discharged from its duties and obligations hereunder. After any
retiring Administrative Agent's resignation hereunder as

                                       46
<PAGE>
 
Administrative Agent, the provisions of this Article shall inure to its
benefit as to any actions taken or omitted to be taken by it while it was
Administrative Agent.

     Section 7.09.  Administrative Agent's Fee.  The Borrower shall pay to the
Administrative Agent for its own account fees in the amounts and at the times
previously agreed upon between the Borrower and the Administrative Agent.

     Section 7.10.  Other Agents.  Nothing contained in this Agreement shall be
construed to impose any obligation or duty whatsoever on either Syndication
Agent, on the Documentation Agent, on the Managing Agent or on any Co-Agent in
its capacity as such an Agent.

                                   ARTICLE 8

                            Change in Circumstances

     Section 8.01. Basis for Determination Interest Rate Inadequate or Unfair.
If on or prior to the first day of any Interest Period for any Fixed Rate
Borrowing:

     (a)  the Administrative Agent is advised by the Reference Banks that
deposits in dollars (in the applicable amounts) are not being offered to the
Reference Banks in the London interbank market for such Interest Period, or

     (b)  in the case of a Euro-Dollar Borrowing, Banks having 50% or more of
the aggregate amount of the Commitments advise the Administrative Agent that the
London Interbank Offered Rate as determined by the Administrative Agent will not
adequately and fairly reflect the cost to such Banks of funding their Euro-
Dollar Loans for such Interest Period, the Administrative Agent shall forthwith
give notice thereof to the Borrower and the Banks, whereupon until the
Administrative Agent notifies the Borrower that the circumstances giving rise to
such suspension no longer exist (i) the obligations of the Banks to make Euro-
Dollar Loans, or to continue or convert outstanding Loans as or into Euro-Dollar
Loans, shall be suspended and (ii) each outstanding Euro-Dollar Loan shall be
converted into a Base Rate Loan on the last day of the then current Interest
Period applicable thereto. Unless the Borrower notifies the Administrative Agent
at least two Domestic Business Days before the date of any Fixed Rate Borrowing
for which a Notice of Borrowing has previously been given that it elects not to
borrow on such date, (i) if such Fixed Rate Borrowing is a Euro-Dollar
Borrowing, such Borrowing shall instead be made as a Base Rate


                                      47
<PAGE>
 
Borrowing and (ii) if such Fixed Rate Borrowing is a Money Market LIBOR
Borrowing, the Money Market LIBOR Loans comprising such Borrowing shall bear
interest for each day from and including the first day to but excluding the last
day of the Interest Period applicable thereto at the Base Rate for such day.

     Section 8.02.  Illegality.  If, on or after the date of this Agreement, the
adoption of any applicable law, rule or regulation, or any change in any
applicable law, rule or regulation, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by any Bank (or its Euro-Dollar Lending Office) with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency shall make it unlawful or impossible for any Bank (or its 
Euro-Dollar Lending Office) to make, maintain or fund its Euro-Dollar Loans and
such Bank shall so notify the Administrative Agent, the Administrative Agent
shall forthwith give notice thereof to the other Banks and the Borrower,
whereupon until such Bank notifies the Borrower and the Administrative Agent
that the circumstances giving rise to such suspension no longer exist, the
obligation of such Bank to make Euro-Dollar Loans, or to continue or convert
outstanding Loans as or into Euro-Dollar Loans, shall be suspended. Before
giving any notice to the Administrative Agent pursuant to this Section, such
Bank shall designate a different Euro-Dollar Lending Office if such designation
will avoid the need for giving such notice and will not, in the judgment of such
Bank, be otherwise disadvantageous to such Bank. If such notice is given, each
Euro-Dollar Loan of such Bank then outstanding shall be converted to a Base Rate
Loan either (a) on the last day of the then current Interest Period applicable
to such Euro-Dollar Loan if such Bank may lawfully continue to maintain and fund
such Loan as a Euro-Dollar Loan to such day or (b) immediately if such Bank
shall determine that it may not lawfully continue to maintain and fund such Loan
as a Euro-Dollar Loan to such day.

     Section 8.03.  Increased Cost and Reduced Return.  (a) If on or after (x)
the date hereof, in the case of any Committed Loan or Letter of Credit or any
obligation to make Committed Loans or issue or participate in any Letter of
Credit or (y) the date of the related Money Market Quote, in the case of any
Money Market Loan, the adoption of any applicable law, rule or regulation, or
any change in any applicable law, rule or regulation, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or compliance by any Bank (or its Applicable Lending Office) with any
request or directive (whether or not having the force of law) of any such
authority, central bank or comparable agency shall impose, modify or deem
applicable any reserve (including, without limitation, any such requirement
imposed by the Board of

                                       48
<PAGE>
 
Governors of the Federal Reserve System, but excluding with respect to any Euro-
Dollar Loan any such requirement with respect to which such Bank is entitled to
compensation during the relevant Interest Period under Section 2.16), special
deposit, insurance assessment or similar requirement against assets of, deposits
with or for the account of, or credit extended by, any Bank (or its Applicable
Lending Office) or shall impose on any Bank (or its Applicable Lending Office)
or on the London interbank market any other condition affecting its Fixed Rate
Loans, its Note or its obligation to make Fixed Rate Loans or its obligations
hereunder in respect of Letters of Credit and the result of any of the foregoing
is to increase the cost to such Bank (or its Applicable Lending Office) of
making or maintaining any Fixed Rate Loan or of issuing or participating in any
Letter of Credit, or to reduce the amount of any sum received or receivable by
such Bank (or its Applicable Lending Office) under this Agreement or under its
Note with respect thereto, by an amount deemed by such Bank to be material,
then, within 15 days after demand by such Bank (with a copy to the
Administrative Agent), the Borrower shall pay to such Bank such additional
amount or amounts as will compensate such Bank for such increased cost or
reduction.

     (b)  If any Bank shall have determined that, after the date hereof, the
adoption of any applicable law, rule or regulation regarding capital adequacy,
or any change in any such law, rule or regulation, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or any request or directive regarding capital adequacy (whether or not
having the force of law) of any such authority, central bank or comparable
agency, has or would have the effect of reducing the rate of return on capital
of such Bank (or its Parent) as a consequence of such Bank's obligations
hereunder to a level below that which such Bank (or its Parent) could have
achieved but for such adoption, change, request or directive (taking into
consideration its policies with respect to capital adequacy) by an amount deemed
by such Bank to be material, then from time to time, within 15 days after demand
by such Bank (with a copy to the Administrative Agent), the Borrower shall pay
to such Bank such additional amount or amounts as will compensate such Bank (or
its Parent) for such reduction.

     (c)  Each Bank will promptly notify the Borrower and the Administrative
Agent of any event of which it has knowledge, occurring after the date hereof,
which will entitle such Bank to compensation pursuant to this Section and will
designate a different Applicable Lending Office if such designation will avoid
the need for, or reduce the amount of, such compensation and will not, in the
judgment of such Bank, be otherwise disadvantageous to such Bank.  A certificate
of any Bank claiming compensation under this Section and setting forth the

                                       49
<PAGE>
 
additional amount or amounts to be paid to it hereunder shall be conclusive in
the absence of manifest error.  In determining such amount, such Bank may use
any reasonable averaging and attribution methods.  Notwithstanding the foregoing
subsections 8.03(a) and 8.03(b) of this Section 8.03, the Borrower shall only be
obligated to compensate any Bank for any amount arising or accruing during (i)
any time or period commencing not more than 180 days prior to the date on which
such Bank notifies the Administrative Agent and the Borrower that it proposes to
demand such compensation and identifies to the Administrative Agent and the
Borrower the statute, regulation or other basis upon which the claimed
compensation is or will be based and (ii) any time or period during which
because of the retroactive application of such statute, regulation or other such
basis, such Bank did not know in good faith that such amount would arise or
accrue.

     Section 8.04.  Taxes.  (a) Any and all payments by any Obligor hereunder
shall be made free and clear of and without deduction for any and all present or
future taxes, levies, imposts, deductions, charges or withholdings, and all
penalties, interest, expenses and similar liabilities with respect thereto,
excluding (i) in the case of each Bank and the Administrative Agent, taxes
imposed on its income, and franchise and similar taxes imposed on it, by the
jurisdiction under the laws of which such Bank or the Administrative Agent, as
the case may be, shall be organized or any political subdivision thereof, (ii)
in the case of each Bank, taxes imposed on its income, and franchise and similar
taxes imposed on it, by the jurisdiction of such Bank's Applicable Lending
Office or any political subdivision thereof or in which such Bank's principal
executive office is located or any political subdivision thereof and (iii) any
Taxes imposed as a result of a change of such Bank's Applicable Lending Office
to the extent such Taxes would not have been imposed absent such change;
provided however, that (x) a change in such Bank's Applicable Lending Office to
which the Obligor has consented and (y) a change in such Bank's Applicable
Lending Office as a result of legal or regulatory restrictions shall not
constitute a change for the purposes of this Section 8.04 (all such non-excluded
taxes, levies, imposts, deductions, charges, withholdings and liabilities being
hereinafter referred to as "Taxes"). Each Obligor agrees that, if any Obligor
shall be required by law to deduct any Taxes from or in respect of any sum
payable hereunder to any Bank or the Administrative Agent, (A) the sum payable
to such Bank or the Administrative Agent shall be increased as may be necessary
so that after making all required deductions for Taxes (including deductions
applicable to additional sums payable under this Section 8.04), such Bank or the
Administrative Agent, as the case may be, shall receive an amount equal to the
sum it would have received had no such deductions been made, (B) such Obligor
shall make such deductions and (C) such Obligor shall pay the full amount
deducted to the relevant taxing authority or other authority in accordance with
applicable law.

                                       50
<PAGE>
 
     (b)  In addition, each Obligor agrees to pay any present or future stamp
or documentary taxes or any other excise or property taxes, charges or similar
levies which shall arise from any payment made under, or from the execution,
delivery or registration of, or otherwise with respect to, this Agreement or any
Note or Letter of Credit (all such taxes, charges or levies being hereinafter
referred to as "Other Taxes").

     (c)  Each Obligor agrees to indemnify each Bank and the Administrative
Agent for the full amount of Taxes or Other Taxes (including any Taxes or Other
Taxes imposed on amounts payable under this Section 8.04) paid by such Bank or
the Administrative Agent or any penalties, interest, expenses and similar
liabilities arising therefrom or with respect thereto, whether or not such Taxes
or Other Taxes were correctly or legally asserted provided that such Bank has
acted in good faith with respect to such Taxes or Other Taxes and that such Bank
reasonably cooperates with the Obligors in challenging such Taxes or Other
Taxes.  Each indemnification under this paragraph (c) shall be made within 30
days from the date such Bank or the Administrative Agent makes demand therefor.

     (d)  Each Bank shall use reasonable efforts (consistent with legal and
regulatory restrictions) (x) to file any certificate or document or to furnish
any information as reasonably requested by any Obligor pursuant to any
applicable treaty, law, rule or regulation or (y) to designate a different
Lending Office if the making of such a filing, the furnishing of such
information or the designation of such other Lending Office would avoid the need
for or reduce the amount of any additional amounts payable by any Obligor
pursuant to this Section 8.04 and would not, in the reasonable judgment of such
Bank, be disadvantageous to such Bank.  Notwithstanding the foregoing, it is
understood and agreed that nothing in this Section 8.04 shall interfere with the
rights of any Bank to conduct its fiscal or tax affairs in such manner as it
deems fit.

     (e)  Within 90 days after the date of any payment of Taxes, the Obligors
will furnish to the Administrative Agent notarized copies for each Bank of the
original receipt evidencing payment thereof.  If no Taxes shall be payable in
respect of any payment under this Agreement, the Obligors will, upon the
reasonable request of the Administrative Agent, furnish to the Administrative
Agent a certificate in form reasonably acceptable to the Administrative Agent's
counsel confirming that such payment is exempt from or not subject to Taxes.

     (f)  For any period with respect to which a Bank has failed to provide
the Obligors with the appropriate form pursuant to Section 8.04(d) (unless such
failure is due to a change in treaty, law or regulation occurring subsequent to
the date on which such form originally was required to be provided), such Bank
shall 

                                       51
<PAGE>
 
not be entitled to indemnification under Section 8.04(a) or (b) with
respect to Taxes imposed by the United States; provided that if a Bank, which is
otherwise exempt from or subject to a reduced rate of withholding tax, becomes
subject to Taxes because of its failure to deliver a form required hereunder,
the Obligors shall take such steps as such Bank shall reasonably request to
assist such Bank to recover such Taxes.

     Section 8.05. Base Rate Loans Substituted for Affected Fixed Rate Loans. If
(i) the obligation of any Bank to make or to continue or convert outstanding
Loans as or to Euro-Dollar Loans has been suspended pursuant to Section 8.02 or
(ii) any Bank has demanded compensation under Section 8.03 or 8.04 with respect
to its Euro-Dollar Loans and the Borrower shall, by at least five Euro-Dollar
Business Days' prior notice to such Bank through the Administrative Agent, have
elected that the provisions of this Section shall apply to such Bank, then,
unless and until such Bank notifies the Borrower that the circumstances giving
rise to such suspension or demand for compensation no longer exist:

     (a)  all Loans which would otherwise be made by such Bank as (or continued
as or converted to) Euro-Dollar Loans shall instead be Base Rate Loans (on which
interest and principal shall be payable contemporaneously with the related Euro-
Dollar Loans of the other Banks), and

     (b)  after each of its Euro-Dollar Loans has been repaid (or converted),
all payments of principal which would otherwise be applied to repay such Euro-
Dollar Loans shall be applied to repay its Base Rate Loans instead.

If such Bank notifies the Borrower that the circumstances giving rise to such
suspension or demand for compensation no longer exist, the principal amount of
each such Base Rate Loan shall be converted into a Euro-Dollar Loan on the first
day of the next succeeding Interest Period applicable to the related Euro-Dollar
Loans of the other Banks.

     Section 8.06.  Substitution of Bank. If (i) the obligation of any Bank to
make or to convert or continue outstanding Loans as or into Euro-Dollar Loans
has been suspended pursuant to Section 8.02 or (ii) any Bank has demanded
compensation under Section 8.03 or 8.04, the Borrower shall have the right, with
the assistance of the Administrative Agent, to designate a substitute bank or
banks (which may be one or more of the Banks) mutually satisfactory to the
Borrower, the Administrative Agent (whose consent shall not be unreasonably
withheld) and the issuing banks under the Related Documents to purchase for
cash, pursuant to an Assignment and Assumption Agreement in substantially the
form of Exhibit I hereto, the outstanding loans of such Bank and assume the
commitment and letter of credit liabilities of such Bank (and its affiliates)
under each of the Related

                                      52
<PAGE>
 
Documents, without recourse to or warranty by, or expense to, such Bank, for a
purchase price equal to the principal amount of all of such Bank's outstanding
loans and funded letter of credit liabilities plus any accrued but unpaid
interest thereon and the accrued but unpaid fees in respect of such Bank's
commitments and letter of credit liabilities plus such amount, if any, as would
be payable pursuant to the funding loss indemnities in the Related Documents if
the outstanding loans of such Bank were prepaid in their entirety on the date of
consummation of such assignment.
                     
                                   ARTICLE 9
                                      
                                    Guaranty

     Section 9.01. The Guaranty. Each Guarantor hereby unconditionally, jointly
and severally, absolutely and irrevocably guarantees the full and punctual
payment (whether at stated maturity, upon acceleration or otherwise) of all
amounts payable by the Borrower under the Financing Documents including, without
limitation, the principal of and interest on each Note issued by the Borrower
pursuant to this Agreement. Upon failure by the Borrower to pay punctually any
such amount, each Guarantor shall forthwith on demand pay the amount not so paid
at the place and in the manner specified in this Agreement.

     Section 9.02. Guaranty Unconditional. The obligations of each Guarantor
hereunder shall be unconditional, absolute and irrevocable and, without limiting
the generality of the foregoing, shall not be released, discharged or otherwise
affected by:

     (a)  any extension, renewal, settlement, compromise, waiver or release in
respect of any obligation of any other Obligor under any of the Financing
Documents, by operation of law or otherwise;

     (b)  any modification or amendment of or supplement to any of the Financing
Documents;

     (c)  any release, non-perfection or invalidity of any direct or indirect
security for any obligation of any other Obligor under any of the Financing
Documents;

     (d)  any change in the corporate existence, structure or ownership of any
Obligor, or any insolvency, bankruptcy, reorganization or other similar
proceeding affecting any other Obligor or its assets or any resulting release or

                                       53
<PAGE>
 
discharge of any obligation of any other Obligor contained in any of the
Financing Documents;

     (e)  the existence of any claim, set-off or other rights which any
Obligor may have at any time against any other Obligor, the Administrative
Agent, any Bank or any other corporation or person, whether in connection with
any of the Financing Documents or any unrelated transactions, provided that
nothing herein shall prevent the assertion of any such claim by separate suit or
compulsory counterclaim;

     (f)  any invalidity or unenforceability relating to or against any other
Obligor for any reason of any of the Financing Documents, or any provision of
applicable law or regulation purporting to prohibit the payment by any other
Obligor of the principal of or interest on any Note or any other amount payable
under any of the Financing Documents; or

     (g)  any other act or omission to act or delay of any kind by any
Obligor, the Administrative Agent, any Bank or any other corporation or person
or any other circumstance whatsoever which might, but for the provisions of this
paragraph, constitute a legal or equitable discharge of or defense to any
Guarantor's obligations hereunder.

     Section 9.03. Discharge Only upon Payment in Full; Reinstatement in Certain
Circumstances. Each Guarantor's obligations hereunder shall remain in full
force and effect until the Commitments shall have terminated and the principal
of and interest on the Notes and all other amounts payable by the Borrower under
the Financing Documents shall have been paid in full. If at any time any payment
of the principal of or interest on any Note or any other amount payable by the
Borrower under the Financing Documents is rescinded or must be otherwise
restored or returned upon the insolvency, bankruptcy or reorganization of the
Borrower or otherwise, each Guarantor's obligations hereunder with respect to
such payment shall be reinstated as though such payment had been due but not
made at such time.

     Section 9.04. Waiver by Each of the Guarantors. Each Guarantor irrevocably
waives acceptance hereof, presentment, demand, protest and any notice not
provided for herein, as well as any requirement that at any time any action be
taken by any corporation or person against any other Obligor or any other
corporation or person.

     Section 9.05. Subrogation. Upon the making by any Guarantor of any payment
hereunder, such Guarantor shall be subrogated to the rights of the payee against
the Borrower with respect to such payment; provided that such Guarantor

                                       54
<PAGE>
 
shall not enforce any right to receive any payment by way of subrogation until
all amounts of principal of and interest on the Loans, all Letter of Credit
Liabilities and all other amounts payable by the Borrower under this Agreement
shall have been paid in full and the Commitments shall have terminated.

     Section 9.06. Stay of Acceleration. If acceleration of the time for payment
of any amount payable by the Borrower under any of the Financing Documents is
stayed upon the insolvency, bankruptcy or reorganization of the Borrower, all
such amounts otherwise subject to acceleration under the terms of this Agreement
shall nonetheless be payable by each Guarantor hereunder forthwith on demand by
the Administrative Agent made at the request of the requisite proportion of the
Banks specified in Article 6.

     Section 9.07. Limit of Liability. The obligations of each Guarantor
hereunder shall be limited to an aggregate amount equal to the largest amount
that would not render its obligations hereunder subject to avoidance under any
applicable bankruptcy, insolvency or similar law.

                                   ARTICLE 10

                                 Miscellaneous

     Section 10.01. Notices. All notices, requests and other communications to
any party hereunder shall be in writing (including bank wire, telex, facsimile
transmission or similar writing) and shall be given to such party: (x) in the
case of any Obligor or the Administrative Agent, at its address, facsimile
number or telex number set forth on the signature pages hereof, (y) in the case
of any Bank, at its address, facsimile number or telex number set forth in its
Administrative Questionnaire or (z) in the case of any party, such other
address, facsimile number or telex number as such party may hereafter specify
for the purpose by notice to the Administrative Agent and the Borrower. Each
such notice, request or other communication shall be effective (i) if given by
telex, when such telex is transmitted to the telex number specified in this
Section and the appropriate answerback is received, (ii) if given by facsimile
transmission, when transmitted to the facsimile number specified in this Section
and confirmation of receipt is received, (iii) if given by mail, 10 days after
such communication is deposited in the mails with first class postage prepaid,
addressed as aforesaid or (iv) if given by any other means, when delivered at
the address specified in this Section; provided that notices to the
Administrative Agent or the Issuing Bank under Article 2 or Article 8 shall not
be effective until received.

     Section 10.02. No Waivers. No failure or delay by the Administrative Agent
or any Bank in exercising any right, power or privilege under any

                                       55
<PAGE>
 
Financing Document shall operate as a waiver thereof nor shall any single or
partial exercise thereof preclude any other or further exercise thereof or the
exercise of any other right, power or privilege. The rights and remedies
provided in the Financing Documents shall be cumulative and not exclusive of any
rights or remedies provided by law.

     Section 10.03. Expenses; Indemnification. (a) The Borrower shall pay (i)
all out-of-pocket expenses of the Administrative Agent, including fees and
disbursements of Davis Polk & Wardwell, special counsel for the Agents,
reasonably incurred in connection with the preparation of the Financing
Documents, any waiver or consent hereunder or thereunder or any amendment hereof
or thereof or any Default or alleged Default hereunder or thereunder and (ii) if
an Event of Default occurs, all out-of-pocket expenses incurred by the
Administrative Agent and each Bank, including (without duplication) the fees and
disbursements of outside counsel and the allocated cost of inside counsel, in
connection with such Event of Default and collection, bankruptcy, insolvency and
other enforcement proceedings resulting therefrom.

     (b)  The Borrower agrees to indemnify the Administrative Agent and each
Bank, their respective affiliates and the respective directors, officers, agents
and employees of the foregoing (each an "Indemnitee") and hold each Indemnitee
harmless from and against any and all liabilities, losses, damages, costs and
expenses of any kind, including, without limitation, the reasonable fees and
disbursements of counsel, which may be reasonably incurred by such Indemnitee in
connection with any investigative, administrative or judicial proceeding
(whether or not such Indemnitee shall be designated a party thereto) brought or
threatened relating to or arising out of the Financing Documents or any actual
or proposed use of proceeds of Loans; provided that no Indemnitee shall have the
right to be indemnified hereunder for such Indemnitee's own gross negligence or
willful misconduct as determined by a court of competent jurisdiction.

     Section 10.04. Sharing; Set-Offs. (a) Each Bank agrees that if it shall, by
exercising any right of set-off or counterclaim or otherwise, receive payment of
a proportion of the aggregate amount of principal and interest due with respect
to its Loans and Letter of Credit Liabilities which is greater than the
proportion received by any other Bank in respect of the aggregate amount of
principal and interest due with respect to the Loans and Letter of Credit
Liabilities of such other Bank, the Bank receiving such proportionately greater
payment shall purchase such participations in the Loans and Letter of Credit
Liabilities of the other Banks, and such other adjustments shall be made, as may
be required so that all such payments of principal with respect to the Loans and
Letter of Credit Liabilities shall be shared by the Banks pro rata; provided
that nothing in this

                                       56
<PAGE>
 
Section shall impair the right of any Bank to exercise any right of set-off or
counterclaim it may have and to apply the amount subject to such exercise to the
payment of indebtedness of any Obligor other than its indebtedness hereunder.
Each Obligor agrees, to the fullest extent it may effectively do so under
applicable law, that any holder of a participation in a Loan or Letter of Credit
Liability, whether or not acquired pursuant to the foregoing arrangements, may
exercise rights of set-off or counterclaim and other rights with respect to such
participation as fully as if such holder of a participation were a direct
creditor of such Obligor in the amount of such participation.

     (b)  Upon (i) the occurrence and during the continuance of any Event of
Default and (ii) the making of the request specified by Section 6.01 to
Administrative Agent to declare the Notes due and payable pursuant to the
provisions of Section 6.01, each Bank and each of its affiliates is hereby
authorized at any time and from time to time, to the fullest extent permitted by
law, to set off and otherwise apply any and all deposits (general or special,
time or demand, provisional or final) at any time held and other indebtedness at
any time owing by such Bank or such affiliate to or for the credit or the
account of any Obligor against any and all of the obligations of such Obligor to
such Bank now or hereafter existing under the Financing Documents, irrespective
of whether such Bank shall have made any demand for payment thereof and although
such obligations may be unmatured.  Each Bank agrees promptly to notify such
Obligor after any such setoff and application; provided, however, that the
failure to give such notice shall not affect the validity of such setoff and
application.  The rights of each Bank and its affiliates under this Section are
in addition to other rights and remedies (including, without limitation, other
rights of setoff) that such Bank and its affiliates may have.


     Section 10.05.  Amendments and Waivers.  Any provision of this Agreement or
the Notes may be amended or waived if, but only if, such amendment or waiver is
in writing and is signed by the Obligors and the Required Banks (and, if the
rights or duties of the Administrative Agent or any Issuing Bank are affected
thereby, by it); provided that no such amendment or waiver shall, unless signed
by all the Banks, (i) increase or decrease the Commitment of any Bank (except
for a ratable decrease in the Commitments of all Banks) or subject any Bank to
any additional obligation, (ii) reduce the principal of or rate of interest on
any Loan or Letter of Credit Liabilities or any fees hereunder, (iii) postpone
the date fixed for any payment of principal of or interest on any Loan or the
amount to be reimbursed in respect of any Letter of Credit or interest thereon
or any fees hereunder or for any reduction or termination of any Commitments,
(iv) release any Guarantor hereunder, (v) change the percentage of the
Commitments or of the aggregate unpaid principal amount of the Loans and/or
Letter of Credit Liabilities, or the number of Banks, which shall be required
for

                                       57
<PAGE>
 
the Banks or any of them to take any action under this Section or any other
provision of this Agreement or (vi) amend this Section 10.05.

     Section 10.06.  Successors and Assigns.

     (a)  The provisions of this Agreement shall be binding upon and inure to
the benefit of the parties hereto and their respective successors and assigns,
except that the Obligors may not assign or otherwise transfer any of their
rights under this Agreement without the prior written consent of all Banks.

     (b)  Any Bank may at any time grant to one or more banks or other
institutions (each a "Participant") participating interests in its Commitment or
any or all of its Loans.  In the event of any such grant by a Bank of a
participating interest to a Participant, whether or not upon notice to the
Borrower and the Administrative Agent, such Bank shall remain responsible for
the performance of its obligations hereunder, and the Borrower, the Issuing
Banks and the Administrative Agent shall continue to deal solely and directly
with such Bank in connection with such Bank's rights and obligations under this
Agreement.  Any agreement pursuant to which any Bank may grant such a
participating interest shall provide that such Bank shall retain the sole right
and responsibility to enforce the obligations of the Borrower hereunder
including, without limitation, the right to approve any amendment, modification
or waiver of any provision of this Agreement; provided that such participation
agreement may provide that such Bank will not agree to any modification,
amendment or waiver of this Agreement described in clause (i), (ii), (iii), (iv)
or (v) of Section 10.05 without the consent of the Participant.  The Borrower
agrees that each Participant shall, to the extent provided in its participation
agreement and subject to subsection (e) below, be entitled to the benefits of
Article 8 with respect to its participating interest.  An assignment or other
transfer which is not permitted by subsection (c) or (d) below shall be given
effect for purposes of this Agreement only to the extent of a participating
interest granted in accordance with this subsection (b).

     (c)  Any Bank may at any time assign to one or more banks or other
institutions (each an "Assignee") all, or a proportionate part (equivalent to an
initial participation in the Related Documents of not less than $15,000,000,
unless the Borrower shall otherwise consent or the assignment is for all of the
rights and obligations of the transferor Bank) of all, of its rights and
obligations under this Agreement and the Notes, and such Assignee shall assume
such rights and obligations, pursuant to an Assignment and Assumption Agreement
in substantially the form of Exhibit I hereto executed by such Assignee and such
transferor Bank, with (and subject to) the subscribed consent of the Borrower
and the Administration Agent, which shall not be unreasonably withheld, and the
Issuing Banks; provided that if an Assignee is an affiliate of such transferor
Bank 

                                       58
<PAGE>
 
or was a Bank immediately prior to such assignment, no such consent of the
Borrower or the Administrative Agent shall be required; and provided further
that such assignment may, but need not, include rights of the transferor Bank in
respect of outstanding Money Market Loans; and provided further that, unless the
Borrower shall otherwise consent or the assignment is for all of the rights and
obligations of the transferor Bank, the participation in the Related Documents
of such transferor Bank after giving effect to such assignment (together with
the participations of its affiliates) shall not be less than $15,000,000; and
provided further that such assignment shall be accompanied by a ratably
equivalent assignment of the rights and obligations of the transferor Bank (and
its affiliates) under each of the other Related Documents.  Upon execution and
delivery of such instrument and payment by such Assignee to such transferor Bank
of an amount equal to the purchase price agreed between such transferor Bank and
such Assignee, such Assignee shall be a Bank party to this Agreement and shall
have all the rights and obligations of a Bank with a Commitment as set forth in
such instrument of assumption, and the transferor Bank shall be released from
its obligations hereunder to a corresponding extent, and no further consent or
action by any party shall be required.  Upon the consummation of any assignment
pursuant to this subsection (c), the transferor Bank, the Administrative Agent
and the Borrower shall make appropriate arrangements so that, if required, a new
Note is issued to the Assignee.  In connection with any such assignment, the
transferor Bank shall pay to the Administrative Agent an administrative fee for
processing such assignment in the amount of $2,500.

     (d)  Any Bank may at any time assign all or any portion of its rights under
this Agreement and its Note to a Federal Reserve Bank. No such assignment shall
release the transferor Bank from its obligations hereunder.

     (e)  No Assignee, Participant or other transferee of any Bank's rights
shall be entitled to receive any greater payment under Section 8.03 or 8.04 than
such Bank would have been entitled to receive with respect to the rights
transferred, unless such transfer is made with the Borrower's prior written
consent or by reason of the provisions of Section 8.02, 8.03 or 8.04 requiring
such Bank to designate a different Applicable Lending Office under certain
circumstances or at a time when the circumstances giving rise to such greater
payment did not exist.

     Section 10.07.  Collateral.  Each of the Banks represents to the
Administrative Agent and each of the other Banks that it in good faith is not
relying upon any "margin stock" (as defined in Regulation U) as collateral in
the extension or maintenance of the credit provided for in this Agreement.

     Section 10.08.  Governing Law.  This Agreement and each Note shall be
governed by and construed in accordance with the laws of the State of New York.

                                       59
<PAGE>
 
     Section 10.09.  Counterparts; Integration; Effectiveness.  This Agreement
may be signed in any number of counterparts, each of which shall be an original,
with the same effect as if the signatures thereto and hereto were upon the same
instrument. This Agreement constitutes the entire agreement and understanding
among the parties hereto and supersedes any and all prior agreements and
understandings, oral or written, relating to the subject matter hereof. This
Agreement shall become effective upon receipt by the Administrative Agent of
counterparts hereof signed by each of the parties hereto (or, in the case of any
party as to which an executed counterpart shall not have been received, receipt
by the Administrative Agent in form satisfactory to it of telegraphic, telex,
facsimile or other written confirmation from such party of execution of a
counterpart hereof by such party).

     Section 10.10.  Judicial Proceedings.  (a) Consent to Jurisdiction. Each
Obligor irrevocably submits to the jurisdiction of any federal court sitting in
New York City and, in the event that jurisdiction cannot be obtained or
maintained in a federal court, to the jurisdiction of any New York State court
sitting in New York City over any suit, action or proceeding arising out of or
relating to any of the Financing Documents. Each Obligor irrevocably waives, to
the fullest extent permitted by law, any objection which it may now or hereafter
have to the laying of the venue of any such suit, action or proceeding brought
in such court and any claim that any suit, action or proceeding brought in such
a court has been brought in an inconvenient forum. Each Obligor agrees that a
final judgment in any such suit, action or proceeding brought in such a court
shall be conclusive and binding upon it and will be given effect in Bermuda or
the Cayman Islands, as the case may be, to the fullest extent permitted by
applicable law and may be enforced in any federal or New York State court
sitting in New York City (or any other courts to the jurisdiction of which such
Obligor is or may be subject) by a suit upon such judgment, provided that
service of process is effected upon it in one of the manners specified herein or
as otherwise permitted by law.

     (b)  Appointment of Agent for Service of Process.  Each Obligor hereby
irrevocably designates and appoints CT Corporation System having an office on
the date hereof at 1633 Broadway, New York, New York 10019 as its authorized
agent, to accept and acknowledge on its behalf, service of any and all process
which may be served in any suit, action or proceeding of the nature referred to
in subsection (a) above in any federal or New York State court sitting in New
York City.  Each Obligor represents and warrants that such agent has agreed in
writing to accept such appointment and that a true copy of such designation and
acceptance has been delivered to the Administrative Agent.  Said designation and
appointment shall be irrevocable until the Commitments shall have terminated and
all Letter of Credit Liabilities and all principal and interest and all other
amounts payable hereunder and under the Notes shall have been paid in full in

                                       60
<PAGE>
 
accordance with the provisions hereof and thereof.  If such agent shall cease so
to act, each Obligor covenants and agrees to designate irrevocably and appoint
without delay another such agent satisfactory to the Administrative Agent and to
deliver promptly to the Administrative Agent evidence in writing of such other
agent's acceptance of such appointment.

     (c)  Service of Process.  Each Obligor hereby consents to process being
served in any suit, action or proceeding of the nature referred to in subsection
(a) above in any federal or New York State court sitting in New York City by
service of process upon the agent of such Obligor for service of process in such
jurisdiction appointed as provided in subsection (b) above; provided that, to
the extent lawful and possible, notice of said service upon such agent shall be
mailed by registered or certified air mail, postage prepaid, return receipt
requested, to such Obligor at its address specified on the signature page hereof
or to any other address of which such Obligor shall have given written notice to
the Bank.  Each Obligor irrevocably waives, to the fullest extent permitted by
law, all claim of error by reason of any such service in such manner and agrees
that such service shall be deemed in every respect effective service of process
upon such Obligor in any such suit, action or proceeding and shall, to the
fullest extent permitted by law, be taken and held to be valid and personal
service upon and personal delivery to such Obligor.

     (d)  No Limitation on Service or Suit.  Nothing in this Section 10.10 shall
affect the right of the Administrative Agent or any Bank to serve process in any
other manner permitted by law or limit the right of the Administrative Agent or
any Bank to bring proceedings against any Obligor in the courts of any
jurisdiction or jurisdictions.

     Section 10.11.  Judgment Currency.  If, under any applicable law and
whether pursuant to a judgment being made or registered against any Obligor or
for any other reason, any payment under or in connection with any of the
Financing Documents is made or satisfied in a currency (the "Other Currency")
other than that in which the relevant payment is due (the "Required Currency")
then, to the extent that the payment (when converted into the Required Currency
at the rate of exchange on the date of payment or, if it is not practicable for
the party entitled thereto (the "Payee") to purchase the Required Currency with
the Other Currency on the date of payment, at the rate of exchange as soon
thereafter as it is practicable for it to do so) actually received by the Payee
falls short of the amount due under the terms of this Agreement and the Notes,
each Obligor shall, to the extent permitted by law, as a separate and
independent obligation, indemnify and hold harmless the Payee against the amount
of such short-fall. For the purpose of this Section, "rate of exchange" means
the rate at which the Payee

                                       61
<PAGE>
 
is able on the relevant date to purchase the Required Currency with the Other
Currency and shall take into account any premium and other costs of exchange.

     Section 10.12.  WAIVER OF JURY TRIAL.  EACH OF THE OBLIGORS, THE
ADMINISTRATIVE AGENT AND THE BANKS HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT
TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS
AGREEMENT, THE NOTES OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

     Section 10.13.  Existing Credit Agreement.  On the Closing Date and
simultaneously with the closing the Borrower hereby gives notice to Morgan
Guaranty Trust Company of New York, as agent, under Section 2.09 of the Credit
Agreement referred to in clause (x) of Section 3.01 of the termination of the
Commitments (as defined therein) and the Banks hereby waive the requirement that
prior notice of such termination be given as therein provided.

     Section 10.14.  Confidentiality.  The Administrative Agent and each Bank
agrees to keep any information delivered or made available by any Obligor
pursuant to this Agreement confidential from anyone other than persons employed
or retained by such Bank and its affiliates who are engaged in evaluating,
approving, structuring or administering the credit facility contemplated hereby;
provided that nothing herein shall prevent any Bank from disclosing such
information (a) to any other Bank or to the Administrative Agent, (b) subject to
provisions substantially similar to those contained in this Section 10.14, to
any other Person if reasonably incidental to the administration of the credit
facility contemplated hereby, (c) upon the order of any court or administrative
agency, (d) upon the request or demand of any regulatory agency or authority,
(e) which had been publicly disclosed other than as a result of a disclosure by
the Administrative Agent or any Bank prohibited by this Agreement, (f) in
connection with any litigation relating to the Related Documents to which the
Administrative Agent, any Bank or its subsidiaries or Parent may be a party, (g)
to the extent necessary in connection with the exercise of any remedy hereunder,
(h) to such Bank's or Administrative Agent's legal counsel and independent
auditors and (i) subject to provisions substantially similar to those contained
in this Section 10.14, to any actual or proposed Participant or Assignee.
Notwithstanding the foregoing, this Section 10.14 shall not apply to information
that is or becomes publicly available, information that was available to a Bank
on a non-confidential basis prior to its disclosure hereunder and information
which becomes available to a Bank on a non-confidential basis from a source that
is not, to such Bank's knowledge, subject to a confidentiality agreement with
any Obligor.

                                       62
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.



                                       ACE LIMITED



                                       By_______________________________________
                                          Title:
                                       The ACE Building
                                       30 Woodbourne Avenue
                                       Hamilton HM 08, Bermuda
                                       Telex number: 3543ACEILBA
                                       Facsimile number: (441) 295-5221


The Common Seal of ACE
Limited was hereunto affixed
in the presence of:

Director

_____________________________

Director/Secretary

_____________________________

                                       63
<PAGE>
 
                                         A.C.E. INSURANCE COMPANY, LTD.,
                                             as Guarantor



                                         By_____________________________
                                             Title:
                                         The ACE Building
                                         30 Woodbourne Avenue
                                         Hamilton HM 08, Bermuda
                                         Telex number: 3543ACEILBA
                                         Facsimile number: (441) 295-5221 


The Common Seal of A.C.E.
Insurance Company, Ltd. was
hereunto affixed in the presence
of:

Director

- -----------------------------------------------

Director/Secretary

- -----------------------------------------------

                                       64
<PAGE>
 
                                         CORPORATE OFFICERS &
                                           DIRECTORS ASSURANCE LTD.,
                                           as Guarantor



                                         By_________________________
                                           Title:
                                         The ACE Building
                                         30 Woodbourne Avenue
                                         Hamilton HM 08, Bermuda
                                         Telex number: 3543ACEILBA
                                         Facsimile number: (441) 295-5221
 

The Common Seal of Corporate
Officers & Directors Assurance
Ltd. was hereunto affixed
in the presence of:

Director

- ------------------------------

Director/Secretary

- ------------------------------

                                       65
<PAGE>
 
                                       TEMPEST REINSURANCE COMPANY
                                         LIMITED, as Guarantor



                                       By_______________________________
                                         Title:
                                       The ACE Building
                                       30 Woodbourne Avenue
                                       Hamilton HM 08, Bermuda
                                       Telex number: 3543ACEILBA
                                       Facsimile number: (441) 295-5221


The Common Seal of Tempest
Reinsurance Company Limited
was hereunto affixed in the
presence of:

Director

- ---------------------------

Director/Secretary

- ---------------------------



Commitments
- -----------

$18,000,000                            MORGAN GUARANTY TRUST
                                         COMPANY OF NEW YORK



                                       By_______________________________
                                         Title:



$18,000,000                            MELLON BANK, N.A.



                                       By_______________________________
                                         Title:

                                      66
<PAGE>
 
                                       Managing Agent


$17,000,000                            CITIBANK, N.A.



                                       By_______________________________
                                         Title:



                                       Co-Agents


$14,000,000                            THE BANK OF NEW YORK



                                       By_______________________________
                                         Title:



$14,000,000                            THE BANK OF TOKYO-MITSUBISHI,
                                         LTD.



                                       By_______________________________
                                         Title:



$14,000,000                            BARCLAYS BANK PLC



                                       By_______________________________
                                         Title:

                                      67
<PAGE>
 
$14,000,000                            DEUTSCHE BANK AG, NEW YORK
                                         AND/OR CAYMAN ISLANDS
                                         BRANCH



                                       By_______________________________
                                         Title:



                                       By:______________________________
                                          Title:



$14,000,000                            FLEET NATIONAL BANK



                                       By_______________________________
                                         Title:



$14,000,000                            ING BANK, N.V.



                                       By_______________________________
                                         Title:



                                       By_______________________________
                                         Title:



$14,000,000                            ROYAL BANK OF CANADA



                                       By_______________________________
                                         Title:

                                      68
<PAGE>
 
                                       Other Banks


$7,000,000                             THE BANK OF BERMUDA, LTD.



                                       By_______________________________
                                         Title:



$7,000,000                             BANQUE NATIONALE DE PARIS



                                       By________________________________
                                         Title:



                                       By_______________________________
                                         Title:



$7,000,000                             THE CHASE MANHATTAN BANK



                                       By________________________________
                                         Title:



$7,000,000                             CREDIT LYONNAIS NEW YORK
                                         BRANCH



                                       By_________________________________
                                         Title:

                                      69
<PAGE>
 
$7,000,000                             DRESDNER BANK A.G., NEW YORK
                                         BRANCH AND GRAND CAYMAN
                                         BRANCH



                                       By_______________________________
                                         Title:



                                       By_______________________________
                                         Title:



$7,000,000                             THE FIRST NATIONAL BANK OF
                                         CHICAGO



                                       By_______________________________
                                         Title:



$7,000,000                             STATE STREET BANK AND TRUST
                                         COMPANY



                                       By_______________________________
                                         Title:


- -----------------

Total Commitments

$200,000,000
=================

                                      70
<PAGE>
 
                                       MORGAN GUARANTY TRUST
                                         COMPANY OF NEW YORK,
                                         as Administrative Agent



                                       By_______________________________
                                         Title
                                       60 Wall Street
                                       New York, New York 10260-0060
                                       Attention: Glenda Irving
                                       Telex number: 177615
                                       Facsimile number: 212-648-5249

                                      71
<PAGE>
 
                               PRICING SCHEDULE


     Each of "Euro-Dollar Margin" and "Facility Fee Rate" means, for any date,
the rates set forth below in the row opposite such term and in the column
corresponding to the "Pricing Level" that applies at such date:


<TABLE>
<CAPTION>
 
 
 
- --------------------------------------------------------------------------------------------------------------------------
                                                Level  I        Level II        Level III       Level IV      Level V
- --------------------------------------------------------------------------------------------------------------------------
<S>                                             <C>             <C>             <C>             <C>             <C>
Euro-Dollar Margin
  Utilization (less than or equal) 50%          0.1750%         0.220%          0.275%          0.300%          0.325%
  Utilization (greater than) 50%                0.2250%         0.270%          0.325%          0.350%          0.450%
- --------------------------------------------------------------------------------------------------------------------------
Facility Fee                                    0.075%          0.080%          0.100%          0.150%          0.200%
Rate
- --------------------------------------------------------------------------------------------------------------------------
</TABLE>


     For purposes of this Schedule, the following terms have the following
meanings:

     "Level I" applies at any date if, at such date, ACE Insurance's claims
paying ability is rated AA- or higher by S&P and (if rated by Moody's) Aa3 or
higher by Moody's.

     "Level II" applies at any date if, at such date, (i) ACE Insurance's claims
paying ability is rated A+ or higher by S&P and (if rated by Moody's) A1 or
higher by Moody's and (ii) Level I does not apply.

     "Level III" applies at any date if, at such date, (i) ACE Insurance's
claims paying ability is rated A or higher by S&P and (if rated by Moody's) A2
or higher by Moody's and (ii) neither Level I nor Level II applies.

     "Level IV" applies at any date if, at such date, (i) ACE Insurance's claims
paying ability is rated A- or higher by S&P and (if rated by Moody's) A3 or
higher by Moody's and (ii) none of Level I, Level II or Level III applies.

     "Level V" applies at any date if, at such date, no other Pricing Level
applies.

     "Moody's" means Moody's Investors Service, Inc., and any successor thereto.

     "Pricing Level" refers to the determination of which of Level I, Level II,
Level III, Level IV or Level V applies at any date.

     "S&P" means Standard & Poor's Rating Services, a division of The McGraw-
Hill Companies, Inc., and any successor thereto.


<PAGE>
 
     "Utilization" means at any date the percentage equivalent of a fraction (i)
the numerator of which is the sum of the aggregate outstanding principal amount
of the Loans at such date and the aggregate amount of Letter of Credit
Liabilities at such date, after giving effect to any borrowing, payment or
issuance on such date, and (ii) the denominator of which is the aggregate amount
of the Commitments at such date, after giving effect to any reduction of the
Commitments on such date. For purposes of this Schedule, if for any reason any
Loans or Letter of Credit Liabilities remain outstanding after termination of
the Commitments, the Utilization for each date on or after the date of such
termination shall be deemed to be greater than 50%.

     The credit ratings to be utilized for purposes of this Schedule are those
ratings assigned to the claims paying ability of ACE Insurance and any rating
assigned to any debt security of the Borrower or the claims paying ability of
the Borrower shall be disregarded.  The rating in effect at any date is that in
effect at the close of business on such date.
<PAGE>
 
                                                                       EXHIBIT A



                                     NOTE



                                                              New York, New York

                                                               December 11, 1997



     For value received, ACE Limited, a Cayman Islands company limited by shares
(the "Borrower"), promises to pay to the order of              (the "Bank"), for
the account of its Applicable Lending Office, the unpaid principal amount of
each Loan made by the Bank to the Borrower pursuant to the Credit Agreement
referred to below on the maturity date therefor specified in the Credit
Agreement. The Borrower promises to pay interest on the unpaid principal amount
of each such Loan on the dates and at the rate or rates provided for in the
Credit Agreement. All such payments of principal and interest shall be made in
lawful money of the United States in Federal or other immediately available
funds at the office of Morgan Guaranty Trust Company of New York, 60 Wall
Street, New York, New York.

     All Loans made by the Bank, the respective types and maturities thereof and
all repayments of the principal thereof shall be recorded by the Bank and, if
the Bank so elects in connection with any transfer or enforcement hereof,
appropriate notations to evidence the foregoing information with respect to each
such Loan then outstanding may be endorsed by the Bank on the schedule attached
hereto, or on a continuation of such schedule attached to and made a part
hereof; provided that the failure of the Bank to make any such recordation or
endorsement shall not affect the obligations of any Obligor hereunder or under
the Credit Agreement.

     This note is one of the Notes referred to in the Five-Year Credit Agreement
dated as of December 11, 1997 among the Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the banks listed on the signature pages thereof
and Morgan Guaranty Trust Company of New York, as Administrative Agent (as the
same may be amended from time to time, the "Credit
                                       
<PAGE>
 
Agreement"). Terms defined in the Credit Agreement are used herein with the same
meanings. Reference is made to the Credit Agreement for provisions for the
prepayment hereof and the acceleration of the maturity hereof.

     Pursuant to the Credit Agreement payment of principal and interest on this
Note is unconditionally guaranteed by the Guarantors named above.



                                        ACE LIMITED



                                        By
                                          --------------------------------------
                                        Title:
<PAGE>
 
                                 Note (cont'd)

                        LOANS AND PAYMENTS OF PRINCIPAL



<TABLE>
<CAPTION>
 
- ---------------------------------------------------------------------------------
                                          Amount of
              Amount of       Type of     Principal      Maturity      Notation
   Date         Loan            Loan       Repaid          Date         Made By
- ---------------------------------------------------------------------------------
   <S>          <C>          <C>        <C>             <C>             <C>

- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------
</TABLE>

<PAGE>
 
                                                                       EXHIBIT B



                      Form of Money Market Quote Request
                      ----------------------------------



                                    [Date]



To:       Morgan Guaranty Trust Company of New York
          (the "Administrative Agent")

From:     [Name of Borrower]

Re:       Five-Year Credit Agreement (as amended, the "Credit Agreement") dated
          as of December 11, 1997 among the Borrower, A.C.E. Insurance Company,
          Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest
          Reinsurance Company Limited, as Guarantors, the Banks listed on the
          signature pages thereof and the Administrative Agent

          We hereby give notice pursuant to Section 2.03 of the Credit Agreement
that we request Money Market Quotes for the following proposed Money Market
Borrowing(s):

Date of Borrowing:  __________________

Principal Amount*                       Interest Period**
- ----------------                        ---------------  

$


          Such Money Market Quotes should offer a Money Market [Margin]
[Absolute Rate]. [The applicable base rate is the London Interbank Offered
Rate.]

- -----------------------
               *Amount must be $10,000,000 or a larger multiple of $1,000,000.

               **Not less than one month (LIBOR Auction) or not less than 7 days
(Absolute Rate Auction), subject to the provisions of the definition of Interest
Period.
<PAGE>
 
          Terms used herein have the meanings assigned to them in the Credit
Agreement.


                                        ACE LIMITED



                                        By: 
                                           ----------------------------
                                        Title:
<PAGE>
 
                                                                       EXHIBIT C



                  Form of Invitation for Money Market Quotes
                  ------------------------------------------



To:                  [Name of Bank]


Re:                  Invitation for Money Market Quotes to [Name of Borrower]
                     (the "Borrower")



     Pursuant to Section 2.03 of the Five-Year Credit Agreement dated as of
December 11, 1997, as amended, among the Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the Banks parties thereto and the undersigned,
as Administrative Agent, we are pleased on behalf of the Borrower to invite you
to submit Money Market Quotes to the Borrower for the following proposed Money
Market Borrowing(s):

Date of Borrowing: 
                   -------------------   

Principal Amount                   Interest Period
- ----------------                   ---------------

$



     Such Money Market Quotes should offer a Money Market [Margin] [Absolute
Rate]. [The applicable base rate is the London Interbank Offered Rate.]

     Please respond to this invitation by no later than [2:00 P.M.] [9:30 A.M.]
(New York City time) on [date].


                             MORGAN GUARANTY TRUST
                              COMPANY OF NEW YORK



                             By 
                                ----------------------------
                                Authorized Officer

                                      

<PAGE>
 
                                                                       EXHIBIT D



                          Form of Money Market Quote
                          --------------------------



To:       Morgan Guaranty Trust Company of New York,
          as Administrative Agent

Re:       Money Market Quote to [Name of Borrower] (the "Borrower")


          In response to your invitation on behalf of the Borrower dated
_____________, 19__, we hereby make the following Money Market Quote on the
following terms:


1.   Quoting Bank:  
                    --------------------------------

2.   Person to contact at Quoting Bank:


     ----------------------------------

3.   Date of Borrowing:                     *
                        --------------------

4.   We hereby offer to make Money Market Loan(s) in the following principal
     amounts, for the following Interest Periods and at the following rates:


Principal  Interest    Money Market
Amount**   Period***  [Margin****] [Absolute Rate*****]
- ---------  ---------  ---------------------------------


- -------------------------

               *As specified in the related Invitation.

               **Principal amount bid for each Interest Period may not exceed
          principal amount requested. Specify aggregate limitation if the sum of
          the individual offers exceeds the amount the Bank is willing to lend.
          Bids must be made for $5,000,000 or a larger multiple of $1,000,000.

               ***Not less than one month or not less than 7 days, as specified
          in the related Invitation. No more than five bids are permitted for
          each Interest Period.

               ****Margin over or under the London Interbank Offered Rate
          determined for the applicable Interest Period. Specify percentage (to
          the nearest 1/10,000 of 1%) and specify whether "PLUS" or "MINUS".

               *****Specify rate of interest per annum (to the nearest
          1/10,000th of 1%).

<PAGE>
 
          $



          $



          [Provided, that the aggregate principal amount of Money Market Loans
          for which the above offers may be accepted shall not exceed
          $____________.]**



          We understand and agree that the offer(s) set forth above, subject to
the satisfaction of the applicable conditions set forth in the Five-Year Credit
Agreement dated as of December 11, 1997 among the Borrower, A.C.E. Insurance
Company, Ltd. and Corporate Officers & Directors Assurance Ltd. and Tempest
Reinsurance Company Limited, as Guarantors, the Banks listed on the signature
pages thereof and yourselves, as Administrative Agent, irrevocably obligates us
to make the Money Market Loan(s) for which any offer(s) are accepted, in whole
or in part.


                                       Very truly yours,



                                       [NAME OF BANK]



Dated:____________________                By:_________________________________
                                             Authorized Officer

                                       
<PAGE>
 
                                                                      EXHIBIT H



                     FORM OF DAVIS POLK & WARDWELL OPINION
                     -------------------------------------



                               December 11, 1997



To the Banks and the Administrative Agent
 Referred to Below
c/o Morgan Guaranty Trust Company
 of New York, as Administrative Agent
60 Wall Street
New York, New York  10260-0060

Ladies and Gentlemen:


     We have participated in the preparation of the Five-Year Credit Agreement
(the "Credit Agreement") dated as of December 11, 1997 among ACE Limited, a
Cayman Islands company limited by shares, A.C.E. Insurance Company, Ltd., a
Bermuda limited liability company, Corporate Officers & Directors Assurance
Ltd., a Bermuda limited liability company, and Tempest Reinsurance Company
Limited, a Bermuda limited liability company, as Guarantors, the Banks listed on
the signature pages thereof (the "Banks") and Morgan Guaranty Trust Company of
New York, as Administrative Agent, and have acted as special United States
counsel for the Agents for the purpose of rendering this opinion pursuant to
Section 3.01(e) of the Credit Agreement. Terms defined in the Credit Agreement
are used herein as therein defined.

     We have examined originals or copies, certified or otherwise identified to
our satisfaction, of such documents, corporate records, certificates of public
officials and other instruments and have conducted such other investigations of
fact and law as we have deemed necessary or advisable for purposes of this
opinion.

     Upon the basis of the foregoing, we are of the opinion that:


     1.   The execution, delivery and performance by the Borrower of the Credit
Agreement and the Notes are within the Borrower's corporate powers and have been
duly authorized by all necessary corporate action.

     2.   The execution, delivery and performance by each Guarantor of the
Credit Agreement are within such Guarantor's corporate powers and have been duly
authorized by all necessary corporate action.

     
<PAGE>

To the Banks and the Agent             2                       December 11, 1997
     Referred to Below
 
     3.   The Credit Agreement constitutes a valid and binding agreement of the
Borrower and each Note constitutes a valid and binding obligation of the
Borrower, in each case enforceable in accordance with its terms, except as the
same may be limited by bankruptcy, insolvency or similar laws affecting
creditors' rights generally and by general principles of equity.

     4.   The Credit Agreement constitutes a valid and binding agreement of each
Guarantor enforceable in accordance with its terms, except as the same may be
limited by bankruptcy, insolvency or similar laws affecting creditors' rights
generally and by general principles of equity.


     In giving the foregoing opinion we have relied, with your consent and
without independent investigation, as to all matters governed by the laws of (i)
the Cayman Islands, upon the opinion of Maples and Calder dated the date hereof,
a copy of which has been delivered by you pursuant to Section 3.01(b) of the
Credit Agreement and (ii) Bermuda, upon the opinion of Conyers, Dill & Pearman
dated the date hereof, a copy of which has been delivered to you pursuant to
Section 3.01(c) of the Credit Agreement.

     This opinion is rendered solely to you in connection with the above matter.
This opinion may not be relied upon by you for any other purpose or relied upon
by any other Person without our prior written consent.


                                       Very truly yours,

                                       
<PAGE>
 
                                                                      EXHIBIT I



                      ASSIGNMENT AND ASSUMPTION AGREEMENT



     AGREEMENT dated as of __________ __, 19__ among [ASSIGNOR] (the
"Assignor"), [ASSIGNEE] (the "Assignee"), ACE Limited, ACE US Holdings, Inc.
("ACE US"), A.C.E. Insurance Company, Ltd ("ACE Insurance") and MORGAN GUARANTY
TRUST COMPANY OF NEW YORK, as Issuing Bank and as Administrative Agent (the
"Administrative Agent").


                            W I T N E S S E T H
                            - - - - - - - - - -


     WHEREAS, this Assignment and Assumption Agreement (the "Assignment
Agreement") relates to (i) the Five-Year Credit Agreement (as amended from time
to time, the "Five Year Credit Agreement") and the 364-Day Credit Agreement (as
amended from time to time, the "364-Day Credit Agreement") each dated as of
December 11, 1997 among ACE Limited, as Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the Assignor and the other Banks party thereto,
as Banks, and the Administrative Agent, (ii) the Term Loan Agreement (as amended
from time to time, the "Term Loan Agreement") the dated as of December 11, 1997
among ACE US, as Borrower, ACE Limited, as Guarantor, the Assignor and the other
Banks party thereto, as Banks, and the Administrative Agent and (iii) the
Amended and Restated Reimbursement Agreement dated as of December 11, 1997 among
ACE Insurance, the Assignor and the other Banks party thereto and the
Administrative Agent (the "Reimbursement Agreement" and together with the Five-
Year Credit Agreement, the 364-Day Credit Agreement and the Term Loan Agreement,
collectively, "the Facilities");

     WHEREAS, under the Five-Year Credit Agreement, the Assignor has a
Commitment to make Loans to ACE Limited and participate in Letters of Credit in
an aggregate principal amount at any time outstanding not to exceed $__________;

     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the 
Five-Year Credit Agreement in the aggregate principal amount of $__________ are
outstanding at the date hereof;

     WHEREAS, Letters of Credit with a total amount available for drawing under
the Five-Year Credit Agreement of $____________ are outstanding at the date
hereof;

     WHEREAS, under the 364-Day Credit Agreement, the Assignor has a Commitment
to make Loans to ACE Limited in an aggregate principal amount at any time
outstanding not to exceed $_________;

     
<PAGE>
      
     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the 364-
Day Credit Agreement in the aggregate principal amount of $_________ are
outstanding at the date hereof;

     WHEREAS, under the Term Loan Agreement, the Assignor has [a Commitment to
make][outstanding] Loans to ACE US in an aggregate principal amount of
$_____________;

     WHEREAS, pursuant to the Reimbursement Agreement, the Assignor is a
participant to the extent of _____% in up to (P)153,683,466 of Letters of Credit
outstanding thereunder;

     WHEREAS, the Assignor proposes to assign to the Assignee an aggregate
interest in the Facilities of $__________, comprised as follows: (i) all of the
rights of the Assignor under the Five-Year Credit Agreement in respect of a
portion of its Commitment thereunder in an amount equal to $__________ (the
"Five-Year Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans and Letter of Credit Liabilities thereunder, (ii)
all of the rights of the Assignor under the 364-Day Credit Agreement in respect
of a portion of its Commitment thereunder in an amount equal to $_____________
(the "364-Day Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans thereunder, (iii) all of the rights of the Assignor
under the Term Loan Agreement in respect of a portion of its [Commitment]
[Loans] thereunder in an amount equal to $_______________ (the "Term Loan
Assigned Amount" and, together with the Five-Year Assigned Amount and the 364-
Day Assigned Amount, collectively the "Assigned Amounts"), and (iv) a portion of
the rights and obligations of the Assignor under the Reimbursement Agreement
equivalent to a Participation Percentage of ____% (the "Assigned Percentage"),
and the Assignee proposes to accept assignment of such rights and assume the
corresponding obligations from the Assignor on such terms;

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

     SECTION 1.  Definitions. All capitalized terms not otherwise defined herein
shall have the respective meanings set forth in the Five-Year Credit Agreement,
the 364-Day Credit Agreement, the Term Loan Agreement and the Reimbursement
Agreement, as applicable.

     SECTION 2.  Assignment.  The Assignor hereby assigns and sells to the
Assignee all of the rights of the Assignor under each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement and the Term Loan Agreement to the
extent of the Five-Year Assigned Amount, the 364-Day Assigned Amount and the
Term Loan Assigned Amount, respectively, and under the Reimbursement Agreement
to the extent of the Assigned Percentage, and the Assignee hereby accepts such
assignment from the Assignor and assumes all of the obligations of the Assignor
under each of the Five-Year Credit Agreement, the 364-Day Credit Agreement and
the Term Loan Agreement to the extent of the Five-year Assigned Amount, the 364-
Day Assigned Amount and the Term Loan Assigned Amount and under the
Reimbursement Agreement to the extent of

                                       85
<PAGE>
 
the Assigned Percentage, including the purchase from the Assignor of the
corresponding portion of the principal amount of the Committed Loans made by the
Assignor and Letter of Credit Liabilities of and the corresponding portion of
the participating interests of the Assignor in the Letters of Credit under the
Reimbursement Agreement, outstanding at the date hereof. Upon the execution and
delivery hereof by the Assignor, the Assignee, ACE Limited, ACE US, ACE
Insurance, the Issuing Bank(s) and the Administrative Agent and the payment of
the amounts specified in Section 3 required to be paid on the date hereof (i)
the Assignee shall, as of the date hereof, succeed to the rights and be
obligated to perform the obligations of the Assignor under each of the Five-Year
Credit Agreement, the 364-Day Credit Agreement and the Term Loan Agreement with
a Commitment in an amount equal to the Five-Year Assigned Amount, the 364-Day
Assigned Amount and the Term Loan Assigned Amount, respectively and under the
Reimbursement Agreement to the extent of the Assigned Percentage, and (ii) the
Commitment of the Assignor under each of the Facilities and the Participation
Percentage of the Assignor under the Reimbursement Agreement shall, as of the
date hereof, be reduced by the corresponding amount and the Assignor released
from its obligations under each of the Five-Year Credit Agreement, the 364-Day
Credit Agreement, the Term Loan Agreement and the Reimbursement Agreement to the
extent such obligations have been assumed by the Assignee. The assignment
provided for herein shall be without recourse to the Assignor.

     SECTION 3.  Payments.  As consideration for the assignment and sale
contemplated in Section 2 hereof, the Assignee shall pay to the Assignor on the
date hereof in Federal funds the amount heretofore agreed between them.****** It
is understood that ticking and/or facility fees accrued to the date hereof are
for the account of the Assignor and such fees accruing from and including the
date hereof are for the account of the Assignee. Each of the Assignor and the
Assignee hereby agrees that if it receives any amount under any Related Document
which is for the account of the other party hereto, it shall receive the same
for the account of such other party to the extent of such other party's interest
therein and shall promptly pay the same to such other party.

     SECTION 4.  Consents.  This Agreement is conditioned upon the consent of
the Administrative Agent and the Issuing Bank(s) and ACE Limited, ACE US and ACE
Insurance, pursuant to Section 10.06(c) of each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement and the Term Loan Agreement and Section
8.06(c) of the Reimbursement Agreement. The execution of this Agreement by such
persons is evidence of such consents. Pursuant to Section 10.06(c) of each of
the 364-Day Credit Agreement, the Five-Year Credit Agreement and the Term Loan
Agreement, each of ACE Limited and ACE US, respectively, agrees to execute and
deliver a Note payable to the order of the Assignee to evidence the assignment
and assumption provided for herein.

- ----------------
          ******Amount should combine principal together with accrued interest
     and breakage compensation, if any, to be paid by the Assignee, net of any
     portion of any upfront fee to be paid by the Assignor to the Assignee.

                                       
<PAGE>
 
     SECTION 5.  Non-Reliance on Assignor.  The Assignor makes no representation
or warranty in connection with, and shall have no responsibility with respect
to, the solvency, financial condition, or statements of any of ACE Limited and
its subsidiaries or the validity and enforceability of the obligations of ACE
Limited and its subsidiaries under the Related Documents. The Assignee
acknowledges that it has, independently and without reliance on the Assignor,
and based on such documents and information as it has deemed appropriate, made
its own credit analysis and decision to enter into this Agreement and will
continue to be responsible for making its own independent appraisal of the
business, affairs and financial condition of ACE Limited and its subsidiaries.

     SECTION 6.  Governing Law.  This Agreement shall be governed by and
construed in accordance with the laws of the State of New York.

     SECTION 7.  Counterparts.  This Agreement may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered by their duly authorized officers as of the date first above
written.

                                               [ASSIGNOR]



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


                                               [ASSIGNEE]


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


                                               ACE LIMITED


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


                                               ACE US HOLDINGS, INC.


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


                                               A.C.E. INSURANCE COMPANY, LTD.


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

                                      
<PAGE>
 
                       MORGAN GUARANTY TRUST
                       COMPANY OF NEW YORK, as Issuing 
                       Bank and as Administrative Agent



                         By
                                 --------------------------------
                           Title:
<PAGE>
 
                                                                       EXHIBIT J


                            [CT Corporation System]



                               December 11, 1997



To the Persons Identified on
 Schedule A Attached Hereto:


     We have reviewed (i) the Five-Year Credit Agreement dated as of December
11, 1997 (the "Five-Year Credit Agreement") and the 364-Day Credit Agreement
(the "364-Day Credit Agreement") each among ACE Limited, as Borrower, A.C.E.
Insurance Company, Ltd., Corporate Officers & Directors Assurance Ltd. and
Tempest Reinsurance Company Limited, as Guarantors, the Banks listed therein,
and Morgan Guaranty Trust Company of New York, as Administrative Agent, (ii) the
Term Loan Agreement (the "Term Loan Agreement") dated as of December 11, 1997
among ACE US Holdings, Inc., as Borrower, ACE Limited, as Guarantor, the Banks
listed therein and Morgan Guaranty Trust Company of New York, as Administrative
Agent, (iii) the Subordinated Loan Agreement dated as of December 11, 1997 (the
"Subordinated Loan Agreement") among ACE US Holdings, Inc., as Borrower, A.C.E.
Insurance Company, Ltd., as Lender and Morgan Guaranty Trust Company of New
York, as Administrative Agent and (iv) the Amended and Restated Reimbursement
Agreement dated as of December 11, 1997 among A.C.E. Insurance Company, Ltd., as
Account Party, the Banks listed therein and Morgan Guaranty Trust Company of New
York, as Issuing Bank and Agent (the "Amended and Restated Reimbursement
Agreement" and together with the Five-Year Credit Agreement, the 364-Year Credit
Agreement, the Term Loan Agreement and the Subordinated Loan Agreement,
collectively, the "Agreements"), in each of which CT Corporation System is named
as agent to receive service of process in the State of New York on behalf of (a)
the Borrower and each Guarantor under each of the Five-Year Credit Agreement and
the 364-Day Credit Agreement, (b) the Borrower and the Guarantor under the Term
Loan Agreement, (c) the Borrower and the Lender under the Subordinated Loan
Agreement and (d) the Account Party under the Amended and Restated Reimbursement
Agreement, at the address of 1633 Broadway, New York, New York 10019. Upon
review of our appointment outlined in Section 10.10(b) of each of the 364-Day
Credit Agreement, the Five-Year Credit Agreement and the Term Loan Agreement,
Section 8(c) of the Subordinated Loan Agreement and Section 8.10(b) of the
Amended and Restated Reimbursement Agreement, we understand that our role as
registered agent is confined to receiving service of process only. We also
understand that the term of our appointment as registered agent under each such
Agreements shall remain in effect until each of the Agreements shall have been
terminated and all obligations thereunder of each Borrower, each

<PAGE>
 
Guarantor, the Lender and the Account Party shall have been paid in full, or
until such time as we are instructed in writing by the Administrative Agent to
discontinue our service.

     We accept and confirm our appointment as registered agent and we understand
that any notice or process received by us in our capacity as registered agent
shall be promptly sent by telephone, fax, telex, cable or any other means of
instant communication, and thereafter by reputable overnight carrier to:

     On Behalf of the Borrower and each Guarantor under each of the 364-Day
Credit Agreement and the Five-Year Credit Agreement and the Guarantor under the
Term Loan Agreement:

                              ACE Limited
                              The ACE Building
                              30 Woodbourne Avenue
                              Hamilton HM 08, Bermuda
                              (Fax 441-295-5221)

                       with copy to:
                              Morgan Guaranty Trust
                              Company of New York
                              60 Wall Street
                              New York, NY  10260-0060
                              (Fax 212-648-5249)

     On behalf of the Borrower under the Term Loan Agreement and the
Subordinated Loan Agreement

                              ACE US Holdings, Inc.
                              Six Concourse Parkway Suite, Suite 2700
                              Atlanta, GA 30374

                       with copy to:
                              Morgan Guaranty Trust
                              Company of New York
                              60 Wall Street
                              New York, NY  10260-0060
                              (Fax 212-648-5249)

                                       
<PAGE>
 
     On behalf of the Account Party under the Amended and Restated Reimbursement
Agreement and the Lender under the Subordinated Loan Agreement

                           A.C.E. Insurance Company, Ltd.
                           The ACE Building
                           30 Woodbourne Avenue
                           Hamilton HM 08, Bermuda
                           (Fax 441-295-5221)

                    with copy to:  
                           Morgan Guaranty Trust
                            Company of New York
                           60 Wall Street
                           New York, NY  10260-0060
                           (Fax 212-648-5249)


     We appreciate this opportunity to be of service.


                                         Very truly yours,


                                         CT CORPORATION SYSTEM


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

<PAGE>
 
                                                                      SCHEDULE A


Morgan Guaranty Trust Company
  of New York, as Issuing Bank
  and as Administrative Agent

Morgan Guaranty Trust Company
  of New York

Mellon Bank, N.A.

Citibank, N.A.

The Bank of New York

The Bank of Tokyo-Mitsubishi Trust, Ltd.

Barclays Bank PLC

Deutsche Bank AG, New York and/or
  Cayman Islands Branch

Fleet National Bank

ING Bank, N.V.

Royal Bank of Canada

The Bank of Bermuda, Ltd.

Banque Nationale de Paris

The Chase Manhattan Bank

Credit Lyonnais New York Branch

Dresdner Bank A.G., New York Branch
  and Grand Cayman Branch
<PAGE>
 
The First National Bank of Chicago

State Street Bank and Trust Company

ACE Limited, as Borrower under the
  364-Day Credit Agreement and the
  Five-Year Credit Agreement and as
  Guarantor under the Term Loan Agreement

A.C.E. Insurance Company, Ltd., as Guarantor
  under the 364-Day Credit Agreement and
  the Five-Year Credit Agreement, as Account
  Party under the Amended and Restated
  Reimbursement Agreement and as Lender under
  the Subordinated Loan Agreement

Corporate Officers & Directors
  Assurance Ltd., as Guarantor under
  the 364-Day Credit Agreement and
  the Five-Year Credit Agreement

Tempest Reinsurance Company Limited,
  as Guarantor under the 364-Day Credit
  Agreement and the Five-Year Credit
  Agreement

ACE US Holdings, Inc., as Borrower under
  the Term Loan Agreement and as Borrower
  under the Subordinated Loan Agreement

<PAGE>
 
                                                                   EXHIBIT 10.32

                                                                  EXECUTION COPY



                              (pound)153,683,466

                             AMENDED AND RESTATED
                            REIMBURSEMENT AGREEMENT

                                  dated as of

                               December 11, 1997

                                     among

                        A.C.E. Insurance Company, Ltd.,

                            The Banks Listed Herein

                                      and

                  Morgan Guaranty Trust Company of New York,
                   as Issuing Bank and Administrative Agent

                          ___________________________

                          J.P. Morgan Securities Inc.
                                      and
                               Mellon Bank N.A.,
                             Co-Syndication Agents

                  Morgan Guaranty Trust Company of New York,
                              Documentation Agent
<PAGE>
 
<TABLE> 
<CAPTION> 
                              TABLE OF CONTENTS*

                                ______________ 
                                                                           PAGE
                                                                           ---- 
<S>                                                                        <C> 
                                   ARTICLE 1
                                  DEFINITIONS

SECTION 1.01.  Definitions................................................   1
SECTION 1.02.  Accounting Terms and Determinations........................   8
SECTION 1.03.  United States Dollars and English Pounds...................   9
                                                                            
                                   ARTICLE 2                                
                             THE LETTERS OF CREDIT                          
                                                                            
SECTION 2.01.  Letters of Credit..........................................   9
SECTION 2.02.  Notice of Extension........................................   9
SECTION 2.03.  Drawings under Letters of Credit; Reimbursement............  10
SECTION 2.04.  Obligations Absolute.......................................  13
SECTION 2.05.  Indemnification............................................  14
SECTION 2.06.  Fees.......................................................  15
SECTION 2.07.  Increased Costs; Reduced Return............................  16
SECTION 2.08.  Payments and Computations..................................  17

                                   ARTICLE 3
                                  CONDITIONS

SECTION 3.01.  Conditions Precedent to Closing............................  18
SECTION 3.02.  Conditions Precedent to Extension of the Letters of Credit.  19

                                   ARTICLE 4
                        REPRESENTATIONS AND WARRANTIES

SECTION 4.01.  Corporate Existence and Power..............................  20
SECTION 4.02.  Corporate and Governmental Authorization; No                 
                Contravention.............................................  20
SECTION 4.03.  Binding Effect.............................................  20
SECTION 4.04.  Financial Information......................................  20
SECTION 4.05.  Litigation.................................................  21
SECTION 4.06.  ERISA......................................................  21
SECTION 4.07.  Taxes......................................................  21
SECTION 4.08.  Not an Investment Company..................................  22
SECTION 4.09.  Full Disclosure............................................  22
</TABLE> 
                                                                            
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                           PAGE
                                                                           ----
<S>                                                                        <C> 
SECTION 4.10.  Compliance with Laws.......................................  22
SECTION 4.11.  Lien.......................................................  22

                                   ARTICLE 5
                                   COVENANTS

SECTION 5.01.  Information................................................  23
SECTION 5.02.  Payment of Obligations.....................................  25
SECTION 5.03.  Maintenance of Property; Insurance.........................  25
SECTION 5.04.  Conduct of Business and Maintenance of Existence...........  25
SECTION 5.05.  Compliance with Laws.......................................  25
SECTION 5.06.  Inspection of Property, Books and Records..................  26
SECTION 5.07.  Leverage...................................................  26
SECTION 5.08.  Subsidiary Debt............................................  26
SECTION 5.09.  Minimum Tangible Net Worth.................................  26
SECTION 5.10.  Negative Pledge............................................  27
SECTION 5.11.  Consolidations, Mergers and Sales of Assets................  28
SECTION 5.12.  No Amendments..............................................  28
SECTION 5.13.  ERISA......................................................  28
                                                                            
                                   ARTICLE 6                                
                                   DEFAULTS                                 
                                                                            
SECTION 6.01.  Events of Default..........................................  28
SECTION 6.02.  Notice of Default..........................................  31

                                   ARTICLE 7
                                  THE AGENTS

SECTION 7.01.  Appointment and Authorization..............................  32
SECTION 7.02.  Administrative Agent and Affiliates........................  32
SECTION 7.03.  Action by Administrative Agent.............................  32
SECTION 7.04.  Consultation with Experts..................................  32
SECTION 7.05.  Liability of Administrative Agent..........................  32
SECTION 7.06.  Indemnification............................................  33
SECTION 7.07.  Credit Decision............................................  33
SECTION 7.08.  Successor Administrative Agent.............................  34
SECTION 7.09.  Administrative Agent's Fee.................................  34
SECTION 7.10.  Other Agents...............................................  34
</TABLE> 

                                      ii
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                          PAGE
                                                                          ----
<S>                                                                       <C> 
                                   ARTICLE 8
                                 MISCELLANEOUS

SECTION 8.01.  Notices....................................................  34
SECTION 8.02.  No Waivers.................................................  35
SECTION 8.03.  Expenses; Indemnification..................................  35
SECTION 8.04.  Sharing; Set-offs..........................................  36
SECTION 8.05.  Amendments and Waivers.....................................  37
SECTION 8.06.  Successors and Assigns.....................................  37
SECTION 8.07.  Collateral.................................................  39
SECTION 8.08.  Governing Law..............................................  39
SECTION 8.09.  Counterparts; Integration..................................  39
SECTION 8.10.  Judicial Proceedings.......................................  39
SECTION 8.11.  Judgment Currency..........................................  40
SECTION 8.12.  WAIVER OF JURY TRIAL.......................................  41
SECTION 8.13.  Taxes......................................................  41
SECTION 8.14.  Confidential Information...................................  42
SECTION 8.15.  References in Other Financing Documents....................  43
SECTION 8.16.  Amendment to Pledge Agreement..............................  43
SECTION 8.17.  Substitution of Bank.......................................  43
</TABLE> 

Schedule I     -    Participation of Banks
Exhibit A      -    Letters of Credit
Exhibit B      -    Opinion of Conyers, Dill & Pearman, special Bermuda
                    counsel for the Custodian
Exhibit C      -    Opinion of Conyers, Dill & Pearman, special Bermuda
                    counsel for the Company
Exhibit D      -    Opinion of Mayer, Brown & Platt, New York counsel for
                    the Company
Exhibit E      -    Opinion of Davis Polk & Wardwell, special United States
                    counsel for the Issuing Bank and the Agents
Exhibit F      -    Letter from CT Corporation System
Exhibit G      -    Form of Letter of Credit Request
Exhibit H      -    Form of Pledge Agreement
Exhibit I      -    Form of Custodian Agreement

______________________

         *The Table of Contents is not part of this Agreement.

                                      iii
<PAGE>
 
                                                                            PAGE
                                                                            ----

                                      iv
<PAGE>
 
                 AMENDED AND RESTATED REIMBURSEMENT AGREEMENT



         AMENDED AND RESTATED  REIMBURSEMENT  AGREEMENT dated as of December 11,
1997 among A.C.E.  INSURANCE  COMPANY,  LTD.,  the BANKS listed on the signature
pages hereof and MORGAN  GUARANTY TRUST COMPANY OF NEW YORK, as Issuing Bank and
Administrative Agent.

                             W I T N E S S E T H :
                             - - - - - - - - - -
 
         WHEREAS,   the  parties   hereto  have   heretofore   entered   into  a
Reimbursement  Agreement  dated as of November 22, 1996 (as amended prior to the
Restatement Date, the "Original Agreement"); and

         WHEREAS,  the parties  hereto wish to amend the  Original  Agreement to
increase the Letter of Credit Commitment  thereunder to  (pound)153,683,466  and
make certain other changes thereto,  and to restate the Original Agreement as so
amended;

         NOW, THEREFORE, the parties hereto hereby agree as follows:

                                   ARTICLE 1
                                  DEFINITIONS

         SECTION 1.01. Definitions. The following terms, as used herein, have
the following meanings:

         "ACE LIMITED" means ACE Limited,  a Cayman Islands  company  limited by
shares, and its successors.

         "ADMINISTRATIVE  AGENT" means Morgan Guaranty Trust Company of New York
in its  capacity  as  administrative  agent  for the Banks  under the  Financing
Documents, and its successors in such capacity.

         "AGENT"  means  each of the  Administrative  Agent,  the  Documentation
Agent, the Syndication Agents, the Managing Agent or the Co-Agents, and "Agents"
means any combination of them, as the context may require.

         "ADMINISTRATIVE QUESTIONNAIRE" means, with respect to each Bank, an
administrative questionnaire in the form prepared by the Administrative Agent
<PAGE>
 
and  submitted to the  Administrative  Agent (with a copy to the  Company)  duly
completed by such Bank.

         "AGREEMENT"  means the Original  Agreement,  as amended and restated by
this Amended  Agreement and as the same may be further amended from time to time
in accordance with the terms hereof.

         "AMENDED  AGREEMENT"  means this  Amended  and  Restated  Reimbursement
Agreement  dated as of  December  11,  1997  among  the  parties  listed  on the
signature pages hereof.

         "APPLICANT"  means  each  of (i) ACE  Capital  Limited,  a  corporation
incorporated  under the laws of England and Wales, and its successors,  (ii) ACE
Staff Corporate  Member Limited,  a corporation  incorporated  under the laws of
England  and  Wales,  and its  successors,  (iii)  ACE  Capital  II  Limited,  a
corporation   incorporated  under  the  laws  of  England  and  Wales,  and  its
successors,   and  (iv)  ZIC  Lloyd's   Underwriting   Limited,   a  corporation
incorporated under the laws of England and Wales, and its successors.

         "ASSIGNEE" has the meaning set forth in Section 8.06(c).

         "BANK" means each bank listed on the signature pages hereof,  each bank
or  other  financial  institution  which  becomes  a Bank  pursuant  to  Section
2.01(b)(iii) and each Assignee which becomes a Bank pursuant to Section 8.06(c),
and their respective successors.

         "BASE RATE" means, for any day, a rate per annum equal to the higher of
(i) the Prime  Rate for such day and (ii) the sum of 1/2 of 1% plus the  Federal
Funds Rate for such day.

         "BERMUDA  COMPANIES  LAW" means The Companies  Act 1981 of Bermuda,  as
amended, and the regulations promulgated thereunder.

         "BERMUDA  INSURANCE  LAW" means The Insurance  Act 1978 of Bermuda,  as
amended, and the regulations promulgated thereunder.

         "BUSINESS DAY" means any day except a Saturday,  Sunday or other day on
which  commercial banks in New York City or London are authorized or required by
law to close.

         "CO-AGENT"  means each Bank  designated  as a Co-Agent on the signature
pages hereof, in its capacity as co-agent in respect of this Amended Agreement.

                                       2
<PAGE>
 
         "CODA" means Corporate  Officers & Directors  Assurance Ltd., a Bermuda
limited liability company, and its successors.

         "COLLATERAL" has the meaning set forth in the Pledge Agreement.

         "COMPANY" means A.C.E. Insurance Company, Ltd., a Bermuda limited
liability company, and its successors.

         "CONFIRMATION  AGREEMENT"  means the  Confirmation and Agreement of The
Bank of Bermuda  Limited  dated  November  22,  1996,  as  amended,  between the
Custodian and the Administrative  Agent,  substantially in the form of Exhibit B
to the Pledge Agreement.

         "CONSOLIDATED  DEBT"  means at any date the Debt of the Company and its
Consolidated Subsidiaries, determined on a consolidated basis as of such date.

         "CONSOLIDATED NET INCOME" means, for any period,  the net income of the
Company and its Consolidated  Subsidiaries,  determined on a consolidated  basis
for such period.

         "CONSOLIDATED  SUBSIDIARY"  means at any date any  Subsidiary  or other
entity the accounts of which would be consolidated  with those of the Company in
its  consolidated  financial  statements if such  statements were prepared as of
such date.

         "CONSOLIDATED  TANGIBLE NET WORTH"  means at any date the  consolidated
stockholder's equity of the Company and its Consolidated Subsidiaries less their
consolidated  Intangible Assets,  all determined as of such date;  provided that
such  determination  for purposes of Sections 5.07,  5.09 and 5.10 shall be made
without  giving  effect to  adjustments  pursuant  to  Statement  No. 115 of the
Financial   Accounting   Standards   Board.  For  purposes  of  this  definition
"Intangible  Assets"  means the amount (to the extent  reflected in  determining
such  consolidated  stockholder's  equity)  of (i)  all  write-ups  (other  than
write-ups  resulting from foreign currency  translations and write-ups of assets
of a going concern  business made within twelve months after the  acquisition of
such business)  subsequent to June 30, 1997 in the book value of any asset owned
by the  Company  or a  Consolidated  Subsidiary  and (ii) all  unamortized  debt
discount and expense,  unamortized deferred charges, deferred acquisition costs,
goodwill,  patents,  trademarks,  service marks, trade names, anticipated future
benefit of tax loss  carry-forwards,  copyrights,  organization or developmental
expenses and other intangible assets.

                                       3
<PAGE>
 
         "CUSTODIAN"  means  The Bank of  Bermuda  Limited  in its  capacity  as
Custodian under the Custodian Agreement.

         "CUSTODIAN  AGREEMENT" means the Custodian Agreement dated November 19,
1996, as amended, between the Custodian and the Company.

         "DEBT" of any Person means at any date,  without  duplication,  (i) all
obligations  of such Person for borrowed  money,  (ii) all  obligations  of such
Person evidenced by bonds, debentures, notes or other similar instruments, (iii)
all obligations of such Person to pay the deferred purchase price of property or
services,  except  trade  accounts  payable  arising in the  ordinary  course of
business, (iv) all obligations of such Person as lessee which are capitalized in
accordance with generally accepted accounting principles, (v) all non-contingent
obligations  (and,  solely for purposes of Section 5.10 and the  definitions  of
Material Debt and Material Financial Obligations, all contingent obligations) of
such Person to  reimburse  any bank or other  Person in respect of amounts  paid
under a letter of credit or similar instrument,  (vi) all Debt secured by a Lien
on any asset of such Person, whether or not such Debt is otherwise an obligation
of such Person, and (vii) all Debt of others Guaranteed by such Person, provided
that the term "Debt" shall not include obligations of an insurance company under
insurance policies or surety bonds issued by it.

         "DEFAULT"  means any condition or event which  constitutes  an Event of
Default  or which  with the  giving of  notice  or lapse of time or both  would,
unless cured or waived, become an Event of Default.

         "DERIVATIVES  OBLIGATIONS"  of any Person means all obligations of such
Person in  respect  of any rate  swap  transaction,  basis  swap,  forward  rate
transaction,  commodity  swap,  commodity  option,  equity or equity index swap,
equity or equity index  option,  bond  option,  interest  rate  option,  foreign
exchange transaction,  cap transaction,  floor transaction,  collar transaction,
currency swap transaction, cross-currency rate swap transaction, currency option
or other similar  transaction  (including  any option with respect to any of the
foregoing transactions) or any combination of the foregoing transactions.

         "DOCUMENTATION  AGENT" means Morgan  Guaranty Trust Company of New York
in its capacity as documentation agent in respect of this Amended Agreement.

         "EFFECTIVE DATE" means the date the Original Agreement became effective
in accordance with Section 8.09 thereof.

                                       4
<PAGE>
 
         "ERISA" means the Employee  Retirement  Income Security Act of 1974, as
amended, or any successor statute.

         "ERISA  GROUP"  means,  with respect to any Person,  such  Person,  any
Subsidiary of such Person and all members of a controlled  group of corporations
and all trades or businesses  (whether or not incorporated) under common control
which, together with such Person or any such Subsidiary, are treated as a single
employer under Section 414 of the Internal Revenue Code.

         "EVENT OF DEFAULT" has the meaning set forth in Section 6.01.

         "FEDERAL  FUNDS RATE" means,  for any day, the rate per annum  (rounded
upward,  if  necessary,  to the  nearest  1/100th  of 1%) equal to the  weighted
average of the rates on overnight Federal funds transactions with members of the
Federal  Reserve  System  arranged  by Federal  funds  brokers  on such day,  as
published by the Federal  Reserve Bank of New York on the Domestic  Business Day
next  succeeding  such  day,  provided  that (i) if such  day is not a  Domestic
Business  Day,  the  Federal  Funds Rate for such day shall be such rate on such
transactions on the next preceding  Domestic Business Day as so published on the
next succeeding  Domestic Business Day, and (ii) if no such rate is so published
on such next succeeding  Domestic  Business Day, the Federal Funds Rate for such
day shall be the average  rate quoted to Morgan  Guaranty  Trust  Company of New
York on such day on such transactions as determined by the Administrative Agent.

         "FINANCING DOCUMENTS" means this Agreement,  the Letters of Credit, the
Pledge  Agreement,  the Notice of Pledge,  the  Confirmation  Agreement  and the
Custodian  Agreement,  and any  agreement,  instrument or document  executed and
delivered in connection  with or relating to any Letter of Credit,  in each case
as the same may be amended and in effect from time to time.

         "GUARANTEE"  by  any  Person  means  any   obligation,   contingent  or
otherwise,  of such Person directly or indirectly  guaranteeing  any Debt of any
other  Person  and,  without  limiting  the  generality  of the  foregoing,  any
obligation,  direct or indirect,  contingent or otherwise, of such Person (i) to
purchase or pay (or advance or supply funds for the purchase or payment of) such
Debt (whether  arising by virtue of  partnership  arrangements,  by agreement to
keep-well, to purchase assets, goods, securities or services, to take-or-pay, or
to maintain  financial  statement  conditions or otherwise) or (ii) entered into
for the purpose of  assuring in any other  manner the holder of such Debt of the
payment  thereof or to protect such holder  against loss in respect  thereof (in
whole  or  in  part),  provided  that  the  term  Guarantee  shall  not  include
endorsements  for collection or deposit in the ordinary course of business.  The
term "Guarantee" used as a verb has a corresponding meaning.

                                       5
<PAGE>
 
         "INDEMNITEE" has the meaning set forth in Section 8.03(b).

         "INTERNAL  REVENUE  CODE" means the Internal  Revenue Code of 1986,  as
amended, or any successor statute.

         "ISSUING  BANK"  means  Morgan  Guaranty  Trust  Company of New York as
issuer of the Letters of Credit hereunder.

         "LETTERS OF CREDIT" means the standby letters of credit set forth in
Exhibit A.

         "LETTER OF CREDIT COMMITMENT" means (pound)153,683,466.

         "LETTER OF CREDIT LIABILITIES" means, for any Bank and at any time, the
sum of (x) the amounts then owing to such Bank (including in its capacity as the
Issuing  Bank) by the Company to reimburse it in respect of amounts  drawn under
the Letters of Credit,  including in respect of participations purchased by such
Bank pursuant to Section  2.02(a) and (y) such Bank's ratable  participation  in
the aggregate amount then available for drawing under the Letters of Credit.

         "LIEN" means,  with respect to any asset, any mortgage,  lien,  pledge,
charge,  security  interest  or  encumbrance  of any kind,  or any other type of
preferential  arrangement  that has the practical  effect of creating a security
interest,  in respect of such asset.  For the  purposes of this  Agreement,  the
Company shall be deemed to own subject to a Lien any asset which it has acquired
or holds  subject to the  interest of a vendor or lessor  under any  conditional
sale  agreement,  capital lease or other title retention  agreement  relating to
such asset.

         "MANAGING AGENT" means Citibank, N.A. in its capacity as managing
agent in respect of this Amended Agreement.

         "MATERIAL  DEBT"  means Debt of the  Company  and/or one or more of its
Subsidiaries,  arising in one or more related or unrelated  transactions,  in an
aggregate principal or face amount exceeding $25,000,000.

         "MATERIAL  FINANCIAL  OBLIGATIONS"  means a principal or face amount of
Debt and/or current payment obligations in respect of Derivatives Obligations of
the  Company  and/or  one or more of its  Subsidiaries,  arising  in one or more
related or unrelated transactions, exceeding in the aggregate $25,000,000.

         "MLA COST" has the meaning set forth in Section 2.03.

         "NOTICE OF EXTENSION" has the meaning set forth in Section 2.02.

                                       6
<PAGE>
 
         "NOTICE OF PLEDGE" means the Notice of Pledge dated  November 22, 1996,
as amended, between the Company and the Custodian,  substantially in the form of
Exhibit A to the Pledge Agreement.

         "ORIGINAL AGREEMENT" has the meaning set forth in the recitals hereto.

         "OVERDUE RATE" has the meaning set forth in Section 2.03.

         "OVERNIGHT STERLING RATE" has the meaning set forth in Section 2.03.

         "PARENT" has the meaning set forth in Section 2.07(b).

         "PARTICIPATION  PERCENTAGE"  means,  with  respect  to each  Bank,  the
percentage  of  participation  by such  Bank in the  Letters  of  Credit  issued
hereunder  as set forth in Schedule I, as modified as a result of an  assignment
pursuant to Section 8.06.

         "PLEDGE  AGREEMENT" means the Pledge Agreement dated as of November 22,
1996 between the Company and the Administrative Agent, substantially in the form
of Exhibit H hereto,  as executed and  delivered  and as the same may be amended
and in effect from time to time.

         "PRIME  RATE" means the rate of interest  publicly  announced by Morgan
Guaranty  Trust  Company  of New York in New York  City from time to time as its
Prime Rate.

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

         "REIMBURSEMENT OBLIGATION" has the meaning set forth in Section
2.03(a).

         "RELATED  DOCUMENTS"  means  (i)  the  Financing  Documents,  (ii)  the
"Financing  Documents" as defined in each of the Five-Year  Credit Agreement and
the 364-Day  Credit  Agreement,  each dated as of December 11,  1997,  among ACE
Limited, as borrower,  the guarantors  including the Company party thereto,  the
Banks  party  thereto  and  Morgan  Guaranty  Trust  Company  of  New  York,  as
administrative  agent for such  Banks and (iii)  the  "Financing  Documents"  as
defined in the Term Loan  Agreement  dated as of December  11, 1997 among ACE US
Holdings,  Inc.,  as borrower,  ACE Limited,  as  guarantor,  the Banks  parties
thereto and Morgan Guaranty Trust Company of New York, as  administrative  agent
for such Banks,  in each case as the same may be amended and in effect from time
to time.

                                       7
<PAGE>
 
         "REQUIRED BANKS" means at any time Banks having at least 66 2/3% of the
aggregate Letter of Credit Liabilities.

         "RESTATEMENT  DATE"  means  the date  this  Amended  Agreement  becomes
effective in accordance with Section 3.01 hereof.

         "SUBPARTICIPANT" has the meaning set forth in Section 8.06(b).

         "SUBSIDIARY"  means, as to any Person,  any corporation or other entity
of which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons  performing  similar
functions are at the time directly or  indirectly  owned by such Person;  unless
otherwise specified, "Subsidiary" means a Subsidiary of the Company.

         "SYNDICATION AGENT" means either J.P. Morgan Securities Inc. or Mellon
Bank N.A. in its capacity as a syndication agent in respect of this Agreement,
and "Syndication Agents" means both of them.

         "TERMINATION  DATE" means,  with respect to each Letter of Credit,  the
initial expiry date of such Letter of Credit or, if it is extended,  the date to
which such Letter of Credit is so extended.

         "UCP" means the Uniform Customs and Practice for Documentary Credits
of the International Chamber of Commerce, 1993 Revision (Publication No. 500).

         "WHOLLY-OWNED  CONSOLIDATED  SUBSIDIARY"  means, as to any Person,  any
Consolidated  Subsidiary  all of the shares of capital stock or other  ownership
interests  of  which  (except  directors'  qualifying  shares)  are at the  time
directly  or  indirectly  owned  by such  Person;  unless  otherwise  specified,
"Wholly-Owned   Consolidated  Subsidiary"  means  a  Wholly-Owned   Consolidated
Subsidiary of the Company.

         SECTION 1.02.  Accounting  Terms and  Determinations.  Unless otherwise
specified  herein,  all accounting  terms used herein shall be interpreted,  all
accounting  determinations hereunder shall be made, and all financial statements
required to be delivered  hereunder  shall be prepared in accordance with United
States generally accepted accounting  principles as in effect from time to time,
applied on a basis consistent  (except for changes concurred in by the Company's
independent  public  accountants)  with the  most  recent  audited  consolidated
financial statements of the Company and its Consolidated  Subsidiaries delivered
to the Banks;  provided that, if the Company notifies the  Administrative  Agent
that the  Company  wishes to amend any  covenant in Article V to  eliminate  the
effect  of  any  change  in  generally  accepted  accounting  principles  on the
operation of such

                                       8
<PAGE>
 
covenant (or if the Administrative  Agent notifies the Company that the Required
Banks wish to amend Article V for such purpose),  then the Company's  compliance
with  such  covenant  shall be  determined  on the basis of  generally  accepted
accounting  principles  in effect  immediately  before  the  relevant  change in
generally  accepted  accounting  principles became effective,  until either such
notice is withdrawn or such covenant is amended in a manner  satisfactory to the
Company and the Required Banks.

         SECTION 1.03. United States Dollars and English Pounds.  Each reference
herein to (i) "DOLLARS" or "$" or (ii)  "STERLING"  OR "(POUND)"  shall refer to
the respective  lawful currencies of the United States of America and the United
Kingdom.

                                   ARTICLE 2
                             THE LETTERS OF CREDIT

         SECTION 2.01.  Letters of Credit. The Letters of Credit have heretofore
been  issued  and  will  remain  outstanding  on the  Restatement  Date.  On the
Restatement Date, subject to satisfaction of the applicable conditions specified
in Section 3.01, (i) the Issuing Bank shall be deemed, without further action by
any party  hereto,  to have sold to each  Bank,  and each Bank  shall be deemed,
without  further action by any party hereto,  to have purchased from the Issuing
Bank, a participation  in each Letter of Credit and the related Letter of Credit
Liabilities ratably in accordance with its Participation Percentage and (ii) the
participations  heretofore granted by the Issuing Bank in certain of the Letters
of Credit to certain of the parties hereto shall terminate.

         SECTION  2.02.  Notice  of  Extension.  (a)  If it  wishes  to  request
extension of a Letter of Credit,  the  Applicant  therefor and the Company shall
give the Issuing Bank  notice,  by a Letter of Credit  Extension  Request in the
form of Exhibit G hereto,  by September 15 of each year,  specifying the date to
which the Termination Date of the applicable  Letter of Credit is to be extended
and the requested  effective date of such extension  (such notice,  a "Notice of
Extension").

          (b) Upon  receipt of a Notice of  Extension,  the  Issuing  Bank shall
promptly  notify  each Bank of the  contents  thereof  and of the amount of such
Bank's participation in the applicable Letter of Credit. Each Bank party to this
Agreement agrees that it will give notice to the Issuing Bank and the Company on
or before  October 15 as to whether it agrees to the requested  extension of the
Letters of Credit,  provided that the failure of any Bank to give such notice or
any delay in giving the same shall be deemed to be a notice from such Bank by

                                       9
<PAGE>
 
October  15 that it does not agree to such  extension,  and no such  Bank  shall
incur any obligation or liability as a result of any such failure or delay.

          (c) If any Bank  party to this  Agreement  gives (or is deemed to have
given) notice that it does not agree to a requested extension as contemplated by
subsection (b), then the Company may designate by October 31 of such year a bank
or other financial  institution which is willing to assume all of the rights and
obligations of such Bank under this  Agreement and the other Related  Documents,
such bank or other financial institution to be subject to the written consent of
the Issuing Bank (such  consent not to be  unreasonably  withheld by the Issuing
Bank in its good  faith  business  judgment).  In that case such Bank  agrees to
assign such rights and  obligations to such  designated  bank or other financial
institution  and  enter  into an  agreement  therefor  with such  other  bank or
financial institution pursuant to which such bank or other financial institution
agrees to pay to such Bank all amounts  then due and owing (and all fees accrued
to but  excluding the date of such  agreement) to such Bank  hereunder and under
each  other  Financing  Document,  in which  case such Bank shall no longer be a
party hereto (except as to Sections 2.05,  2.07 and 8.03 for the period prior to
the date of such agreement) and such bank or other financial  institution  shall
become a Bank party hereto.

          (d) On or after November 10 and on or before November 25 of each year,
the Issuing  Bank shall give notice of  non-extension  of each Letter of Credit,
unless (x) it has theretofore  timely received Notice of Extension in respect of
such Letter of Credit, (y) all of the other conditions contained in Section 3.02
are then  satisfied and (z) each Bank party to this  Agreement  has  theretofore
agreed in writing to a requested  extension in respect of such Letter of Credit,
confirming the  Participation  Percentage of such Bank in such Letter of Credit;
provided  that no  failure  by the  Issuing  Bank to give  any  such  notice  of
termination  and no delay in giving any such notice shall affect the obligations
of (i) the  Company to  reimburse  the Issuing  Bank for any  drawing  under any
Letter  of  Credit  or (ii) any Bank to pay to the  Issuing  Bank an  amount  in
respect of such Bank's ratable share of any such drawing.

          (e) The  extension by the Issuing Bank of each Letter of Credit shall,
in addition to the conditions  precedent set forth in Article III, be subject to
the conditions precedent that the Company shall have executed and delivered such
other  instruments  and  agreements  relating  to such  Letter  of Credit as the
Issuing Bank shall have reasonably requested.

         SECTION 2.03. Drawings under Letters of Credit; Reimbursement. (a) Upon
receipt from the  beneficiary of any Letter of Credit of any notice of a drawing
under such Letter of Credit,  the Issuing Bank shall promptly notify the Company
and each other Bank as to the amount to be paid as a result of such

                                      10
<PAGE>
 
drawing  and  the  payment   date.   The  Company  shall  be   irrevocably   and
unconditionally  obligated  forthwith  to  reimburse  the  Issuing  Bank for any
amounts  paid by the Issuing  Bank upon any  drawing  under any Letter of Credit
(each, a "Reimbursement  Obligation"),  without presentment,  demand, protest or
other  formalities  of any kind.  All such  amounts paid by the Issuing Bank and
remaining unpaid by the Company shall bear interest, payable on demand, for each
day until paid at a rate per annum equal to the Overdue Rate.

         "OVERDUE  RATE"  means a rate per annum  equal to (i) with  respect  to
payments due in dollars,  the sum of the Base Rate plus 2% and (ii)with  respect
to payments due in Sterling, the sum of 2% plus the Overnight Sterling Rate plus
the MLA Cost. For this purpose:

         The "OVERNIGHT  STERLING RATE" applicable to any unpaid amount for each
day until paid  means a rate per annum  equal to the rate per annum at which one
day (or, if such amount due remains unpaid more than three  Business Days,  then
for such other period of time not longer than three months as the Administrative
Agent may select) deposits in Sterling in an amount  approximately equal to such
unpaid amount and for the  applicable  period  determined as provided  above are
offered  to  the  Administrative   Agent  in  the  London  interbank  market  at
approximately 11:00 A.M. (London time) on the first day of such period.

         The "MLA  COST"  for each day  means a rate  per  annum  calculated  in
accordance with the following formula:

         BY+L(Y-X) + S(Y-Z) % per annum = MLA Cost

                   100 - (B+S)

         where on the day of application of the formula:

         B        is the  percentage  of  the  Administrative  Agent's  eligible
                  liabilities (as such term is defined by the Bank of England on
                  the  date of  such  application)  which  the  Bank of  England
                  requires    the    Administrative    Agent    to    hold    on
                  non-interest-bearing deposit in accordance with its cash ratio
                  requirements;

         Y        the rate per annum at which deposits in Sterling, in an amount
                  equal to the  amount  by  reference  to which  the  applicable
                  Overnight Sterling Rate was calculated,  for a period equal to
                  the period in  question,  are  offered  to the  Administrative
                  Agent in the London  interbank  market at or about  11:00 A.M.
                  (London  time)  on  the  day  on  which  the  rate  is  to  be
                  determined;

                                      11
<PAGE>
 
         L        is the  percentage of eligible  liabilities  which the Bank of
                  England  requires  the  Administrative  Agent to  maintain  as
                  secured  money  with  members of the  London  Discount  Market
                  Association  and/or as secured call money with  certain  money
                  brokers and gilt-edged primary market makers;

         X        is the rate at which secured  Sterling  deposits may be placed
                  by  the  Administrative  Agent  with  members  of  the  London
                  Discount Market  Association and/or as secured call money with
                  certain money brokers and gilt-edged  primary market makers at
                  or about 11:00 A.M. (London time) on that day for the relevant
                  period;

         S        is the  percentage  of  the  Administrative  Agent's  eligible
                  liabilities   which   the  Bank  of   England   requires   the
                  Administrative  Agent to place as a special  deposit  (as such
                  term is  defined  by the Bank of  England  on the date of such
                  application); and

         Z        is the interest  rate per annum allowed by the Bank of England
                  on special deposits.

         In the application of the formula,  B, Y, L, X, S and Z are included in
the formula as figures and not as  percentages,  e.g. if B=0.5% and Y=15%, BY is
calculated as 0.5 x 15 and each rate  calculated in accordance  with the formula
is, if necessary  rounded upward to four decimal places.  If the  Administrative
Agent determines that a change in circumstance has rendered, or will render, the
formula inappropriate,  the Administrative Agent shall notify the Company of the
manner in which the MLA Cost will  subsequently  be  calculated.  The  manner of
calculation  so notified by the  Administrative  Agent shall,  in the absence of
manifest error, be binding on the Company.

         The Overdue Rate  applicable to any Sterling  payment shall be adjusted
automatically on and as of the effective date of any change in the MLA Cost.

          (b) In addition,  each Bank will pay to the Issuing  Bank  immediately
upon the Issuing  Bank's demand at any time during the period  commencing  after
such drawing  until  reimbursement  therefor in full by the  Company,  an amount
equal  to such  Bank's  ratable  share of such  drawing  (in  proportion  to its
participation therein),  together with interest on such amount for each day from
the date of the Issuing  Bank's  demand for such  payment (or, if such demand is
made  after  12:00  Noon  (New  York  City  time)  on such  date,  from the next
succeeding Business Day) to the date of payment by such Bank of such amount at a
rate of interest  per annum equal to the Overdue  Rate.  Each Bank shall also be
liable  for its pro  rata  share of any  amounts  paid by the  Company  that are
subsequently

                                      12
<PAGE>
 
rescinded or avoided,  or are  otherwise  restored or returned.  Such  liability
shall be  unconditional  and without  regard to the occurrence of any Default or
the compliance by the Company with any of its  obligations  under this Agreement
or any other Financing Document.  The Issuing Bank will pay to each Bank ratably
all  amounts  received  from the  Company  for  application  in  payment  of its
reimbursement  obligations  in respect of any Letter of Credit,  but only to the
extent such Bank has made  payment to the Issuing Bank in respect of such Letter
of Credit pursuant hereto.

         SECTION 2.04.  Obligations Absolute. The obligations of the Company and
each Bank under Section 2.03 shall be absolute,  unconditional  and irrevocable,
and shall be performed  strictly in accordance with the terms of this Agreement,
under all circumstances  whatsoever,  including without limitation the following
circumstances:

               (i)   any lack of validity or enforceability of this Agreement or
         any Letter of Credit or any other Financing Document;

               (ii)  any amendment or waiver of or any consent to departure from
         all or any of the provisions of this Agreement or any Letter of Credit
         or any other Financing Document;

               (iii) the use which may be made of any Letter of Credit by, or
         any acts or omission of, a beneficiary of a Letter of Credit (or any
         Person for whom such beneficiary may be acting);

               (iv)  the existence of any claim, set-off, defense or other
         rights that the Company may have at any time against a beneficiary of a
         Letter of Credit (or any Person for whom such beneficiary may be
         acting), the Banks (including the Issuing Bank) or any other Person,
         whether in connection with this Agreement or any Letter of Credit or
         any other Financing Document or any unrelated transaction;

               (v)   any statement or any other document presented under a
         Letter of Credit proving to be forged, fraudulent or invalid in any
         respect or any statement therein being untrue or inaccurate in any
         respect whatsoever;

               (vi)  payment under a Letter of Credit against presentation to
         the Issuing Bank of a draft or certificate that does not comply with
         the terms of such Letter of Credit, provided that the Issuing Bank's
         determination that documents presented under such Letter of Credit
         comply with the terms thereof shall not have constituted gross
         negligence or willful misconduct of the Issuing Bank; or

                                      13
<PAGE>
 
               (vii) any other act or omission to act or delay of any kind by
         any Bank (including, without limitation, the Issuing Bank), the
         Administrative Agent or any other Person or any other event or
         circumstance whatsoever that might, but for the provisions of this
         clause (vii), constitute a legal or equitable discharge of the
         Company's or the Bank's obligations hereunder.

         SECTION 2.05.  Indemnification.  (a) The Company hereby indemnifies and
holds  harmless each Bank  (including  the Issuing Bank) and the  Administrative
Agent from and against any and all claims, damages, losses,  liabilities,  costs
or expenses which such Bank or the  Administrative  Agent may incur hereunder or
under  any  other  Financing  Document  or in  connection  with any  transaction
contemplated  hereby or thereby  (including,  without  limitation,  any  claims,
damages, losses, liabilities, costs or expenses which the Issuing Bank may incur
by reason of or in  connection  with the failure of any other Bank to fulfill or
comply with its  obligations  to the Issuing Bank  hereunder (but nothing herein
contained  shall affect any rights the Company may have against such  defaulting
Bank)),   and  none  of  the  Banks   (including   the  Issuing  Bank)  nor  the
Administrative  Agent nor any of their  officers or  directors  or  employees or
agents shall be liable or  responsible,  by reason of or in connection  with the
execution  and  delivery  or  transfer of or payment or failure to pay under any
Letter  of  Credit,  including  without  limitation  any  of  the  circumstances
enumerated in Section 2.04, as well as (i) any error, omission,  interruption or
delay in transmission  or delivery of any message,  by mail,  cable,  telegraph,
telex or otherwise,  (ii) any loss or delay in the  transmission of any document
required  in order to make a  drawing  under a Letter  of  Credit  and (iii) any
consequences  arising  from  causes  beyond  the  control of the  Issuing  Bank,
including  without  limitation  any government  acts;  provided that the Company
shall not be required to  indemnify  the Issuing  Bank for any claims,  damages,
losses,  liabilities,  costs or  expenses,  and the  Company  shall have a claim
against the Issuing Bank for direct (but not  consequential)  damage suffered by
it, to the extent found by a court of competent jurisdiction to have been caused
by (x) the failure of the Issuing Bank to meet the  standards  prescribed by the
UCP in  determining  whether a  request  presented  under  any  Letter of Credit
complied  with the terms of such  Letter of  Credit  or (y) the  Issuing  Bank's
failure  to pay under any  Letter of Credit  after the  presentation  to it of a
request  strictly  complying  with the terms and  conditions  of such  Letter of
Credit except as a direct result of court orders  prohibiting such payment;  and
provided  further that the Company  shall not be required to indemnify  any Bank
(other than the Issuing  Bank the  indemnification  of which under this  Section
2.05 is governed by the preceding proviso) or the  Administrative  Agent for any
claims, damages,  losses,  liabilities,  costs or expenses suffered by it to the
extent  found by a court of  competent  jurisdiction  to have been caused by its
willful misconduct or gross negligence. Nothing in this Section 2.05 is intended
to limit the obligations of the

                                      14
<PAGE>
 
Company  under  Section  2.03 of this  Agreement.  To the extent the  Company is
obligated  to but  does not  indemnify  the  Issuing  Bank as  required  by this
subsection,  the  Banks  agree  to  do  so  ratably  in  accordance  with  their
Participation Percentage.

          (b)  The parties hereto agree that in making any payment under any
Letter of Credit by the Issuing Bank none of the following shall constitute or
be deemed to constitute the willful misconduct or gross negligence of the
Issuing Bank: (i) the Issuing Bank's exclusive reliance on any document
(including without limitation any draft) presented to it under such Letter of
Credit as to any and all matters set forth therein, including reliance on the
amount of any draft presented thereunder, whether or not the amount due to the
beneficiary thereof equals the amount of such draft, and whether or not any
document presented thereunder proves to be inaccurate or otherwise insufficient
in any respect, if such document on its face appears to be in order and whether
or not such document or any statement contained therein proves to be forged or
invalid or inaccurate or untrue in any respect whatsoever and (ii) any non-
material, non-compliance by the documents (including without limitation any
draft) presented under any Letter of Credit with the terms thereof.

         SECTION 2.06.  Fees.  (a) Ticking Fee. On January 1, 1998,  the Company
shall pay to the  Administrative  Agent, for the account of each Bank (including
the Issuing  Bank),  a ticking fee on the amount set forth below,  at a rate per
annum equal to .06 of 1%,  calculated on a 360-day basis. Such ticking fee shall
accrue for each day from and  including  the  Restatement  Date to but excluding
January 1, 1998,  on such Bank's  Participation  Percentage of the excess of (i)
the Letter of Credit  Commitment  over (ii) the daily average  aggregate  amount
available to be drawn under the Letters of Credit then outstanding.

          (b)  Letter  of  Credit  Fee.  The  Company   agrees  to  pay  to  the
Administrative Agent, for the account of each Bank (including the Issuing Bank),
a letter of credit  fee with  respect to each  Letter of  Credit,  at a rate per
annum equal to .15 of 1%, calculated on a 360-day basis, for the period from and
including the  Restatement  Date to but excluding the  Termination  Date of such
Letter of Credit, on such Bank's  Participation  Percentage of the daily average
amount available at any time to be drawn under such Letter of Credit. The letter
of credit  fees  shall be payable  quarterly,  with  respect  to each  Letter of
Credit, in arrears on the last Business Day of each March,  June,  September and
December and on its Termination Date.

          (c)  Fronting Fee. The Company agrees to pay to the Issuing Bank for
its own account, as compensation for its services hereunder, a fronting fee for
each

                                      15
<PAGE>
 
issuance of a Letter of Credit in the amounts and at the times agreed upon by
the Company and the Issuing Bank.

          SECTION 2.07.  Increased Costs; Reduced Return. (a) If, on or after
the date of this Agreement, the adoption of any applicable law, rule or
regulation, or any change in any applicable law, rule or regulation, or any
change in the interpretation or administration thereof by any governmental
authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by any Bank with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency, (i) shall impose, modify or deem applicable any reserve
(including, without limitation, any such requirement imposed by the Board of
Governors of the Federal Reserve System), special deposit, insurance assessment
or similar requirement against letters of credit issued by, or assets of, or
deposits with or for the account of, or credit extended by, any Bank or (ii)
shall impose on any Bank any other condition regarding this Agreement or any
Letter of Credit and the result of any of the foregoing is to increase the cost
to such Bank of issuing or maintaining such Letter of Credit (or its
participation therein), or funding any drawings thereunder, or reduce the amount
of any sum received or receivable by such Bank under this Agreement, by an
amount deemed by such Bank to be material, then, within 45 days after demand by
such Bank (with a copy to the Administrative Agent), the Company shall pay to
such Bank all additional amounts which are necessary to compensate such Bank for
such increased cost or reduction.

          (b)  If any Bank shall have determined that, after the date hereof,
the adoption of any applicable law, rule or regulation regarding capital
adequacy, or any change in any applicable law, rule or regulation, or any change
in the interpretation or administration thereof by any governmental authority,
central bank or comparable agency charged with the interpretation or
administration thereof, or any request or directive regarding capital adequacy
(whether or not having the force of law) of any such authority, central bank or
comparable agency, has or would have the effect of reducing the rate of return
on capital of such Bank (or any Person controlling such Bank (a "PARENT")) as a
consequence of its obligations hereunder or under any Letter of Credit to a
level below that which such Bank (or its Parent) could have achieved but for
such adoption, change, request or directive (taking into consideration its
policies with respect to capital adequacy) by an amount deemed by such Bank to
be material, then from time to time, within 45 days after demand by such Bank,
the Company agrees to pay to such Bank such additional amount or amounts as will
compensate such Bank for such reduction.

                                       16
<PAGE>
 
          (c)  Each Bank will promptly notify the Company of any event of which
it has knowledge, occurring after the date hereof, which will entitle such Bank
to compensation pursuant to this Section 2.07. A certificate of any Bank
claiming compensation under this Section 2.07 and setting forth the additional
amount or amounts to be paid to it hereunder shall be conclusive in the absence
of manifest error. In determining such amount, such Bank may use any reasonable
averaging and attribution methods. Notwithstanding the foregoing subsections
2.07(a) and 2.07(b) of this Section 2.07, the Company shall only be obligated to
compensate any Bank for any amount arising or accruing during (i) any time or
period commencing not more than 180 days prior to the date on which such Bank
notifies the Administrative Agent and the Company that it proposes to demand
such compensation and identifies to the Administrative Agent and the Company the
statute, regulation or other basis upon which the claimed compensation is or
will be based and (ii) any time or period during which because of the
retroactive application of such statute, regulation or other such basis, such
Bank did not know in good faith that such amount would arise or accrue.

          SECTION 2.08.  Payments and  Computations.  (a) The Company shall make
each payment of Reimbursement Obligations, fees, interest and other amounts
payable hereunder to the Administrative Agent, as provided herein, not later
than 2:00 P.M. (New York City time) on the day when due in English Pounds in the
case of Reimbursement Obligations or in United States Dollars in the case of
fees, interest or other amounts payable hereunder immediately available at an
address of the Administrative Agent specified in writing to the Company by the
Administrative Agent. The Administrative Agent will promptly distribute to each
Bank its ratable share of each such payment received by the Administrative Agent
for the account of such Bank. Each payment shall be made without any set-off,
counterclaim or deduction.

          (b)  Whenever any payment to be made hereunder shall be stated to be
due on a day which is not a Business Day, such payment shall be made on the next
succeeding Business Day, and such extension of time shall in such case be
included in any computation of interest or fees.

          (c)  In the event that any payment to the Administrative Agent
hereunder is made after 2:00 P.M. (London or New York City time, as relevant) on
a Business Day, such payment shall be deemed received on the immediately
following Business Day, and such extension of time shall be included in any
computation of interest or fees.

                                       17
<PAGE>
 
                                   ARTICLE 3
                                  CONDITIONS

          SECTION 3.01.  Conditions Precedent to Closing.  The Restatement Date
hereunder shall occur upon satisfaction of the condition described in clause (h)
below and receipt by the Administrative Agent of the following documents, each
dated the Restatement Date unless otherwise indicated:

          (a)  counterparts hereof signed by each of the parties hereto (or, in
the case of any party as to which an executed counterpart shall not have been
received, receipt by the Administrative Agent in form satisfactory to it of
telegraphic, telex or other written confirmation from such party of execution of
a counterpart hereof by such party);

          (b)  an executed consent of the Custodian to this Amended Agreement;

          (c)  an opinion of Conyers, Dill & Pearman, special Bermuda counsel
for the Custodian, substantially in the form of Exhibit B hereto;

          (d)  an opinion of Conyers, Dill & Pearman, special Bermuda counsel
for the Company, substantially in the form of Exhibit C hereto;

          (e)  an opinion of Mayer, Brown & Platt, New York counsel for the
Company, substantially in the form of Exhibit D hereto;

          (f)  an opinion of Davis Polk & Wardwell, special United States
counsel for the Issuing Bank and the Agents, substantially in the form of
Exhibit E hereto;

          (g)  a letter from CT System in New York, New York, substantially in
the form of Exhibit F hereto, evidencing CT System's agreement to act as agent
for service of process for the Company pursuant to Section 8.10(b);

          (h)  receipt by the Agents and the Banks of all fees accrued or
otherwise due to them on or prior to the Restatement Date; and

          (i)  all documents the Administrative Agent may reasonably request
prior to the Restatement Date relating to the existence of the Company, the
corporate authority for and the validity of this Agreement and each other
Financing Document, the existence, validity, enforceability and first priority
of a Lien in the Collateral (assuming that the Collateral is delivered at the
time, in the amount and as otherwise provided in the Pledge Agreement) and any
other matters relevant hereto, all in form and substance satisfactory to the
Administrative Agent.

                                       18
<PAGE>
 
          On the Restatement Date the Original Agreement will be automatically
amended and restated in its entirety to read as set forth herein. On and after
the Restatement Date the rights and obligations of the parties hereto shall be
governed by this Amended Agreement; provided the rights and obligations of the
parties hereto with respect to the period prior to the Restatement Date
(including, without limitation, entitlement to fees accrued prior to the
Restatement Date) shall continue to be governed by the provisions of the
Original Agreement. The Administrative Agent shall promptly notify the Company
and the Banks of the Restatement Date, and such notice shall be conclusive and
binding on all parties hereto.

          SECTION 3.02.  Conditions Precedent to Extension of the Letters of
Credit. The obligation of the Issuing Bank to extend any Letter of Credit is
subject to the satisfaction of the following conditions 

          (a)  receipt by the Administrative Agent of a Notice of Extension as
required by Section 2.02;

          (b)  the fact that the aggregate amount of the Letter of Credit
Liabilities immediately after such extension will not exceed the Letter of
Credit Commitment;

          (c)  the fact that, immediately before and after such extension, no
Default shall have occurred and be continuing;

          (d)  the fact that the representations and warranties of the Company
contained in this Agreement and in each other Financing Document shall be true
on and as of the date of such extension, except representations and warranties
which expressly refer to an earlier date in which case the same shall be true on
and as of such earlier date; and

          (e)  the fact that such Letter of Credit is being extended solely as
security to support the Applicant's underwriting business at the Society and
Council of Lloyd's provided in accordance with the requirements of the Society
and Council of Lloyd's.

          Such extension shall be deemed to be a representation and warranty by
the Company on the date of such extension as to the facts specified in clauses
(b) through (e), inclusive, of this Section.

                                       19
<PAGE>
 
                                   ARTICLE 4

                        REPRESENTATIONS AND WARRANTIES

     The Company represents and warrants on each day during the term of this
Agreement that:

     SECTION 4.01.  Corporate Existence and Power. The Company is a limited
liability company, duly incorporated and validly existing under the laws of
Bermuda. The Company has all corporate powers and all material governmental
licenses, authorizations, consents and approvals required to carry on its
business as now conducted. The Company is a Wholly-Owned Consolidated Subsidiary
of ACE Limited.

     SECTION 4.02.  Corporate and Governmental Authorization; No Contravention.
The execution, delivery and performance by the Company of this Agreement and the
other Financing Documents to which it is a party are, and each Notice of
Extension given by it hereunder will at the time it is given be, within its
corporate powers, have been duly authorized by all necessary corporate action,
require no action or consent by or in respect of, or filing with, any
governmental body, agency or official and do not contravene, or constitute a
default under, any provision of applicable law or regulation or of the
Memorandum of Association, Articles of Association or Bye-Laws (or any
comparable document) of the Company or of any agreement, judgment, injunction,
order, decree or other instrument binding upon the Company or any of its
Subsidiaries or result in the creation or imposition of any Lien on any asset of
the Company or any of its Subsidiaries.

     SECTION 4.03.  Binding Effect. Each of this Agreement and the other
Financing Documents to which the Company is a party constitutes a valid and
binding agreement of the Company enforceable in accordance with its terms.

     SECTION 4.04.  Financial Information. (a) The consolidated balance sheet of
the Company and its Consolidated Subsidiaries as of September 30, 1996 and the
related consolidated statements of operations and retained earnings and of cash
flows for the fiscal year then ended, all reported on by Coopers & Lybrand LLP,
copies of which have been delivered to each of the Banks, fairly present, in all
material respects, in conformity with generally accepted accounting principles,
the consolidated financial position of the Company and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
retained earnings and cash flows for such fiscal year.

                                      20
<PAGE>
 
          (b)  Since September 30, 1996 there has been no material adverse
change in the business, financial position or results of operations of the
Company and its Consolidated Subsidiaries, considered as a whole.

          (c)  The balance sheet of CODA as of September 30, 1996 and the
related statements of operations and retained earnings and of cash flows for the
fiscal year then ended, all reported on by Coopers & Lybrand LLP, copies of
which have been delivered to each of the Banks, fairly present, in all material
respects, in conformity with generally accepted accounting principles, the
financial position of CODA as of such date and its results of operations and
retained earnings and cash flows for such fiscal year.

          (d)  Since September 30, 1996 there has been no material adverse
change in the business, financial position or results of operations of CODA.

          SECTION 4.05.  Litigation.  Except as disclosed in the notes to the
financial statements referred to in Section 4.04(a), there is no action, suit or
proceeding pending against, or to the knowledge of the Company threatened
against or affecting, the Company or any of its Subsidiaries before any court or
arbitrator or any governmental body, agency or official in which there is a
reasonable likelihood of an adverse decision which could materially adversely
affect the business, consolidated financial position or consolidated results of
operations of the Company and its Consolidated Subsidiaries, considered as a
whole, or which in any manner draws into question the validity or enforceability
of this Agreement or any other Financing Document.

          SECTION 4.06.  ERISA.  Neither the Company nor any member of its ERISA
Group maintains or contributes to, or has within the previous six years (whether
or not while a member of such Person's current ERISA Group) maintained or
contributed to, or been required to maintain or been jointly and severally
liable for contributions to, or has liability upon withdrawal from, any plan or
arrangement subject to (i) the minimum funding standards of ERISA and the
Internal Revenue Code, (ii) Part 3 of Subtitle B of Title I of ERISA or (iii)
Title IV of ERISA.

          SECTION 4.07.  Taxes.  The Company and its Subsidiaries have filed all
income tax returns and all other material tax returns which are required to be
filed by them and have paid all taxes due pursuant to such returns or pursuant
to any assessment received by the Company or any Subsidiary. The charges,
accruals and reserves on the books of the Company and its Subsidiaries in
respect of taxes or other governmental charges are, in the opinion of the
Company, adequate.

                                       21
<PAGE>
 
          SECTION 4.08.  Not an Investment Company.  The Company is not an
"INVESTMENT COMPANY" within the meaning of the Investment Company Act of
1940, as amended.

          SECTION 4.09.  Full  Disclosure.  All written information heretofore
furnished by the Company or on behalf of the Company by ACE Limited to the
Administrative Agent or any Bank for purposes of or in connection with this
Agreement or any of the other Financing Documents or any transaction
contemplated hereby or thereby is, and all such information hereafter furnished
by the Company or on behalf of the Company by ACE Limited to the Administrative
Agent or any Bank will be, true and accurate in all material respects on the
date as of which such information is stated or certified. The Company has
disclosed to the Banks in writing any and all facts which materially and
adversely affect or may affect (to the extent the Company can now reasonably
foresee) the business, operations or financial condition of the Company and its
Consolidated Subsidiaries, taken as a whole, or the ability of the Company to
perform its obligations under this Agreement or any of the other Financing
Documents.

          SECTION 4.10.  Compliance with Laws.  The Company and each Subsidiary
are in compliance, in all material respects, with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Company and its Consolidated
Subsidiaries, considered as a whole.

          SECTION 4.11.  Lien.  (a) Upon delivery of the Collateral to the
Custodian as provided in the Pledge Agreement, the Company will have good and
marketable title in and to the Collateral free and clear of all Liens (except
the Lien created under the Financing Documents) and will hold such title and all
of the Collateral in its own name and not in the name of any nominee or other
Person, except that the Collateral described in clause (i) of the definition of
"Eligible Securities" contained in Section 2(a) of the Pledge Agreement shall be
held in the name of Citibank, N.A. for the account of the Company.

          (b)  Upon delivery of the Collateral to the Custodian as provided in
the Pledge Agreement, the Pledge Agreement will create in favor of the
Administrative Agent for the benefit of the Banks a valid and enforceable first
priority Lien on all of the Collateral, subject to the interest of the Custodian
under the Financing Documents.

                                       22
<PAGE>
 
          (c)  Upon delivery of the Collateral to the Custodian as provided in
the Pledge Agreement, the Company will not have outstanding, nor will it be
contractually bound to create, any Lien on or with respect to any of the
Collateral, subject to the interest of the Custodian under the Financing
Documents.

          (d)  The Company is not subject to any agreement, judgment,
injunction, order, decree or other instrument or any law or regulation which
would prevent or otherwise interfere with the Company's obligations to deliver
Collateral in the amounts, at the times and as otherwise provided in the Pledge
Agreement, subject to the interest of the Custodian under the Financing
Documents.


                                   ARTICLE 5
                                   COVENANTS

          The Company agrees that, so long as any Letter of Credit is in effect
or any Letter of Credit Liability remains unpaid:

          SECTION 5.01.  Information.  The Company will deliver to each of the
Banks:

          (a)  as soon as available and in any event within 90 days after the
end of each fiscal year of the Company, a consolidated balance sheet of the
Company and its Consolidated Subsidiaries as of the end of such fiscal year and
the related consolidated statements of operations and cash flows for such fiscal
year, setting forth in each case in comparative form the figures for the
previous fiscal year, all reported on in a manner acceptable to the Required
Banks by Coopers & Lybrand LLP or other independent public accountants of
nationally recognized standing;

          (b)  as soon as available and in any event within 45 days after the
end of each of the first three quarters of each fiscal year of ACE Limited, a
consolidated balance sheet of ACE Limited and its Consolidated Subsidiaries as
of the end of such quarter and the related consolidated statements of operations
and cash flows for such quarter and for the portion of ACE Limited's fiscal year
ended at the end of such quarter, setting forth in the case of such statements
of operations and cash flows in comparative form the figures for the
corresponding quarter and the corresponding portion of ACE Limited's previous
fiscal year, all certified (subject to normal year-end adjustments) as to
fairness of presentation, generally accepted accounting principles and
consistency by the chief financial officer or the chief accounting officer of
ACE Limited;

                                       23
<PAGE>
 
          (c)  simultaneously with the delivery of each set of financial
statements referred to in clauses (a) and (b) above, a certificate of the chief
financial officer or the chief accounting officer of the Company (i) setting
forth in reasonable detail the calculations required to establish whether the
Company was in compliance with the requirements of Sections 5.07 to 5.10,
inclusive, on the date of such financial statements and (ii) stating whether any
Default exists on the date of such certificate and, if any Default then exists,
setting forth the details thereof and the action which the Company is taking or
proposes to take with respect thereto;

          (d)  within five days after any executive officer of the Company
obtains knowledge of any Default, if such Default is then continuing, a
certificate of the chief financial officer or the chief accounting officer of
the Company setting forth the details thereof and the action which the Company
is taking or proposes to take with respect thereto;

          (e)  as soon as available and in any event within 20 days after
submission, each statutory statement of the Company in the form submitted to The
Insurance Division of the Office of Registrar of Companies of Bermuda.

          (f)  promptly after any executive officer of the Company obtains
knowledge thereof, (i) a copy of any notice from the Minister of Finance or the
Registrar of Companies or any other Person of the revocation, the suspension or
the placing of any restriction or condition on the registration as an insurer of
the Company under the Bermuda Insurance Law or of the institution of any
proceeding or investigation which could result in any such revocation,
suspension or placing of such a restriction or condition, (ii) copies of any
correspondence by, to or concerning the Company relating to an investigation
conducted by the Minister of Finance, whether pursuant to Section 132 of the
Bermuda Companies Law or otherwise and (iii) a copy of any notice of or
requesting or otherwise relating to the winding up or any similar proceeding of
or with respect to the Company; and

          (g)  from time to time such additional information regarding the
financial position, results of operations or business of the Company or any of
its Subsidiaries as the Administrative Agent, at the request of any Bank, may
reasonably request from time to time.

          SECTION 5.02.  Payment of Obligations.  The Company will pay and
discharge, and will cause each Subsidiary to pay and discharge, at or before
maturity, all their respective material obligations and liabilities, including,
without limitation, tax liabilities, except where the same may be contested in
good faith by appropriate proceedings, and will maintain, and will cause each
Subsidiary to 

                                       24
<PAGE>
 
maintain, in accordance with generally accepted accounting principles,
appropriate reserves for the accrual of any of the same.

          SECTION 5.03.  Maintenance of Property;  Insurance. (a) The Company
will keep, and will cause each Subsidiary to keep, all property useful and
necessary in its business in good working order and condition, ordinary wear and
tear excepted.

          (b)  The Company will maintain, and will cause each Subsidiary to
maintain, physical damage insurance on all real and personal property on an all
risks basis (including the perils of flood and quake), covering the repair and
replacement cost of all such property and consequential loss coverage for
business interruption and extra expense. The Company will deliver to the Banks
upon request of any Bank through the Administrative Agent from time to time,
full information as to the insurance carried.

          SECTION 5.04.  Conduct of Business and Maintenance of Existence.  The
Company will continue, and will cause each Subsidiary to continue, to engage in
business of the same general type as now conducted by the Company and its
Subsidiaries, and will preserve, renew and keep in full force and effect, and
will cause each Subsidiary to preserve, renew and keep in full force and effect,
their respective existence and their respective rights, privileges and
franchises necessary or desirable in the normal conduct of business; provided
that nothing in this Section 5.04 shall prohibit (i) the merger of a Subsidiary
into the Company or the merger or consolidation of a Subsidiary with or into
another Person if the corporation surviving such consolidation or merger is a
Subsidiary and if, in each case, after giving effect thereto, no Default shall
have occurred and be continuing or (ii) the termination of the existence of any
Subsidiary if the Company in good faith determines that such termination is in
the best interest of the Company and is not materially disadvantageous to the
Banks.

          SECTION 5.05.  Compliance with Laws.  The Company will comply, and
cause each Subsidiary to comply, in all material respects with all applicable
laws, ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Company and its Consolidated
Subsidiaries, considered as a whole.

                                       25
<PAGE>
 
          SECTION 5.06.  Inspection of Property, Books and Records.  The Company
will keep, and will cause each Subsidiary to keep, proper books of record and
account in accordance with generally accepted accounting principles in which
full, true and correct entries shall be made of all dealings and transactions in
relation to its business and activities; and will permit, and will cause each
Subsidiary to permit, representatives of any Bank at such Bank's expense to
visit and inspect any of their respective properties, to examine and make
abstracts from any of their respective books and records and to discuss their
respective affairs, finances and accounts with their respective officers,
employees and independent public accountants, all at such reasonable times and
as often as may reasonably be desired.

          SECTION 5.07.  Leverage.  Consolidated Debt will at no time exceed 35%
of Consolidated Tangible Net Worth.

          SECTION 5.08.  Subsidiary Debt.  The Company will not permit any of
its Subsidiaries to create, assume or suffer to exist any Debt, except (i) Debt
under the Related Documents, (ii) Debt owing to the Company or a Wholly-Owned
Consolidated Subsidiary, (iii) Debt of Tripar Partnership, a Bermuda general
partnership, owing to other Subsidiaries or Debt of such other Subsidiaries
owing to Tripar Partnership, (iv) Debt in respect of letters of credit issued in
the ordinary course of business, (v) Debt created by exercise of overdraft
privileges on a basis not more frequent than once each calendar month for not
more than five Business Days in an amount not to exceed $50,000,000 in the
aggregate at any one time, (vi) Debt in an amount not to exceed $70,000,000
incurred in connection with the development by the Company and/or any of its
Subsidiaries of the "Bermudiana Site" in Hamilton, Bermuda and (vii) Debt not
permitted by the foregoing clauses of this Section in an aggregate principal
amount not to exceed $20,000,000 at any time outstanding.

         SECTION 5.09.  Minimum Tangible Net Worth.  Consolidated Tangible Net
Worth will at no time be less than (i) $1,000,000,000 plus (ii) 25% of
Consolidated Net Income for each fiscal year of the Company ended after December
31, 1997 and on or prior to such date of determination and for which such
Consolidated Net Income is positive (but with no deduction on account of any
fiscal year for which Consolidated Net Income is negative) plus (iii) 50% of the
aggregate amount by which Consolidated Tangible Net Worth shall have been
increased by reason of the issuance and sale after the Restatement Date and on
or prior to such date of determination of any capital stock or the conversion or
exchange of any Debt of the Company into or with capital stock of the Company
consummated after the Restatement Date and on or prior to such date of
determination.

                                       26
<PAGE>
 
     SECTION 5.10.  Negative Pledge.  Neither the Company nor any Subsidiary
will create, assume or suffer to exist any Lien on any asset now owned or
hereafter acquired by it, except:

     (a)  Liens existing on the date of this Agreement securing Debt outstanding
on the date of this Agreement in an aggregate principal or face amount not
exceeding $25,000,000;

     (b)  any Lien existing on any asset of any corporation at the time such
corporation becomes a Subsidiary and not created in contemplation of such event;

     (c)  any Lien on any asset securing Debt incurred or assumed for the
purpose of financing all or any part of the cost of acquiring such asset,
provided that such Lien attaches to such asset concurrently with or within 90
days after the acquisition thereof;

     (d)  any Lien on any asset of any corporation existing at the time such
corporation is merged or  consolidated  with or into the Company or a Subsidiary
and not created in contemplation of such event;

     (e)  any Lien existing on any asset prior to the acquisition thereof by the
Company or a Subsidiary and not created in contemplation of such acquisition;

     (f)  any Lien arising out of the refinancing, extension, renewal or
refunding of any Debt secured by any Lien permitted by any of the foregoing
clauses of this Section, provided that such Debt is not increased and is not
secured by any additional assets;

     (g)  Liens arising in the ordinary course of its business which (i) do not
secure Debt or Derivatives Obligations, (ii) do not secure any obligation in an
amount exceeding $25,000,000 and (iii) do not in the aggregate materially
detract from the value of its assets or materially impair the use thereof in the
operation of its business;

     (h)  Liens on cash and cash equivalents securing Derivatives Obligations,
provided that the aggregate amount of cash and cash equivalents subject to such
Liens may at no time exceed $25,000,000;

     (i)  Liens securing obligations in respect of letters of credit issued
pursuant to any of the Related Documents; and

                                       27
<PAGE>
 
     (j)  Liens not otherwise permitted by the foregoing clauses of this Section
securing Debt in an aggregate principal or face amount at any date not to exceed
10% of Consolidated Tangible Net Worth.

     SECTION 5.11. Consolidations, Mergers and Sales of Assets. The Company will
not (i) consolidate with or merge into any other Person or (ii) sell, lease or
otherwise transfer, directly or indirectly, all or any substantial part of its
assets to any other Person; provided; that if both immediately before and after
giving effect thereto no Default shall have occurred and be continuing, then the
Company may merge with another Person so long as the Company is the surviving
entity.

     SECTION 5.12.  No Amendments.  The Company shall not amend or waive, or
utilize or rely on any waiver of, any provision of the Pledge Agreement, the
Custodian Agreement or the Notice of Pledge without the written consent of the
Administrative Agent and the Required Banks.

     SECTION 5.13.  ERISA.  Neither the Company nor any member of its ERISA
Group will maintain or contribute to, or become obligated to maintain or become
jointly and severally liable for contributions to, or have liability upon
withdrawal from, any plan or arrangement subject to (i) the minimum funding
standards of ERISA and the Internal Revenue Code, (ii) Part 3 of Subtitle B of
Title I of ERISA or (iii) Title IV of ERISA.


                                   ARTICLE 6
                                   DEFAULTS

     SECTION 6.01.  Events of Default.  If one or more of the following events
("EVENTS OF DEFAULT") shall have occurred and be continuing:

     (a)  the Company shall fail (i) to pay when due any Reimbursement
Obligation or (ii) to pay within five Business Days of the due date thereof any
interest or fees or other amounts payable hereunder;

     (b)  the Company shall fail to observe or perform any covenant (i)
contained in Sections 5.07 through 5.12, inclusive, or (ii) relating to the
delivery of the Collateral and the perfection of the first priority charge and
security interest created therein contained in any other Financing Document;

     (c)  the Company shall fail to observe or perform any covenant or agreement
contained in this Agreement or in any other Financing Document 

                                       28
<PAGE>
 
(other than those covered by clause (a) or (b) above) for 30 days after notice
thereof has been given to the Company by the Administrative Agent at the request
of any Bank;

     (d)  any representation, warranty, certification or statement made by the
Company in this Agreement or any other Financing Document or in any certificate,
financial statement or other document delivered pursuant to this Agreement or
any other Financing Document shall prove to have been incorrect in any material
respect when made (or deemed made);

     (e)  the Company or any Subsidiary shall fail to make any payment in
respect of any Material Financial Obligations when due or within any applicable
grace period or an Event of Default (as defined in any of the Related Documents)
shall have occurred and be continuing;

     (f)  any event or condition shall occur which results in the acceleration
of the maturity of any Material Debt or enables (or, with the giving of notice
or lapse of time or both, would enable) the holder of such Debt or any Person
acting on such holder's behalf to accelerate the maturity thereof; or, without
limiting the foregoing, any "Event of Default" (as defined in any of the other
Related Documents) shall occur;

     (g)  (i) any corporate action is taken authorizing the winding up, the
liquidation, any arrangement or the taking of any other similar action of or
with respect to the Company or authorizing any corporate action to be taken to
facilitate any such winding up, liquidation, arrangement or other similar action
or any petition shall be filed seeking the winding up, the liquidation, any
arrangement or the taking of any other similar action of or with respect to the
Company by the Registrar of Companies in Bermuda, one or more holders of
insurance policies or reinsurance certificates issued by the Company or by any
other Person or Persons or any petition shall be presented for the winding up of
the Company to a court of Bermuda as provided under the Bermuda Companies Law
and in either such case such petition shall remain undismissed and unstayed for
a period of 60 days or any creditors' or members' voluntary winding up of the
Company as provided under the Bermuda Companies Law shall be commenced or any
receiver shall be appointed by a creditor of the Company or by a court of
Bermuda on the application of a creditor of the Company as provided under any
instrument giving rights for the appointment of a receiver;

     (ii)  a proceeding shall be commenced by any Person seeking the
rehabilitation, liquidation, dissolution or conservation of the assets of the
Company or any substantial part thereof or any similar remedy and such
proceedings shall remain undismissed and unstayed for a period of 60 days;

                                       29
<PAGE>
 
     (iii)  the Company or any Subsidiary shall commence a voluntary case or
other proceeding seeking liquidation, reorganization or other relief with
respect to itself or its debts under any bankruptcy, insolvency or other similar
law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, or shall consent to any such relief or to the
appointment of or taking possession by any such official in an involuntary case
or other proceeding commenced against it, or shall make a general assignment for
the benefit of creditors, or shall fail generally to pay its debts as they
become due, or shall take any corporate action to authorize any of the
foregoing; or

     (iv) an involuntary case or other proceeding shall be commenced against the
Company or any Subsidiary seeking liquidation, reorganization or other relief
with respect to it or its debts under any bankruptcy, insolvency or other
similar law now or hereafter in effect or seeking the appointment of a trustee,
receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 days; or an order for
relief shall be entered against the Company or any Subsidiary under the United
States federal bankruptcy laws as now or hereafter in effect;

     (h)  a judgment or order for the payment of money in excess of $25,000,000
shall be rendered against the Company or any Subsidiary and such judgment or
order shall continue unsatisfied and unstayed for a period of 45 days;

     (i)  any person or group of persons (within the meaning of Section 13 or 14
of the Securities Exchange Act of 1934, as amended) shall have acquired
beneficial ownership (within the meaning of Rule 13d-3 promulgated by the
Securities and Exchange Commission under said Act) of 30% or more of the
outstanding shares of voting stock of ACE Limited; or, during any period of 12
consecutive calendar months, individuals who were directors of ACE Limited on
the first day of such period shall cease to constitute a majority of the board
of directors of ACE Limited; or the Company shall cease to be a Wholly-Owned
Consolidated Subsidiary of ACE Limited;

     (j)  any court or arbitrator or any governmental body, agency or official
which has jurisdiction in the matter shall decide, rule or order that any
provision of any of the Financing Documents is invalid or unenforceable in any
material respect, or the Company shall so assert in writing;

     (k)  the registration of the Company as an insurer shall be revoked,
suspended or otherwise have restrictions or conditions placed upon it unless, in

                                       30
<PAGE>
 
the case of the placing of any such restrictions or conditions, such
restrictions or conditions could not have a material adverse effect on the
interests of the Issuing Bank or the Administrative Agent or the Banks under the
Financing Documents;

     (l)  the Company shall fail to deliver Collateral at the times, in the
amounts or as otherwise specified in the Financing Documents or the Lien created
pursuant thereto on the Collateral shall at any time or for any reason cease to
be a valid, enforceable or first priority Lien on any of the Collateral; or

     (m)  the Company shall terminate, amend or waive, or utilize or rely on any
waiver of, any provision of the Custodian Agreement or the Notice of Pledge
without the written consent of the Administrative Agent and the Required Banks;
then, and in every such event, the Administrative Agent may, and in the case of
clauses (i), (ii) and (iv) below shall if requested by Banks having more than
50% of the aggregate amount of Letter of Credit Liabilities, (i) by notice to
the Company terminate the Letter of Credit Commitment and it shall thereupon
terminate, (ii) by notice to the Company declare, to the extent permitted by
law, the Letter of Credit Liabilities to be and the same shall thereupon become
immediately due and payable without presentment, demand, protest or other notice
of any kind, all of which are hereby waived by the Company, (iii) take all other
actions at law or in equity permitted to be taken by it and (iv) by notice to
the Company, require that the Company specifically perform, and the Company
shall specifically perform, its obligations to deliver Collateral under the
Pledge Agreement and its other obligations under the Financing Documents.

     SECTION 6.02.  Notice of Default.  The Administrative Agent shall give
notice to the Company under Section 6.01(c) promptly upon being requested to do
so by any Bank and shall thereupon notify all the Banks thereof.

                                   ARTICLE 7
                                  THE AGENTS

     SECTION 7.01.  Appointment and Authorization.  Each Bank irrevocably
appoints and authorizes the Administrative Agent to take such action as
Administrative Agent on its behalf and to exercise such powers under this
Agreement and the other Financing Documents as are delegated to the
Administrative Agent by the terms hereof and thereof, together with all such
powers as are reasonably incidental thereto.

                                       31
<PAGE>
 
     SECTION 7.02.  Administrative Agent and Affiliates.  Morgan Guaranty Trust
Company of New York shall have the same rights and powers under this Agreement
and each other Financing Document as any other Bank and may exercise or refrain
from exercising the same as though it were not the Administrative Agent, and
Morgan Guaranty Trust Company of New York and its affiliates may accept deposits
from, lend money to, and generally engage in any kind of business with the
Company or any affiliate of the Company as if it were not the Administrative
Agent hereunder or thereunder.

     SECTION 7.03.  Action by Administrative Agent. The obligations of the
Administrative Agent under this Agreement and each other Financing Document are
only those expressly set forth herein or therein. Without limiting the
generality of the foregoing, the Administrative Agent shall not be required to
take any action with respect to any Event of Default, except as expressly
provided in Article VI.

     SECTION 7.04.  Consultation with Experts. The Administrative Agent may
consult with legal counsel (who may be counsel for the Company or the Custodian
or both), independent public accountants and other experts selected by it and
shall not be liable for any action taken or omitted to be taken by it in good
faith in accordance with the advice of such counsel, accountants or experts.

     SECTION 7.05.  Liability of Administrative Agent.  Neither the
Administrative Agent nor any of its affiliates nor any of their respective
directors, officers, agents or employees shall be liable for any action taken or
not taken by it in connection herewith or with any other Financing Document (i)
with the consent or at the request of the Required Banks (or such different
number of Banks as any provision hereof expressly requires for such consent or
request) or (ii) in the absence of its own gross negligence or willful
misconduct. Neither the Administrative Agent nor any of its affiliates nor any
of their respective directors, officers, agents or employees shall be
responsible for or have any duty to ascertain, inquire into or verify (i) any
statement, warranty or representation made hereunder or under any other
Financing Document or in connection herewith or therewith including, without
limitation, the authenticity or accuracy of any draft, certificate, statement or
other item presented under a Letter of Credit, (ii) the performance or
observance of any of the covenants or agreements of the Company, (iii) the
satisfaction of any condition specified in Article III, except receipt of items
required to be delivered to the Administrative Agent, (iv) the validity,
effectiveness or genuineness of this Agreement or any other Financing Document
or any other instrument or other writing furnished in connection herewith or
therewith or (v) the existence, validity, enforceability or priority of the Lien
on the Collateral. The Administrative Agent shall not incur any liability by
acting in reliance upon any notice, consent, certificate, statement, or other
writing

                                       32
<PAGE>
 
(which may be a bank wire, telex, facsimile transmission or similar writing)
believed by it to be genuine or to be signed by the proper party or parties.

     SECTION  7.06.  Indemnification.  (a) Each Bank shall, ratably in
accordance with its Participation Percentage, indemnify the Administrative
Agent, its affiliates and their respective directors, officers, agents and
employees (to the extent not reimbursed by the Company) against any cost,
expense (including counsel fees and disbursements), claim, demand, action, loss
or liability (except such as result from any indemnitee's gross negligence or
willful misconduct) that such indemnitees may suffer or incur in such capacity
in connection with this Agreement or any other Financing Document or any action
taken or omitted by such indemnitees hereunder or thereunder.

     (b)  Without limiting the generality of the foregoing, each Bank shall,
ratably and in accordance with its Participation Percentage, indemnify the
Issuing Bank and its directors, officers, agents and employees (to the extent
not reimbursed by the Company) against any costs, expense (including counsel
fees and disbursements), claim, demand, action, loss or liability that each such
indemnitee may suffer or incur and which results from any failure on the part of
such Bank to pay to the Issuing Bank such Bank's ratable share of any drawing
under any Letter of Credit in accordance with Section 2.03(b).

     SECTION 7.07.  Credit Decision.  Each Bank acknowledges that it has,
independently and without reliance upon any Agent or any other Bank, and based
on such documents and information as it has deemed appropriate, made its own
credit analysis and decision to enter into this Agreement. Each Bank also
acknowledges that it will, independently and without reliance upon any Agent or
any other Bank, and based on such documents and information as it shall deem
appropriate at the time, continue to make its own credit decisions in taking or
not taking any action under this Agreement.

     SECTION 7.08.  Successor Administrative Agent. The Administrative Agent may
resign at any time by giving notice thereof to the Banks and the Company. Upon
any such resignation, the Required Banks shall have the right to appoint a
successor Administrative Agent, which successor Administrative Agent shall be
reasonably acceptable to the Company. If no successor Administrative Agent shall
have been so appointed by the Required Banks, and shall have accepted such
appointment, within 30 days after the retiring Administrative Agent gives notice
of resignation, then the retiring Administrative Agent may, on behalf of the
Banks, appoint a successor Administrative Agent, which shall be a commercial
bank organized or licensed under the laws of the United States of America or of
any State thereof and having a combined capital and surplus of at least
$100,000,000. Upon the acceptance of its appointment as Administrative Agent
hereunder by a successor Administrative Agent, such successor Administrative

                                       33
<PAGE>
 
Agent shall thereupon succeed to and become vested with all the rights and
duties of the retiring Administrative Agent, and the retiring Administrative
Agent shall be discharged from its duties and obligations hereunder. After any
retiring Administrative Agent's resignation hereunder as Administrative Agent,
the provisions of this Article shall inure to its benefit as to any actions
taken or omitted to be taken by it while it was Administrative Agent.

     SECTION 7.09.  Administrative Agent's Fee. The Company shall pay to the
Administrative Agent for its own account fees in the amounts and at the times
previously agreed upon between the Company and the Administrative Agent.

     SECTION 7.10.  Other Agents.  Nothing contained in this Agreement shall be
construed to impose any obligation or duty whatsoever on either Syndication
Agent, on the Documentation Agent, on the Managing Agent or on any Co-Agent in
its capacity as such an Agent.

                                   ARTICLE 8
                                 MISCELLANEOUS

     SECTION 8.01.  Notices.  All notices, requests and other communications to
any party hereunder shall be in writing (including bank wire, telex, facsimile
transmission or similar writing) and shall be given to such party: (x) in the
case of the Company or the Administrative Agent, at its address, facsimile
number or telex number set forth on the signature pages hereof, (y) in the case
of any Bank, at its address, facsimile number or telex number set forth in its
Administrative Questionnaire or (z) in the case of any party, such other
address, facsimile number or telex number as such party may hereafter specify
for the purpose by notice to the Administrative Agent and the Company. Each such
notice, request or other communication shall be effective (i) if given by telex,
when such telex is transmitted to the telex number referred to in this Section
and the appropriate answerback is received, (ii) if given by facsimile
transmission, when transmitted to the facsimile number referred to in this
Section and confirmation of receipt is received, (iii) if given by mail, 10 days
after such communication is deposited in the mails with first class postage
prepaid, addressed as aforesaid or (iv) if given by any other means, when
delivered at the address specified in this Section; provided that notices to the
Administrative Agent under Article II shall not be effective until received.

     SECTION 8.02.  No Waivers.  No failure or delay by the Administrative Agent
or any Bank in exercising any right, power or privilege under this 

                                       34
<PAGE>
 
Agreement or any other Financing Document shall operate as a waiver thereof nor
shall any single or partial exercise thereof preclude any other or further
exercise thereof or the exercise of any other right, power or privilege. The
rights and remedies provided in this Agreement and the other Financing Documents
shall be cumulative and not exclusive of any rights or remedies provided by law.

     SECTION 8.03.  Expenses; Indemnification.  (a) The Company shall pay (i)
all out-of-pocket expenses of the Administrative Agent, including fees and
disbursements of Davis Polk & Wardwell, special United States counsel for the
Issuing Bank and the Agents and any special Bermuda counsel to the
Administrative Agent or the Custodian, reasonably incurred in connection with
the preparation of this Agreement and the other Financing Documents, any waiver
or consent hereunder or thereunder or any amendment hereof or thereof or any
Default or alleged Default hereunder or thereunder and (ii) if an Event of
Default occurs, all out-of-pocket expenses incurred by the Administrative Agent
and each Bank, including (without duplication) the fees and disbursements of
outside counsel and the allocated cost of inside counsel, in connection with
such Event of Default and collection, bankruptcy, insolvency and other
enforcement proceedings resulting therefrom.

     (b)  The Company agrees to indemnify the Administrative Agent and each Bank
(including the Issuing Bank), their respective affiliates and the respective
directors, officers, agents and employees of the foregoing (each an
"Indemnitee") and hold each Indemnitee harmless from and against any and all
liabilities, losses, damages, costs and expenses of any kind, including, without
limitation, the reasonable fees and disbursements of counsel, which may be
reasonably incurred by such Indemnitee in connection with any investigative,
administrative or judicial proceeding (whether or not such Indemnitee shall be
designated a party thereto) brought or threatened relating to or arising out of
the Financing Documents or any actual or proposed use of proceeds of any draft
drawn under any Letter of Credit; provided that no Indemnitee shall have the
right to be indemnified hereunder for such Indemnitee's own gross negligence or
willful misconduct as determined by a court of competent jurisdiction.

     SECTION 8.04. Sharing; Set-offs. (a) Each Bank agrees that if it shall,
by exercising any right of set-off or counterclaim or otherwise, receive payment
of a proportion of the aggregate amount of any Reimbursement Obligation owing to
it which is greater than the proportion received by any other Bank in respect of
the amount of any Reimbursement Obligation owing to such other Bank, the Bank
receiving such proportionately greater payment shall purchase such
participations in the Reimbursement Obligations owing to the other Banks, and
such other adjustments shall be made, as may be required so that all such
payments with respect to such Reimbursement Obligation owing to the Banks shall
be shared by

                                       35
<PAGE>
 
the Banks pro rata; provided that nothing in this Section shall impair the right
of any Bank to exercise any right of set-off or counterclaim it may have and to
apply the amount subject to such exercise to the payment of indebtedness of the
Company other than its indebtedness hereunder. The Company agrees, to the
fullest extent it may effectively do so under applicable law, that any holder of
a participation in a Reimbursement Obligation, whether or not acquired pursuant
to the foregoing arrangements or the arrangements set forth in Section 2.02(a)
or otherwise, may exercise rights of set-off or counterclaim and other rights
with respect to such participation as fully as if such holder of a participation
were a direct creditor of the Company in the amount of such participation.

     (b)  Upon (i) the occurrence and during the continuance of any Event of
Default and (ii) the making of the request specified by Section 6.01 to the
Administrative Agent to exercise remedies pursuant to the provisions of Section
6.01, each Bank and each of its affiliates is hereby authorized at any time and
from time to time, to the fullest extent permitted by law, to set off and
otherwise apply any and all deposits (general or special, time or demand,
provisional or final) at any time held and other indebtedness at any time owing
by such Bank or such affiliate to or for the credit or the account of the
Company against any and all of the obligations of the Company to such Bank now
or hereafter existing under the Financing Documents, irrespective of whether
such Bank shall have made any demand for payment thereof and although such
obligations may be unmatured. Each Bank agrees promptly to notify the Company,
after any such setoff and application; provided, however, that the failure to
give notice shall not affect the validity of such setoff and application. The
rights of each Bank and its affiliates under this Section are in addition to
other rights and remedies (including, without limitation, other rights of
setoff) that such Bank and its affiliates may have.

     SECTION 8.05.  Amendments and Waivers.  Any provision of this Agreement or
the Letters of Credit or any provision of the other Financing Documents
requiring the consent of the Administrative Agent and the Required Banks may be
amended or waived if, but only if, such amendment or waiver is in writing and is
signed by the Company and the Required Banks (and (x) if the rights or duties of
the Administrative Agent are affected thereby, by the Administrative Agent and
(y) if any Letter of Credit is being amended or waived, by the beneficiary
thereof); provided that no such amendment or waiver shall, unless signed by all
the Banks, (i) increase or decrease the Letter of Credit Commitment or subject
any Bank to any additional obligation, (ii) reduce the amount of any
Reimbursement Obligation or the default rate of interest payable thereon or the
amount of any fees or other amounts payable hereunder, (iii) postpone the date
fixed for any payment of any Reimbursement Obligation or of any interest or fees
or other amounts payable hereunder or postpone the Termination Date of any
Letter of Credit, (iv) release any Collateral furnished

                                       36
<PAGE>
 
pursuant to the Pledge Agreement or otherwise, except as contemplated by the
other Financing Documents, (v) change the definition of Eligible Securities or
Minimum Collateral Amount specified in the Pledge Agreement, (vi) change the
Participation Percentage, or the percentage of the aggregate unpaid principal
amount of the Letter of Credit Liabilities, or the number of Banks, which shall
be required for the Banks or any of them to take any action under this Section
or any other provision of this Agreement or any other Financing Document or
(vii) amend this Section 8.05.

     SECTION 8.06.  Successors and Assigns.  (a) The provisions of this
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors and assigns, except that the Company may not
assign or otherwise transfer any of its rights under this Agreement without the
prior written consent of all Banks.

     (b)  Any Bank may at any time grant to one or more banks or other
institutions (each a "SUBPARTICIPANT") subparticipating interests in its rights
and obligations under this Agreement. In the event of any such grant by a Bank
of a subparticipating interest to a Subparticipant, whether or not upon notice
to the Company and the Administrative Agent, such Bank shall remain responsible
for the performance of its obligations hereunder, and the Company and the
Administrative Agent shall continue to deal solely and directly with such Bank
in connection with such Bank's rights and obligations under this Agreement. Any
agreement pursuant to which any Bank may grant such a subparticipating interest
shall provide that such Bank shall retain the sole right and responsibility to
enforce the obligations of the Company hereunder including, without limitation,
the right to approve any amendment, modification or waiver of any provision of
this Agreement; provided that such subparticipation agreement may provide that
such Bank will not agree to any modification, amendment or waiver of this
Agreement described in clause (i), (ii), (iii), (iv) or (v) of Section 8.05
without the consent of the Subparticipant. The Company agrees that each
Subparticipant shall, to the extent provided in its subparticipation agreement
and subject to subsection (e) below, be entitled to the benefits of Section 2.07
with respect to its subparticipating interest. An assignment or other transfer
which is not permitted by subsection (c) or (d) below shall be given effect for
purposes of this Agreement only to the extent of a subparticipating interest
granted in accordance with this subsection (b).

     (c)  Any Bank may at any time assign to one or more banks or other
institutions (each an "Assignee") all, or a proportionate part (equivalent to an
initial participation in the Related Documents of not less than $15,000,000,
unless the Company shall otherwise consent or the assignment is for all of the
rights and obligations of the transferor Bank) of all, of its rights and
obligations under

                                       37
<PAGE>
 
Agreement and the other Financing Documents, and such Assignee shall assume such
rights and obligations, pursuant to an Assignment and Assumption Agreement in
substantially the form of Exhibit J hereto executed by such Assignee and such
transferee Bank, with (and subject to) the subscribed consent of the Company,
which shall not be unreasonably withheld, and the Issuing Bank, which may
consent or not in its sole discretion; provided that if an Assignee is an
affiliate of such transferor Bank or was a Bank immediately prior to such
assignment, no such consent of the Company shall be required; and provided
further that, unless the Company shall otherwise consent or the assignment is
for all of the rights and obligations of the transferor Bank, the participation
in the Related Documents of such transferor Bank after giving effect to such
assignment (together with the participations of its affiliates) shall not be
less than $15,000,000; and provided further that such assignment shall be
accompanied by a ratably equivalent assignment of the rights and obligations of
the transferor Bank (and its affiliates) under each of the other Related
Documents. Upon the consummation of any assignment pursuant to this subsection
(c) and payment by such Assignee to such transferor Bank of an amount equal to
the purchase price agreed between such transferor Bank and such Assignee, such
Assignee shall be a Bank party to this Agreement and shall have all the rights
and obligations of a Bank as set forth in any instrument of assumption, and the
transferor Bank shall be released from its obligations hereunder to a
corresponding extent, and no further consent or action by any party shall be
required. In connection with any such assignment, the transferor Bank shall pay
to the Administrative Agent an administrative fee for processing such assignment
in the amount of $2,500.

          (d) Any Bank may at any time assign all or any portion of its rights
under this Agreement and the other Financing Documents to a Federal Reserve
Bank. No such assignment shall release the transferor Bank from its obligations
hereunder.

          (e)  No Assignee, Participant or other transferee of any Bank's rights
shall be entitled to receive any greater payment under Sections 2.07 and 8.13
than such Bank would have been entitled to receive with respect to the rights
transferred, unless such transfer is made with the Company's prior written
consent or at a time when the circumstances giving rise to such greater payment
did not exist.

          SECTION 8.07. Collateral. Each of the Banks represents to the
Administrative Agent and each of the other Banks that it in good faith is not
relying upon any "margin stock" (as defined in Regulation U) as collateral in
the extension or maintenance of the credit provided for in this Agreement.

                                       38
<PAGE>
 
          SECTION 8.08. Governing Law.  This Agreement shall be governed by and
construed in accordance with the laws of the State of New York.

          SECTION 8.09. Counterparts; Integration. This Agreement may be signed
in any number of counterparts, each of which shall be an original, with the same
effect as if the signatures thereto and hereto were upon the same instrument.
This Agreement, together with the other Financing Documents, constitutes the
entire agreement and understanding among the parties hereto and supersedes any
and all prior agreements and understandings, oral or written, relating to the
subject matter hereof.

          SECTION 8.10. Judicial Proceedings. (a) Consent to Jurisdiction. The
Company irrevocably submits to the jurisdiction of any federal court sitting in
New York City, and in the event that jurisdiction cannot be obtained or
maintained in a federal court, to the jurisdiction of any New York State court
sitting in New York City over any suit, action or proceeding arising out of or
relating to this Agreement or any other Financing Document. The Company
irrevocably waives, to the fullest extent permitted by law, any objection which
it may now or hereafter have to the laying of the venue of any such suit, action
or proceeding brought in such court and any claim that any suit, action or
proceeding brought in such a court has been brought in an inconvenient forum.
The Company agrees that a final judgment in any such suit, action or proceeding
brought in such a court shall be conclusive and binding upon it and will be
given effect in Bermuda to the fullest extent permitted by applicable law and
may be enforced in any federal or New York State court sitting in New York City
(or any other court to the jurisdiction of which the Company is or may be
subject) by a suit upon such judgment, provided that service of process is
effected upon it in one of the manners specified herein or as otherwise
permitted by law.

          (b) Appointment of Agent for Service of Process. The Company hereby
irrevocably designates and appoints CT Corporation System having an office on
the date hereof at 1633 Broadway, New York, New York 10019 as its authorized
agent, to accept and acknowledge on its behalf, service of any and all process
which may be served in any suit, action or proceeding of the nature referred to
in subsection (a) above in any federal or New York State court sitting in New
York City. The Company represents and warrants that such agent has agreed in
writing to accept such appointment and that a true copy of such designation and
acceptance has been delivered to the Administrative Agent. Said designation and
appointment shall be irrevocable until each Reimbursement Obligation and each
other amount payable hereunder shall have been paid in full in accordance with
the provisions hereof. If such agent shall cease so to act, the Company
covenants and agrees to designate irrevocably and appoint without delay another
such agent satisfactory to the Administrative Agent and to deliver promptly to
the

                                       39
<PAGE>
 
Administrative Agent evidence in writing of such other agent's acceptance of
such appointment.

          (c) Service of Process.  The Company hereby  consents to process being
served in any suit, action or proceeding of the nature referred to in subsection
(a) above in any  federal  or New York State  court  sitting in New York City by
service  of  process  upon the  agent of the  Company  for  service  of  process
appointed as provided in  subsection  (b) above;  provided  that,  to the extent
lawful and  possible,  notice of said service upon such agent shall be mailed by
registered or certified air mail, postage prepaid,  return receipt requested, to
the  Company at its address  specified  on the  signature  page hereof or to any
other  address  of which the  Company  shall have  given  written  notice to the
Administrative  Agent.  The Company  irrevocably  waives,  to the fullest extent
permitted  by law,  all  claims of error by reason of any such  service  in such
manner and agrees that such service shall be deemed in every  respect  effective
service of process upon the Company in any such suit,  action or proceeding  and
shall, to the fullest extent permitted by law, be taken and held to be valid and
personal service upon and personal delivery to the Company.

          (d) No  Limitation  on Service or Suit.  Nothing in this  Section 8.10
shall affect the right of the Administrative  Agent or any Bank to serve process
in any other manner  permitted  by law or limit the right of the  Administrative
Agent or any Bank to bring proceedings  against the Company in the courts of any
jurisdiction or jurisdictions.

          SECTION 8.11. Judgment Currency. If, under any applicable law and
whether pursuant to a judgment being made or registered against the Company or
for any other reason, any payment under or in connection with this Agreement or
any other Financing Document is made or satisfied in a currency (the "Other
Currency") other than that in which the relevant payment is due (the "Required
Currency"), then, to the extent that the payment (when converted into the
Required Currency at the rate of exchange on the date of payment or, if it is
not practicable for the party entitled thereto (the "Payee") to purchase the
Required Currency with the Other Currency on the date of payment, at the rate of
exchange as soon thereafter as it is practicable for it to do so) actually
received by the Payee falls short of the amount due under the terms of this
Agreement, the Company shall, to the extent permitted by law, as a separate and
independent obligation, indemnify and hold harmless the Payee against the amount
of such short-fall. For the purpose of this Section, "rate of exchange" means
the rate at which the Payee is able on the relevant date to purchase the
Required Currency with the Other Currency and shall take into account any
premium and other costs of exchange.

                                       40
<PAGE>
 
          SECTION 8.12. WAIVER OF JURY TRIAL. THE COMPANY, THE ADMINISTRATIVE
AGENT AND THE BANKS HEREBY IRREVOCABLY WAIVE ANY AND ALL RIGHT TO TRIAL BY JURY
IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT, THE OTHER
FINANCING DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

          SECTION 8.13. Taxes. (a) For purposes of this Section 8.13, the
following terms have the following meanings:

          "TAXES" means any and all present or future taxes, duties, levies,
imposts, deductions, charges or withholdings of any nature with respect to any
payment by the Company pursuant to this Agreement or under any Financing
Documents, and all liabilities with respect thereto, excluding in the case of
each Bank and the Administrative Agent, taxes imposed on its net income, and
franchise or similar taxes imposed on it, by a jurisdiction under the laws of
which such Bank or the Administrative Agent (as the case may be) is organized or
in which its principal executive office is located (all such excluded taxes
being hereinafter referred to as "DOMESTIC TAXES").

          "OTHER TAXES" means any present or future stamp or documentary taxes
and any other excise or property taxes, or similar charges or levies, which
arise from any payment made pursuant to this Agreement or under any Financing
Documents or from the execution, delivery, registration or enforcement of, or
otherwise with respect to, this Agreement or any Financing Documents.

          (b) Any and all payments by the Company to or for the account of any
Bank or the Administrative Agent hereunder or under any Financing Documents
shall be made without deduction for any Taxes or Other Taxes; provided that, if
the Company shall be required by law to deduct any Taxes or Other Taxes from any
such payments, (i) the sum payable shall be increased as necessary so that after
making all required deductions and withholdings (including deductions or
withholdings applicable to additional sums payable under this Section 8.13) such
Bank or the Administrative Agent (as the case may be) receives an amount equal
to the sum it would have received had no such deductions been made, (ii) the
Company shall make such deductions or withholdings, (iii) the Company shall pay
the full amount deducted or withheld to the relevant taxation authority or other
authority in accordance with applicable law and (iv) the Company shall furnish
to the Administrative Agent, at its address referred to in Section 8.01, the
original or a certified copy of a receipt evidencing payment thereof.

          (c) The Company agrees to indemnify each Bank and the Administrative
Agent for the full amount of Taxes or Other Taxes (including, without
limitation,
                                       41
<PAGE>
 
any Taxes or Other Taxes imposed or asserted by any jurisdiction on amounts
payable under this Section 8.13), whether or not legally or correctly imposed,
paid by such Bank or the Administrative Agent (as the case may be) in good faith
and any liability (including penalties, interest and expenses) arising therefrom
or with respect thereto. In addition, the Company agrees to indemnify each Bank
and the Administrative Agent for all Domestic Taxes (calculated based on a
hypothetical basis at the maximum marginal rate for a corporation) and any
liability (including penalties, interest and expenses) arising therefrom or with
respect thereto to the extent such Domestic Taxes result from the payment of or
indemnification for Taxes, Other Taxes or Domestic Taxes pursuant to this
Section 8.13. This indemnification shall be paid within 15 days after such Bank
or the Administrative Agent (as the case may be) makes demand therefor.

          (d) Each Bank and the  Administrative  Agent shall,  at the request of
the Company,  use  reasonable  efforts  (consistent  with  applicable  legal and
regulatory  restrictions)  to file any certificate or document  requested by the
Company  if the making of such a filing  would  avoid the need for or reduce the
amounts payable to or for the account of such Bank or the  Administrative  Agent
(as the case may be) pursuant to this Section 8.13 which may  thereafter  accrue
and would not, in the sole  judgment of such Bank or the  Administrative  Agent,
require such Bank or the  Administrative  Agent to disclose any  confidential or
proprietary  information  or be  otherwise  disadvantageous  to such Bank or the
Administrative Agent.

          (e) Notwithstanding the foregoing,  nothing in this Section 8.13 shall
interfere with the rights of any Bank or the  Administrative  Agent, as the case
may be, to conduct its fiscal or tax affairs in such manner as it deems fit.

          SECTION 8.14. Confidential Information. The Administrative Agent and
each Bank agrees to keep any information delivered or made available by the
Company pursuant to this Agreement confidential from anyone other than persons
employed or retained by such Bank and its affiliates who are engaged in
evaluating, approving, structuring or administering the credit facility
contemplated hereby; provided that nothing herein shall prevent any Bank from
disclosing such information (a) to any other Bank or the Administrative Agent,
(b) subject to provisions substantially similar to those contained in this
Section 8.14, to any other Person if reasonably incidental to the administration
of the credit facility contemplated hereby, (c) upon the order of any court or
administrative agency, (d) upon the request or demand of any regulatory agency
or authority, (e) which had been publicly disclosed other than as a result of a
disclosure by the Administrative Agent or any Bank prohibited by this Agreement,
(f) in connection with any litigation relating to the Related Documents to which
the Administrative Agent, any Bank or its subsidiaries or Parent may be a party,
(g) to the extent necessary in connection with the exercise of any remedy
hereunder, (h) to such Bank's or Administrative Agent's legal counsel and
independent auditors and (i) subject to

                                       42
<PAGE>
 
provisions substantially similar to those contained in this Section 8.14, to any
actual or proposed Participant or Assignee. Notwithstanding the foregoing, this
Section 8.14 shall not apply to information that is or becomes publicly
available, information that was available to a Bank on a non-confidential basis
prior to its disclosure hereunder and information which becomes available to a
Bank on a non-confidential basis from a source that is not, to such Bank's
knowledge, subject to a confidentiality agreement with the Company.

     SECTION 8.15.  References in Other Financing Documents. The parties hereto,
comprising all parties to each of the other Financing Documents, agree that from
and after the Restatement Date, all references in the other Financing Documents
to the Original Agreement shall be deemed to refer to this Amended Agreement, as
the same may be further amended from time to time in accordance with the
provisions hereof and thereof, and all references therein to the Financing
Documents (or any of them) shall be to the Financing Documents as defined
herein.

     SECTION 8.16.  Amendment to Pledge Agreement. The parties hereto,
comprising all parties to the Pledge Agreement, agree that the Pledge Agreement
is amended by deleting Section 21 thereof.

     SECTION 8.17.  Substitution of Bank. If any Bank has demanded compensation
under Section 2.07 or 8.13, the Borrower shall have the right, with the
assistance of the Administrative Agent, to designate a substitute bank or banks
(which may be one or more of the Banks) mutually satisfactory to the Borrower,
the Administrative Agent (whose consent shall not be unreasonably withheld) and
the issuing banks under the Related Documents to purchase for cash, pursuant to
an Assignment and Assumption Agreement in substantially the form of Exhibit I
hereto, the outstanding loans of such Bank and assume the commitment and letter
of credit liabilities of such Bank (and its affiliates) under each of the
Related Documents, without recourse to or warranty by, or expense to, such Bank,
for a purchase price equal to the principal amount of all of such Bank's
outstanding loans and funded letter of credit liabilities plus any accrued but
unpaid interest thereon and the accrued but unpaid fees in respect of such
Bank's commitments and letter of credit liabilities plus such amount, if any, as
would be payable pursuant to the funding loss indemnities in the Related
Documents if the outstanding loans of such Bank were prepaid in their entirety
on the date of consummation of such assignment.

     SECTION 8.18.  Amendment to Custodian Agreement. The parties hereto,
comprising all parties to the Custodian Agreement, agree that Section 27 of the
Custodian Agreement is amended to read in its entirety as follows:

          This Agreement shall be governed by and construed in accordance with
     the laws of Bermuda and each of the parties hereto submit to the non-
     exclusive jurisdiction of the Bermuda courts;

                                      43
<PAGE>
 
          provided that matters relating to the perfection of a
          security interest in the Pledge Account and any assets 
          held therein, the effect of perfection or non-perfection 
          of such a security interest and the priority of such a 
          security interest shall be governed by the substantive 
          laws of the State of New York (not including conflict-of
          -law rules).

                                      44
<PAGE>
 
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed by their respective authorized officers as of the day and year first
above written.

                                            A.C.E. INSURANCE COMPANY, LTD.


                                            By____________________________
                                               Title:
                                            The ACE Building
                                            30 Woodbourne Avenue
                                            Hamilton HM 08, Bermuda
                                            Telex number: 3543ACEILBA
                                            Facsimile number: (441) 295-5221

The Common Seal of A.C.E.
Insurance Company, Ltd. was
hereunto affixed in the presence
of:

Director

_______________________________

Director/Secretary

_______________________________

                                      45
<PAGE>
 
                                            MORGAN GUARANTY TRUST
                                              COMPANY OF NEW YORK


                                            By_________________________
                                              Title:


                                            MELLON BANK, N.A.


                                            By_________________________
                                              Title:


                                            Managing Agent

                                            CITIBANK, N.A.


                                            By_________________________
                                              Title:


                                            Co-Agents

                                            THE BANK OF NEW YORK


                                            By_________________________
                                              Title:


                                            THE BANK OF TOKYO-MITSUBISHI,
                                               LTD.

                                            By_________________________
                                              Title:


                                            BARCLAYS BANK PLC


                                            By_________________________
                                              Title:

                                       46
<PAGE>
 
                                            DEUTSCHE BANK AG, NEW YORK
                                                  AND/OR CAYMAN ISLANDS
                                                  BRANCH


                                            By_________________________
                                                 Title:


                                            By_________________________
                                                 Title:


                                            FLEET NATIONAL BANK


                                            By_________________________
                                                 Title:


                                            ING BANK, N.V.


                                            By_________________________
                                                 Title:


                                            By_________________________
                                                 Title:


                                            ROYAL BANK OF CANADA


                                            By_________________________
                                                 Title:


                                            Other Banks

                                            THE BANK OF BERMUDA, LTD.


                                            By_________________________
                                                 Title:

                                       47
<PAGE>
 
                                            BANQUE NATIONALE DE PARIS


                                            By_________________________________
                                                 Title:


                                            By:________________________________
                                                  Title:


                                            THE CHASE MANHATTAN BANK


                                            By_________________________________
                                                 Title:


                                            CREDIT LYONNAIS NEW YORK
                                                  BRANCH


                                            By_________________________________
                                                 Title:


                                            DRESDNER BANK A.G., NEW YORK
                                               BRANCH AND CAYMAN ISLANDS
                                               BRANCH


                                            By_________________________________
                                                 Title:


                                            By:________________________________
                                                  Title:


                                            THE FIRST NATIONAL BANK OF
                                                  CHICAGO


                                            By_________________________________
                                                 Title:

                                       48
<PAGE>
 
                                            STATE STREET BANK AND TRUST
                                                 COMPANY


                                            By_________________________________
                                                 Title:

                                       49
<PAGE>
 
                                            MORGAN GUARANTY TRUST
                                               COMPANY OF NEW YORK, as
                                               Issuing Bank and Administrative
                                               Agent


                                            By_________________________________
                                              Title
                                            60 Wall Street
                                            New York, New York 10260-0060
                                            Attention: Glenda Irving
                                            Telex number: 177615
                                            Facsimile number: 212-648-5249

                                       50
<PAGE>
 
                                                                   SCHEDULE I

                            PARTICIPATION OF BANKS


Banks                                                            Participation %
- -----                                                            ---------------
Morgan Guaranty Trust Company of New York                        .096153846 
                                                                             
Mellon Bank, N.A.                                                .096153846 
                                                                             
Managing Agent                                                               
                                                                             
Citibank, N.A.                                                   .080769231 
                                                                             
Co-Agents                                                                    
                                                                             
The Bank of New York                                             .073076923 
                                                                             
The Bank of Tokyo-Mitsubishi, Ltd.                               .073076923 
                                                                             
Barclays Bank PLC                                                .073076923 
                                                                             
Deutsche Bank AG, New York and/or                                            
    Cayman Islands Branch                                        .073076923 
                                                                             
Fleet National Bank                                              .073076923 
                                                                             
ING Bank, N.V.                                                   .073076923 
                                                                             
Royal Bank of Canada                                             .073076923 
                                                                             
Other Banks                                                                  
                                                                             
The Bank of Bermuda, Ltd.                                        .030769231 
                                                                             
Banque Nationale de Paris                                        .030769231 
                                                                             
The Chase Manhattan Bank                                         .030769231 
                                                                             
Credit Lyonnais New York Branch                                  .030769231 
                                                                             
Dresdner Bank A.G., New York and                                             
    Cayman Islands Branch                                        .030769231 
                                                                             
The First National Bank of Chicago                               .030769231 
                                                                             
State Street Bank and Trust Company                              .030769231 
                                                                 ---------- 
                                                                     100% 
                                                                 ----------

                                       51
<PAGE>
 
                                                                       EXHIBIT A

                                        LETTERS OF CREDIT

<TABLE> 
<CAPTION> 
- ------------------------------------------------------------------------------------------------------------------------------------

     Amount                   Termination Date                    Beneficiary                              Applicant
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                          <C>                          <C>                                        <C>  
  (pound)70,300,000
                             31 December 2002             Society and Council of Lloyd's               ACE Capital Limited
 (pound)149,300,000*                                      c/o Corporate Membership Unit
- ------------------------------------------------------------------------------------------------------------------------------------

     (pound)371,875
                             31 December 2002             Society and Council of Lloyd's             ACE Staff Corporate Member
     (pound)522,250*                                      c/o Corporate Membership Unit                      Limited

- ------------------------------------------------------------------------------------------------------------------------------------

     (pound)455,000**        31 December 2002             Society and Council of Lloyd's              ACE Capital II Limited

- ------------------------------------------------------------------------------------------------------------------------------------

   (pound)3,406,216          31 December 2002                  Council of Lloyd's                     ZIC Lloyd's Underwriting
                                                                                                             Limited
- ------------------------------------------------------------------------------------------------------------------------------------

</TABLE> 

       *   Increased amount effective January 1, 1998.
       **  Letter of Credit effective January 1, 1998.

                                       52
<PAGE>
 
                                                                       EXHIBIT E

                   FORM OF OPINION OF DAVIS POLK & WARDWELL



                                                           December 11, 1997


To the Banks and the Agent
Referred to Below
c/o Morgan Guaranty Trust Company
of New York, as Administrative Agent
60 Wall Street
New York, New York  10260-0060

Ladies and Gentlemen:

          We have participated in the preparation of (i) the Amended and
Restated Reimbursement Agreement (the "Reimbursement Agreement") dated as of
December 11, 1997 among A.C.E. Insurance Company, Ltd., a Bermuda limited
liability company (the "Company"), the Banks listed on the signature pages
thereof (the "Banks") and Morgan Guaranty Trust Company of New York, as Issuing
Bank and as Administrative Agent (the "Administrative Agent") and (ii) the
Pledge Agreement (the "Pledge Agreement") dated as of November 22, 1996 between
the Company and the Administrative Agent, and have acted as special United
States counsel for the Administrative Agent for the purpose of rendering this
opinion pursuant to Section 3.01(f) of the Reimbursement Agreement. Terms
defined in the Reimbursement Agreement are used herein as therein defined.

          We have examined originals or copies, certified or otherwise
identified to our satisfaction, of such documents, corporate records,
certificates of public officials and other instruments and have conducted such
other investigations of fact and law as we have deemed necessary or advisable
for purposes of this opinion.

          Upon the basis of the foregoing and subject to the qualifications set
forth below, we are of the opinion that:

                                       53
<PAGE>
 
          1.   The execution,  delivery and  performance by the Company of
the  Reimbursement  Agreement and the Pledge  Agreement are within the Company's
corporate  powers  and have  been duly  authorized  by all  necessary  corporate
action.

          2.   The Reimbursement Agreement and the Pledge Agreement constitute
valid and binding agreements of the Company, in each case enforceable in
accordance with its terms, except as the same may be limited by bankruptcy,
insolvency or similar laws affecting creditors' rights generally and by general
principles of equity.

          The foregoing opinion is qualified to the extent that certain of the
remedies provided in the Reimbursement Agreement and the Pledge Agreement may be
limited or rendered unenforceable under applicable law and judicial decisions,
but such law and judicial decisions do not, we believe, make the remedies
provided for therein inadequate for the practical realization of the benefits
intended thereby.

          We are members of the Bar of the State of New York and the foregoing
opinion is limited to the laws of the State of New York and the federal laws of
the United States of America. In giving the foregoing opinion we have relied,
with your consent and without independent investigation, as to all matters
governed by the laws of Bermuda, upon the opinion of Conyers, Dill & Pearman,
special legal counsel to the Company, dated the date hereof, a copy of which has
been delivered to you pursuant to Section 3.01(d) of the Reimbursement
Agreement.

          This opinion is rendered solely to you in connection with the above
matter. This opinion may not be relied upon by you for any other purpose or
relied upon by any other Person without our prior written consent.

                                                       Very truly yours,

                                       2

<PAGE>
 
                                                                     EXHIBIT G

                  FORM OF LETTER OF CREDIT EXTENSION REQUEST
                  ------------------------------------------

                                                            ___________, ____


Morgan Guaranty Trust Company
of New York, as Issuing Bank
c/o J. P. Morgan Services Inc.
P.O. Box 6071
Newark, DE  19714-9857
Attention: International Trade Services

Re: Amended and Restated Reimbursement Agreement dated as of December 11,
1997, as amended from time to time (the "Agreement"), among A.C.E. Insurance
Company, Ltd. (the "Company"), the Banks listed therein and Morgan Guaranty
Trust Company of New York, as Administrative Agent and Issuing Bank.

Capitalized  terms used herein that are defined in the Agreement  shall have the
meanings therein defined.

           1.  Pursuant to Section  2.02 of the  Agreement,  ___________________
(the  "Applicant")  hereby  requests  that the  Issuing  Bank extend a Letter of
Credit in accordance with the information annexed hereto as Annex A hereto.

           2. The Company  hereby  certifies  that on the date hereof and on the
date of  extension  set  forth in Annex A, in each case  both  before  and after
giving effect to the extension requested hereby:

              (a)   no Default has occurred and is continuing;

              (b)   each of the representations and warranties of the Company
         contained in the Agreement and each other Financing Document is true on
         the date hereof, except representations and warranties which expressly
         refer to an earlier date in which case the same shall be true on and as
         of such earlier date;

              (c)   after giving effect to the extension requested hereby, the
         aggregate amount of the Letter of Credit Liabilities will not exceed
         the Letter of Credit Commitment; and
<PAGE>
 
               (d)   the Letter of Credit requested hereby is being extended
         solely as security to support the Applicant's underwriting business at
         the Society and Corporation of Lloyd's provided in accordance with the
         requirements of the Society and Corporation of Lloyd's.

         IN WITNESS  WHEREOF,  the Applicant has caused this  Certificate  to be
executed by its duly  authorized  officer as of the date and year first  written
above.


                                            [APPLICANT]


                                            By:___________________________
                                            Name:_________________________
                                            Title:________________________



                                            A.C.E. INSURANCE COMPANY, LTD.


                                            By:_____________________________
                                                 Name:

                                                 Title:

                                       2
<PAGE>
 
                                    Annex A

                         LETTER OF CREDIT INFORMATION


1.       Name of Beneficiary:

________________________________________________________________

2.       Letter of Credit Number:
________________________________________________________________
________________________________________________________________

3.       Maximum amount available under Letter of
Credit:  $___________.

4.       Effective Date of Extension:   January 1, _____.

5.       Extended Termination Date:     December 31, _____.

                                       3

<PAGE>
 
                                                                   EXHIBIT 10.33

                                                                  EXECUTION COPY



                                 $250,000,000


                              TERM LOAN AGREEMENT


                                  dated as of


                               December 11, 1997


                                     among


                            ACE US Holdings, Inc.,
                                 as Borrower,


                                 ACE Limited,
                                 as Guarantor,


                            The Banks Listed Herein


                                      and


                  Morgan Guaranty Trust Company of New York,
                            as Administrative Agent

                                ________________

                          J.P. Morgan Securities Inc.
                                      and
                               Mellon Bank N.A.,
                             Co-Syndication Agents


                  Morgan Guaranty Trust Company of New York,
                              Documentation Agent
                
<PAGE>
 
                               TABLE OF CONTENTS

                                 _____________


<TABLE> 
<CAPTION> 
                                                                                            Page
                                                                                            ----
<S>                                                                                         <C> 
                                   ARTICLE 1
                                  Definitions

Section 1.01.  Definitions.................................................................   1
Section 1.02.  Accounting Terms and Determinations.........................................  12
Section 1.03.  Types of Borrowings.........................................................  13
Section 1.04.  United States Dollars.......................................................  13

                                   ARTICLE 2
                                   The Loans

Section 2.01.  Commitments to Lend.........................................................  13
Section 2.02.  Notice of Borrowing.........................................................  13
Section 2.03.  Notice of Banks; Funding of Loans...........................................  14
Section 2.04.  Notes.......................................................................  14
Section 2.05.  Amortization of Loans.......................................................  15
Section 2.06.  Interest Rates..............................................................  15
Section 2.07.  Fees........................................................................  17
Section 2.08.  Mandatory Termination of Commitments........................................  17
Section 2.09.  Method of Electing Interest Rates...........................................  17
Section 2.10.  Optional Prepayments........................................................  19
Section 2.11.  General Provisions as to Payments...........................................  19
Section 2.12.  Funding Losses..............................................................  20
Section 2.13.  Computation of Interest and Fees............................................  20
Section 2.14.  Regulation D Compensation...................................................  20

                                   ARTICLE 3
                                  Conditions

Section 3.01.  Closing.....................................................................  21
Section 3.02.  Borrowing...................................................................  22


                                   ARTICLE 4
                        Representations and Warranties

Section 4.01.  Corporate Existence and Power...............................................  24
Section 4.02.  Corporate and Governmental Authorization; No
  Contravention............................................................................  24
</TABLE> 
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                                            PAGE
                                                                                            ----
<S>                                                                                         <C> 
Section 4.03.  Binding Effect..............................................................  24
Section 4.04.  Financial Information.......................................................  24
Section 4.05.  Litigation..................................................................  26
Section 4.06.  ERISA.......................................................................  26
Section 4.07.  Taxes.......................................................................  27
Section 4.08.  Not an Investment Company...................................................  27
Section 4.09.  Full Disclosure.............................................................  27
Section 4.10.  Compliance with Laws........................................................  27

                                   ARTICLE 5
                                   Covenants

Section 5.01.  Information.................................................................  28
Section 5.02.  Payment of Obligations......................................................  29
Section 5.03.  Maintenance of Property; Insurance..........................................  30
Section 5.04.  Conduct of Business and Maintenance of Existence............................  30
Section 5.05.  Compliance with Laws........................................................  30
Section 5.06.  Inspection of Property, Book and Records....................................  31
Section 5.07.  Leverage....................................................................  31
Section 5.08.  Debt........................................................................  31
Section 5.09.  Minimum Tangible Net Worth..................................................  32
Section 5.10.  Negative Pledge.............................................................  32
Section 5.11.  Consolidations, Mergers and Sales of Assets.................................  33
Section 5.12.  Use of Proceeds.............................................................  33
Section 5.13.  ERISA.......................................................................  33
Section 5.14.  Restricted Payments.........................................................  34
Section 5.15.  Investments; Acquisitions...................................................  34
Section 5.16.  Transactions with Affiliates................................................  34
Section 5.17.  No Modification of Documents Without Consent................................  34
Section 5.18.  Debt Service Coverage Ratio.................................................  35

                                   ARTICLE 6
                                   Defaults

Section 6.01.  Events of Default...........................................................  35
Section 6.02.  Notice of Default...........................................................  39
</TABLE> 

                                      ii
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                                                  PAGE
                                                                                                  ----
<S>                                                                                               <C> 
                                  ARTICLE 7
                                  The Agents

Section 7.01.  Appointment and Authorization.....................................................  39
Section 7.02.  Administrative Agent and Affiliates...............................................  39
Section 7.03.  Action by Administrative Agent....................................................  39
Section 7.04.  Consultation with Experts.........................................................  39
Section 7.05.  Liability of Administrative Agent.................................................  39
Section 7.06.  Indemnification...................................................................  40
Section 7.07.  Credit Decision...................................................................  40
Section 7.08.  Successor Administrative Agent....................................................  40
Section 7.09.  Administrative Agent's Fee........................................................  41
Section 7.10.  Other Agents......................................................................  41

                                   ARTICLE 8
                            Change in Circumstances

Section 8.01.  Basis for Determination Interest Rate Inadequate or
        Unfair...................................................................................  41
Section 8.02.  Illegality........................................................................  42
Section 8.03.  Increased Cost and Reduced Return.................................................  42
Section 8.04.  Taxes.............................................................................  44
Section 8.05.  Base Rate Loans Substituted for Affected Fixed Rate Loans.........................  46
Section 8.06.  Substitution of Bank..............................................................  47

                                   ARTICLE 9
                                   Guaranty

Section 9.01.  The Guaranty......................................................................  47
Section 9.02.  Guaranty Unconditional............................................................  47
Section 9.03.  Discharge Only upon Payment in Full; Reinstatement in
        Certain Circumstances....................................................................  48
Section 9.04.  Waiver by the Guarantor...........................................................  49
Section 9.05.  Subrogation.......................................................................  49
Section 9.06.  Stay of Acceleration..............................................................  49
</TABLE>

                                      iii
<PAGE>
 
<TABLE> 
<CAPTION> 
                                                                         PAGE
                                                                         ----
<S>                                                                      <C> 
                                  ARTICLE 10
                                 Miscellaneous

Section 10.01.  Notices.................................................  49
Section 10.02.  No Waivers..............................................  50
Section 10.03.  Expenses; Indemnification...............................  50
Section 10.04.  Sharing; Set-Offs.......................................  50
Section 10.05.  Amendments and Waivers..................................  51
Section 10.06.  Successors and Assigns..................................  52
Section 10.07.  Collateral..............................................  53
Section 10.08.  Governing Law...........................................  53
Section 10.09.  Counterparts; Integration; Effectiveness................  54
Section 10.10.  Judicial Proceedings....................................  54
Section 10.11.  Judgment Currency.......................................  55
Section 10.12.  WAIVER OF JURY TRIAL....................................  56
Section 10.13.  Confidentiality.........................................  56
</TABLE> 
 
 
EXHIBIT A   -   NOTE  
EXHIBIT B   -   FORM OF PLEDGE AGREEMENT
EXHIBIT C   -   FORM OF SUBORDINATED LOAN AGREEMENT 
EXHIBIT D   -   FORM OF MAPLES AND CALDER OPINION      
EXHIBIT E   -   FORM OF CONYERS, DILL & PEARMAN OPINION
EXHIBIT F   -   FORM OF MAYER, BROWN & PLATT OPINION 
EXHIBIT G   -   FORM OF DAVIS POLK & WARDWELL OPINION
EXHIBIT H   -   ASSIGNMENT AND ASSUMPTION AGREEMENT    
EXHIBIT I   -   LETTER FROM CT CORPORATION SYSTEM 

                                      iv
<PAGE>
 
                              TERM LOAN AGREEMENT


     AGREEMENT dated as of December 11, 1997 among ACE US HOLDINGS, INC., ACE
LIMITED, the BANKS listed on the signature pages hereof and MORGAN GUARANTY
TRUST COMPANY OF NEW YORK, as Administrative Agent.

     The parties hereto agree as follows:



                                   ARTICLE 1
                                  Definitions

     Section 1.01.  Definitions.  The following terms, as used herein, have the
following meanings:

     "ACE INSURANCE" means A.C.E. Insurance Company, Ltd., a Bermuda limited
liability company, and its successors.

     "ACQUISITION" means an acquisition by the Borrower or any of its
Subsidiaries of a company, a division, a location or a line of business or of
all or substantially all of the assets of any of the foregoing.

     "ADMINISTRATIVE AGENT" means Morgan Guaranty Trust Company of New York in
its capacity as administrative agent for the Banks under the Financing
Documents, and its successors in such capacity.

     "AFFILIATE" means (i) any Person that directly, or indirectly through one
or more intermediaries, controls the Borrower (a "CONTROLLING PERSON") or (ii)
any Person (other than the Borrower or a Subsidiary of the Borrower) which is
controlled by or is under common control with a Controlling Person; provided
that no Relevant Party shall be an Affiliate for purposes hereof. As used
herein, the term "CONTROL" means possession, directly or indirectly, of the
power to direct or cause the direction of the management or policies of a
Person, whether though the ownership of voting securities, by contract or
otherwise.

     "AGENT" means each of the Administrative Agent, the Documentation Agent,
the Syndication Agents, the Managing Agent and the Co-Agents, and "AGENTS" means
any combination of them, as the context may require.
<PAGE>
 
     "ADMINISTRATIVE QUESTIONNAIRE" means, with respect to each Bank, an
administrative questionnaire in the form prepared by the Administrative Agent
and submitted to the Administrative Agent (with a copy to the Borrower) duly
completed by such Bank.

     "APPLICABLE LENDING OFFICE" means, with respect to any Bank, (i) in the
case of its Base Rate Loans, its Domestic Lending Office and (ii) in the case of
its Euro-Dollar Loans, its Euro-Dollar Lending Office.

     "ASSIGNEE" has the meaning set forth in Section 10.06.

     "BANK" means each bank listed on the signature pages hereof, each Assignee
which becomes a Bank pursuant to Section 10.06, and their respective successors.

     "BASE RATE" means, for any day, a rate per annum equal to the higher of (i)
the Prime Rate for such day and (ii) the sum of 1/2 of 1% plus the Federal Funds
Rate for such day.

     "BASE RATE LOAN" means a Loan which bears interest at the Base Rate
pursuant to the applicable Notice of Borrowing or Notice of Interest Rate
Election or the provisions of Section 2.09 or Article 8.

     "BENEFIT ARRANGEMENT" means at any time an employee benefit plan within the
meaning of Section 3(3) of ERISA which is not a Plan or a Multiemployer Plan and
which is maintained or otherwise contributed to by any member of the Borrower's
ERISA Group.

     "BERMUDA COMPANIES LAW" means The Companies Act 1981 of Bermuda, as
amended, and the regulations promulgated thereunder.

     "BORROWER" means ACE US Holdings, Inc., a Delaware corporation, and its
successors.

     "BORROWING" has the meaning set forth in Section 1.03.

     "BORROWING DATE" means the date of the Borrowing hereunder.

     "CASH AVAILABLE" means, for any period, the sum (without duplication) of
(i) the excess over $3,000,000 of the cash and cash equivalents held by the
Borrower on the first day of such period, (ii) cash dividends, cash interest
payments, and other cash income received by the Borrower during such period,
(iii) the cash proceeds to the Borrower of loans made under the Subordinated 

                                       2
<PAGE>
 
Loan Agreement during such period and (iv) the unused amount of the "Commitment"
(as defined in the Subordinated Loan Agreement) at the end of such period.

     "CLOSING DATE" means the date on or after the Effective Date and on or
before the Borrowing Date on which the Administrative Agent shall have received
the documents specified in or pursuant to Section 3.01.

     "CO-AGENT" means each Bank designated as a Co-Agent on the signature pages
hereof, in its capacity as co-agent in respect of this Agreement.

     "COMMITMENT" means, with respect to each Bank, the amount set forth
opposite the name of such Bank on the signature pages hereof.

     "CONSOLIDATED DEBT" means at any date the Debt of the Guarantor and its
Consolidated Subsidiaries, determined on a consolidated basis as of such date.

     "CONSOLIDATED NET INCOME" means, for any period, the net income of the
Guarantor and its Consolidated Subsidiaries, determined on a consolidated basis
for such period.

     "CONSOLIDATED SUBSIDIARY" means at any date, with respect to any Person,
any Subsidiary or other entity the accounts of which would be consolidated with
those of such Person in its consolidated financial statements if such statements
were prepared as of such date.

     "CONSOLIDATED TANGIBLE NET WORTH" means at any date the consolidated
stockholders' equity of the Guarantor and its Consolidated Subsidiaries less
their consolidated Intangible Assets, all determined as of such date; provided
that such determination for purposes of Sections ,  and  shall be made without
giving effect to adjustments pursuant to Statement No. 115 of the Financial
Accounting Standards Board.  For purposes of this definition "INTANGIBLE ASSETS"
means the amount (to the extent reflected in determining such consolidated
stockholders' equity) of (i) all write-ups (other than write-ups resulting from
foreign currency translations and write-ups of assets of a going concern
business made within twelve months after the acquisition of such business)
subsequent to June 30, 1997 in the book value of any asset owned by the
Guarantor or a Consolidated Subsidiary and (ii) all unamortized debt discount
and expense, unamortized deferred charges, deferred acquisition costs, goodwill,
patents, trademarks, service marks, trade names, anticipated future benefit of
tax loss carry-forwards, copyrights, organization or developmental expenses and
other intangible assets.

                                       3
<PAGE>
 
     "DEBT" of any Person means at any date, without duplication, (i) all
obligations of such Person for borrowed money, (ii) all obligations of such
Person evidenced by bonds, debentures, notes or other similar instruments, (iii)
all obligations of such Person to pay the deferred purchase price of property or
services, except trade accounts payable arising in the ordinary course of
business, (iv) all obligations of such Person as lessee which are capitalized in
accordance with generally accepted accounting principles, (v) all non-contingent
obligations (and, solely for purposes of Section 5.10 and the definitions of
Material Debt and Material Financial Obligations, all contingent obligations) of
such Person to reimburse any bank or other Person in respect of amounts paid
under a letter of credit or similar instrument, (vi) all Debt secured by a Lien
on any asset of such Person, whether or not such Debt is otherwise an obligation
of such Person, and (vii) all Debt of others Guaranteed by such Person, provided
that the term "DEBT" shall not include obligations of an insurance company under
insurance policies or surety bonds issued by it.

     "DEBT SERVICE" means, for any period, the sum of (i) the interest expense
of the Borrower for such period and (ii) scheduled payments of principal on Debt
of the Borrower due during such period.

     "DEBT SERVICE COVERAGE RATIO" means, at any date, the ratio of Cash
Available for the period of four consecutive fiscal quarters ended at such date
(or, if shorter, the period from the Borrowing Date through such date) to Debt
Service for such period.

     "DEFAULT" means any condition or event which constitutes an Event of
Default or which with the giving of notice or lapse of time or both would,
unless cured or waived, become an Event of Default.

     "DERIVATIVES OBLIGATIONS" of any Person means all obligations of such
Person in respect of any rate swap transaction, basis swap, forward rate
transaction, commodity swap, commodity option, equity or equity index swap,
equity or equity index option, bond option, interest rate option, foreign
exchange transaction, cap transaction, floor transaction, collar transaction,
currency swap transaction, cross-currency rate swap transaction, currency option
or any other similar transaction (including any option with respect to any of
the foregoing transactions) or any combination of the foregoing transactions.

     "DOCUMENTATION AGENT" means Morgan Guaranty Trust Company of New York in
its capacity as documentation agent in respect of this Agreement.

                                       4
<PAGE>
 
     "DOMESTIC BUSINESS DAY" means any day except a Saturday, Sunday or other
day on which commercial banks in New York City are authorized by law to close.

     "DOMESTIC LENDING OFFICE" means, as to each Bank, its office located at its
address set forth in its Administrative Questionnaire (or identified in its
Administrative Questionnaire as its Domestic Lending Office) or such other
office as such Bank may hereafter designate as its Domestic Lending Office by
notice to the Borrower and the Administrative Agent.

     "EFFECTIVE DATE" means the date this Agreement becomes effective in
accordance with Section 10.09.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended, or any successor statute.

     "ERISA GROUP" means, with respect to any Person, such Person, any
Subsidiary of such Person and all members of a controlled group of corporations
and all trades or businesses (whether or not incorporated) under common control
which, together with such Person or any such Subsidiary, are treated as a single
employer under Section 414 of the Internal Revenue Code.

     "EURO-DOLLAR BUSINESS DAY" means any Domestic Business Day on which
commercial banks are open for international business (including dealings in
dollar deposits) in London.

     "EURO-DOLLAR LENDING OFFICE" means, as to each Bank, its office, branch or
affiliate located at its address set forth in its Administrative Questionnaire
(or identified in its Administrative Questionnaire as its Euro-Dollar Lending
Office) or such other office, branch or affiliate of such Bank as it may
hereafter designate as its Euro-Dollar Lending Office by notice to the Borrower
and the Administrative Agent.

     "EURO-DOLLAR LOAN" means a Loan which bears interest at a Euro-Dollar Rate
pursuant to the applicable Notice of Committed Borrowing or Notice of Interest
Rate Election.

     "EURO-DOLLAR MARGIN" has the meaning set forth in Section 2.06.

     "EURO-DOLLAR RATE" means a rate of interest determined pursuant to Section
on the basis of a London Interbank Offered Rate.

                                       5
<PAGE>
 
     "EURO-DOLLAR RESERVE PERCENTAGE" means for any day that percentage
(expressed as a decimal) which is in effect on such day, as prescribed by the
Board of Governors of the Federal Reserve System (or any successor) for
determining the maximum reserve requirement for a member bank of the Federal
Reserve System in New York City with deposits exceeding five billion dollars in
respect of "EUROCURRENCY LIABILITIES" (or in respect of any other category of
liabilities which includes deposits by reference to which the interest rate on
Euro-Dollar Loans is determined or any category of extensions of credit or other
assets which includes loans by a non-United States office of any Bank to United
States residents).

     "EVENT OF DEFAULT" has the meaning set forth in Section 6.01.

     "FEDERAL FUNDS RATE" means, for any day, the rate per annum (rounded
upward, if necessary, to the nearest 1/100th of 1%) equal to the weighted
average of the rates on overnight Federal funds transactions with members of the
Federal Reserve System arranged by Federal funds brokers on such day, as
published by the Federal Reserve Bank of New York on the Domestic Business Day
next succeeding such day, provided that (i) if such day is not a Domestic
Business Day, the Federal Funds Rate for such day shall be such rate on such
transactions on the next preceding Domestic Business Day as so published on the
next succeeding Domestic Business Day, and (ii) if no such rate is so published
on such next succeeding Domestic Business Day, the Federal Funds Rate for such
day shall be the average rate quoted to Morgan Guaranty Trust Company of New
York on such day on such transactions as determined by the Administrative Agent.

     "FINANCING DOCUMENTS" means this Agreement, the Notes, the Pledge Agreement
and the Subordinated Loan Agreement.

     "GROUP OF LOANS" means at any time a group of Loans consisting of (i) all
Base Rate Loans which are outstanding at such time or (ii) all Euro-Dollar Loans
having the same Interest Period at such time; provided that, if a Loan of any
particular Bank is converted to or made as a Base Rate Loan pursuant to Section
8.02 or 8.04, such Loan shall be included in the same Group or Groups of Loans
from time to time as it would have been in if it had not been so converted or
made.

     "GUARANTEE" by any Person means any obligation, contingent or otherwise, of
such Person directly or indirectly guaranteeing any Debt of any other Person
and, without limiting the generality of the foregoing, any obligation, direct or
indirect, contingent or otherwise, of such Person (i) to purchase or pay (or
advance or supply funds for the purchase or payment of) such Debt (whether
arising by virtue of partnership arrangements, by agreement to keep-well, to

                                       6
<PAGE>
 
purchase assets, goods, securities or services, to take-or-pay, or to maintain
financial statement conditions or otherwise) or (ii) entered into for the
purpose of assuring in any other manner the holder of such Debt of the payment
thereof or to protect such holder against loss in respect thereof (in whole or
in part), provided that the term Guarantee shall not include endorsements for
collection or deposit in the ordinary course of business.  The term "GUARANTEE"
used as a verb has a corresponding meaning.

     "GUARANTOR" means ACE Limited, a Cayman Islands company limited by shares,
and its successors.

     "INDEMNITEE" has the meaning set forth in Section 10.03(b).

     "INFORMATION MEMORANDUM" means the confidential information memorandum
dated November 1997 furnished to the Banks in connection with this Agreement.

     "INTEREST PERIOD" means, with respect to each Euro-Dollar Loan, the period
commencing on the date of borrowing specified in the Notice of Borrowing or on
the date specified in an applicable Notice of Interest Rate Election and ending
one, two, three or six months thereafter, as the Borrower may elect in the
applicable notice; provided that:

               (a)  any Interest Period which would otherwise end on a day which
     is not a Euro-Dollar Business Day shall, subject to clause (c) below, be
     extended to the next succeeding Euro-Dollar Business Day unless such Euro-
     Dollar Business Day falls in another calendar month, in which case such
     Interest Period shall end on the next preceding Euro-Dollar Business Day;

               (b)  any Interest Period which begins on the last Euro-Dollar
     Business Day of a calendar month (or on a day for which there is no
     numerically corresponding day in the calendar month at the end of such
     Interest Period) shall, subject to clause (c) below, end on the last Euro-
     Dollar Business Day of a calendar month; and

               (c)  no Interest Period applicable to any Loan shall extend
     beyond any Principal Payment Date unless the aggregate principal amount of
     Loans represented by Base Rate Loans, or by Euro-Dollar Loans having
     Interest Periods that will expire on or before such Principal Payment Date,
     equals or exceeds the amount of principal due on such Principal Payment
     Date.

                                       7
<PAGE>
 
     "INTERNAL REVENUE CODE" means the Internal Revenue Code of 1986, as
amended, or any successor statute.

     "INVESTMENT" means any investment in any Person, whether by means of share
purchase, capital contribution, loan, Guarantee, time deposit or otherwise (but
not including any demand deposit).

     "LIEN" means, with respect to any asset, any mortgage, lien, pledge,
charge, security interest or encumbrance of any kind, or any other type of
preferential arrangement that has the practical effect of creating a security
interest, in respect of such asset. For the purposes of this Agreement, the
Borrower or any Subsidiary shall be deemed to own subject to a Lien any asset
which it has acquired or holds subject to the interest of a vendor or lessor
under any conditional sale agreement, capital lease or other title retention
agreement relating to such asset.

     "LOAN" means a loan made by a Bank pursuant to Section 2.01; provided that,
if any such loan or loans (or portions thereof) are combined or subdivided
pursuant to a Notice of Interest Rate Election, the term "LOAN" shall refer to
the combined principal amount resulting from such combination or to each of the
separate principal amounts resulting from such subdivision, as the case may be.

     "LONDON INTERBANK OFFERED RATE" has the meaning set forth in Section 
2.01(b).

     "MANAGING AGENT" means Citibank, N.A. in its capacity as managing agent in
respect of this Agreement.

     "MATERIAL DEBT" means Debt (other than the Notes) of the Guarantor and/or
one or more of its Subsidiaries, arising in one or more related or unrelated
transactions, in an aggregate principal or face amount exceeding $25,000,000.

     "MATERIAL FINANCIAL OBLIGATIONS" means a principal or face amount of Debt
and/or current payment obligations in respect of Derivatives Obligations of the
Guarantor and/or one or more of its Subsidiaries, arising in one or more related
or unrelated transactions, exceeding in the aggregate $25,000,000.

     "MATERIAL INSURANCE COMPANY" means each of ACE Insurance, Westchester Fire
Insurance Company, Westchester Surplus Lines Insurance Company and Industrial
Underwriters Insurance Company.

     "MATERIAL PLAN" means at any time a Plan or Plans having aggregate Unfunded
Liabilities in excess of $25,000,000.

                                       8
<PAGE>
 
     "MULTIEMPLOYER PLAN" means at any time an employee pension benefit plan
within the meaning of Section 4001(a)(3) of ERISA to which any member of the
Borrower's ERISA Group is then making or accruing an obligation to make
contributions or has within the preceding five plan years made contributions,
including for these purposes any Person which ceased to be a member of the
Borrower's ERISA Group during such five year period.

     "NOTES" means promissory notes of the Borrower, substantially in the form
of Exhibit A hereto, evidencing the obligation of the Borrower to repay the
Loans, and "NOTE" means any one of such promissory notes issued hereunder.

     "NOTICE OF BORROWING" has the meaning set forth in Section 2.02.

     "NOTICE OF INTEREST RATE ELECTION" has the meaning set forth in Section
2.09.

     "OBLIGORS" means the Borrower and the Guarantor.

     "OTHER TAXES" has the meaning set forth in Section 8.04(b).

     "PARENT" means, with respect to any Bank, any Person controlling such Bank.

     "PARTICIPANT" has the meaning set forth in Section 10.06(b).

     "PERSON" means an individual, a corporation, a partnership, a limited
liability company, an association, a trust or any other entity or organization,
including a government or political subdivision or an agency or instrumentality
thereof.

     "PLAN" means at any time an employee pension benefit plan (other than a
Multiemployer Plan) which is covered by Title IV of ERISA or subject to the
minimum funding standards under Section 412 of the Internal Revenue Code and
either (i) is maintained, or contributed to, by any member of the Borrower's
ERISA Group for employees of any member of the Borrower's ERISA Group or (ii)
has at any time within the preceding five years been maintained, or contributed
to, by any Person which was at such time a member of the Borrower's ERISA Group
for employees of any Person which was at such time a member of the Borrower's
ERISA Group.

     "PLEDGE AGREEMENT" means a Pledge Agreement dated as of the Closing Date
between the Borrower and the Administrative Agent, substantially in the

                                       9
<PAGE>
 
form of Exhibit B hereto, as executed and delivered and as the same may be
amended from time to time in accordance with the provisions hereof and thereof.

     "PRICING SCHEDULE" means the Schedule hereto titled as such.

     "PRIME RATE" means the rate of interest publicly announced by Morgan
Guaranty Trust Company of New York in New York City from time to time as its
Prime Rate.

     "PRINCIPAL PAYMENT DATE" means each anniversary of the Borrowing Date from
and including the first anniversary thereof to and including the seventh
anniversary thereof.

     "REFERENCE BANKS" means the principal London offices of Deutsche Bank AG,
Mellon Bank N.A. and Morgan Guaranty Trust Company of New York.

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

     "RELATED DOCUMENTS" means (i) the Financing Documents, (ii) the "Financing
Documents" as defined in each of the Five-Year Credit Agreement and the 364-Day
Credit Agreement, each of even date herewith, among the Guarantor, as borrower,
the guarantors party thereto, the Banks parties thereto and Morgan Guaranty
Trust Company of New York, as administrative agent for such Banks, and (iii) the
"Financing Documents" as defined in the Amended and Restated Reimbursement
Agreement dated as of December 11, 1997 among ACE Insurance, the Banks parties
thereto and Morgan Guaranty Trust Company of New York, as issuing bank and
administrative agent for such Banks, in each case as the same may be amended and
in effect from time to time.

     "RELEVANT PARTY" means each of the Obligors and ACE Insurance.

     "REQUIRED BANKS" means at any time Banks having at least 66 2/3% of the
aggregate amount of the Commitments or, if the Commitments shall have been
terminated, holding Notes evidencing at least 66 2/3% of the aggregate unpaid
principal amount of the Loans.

     "RESTRICTED PAYMENT" means (i) any dividend or other distribution on any
shares of the Borrower's capital stock (except dividends payable solely in
shares of its capital stock other than mandatorily redeemable preferred stock)
or (ii) any payment on account of the purchase, redemption, retirement or
acquisition of (a) any shares of the Borrower's capital stock or (b) any option,
warrant or other right to acquire shares of the Borrower's capital stock or
(iii) any payment of principal

                                       10
<PAGE>
 
of or, if at the time of such payment any Default exists, interest on Debt
incurred in reliance on clause (ii) or (iii) of Section 5.08(b).

     "STOCK PURCHASE AGREEMENT" means the Stock Purchase Agreement dated as of
September 18, 1997, between Talegen Holdings, Inc., a Delaware corporation, and
the Guarantor as amended and in effect from time to time; provided that any such
amendment from the form thereof heretofore furnished to each of the Banks shall
be effective for purposes of references thereto in this Agreement only if such
amendment shall have received the written consent of the Required Banks (which
shall not be unreasonably withheld).

     "SUBORDINATED LOAN AGREEMENT" means a subordinated loan agreement dated as
of the Borrowing Date between ACE Insurance and the Borrower in substantially
the form of Exhibit C hereto, as executed and delivered and as the same may be
amended from time to time in accordance with the provisions hereof and thereof.

     "SUBSIDIARY" means, as to any Person, any corporation or other entity of
which securities or other ownership interests having ordinary voting power to
elect a majority of the board of directors or other persons performing similar
functions are at the time directly or indirectly owned by such Person; unless
otherwise specified, "SUBSIDIARY" means a Subsidiary of the Guarantor.

     "SYNDICATION AGENT" means either J.P. Morgan Securities Inc. or Mellon Bank
N.A. in its capacity as a syndication agent in respect of this Agreement, and
"SYNDICATION AGENTS" means both of them.

     "TAXES" has the meaning set forth in Section 8.04(a).

     "TEMPORARY CASH INVESTMENT" means any Investment in (i) direct obligations
of the United States or any agency thereof or obligations guaranteed by the
United States or any agency thereof, (ii) commercial paper rated at least A-1 by
Standard & Poor's Ratings Services and P-1 by Moody's Investors Services, Inc.,
(iii) time deposits with, including certificates of deposit issued by, any
office located in the United States of any bank or trust company which is
organized or licensed under the laws of the United States or any State thereof
and has capital, surplus and undivided profits aggregating at least
$1,000,000,000 or (iv) repurchase agreements with respect to securities
described in clause (i) above entered into an office of a bank or trust company
meeting the criteria specified in clause (iii) above.

     "TERMINATION DATE" means the date on which the Commitments terminate
pursuant to Section 2.08 or 6.01.

                                       11
<PAGE>
 
     "UNFUNDED LIABILITIES" means, with respect to any Plan at any time, the
amount (if any) by which (i) the value of all benefit liabilities under such
Plan, determined on a plan termination basis using the assumptions prescribed by
the PBGC for purposes of Section 4044 of ERISA (or other applicable standard),
exceeds (ii) the fair market value of all Plan assets allocable to such
liabilities under Title IV of ERISA (excluding any accrued but unpaid
contributions), all determined as of the then most recent valuation date for
such Plan, but only to the extent that such excess represents a potential
liability of a member of the Borrower's ERISA Group to the PBGC or any other
Person under Title IV of ERISA.

     "WHOLLY-OWNED CONSOLIDATED SUBSIDIARY" means, with respect to any Person,
any Consolidated Subsidiary all of the shares of capital stock or other
ownership interests of which (except directors' qualifying shares) are at the
time directly or indirectly owned by such Person.

     "WSG" means Westchester Specialty Group, Inc., a Delaware corporation, and
the owner of all outstanding capital stock of Westchester Fire Insurance
Company, Westchester Surplus Lines Insurance Company and Industrial Underwriters
Insurance Company, all of which are engaged in the property and casualty
insurance business.

     "WSG ACQUISITION" means the acquisition by the Borrower of WSG pursuant to
the Stock Purchase Agreement.

     Section 1.02.  Accounting Terms and Determinations.  Unless otherwise
specified herein, all accounting terms used herein shall be interpreted, all
accounting determinations hereunder shall be made, and all financial statements
required to be delivered hereunder shall be prepared in accordance with United
States generally accepted accounting principles as in effect from time to time,
applied on a basis consistent (except for changes concurred in by the
Guarantor's independent public accountants) with the most recent audited
consolidated financial statements of the Guarantor and its Consolidated
Subsidiaries delivered to the Banks; provided that, if the Obligors notify the
Administrative Agent that the Obligors wish to amend any covenant in Article  to
eliminate the effect of any change in generally accepted accounting principles
on the operation of such covenant (or if the Administrative Agent notifies the
Obligors that the Required Banks wish to amend Article  for such purpose), then
compliance with such covenant shall be determined on the basis of generally
accepted accounting principles in effect immediately before the relevant change
in generally accepted accounting principles became effective, until either such
notice is withdrawn or such covenant is amended in a manner satisfactory to the
Obligors and the Required Banks.

                                       12
<PAGE>
 
     Section 1.03.  Types of Borrowings. The term "BORROWING" denotes the
aggregation of the Loans of the respective Banks to be made to the Borrower
pursuant to Article  on a single date designated pursuant to Section . The
Borrowing is classified for purposes of this Agreement by reference to the
pricing of Loans comprising the Borrowing (e.g., "EURO-DOLLAR BORROWING" is used
to describe the Borrowing hereunder if the Borrowing is comprised of Euro-Dollar
Loans).

     Section 1.04.  United States Dollars.  Each reference herein to "DOLLARS"
or "$" shall refer to United States Dollars.


                                   ARTICLE 2
                                   The Loans

     Section 2.01.  Commitments to Lend.  Each Bank severally agrees, on the
terms and conditions set forth in this Agreement, to make a loan to the Borrower
pursuant to this Section on a single date designated pursuant to Section 2.02,
in an amount equal to the amount of its Commitment.

     Section 2.02.  Notice of Borrowing.  The Borrower shall give the
Administrative Agent notice (a "NOTICE OF BORROWING") not later than 10:30 A.M.
(New York City time) on (x) the date of the Borrowing if the Borrowing is a Base
Rate Borrowing and (y) the third Euro-Dollar Business Day before the Borrowing
if the Borrowing is a Euro-Dollar Borrowing, specifying:

     (a)  the date of the Borrowing, which shall be a Domestic Business Day in
the case of a Base Rate Borrowing or a Euro-Dollar Business Day in the case of a
Euro-Dollar Borrowing,

     (b)  whether the Loans comprising the Borrowing are to bear interest
initially at the Base Rate or a Euro-Dollar Rate, and

     (c)  in the case of a Euro-Dollar Borrowing, the duration of the initial
Interest Period applicable thereto, subject to the provisions of the definition
of Interest Period.

     Section 2.03.  Notice of Banks; Funding of Loans.  (a) Upon receipt of a
Notice of Borrowing, the Administrative Agent shall promptly notify each Bank of
the contents thereof and such Notice of Borrowing shall not thereafter be
revocable by the Borrower.

                                       13
<PAGE>
 
     (b)  Not later than 12:00 Noon (New York City time) on the date of the
Borrowing, each Bank shall make available its share of the Borrowing, in Federal
or other funds immediately available in New York City, to the Administrative
Agent at its address referred to in Section 10.01. Unless the Administrative
Agent determines that any applicable condition specified in Article has not been
satisfied, the Administrative Agent will make the funds so received from the
Banks available to the Borrower at the Administrative Agent's aforesaid address.

     (c)  Unless the Administrative Agent shall have received notice from a Bank
prior to the date of the Borrowing that such Bank will not make available to the
Administrative Agent such Bank's share of the Borrowing, the Administrative
Agent may assume that such Bank has made such share available to the
Administrative Agent on the date of the Borrowing in accordance with subsection
of this Section 2.03(b) of this Section 2.03 and the Administrative Agent may,
in reliance upon such assumption, make available to the Borrower on such date a
corresponding amount. If and to the extent that such Bank shall not have so made
such share available to the Administrative Agent, such Bank and the Borrower
severally agree to repay to the Administrative Agent forthwith on demand such
corresponding amount together with interest thereon, for each day from the date
such amount is made available to the Borrower until the date such amount is
repaid to the Administrative Agent, at (i) in the case of the Borrower, a rate
per annum equal to the interest rate applicable thereto pursuant to Section
2.06 and (ii) in the case of such Bank, the Federal Funds Rate. If
such Bank shall repay to the Administrative Agent such corresponding amount,
such amount so repaid shall constitute such Bank's Loan included in the
Borrowing for purposes of this Agreement.

     Section 2.04.  Notes.  (a)  The Loans of each Bank shall be evidenced by a
Note payable to the order of such Bank for the account of its Applicable Lending
Office in an amount equal to the aggregate unpaid principal amount of such
Bank's Loans.

     (b)  Each Bank may, by notice to the Borrower and the Administrative Agent,
request that its Loans of a particular type be evidenced by a separate Note in
an amount equal to the aggregate unpaid principal amount of such Loans.  Each
such Note shall be in substantially the form of Exhibit A hereto with
appropriate modifications to reflect the fact that it evidences solely Loans of
the relevant type. Each reference in this Agreement to the "NOTE" of such Bank
shall be deemed to refer to and include any or all of such Notes, as the context
may require.

     (c)  Upon receipt of each Bank's Note pursuant to Section 3.01, the
Administrative Agent shall forward such Note to such Bank.  Each Bank shall
record the date, amount and type of each Loan made by it and the date and amount

                                       14
<PAGE>
 
of each payment of principal made by the Borrower with respect thereto, and may,
if such Bank so elects in connection with any transfer or enforcement of its
Note, endorse on the schedule forming a part thereof appropriate notations to
evidence the foregoing information with respect to each such Loan then
outstanding; provided that the failure of any Bank to make any such recordation
or endorsement shall not affect the obligations of any Obligor hereunder or
under the Notes.  Each Bank is hereby irrevocably authorized by the Borrower so
to endorse its Note and to attach to and make a part of its Note a continuation
of any such schedule as and when required.

     Section 2.05.  Amortization of Loans. The Loans shall mature in seven
installments of principal as set forth below.  On each Principal Payment Date,
the Borrower shall repay an aggregate principal amount of the Loans equal to the
applicable amount indicated in the table below.

<TABLE>
<CAPTION>
             Principal Payment Date   Amortization Amount
          --------------------------------------------------
             <S>                       <C>
                    Nos. 1-2              $ 10,000,000
          --------------------------------------------------
                    Nos. 3-4              $ 25,000,000
          --------------------------------------------------
                    No. 5                 $ 32,500,000
          --------------------------------------------------
                    No. 6                 $ 37,500,000
          --------------------------------------------------
                    No. 7                 $110,000,000
          --------------------------------------------------
</TABLE>

     Each such payment of principal shall be made together with accrued interest
thereon.  Each such payment shall be applied to such Group or Groups of Loans as
the Borrower may designate by not less than three Euro-Dollar Business Days'
notice to the Administrative Agent (or, failing such designation, as determined
by the Administrative Agent), and shall be applied ratably to the Loans of the
several Banks included in any such Group.

     Section 2.06.  Interest Rates.  (a) Each Base Rate Loan shall bear interest
on the outstanding principal amount thereof, for each day from the date such
Loan is made until it becomes due, at a rate per annum equal to the Base Rate
for such day.  Such interest shall be payable at maturity, quarterly in arrears
on the last day of each March, June, September and December prior to maturity,
and with respect to the principal amount of any Base Rate Loan converted to a
Euro-Dollar Loan, on the date such amount is so converted.  Any overdue
principal of or interest on any Base Rate Loan shall bear interest, payable on
demand, for each day until paid at a rate per annum equal to the sum of 2% plus
the rate otherwise applicable to Base Rate Loans for such day.

                                       15
<PAGE>
 
     (b)  Each Euro-Dollar Loan shall bear interest on the outstanding principal
amount thereof, for each day during each Interest Period applicable thereto, at
a rate per annum equal to the sum of the Euro-Dollar Margin for such day plus
the London Interbank Offered Rate applicable to such Interest Period. Such
interest shall be payable for each Interest Period on the last day thereof and,
if such Interest Period is longer than three months, at intervals of three
months after the first day thereof.

     "EURO-DOLLAR MARGIN" means a rate per annum determined daily in accordance
with the Pricing Schedule.

     The "LONDON INTERBANK OFFERED RATE" applicable to any Interest Period means
the average (rounded upward, if necessary, to the next higher 1/16 of 1%) of the
respective rates per annum at which deposits in dollars are offered to each of
the Reference Banks in the London interbank market at approximately 11:00 A.M.
(London time) two Euro-Dollar Business Days before the first day of such
Interest Period in an amount approximately equal to the principal amount of the
Euro-Dollar Loan of such Reference Bank to which such Interest Period is to
apply and for a period of time comparable to such Interest Period.

     (c)  Any overdue principal of or interest on any Euro-Dollar Loan shall
bear interest, payable on demand, for each day until paid at a rate per annum
equal to the higher of (i) the sum of 2% plus the Euro-Dollar Margin plus the
London Interbank Offered Rate applicable to such Loan at the date of such
payment was due and (ii) the sum of 2% plus the Euro-Dollar Margin plus the
quotient obtained (rounded upward, if necessary, to the next higher 1/100 of 1%)
by dividing (x) the average (rounded upward, if necessary, to the next higher
1/16 of 1%) of the respective rates per annum at which one day (or, if such
amount due remains unpaid more than three Euro-Dollar Business Days, then for
such other period of time not longer than six months as the Administrative Agent
may select) deposits in dollars in an amount approximately equal to such overdue
payment due to each of the Reference Banks are offered to such Reference Bank in
the London interbank market for the applicable period determined as provided
above by (y) 1.00 minus the Euro-Dollar Reserve Percentage (or, if the
circumstances described in clause (a) or (b) of Section 8.01 shall exist, at a
rate per annum equal to the sum of 2% plus the rate applicable to Base Rate
Loans for such day).

     (d)  The Administrative Agent shall determine each interest rate applicable
to the Loans hereunder.  The Administrative Agent shall give prompt notice to
the Borrower and the participating Banks of each rate of interest so determined,
and its determination thereof shall be conclusive in the absence of manifest
error.

                                       16
<PAGE>
 
     (e)  Each Reference Bank agrees to use its best efforts to furnish 
quotations to the Administrative Agent as contemplated by this Section 2.06. If 
any Reference Bank does not furnish a timely quotation, the Administrative Agent
shall determine the relevant interest rate on the basis of the quotation or 
quotations furnished by the remaining Reference Bank or Banks or, if none of 
such quotations is available on a timely basis, the provisions of Section 8.01 
shall apply.

     SECTION 2.07. Fees. (a) The Borrower shall pay to the Administrative Agent 
for the account of the Banks ratably a ticking fee at the rate of 0.06% per 
annum. Such ticking fee shall accrue from and including the date hereof to but 
excluding the Termination Date on the aggregate amount of the Commitments and 
shall be payable on the Termination Date.

     (b)  The Borrower shall pay to the Administrative Agent for the account of 
the Banks in the proportions heretofore mutually agreed a participation fee in 
the amount heretofore mutually agreed. Such participation fee shall be payable 
on the Borrowing Date.

     SECTION 2.08. Mandatory Termination of Commitments. The Commitments shall 
terminate at the close of business on the earlier of (i) the Borrowing Date and 
(ii) May 1, 1998.

     SECTION 2.09. Method of Electing Interest Rates. (a) The Loans included in 
the Borrowing shall bear interest initially at the type of rate specified by the
Borrower in the applicable Notice of Borrowing. Thereafter, the Borrower may 
from time to time elect to change or continue the type of interest rate borne by
each Group of Loans (subject to subsection 2.09(d) of this Section and the 
provisions of Article 8), as follows:

          (i)  if such Loans are Base Rate Loans, the Borrower may elect to
     convert such Loans to Euro-Dollar Loans as of any Euro-Dollar Business Day;
     and

          (ii) if such Loans are Euro-Dollar Loans, the Borrower may elect to 
     convert such Loans to Base Rate Loans or elect to continue such Loans as
     Euro-Dollar Loans for an additional Interest Period, subject to Section
     2.12 if any such conversion or continuation is effective on any day other
     than the last day of an Interest Period applicable to such Loans.

Each such election shall be made by delivering a notice (a "NOTICE OF INTEREST
RATE ELECTION") to the Administrative Agent not later than 10:30 A.M. (New York
City time) on the third Euro-Dollar Business Day before the conversion or

                                      17
<PAGE>
 
continuation selected in such notice is to be effective. A Notice of Interest
Rate Election may, if it so specifies, apply to only a portion of the aggregate
principal amount of the relevant Group of Loans; provided that (i) such portion
is allocated ratably among the Loans comprising such Group and (ii) the portion
to which such notice applies, and the remaining portion to which it does not
apply, are each at least $10,000,000 or any larger amount in multiples of
$1,000,000 (unless such portion is comprised of Base Rate Loans). If no such
notice is timely received before the end of an Interest Period for any Group of
Euro-Dollar Loans, the Borrower shall be deemed to have elected that such Group
of Loans be converted to Base Rate Loans at the end of such Interest Period.

     (b)  Each Notice of Interest Rate Election shall specify:

          (i)   the Group of Loans (or portion thereof) to which such notice 
     applies;

          (ii)  the date on which the conversion or continuation selected in
     such notice is to be effective, which shall comply with the applicable
     clause of subsection 2.09(a) above;

          (iii) if the Loans comprising such Group are to be converted, the new 
     type of Loans and, if the Loans resulting from such conversion are to be 
     Euro-Dollar Loans, the duration of the initial Interest Period applicable 
     thereto; and

          (iv)  if such Loans are to be continued as Euro-Dollar Loans for an 
     additional Interest Period, the duration of such additional Interest 
     Period.

Each Interest Period specified in a Notice of Interest Rate Election shall 
comply with the provisions of the definition of Interest Period.

     (c)  Promptly after receiving a Notice of Interest Rate Election from the 
Borrower pursuant to subsection 2.09(a) above, the Administrative Agent shall
notify each Bank of the contents thereof and such notice shall not thereafter be
revocable by the Borrower.

     (d)  The Borrower shall not be entitled to elect to convert any Loans to, 
or continue any Loans for an additional Interest Period as, Euro-Dollar Loans if
(i) the aggregate principal amounts of any Group of Euro-Dollar Loans created or
continued as a result of such election would be less than $10,000,000 or (ii) a 
Default shall have occurred and be continuing when the Borrower delivers notice 
of such election to the Administrative Agent.

                                      18
          
<PAGE>
 
     SECTION 2.10.  Optional Prepayments. (a) Subject in the case of any 
Euro-Dollar Loan to Section 2.12, the Borrower may, in the case of the Group of 
Base Rate Loans, upon at least one Domestic Business Day's notice to the 
Administrative Agent, or in the case of any Group of Euro-Dollar Loans, upon at 
least three Euro-Dollar Business Days' notice to the Administrative Agent, 
prepay such Group, in each case in whole at any time, or from time to time in 
part in amounts aggregating $10,000,000 or any larger multiple of $1,000,000, by
paying the principal amount to be prepaid together with accrued interest thereon
to the date of prepayment. Each such optional prepayment shall be applied (i) to
prepay retably the Loans of the several Banks included in such Group and (ii) to
scheduled amortization of the Loans in inverse order of maturity.

     (b)  Upon receipt of a notice of prepayment pursuant to this Section, the 
Administrative Agent shall promptly notify each Bank of the contents thereof and
of such Bank's ratable share of such prepayment and such notice shall not 
thereafter be revocable by the Borrower.

     SECTION 2.11.  General Provisions as to Payments. (a) The Borrower shall 
make each payment of principal of, and interest on, the Loans and of fees 
hereunder, not later than 2:00 P.M. (New York City time) on the date when due, 
in Federal or other funds immediately available in New York City and in the 
lawful currency of the United States, to the Administrative Agent at its address
referred to in Section 10.01. The Administrative Agent will promptly distribute 
to each Bank its ratable share of each such payment received by the 
Administrative Agent for the account of the Banks. Whenever any payment of 
principal of, or interest on, the Base Rate Loans or of fees shall be due on a 
day which is not a Domestic Business Day, the date for payment thereof shall be 
extended to the next succeeding Domestic Business Day. Whenever any payment of 
principal of, or interest on, the Euro-Dollar Loans shall be due on a day which 
is not a Euro-Dollar Business Day, the date for payment thereof shall be 
extended to the next succeeding Euro-Dollar Business Day unless such Euro-Dollar
Business Day falls in another calendar month, in which case the date for payment
thereof shall be the next preceding Euro-Dollar Business Day. If the date for 
any payment of principal is extended by operation of law or otherwise, interest 
thereon shall be payable for such extended time.

     (b)  Unless the Administrative Agent shall have received notice from the 
Borrower prior to the date on which any payment is due to the Banks hereunder 
that the Borrower will not make such payment in full, the Administrative Agent 
may assume that the Borrower has made such payment in full to the Administrative
Agent on such date and the Administrative Agent may, in reliance upon such 
assumption, cause to be distributed to each Bank on such due date an amount
equal to the amount then due such Bank. If and to the extent that the

                                      19
<PAGE>
 
Borrower shall not have so made such payment, each Bank shall repay to the 
Administrative Agent forthwith on demand such amount distributed to such Bank 
together with interest thereon, for each day from the date such amount is 
distributed to such Bank until the date such Bank repays such amount to the 
Administrative Agent, at the Federal Funds Rate.

     SECTION 2.12. Funding Losses. If the Borrower makes any payment of 
principal with respect to any Euro-Dollar Loan or any Euro-Dollar Loan is 
converted to a Base Rate Loan (pursuant to Article 2, 6 or 8 or otherwise) on 
any day other than the last day of an Interest Period applicable thereto, or the
last day of an applicable period fixed pursuant to Section 2.07(c), or if the 
Borrower fails to borrow, prepay, convert or continue any Euro-Dollar Loans 
after notice has been given to any Bank in accordance with Section 2.03(a), 
2.09(c) or 2.10(b), the Borrower shall reimburse each Bank within 15 days after 
demand for any resulting loss or expense incurred by it (or by an existing or, 
in the case of the failure of the Borrower to borrow any Euro-Dollar Loans, 
prospective Participant in the related Loan), including (without limitation) any
loss incurred in obtaining, liquidating or employing deposits from third 
parties, but excluding loss of margin for the period after any such payment, 
conversion or continuation or failure to borrow, prepay, convert or continue, 
provided that such Bank shall have delivered to the Borrower a certificate as to
the amount of such loss or expense and setting forth the calculation thereof, 
which certificate shall be conclusive in the absence of manifest error.

     SECTION 2.13.  Computation of Interest and Fees. Interest based on the 
Prime Rate hereunder shall be computed on the basis of a year of 365 days (or 
366 days in a leap year) and paid for the actual number of days elapsed 
(including the first day but excluding the last day). All other interest and all
ticking fees shall be computed on the basis of a year of 360 days and paid for 
the actual number of days elapsed (including the first day but excluding the 
last day).

     SECTION 2.14.  Regulation D Compensation. For so long as any Bank maintains
reserves against "EUROCURRENCY LIABILITIES" (or any other category of 
liabilities which includes deposits by reference to which the interest rate on 
Euro-Dollar Loans is determined or any category of extensions of credit or other
assets which includes loans by a non-United States office of such Bank to United
States residents), and as a result the cost to such Bank (or its Euro-Dollar 
Lending Office) of making or maintaining its Euro-Dollar Loans is increased, 
then such Bank may require the Borrower to pay, contemporaneously with each 
payment of interest on the Euro-Dollar Loans, additional interest on the related
Euro-Dollar Loan of such Bank at a rate per annum up to but not exceeding the 
excess of (i) (A) the applicable London Interbank Offered Rate divided by (B) 
one minus the Euro-Dollar Reserve Percentage over (ii) the applicable London 
Interbank Offered

                                      20
<PAGE>
 
Rate. Any Bank wishing to require payment of such additional interest (x) shall
so notify the Borrower and the Administrative Agent, in which case such
additional interest on the Euro-Dollar Loans of such Bank shall be payable to
such Bank at the place indicated in such notice with respect to each Interest
Period commencing at least three Euro-Dollar Business Days after the giving of
such notice and (y) shall furnish to the Borrower at least five Euro-Dollar
Business Days prior to each date on which interest is payable on the Euro-Dollar
Loans an officer's certificate setting forth the amount to which such Bank is
then entitled under this Section 2.14 (which shall be consistent with such
Bank's good faith estimate of the level at which the related reserves are
maintained by it). Each such certificate shall be accompanied by such
information as the Borrower may reasonably request as to the computation set
forth therein.

                                   ARTICLE 3

                                  CONDITIONS

     SECTION 3.01   Closing. The closing hereunder shall occur upon receipt by 
the Administrative Agent of the following documents, each dated the Closing Date
unless otherwise indicated:

     (a)  a duly executed Note for the account of each Bank dated on or before 
the Closing Date complying with the provisions of Section 2.04;

     (b)  the Pledge Agreement, duly executed by the Borrower;

     (c)  the Subordinated Loan Agreement, duly executed by the Borrower and ACE
Insurance;

     (d)  an opinion of Maples and Calder, counsel for the Guarantor, 
substantially in the form of Exhibit D hereto and covering such additional 
matters relating to the transactions contemplated hereby as the Required Banks 
may reasonably request;

     (e)  an opinion of Conyers, Dill & Pearman, special Bermuda counsel for ACE
Insurance, substantially in the form of Exhibit E hereto and covering such 
additional matters relating to the transactions contemplated hereby as the 
Required Banks may reasonably request;

     (f)  an opinion of Mayer, Brown & Platt, New York counsel for the Borrower,
the Guarantor and ACE Insurance, substantially in the form of Exhibit

                                      21
<PAGE>
 
F hereto and covering such additional matters relating to the transactions
contemplated hereby as the Required Banks may reasonably request;

     (g) an opinion of Davis Polk & Wardwell, special United States counsel
for the Agents, substantially in the form of Exhibit G hereto and covering such
additional matters relating to the transactions contemplated hereby as the
Required Banks may reasonably request;

     (h) a letter from CT System in New York, New York, substantially in the
form of Exhibit J hereto, evidencing CT System's agreement to act as agent for
service of process for the Relevant Parties pursuant to Section 10.10(b); and

     (i) all documents the Administrative Agent may reasonably request
relating to the existence of the Borrower, the Guarantor and ACE Insurance, the
corporate authority for and the validity of the Financing Documents, and any
other matters relevant hereto, all in form and substance satisfactory to the
Administrative Agent.

The Administrative Agent shall promptly notify the Obligors and the Banks of the
Closing Date, and such notice shall be conclusive and binding on all parties
hereto.

     SECTION 3.02. Borrowing. The obligation of any Bank to make a Loan on
the occasion of the Borrowing is subject to the satisfaction of the following
conditions:

     (a) the fact that the Closing Date shall have occurred on or prior to
the Termination Date;

     (b) receipt by the Administrative Agent of a Notice of Borrowing as
required by Section 2.02;

     (c) receipt by the Administrative Agent of payment of the fees payable
pursuant to Section 2.07;

     (d) the fact that, substantially simultaneously with the Borrowing, the
Borrower shall have consummated the WSG Acquisition in accordance with the Stock
Purchase Agreement without waiver of any condition specified therein;

     (e) the fact that no development or change shall have occurred, and no
information shall have become known, after the date hereof that results in a
material change in or deviation from the information contained in the
Information Memorandum and that has had or would reasonably be expected to have
a 

                                       22
<PAGE>
 
material adverse effect on the business, financial position or results of
operations of the Obligors or on the rights and remedies of the Administrative
Agent and the Banks under the Financing Documents;

     (f)  the fact that, immediately before and after the Borrowing, no
Default shall have occurred and be continuing; an d

     (g)  the fact that the representations and warranties of each Obligor
contained in this Agreement shall be true on and as of the Borrowing Date;

     (h)  the fact that the chief executive office of the Borrower on the
Borrowing Date shall be in Atlanta, Georgia;

     (i)  the fact that no Subsidiary of the Borrower shall be subject to
any restriction on its payment of dividends to the Borrower (directly or
indirectly) except such restrictions as are imposed by regulatory authorities to
whose jurisdiction such Subsidiary is subject; and

     (j)  receipt by the Administrative Agent of (i) an opinion of LeBeouf
Lamb Greene & McCrae, L.L.P., special counsel for the Borrower, to the effect
that no action or consent by, or in respect of, any insurance regulatory
authority to whose jurisdiction the Borrower or any of its Subsidiaries is
subject is required in connection with the execution, delivery and performance
by the Borrower of the Financing Documents except such as should have been
obtained and be in full force and effect, which opinion shall be in form and
substance satisfactory to the Administrative Agent, and (ii) a certificate of an
executive officer of the Borrower to the effect that the conditions specified in
this Section 3.02 shall have been satisfied on the Borrowing Date.

The Borrowing hereunder shall be deemed to be a representation and warranty by
the Obligors on the Borrowing Date as to the facts specified in clauses (d)
through (i) of this Section.

                                   ARTICLE 4
                        REPRESENTATIONS AND WARRANTIES

     The Obligors jointly and severally represent and warrant that:

     SECTION 4.01. Corporate Existence and Power. The Borrower and each of
its Subsidiaries is a corporation, the Guarantor is a company limited by shares
and ACE Insurance is a limited liability company, in each case duly
incorporated, 

                                       23
<PAGE>
 
validly existing and in good standing under the laws of its jurisdiction of
incorporation. Each of the Relevant Parties and the Material Insurance Companies
has all corporate powers and all material governmental licenses, authorizations,
consents and approvals required to carry on its respective business as now
conducted. Each of the Borrower and ACE Insurance is a Wholly-Owned Consolidated
Subsidiary of the Guarantor.

     SECTION 4.02. Corporate and Governmental Authorization; No Contravention.
The execution, delivery and performance by each Relevant Party of each Financing
Document to which it is a party are within its corporate powers, have been duly
authorized by all necessary corporate action, require no action or consent by or
in respect of, or filing with, any governmental body, agency or official (except
such as shall have been obtained and be in full force and effect on the
Borrowing Date), and do not contravene, or constitute a default under, any
provision of applicable law or regulation or of the charter or by-laws (or any
comparable document) of any Relevant Party or of any agreement, judgment,
injunction, order, decree or other instrument binding upon any Relevant Party or
any of their respective Subsidiaries or result in the creation or imposition of
any Lien on any asset of any Relevant Party or any of their respective
Subsidiaries .

     SECTION 4.03. Binding Effect. This Agreement constitutes a valid and
binding agreement of each Obligor and each other Financing Document, when
executed and delivered in accordance with this Agreement, will constitute a
valid and binding obligation of each Relevant Party party thereto, in each case
enforceable in accordance with its terms.

     SECTION 4.04. Financial Information. (a) The consolidated balance
sheet of the Guarantor and its Consolidated Subsidiaries as of September 30,
1996 and therelated consolidated statements of operations, shareholders' equity
and cash flows for the fiscal year then ended, reported on by Coopers & Lybrand
LLP, copies of which have been delivered to each of the Banks, fairly present,
in all material respects, in conformity with generally accepted accounting
principles, the consolidated financial position of the Guarantor and its
Consolidated Subsidiaries as of such date and their consolidated results of
operations and cash flows for such fiscal year.

     (b) The unaudited consolidated balance sheet of the Guarantor and its
Consolidated Subsidiaries as of June 30, 1997 and the related unaudited
consolidated statements of operations and cash flows for the nine months then
ended, copies of which have been delivered to each of the Banks, fairly present,
in all material respects, in conformity with generally accepted accounting
principles (except for the absence of footnotes) applied on a basis consistent
with the financial statements referred to in subsection 4.04(a) of this Section,
the

                                       24
<PAGE>
 
consolidated financial position of the Guarantor and its Consolidated
Subsidiaries as of such date and their consolidated results of operations and
cash flows for such nine month period (subject to normal year-end adjustments).

     (c)  Since June 30, 1997 there has been no material adverse change in the
business, financial position, or results of operations of the Guarantor and its
Consolidated Subsidiaries, considered as a whole.

     (d)  The consolidated balance sheet of ACE Insurance and its Consolidated
Subsidiaries as of September 30, 1996 and the related consolidated statements of
operations and retained earnings and of cash flows for the fiscal year then
ended, all reported on by Coopers & Lybrand LLP, copies of which have been
delivered to each of the Banks, fairly present, in all material respects, in
conformity with generally accepted accounting principles, the consolidated
financial position of ACE Insurance and its Consolidated Subsidiaries as of such
date and their consolidated results of operations and retained earnings and cash
flows for such fiscal year.

     (e)  Since September 30, 1996 there has been no material adverse change in
the business, financial position or results of operations of ACE Insurance and
its Consolidated Subsidiaries, considered as a whole.

     (f)  The consolidated balance sheet of WSG and its Consolidated
Subsidiaries as of December 31, 1996 and the related consolidated statements of
operations, of shareholder's equity and of cash flows for the fiscal year then
ended, all reported on by KPMG Peat Marwick LLP, copies of which have been
delivered to each of the Banks, fairly present, in all material respects, in
conformity with generally accepted accounting principles, the consolidated
financial position of WSG and its Consolidated Subsidiaries as of such date and
their consolidated results of operations and cash flows for such fiscal year.

     (g)  The unaudited consolidated balance sheet of WSG and its Consolidated
Subsidiaries as of June 30, 1997 and the related unaudited consolidated
statements of operations, of shareholder's equity and of cash flows for the six
months then ended, copies of which have been delivered to each of the Banks,
fairly present, in all material respects, in conformity with generally accepted
accounting principles (except for the absence of footnotes), the consolidated
financial position of WSG and its Consolidated Subsidiaries as of such date and
their consolidated results of operations and cash flows for such fiscal period.

                                       25
<PAGE>
 
     (h)  Since June 30, 1997 there has been no material adverse change in
the business, financial position or results of operations of WSG and its
Consolidated Subsidiaries, considered as a whole.

     SECTION 4.05. Litigation. Except as disclosed in the notes to the
financial statements referred to in Section 4.04(a), there is no action, suit or
proceeding pending against, or to the knowledge of the Obligors threatened
against or affecting, any Relevant Party or any of their respective Subsidiaries
before any court or arbitrator or any governmental body, agency or official in
which there is a reasonable likelihood of an adverse decision which could
materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Borrower and its Consolidated
Subsidiaries, considered as a whole, or which in any manner draws into question
the validity of any Financing Document.

     SECTION 4.06. ERISA. (a) Each member of the Borrower's ERISA Group has
fulfilled its obligations under the minimum funding standards of ERISA and the
Internal Revenue Code with respect to each Plan and is in compliance in all
material respects with the presently applicable provisions of ERISA and the
Internal Revenue Code with respect to each Plan. No member of the ERISA Group
has (i) sought a waiver of the minimum funding standard under Section 412 of the
Internal Revenue Code in respect of any Plan, (ii) failed to make any
contribution or payment to any Plan or Multiemployer Plan or in respect of any
Benefit Arrangement, or made any amendment to any Plan or Benefit Arrangement,
which has resulted or could result in the imposition of a Lien or the posting of
a bond or other security under ERISA or the Internal Revenue Code or (iii)
incurred any liability under Title IV or ERISA other than a liability to the
PBGC for premiums under Section 4007 of ERISA.

     (b)  Neither the Guarantor, nor any member of its ERISA Group, maintains or
contributes to, or has within the previous six years (whether or not while a
member of its current ERISA Group) maintained or contributed to, or been
required to maintain or been jointly and severally liable for contributions to,
or liability upon withdrawal from, any plan or arrangement subject to (i) the
minimum funding standards of ERISA and the Internal Revenue Code, (ii) Part 3 of
Subtitle B of Title I of ERISA or (iii) Title IV of ERISA.

     SECTION 4.07. Taxes. The Guarantor and its Subsidiaries have filed all
income tax returns and all other material tax returns which are required to be
filed by them and have paid all taxes due pursuant to such returns or pursuant
to any assessment received by the Guarantor or any Subsidiary. The charges,
accruals and reserves on the books of the Guarantor and its Subsidiaries in
respect of taxes or other governmental charges are, in the opinion of the
Guarantor, adequate.

                                       26
<PAGE>
 
     SECTION 4.08. Not an Investment Company. No Relevant Party is an
"INVESTMENT COMPANY" within the meaning of the Investment Company Act of 1940,
as amended.

     SECTION 4.09. Full Disclosure. All written information heretofore
furnished by the Obligors to the Administrative Agent or any Bank for purposes
of or in connection with this Agreement or any transaction contemplated hereby
is, and all such information hereafter furnished by the Obligors to the
Administrative Agent or any Bank will be, true and accurate in all material
respects on the date as of which such information is stated or certified. The
Obligors have disclosed to the Banks in writing any and all facts which
materially and adversely affect or may affect (to the extent the Obligors can
now reasonably foresee) the business, operations or financial condition of any
Relevant Party and its Consolidated Subsidiaries, taken as a whole, or the
ability of any Relevant Party to perform its obligations under the Financing
Documents.

     SECTION 5.10. Compliance with Laws. The Guarantor and each Subsidiary
are in compliance, in all material respects, with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Guarantor and its Consolidated
Subsidiaries, considered as a whole.


                                   ARTICLE 3

                                   COVENANTS

     Each Obligor agrees that, so long as any Bank has any Commitment
hereunder or any amount payable under any Note remains unpaid:

     SECTION 5.01. Information. Each Obligor will deliver to each of the
Banks:

     (a) as soon as available and in any event within 90 days after the
end of each fiscal year of such Obligor, a consolidated balance sheet of such
Obligor and its Consolidated Subsidiaries as of the end of such fiscal year and
the related consolidated statements of operations, shareholders' equity and cash
flows for such fiscal year, setting forth in each case in comparative form the
figures for the

                                       27
<PAGE>
 
previous fiscal year, all reported on in a manner acceptable to the Securities
and Exchange Commission or otherwise reasonably acceptable to the Required Banks
by Coopers & Lybrand LLP or other independent public accountants of nationally
recognized standing;

     (b) as soon as available and in any event within 45 days after the end of
each of the first three quarters of each fiscal year of such Obligor, a
consolidated balance sheet of such Obligor and its Consolidated Subsidiaries as
of the end of such quarter and the related consolidated statements of operations
and cash flows for such quarter and for the portion of such Obligor's fiscal
year ended at the end of such quarter, setting forth in the case of such
statements of operations and cash flows in comparative form the figures for the
corresponding quarter and the corresponding portion of such Obligor's previous
fiscal year, all certified (subject to normal year-end adjustments) as to
fairness of presentation, generally accepted accounting principles and
consistency by the chief financial officer or the chief accounting officer of
such Obligor;

     (c)  simultaneously with the delivery of each set of financial statements
referred to in clauses (a) and (b) above, a certificate of the chief financial
officer or the chief accounting officer of such Obligor (i) setting forth in
reasonable detail the calculations required to establish whether such Obligor
was in compliance with the requirements of Article 5 on the date of such
financial statements and (ii) stating whether any Default exists on the date of
such certificate and, if any Default then exists, setting forth the details
thereof and the action which such Obligor is taking or proposes to take with
respect thereto;

     (d)  within five days after any executive officer of an Obligor obtains
knowledge of any Default, if such Default is then continuing, a certificate of
the chief financial officer or the chief accounting officer of such Obligor
setting forth the details thereof and the action which such Obligor is taking or
proposes to take with respect thereto;

     (e)  promptly upon the mailing thereof to the shareholders of the Guarantor
generally, copies of all financial statements, reports and proxy statements so
mailed;

     (f)  promptly upon the filing thereof, copies of all registration
statements (other than the exhibits thereto and any registration statements on
Form S-8 or its equivalent) and reports on Forms 10-K, 10-Q and 8-K (or their
equivalents) which the Guarantor shall have filed with the Securities and
Exchange Commission;

                                       28
<PAGE>
 
     (g)  as soon as available and in any event within 20 days after submission,
each annual or quarterly statutory statement of each Material Insurance Company
in the form submitted to its principal insurance regulator;

     (h)  as soon as available and in any event within 120 days after the end of
each fiscal year of WSG, a consolidated balance sheet of WSG and its
Consolidated Subsidiaries as of the end of such fiscal year and the related
consolidated statements of income and changes in financial position for such
fiscal year, setting forth in each case in comparative form the figures for the
previous fiscal year, all reported on by the independent public accountants
which reported on the financial statements referred to in clause (a) above;

     (i)  promptly after any executive officer of an Obligor obtains knowledge
thereof, (i) a copy of any notice from any regulatory authority in any
jurisdiction material to the business of such Material Insurance Company of the
revocation, the suspension or the placing of any restriction or condition on the
registration or license as an insurer of any Material Insurance Company or of
the institution of any proceeding or investigation which could result in any
such revocation, suspension or placing of such a restriction or condition, (ii)
copies of any correspondence by, to or concerning any Material Insurance Company
relating to an investigation conducted by any regulatory authority in any
jurisdiction material to the business of such Material Insurance Company,
whether pursuant to Section 132 of the Bermuda Companies Law or otherwise, (iii)
a copy of any notice of or requesting or otherwise relating to the winding up or
any similar proceeding of or with respect to, or questioning in any material
respect the financial soundness of, any Material Insurance Company, and (iv) a
copy of any notice of the imposition of, or any modification to, any restriction
on the payment of dividends to the Borrower by any of its Subsidiaries (directly
or indirectly); and

     (j)  from time to time such additional information regarding the financial
position, results of operations or business of such Obligor or any of its
Subsidiaries as the Administrative Agent, at the request of any Bank, may
reasonably request from time to time.

     SECTION 5.02.  Payment of Obligations.  The Guarantor will pay and
discharge, and will cause each Subsidiary to pay and discharge, at or before
maturity, all their respective material obligations and liabilities, including,
without limitation, tax liabilities, except where the same may be contested in
good faith by appropriate proceedings, and will maintain, and will cause each
Subsidiary to maintain, in accordance with generally accepted accounting
principles, appropriate reserves for the accrual of any of the same.

                                       29
<PAGE>
 
     SECTION 5.03.  Maintenance of Property; Insurance.  (a) The Guarantor will
keep, and will cause each Subsidiary to keep, all property useful and necessary
in its business in good working order and condition, ordinary wear and tear
excepted.

     (b)  The Guarantor will maintain, and will cause each Subsidiary to
maintain, physical damage insurance on all real and personal property on an all
risks basis (including the perils of flood and quake), covering the repair and
replacement cost of all such property and consequential loss coverage for
business interruption and extra expense. The Guarantor will deliver to the Banks
(i) upon request of any Bank through the Administrative Agent from time to time,
full information as to the insurance carried.

     SECTION 5.04.  Conduct of Business and Maintenance of Existence.  The
Guarantor will continue, and will cause each Subsidiary to continue, to engage
in business of the same general type as now conducted by the Guarantor and its
Subsidiaries, and will preserve, renew and keep in full force and effect, and
will cause each Subsidiary to preserve, renew and keep in full force and effect,
their respective existence and their respective rights, privileges and
franchises necessary or desirable in the normal conduct of business; provided
that nothing in this Section 5.04 shall prohibit (i) the merger of a Subsidiary
(other than a Relevant Party) into the Guarantor or the merger or consolidation
of a Subsidiary (other than a Relevant Party) with or into another Person if the
corporation surviving such consolidation or merger is a Subsidiary and if, in
each case, after giving effect thereto, no Default shall have occurred and be
continuing, (ii) any merger of a Relevant Party permitted by Section 5.11 or
(iii) the termination of the corporate existence of any Subsidiary (other than a
Relevant Party) if the Guarantor in good faith determines that such termination
is in the best interest of the Guarantor and is not materially disadvantageous
to the Banks.

     SECTION 5.05.  Compliance with Laws.  The Guarantor will comply, and cause
each Subsidiary to comply, in all material respects with all applicable laws,
ordinances, rules, regulations, guidelines and other requirements of
governmental authorities except where the necessity of compliance therewith is
contested in good faith by appropriate proceedings and any reserves required
under generally accepted accounting principles with respect thereto have been
established and except where any such failure could not reasonably be expected
to materially adversely affect the business, consolidated financial position or
consolidated results of operations of the Guarantor and its Consolidated
Subsidiaries, considered as a whole.

     SECTION 5.06.  Inspection of Property, Book and Records.  The Guarantor
will keep, and will cause each Subsidiary to keep, proper books of record and

                                       30
<PAGE>
 
account in accordance with generally accepted accounting principles in which
full, true and correct entries shall be made of all dealings and transactions in
relation to its business and activities; and will permit, and will cause each
Subsidiary to permit, representatives of any Bank at such Bank's expense to
visit and inspect any of their respective properties, to examine and make
abstracts from any of their respective books and records and to discuss their
respective affairs, finances and accounts with their respective officers,
employees and independent public accountants, all at such reasonable times and
as often as may reasonably be desired.

     SECTION 5.07.  Leverage.  Consolidated Debt will at no time exceed 35%
of Consolidated Tangible Net Worth.

     SECTION 5.08.  Debt.  (a) The Guarantor will not permit any of its
Subsidiaries to create, assume or suffer to exist any Debt, except (i) Debt
under the Related Documents, (ii) Debt owing to the Guarantor or a Wholly-Owned
Consolidated Subsidiary of the Guarantor, (iii) Debt of Tripar Partnership, a
Bermuda general partnership, owing to other Subsidiaries or Debt of such other
Subsidiaries owing to Tripar Partnership, (iv) Debt in respect of letters of
credit issued in the ordinary course of business, (v) Debt created by exercise
of overdraft privileges on a basis not more frequent than once each calendar
month for not more than five Euro-Dollar Business Days in an amount not to
exceed $50,000,000 in the aggregate at any one time, (vi) subordinated Debt of
the Borrower owing to ACE Insurance under the Subordinated Loan Agreement, (vii)
Debt in an amount not to exceed $70,000,000 incurred in connection with the
development by the Guarantor and/or any of its Subsidiaries of the "Bermudiana
Site" in Hamilton, Bermuda, and (viii) Debt not permitted by the foregoing
clauses of this Section in an aggregate principal amount not to exceed
$20,000,000 at any time outstanding.

     (b)  The Borrower will not, and will not permit any of its Subsidiaries to,
create, assume or suffer to exist any Debt, except (i) Debt under the Financing
Documents, (ii) Debt under the Subordinated Loan Agreement owing to ACE
Insurance, (iii) Debt owing to ACE Limited subordinated to the same extent as
Debt under the Subordinated Loan Agreement and (iv) Debt owing to the Borrower
or a Wholly-Owned Consolidated Subsidiary of the Borrower.

     SECTION 5.09.  Minimum Tangible Net Worth.  Consolidated Tangible Net Worth
will at no time be less than (i) $1,400,000,000 plus (ii) 25% of Consolidated
Net Income for each fiscal quarter of the Guarantor ended after December 31,
1997 and on or prior to such date of determination and for which such
Consolidated Net Income is positive (but with no deduction on account of any
fiscal quarter for which Consolidated Net Income is negative) plus (iii) 50%

                                       31
<PAGE>
 
of the aggregate amount by which Consolidated Tangible Net Worth shall have been
increased by reason of the issuance and sale after the Effective Date and on or
prior to such date of determination of any capital stock or the conversion or
exchange of any Debt of the Guarantor into or with capital stock of the
Guarantor consummated after the Effective Date and on or prior to such date of
determination.

     SECTION 5.10.  Negative Pledge.  Neither the Guarantor nor any Subsidiary
will create, assume or suffer to exist any Lien on any asset now owned or
hereafter acquired by it, except:

     (a)  Liens existing on the date of this Agreement securing Debt outstanding
on the date of this Agreement in an aggregate principal or face amount not
exceeding $25,000,000;

     (b)  any Lien existing on any asset of any corporation at the time such
corporation becomes a Subsidiary and not created in contemplation of such event;

     (c)  any Lien on any asset securing Debt incurred or assumed for the
purpose of financing all or any part of the cost of acquiring such asset,
provided that such Lien attaches to such asset concurrently with or within 90
days after the acquisition thereof;

     (d)  any Lien on any asset of any corporation existing at the time such
corporation is merged or consolidated with or into the Guarantor or a Subsidiary
and not created in contemplation of such event;

     (e)  any Lien existing on any asset prior to the acquisition thereof by the
Guarantor or a Subsidiary and not created in contemplation of such acquisition;

     (f)  any Lien arising out of the refinancing, extension, renewal or
refunding of any Debt secured by any Lien permitted by any of the foregoing
clauses of this Section, provided that such Debt is not increased and is not
secured by any additional assets;

     (g)  Liens arising in the ordinary course of its business which (i) do not
secure Debt or Derivatives Obligations, (ii) do not secure any obligation in an
amount exceeding $25,000,000 and (iii) do not in the aggregate materially
detract from the value of its assets or materially impair the use thereof in the
operation of its business;

                                       32
<PAGE>
 
     (h)  Liens on cash and cash equivalents securing Derivatives Obligations,
provided that the aggregate amount of cash and cash equivalents subject to such
Liens may at no time exceed $25,000,000;

     (i)  Liens securing obligations in respect of letters of credit issued
pursuant to any of the Related Documents; and

     (j)  Liens not otherwise permitted by the foregoing clauses of this Section
securing Debt in an aggregate principal or face amount at any date not to exceed
10% of Consolidated Tangible Net Worth.

     SECTION 5.11.  Consolidations,  Mergers and Sales of Assets. No Relevant
Party will (i) consolidate with or merge into any other Person or (ii) sell,
lease or otherwise transfer, directly or indirectly, all or any substantial part
of its assets to any other Person; provided that if both immediately before and
after giving effect thereto no Default shall have occurred and be continuing,
then (A) ACE Insurance may merge or consolidate with any other Person so long as
the surviving entity is the Guarantor or a Wholly-Owned Consolidated Subsidiary
of the Guarantor and, if ACE Insurance is not the surviving entity, such
surviving entity shall have assumed the obligations of ACE Insurance under the
Subordinated Loan Agreement pursuant to an instrument in form and substance
reasonably satisfactory to the Required Banks and shall have delivered such
opinions of counsel with respect thereto as the Administrative Agent may
reasonably request and (B) the Borrower and the Guarantor may each merge with
another Person (other than each other) so long as the Borrower or the Guarantor,
as the case may be, is the surviving entity.

     SECTION 5.12.  Use of Proceeds.  The proceeds of the Loans made under this
Agreement will be used by the Borrower to finance the WSG Acquisition. None of
such proceeds will be used, directly or indirectly, for the purpose, whether
immediate, incidental or ultimate, of buying or carrying any "margin stock"
within the meaning of Regulation U.

     SECTION 5.13.  ERISA.  Neither the Guarantor nor any member of its ERISA
Group will maintain or contribute to, or become obligated to maintain or become
jointly and severally liable for contributions to, or have liability upon
withdrawal from, any plan or arrangement subject to (i) the minimum funding
standards of ERISA and the Internal Revenue Code, (ii) Part 3 of Subtitle B of
Title I of ERISA or (iii) Title IV of ERISA.

     SECTION 5.14.  Restricted Payments.  Neither the Borrower nor any
Subsidiary of the Borrower will declare or make any Restricted Payment.

                                       33
<PAGE>
 
     SECTION 5.15.  Investments; Acquisitions.  (a) Neither the Borrower nor any
Subsidiary of the Borrower (other than a Material Insurance Company) will hold,
make or acquire any Investment in any Person other than:

          (i)   Investments existing on the date hereof in Persons which are
     Subsidiaries on the date hereof and, subject to the limitations of
     subsection (b), additional Investments on or after the date hereof in such
     Subsidiaries and in Subsidiaries formed or acquired after the date hereof ;

          (ii)  Temporary Cash Investments; and

          (iii) loans and advances to the Borrower or a Wholly-Owned
     Consolidated Subsidiary of the Borrower.

     (b)  Except for the WSG Acquisition, the Borrower will not, and will not
permit any of its Subsidiaries to, make any Acquisitions; provided that the
Borrower and its Subsidiaries may make Acquisitions of or from a Person engaged
in the type of business conducted by the Borrower and other acquisitions of
assets used or useful in the conduct of the business of the Borrower and its
Subsidiaries.

     SECTION 5.16. Transactions with Affiliates.  The Borrower will not, and
will not permit any of its Subsidiaries to, directly or indirectly, pay any
funds to or for the account of, make any Investment in, lease, sell, transfer or
otherwise dispose of any assets, tangible or intangible, to, or participate in,
or effect, any transaction with, any Affiliate except on an arm's-length basis
on terms not materially less favorable to the Borrower or such Subsidiary than
could have been obtained from a third party who was not an Affiliate; provided
that the foregoing provisions of this Section shall not prohibit (i) the
transactions to be effected pursuant to the Financing Documents or (ii) the
declaration or payment of any lawful dividend or other payment ratably in
respect of all of its capital stock of the relevant class so long as, after
giving effect thereto, no Default shall have occurred and be continuing.

     SECTION 5.17.  No Modification of Documents Without Consent.  The Borrower
will not, without the prior written consent of the Required Banks, consent to or
solicit any amendment or supplement to, or any waiver or other modification of,
the Subordinated Loan Agreement or any subordination agreement contemplated by
Section 5.08(b)(iii).

     SECTION 5.18.  Debt Service Coverage Ratio. At the end of each fiscal
quarter of the Borrower, commencing with the first quarter after the Borrowing
Date, the Debt Service Coverage Ratio will not be less than 1.20:1.

                                       34
<PAGE>
 
                                   ARTICLE 6
                                   DEFAULTS

     SECTION 6.01.  Events of Default.  If one or more of the following events
("EVENTS OF DEFAULT") shall have occurred and be continuing:

     (a)  the Borrower shall fail to pay when due any principal of any Loan or
shall fail to pay within five Business Days of the due date thereof any interest
on any Loan, any fees or any other amount payable hereunder or the Guarantor
shall fail to pay when due any such principal, interest, fees or other amount
payable hereunder; provided that, for purposes of this Section 6.01(a), no such
payment default by the Borrower shall be continuing if the Guarantor pays the
amount thereof at the time and otherwise in the manner provided in Article 9;

     (b)  any Obligor shall fail to observe or perform any covenant contained in
Sections 5.07 through 5.11, inclusive, 5.14 or 5.17; or ACE Insurance shall fail
to perform any of its obligations under the Subordinated Loan Agreement;

     (c)  any Obligor shall fail to observe or perform any covenant or agreement
contained in the Financing Documents (other than those covered by clause (a) or
(b) above) for 30 days after notice thereof has been given to the Obligors by
the Administrative Agent at the request of any Bank;

     (d)  any representation, warranty, certification or statement made by any
Obligor in this Agreement or in any certificate, financial statement or other
document delivered pursuant to this Agreement shall prove to have been incorrect
in any material respect when made (or deemed made);

     (e)  the Guarantor or any Subsidiary shall fail to make any payment in
respect of any Material Financial Obligations when due or within any applicable
grace period;

     (f)  any event or condition shall occur which results in the acceleration
of the maturity of any Material Debt or enables (or, with the giving of notice
or lapse of time or both, would enable) the holder of such Debt or any Person
acting on such holder's behalf to accelerate the maturity thereof; or, without
limiting the foregoing, any "Event of Default" (as defined in any of the other
Related Documents) shall occur;

     (g)  (i) (x) a resolution or other similar action is passed authorizing the
voluntary winding up of the Guarantor or any other similar action with respect
to the Guarantor or a petition is filed for the winding up of the Guarantor or
the taking of any other similar action with respect to the Guarantor in the
Grand Court

                                       35
<PAGE>
 
of the Cayman Islands or (y) any corporate action is taken authorizing the
winding up, the liquidation, any arrangement or the taking of any other similar
action of or with respect to any Subsidiary of the Guarantor or authorizing any
corporate action to be taken to facilitate any such winding up, liquidation,
arrangement or other similar action or any petition shall be filed seeking the
winding up, the liquidation, any arrangement or the taking of any other similar
action of or with respect to any Subsidiary of the Guarantor by the Registrar of
Companies in Bermuda, one or more holders of insurance policies or reinsurance
certificates issued by any Subsidiary of the Guarantor or by any other Person or
Persons or any petition shall be presented for the winding up of any Subsidiary
of the Guarantor to a court of Bermuda as provided under the Bermuda Companies
Law and in either such case such petition shall remain undismissed and unstayed
for a period of 60 days or any creditors' or members' voluntary winding up of
any Subsidiary of the Guarantor as provided under the Bermuda Companies Law
shall be commenced or any receiver shall be appointed by a creditor of any
Subsidiary of the Guarantor or by a court of Bermuda on the application of a
creditor of any Subsidiary of the Guarantor as provided under any instrument
giving rights for the appointment of a receiver;

     (ii)  a decree or order or a court or agency or supervisory authority
having jurisdiction in the premises for the appointment of a trustee, receiver,
liquidator, custodian or other similar official in any insolvency proceedings,
readjustment of debt, marshalling of assets and liabilities or similar
proceedings affecting such Subsidiary or substantially all of its assets, or for
the winding-up or liquidation of its affairs, shall have been entered, or a
proceeding shall be commenced by any Person seeking the rehabilitation,
liquidation, dissolution or conservation of the assets of any Subsidiary of the
Guarantor or any substantial part thereof or any similar remedy and such
proceedings shall remain undismissed and unstayed for a period of 60 days
(including, in either case, without limitation, the commencement of proceedings
for the rehabilitation or liquidation of such Subsidiary in accordance with the
applicable provisions of Chapter 37 of the Georgia Insurance Code, Article 74 of
the New York Insurance Law or Chapter 21 of the Texas Insurance Code);

     (iii) the Guarantor or any Subsidiary of the Guarantor shall commence a
voluntary case or other proceeding seeking liquidation, reorganization or other
relief with respect to itself or its debts under any bankruptcy, insolvency or
other similar law now or hereafter in effect or seeking the appointment of a
trustee, receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, or shall consent to any such relief or to the
appointment of or taking possession by any such official in an involuntary case
or other proceeding commenced against it, or shall make a general assignment for
the benefit of

                                       36
<PAGE>
 
creditors, or shall fail generally to pay its debts as they become due, or shall
take any corporate action to authorize any of the foregoing;

     (iv) an involuntary case or other proceeding shall be commenced against the
Guarantor or any Subsidiary of the Guarantor seeking liquidation, reorganization
or other relief with respect to it or its debts under any bankruptcy, insolvency
or other similar law now or hereafter in effect or seeking the appointment of a
trustee, receiver, liquidator, custodian or other similar official of it or any
substantial part of its property, and such involuntary case or other proceeding
shall remain undismissed and unstayed for a period of 60 days; or an order for
relief shall be entered against the Guarantor or any Subsidiary of the Guarantor
under the United States federal bankruptcy laws as now or hereafter in effect;
or

     (v)  the rights, privileges or franchises of any Subsidiary of the
Guarantor to do business shall be declared forfeited by any governmental
authority or any court of competent jurisdiction where the loss of such rights,
privileges or franchises would have a material adverse effect on the ability of
such Subsidiary to meet its obligations under any of the Financing Documents;

     (h)  a judgment or order for the payment of money in excess of $25,000,000
shall be rendered against the Guarantor or any Subsidiary of the Guarantor and
such judgment or order shall continue unsatisfied and unstayed for a period of
45 days;

     (i)  any person or group of persons (within the meaning of Section 13 or 14
of the Securities Exchange Act of 1934, as amended) shall have acquired
beneficial ownership (within the meaning of Rule 13d-3 promulgated by the
Securities and Exchange Commission under said Act) of 30% or more of the
outstanding shares of voting stock of the Guarantor; or, during any period of 12
consecutive calendar months, individuals who were directors of the Guarantor on
the first day of such period shall cease to constitute a majority of the board
of directors of the Guarantor; or either the Borrower or ACE Insurance shall
cease to be a Wholly-Owned Consolidated Subsidiary of the Guarantor;

     (j)  any court or arbitrator or any governmental body, agency or official
which has jurisdiction in the matter shall decide, rule or order that any
provision of any of the Financing Documents is invalid or unenforceable in any
material respect, or any Relevant Party shall so assert in writing;

     (k)  the registration or license of any Subsidiary of the Guarantor as an
insurer shall be revoked, suspended or otherwise have restrictions or conditions
placed upon it unless, in the case of the placing of any such restrictions or

                                       37
<PAGE>
 
conditions, such restrictions or conditions could not have a material adverse
effect on the interests of the Administrative Agent and the Banks under the
Financing Documents; or

     (l)  any member of the Borrower's ERISA Group shall fail to pay when due an
amount or amounts aggregating in excess of $25,000,000 which it shall have
become liable to pay under Title IV of ERISA; or notice of intent to terminate a
Material Plan in a distress termination shall be filed under Title IV of ERISA
by any member of the Borrower's ERISA Group, any plan administrator or any
combination of the foregoing; or the PBGC shall institute proceedings under
Section 4042 of Title IV of ERISA to terminate, to impose liability on
Borrower's ERISA Group for an amount or amounts aggregating in excess of
$25,000,000 (other than for premiums under Section 4007 of ERISA); or there
shall occur a complete or partial withdrawal from, or a default, within the
meaning of Section 4219(c)(5) of ERISA, with respect to, one or more
Multiemployer Plans which causes one or more members of the Borrower's ERISA
Group to incur a current payment obligation in excess of $25,000,000 in the
aggregate;

then, and in every such event, the Administrative Agent shall (i) if requested
by Banks having more than 50% in aggregate amount of the Commitments (if still
in existence), by notice to the Borrower terminate the Commitments and they
shall thereupon terminate, and (ii) if requested by Banks holding Notes
evidencing more than 50% in aggregate principal amount of the Loans, by notice
to the Borrower declare the Notes (together with accrued interest thereon) to
be, and the Notes (together with accrued interest thereon) shall thereupon
become, immediately due and payable without presentment, demand, protest or
other notice of any kind, all of which are hereby waived by the Obligors;
provided that in the case of any of the Events of Default specified in clause
(g) above with respect to any Obligor, without any notice to any Obligor or any
other act by the Administrative Agent or the Banks, the Commitments (if still in
existence) shall thereupon terminate and the Notes (together with accrued
interest thereon) shall become immediately due and payable without presentment,
demand, protest or other notice of any kind, all of which are hereby waived by
the Obligors.

     SECTION 6.02. Notice of Default.  The Administrative Agent shall give
notice to the Obligors under Section 6.01(c) promptly upon being requested to do
so by any Bank and shall thereupon notify all the Banks thereof.

                                       38
<PAGE>
 
                                   ARTICLE 7
                                  THE AGENTS

     SECTION 7.01.  Appointment and Authorization.  Each Bank irrevocably
appoints and authorizes the Administrative Agent to take such action as agent on
its behalf and to exercise such powers under the Financing Documents as are
delegated to the Administrative Agent by the terms hereof and thereof, together
with all such powers as are reasonably incidental thereto.

     SECTION 7.02.  Administrative Agent and Affiliates.  Morgan Guaranty Trust
Company of New York shall have the same rights and powers under this Agreement
as any other Bank and may exercise or refrain from exercising the same as though
it were not the Administrative Agent, and Morgan Guaranty Trust Company of New
York and its affiliates may accept deposits from, lend money to, and generally
engage in any kind of business with the Borrower or any Subsidiary or affiliate
of the Borrower as if it were not the Administrative Agent hereunder.

     SECTION 7.03.  Action by Administrative Agent. The obligations of the
Administrative Agent under this Agreement are only those expressly set forth
herein. Without limiting the generality of the foregoing, the Administrative
Agent shall not be required to take any action with respect to any Default,
except as expressly provided in Article 6 and in the Pledge Agreement.

     SECTION 7.04.  Consultation with Experts.  The Administrative Agent may
consult with legal counsel (who may be counsel for an Obligor), independent
public accountants and other experts selected by it and shall not be liable for
any action taken or omitted to be taken by it in good faith in accordance with
the advice of such counsel, accountants or experts.

     SECTION 7.05.  Liability of Administrative Agent.   Neither the
Administrative Agent nor any of its affiliates nor any of their respective
directors, officers, agents or employees shall be liable for any action taken or
not taken by it in connection herewith (i) with the consent or at the request of
the Required Banks (or such different number of Banks as any provision hereof
expressly requires for such consent or request) or (ii) in the absence of its
own gross negligence or willful misconduct. Neither the Administrative Agent nor
any of its affiliates nor any of their respective directors, officers, agents or
employees shall be responsible for or have any duty to ascertain, inquire into
or verify (i) any statement, warranty or representation made in connection with
the Financing Documents or any borrowing hereunder; (ii) the performance or
observance of any of the covenants or agreements of any Obligor; (iii) the
satisfaction of any condition specified in Article 3, except receipt of items
required to be delivered to the Administrative Agent; or (iv) the validity,
effectiveness or genuineness of any Financing

                                       39
<PAGE>
 
Document or any other instrument or writing furnished in connection herewith.
The Administrative Agent shall not incur any liability by acting in reliance
upon any notice, consent, certificate, statement, or other writing (which may be
a bank wire, telex, facsimile transmission or similar writing) believed by it to
be genuine or to be signed by the proper party or parties.

     SECTION 7.06.  Indemnification.  Each Bank shall, ratably in accordance
with its Commitment, indemnify the Administrative Agent, its affiliates and
their respective directors, officers, agents and employees (to the extent not
reimbursed by the Obligors) against any cost, expense (including counsel fees
and disbursements), claim, demand, action, loss or liability (except such as
result from such indemnitees' gross negligence or willful misconduct) that such
indemnitees may suffer or incur in such capacity in connection with the
Financing Documents or any action taken or omitted by such indemnitees hereunder
or thereunder.

     SECTION 7.07.  Credit Decision.  Each Bank acknowledges that it has,
independently and without reliance upon any Agent or any other Bank, and based
on such documents and information as it has deemed appropriate, made its own
credit analysis and decision to enter into this Agreement. Each Bank also
acknowledges that it will, independently and without reliance upon any Agent or
any other Bank, and based on such documents and information as it shall deem
appropriate at the time, continue to make its own credit decisions in taking or
not taking any action under this Agreement.

     SECTION 7.08.  Successor Administrative Agent. The Administrative Agent may
resign at any time by giving notice thereof to the Banks and the Borrower. Upon
any such resignation, the Required Banks shall have the right to appoint a
successor Administrative Agent, which successor Administrative Agent shall be
reasonably acceptable to the Borrower. If no successor Administrative Agent
shall have been so appointed by the Required Banks, and shall have accepted such
appointment, within 30 days after the retiring Administrative Agent gives notice
of resignation, then the retiring Administrative Agent may, on behalf of the
Banks, appoint a successor Administrative Agent, which shall be a commercial
bank organized or licensed under the laws of the United States of America or of
any State thereof and having a combined capital and surplus of at least
$100,000,000. Upon the acceptance of its appointment as Administrative Agent
hereunder by a successor Administrative Agent, such successor Administrative
Agent shall thereupon succeed to and become vested with all the rights and
duties of the retiring Administrative Agent, and the retiring Administrative
Agent shall be discharged from its duties and obligations hereunder. After any
retiring Administrative Agent's resignation hereunder as Administrative Agent,
the provisions of this Article shall inure to its benefit as to any actions
taken or omitted to be taken by it while it was Administrative Agent.

                                       40
<PAGE>
 
     SECTION 7.09.  Administrative Agent's Fee. The Borrower shall pay to the
Administrative Agent for its own account fees in the amounts and at the times
previously agreed upon between the Borrower and the Administrative Agent.

     SECTION 7.10.  Other Agents.  Nothing contained in this Agreement shall be
construed to impose any obligation or duty whatsoever on either Syndication
Agent, on the Documentation Agent, on the Managing Agent or on any Co-Agent, in
its capacity as such an Agent.

                                   ARTICLE 8
                            CHANGE IN CIRCUMSTANCES

     SECTION 8.01.  Basis for Determination Interest Rate Inadequate or
Unfair.  If on or prior to the first day of any Interest Period:

     (a)  the Administrative Agent is advised by the Reference Banks that
deposits in dollars (in the applicable amounts) are not being offered to the
Reference Banks in the London interbank market for such Interest Period, or

     (b)  Banks having 50% or more of the aggregate amount of the Euro-Dollar
Loans advise the Administrative Agent that the London Interbank Offered Rate as
determined by the Administrative Agent will not adequately and fairly reflect
the cost to such Banks of funding their Euro-Dollar Loans for such Interest
Period,

the Administrative Agent shall forthwith give notice thereof to the Borrower and
the Banks, whereupon until the Administrative Agent notifies the Borrower that
the circumstances giving rise to such suspension no longer exist (i) the
obligations of the Banks to make Euro-Dollar Loans, or to continue or convert
outstanding Loans as or into Euro-Dollar Loans, shall be suspended and (ii) each
outstanding Euro-Dollar Loan shall be converted into a Base Rate Loan on the
last day of the then current Interest Period applicable thereto.

     SECTION 8.02.  Illegality.  If, on or after the date of this Agreement, the
adoption of any applicable law, rule or regulation, or any change in any
applicable law, rule or regulation, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by any Bank (or its Euro-Dollar Lending Office) with any request or directive
(whether or not having the force of law) of any such authority, central bank or
comparable agency shall make it unlawful or impossible for any Bank (or its
Euro-Dollar

                                       41
<PAGE>
 
Lending Office) to make, maintain or fund its Euro-Dollar Loans and such Bank
shall so notify the Administrative Agent, the Administrative Agent shall
forthwith give notice thereof to the other Banks and the Borrower, whereupon
until such Bank notifies the Borrower and the Administrative Agent that the
circumstances giving rise to such suspension no longer exist, the obligation of
such Bank to make Euro-Dollar Loans, or to continue or convert outstanding Loans
as or into Euro-Dollar Loans, shall be suspended. Before giving any notice to
the Administrative Agent pursuant to this Section, such Bank shall designate a
different Euro-Dollar Lending Office if such designation will avoid the need for
giving such notice and will not, in the judgment of such Bank, be otherwise
disadvantageous to such Bank. If such notice is given, each Euro-Dollar Loan of
such Bank then outstanding shall be converted to a Base Rate Loan either (a) on
the last day of the then current Interest Period applicable to such Euro-Dollar
Loan if such Bank may lawfully continue to maintain and fund such Loan as a 
Euro-Dollar Loan to such day or (b) immediately if such Bank shall determine
that it may not lawfully continue to maintain and fund such Loan as a Euro-
Dollar Loan to such day.

     SECTION 8.03.  Increased Cost and Reduced Return.  (a) If on or after the
date hereof, the adoption of any applicable law, rule or regulation, or any
change in any applicable law, rule or regulation, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or compliance by any Bank (or its Applicable Lending Office) with any
request or directive (whether or not having the force of law) of any such
authority, central bank or comparable agency shall impose, modify or deem
applicable any reserve (including, without limitation, any such requirement
imposed by the Board of Governors of the Federal Reserve System, but excluding
with respect to any Euro-Dollar Loan any such requirement with respect to which
such Bank is entitled to compensation during the relevant Interest Period under
Section 2.14), special deposit, insurance assessment or similar requirement
against assets of, deposits with or for the account of, or credit extended by,
any Bank (or its Applicable Lending Office) or shall impose on any Bank (or its
Applicable Lending Office) or on the London interbank market any other condition
affecting its Euro-Dollar Loans, its Note or its obligation to make Euro-Dollar
Loans and the result of any of the foregoing is to increase the cost to such
Bank (or its Applicable Lending Office) of making or maintaining any Euro-Dollar
Loan, or to reduce the amount of any sum received or receivable by such Bank (or
its Applicable Lending Office) under this Agreement or under its Note with
respect thereto, by an amount deemed by such Bank to be material, then, within
15 days after demand by such Bank (with a copy to the Administrative Agent), the
Borrower shall pay to such Bank such additional amount or amounts as will
compensate such Bank for such increased cost or reduction.

                                       42
<PAGE>
 
     (b)  If any Bank shall have determined that, after the date hereof, the
adoption of any applicable law, rule or regulation regarding capital adequacy,
or any change in any such law, rule or regulation, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or any request or directive regarding capital adequacy (whether or not
having the force of law) of any such authority, central bank or comparable
agency, has or would have the effect of reducing the rate of return on capital
of such Bank (or its Parent) as a consequence of such Bank's obligations
hereunder to a level below that which such Bank (or its Parent) could have
achieved but for such adoption, change, request or directive (taking into
consideration its policies with respect to capital adequacy) by an amount deemed
by such Bank to be material, then from time to time, within 15 days after demand
by such Bank (with a copy to the Administrative Agent), the Borrower shall pay
to such Bank such additional amount or amounts as will compensate such Bank (or
its Parent) for such reduction.

     (c)  Each Bank will promptly notify the Borrower and the Administrative
Agent of any event of which it has knowledge, occurring after the date hereof,
which will entitle such Bank to compensation pursuant to this Section and will
designate a different Applicable Lending Office if such designation will avoid
the need for, or reduce the amount of, such compensation and will not, in the
judgment of such Bank, be otherwise disadvantageous to such Bank. A certificate
of any Bank claiming compensation under this Section and setting forth the
additional amount or amounts to be paid to it hereunder shall be conclusive in
the absence of manifest error. In determining such amount, such Bank may use any
reasonable averaging and attribution methods. Notwithstanding the foregoing
subsections 8.03(a) and 8.03(b) of this Section 8.03, the Borrower shall only be
obligated to compensate any Bank for any amount arising or accruing during (i)
any time or period commencing not more than 180 days prior to the date on which
such Bank notifies the Administrative Agent and the Borrower that it proposes to
demand such compensation and identifies to the Administrative Agent and the
Borrower the statute, regulation or other basis upon which the claimed
compensation is or will be based and (ii) any time or period during which
because of the retroactive application of such statute, regulation or other such
basis, such Bank did not know in good faith that such amount would arise or
accrue.

     SECTION 8.04.  Taxes. (a) Any and all payments by any Obligor hereunder
shall be made free and clear of and without deduction for any and all present or
future taxes, levies, imposts, deductions, charges or withholdings, and all
penalties, interest, expenses and similar liabilities with respect thereto,
excluding (i) in the case of each Bank and the Administrative Agent, taxes
imposed on its income, and franchise and similar taxes imposed on it, by the
jurisdiction under

                                       43
<PAGE>
 
the laws of which such Bank or the Administrative Agent, as the case may be,
shall be organized or any political subdivision thereof, (ii) in the case of
each Bank, taxes imposed on its income, and franchise and similar taxes imposed
on it, by the jurisdiction of such Bank's Applicable Lending Office or any
political subdivision thereof or in which such Bank's principal executive office
is located or any political subdivision thereof and (iii) any Taxes imposed as a
result of a change of such Bank's Applicable Lending Office to the extent such
Taxes would not have been imposed absent such change; provided however, that (x)
a change in such Bank's Applicable Lending Office to which the Obligor has
consented and (y) a change in such Bank's Applicable Lending Office as a result
of legal or regulatory restrictions shall not constitute a change for the
purposes of this Section 8.04 (all such non-excluded taxes, levies, imposts,
deductions, charges, withholdings and liabilities being hereinafter referred to
as "Taxes"). Each Obligor agrees that, if any Obligor shall be required by law
to deduct any Taxes from or in respect of any sum payable hereunder to any Bank
or the Administrative Agent, (A) the sum payable to such Bank or the
Administrative Agent shall be increased as may be necessary so that after making
all required deductions for Taxes (including deductions applicable to additional
sums payable under this Section 8.04), such Bank or the Administrative Agent, as
the case may be, shall receive an amount equal to the sum it would have received
had no such deductions been made, (B) such Obligor shall make such deductions
and (C) such Obligor shall pay the full amount deducted to the relevant taxing
authority or other authority in accordance with applicable law.

     (b)  In addition, each Obligor agrees to pay any present or future stamp or
documentary taxes or any other excise or property taxes, charges or similar
levies which shall arise from any payment made under, or from the execution,
delivery or registration of, or otherwise with respect to, this Agreement or any
Note (all such taxes, charges or levies being hereinafter referred to as "Other
Taxes").

     (c)  Each Obligor agrees to indemnify each Bank and the Administrative
Agent for the full amount of Taxes or Other Taxes (including any Taxes or Other
Taxes imposed on amounts payable under this Section 8.04) paid by such Bank or
the Administrative Agent or any penalties, interest, expenses and similar
liabilities arising therefrom or with respect thereto, whether or not such Taxes
or Other Taxes were correctly or legally asserted provided that such Bank has
acted in good faith with respect to such Taxes or Other Taxes and that such Bank
reasonably cooperates with the Obligors in challenging such Taxes or Other
Taxes. Each indemnification under this paragraph (c) shall be made within 30
days from the date such Bank or the Administrative Agent makes demand therefor.

     (d)  Each Bank organized under the laws of a jurisdiction outside the
United States, on or prior to the Borrowing Date in the case of each Bank listed
on

                                       44
<PAGE>
 
the signature pages hereof and on or prior to the date on which it becomes a
Bank in the case of each other Bank, and from time to time thereafter if
requested in writing by the Borrower (but only so long as such Bank remains
lawfully able to do so), shall provide the Borrower with Internal Revenue
Service form 1001 or 4224, as appropriate, or any successor form prescribed by
the Internal Revenue Service, certifying that such Bank is entitled to benefits
under an income tax treaty to which the United States is a party which reduces
the rate of withholding tax on payments of interest or certifying that the
income receivable pursuant to this Agreement is effectively connected with the
conduct of a trade or business in the United States. If the form provided by a
Bank at the time such Bank first becomes a party to this Agreement indicates a
United States interest withholding tax rate in excess of zero, withholding tax
at such rate shall be considered excluded from "Taxes" as defined in Section
8.04(a).

     (e)  Each Bank shall use reasonable efforts (consistent with legal and
regulatory restrictions) (x) to file any certificate or document or to furnish
any information as reasonably requested by any Obligor pursuant to any
applicable treaty, law, rule or regulation or (y) to designate a different
Lending Office if the making of such a filing, the furnishing of such
information or the designation of such other Lending Office would avoid the need
for or reduce the amount of any additional amounts payable by any Obligor
pursuant to this Section 8.04 and would not, in the reasonable judgment of such
Bank, be disadvantageous to such Bank. Notwithstanding the foregoing, it is
understood and agreed that nothing in this Section 8.04 shall interfere with the
rights of any Bank to conduct its fiscal or tax affairs in such manner as it
deems fit.

     (f)  Within 90 days after the date of any payment of Taxes, the Obligors
will furnish to the Administrative Agent notarized copies for each Bank of the
original receipt evidencing payment thereof. If no Taxes shall be payable in
respect of any payment under this Agreement, the Obligors will, upon the
reasonable request of the Administrative Agent, furnish to the Administrative
Agent a certificate in form reasonably acceptable to the Administrative Agent's
counsel confirming that such payment is exempt from or not subject to Taxes.

     (g)  For any period with respect to which a Bank has failed to provide the
Obligors with the appropriate form pursuant to Section 8.04(d) or 8.04(e)
(unless such failure is due to a change in treaty, law or regulation occurring
subsequent to the date on which such form originally was required to be
provided), such Bank shall not be entitled to indemnification under Section
8.04(a) or 8.04(b) with respect to Taxes imposed by the United States; provided
that if a Bank, which is otherwise exempt from or subject to a reduced rate of
withholding tax, becomes subject to Taxes because of its failure to deliver a
form required hereunder, the

                                       45
<PAGE>
 
Obligors shall take such steps as such Bank shall reasonably request to assist
such Bank to recover such Taxes.

     SECTION 8.05.  Base Rate Loans Substituted for Affected Fixed Rate
Loans.  If (i) the obligation of any Bank to make or to continue or convert
outstanding Loans as or to Euro-Dollar Loans has been suspended pursuant to
Section 8.02 or (ii) any Bank has demanded compensation under Section 8.03 or
8.04 with respect to its Euro-Dollar Loans and the Borrower shall, by at least
five Euro-Dollar Business Days' prior notice to such Bank through the
Administrative Agent, have elected that the provisions of this Section shall
apply to such Bank, then, unless and until such Bank notifies the Borrower that
the circumstances giving rise to such suspension or demand for compensation no
longer exist:

     (a)  all Loans which would otherwise be made by such Bank as (or continued
as or converted to) Euro-Dollar Loans shall instead be Base Rate Loans (on which
interest and principal shall be payable contemporaneously with the related Euro-
Dollar Loans of the other Banks), and

     (b)  after each of its Euro-Dollar Loans has been repaid (or converted),
all payments of principal which would otherwise be applied to repay such Euro-
Dollar Loans shall be applied to repay its Base Rate Loans instead.

If such Bank notifies the Borrower that the circumstances giving rise to such
suspension or demand for compensation no longer exist, the principal amount of
each such Base Rate Loan shall be converted into a Euro-Dollar Loan on the first
day of the next succeeding Interest Period applicable to the related Euro-Dollar
Loans of the other Banks.

     SECTION 8.06.  Substitution of Bank. If (i) the obligation of any Bank to
make or to convert or continue outstanding Loans as or into Euro-Dollar Loans
have been suspended pursuant to Section 8.02 or (ii) any Bank has demanded
compensation under Section 8.03 or 8.04, the Borrower shall have the right, with
the assistance of the Administrative Agent, to designate a substitute bank or
banks (which may be one or more of the Banks) mutually satisfactory to the
Borrower, the Administrative Agent (whose consent shall not be unreasonably
withheld) and the issuing banks under the Related Documents to purchase for
cash, pursuant to an Assignment and Assumption Agreement in substantially the
form of Exhibit I hereto, the outstanding loans of such Bank and assume the
commitment and letter of credit liabilities of such Bank (and its affiliates)
under each of the Related Documents, without recourse to or warranty by, or
expense to, such Bank, for a purchase price equal to the principal amount of all
of such Bank's outstanding loans and funded letter of credit liabilities plus
any accrued but unpaid interest thereon and the accrued but unpaid fees in
respect of such Bank's commitments

                                       46
<PAGE>
 
     and letter of credit liabilities plus such amount, if any, as would be
     payable pursuant to the funding loss indemnities in the Related Documents
     if the outstanding loans of such Bank were prepaid in their entirety on the
     date of consummation of such assignment.



                                   ARTICLE 9

                                   GUARANTY

          SECTION 9.01. The Guaranty. The Guarantor hereby unconditionally,
     absolutely and irrevocably guarantees the full and punctual payment
     (whether at stated maturity, upon acceleration or otherwise) of all amounts
     payable by the Borrower under the Financing Documents including, without
     limitation, the principal of and interest on each Note issued by the
     Borrower pursuant to this Agreement. Upon failure by the Borrower to pay
     punctually any such amount, the Guarantor shall forthwith on demand pay the
     amount not so paid at the place and in the manner specified in this
     Agreement.

          SECTION 9.02. Guaranty Unconditional. The obligations of the Guarantor
     hereunder shall be unconditional, absolute and irrevocable and, without
     limiting the generality of the foregoing, shall not be released, discharged
     or otherwise affected by:

          (a)  any extension, renewal, settlement, compromise, waiver or release
     in respect of any obligation of the Borrower under any of the Financing
     Documents, by operation of law or otherwise;

          (b)  any modification or amendment of or supplement to any of the
     Financing Documents;

          (c)  any release, non-perfection or invalidity of any direct or
     indirect security for any obligation of the Borrower under any of the
     Financing Documents;

          (d)  any change in the corporate existence, structure or ownership of
     the Borrower, or any insolvency, bankruptcy, reorganization or other
     similar proceeding affecting the Borrower or its assets or any resulting
     release or discharge of any obligation of the Borrower contained in any of
     the Financing Documents;

          (e)  the existence of any claim, set-off or other rights which the
     Guarantor may have at any time against the Borrower, the Administrative
     Agent, 

                                       47
<PAGE>
 
     any Bank or any other corporation or person, whether in connection with any
     of the Financing Documents or any unrelated transactions, provided that
     nothing herein shall prevent the assertion of any such claim by separate
     suit or compulsory counterclaim;

          (f)  any invalidity or unenforceability relating to or against the
     Borrower for any reason of any of the Financing Documents, or any provision
     of applicable law or regulation purporting to prohibit the payment by the
     Borrower of the principal of or interest on any Note or any other amount
     payable under any of the Financing Documents; or

          (g)  any other act or omission to act or delay of any kind by the
     Borrower, the Administrative Agent, any Bank or any other corporation or
     person or any other circumstance whatsoever which might, but for the
     provisions of this paragraph, constitute a legal or equitable discharge of
     or defense to the Guarantor's obligations hereunder.

          SECTION 9.03.  Discharge Only upon Payment in Full; Reinstatement in
     Certain Circumstances. The Guarantor's obligations hereunder shall remain
     in full force and effect until the Commitments shall have terminated and
     the principal of and interest on the Notes and all other amounts payable by
     the Borrower under the Financing Documents shall have been paid in full. If
     at any time any payment of the principal of or interest on any Note or any
     other amount payable by the Borrower under the Financing Documents is
     rescinded or must be otherwise restored or returned upon the insolvency,
     bankruptcy or reorganization of the Borrower or otherwise, the Guarantor's
     obligations hereunder with respect to such payment shall be reinstated as
     though such payment had been due but not made at such time.

          SECTION 9.04.  Waiver by the Guarantor. The Guarantor irrevocably
     waives acceptance hereof, presentment, demand, protest and any notice not
     provided for herein, as well as any requirement that at any time any action
     be taken by any corporation or person against the Borrower or any other
     corporation or person.

          SECTION 9.05.  Subrogation. The Guarantor irrevocably waives any and
     all rights to which it may be entitled, by operation of law or otherwise,
     upon making any payment hereunder to be subrogated to the rights of the
     payee against the Borrower with respect to such payment or otherwise to be
     reimbursed, indemnified or exonerated by the Borrower in respect thereof.

          SECTION 9.06.  Stay of Acceleration. If acceleration of the time for
     payment of any amount payable by the Borrower under any of the Financing

                                       48
<PAGE>
 
     Documents is stayed upon the insolvency, bankruptcy or reorganization of
     the Borrower, all such amounts otherwise subject to acceleration under the
     terms of this Agreement shall nonetheless be payable by the Guarantor
     hereunder forthwith on demand by the Administrative Agent made at the
     request of the requisite proportion of the Banks specified in Article 6.



                                  ARTICLE 10

                                 MISCELLANEOUS

          SECTION 10.01. Notices. All notices, requests and other communications
     to any party hereunder shall be in writing (including bank wire, telex,
     facsimile transmission or similar writing) and shall be given to such
     party: (x) in the case of any Obligor or the Administrative Agent, at its
     address, facsimile number or telex number set forth on the signature pages
     hereof, (y) in the case of any Bank, at its address, facsimile number or
     telex number set forth in its Administrative Questionnaire or (z) in the
     case of any party, such other address, facsimile number or telex number as
     such party may hereafter specify for the purpose by notice to the
     Administrative Agent and the Borrower. Each such notice, request or other
     communication shall be effective (i) if given by telex, when such telex is
     transmitted to the telex number specified in this Section and the
     appropriate answerback is received, (ii) if given by facsimile
     transmission, when transmitted to the facsimile number specified in this
     Section and confirmation of receipt is received, (iii) if given by mail, 10
     days after such communication is deposited in the mails with first class
     postage prepaid, addressed as aforesaid or (iv) if given by any other
     means, when delivered at the address specified in this Section; provided
     that notices to the Administrative Agent under Article 2 or Article 8 shall
     not be effective until received.

          SECTION 10.02. No Waivers. No failure or delay by the Administrative
     Agent or any Bank in exercising any right, power or privilege under any
     Financing Document shall operate as a waiver thereof nor shall any single
     or partial exercise thereof preclude any other or further exercise thereof
     or the exercise of any other right, power or privilege. The rights and
     remedies provided in the Financing Documents shall be cumulative and not
     exclusive of any rights or remedies provided by law.

          SECTION 10.03. Expenses; Indemnification. (a) The Borrower shall pay
     (i) all out-of-pocket expenses of the Administrative Agent, including fees
     and disbursements of Davis Polk & Wardwell, special counsel for the Agents,
     reasonably incurred in connection with the preparation of the Financing
     Documents, any waiver or consent hereunder or thereunder or any amendment

                                       49
<PAGE>
 
     hereof or thereof or any Default or alleged Default hereunder or thereunder
     and (ii) if an Event of Default occurs, all out-of-pocket expenses incurred
     by the Administrative Agent and each Bank, including (without duplication)
     the fees and disbursements of outside counsel and the allocated cost of
     inside counsel, in connection with such Event of Default and collection,
     bankruptcy, insolvency and other enforcement proceedings resulting
     therefrom.

          (b)  The Borrower agrees to indemnify the Administrative Agent and
     each Bank, their respective affiliates and the respective directors,
     officers, agents and employees of the foregoing (each an "Indemnitee") and
     hold each Indemnitee harmless from and against any and all liabilities,
     losses, damages, costs and expenses of any kind, including, without
     limitation, the reasonable fees and disbursements of counsel, which may be
     reasonably incurred by such Indemnitee in connection with any
     investigative, administrative or judicial proceeding (whether or not such
     Indemnitee shall be designated a party thereto) brought or threatened
     relating to or arising out of the Financing Documents or any actual or
     proposed use of proceeds of Loans; provided that no Indemnitee shall have
     the right to be indemnified hereunder for such Indemnitee's own gross
     negligence or willful misconduct as determined by a court of competent
     jurisdiction.

          SECTION 10.04. Sharing; Set-Offs. (a) Each Bank agrees that if it
     shall, by exercising any right of set-off or counterclaim or otherwise,
     receive payment of a proportion of the aggregate amount of principal and
     interest due with respect to any Note held by it which is greater than the
     proportion received by any other Bank in respect of the aggregate amount of
     principal and interest due with respect to any Note held by such other
     Bank, the Bank receiving such proportionately greater payment shall
     purchase such participations in the Notes held by the other Banks, and such
     other adjustments shall be made, as may be required so that all such
     payments of principal and interest with respect to the Notes held by the
     Banks shall be shared by the Banks pro rata; provided that nothing in this
     Section shall impair the right of any Bank to exercise any right of set-off
     or counterclaim it may have and to apply the amount subject to such
     exercise to the payment of indebtedness of the Borrower other than its
     indebtedness hereunder. Each Obligor agrees, to the fullest extent it may
     effectively do so under applicable law, that any holder of a participation
     in a Note, whether or not acquired pursuant to the foregoing arrangements,
     may exercise rights of set-off or counterclaim and other rights with
     respect to such participation as fully as if such holder of a participation
     were a direct creditor of such Obligor in the amount of such participation.

          (b)  Upon (i) the occurrence and during the continuance of any Event
     of Default and (ii) the making of the request specified by Section 6.01 to
     the Administrative Agent to declare the Notes due and payable pursuant to
     the provisions of Section 6.01, each Bank and each of its affiliates is
     hereby

                                       50
<PAGE>
 
     authorized at any time and from time to time, the fullest extent permitted
     by law, to set off and otherwise apply any and all deposits (general or
     special, time or demand, provisional or final) at any time held and other
     indebtedness at any time owing by such Bank or such affiliate to or for the
     credit or the account of any Obligor against any and all of the obligations
     of such Obligor to such Bank now or hereafter existing under the Financing
     Documents, irrespective of whether such Bank shall have made any demand for
     payment thereof and although such obligations may be unmatured. Each Bank
     agrees promptly to notify such Obligor, after any such setoff and
     application; provided, however, that the failure to give notice shall not
     affect the validity of such setoff and application. The rights of each Bank
     and its affiliates under this Section are in addition to other rights and
     remedies (including, without limitation, other rights of setoff) that such
     Bank and its affiliates may have.

          SECTION 10.05. Amendments and Waivers. Any provision of this Agreement
     or the Notes may be amended or waived if, but only if, such amendment or
     waiver is in writing and is signed by the Obligors and the Required Banks
     (and, if the rights or duties of the Administrative Agent are affected
     thereby, by the Administrative Agent); provided that no such amendment or
     waiver shall, unless signed by all the Banks, (i) increase or decrease the
     Commitment of any Bank (except for a ratable decrease in the Commitments of
     all Banks) or subject any Bank to any additional obligation, (ii) reduce
     the principal of or rate of interest on any Loan or any fees hereunder,
     (iii) postpone the date fixed for any payment of principal of or interest
     on any Loan or any fees hereunder or for any reduction or termination of
     any Commitment, (iv) release the Guarantor hereunder, (v) change the
     percentage of the Commitments or of the aggregate unpaid principal amount
     of the Notes, or the number of Banks, which shall be required for the Banks
     or any of them to take any action under this Section or any other provision
     of this Agreement or (vii) amend this Section 10.05.

          SECTION 10.06. Successors and Assigns. (a) The provisions of this
     Agreement shall be binding upon and inure to the benefit of the parties
     hereto and their respective successors and assigns, except that the
     Obligors may not assign or otherwise transfer any of their rights under
     this Agreement without the prior written consent of all Banks.

          (b)  Any Bank may at any time grant to one or more banks or other
     institutions (each a "PARTICIPANT") participating interests in its
     Commitment or any or all of its Loans. In the event of any such grant by a
     Bank of a participating interest to a Participant, whether or not upon
     notice to the Borrower and the Administrative Agent, such Bank shall remain
     responsible for the performance of its obligations hereunder, and the
     Borrower and the Administrative Agent shall 

                                       51
<PAGE>
 
     continue to deal solely and directly with such Bank in connection with such
     Bank's rights and obligations under this Agreement. Any agreement pursuant
     to which any Bank may grant such a participating interest shall provide
     that such Bank shall retain the sole right and responsibility to enforce
     the obligations of the Borrower hereunder including, without limitation,
     the right to approve any amendment, modification or waiver of any provision
     of this Agreement; provided that such participation agreement may provide
     that such Bank will not agree to any modification, amendment or waiver of
     this Agreement described in clause (i), (ii), (iii), (iv) or (v) of Section
     10.05 without the consent of the Participant. The Borrower agrees that each
     Participant shall, to the extent provided in its participation agreement
     and subject to subsection 10.06(e) below, be entitled to the benefits of
     Article 8 with respect to its participating interest. An assignment or
     other transfer which is not permitted by subsection 10.06(c) or 10.06(d)
     below shall be given effect for purposes of this Agreement only to the
     extent of a participating interest granted in accordance with this
     subsection 10.06(b).

          (c)  Any Bank may at any time assign to one or more banks or other
     institutions (each an "ASSIGNEE") all, or a proportionate part (equivalent
     to an initial participation in the Related Documents of not less than
     $15,000,000, unless the Borrower shall otherwise consent or the assignment
     is for all of the rights and obligations of the transferor Bank) of all, of
     its rights and obligations under this Agreement and the Notes, and such
     Assignee shall assume such rights and obligations, pursuant to an
     Assignment and Assumption Agreement in substantially the form of Exhibit H
     hereto executed by such Assignee and such transferor Bank, with (and
     subject to) the subscribed consent of the Borrower and the Administrative
     Agent, which shall not be unreasonably withheld; provided that if an
     Assignee is an affiliate of such transferor Bank or was a Bank immediately
     prior to such assignment, no such consent of the Borrower or the
     Administrative Agent shall be required; and provided further that, unless
     the Borrower shall otherwise consent or the assignment is for all of the
     rights and obligations of the transferor Bank, the participation in the
     Related Documents of such transferor Bank after giving effect to such
     assignment (together with the participations of its affiliates) shall not
     be less than $15,000,000; and provided further that such assignment shall
     be accompanied by a ratably equivalent assignment of the rights and
     obligations of the transferor Bank (and its affiliates) under each of the
     other Related Documents. Upon execution and delivery of such instrument and
     payment by such Assignee to such transferor Bank of an amount equal to the
     purchase price agreed between such transferor Bank and such Assignee, such
     Assignee shall be a Bank party to this Agreement and shall have all the
     rights and obligations of a Bank as set forth in such instrument of
     assumption, and the transferor Bank shall be released from its obligations
     hereunder to a corresponding extent, and no further consent or action by
     any party shall be required. Upon the consummation of any assignment
     pursuant to this 

                                       52
<PAGE>
 
     subsection 10.06(c), the transferor Bank, the Administrative Agent and the
     Borrower shall make appropriate arrangements so that, if required, a new
     Note is issued to the Assignee. In connection with any such assignment, the
     transferor Bank shall pay to the Administrative Agent an administrative fee
     for processing such assignment in the amount of $2,500.

          (d)  Any Bank may at any time assign all or any portion of its rights
     under this Agreement and its Note to a Federal Reserve Bank. No such
     assignment shall release the transferor Bank from its obligations
     hereunder.

          (e)  No Assignee, Participant or other transferee of any Bank's rights
     shall be entitled to receive any greater payment under Section 8.03 or 8.04
     than such Bank would have been entitled to receive with respect to the
     rights transferred, unless such transfer is made with the Borrower's prior
     written consent or by reason of the provisions of Section 8.02, 8.03 or
     8.04 requiring such Bank to designate a different Applicable Lending Office
     under certain circumstances or at a time when the circumstances giving rise
     to such greater payment did not exist.

          SECTION 10.07. Collateral. Each of the Banks represents to the
     Administrative Agent and each of the other Banks that it in good faith is
     not relying upon any "margin stock" (as defined in Regulation U) as
     collateral in the extension or maintenance of the credit provided for in
     this Agreement.

          SECTION 10.08. Governing Law. This Agreement and each Note shall be
     governed by and construed in accordance with the laws of the State of New
     York.

          SECTION 10.09. Counterparts; Integration; Effectiveness. This
     Agreement may be signed in any number of counterparts, each of which shall
     be an original, with the same effect as if the signatures thereto and
     hereto were upon the same instrument. This Agreement and the other
     Financing Documents constitute the entire agreement and understanding among
     the parties hereto and supersedes any and all prior agreements and
     understandings, oral or written, relating to the subject matter hereof.
     This Agreement shall become effective upon receipt by the Administrative
     Agent of counterparts hereof signed by each of the parties hereto (or, in
     the case of any party as to which an executed counterpart shall not have
     been received, receipt by the Administrative Agent in form satisfactory to
     it of telegraphic, telex, facsimile or other written confirmation from such
     party of execution of a counterpart hereof by such party).

          SECTION 10.10. Judicial Proceedings. (a) Consent to Jurisdiction. Each
     Obligor irrevocably submits to the jurisdiction of any federal court
     sitting in New York City and, in the event that jurisdiction cannot be
     obtained or maintained in a federal court, to the jurisdiction of any New
     York State court sitting in New York

                                       53
<PAGE>
 
     City over any suit, action or proceeding arising out of or relating to any
     of the Financing Documents. Each Obligor irrevocably waives, to the fullest
     extent permitted by law, any objection which it may now or hereafter have
     to the laying of the venue of any such suit, action or proceeding brought
     in such court and any claim that any suit, action or proceeding brought in
     such a court has been brought in an inconvenient forum. Each Obligor agrees
     that a final judgment in any such suit, action or proceeding brought in
     such a court shall be conclusive and binding upon it and will be given
     effect in the Cayman Islands, to the fullest extent permitted by applicable
     law and may be enforced in any federal or New York State court sitting in
     New York City (or any other courts to the jurisdiction of which such
     Obligor is or may be subject) by a suit upon such judgment, provided that
     service of process is effected upon it in one of the manners specified
     herein or as otherwise permitted by law.

          (b)  Appointment of Agent for Service of Process. Each Obligor hereby
     irrevocably designates and appoints CT Corporation System having an office
     on the date hereof at 1633 Broadway, New York, New York 10019 as its
     authorized agent, to accept and acknowledge on its behalf, service of any
     and all process which may be served in any suit, action or proceeding of
     the nature referred to in subsection 10.10(a) above in any federal or New
     York State court sitting in New York City. Each Obligor represents and
     warrants that such agent has agreed in writing to accept such appointment
     and that a true copy of such designation and acceptance has been delivered
     to the Administrative Agent. Said designation and appointment shall be
     irrevocable until the Commitments shall have terminated and all principal
     and interest and all other amounts payable hereunder and under the Notes
     shall have been paid in full in accordance with the provisions hereof and
     thereof. If such agent shall cease so to act, each Obligor covenants and
     agrees to designate irrevocably and appoint without delay another such
     agent satisfactory to the Administrative Agent and to deliver promptly to
     the Administrative Agent evidence in writing of such other agent's
     acceptance of such appointment.

          (c)  Service of Process. Each Obligor hereby consents to process being
     served in any suit, action or proceeding of the nature referred to in
     subsection 10.10(a) above in any federal or New York State court sitting in
     New York City by service of process upon the agent of such Obligor for
     service of process in such jurisdiction appointed as provided in subsection
     10.10(b) above; provided that, to the extent lawful and possible, notice of
     said service upon such agent shall be mailed by registered or certified air
     mail, postage prepaid, return receipt requested, to such Obligor at its
     address specified on the signature page hereof or to any other address of
     which such Obligor shall have given written notice to the Bank. Each
     Obligor irrevocably waives, to the fullest extent permitted by law, all
     claim of error by reason of any such service in such manner and agrees that
     such service shall be deemed in every respect effective service of process
     upon such 

                                       54
<PAGE>
 
     Obligor in any such suit, action or proceeding and shall, to the fullest
     extent permitted by law, be taken and held to be valid and personal service
     upon and personal delivery to such Obligor.

          (d)  No Limitation on Service or Suit. Nothing in this Section 10.10
     shall affect the right of the Administrative Agent or any Bank to serve
     process in any other manner permitted by law or limit the right of the
     Administrative Agent or any Bank to bring proceedings against any Obligor
     in the courts of any jurisdiction or jurisdictions.

          SECTION 10.11. Judgment Currency. If, under any applicable law and
     whether pursuant to a judgment being made or registered against any Obligor
     or for any other reason, any payment under or in connection with any of the
     Financing Documents is made or satisfied in a currency (the "OTHER
     CURRENCY") other than that in which the relevant payment is due (the
     "REQUIRED CURRENCY") then, to the extent that the payment (when converted
     into the Required Currency at the rate of exchange on the date of payment
     or, if it is not practicable for the party entitled thereto (the "PAYEE")
     to purchase the Required Currency with the Other Currency on the date of
     payment, at the rate of exchange as soon thereafter as it is practicable
     for it to do so) actually received by the Payee falls short of the amount
     due under the terms of this Agreement and the Notes, each Obligor shall, to
     the extent permitted by law, as a separate and independent obligation,
     indemnify and hold harmless the Payee against the amount of such short-
     fall. For the purpose of this Section, "RATE OF EXCHANGE" means the rate at
     which the Payee is able on the relevant date to purchase the Required
     Currency with the Other Currency and shall take into account any premium
     and other costs of exchange.

          SECTION 10.12. WAIVER OF JURY TRIAL. EACH OF THE OBLIGORS, THE
     ADMINISTRATIVE AGENT AND THE BANKS HEREBY IRREVOCABLY WAIVES ANY AND ALL
     RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING
     TO THE FINANCING DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED THEREBY.

          SECTION 10.13. Confidentiality. The Administrative Agent and each Bank
     agrees to keep any information delivered or made available by the Borrower
     pursuant to this Agreement confidential from anyone other than persons
     employed or retained by such Bank and its affiliates who are engaged in
     evaluating, approving, structuring or administering the credit facility
     contemplated hereby; provided that nothing herein shall prevent any Bank
     from disclosing such information (a) to any other Bank or to the
     Administrative Agent, (b) subject to provisions substantially similar to
     those contained in this Section 10.13, to any other Person if reasonably
     incidental to the administration of the credit facility 

                                       55
<PAGE>
 
     contemplated hereby, (c) upon the order of any court or administrative
     agency, (d) upon the request or demand of any regulatory agency or
     authority, (e) which had been publicly disclosed other than as a result of
     a disclosure by the Administrative Agent or any Bank prohibited by this
     Agreement, (f) in connection with any litigation relating to the Related
     Documents to which the Administrative Agent, any Bank or its subsidiaries
     or Parent may be a party, (g) to the extent necessary in connection with
     the exercise of any remedy hereunder, (h) to such Bank's or Administrative
     Agent's legal counsel and independent auditors and (i) subject to
     provisions substantially similar to those contained in this Section 10.13,
     to any actual or proposed Participant or Assignee. Notwithstanding the
     foregoing, this Section 10.13 shall not apply to information that is or
     becomes publicly available, information that was available to a Bank on a
     non-confidential basis prior to its disclosure hereunder and information
     which becomes available to a Bank on a non-confidential basis from a source
     that is not, to such Bank's knowledge, subject to a confidentiality
     agreement with any Obligor.

                                       56
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.


                                      ACE US HOLDINGS, INC.


                                      By______________________________
                                        Title:
                                      The ACE Building
                                      30 Woodbourne Avenue
                                      Hamilton HM 08, Bermuda
                                      Telex number: 3543ACEILBA
                                      Facsimile number: (441) 295-5221


                                      ACE LIMITED, as Guarantor

                                      By______________________________
                                        Title:
                                      The ACE Building
                                      30 Woodbourne Avenue
                                      Hamilton HM 08, Bermuda
                                      Telex number: 3543ACEILBA
                                      Facsimile number: (441) 295-5221

The Common Seal of ACE
Limited was hereunto affixed
in the presence of:

Director

____________________________

Director/Secretary

____________________________

                                       57
<PAGE>
 
Commitments
- -----------

$24,000,000                             MORGAN GUARANTY TRUST
                                          COMPANY OF NEW YORK


                                        By__________________________
                                          Title:

$24,000,000                             MELLON BANK, N.A.


                                        By__________________________
                                          Title:

                                        Managing Agent


$20,000,000                             CITIBANK, N.A.


                                        By__________________________
                                          Title:


                                        Co-Agents


$18,000,000                             THE BANK OF NEW YORK


                                        By__________________________
                                          Title:


$18,000,000                             THE BANK OF TOKYO-MITSUBISHI,
                                          LTD.


                                        By___________________________
                                          Title:

                                       58
<PAGE>
 
$18,000,000                             BARCLAYS BANK PLC


                                        By___________________________
                                          Title:


$18,000,000                             DEUTSCHE BANK AG, NEW YORK
                                          AND/OR CAYMAN ISLANDS
                                          BRANCH


                                        By___________________________
                                          Title:


                                        By___________________________
                                          Title:


$18,000,000                             FLEET NATIONAL BANK


                                        By___________________________
                                          Title:


$18,000,000                             ING BANK, N.V.


                                        By___________________________
                                          Title:


                                        By___________________________
                                          Title:


$18,000,000                             ROYAL BANK OF CANADA


                                        By___________________________
                                          Title:

                                       59
<PAGE>
 
                                        Other Banks


$8,000,000                              BANK OF BERMUDA
                                        (LUXEMBOURG) S.A.


                                        By___________________________
                                          Title:


$8,000,000                              BANQUE NATIONALE DE PARIS


                                        By___________________________
                                          Title:


                                        By___________________________
                                          Title:


$8,000,000                              THE CHASE MANHATTAN BANK


                                        By___________________________
                                          Title:


$8,000,000                              CREDIT LYONNAIS NEW YORK
                                          BRANCH


                                        By___________________________
                                          Title:

                                       60
<PAGE>
 
$8,000,000                              DRESDNER BANK A.G., NEW YORK
                                          BRANCH AND GRAND CAYMAN
                                          BRANCH


                                        By___________________________
                                          Title:


                                        By___________________________
                                          Title:


$8,000,000                              THE FIRST NATIONAL BANK OF
                                          CHICAGO


                                        By___________________________
                                          Title:


$8,000,000                              STATE STREET BANK AND TRUST
                                          COMPANY

                                        By___________________________
                                          Title:


- -----------------

Total Commitments

$250,000,000
=================

                                       61
<PAGE>
 
                                        MORGAN GUARANTY TRUST
                                         COMPANY OF NEW YORK,
                                         as Administrative Agent


                                        By___________________________
                                          Title
                                        60 Wall Street
                                        New York, New York 10260-0060
                                        Attention: Glenda Irving
                                        Telex number: 177615
                                        Facsimile number: 212-648-5249

                                       62
<PAGE>
 
                               PRICING SCHEDULE

     "EURO-DOLLAR MARGIN" means, for any date, the rate set forth below in the
row opposite such term and in the column corresponding to the "Pricing Level"
that applies at such date:

- --------------------------------------------------------------------------
Euro-Dollar Margin            Level I   Level II   Level III   Level IV
- --------------------------------------------------------------------------
On or before fifth
 Principal Payment Date       0.375%    0.50%      0.625%      0.75%
- --------------------------------------------------------------------------
After fifth Principal
 Payment Date                 0.50%     0.625%     0.75%       0.875%
- --------------------------------------------------------------------------

     For purposes of this Schedule, the following terms have the following
meanings:

     "LEVEL I" applies at any date if, at such date, ACE Insurance's claims
paying ability is rated AA- or higher by S&P and (if rated by Moody's) Aa3 or
                                             ---
higher by Moody's.

     "LEVEL II" applies at any date if, at such date, (i) ACE Insurance's claims
paying ability is rated A+ or higher by S&P and (if rated by Moody's) A1 or
                                            ---
higher by Moody's and (ii) Level I does not apply.

     "LEVEL III" applies at any date if, at such date, (i) ACE Insurance's
claims paying ability is rated A or higher by S&P and (if rated by Moody's) A2
                                                  ---
or higher by Moody's and (ii) neither Level I nor Level II applies.

     "LEVEL IV" applies at any date if, at such date, no other Pricing Level
applies.

     "MOODY'S" means Moody's Investors Service, Inc., and any successor thereto.

     "PRICING LEVEL" refers to the determination of which of Level I, Level II,
Level III or Level IV applies at any date.

     "S&P" means Standard & Poor's Rating Services, a division of The McGraw-
Hill Companies, Inc., and any successor thereto.

     The credit ratings to be utilized for purposes of this Schedule are those
ratings assigned to the claims paying ability of ACE Insurance and any rating
<PAGE>
 
assigned to any debt security of any Obligor or the claims paying ability of any
Obligor shall be disregarded. The rating in effect at any date is that in effect
at the close of business on such date.

                                       2
<PAGE>
 
                                                                       EXHIBIT A



                                     NOTE




     $______________                                   New York, New York

                                                       December 11, 1997




     For value received, ACE US Holdings, Inc., a Delaware corporation (the
"Borrower"), promises to pay to the order of       (the "Bank"), for the 
account of its Applicable Lending Office, the unpaid principal amount of each
Loan made by the Bank to the Borrower pursuant to the Loan Agreement referred to
below in installments as specified in the Loan Agreement. The Borrower promises
to pay interest on the unpaid principal amount of each such Loan on the dates
and at the rate or rates provided for in the Loan Agreement. All such payments
of principal and interest shall be made in lawful money of the United States in
Federal or other immediately available funds at the office of Morgan Guaranty
Trust Company of New York, 60 Wall Street, New York, New York.

     All Loans made by the Bank, the respective types thereof and all repayments
of the principal thereof shall be recorded by the Bank and, if the Bank so
elects in connection with any transfer or enforcement hereof, appropriate
notations to evidence the foregoing information with respect to each such Loan
then outstanding may be endorsed by the Bank on the schedule attached hereto, or
on a continuation of such schedule attached to and made a part hereof; provided
that the failure of the Bank to make any such recordation or endorsement shall
not affect the obligations of any Obligor hereunder or under the Loan Agreement.

     This note is one of the Notes referred to in the Term Loan Agreement dated
as of December 11, 1997 among the Borrower, ACE Limited, as Guarantor, the banks
listed on the signature pages thereof and Morgan Guaranty Trust
<PAGE>
 
Company of New York, as Administrative Agent (as the same may be amended from
time to time, the "Loan Agreement"). Terms defined in the Loan Agreement are
used herein with the same meanings. Reference is made to the Loan Agreement for
provisions for the prepayment hereof and the acceleration of the maturity
hereof.

     Pursuant to the Loan Agreement payment of principal and interest on this
Note is unconditionally guaranteed by the Guarantor named above and secured by
the Pledge Agreement referred to in the Loan Agreement.


                                        ACE US HOLDINGS, INC.


                                        By___________________________
                                          Title:

                                       2
<PAGE>
 
                                 Note (cont'd)

                        LOANS AND PAYMENTS OF PRINCIPAL


________________________________________________________________________________
                                                     Amount of
                  Amount of         Type of          Principal      Notation
     Date           Loan             Loan              Repaid       Made By
________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

________________________________________________________________________________

                                       3
<PAGE>
 
                                                                       EXHIBIT B

                               PLEDGE AGREEMENT

     AGREEMENT dated as of December 11, 1997 between ACE US HOLDINGS, INC. (with
its successors, the "BORROWER") and MORGAN GUARANTY TRUST COMPANY OF NEW YORK,
as administrative agent (the "ADMINISTRATIVE AGENT").

                             W I T N E S S E T H :

     WHEREAS, the Borrower, certain banks (the "BANKS") and the Administrative
Agent are parties to a Term Loan Agreement dated as of December 11, 1997 (as the
same may be amended from time to time, the "TERM LOAN AGREEMENT"); and

     WHEREAS, in order to induce the Banks and the Administrative Agent to enter
into the Term Loan Agreement, the Borrower has agreed to grant a continuing
security interest in and to the Collateral (as hereafter defined) to secure its
obligations under the Term Loan Agreement and the Notes issued pursuant thereto;

     NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

     SECTION 1. Definitions. Terms defined in the Term Loan Agreement and not
otherwise defined herein have, as used herein, the respective meanings provided
for therein. The following additional terms, as used herein, have the following
respective meanings:

     "ACE INSURANCE" means A.C.E. Insurance Company Ltd., a Bermuda limited
liability company.

     "COLLATERAL" has the meaning assigned to such term in Section 3(a).

     "PERFECTION CERTIFICATE" means a certificate substantially in the form of
Exhibit A, completed and supplemented with the schedules and attachments
contemplated thereby to the satisfaction of the Administrative Agent, and duly
executed by the chief executive officer and the chief legal officer of the
Borrower.

     "PROCEEDS" means all proceeds of, and all other profits, products, rents or
receipts, in whatever form, arising from the collection, sale, lease, exchange,
<PAGE>
 
assignment, licensing or other disposition of, or other realization upon,
collateral, including without limitation all claims of the Borrower against
third parties for loss of, damage to or destruction of, or for proceeds payable
under, or unearned premiums with respect to, policies of insurance in respect
of, any collateral, and any condemnation or requisition payments with respect to
any collateral, in each case whether now existing or hereafter arising.

     "SECURED OBLIGATIONS" means the obligations secured under this Agreement
including (i) all principal of and interest (including, without limitation, any
interest which accrues after the commencement of any case, proceeding or other
action relating to the bankruptcy, insolvency or reorganization of the Borrower,
whether or not allowed or allowable as a claim in any such proceeding) on any
Note issued pursuant to, the Term Loan Agreement, (ii) all other amounts payable
by the Borrower hereunder or under the other Financing Documents and (iii) any
renewals or extensions of any of the foregoing.

     "SECURITY INTERESTS" means the security interests in the Collateral granted
hereunder securing the Secured Obligations.

     "SUBORDINATED LOAN AGREEMENT" means the subordinated loan agreement dated
as of December 11, 1997 among ACE Insurance, the Borrower and the Administrative
Agent, as amended from time to time.

     "UCC" means the Uniform Commercial Code as in effect on the date hereof in
the State of New York; provided that if by reason of mandatory provisions of
law, the perfection or the effect of perfection or non-perfection of the
Security Interest in any Collateral is governed by the Uniform Commercial Code
as in effect in a jurisdiction other than New York "UCC" means the Uniform
Commercial Code as in effect in such other jurisdiction for purposes of the
provisions hereof relating to such perfection or effect of perfection or non-
perfection.

     Unless otherwise defined herein, or unless the context otherwise requires,
all terms used herein which are defined in the UCC shall have the meanings
therein stated.

     SECTION 2. Representations and Warranties. The Borrower represents
and warrants as follows:

          (a)  The Borrower has good title to all of the Collateral, free and
     clear of any Liens.

                                       2
<PAGE>
 
          (b) The Borrower has not performed any acts which might prevent the
     Administrative Agent from enforcing any of the terms of this Agreement or
     which would limit the Administrative Agent in any such enforcement. No
     financing statement, mortgage, security agreement or similar or equivalent
     document or instrument covering all or any part of the Collateral is on
     file or of record in any jurisdiction in which such filing or recording
     would be effective to perfect a Lien on such Collateral.

          (c) Not less than five Domestic Business Days prior to the date of the
     first Borrowing under the Term Loan Agreement, the Borrower shall deliver
     the Perfection Certificate to the Administrative Agent. The information set
     forth therein shall be correct and complete. Not later than 60 days
     following the date of the Borrowing, the Borrower shall furnish to the
     Administrative Agent file search reports from each UCC filing office set
     forth in Schedule 7 to the Perfection Certificate confirming the filing
     information set forth in such Schedule.

          (d) The Security Interests constitute valid first-priority security
     interests under the UCC securing the Secured Obligations. When UCC
     financing statements in the form specified in Exhibit A shall have been
     filed in the offices specified in the Perfection Certificate, the Security
     Interests shall constitute perfected security interests in the Collateral
     to the extent that a security interest therein may be perfected by filing
     pursuant to the UCC, prior to all other Liens and rights of others therein
     except for the Security Interests.

     SECTION 3. The Security Interests. (a) In order to secure the full and
punctual payment of the Secured Obligations in accordance with the terms
thereof, and to secure the performance of all the obligations of the Borrower
under the Financing Documents, the Borrower hereby grants to the Administrative
Agent for the benefit of the Banks a continuing security interest in and to all
of the following property of the Borrower, whether now owned or existing or
hereafter acquired or arising and regardless of where located (all being
collectively referred to as the "COLLATERAL"):

          (i)  The Subordinated Loan Agreement and all rights and privileges of
     the Borrower with respect thereto and all payments, and rights to receive
     payments, thereunder or with respect thereto (including without limitation
     all rights to demand and receive advances of subordinated loans
     thereunder);

          (ii) All books and records (including, without limitation, customer
     lists, credit files, computer programs, printouts and other 

                                       3
<PAGE>
 
     computer materials and records) of the Borrower pertaining to any of the
     Collateral; and

          (iii) All Proceeds of all or any of the Collateral described in
     clauses 3(a)(i) and 3(a)(ii) hereof.

          (b)   The Security Interests are granted as security only and shall
     not subject the Administrative Agent or any Bank to, or transfer or in any
     way affect or modify, any obligation or liability of the Borrower or any of
     its Subsidiaries with respect to any of the Collateral or any transaction
     in connection therewith.

     SECTION 4. Further Assurances.

     (a)  The Borrower will not change its name, identity or corporate structure
in any manner unless it shall have given the Administrative Agent not less than
30 days' prior notice thereof and delivered an opinion of counsel with respect
thereto in accordance with Section 4(c). The Borrower will not change the
location of its chief executive office or chief place of business from the
applicable location described in the Perfection Certificate unless it shall have
given the Administrative Agent not less than 30 days' prior notice thereof and
delivered an opinion of counsel with respect thereto in accordance with Section
4(c).

     (b)  The Borrower will, from time to time, at its expense, execute,
deliver, file and record any statement, assignment, instrument, document,
agreement or other paper and take any other action, (including, without
limitation, any filings of financing or continuation statements under the UCC)
that from time to time may be necessary or desirable, or that the Administrative
Agent may request, in order to create, preserve, perfect, confirm or validate
the Security Interests or to enable the Administrative Agent and the Banks to
obtain the full benefits of this Agreement, or to enable the Administrative
Agent to exercise and enforce any of its rights, powers and remedies hereunder
with respect to any of the Collateral. To the extent permitted by applicable
law, the Borrower hereby authorizes the Administrative Agent to execute and file
financing statements or continuation statements without the Borrower's signature
appearing thereon. The Borrower agrees that a carbon, photographic, photostatic
or other reproduction of this Agreement or of a financing statement is
sufficient as a financing statement. The Borrower shall pay the costs of, or
incidental to, any recording or filing of any financing or continuation
statements concerning the Collateral.

     (c)  Not more than six months nor less than 30 days prior to each date on
which the Borrower proposes to take any action contemplated by Section 4(a), the
Borrower shall, at its cost and expense, cause to be delivered to the Banks an

                                       4

<PAGE>
 
opinion of counsel, satisfactory to the Administrative Agent, substantially in
the form of Exhibit B to the effect that all financing statements and amendments
or supplements thereto, continuation statements and other documents required to
be recorded or filed in order to perfect and protect the Security Interests for
a period, specified in such opinion, continuing until a date not earlier than
six months from the date of such opinion, against all creditors of and
purchasers from the Borrower have been filed in each filing office necessary for
such purpose and that all filing fees and taxes, if any, payable in connection
with such filings have been paid in full.

     SECTION 5. General Authority. The Borrower hereby irrevocably appoints the
Administrative Agent its true and lawful attorney, with full power of
substitution, in the name of the Borrower, the Administrative Agent, the Banks
or otherwise, for the sole use and benefit of the Administrative Agent and the
Banks, but at the Borrower's expense, to the extent permitted by law to
exercise, at any time and from time to time while an Event of Default has
occurred and is continuing, all or any of the following powers with respect to
all or any of the Collateral:

          (a)  to demand, sue for, collect, receive and give acquittance for any
     and all monies due or to become due thereon or by virtue thereof, and,
     without limiting the generality of the foregoing, to give a borrowing
     request under Section 2 of the Subordinated Loan Agreement,

          (b)  to settle, compromise, compound, prosecute or defend any action
     or proceeding with respect thereto,

          (c)  to sell, transfer, assign or otherwise deal in or with the same
     or the proceeds or avails thereof, as fully and effectually as if the
     Administrative Agent were the absolute owner thereof,

          (d)  to extend the time of payment of any or all thereof and to make
     any allowance and other adjustments with reference thereto, and

          (e)  to exercise any other remedies provided by applicable law;

provided that the Administrative Agent shall give the Borrower not less than ten
days' prior notice of the time and place of any sale or other intended
disposition of any of the Collateral, except any Collateral which is perishable
or threatens to decline speedily in value or is of a type customarily sold on a
recognized market. The Administrative Agent and the Borrower agree that such
notice constitutes "reasonable notification" within the meaning of Section 9-
504(3) of the UCC.

                                       5
<PAGE>
 
     SECTION 6. Limitation on Duty of Administrative Agent in Respect of
Collateral. Beyond the exercise of reasonable care in the custody thereof, the
Administrative Agent shall have no duty as to any Collateral in its possession
or control or in the possession or control of any agent or bailee or any income
thereon or as to the preservation of rights against prior parties or any other
rights pertaining thereto. The Administrative Agent shall be deemed to have
exercised reasonable care in the custody of the Collateral in its possession if
the Collateral is accorded treatment substantially equal to that which it
accords its own property, and shall not be liable or responsible for any loss or
damage to any of the Collateral, or for any diminution in the value thereof, by
reason of the act or omission of any warehouseman, carrier, forwarding agency,
consignee or other agent or bailee selected by the Administrative Agent in good
faith.

     SECTION 7. Application of Proceeds. Upon the occurrence and during the
continuance of an Event of Default, the proceeds of any realization upon all or
any part of the Collateral shall be applied by the Administrative Agent in the
following order of priorities:

          FIRST, to payment of the expenses of such realization, including
     reasonable compensation to agents and counsel for the Administrative Agent,
     and all expenses, liabilities and advances incurred or made by the
     Administrative Agent in connection therewith, and any other unreimbursed
     expenses for which the Administrative Agent or any Bank is to be reimbursed
     pursuant to Section 10.03 of the Term Loan Agreement and unpaid fees owing
     to the Administrative Agent under the Term Loan Agreement;

          SECOND, to the ratable payment of unpaid principal of the Secured
     Obligations;

          THIRD, to the ratable payment of accrued but unpaid interest on the
     Secured Obligations in accordance with the provisions of the Term Loan
     Agreement;

          FOURTH, to the ratable payment of all other Secured Obligations, until
     all Secured Obligations shall have been paid in full; and finally, to
     payment to the Borrower or its successors or assigns, or as a court of
     competent jurisdiction may direct, of any surplus then remaining from such
     proceeds.

The Administrative Agent may make distributions hereunder in cash or in kind or,
on a ratable basis, in any combination thereof.

                                       6
<PAGE>
 
     SECTION 8. Concerning the Administrative Agent. The provisions of Article 7
of the Term Loan Agreement shall inure to the benefit of the Administrative
Agent in respect of this Agreement and shall be binding upon the parties to the
Term Loan Agreement in such respect. In furtherance and not in derogation of the
rights, privileges and immunities of the Administrative Agent therein set forth:

     (a) The Administrative Agent is authorized to take all such action as is
provided to be taken by it as Administrative Agent hereunder and all other
action reasonably incidental thereto. As to any matters not expressly provided
for herein (including, without limitation, the timing and methods of realization
upon the Collateral) the Administrative Agent shall act or refrain from acting
in accordance with written instructions from the Required Banks or, in the
absence of such instructions, in accordance with its discretion.

     (b) The Administrative Agent shall not be responsible for the existence,
genuineness or value of any of the Collateral or for the validity, perfection,
priority or enforceability of the Security Interests in any of the Collateral,
whether impaired by operation of law or by reason of any action or omission to
act on its part hereunder. The Administrative Agent shall have no duty to
ascertain or inquire as to the performance or observance of any of the terms of
this Agreement by the Borrower.

     SECTION 9. Appointment of Co-Agents. At any time or times, in order to
comply with any legal requirement in any jurisdiction, the Secured Party may
appoint another bank or trust company or one or more other Persons, either to
act as co-agent or co-agents, jointly with the Secured Party, or to act as
separate agent or co-agents on behalf of the Secured Party with such power and
authority as may be necessary for the effectual operation of the provisions
hereof and may be specified in the instrument of appointment.

     SECTION 10. Termination of Security Interests; Release of Collateral. Upon
the repayment in full of all Secured Obligations and the termination of the
Commitments under the Credit Agreement, the Security Interests shall terminate
and all rights to the Collateral shall revert to the Borrower. At any time and
from time to time prior to such termination of the Security Interests, the
Administrative Agent may release any of the Collateral with the prior written
consent of the Required Banks. Upon any such termination of the Security
Interests or release of Collateral, the Agent will, at the expense of the
Borrower, execute and deliver to the Borrower such documents as the Borrower
shall reasonably request to evidence the termination of the Security Interests
or the release of such Collateral, as the case may be.
<PAGE>
 
     SECTION 11. Notices. All notices, communications and distributions
hereunder shall be given in accordance with Section 10.01 of the Term Loan
Agreement.

     SECTION 12. Successors and Assigns. This Agreement is for the benefit of
the Administrative Agent and the Banks and their successors and assigns, and in
the event of an assignment of all or any of the Secured Obligations, the rights
hereunder, to the extent applicable to the indebtedness so assigned, shall be
transferred with such indebtedness. This Agreement shall be binding on the
Borrower and its successors and assigns.

     SECTION 13. Changes in Writing. Neither this Agreement nor any provision
hereof may be changed, waived, discharged or terminated orally, but only in
writing signed by the Borrower and the Administrative Agent with the consent of
the Required Banks.

     SECTION 14. New York Law. This Agreement shall be construed in accordance
with and governed by the laws of the State of New York, except as otherwise
required by mandatory provisions of law and except to the extent that remedies
provided by the laws of any jurisdiction other than New York are governed by the
laws of such jurisdiction.

     SECTION 15. Severability. If any provision hereof is invalid or
unenforceable in any jurisdiction, then, to the fullest extent permitted by law,
(i) the other provisions hereof shall remain in full force and effect in such
jurisdiction and shall be liberally construed in favor of the Administrative
Agent and the Banks in order to carry out the intentions of the parties hereto
as nearly as may be possible; and (ii) the invalidity or unenforceability of any
provision hereof in any jurisdiction shall not affect the validity or
enforceability of such provision in any other jurisdiction.

                                       8
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.

                                      ACE US HOLDINGS, INC.


                                      By:___________________________________
                                         Name:
                                         Title:


                                      MORGAN GUARANTY TRUST
                                         COMPANY OF NEW YORK,
                                         as Administrative Agent


                                      By:___________________________________
                                         Name:
                                         Title:

                                       9
<PAGE>
 
                                                                       EXHIBIT A

                            PERFECTION CERTIFICATE

     The undersigned, the _________________________ of ACE US HOLDINGS, INC., a
Delaware corporation (the "BORROWER"), hereby certify with reference to the
Pledge Agreement dated as of December 11, 1997 between the Borrower and Morgan
Guaranty Trust Company of New York, as Administrative Agent (terms defined
therein being used herein as therein defined), to the Administrative Agent and
each Bank as follows:

     1.  Names. (a) The exact corporate name of the Borrower as it appears in
its certificate of incorporation is as follows:

     (b)  Set forth below is each other corporate name the Borrower has had
since its organization, together with the date of the relevant change:

     (c)  Except as set forth in Schedule 1, the Borrower has not changed its
identity or corporate structure in any way within the past five years.

     (d)  The following is a list of all other names (including trade names or
similar appellations) used by the Borrower or any of its divisions or other
business units at any time during the past five years:

     2.   Current Locations. (a) The chief executive office of the Borrower is
located at the following address:


   MAILING ADDRESS                  COUNTY                          STATE
   ---------------                  ------                          -----
<PAGE>
 
   MAILING ADDRESS                  COUNTY                          STATE
   ---------------                  ------                          -----


     (b)   The following are all the places of business of the Borrower not
identified above in the state identified above:


   MAILING ADDRESS                  COUNTY                          STATE
   ---------------                  ------                          -----


     3.  UCC Filings. A duly signed financing statement on Form UCC-1 in
substantially the form of Schedule 3(A) hereto has been duly filed in the
Uniform Commercial Code filing office in each jurisdiction identified in
paragraph 2 hereof. Attached hereto as Schedule 3(B) is a true copy of each such
filing duly acknowledged by the filing officer.

     4.  Schedule of Filings. Attached hereto as Schedule 4 is a schedule
setting forth filing information with respect to the filings described in
paragraph 4 above.

     5.  Filing Fees. All filing fees and taxes payable in connection with the
filings described in paragraph 4 above have been paid.

                                       2
<PAGE>
 
     IN WITNESS WHEREOF, we have hereunto set our hands this __ day of
_________, 199_.


                                      By: ____________________________________
                                           Name:
                                           Title:


                                      By: ____________________________________
                                           Name:
                                           Title:

                                       3
<PAGE>
 
                                                                   SCHEDULE 3(A)


                           DESCRIPTION OF COLLATERAL

                                       4
<PAGE>
 
                                                                      SCHEDULE 4


                              SCHEDULE OF FILINGS



   DEBTOR         FILING OFFICER       FILE NUMBER      DATE OF FILING /1/
- -------------    -----------------     --------------   -------------------

___________________
       Indicate lapse of date, if other than fifth anniversary.

                                       5
<PAGE>
 
                                                                       EXHIBIT C


                          SUBORDINATED LOAN AGREEMENT


     AGREEMENT dated as of December 11, 1997 among ACE US HOLDINGS, INC.
(together with its successors, the "BORROWER"), A.C.E. Insurance Company, Ltd.,
a Bermuda limited liability company (together with its respective successors and
permitted assigns, the "LENDER") and MORGAN GUARANTY TRUST COMPANY OF NEW YORK,
as Administrative Agent (the "Administrative Agent").

                             W I T N E S S E T H :

     WHEREAS the Borrower, the banks listed on the signature pages thereof (the
"BANKS"), ACE Limited, a Cayman Islands company limited by shares, as Guarantor,
and the Administrative Agent are parties to a Term Loan Agreement dated as of
December 11, 1997 (as amended from time to time the "TERM LOAN AGREEMENT");

     WHEREAS, it is a condition to the closing of the Term Loan Agreement that
the parties hereto enter into a Subordinated Loan Agreement substantially in the
form hereof; and

     WHEREAS, the Borrower will pursuant to the Pledge Agreement referred to in
the Term Loan Agreement assign to the Administrative Agent as security for its
obligations under the Term Loan Agreement all its right, title and interest in,
to and under this Agreement;

     NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

     SECTION 1. Definitions. Each term used herein which is defined in the Term
Loan Agreement shall have the meaning assigned to such term in the Term Loan
Agreement. In addition, the following terms have the following meanings:

     "Commitment" means during any period the amount set forth for such period
on Schedule 1 hereto.

     "Current Interest" has the meaning set forth in Section 4(b).
<PAGE>
 
     "Deferred Interest" has the meaning set forth in Section 4(b).

     "Reorganization Securities" has the meaning set forth in Section 5(a).

     "Senior Commitments" means, without duplication, all commitments to extend
credit and all instruments pursuant to which commitments or instruments Senior
Debt may be incurred.

     "Senior Debt" means all amounts payable with respect to the Term Loan
Agreement, which include (a) all principal of and interest (including any
interest which accrues after the commencement of any case, proceeding or other
action relating to the bankruptcy, insolvency or reorganization of the Borrower
or any of its Subsidiaries or Affiliates, whether or not allowed or allowable as
a claim in any such proceeding) on any loan under, or any note issued pursuant
to, the Term Loan, (b) all other amounts payable by the Borrower thereunder or
under any other Financing Document and (c) any amendments, restatements,
renewals, extensions or modifications of any of the foregoing.

     "Subdebt Maturity Date" means the date one year and one day after the
Termination Date.

     "Subordinated Loans" means any subordinated loans made by the Lender
pursuant to Section 2.

     "Subordinated Obligations" means all amounts payable with respect to this
Agreement, which include (a) all principal of and interest (including any
interest which accrues after the commencement of any case, proceeding or other
action relating to the bankruptcy, insolvency or reorganization of the Borrower
or any of its Subsidiaries or affiliates, whether or not allowed or allowable as
a claim in any such proceeding) on any Subordinated Loan, (b) all other amounts
payable by the Borrower hereunder or with respect hereto and (c) any amendments,
restatements, renewals, extensions or modifications of any of the foregoing.

     "Term Loan Agreement" means the Term Loan Agreement and, if the Term Loan
Agreement is refinanced or repaid in its entirety and the commitments thereunder
terminated, any successor agreement (i) pursuant to which all or any portion of
the amounts outstanding from time to time under the Term Loan Agreement are
refinanced and (ii) designated by the Borrower as a "Term Loan Agreement" for
purposes hereof.

     "Termination Date" means the later of the latest maturity date of any
Senior Debt and the latest expiration date of any Senior Commitments.

                                       2
<PAGE>
 
     SECTION 2. Obligation to Make Subordinated Loans; Guarantee by Certain
Lenders. (a) From time to time on or prior to the Termination Date, upon request
of the Borrower or, if an Event of Default under the Term Loan Agreement has
occurred or is continuing, upon request of the Administrative Agent, not less
than three business days prior to the requested date of borrowing, the Lender
agrees to make subordinated loans to the Borrower in an amount that equals the
principal amount of the loan so requested provided, that the aggregate principal
amount of the Subordinated Loans (exclusive of Deferred Interest) at any time
shall not exceed the Commitment at such time.

     (b)  Not later than 1:00 P.M. (New York City time) on the requested date of
borrowing, the Lender shall deposit in immediately available funds in an account
of the Borrower the principal amount of the Subordinated Loans to be made by the
Lender on such date.

     SECTION 3. Obligations Unconditional. The obligation of the Lender
hereunder shall be unconditional, absolute and irrevocable and, without limiting
the generality of the foregoing, shall not be released, discharged or otherwise
affected by:

     (a)  any change in the corporate existence, structure or ownership of the
Borrower or any other Person or any of their respective Subsidiaries, or any
insolvency, bankruptcy, reorganization or other similar proceeding affecting the
Borrower or any other Person or any of their assets or any resulting release or
discharge of any obligation of the Borrower or any other Person contained in any
Financing Document;

     (b)  the existence of any claim, set-off or other rights which the Lender
may have at any time against the Borrower, the Administrative Agent, any Bank or
any other Person, whether in connection herewith or any unrelated transactions,
provided that nothing herein shall prevent the assertion of any such claim by
- --------
separate suit or compulsory counterclaim; or

     (c)  any other act or omission to act or delay of any kind by the Borrower,
the Administrative Agent, any other party to any Financing Document, any Bank or
any other Person or any other circumstance whatsoever which might, but for the
provisions of this paragraph, constitute a legal or equitable discharge of or
defense to the Lender's obligations hereunder.

     SECTION 4. Terms of Subordinated Loans. (a) Maturity. Each Subordinated
Loan shall mature, and the outstanding principal amount thereof shall be due and
payable, on the Subdebt Maturity Date.

                                       3
<PAGE>
 
     (b)  Interest. The unpaid principal amount of the Subordinated Loans from
time to time outstanding (including the unpaid principal amount of all
Subordinated Loans and all amounts representing Deferred Interest) shall bear
interest at a rate per annum (based upon a 365/366 day year) equal to 10%,
provided, however, that the Borrower shall be obligated to pay currently (in
- --------  -------
accordance with the terms of this Agreement) only such portion of such interest
that accrues on the principal amount of the Subordinated Loans (exclusive of
capitalized interest) at a rate per annum equal to 4% (herein "Current
Interest"), with all remaining interest that accrues at a rate per annum equal
to 6% being deferred and capitalized as principal outstanding under this
Agreement (herein "Deferred Interest"), which Deferred Interest (together with
all interest thereon) shall be due and payable on the Subdebt Maturity Date;
provided, further, however, that in the event that any principal or interest
- --------  -------
under this Agreement is not paid when due (whether by acceleration or
otherwise), the interest rate applicable to the unpaid principal amount
outstanding under this Agreement (including the unpaid principal amount of all
Subordinated Loans and all amounts representing Deferred Interest) shall be at a
rate per annum equal to 12% (with all such accrued interest payable upon demand
in accordance with the terms of this Agreement) until such unpaid principal or
interest is paid.

     Subject to Sections 5 and 6 hereof and Section 5.14 of the Term Loan
Agreement, accrued Current Interest on the unpaid principal amount of this
Agreement from time to time outstanding (including the unpaid principal amount
of all Subordinated Loans and all amounts representing Deferred Interest) shall
be payable on the last day of each calendar quarter, on the date of any
prepayment of principal, and at maturity (including on the Subdebt Maturity
Date), commencing with the first of such dates to occur after the date hereof.
After maturity (whether by acceleration or otherwise), accrued Current Interest
on the unpaid principal amount outstanding under this Agreement (including the
unpaid principal amount of all Subordinated Loans and all amounts representing
Deferred Interest) shall be payable on demand subject to Sections 5 and 6 hereof
and Section 5.14 of the Term Loan Agreement.

     (c)  Optional Prepayments. Subject to Section 5.14 of the Term Loan
Agreement, the Borrower may at any time, upon at least one Domestic Business
Day's notice, prepay all or any portion of the principal of, or accrued interest
on, any Subordinated Loan. Any such prepayment shall be applied to prepay
ratably the principal of, or accrued interest on, the Subordinated Loans of the
Lender outstanding at such time.

     SECTION 5. Restrictions While Senior Debt or Senior Commitments Are
Outstanding. (a) The Lender acknowledges and agrees that (i) the Term Loan
restricts the ability of the Borrower to make payments in respect of
Subordinated

                                       4
<PAGE>
 
Obligations and (ii) should the Lender collect or receive, directly or
indirectly, any payment of any kind or character, whether in cash or property in
respect of any Subordinated Obligations (and whether by way of payment of
principal or interest, redemption, purchase, other acquisition, dividend,
distribution, guarantee, grant of a security interest, realization of security
or the proceeds thereof, set-off, exercise of contractual or statutory rights or
otherwise), (x) at a time when such payment is prohibited by the terms of the
Term Loan Agreement, (y) through exercise of remedies permitted under Section
5(c) at any time while any Senior Debt or any Senior Commitment is outstanding
or (z) in the event of any insolvency or bankruptcy proceeding or any
receivership, liquidation, reorganization or other similar proceeding in
connection therewith, relative to the Borrower or to any of its creditors, in
their capacity as creditors of the Borrower, or to substantially all of its
property, and in the event of any proceedings for voluntary liquidation,
dissolution or other winding up of the Borrower, whether or not involving
insolvency or bankruptcy, the Lender will forthwith deliver the same to the
Administrative Agent (or other representatives of the holders of Senior Debt)
for the equal and ratable benefit of the holders of Senior Debt in precisely the
form received (except for the endorsement or the assignment of or by the Lender
where necessary) for application to payment of all Senior Debt in full, after
giving effect to any concurrent payment or distribution to the holders of Senior
Debt and, until so delivered, the same shall be held in trust by the Lender as
the property of the holders of Senior Debt; provided that the Lender may receive
                                            --------  
and hold securities of the Borrower (or any successor entity) in a
reorganization of the Borrower effected pursuant to a plan of reorganization
which has given effect to the subordination provisions set forth in this
Agreement (without amendment, waiver or modification of any of the terms
hereof), so long as such securities are subordinated to the Senior Debt at least
to the same extent as the Subordinated Obligations (any such securities,
"Reorganization Securities").

     (b)  Unless and until all Senior Debt shall have been paid in full and all
Senior Commitments shall have terminated or been canceled, neither the Borrower
nor any of its Subsidiaries or Affiliates shall make, and the Lender shall not
demand, accept or receive, or shall attempt to collect or commence any legal
proceedings to collect, any direct or indirect payment (in cash or property or
by setoff, exercise of contractual or statutory rights or otherwise) of or on
account of any amount payable on or with respect to any Subordinated Obligations
(including any payment in respect of redemption or purchase or other
acquisition), except that (i) the Borrower may make payments with respect to the
Subordinated Obligations if such payments are permitted under Section 5.14 of
the Term Loan Agreement, and (ii) as expressly permitted under Section 5(c).

     (c)  Unless and until all Senior Debt shall have been paid in full and all
Senior Commitments shall have terminated or been canceled, the Lender will not

                                       5
<PAGE>
 
commence or maintain any action, suit or any other legal or equitable proceeding
against the Borrower or any of its Subsidiaries, or join with any creditor in
any such proceeding; provided that nothing in this Section 5(c) will preclude
                     --------
the Lender (i) from commencing at any time any action, suit or any other legal
or equitable proceeding to enforce any remedies to which the Lender is entitled
hereunder if at such time the holders of Senior Debt have commenced an action,
suit or proceeding to enforce substantially similar remedies, (ii) from joining
with any creditor in any such proceeding, under any insolvency, bankruptcy,
receivership, liquidation, reorganization or other similar proceeding if the
holders of Senior Debt have joined in any such proceeding or (iii) from
asserting a compulsory counterclaim in any action, suit or proceeding to which
the Borrower is a party; provided that nothing in this clause(iii) shall be
                         --------
construed to permit the Lender to enforce any judgement obtained with respect to
such compulsory counterclaim or receive any payment pursuant thereto except as
expressly permitted by other provisions of this Agreement.

     (d)  The Lender hereby waives any and all notice in respect of the Term
Loan Agreement and agrees and consents that without notice to or assent by the
Lender:

           (i)   the obligations and liabilities of the Borrower or any other
     party or parties to the Term Loan Agreement (or any promissory note,
     security document or guaranty evidencing or securing the same) may, from
     time to time, in whole or in part, be renewed, extended, modified, amended,
     restated, accelerated, compromised, supplemented, terminated, sold,
     exchanged, waived or released;

           (ii)  the Administrative Agent and the Banks may exchange, release or
     surrender any collateral to the Borrower or any other Person, waive,
     release or subordinate any security interest, obtain a guaranty of any
     Person or a security interest in or mortgage or other encumbrance on any
     additional property as collateral for any obligations of the Borrower in
     its sole discretion may elect;

           (iii) the Administrative Agent and the Banks may apply payments by
     the Borrower or any other Person to such portion of the Secured Obligations
     (as defined in the Pledge Agreement) as they in their sole discretion may
     elect;

           (iv)  the Administrative Agent and the Banks may exercise or refrain
     from exercising any right, remedy or power granted by or in connection with
     the Term Loan Agreement, any other Financing Documents or any other
     agreements relating thereto; and

                                       6
<PAGE>
 
          (v) any Bank or the Administrative Agent may surrender or release,
     from time to time, in whole or in part, any balance or balances of funds
     with the Administrative Agent or any Bank at any time standing to the
     credit of the Borrower;

all as the Administrative Agent or the Banks may deem advisable and all without
impairing, abridging, diminishing, releasing or affecting the obligations of the
Borrower and the Lender hereunder.

     SECTION 6. Dissolution, Liquidation or Reorganization of the Borrower.

     (a) In the event of any insolvency or bankruptcy proceedings, and any
receivership, liquidation, reorganization or other similar proceedings in
connection therewith, relative to the Borrower or to any of its creditors, in
their capacity as creditors of the Borrower, or to substantially all of its
property, and in the event of any proceedings for voluntary liquidation,
dissolution or other winding up of the Borrower, whether or not involving
insolvency or bankruptcy, then:

          (i) the holders of the Senior Debt shall first be entitled to receive
     payment in full in cash of the principal thereof, premium, if any, interest
     and all other amounts payable thereon (accruing before and after the
     commencement of the proceedings) before the Lender is entitled to receive
     any payment on account or in respect of Subordinated Obligations; provided
                                                                       --------
     that nothing in this clause (i) shall prevent the Lender from receiving or
     holding Reorganization Securities; and

          (ii) any payment or distribution of assets of the Borrower of any kind
     or character, whether in cash, property or securities to which the Lender
     would be entitled, but for the provisions of this Section 6, shall be paid
     or distributed by the liquidating trustee or agent or other Person making
     such payment or distribution, whether a trustee in bankruptcy, a receiver
     or liquidating trustee or other trustee or agent, directly to the
     Administrative Agent and any other representative on behalf of the holders
     of Senior Debt to the extent necessary to make payment in full of all
     amounts of Senior Debt remaining unpaid, after giving effect to any
     concurrent payment or distribution to the holders of the Senior Debt;
     provided that nothing in this clause (ii) shall prevent the Lender from
     --------
     receiving or holding Reorganization Securities.

     (b) The Lender shall not be subrogated to the rights of the holders of the
Senior Debt to receive payments or distributions of assets of the Borrower until
all

                                       7
<PAGE>
 
Senior Debt shall have been paid in full and all Senior Commitments shall have
terminated or been canceled; and, for the purposes of such subrogation, no
payments or distributions to the holders of the Senior Debt of any cash,
property or securities to which the Lender would be entitled except for these
provisions shall, as between the Borrower, its creditors other than the holders
of the Senior Debt, and the Lender, be deemed to be a payment by the Borrower to
or on account of the Senior Debt. The provisions of Sections 5 and 6 of this
Agreement are and are intended solely for the purpose of defining the relative
rights of the Lender, on the one hand, and the holders of the Senior Debt, on
the other hand.

     (c)  Upon payment in full of all Senior Debt and the termination or
cancellation of all Senior Commitments, the Lender shall be subrogated to the
rights of the holders of Senior Debt to receive payments or distributions of
cash, property or securities of the Borrower applicable to the Senior Debt until
all amounts owing on the Subordinated Obligations shall be paid in full. For
purposes of such subrogation, no payments or distributions to the holder of the
Subordinated Obligations of cash, property, securities or other assets by virtue
of the subrogation herein provided which otherwise would have been made to the
holders of the Senior Debt shall, as between the Borrower, its creditors other
than the holders of Senior Debt and the holder of the Subordinated Obligations,
be deemed to be a payment to or on account of the Subordinated Obligations. The
Lender agrees that, in the event that all or any part of any payment made on
account of the Senior Debt is recovered from the holders of Senior Debt as a
preference, fraudulent transfer or similar payment under any bankruptcy,
insolvency or similar law, any payment or distribution received by the Lender on
account of the Subordinated Obligations at any time after the date of the
payment so recovered, whether pursuant to the right of subrogation provided for
in this Section 6(c) or otherwise, shall be deemed to have been received by such
holder of Subordinated Obligations in trust as the property of the holders of
the Senior Debt and such holders shall forthwith deliver the same to the
Administrative Agent for the equal and ratable benefit of the holders of the
Senior Debt for application to payment of all Senior Debt in full.

     (d)  The provisions of Sections 5 and 6 of this Agreement are applicable by
their terms to the Lender in its capacity as holder of the Subordinated
Obligations, and shall not affect any right or claim the Lender may have against
the Borrower or any of its Subsidiaries with respect to any obligation owed by
the Borrower or any of its Subsidiaries to the Lender other than the
Subordinated Obligations and any claim arising under, or with respect to, the
Subordinated Obligations and this Agreement.

     SECTION 7. Representations and Warranties of Lender. The Lender represents
and warrants that:

                                       8
<PAGE>
 
     (a)  The execution, delivery and performance by the Lender of this
Agreement require no action by or in respect of, or filing with, any
governmental body, agency or official, do not contravene, or constitute a
default under, any provision of applicable law or regulation, or of any
agreement, instrument, judgment, injunction, order or decree binding upon the
Lender or result in the creation or imposition of any Lien on any asset of the
Lender.

     (b)  This Agreement constitutes a valid and binding agreement of the
Lender, enforceable against the Lender in accordance with its terms.

     SECTION 8. Governing Law; Consent to Jurisdiction. (a) This Agreement shall
be governed by and construed in accordance with the laws of the State of New
York.

     (b)  EACH PARTY HERETO HEREBY IRREVOCABLY SUBMITS TO THE JURISDICTION OF
ANY FEDERAL COURT SITTING IN THE CITY OF NEW YORK AND, IN THE EVENT THAT
JURISDICTION CANNOT BE OBTAINED OR MAINTAINED IN A FEDERAL COURT, TO THE
JURISDICTION OF ANY NEW YORK STATE COURT SITTING IN THE CITY OF NEW YORK FOR
PURPOSES OF ANY SUIT, ACTION OR OTHER PROCEEDING ARISING OUT OF OR IN CONNECTION
WITH THIS AGREEMENT THAT MAY BE BROUGHT OR INSTITUTED AGAINST IT. EACH PARTY
HERETO HEREBY IRREVOCABLY WAIVES AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL
PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED HEREBY.

     (c)  Each of the Borrower and the Lender hereby irrevocably designates and
appoints CT Corporation System having an office on the date hereof at 1633
Broadway, New York, New York 10019 as its authorized agent, to accept and
acknowledge on its behalf, service of any and all process which may be served in
any suit, action or proceeding of the nature referred to in subsection 8(b)
above until the Commitment shall have terminated and the Subordinated
Obligations shall have been paid in full in accordance with the provisions
hereof. Each of the Borrower and the Lender represents and warrants that such
agent has agreed in writing to accept such appointment and that a true copy of
such designation and acceptance has been delivered to the Administrative Agent.

     SECTION 9. Notices. All notices, requests and other communications to any
party hereunder shall be given at the address, facsimile number or telex number
of such party set forth on the signature pages hereof (or at such other

                                       9
<PAGE>
 
address as such party shall specify for such purpose from time to time by notice
to all other parties hereto) and shall be effective upon receipt.

     SECTION 10. Successors and Assigns. The covenants of the Lender contained
herein shall be binding upon the Lender and upon its respective heirs, legal
representatives, successors and assigns. The Lender agrees that it will not
assign, pledge or otherwise transfer, for security purposes or otherwise, any
interest in the Subordinated Obligations held by it unless (i) the Borrower and
the Administrative Agent (with the prior written consent of the Required Banks)
shall have given their prior written consent to such transfer and (ii) the
transferee thereof expressly acknowledges and agrees in a writing delivered to
the Administrative Agent that the transfer is made subject to the terms of this
Agreement and further agrees to be bound by the terms hereof. This Agreement is
for the benefit of the holders of Senior Debt and their respective successors
and assigns, and the Lender acknowledges that each of the Administrative Agent
and each Bank has relied upon the obligations of the Lender hereunder in
entering into the Term Loan Agreement.

     SECTION 11. Counterparts. This Agreement may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

                                      10
<PAGE>
 
                                                                      SCHEDULE 1



                 Period                                        Commitment       
                 ------                                        ----------       
          Borrowing Date to but not                           $ 35,000,000      
          including the first anniversary of                                    
          the Borrowing Date                                                    
                                                                                
          First anniversary of the Borrowing                  $ 65,000,000      
          Date to but not including the                                         
          second anniversary of the                                             
          Borrowing Date                                                        
                                                                                
          Second anniversary of the                            $95,000,000      
          Borrowing Date to but not                                             
          including the third anniversary of                                    
          the Borrowing Date                                                    
                                                                                
          Third anniversary of the                            $120,000,000      
          Borrowing Date to but not                                             
          including the fourth anniversary                                      
          of the Borrowing Date                                                 
                                                                                
          Fourth anniversary of the                           $130,000,000      
          Borrowing Date to but not                                             
          including the fifth anniversary of                                    
          the Borrowing Date                                                    
                                                                                
          Fifth anniversary of the                            $140,000,000      
          Borrowing Date to but not                                             
          including the sixth anniversary of                                    
          the Borrowing Date                                                    
                                                                                
          Sixth anniversary of the                            $150,000,000      
          Borrowing Date to but not                                             
          including the seventh anniversary                                     
          of the Borrowing Date                                                 
                                                                                
          On and after the seventh                            $160,000,000      
          anniversary of the Borrowing                  
          Date                                           
                                            
                                      11
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed as of the date first above written.

                                        ACE US HOLDINGS, INC.


                                        By___________________________
                                          Name:
                                          Title:

                                        MORGAN GUARANTY TRUST 
                                          COMPANY OF NEW YORK, as
                                          Administrative Agent


                                        By___________________________ 
                                          Name:
                                          Title:

                                        A.C.E. INSURANCE COMPANY,
                                          LTD.



                                        By___________________________
                                          Name:
                                          Title:

The Common Seal of A.C.E. Insurance Company, Ltd.
was hereunto affixed in the presence of:

Director


_______________________________

Director/Secretary


_______________________________

                                      12
<PAGE>
 
                                                                       EXHIBIT G


                     FORM OF DAVIS POLK & WARDWELL OPINION
                     -------------------------------------



To the Banks and the Administrative Agent
 Referred to Below
c/o Morgan Guaranty Trust Company
 of New York, as Administrative Agent
60 Wall Street
New York, New York 10260-0060

Ladies and Gentlemen:

     We have participated in the preparation of the Term Loan Agreement (the
"Loan Agreement") dated as of December 11, 1997 among ACE US Holdings, Inc., a
Delaware corporation, as Borrower, ACE Limited, a Cayman Islands company limited
by shares, as Guarantor, the Banks listed on the signature pages thereof (the
"Banks") and Morgan Guaranty Trust Company of New York, as Administrative Agent,
and have acted as special United States counsel for the Agents for the purpose
of rendering this opinion pursuant to Section 3.01(e) of the Loan Agreement.
Terms defined in the Loan Agreement are used herein as therein defined.

     We have examined originals or copies, certified or otherwise identified to
our satisfaction, of such documents, corporate records, certificates of public
officials and other instruments and have conducted such other investigations of
fact and law as we have deemed necessary or advisable for purposes of this
opinion.

     Upon the basis of the foregoing, we are of the opinion that:

     1.   The execution, delivery and performance by the Borrower of the Loan
Agreement and the Notes are within the Borrower's corporate powers and have been
duly authorized by all necessary corporate action.

     2.   The execution, delivery and performance by the Guarantor of the Loan
Agreement are within the Guarantor's corporate powers and have been duly
authorized by all necessary corporate action.
<PAGE>
 
     3.   The Loan Agreement constitutes a valid and binding agreement of the
Borrower and each Note constitutes a valid and binding obligation of the
Borrower, in each case enforceable in accordance with its terms, except as the
same may be limited by bankruptcy, insolvency or similar laws affecting
creditors' rights generally and by general principles of equity.

     4.   The Loan Agreement constitutes a valid and binding agreement of the
Guarantor enforceable in accordance with its terms, except as the same may be
limited by bankruptcy, insolvency or similar laws affecting creditors' rights
generally and by general principles of equity.

     In giving the foregoing opinion we have relied, with your consent and
without independent investigation, as to all matters governed by the laws of the
Cayman Islands, upon the opinion of Maples and Calder dated the date hereof, a
copy of which has been delivered by you pursuant to Section 3.01(b) of the Loan
Agreement.

     This opinion is rendered solely to you in connection with the above matter.
This opinion may not be relied upon by you for any other purpose or relied upon
by any other Person without our prior written consent.

                                        Very truly yours,

                                       2
<PAGE>
                                    
                                                                       EXHIBIT H


                      ASSIGNMENT AND ASSUMPTION AGREEMENT


     AGREEMENT dated as of __________ __, 19__ among [ASSIGNOR] (the
"Assignor"), [ASSIGNEE] (the "Assignee"), ACE Limited, ACE US Holdings, Inc.
("ACE US"), A.C.E. Insurance Company, Ltd ("ACE Insurance") and MORGAN GUARANTY
TRUST COMPANY OF NEW YORK, as Issuing Bank and as Administrative Agent (the
"Administrative Agent").

                              W I T N E S S E T H
                              - - - - - - - - - -  

     WHEREAS, this Assignment and Assumption Agreement (the "Assignment
Agreement") relates to (i) the Five-Year Credit Agreement (as amended from time
to time, the "Five Year Credit Agreement") and the 364-Day Credit Agreement (as
amended from time to time, the "364-Day Credit Agreement") each dated as of
December 11, 1997 among ACE Limited, as Borrower, A.C.E. Insurance Company,
Ltd., Corporate Officers & Directors Assurance Ltd. and Tempest Reinsurance
Company Limited, as Guarantors, the Assignor and the other Banks party thereto,
as Banks, and the Administrative Agent, (ii) the Term Loan Agreement (as amended
from time to time, the "Term Loan Agreement") the dated as of December 11, 1997
among ACE US, as Borrower, ACE Limited, as Guarantor, the Assignor and the other
Banks party thereto, as Banks, and the Administrative Agent and (iii) the
Amended and Restated Reimbursement Agreement dated as of December 11, 1997 among
ACE Insurance, the Assignor and the other Banks party thereto and the
Administrative Agent (the "Reimbursement Agreement" and together with the Five-
Year Credit Agreement, the 364-Day Credit Agreement and the Term Loan Agreement,
collectively, the "Facilities");

     WHEREAS, under the Five-Year Credit Agreement, the Assignor has a
Commitment to make Loans to ACE Limited and participate in Letters of Credit in
an aggregate principal amount at any time outstanding not to exceed $__________;

     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the 
Five-Year Credit Agreement in the aggregate principal amount of $__________ are
outstanding at the date hereof;
<PAGE>
 
     WHEREAS, Letters of Credit with a total amount available for drawing under
the Five-Year Credit Agreement of $____________ are outstanding at the date
hereof;

     WHEREAS, under the 364-Day Credit Agreement, the Assignor has a Commitment
to make Loans to ACE Limited in an aggregate principal amount at any time
outstanding not to exceed $_________;

     WHEREAS, Committed Loans made to ACE Limited by the Assignor under the 364-
Day Credit Agreement in the aggregate principal amount of $_________ are
outstanding at the date hereof;

     WHEREAS, under the Term Loan Agreement, the Assignor has [a Commitment to
make][outstanding] Loans to ACE US in an aggregate principal amount of
$_____________ at the date hereof;

     WHEREAS, pursuant to the Reimbursement Agreement, the Assignor is a
participant to the extent of _____% in up to (pound)153,584,466 of Letters of
Credit outstanding thereunder;

     WHEREAS, the Assignor proposes to assign to the Assignee an aggregate
interest in the Facilities of $__________, comprised as follows: (i) all of the
rights of the Assignor under the Five-Year Credit Agreement in respect of a
portion of its Commitment thereunder in an amount equal to $__________ (the
"Five-Year Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans and Letter of Credit Liabilities thereunder, (ii)
all of the rights of the Assignor under the 364-Day Credit Agreement in respect
of a portion of its Commitment thereunder in an amount equal to $_____________
(the "364-Day Assigned Amount"), together with a corresponding portion of its
outstanding Committed Loans thereunder, (iii) all of the rights of the Assignor
under the Term Loan Agreement in respect of a portion of its [Commitment]
[Loans] thereunder in an amount equal to $_______________ (the "Term Loan
Assigned Amount" and, together with the Five-Year Assigned Amount and the 364-
Day Assigned Amount, collectively the "Assigned Amounts"), and (iv) a portion of
the rights and obligations of the Assignor under the Reimbursement Agreement
equivalent to a Participation Percentage of ____% (the "Assigned Percentage"),
and the Assignee proposes to accept assignment of such rights and assume the
corresponding obligations from the Assignor on such terms;

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

                                       2
<PAGE>
 
     SECTION 1. Definitions. All capitalized terms not otherwise defined herein
shall have the respective meanings set forth in the Five-Year Credit Agreement,
the 364-Day Credit Agreement, the Term Loan Agreement and the Reimbursement
Agreement, as applicable.

     SECTION 2. Assignment. The Assignor hereby assigns and sells to the
Assignee all of the rights of the Assignor under each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement and the Term Loan Agreement to the
extent of the Five-Year Assigned Amount, the 364-Day Assigned Amount and the
Term Loan Assigned Amount, respectively, and under the Reimbursement Agreement
to the extent of the Assigned Percentage, and the Assignee hereby accepts such
assignment from the Assignor and assumes all of the obligations of the Assignor
under each of the Five-Year Credit Agreement, the 364-Day Credit Agreement and
the Term Loan Agreement to the extent of the Five-year Assigned Amount, the 364-
Day Assigned Amount and the Term Loan Assigned Amount and under the
Reimbursement Agreement to the extent of the Assigned Percentage, including the
purchase from the Assignor of the corresponding portion of the principal amount
of the Committed Loans made by the Assignor and Letter of Credit Liabilities of
and the corresponding portion of the participating interests of the Assignor in
the Letters of Credit under the Reimbursement Agreement, outstanding at the date
hereof. Upon the execution and delivery hereof by the Assignor, the Assignee,
ACE Limited, ACE US, ACE Insurance, the Issuing Bank(s) and the Administrative
Agent and the payment of the amounts specified in Section 3 required to be paid
on the date hereof (i) the Assignee shall, as of the date hereof, succeed to the
rights and be obligated to perform the obligations of the Assignor under each of
the Five-Year Credit Agreement, the 364-Day Credit Agreement and the Term Loan
Agreement with a Commitment in an amount equal to the Five-Year Assigned Amount,
the 364-Day Assigned Amount and the Term Loan Assigned Amount, respectively and
under the Reimbursement Agreement to the extent of the Assigned Percentage, and
(ii) the Commitment of the Assignor under each of the Facilities and the
Participation Percentage of the Assignor under the Reimbursement Agreement
shall, as of the date hereof, be reduced by the corresponding amount and the
Assignor released from its obligations under each of the Five-Year Credit
Agreement, the 364-Day Credit Agreement, the Term Loan Agreement and the
Reimbursement Agreement to the extent such obligations have been assumed by the
Assignee. The assignment provided for herein shall be without recourse to the
Assignor.

     SECTION 3. Payments. As consideration for the assignment and sale
contemplated in Section 2 hereof, the Assignee shall pay to the Assignor on the

                                       3
<PAGE>
 
date hereof in Federal funds the amount heretofore agreed between them.* It is
understood that ticking and/or facility fees accrued to the date hereof are for
the account of the Assignor and such fees accruing from and including the date
hereof are for the account of the Assignee. Each of the Assignor and the
Assignee hereby agrees that if it receives any amount under any Related Document
which is for the account of the other party hereto, it shall receive the same
for the account of such other party to the extent of such other party's interest
therein and shall promptly pay the same to such other party.

     SECTION 4. Consents. This Agreement is conditioned upon the consent of the
Administrative Agent and the Issuing Bank(s) and ACE Limited, ACE US and ACE
Insurance, pursuant to Section 10.06 of each of the Five-Year Credit Agreement,
the 364-Day Credit Agreement and the Term Loan Agreement and Section 8.06(c) of
the Reimbursement Agreement. The execution of this Agreement by such persons is
evidence of such consents. Pursuant to Section 10.06 of each of the 364-Day
Credit Agreement, the Five-Year Credit Agreement and the Term Loan Agreement,
each of ACE Limited and ACE US, respectively, agrees to execute and deliver a
Note payable to the order of the Assignee to evidence the assignment and
assumption provided for herein.

     SECTION 5. Non-reliance on Assignor. The Assignor makes no representation
or warranty in connection with, and shall have no responsibility with respect
to, the solvency, financial condition, or statements of any of ACE Limited and
its subsidiaries or the validity and enforceability of the obligations of ACE
Limited and its subsidiaries under the Related Documents. The Assignee
acknowledges that it has, independently and without reliance on the Assignor,
and based on such documents and information as it has deemed appropriate, made
its own credit analysis and decision to enter into this Agreement and will
continue to be responsible for making its own independent appraisal of the
business, affairs and financial condition of ACE Limited and its subsidiaries.

     SECTION 6. Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of the State of New York.

     SECTION 7. Counterparts. This Agreement may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

__________________

     *Amount should combine principal together with accrued interest and
breakage compensation, if any, to be paid by the Assignee, net of any portion of
any up front fee to be paid by the Assignor to the Assignee.

                                       4
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
and delivered by their duly authorized officers as of the date first above
written.

                                   [ASSIGNOR]


                                   By______________________________
                                     Title:


                                   [ASSIGNEE]


                                   By______________________________ 
                                     Title:


                                   ACE LIMITED


                                   By______________________________
                                     Title:


                                   ACE US HOLDINGS, INC.


                                   By______________________________
                                     Title:


                                   A.C.E. INSURANCE COMPANY, LTD.


                                   By______________________________
                                     Title:

                                       5
<PAGE>
 
                                   MORGAN GUARANTY TRUST
                                     COMPANY OF NEW YORK, as Issuing
                                     Bank and as Administrative Agent



                                   By_____________________________
                                     Title:

                                       6
<PAGE>
 
                                                                       EXHIBIT I


                            [CT Corporation System]


                                        December 11, 1997


To the Persons Identified on
on Schedule A Attached Hereto:

     We have reviewed (i) the Five-Year Credit Agreement dated as of December
11, 1997 (the "Five-Year Credit Agreement") and the 364-Day Credit Agreement
(the "364-Day Credit Agreement") each among ACE Limited, as Borrower, A.C.E.
Insurance Company, Ltd., Corporate Officers & Directors Assurance Ltd. and
Tempest Reinsurance Company Limited, as Guarantors, the Banks listed therein,
and Morgan Guaranty Trust Company of New York, as Administrative Agent, (ii) the
Term Loan Agreement (the "Term Loan Agreement") dated as of December 11, 1997
among ACE US Holdings, Inc., as Borrower, ACE Limited, as Guarantor, the Banks
listed therein and Morgan Guaranty Trust Company of New York, as Administrative
Agent, (iii) the Subordinated Loan Agreement dated as of December 11, 1997 (the
"Subordinated Loan Agreement") among ACE US Holdings, Inc., as Borrower, A.C.E.
Insurance Company, Ltd., as Lender and Morgan Guaranty Trust Company of New
York, as Administrative Agent and (iv) the Amended and Restated Reimbursement
Agreement dated as of December 11, 1997 among A.C.E. Insurance Company, Ltd., as
Account Party, the Banks listed therein and Morgan Guaranty Trust Company of New
York, as Issuing Bank and Agent (the "Amended and Restated Reimbursement
Agreement" and together with the Five- Year Credit Agreement, the 364-Year
Credit Agreement, the Term Loan Agreement and the Subordinated Loan Agreement,
collectively, the "Agreements"), in each of which CT Corporation System is named
as agent to receive service of process in the State of New York on behalf of (a)
the Borrower and each Guarantor under each of the Five-Year Credit Agreement and
the 364- Day Credit Agreement, (b) the Borrower and the Guarantor under the Term
Loan Agreement, (c) the Borrower and the Lender under the Subordinated Loan
Agreement and (d) the Account Party under the Amended and Restated Reimbursement
Agreement, at the address of 1633 Broadway, New York, New York 10019. Upon
review of our appointment outlined in Section 10.10(b) of each of the 364-Day
Credit Agreement, the Five-Year Credit Agreement and the 
<PAGE>
 
Term Loan Agreement, Section 8(c) of the Subordinated Loan Agreement and Section
8.10(b) of the Amended and Restated Reimbursement Agreement, we understand that
our role as registered agent is confined to receiving service of process only.
We also understand that the term of our appointment as registered agent under
each such Agreements shall remain in effect until each of the Agreements shall
have been terminated and all obligations thereunder of each Borrower, each
Guarantor, the Lender and the Account Party shall have been paid in full, or
until such time as we are instructed in writing by the Administrative Agent to
discontinue our service.

     We accept and confirm our appointment as registered agent and we understand
that any notice or process received by us in our capacity as registered agent
shall be promptly sent by telephone, fax, telex, cable or any other means of
instant communication, and thereafter by reputable overnight carrier to:

     On Behalf of the Borrower and each Guarantor under each of the 364-Day
Credit Agreement and the Five-Year Credit Agreement and the Guarantor under the
Term Loan Agreement:

                                        ACE Limited
                                        The ACE Building
                                        30 Woodbourne Avenue
                                        Hamilton HM 08, Bermuda

                                        (Fax 441-295-5221)

                                          with copy to:

                                        Morgan Guaranty Trust
                                        Company of New York
                                        60 Wall Street
                                        New York, NY 10260-0060

                                        (Fax 212-648-5249)

     On behalf of the Borrower under the Term Loan Agreement and the
Subordinated Loan Agreement

                                       2
<PAGE>
 
                                        ACE US Holdings, Inc.

                                        Atlanta, GA 30374

                                          with copy to:

                                        Morgan Guaranty Trust
                                          60 Wall Street
                                          New York, NY 10260-0060
                                          (Fax 212-648-5249)

     On behalf of the Account Party under the Amended and Restated Reimbursement
Agreement and the Lender under the Subordinated Loan Agreement

                                        A.C.E. Insurance Company, Ltd.
                                        The ACE Building
                                        30 Woodbourne Avenue
                                        Hamilton HM 08, Bermuda
                                        (Fax 441-295-5221)

                                          with copy to:
                                        Morgan Guaranty Trust
                                        Company of New York
                                        60 Wall Street
                                        New York, NY 10260-0060
                                        (Fax 212-648-5249)

     We appreciate this opportunity to be of service.

                                          Very truly yours,


                                        CT CORPORATION SYSTEM


                                          ___________________________
                                        By:
                                        Title:

                                       3
<PAGE>
 
                                                                      SCHEDULE A



Morgan Guaranty Trust Company
of New York, as Issuing Bank
and as Administrative Agent

Morgan Guaranty Trust Company
of New York

Mellon Bank, N.A.

Citibank, N.A.

The Bank of New York

The Bank of Tokyo-Mitsubishi, Ltd.

Barclays Bank PLC

Deutsche Bank AG, New York and/or
  Cayman Islands Branch

Fleet National Bank

ING Bank, N.V.

Royal Bank of Canada

Bank of Bermuda (Luxembourg) S.A.

Banque Nationale de Paris

The Chase Manhattan Bank

Credit Lyonnais New York Branch

Dresdner Bank A.G., New York Branch and
  Grand Cayman Branch

The First National Bank of Chicago

                                       4
<PAGE>
 
State Street Bank and Trust Company

ACE Limited, as Borrower under the
364-Day Credit Agreement and the
Five-Year Credit Agreement and as
Guarantor under the Term Loan Agreement

A.C.E. Insurance Company, Ltd., as Guarantor
under the 364-Day Credit Agreement and
the Five-Year Credit Agreement, as
Account Party under the Amended and Restated
Reimbursement Agreement and as Lender under
the Subordinated Loan Agreement

Corporate Officers & Directors
Assurance Ltd., as Guarantor under
the 364-Day Credit Agreement and
the Five-Year Credit Agreement

Tempest Reinsurance Company Limited,
as Guarantor under the 364-Day Credit
Agreement and the Five-Year Credit
Agreement

ACE US Holdings, Inc., as Borrower under
the Term Loan Agreement and as Borrower
under the Subordinated Loan Agreement

                                       5

<PAGE>
 
                                                                   EXHIBIT 11.1
 
                         ACE LIMITED AND SUBSIDIARIES
 
                   COMPUTATION OF EARNINGS (LOSS) PER SHARE
 
<TABLE>
<CAPTION>
                                        YEAR ENDED SEPTEMBER 30,
                         -------------------------------------------------------
                            1997       1996       1995       1994        1993
                         ---------- ---------- ---------- ----------  ----------
                           (IN THOUSANDS OF U.S. DOLLARS EXCEPT SHARE AND PER
                                              SHARE DATA)
<S>                      <C>        <C>        <C>        <C>         <C>
Earnings (loss) per
 share Primary
Weighted average
 Ordinary Shares
 outstanding............ 56,606,877 49,275,027 46,859,168 48,202,545  40,619,319
Average stock options
 outstanding (net of
 repurchased shares
 under the treasury
 stock method) (i)......    886,794    538,601    199,838        --       21,944
                         ---------- ---------- ---------- ----------  ----------
Weighted average
 Ordinary shares and
 ordinary share
 equivalents
 outstanding............ 57,493,671 49,813,628 47,059,006 48,202,545  40,641,263
                         ========== ========== ========== ==========  ==========
Net income (loss)....... $  461,354 $  289,733 $  237,566 $  (45,678) $  223,547
                         ---------- ---------- ---------- ----------  ----------
Earnings (loss) per
 share.................. $     8.02 $     5.82 $     5.05 $    (0.95) $     5.50
                         ========== ========== ========== ==========  ==========
Earnings (loss) per
 share Assuming full
 dilution
Weighted average
 Ordinary shares
 outstanding............ 56,606,877 49,275,027 46,859,168 48,202,545  40,619,319
Average stock options
 outstanding (net of
 repurchased shares
 under the treasury
 stock method) (i)......  1,322,417    717,156    199,838        --      414,744
                         ---------- ---------- ---------- ----------  ----------
Weighted average
 Ordinary shares and
 ordinary share
 equivalents
 outstanding............ 57,929,294 49,992,183 47,059,006 48,202,545  41,034,063
                         ========== ========== ========== ==========  ==========
Net income (loss)....... $  461,354 $  289,733 $  237,566 $  (45,678) $  223,547
                         ---------- ---------- ---------- ----------  ----------
Earnings (loss) per
 share.................. $     7.96 $     5.79 $     5.05 $    (0.95) $     5.45
                         ========== ========== ========== ==========  ==========
</TABLE>
 
  The number of shares for all periods presented have been adjusted to reflect
the eight-for-one stock split effective January 14, 1993.
- --------
(i) In 1994, the inclusion of stock options in the loss per share calculations
    would be antidilutive.
 
                                      36

<PAGE>
 
ACE LIMITED AND SUBSIDIARIES

                                                                    Exhibit 13.1

                            SELECTED FINANCIAL DATA

     The following table sets forth selected consolidated financial data of the
Company as of and for each of the years in the five year period ended September
30, 1997. These selected financial and other data should be read in conjunction
with the consolidated financial statements and related notes and with
"Management's Discussion and Analysis of Results of Operations and Financial
Condition" presented on pages 32 to 53 and 21 to 31 respectively, of this annual
report.

<TABLE> 
<CAPTION> 
                                                                             For the years ended September 30
                                                             1997            1996         1995           1994            1993
- ----------------------------------------------------------------------------------------------------------------------------------
                                                          (in thousands except share and per share data and selected other data)
<S>                                                      <C>             <C>           <C>           <C>             <C>
Operations data:
     Net premiums written                                 $  639,744     $    602,707  $   424,756   $    385,926    $    340,355
==================================================================================================================================
     Net premiums earned                                     644,838          587,245      428,661        391,117         319,578
     Net investment income                                   237,823          206,524      181,375        142,677         119,978
     Net realized gains on investments                       127,982           55,229       50,765          3,717          98,371
     Losses and loss expenses (1)                            435,941          464,824      350,653        520,556         262,117
     Acquisition costs and administrative expenses           113,348           94,441       72,582         62,633          52,263
- ----------------------------------------------------------------------------------------------------------------------------------
     Net income (loss) (1)                               $   461,354     $    289,733  $   237,566   $    (45,678)   $    223,547
==================================================================================================================================
     Earnings (loss) per share (2)                       $      8.02     $       5.82  $      5.05   $      (0.95)   $       5.50
==================================================================================================================================
     Weighted average shares outstanding                  57,493,671       49,813,628   47,059,006     48,202,545      40,641,263
     Pro forma (3):
          Earnings per share                                                                                         $       4.49
                                                                                                                       ===========
          Weighted average shares outstanding                                                                        $ 49,831,087
     Cash dividends per share (4)                        $      0.80     $       0.64  $      0.50   $       0.42    $       0.43

Balance sheet data (at end of period]:
     Total investments and cash                          $ 4,474,765     $  4,170,071  $ 3,132,200   $  2,538,321    $  2,211,230
     Total assets                                          5,001,546        4,574,358    3,236,906      2,632,361       2,293,587
     Unpaid losses and loss expenses (1)                   1,869,995        1,836,113    1,437,930      1,160,392         650,180
     Total shareholders' equity (1)                        2,619,194        2,244,278    1,442,663      1,088,745       1,368,180
     Book value per share (1)                            $     47.37     $      38.58  $     31.29   $      22.96    $      27.47
     Fully diluted book value per share (1)              $     47.14     $      38.31  $     31.19   $      22.95    $      27.46

Selected other data:
     Loss and loss expense ratio (1)                           67.6%             79.1%        81.8%         133.1%           82.0%
     Underwriting and administrative expense ratio             17.6%             16.1%        16.9%          16.0%           16.4%
     Combined ratio (1)                                        85.2%             95.2%        98.7%         149.1%           98.4%
     Loss reserves to capital and surplus ratio (1)            71.4%             81.8%        99.7%         106.6%           47.5%
     Ratio of net premiums written to
       capital and surplus                                    0.24:1            0.27:1       0.29:1         0.35:1          0.25:1
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>


1.  At June 30, 1994 the Company increased its then existing reserves relating
    to breast implant claims. Although the reserve increase was partially
    satisfied by an allocation from existing IBNR, it also required an increase
    in the Company's total reserve for unpaid losses and loss expenses at June
    30, 1994 of $200 million (see "Management's Discussion and Analysis - Breast
    Implant Litigation").
2.  Earnings (loss) per share are computed using net income (loss) divided by
    the weighted average number of Ordinary Shares outstanding and, if dilutive,
    shares issuable under outstanding options. There is no material difference
    between primary and fully diluted earnings (loss) per share.
3.  Pro forma earnings per share have been calculated by dividing net income by
    the weighted average number of Ordinary Shares and Ordinary Share
    equivalents outstanding as adjusted to reflect the recapitalization and the
    repurchase of Ordinary Shares, effected in March 1933, and assumes the
    recapitalization and repurchase of Ordinary Shares occurred at the beginning
    of each year for which pro forma information is provided.
4.  The dividends declared in 1993 included a special "RPII" dividend of $0.23 
    per Ordinary Share paid to shareholders of record on July 7, 1993.






<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ---------------------------------------
                 RESULTS OF OPERATIONS AND FINANCIAL CONDITION
                 ---------------------------------------------



The following is a discussion of the Company's financial condition, results of
operations, liquidity and capital resources.  This discussion should be read in
conjunction with the consolidated financial statements, and related notes
thereto, presented on pages 32 to 53 of this annual report.

General
 
ACE Limited ("ACE") is a holding company which, through its Bermuda-based
operating subsidiaries, A.C.E. Insurance Company, Ltd. ("ACE Insurance"),
Corporate Officers & Directors Assurance Ltd. ("CODA") and Tempest Reinsurance
Company Limited ("Tempest"), provides insurance and reinsurance for a diverse
group of international clients.  In addition, the Company provides funds at
Lloyd's to support underwriting by Lloyd's syndicates managed by Methuen
Underwriting Limited ("MUL"), ACE London Aviation Limited ("ALA") and ACE London
Underwriting Limited ("ALU"), its indirect wholly owned subsidiaries.  The term
"the Company" refers to ACE and its subsidiaries excluding MUL, ALA and ALU.

On March 27, 1996, the Company acquired a controlling interest in Methuen
Group Limited ("Methuen"), the holding company for MUL.  On November 26, 1996,
the Company acquired the remaining 49 percent interest in Methuen.  Also on
November 26, 1996, the Company acquired Ockham Worldwide Holdings plc which
subsequently changed its name to ACE London Holdings Ltd. ("ACE London").  ACE
London owns two Lloyd's managing agencies, ALA and ALU.  For the 1996, 1997 and
1998 years of account, the Company, through corporate subsidiaries, has or will
participate in the underwriting of these syndicates by providing funds at
Lloyd's, primarily in the form of a letter of credit, supporting approximately
$37 million, $229 million and $485 million, respectively, of underwriting
capacity.  The syndicates managed by these agencies in which the Company
participates underwrite aviation, marine and non-marine risks.  Underwriting
capacity is the amount of gross premiums that a syndicate at Lloyd's can
underwrite in a given year of account.  However, a syndicate is not required to
fully utilize all of the capacity and it is not unusual for capacity utilization
to be significantly lower than 100 percent.

In March 1997, the Company, together with two other insurance companies,
formed a managing general agency in Bermuda to provide underwriting services to
the three organizations for political risk insurance coverage.  The new company,
Sovereign Risk Insurance Ltd. ("Sovereign") issues subscription policies with
the Company assuming 50 percent of each risk underwritten.  The Company
currently cedes 10 percent of all risks assumed from Sovereign.  Sovereign
offers limits of up to $50 million per project and $100 million per country.

In April 1997, the Company announced that it had signed a quota share treaty
reinsurance agreement with the Multilateral Investment Guarantee Agency
("MIGA"), part of the World Bank Group. MIGA provides coverage for foreign
investments in developing countries.  The agreement allows MIGA to provide
private investors and developing countries additional capacity to support
developmentally sound investment projects.  The coverages offered will be the
same as those offered by MIGA's guarantee program, namely, transfer restriction,
expropriation, war and civil disturbance and breach of contract.  The quota
share treaty offers limits of up to $25 million per contract with an aggregate
of $100 million per country.

On September 18, 1997, the Company announced it had executed a definitive
agreement for the acquisition, through a newly-created U.S. holding company, of
Westchester Specialty Group, Inc. ("WSG"), an indirect wholly owned subsidiary
of Xerox Corporation.  WSG, through its insurance subsidiaries, provides
specialty commercial property and umbrella liability coverages in the U.S.
Under the terms of the agreement, the Company will purchase all of the
outstanding capital stock of WSG for aggregate cash consideration of
approximately $333 million.  In connection with the acquisition, National
Indemnity, a subsidiary of Berkshire Hathaway, will provide $750 million (75
percent quota share of $1 billion) of reinsurance protection to WSG with respect
to their loss reserves for the 1996 and prior accident years.  The acquisition,
which is subject to, among other matters, regulatory approval and other
customary closing conditions, is expected to close in early 1998.  The Company
expects to finance this transaction with $250 million of bank debt and the
remainder with available cash (see "Liquidity and Capital Resources").
<PAGE>



 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



On September 30, 1997, the Company announced the incorporation of ACE Insurance
Company Europe Limited ("AICE"), as part of the International Financial Services
Centre in Dublin, Ireland. AICE has been granted a license to write all 18
classes of non-life insurance in all member states of the European Union.

The Company will continue to evaluate potential new product lines and other
opportunities in the insurance and reinsurance markets.

Results of Operations - Years ended September 30, 1997, 1996 and 1995

Net Income

 
<TABLE>
<CAPTION>
                                               1997        1996        1995
                                             --------------------------------
                                                      (in millions) 
<S>                                         <C>         <C>         <C>
Income excluding net realized
 gains on investments                        $ 333.4     $ 234.5     $ 186.8
Net realized gains on investments              128.0        55.2        50.8
                                             --------------------------------
Net income                                   $ 461.4     $ 289.7     $ 237.6
                                             ================================
</TABLE>


During the years ended September 30, 1997 and 1996, the Company has experienced
strong growth in income from insurance operations and net investment income. The
increase was partially offset by an increase in general and administrative
expenses. In fiscal 1997, Tempest contributed $119.8 million to income excluding
net realized gains on investments compared to $23.8 million for 1996. A full
year of operations for Tempest is included in the results for fiscal 1997 versus
one quarter of operations in 1996 as Tempest was purchased on July 1, 1996. For
1996, strong growth in income from insurance operations and net investment
income resulted in income excluding net realized gains on investments of $234.5
million compared to $186.8 million in 1995.
                                 
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ---------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------

<TABLE>
<CAPTION>

 Premiums
                                                                                Percentage           Percentage
                                                                        1997      Change      1996     Change         1995
                                                                       ----------------------------------------------------
                                                                                           (in millions)
<S>                                                                   <C>        <C>          <C>      <C>         <C>
Gross premiums written
ACE Insurance (including CODA)
  Excess liability                                                     $144.6       (31.2)%  $210.2      (14.9)%     $246.9
  Financial lines                                                       134.7        12.1     120.2        N.M.         9.2
  Satellite                                                             111.2         7.0     104.0        N.M.        44.9
  Directors and officers liability                                       85.4       (12.4)     97.6       (7.3)       105.0
  Aviation                                                               35.5         6.6      33.3        N.M.         8.9
  Excess property                                                        25.4        53.4      16.5        N.M.         5.6
  Other                                                                   7.4       (50.1)     14.8       (2.6)        15.3
Lloyd's syndicates                                                       78.8         N.M.     14.4        N.M.           -
Property catastrophe (Tempest)                                          119.6         N.M.     34.8        N.M.           -
                                                                       ----------------------------------------------------
                                                                       $742.6        15.0%   $645.8       48.2%      $435.8
                                                                       ====================================================

Net premiums written
ACE Insurance (including CODA)
  Excess liability                                                     $139.6       (31.0)%  $202.3      (15.4)%     $239.1
  Financial lines                                                       117.2        (1.7)    119.2        N.M.         9.2
  Satellite                                                              68.1       (20.1)     85.3       89.7         45.0
  Directors and officers liability                                       85.4       (12.4)     97.6       (7.1)       105.0
  Aviation                                                               27.0        (0.4)     27.1        N.M.         7.0
  Excess property                                                        24.2        74.0      13.9        N.M.         5.3
  Other                                                                   7.1       (45.1)     12.8       (9.4)        14.2
Lloyd's syndicates                                                       55.8         N.M.      9.7        N.M.           -
Property catastrophe (Tempest)                                          115.3         N.M.     34.8        N.M.           -
                                                                       ----------------------------------------------------
                                                                       $639.7         6.2%   $602.7       41.9%      $424.8
                                                                       ====================================================

Net premiums earned
ACE Insurance (including CODA)
  Excess liability                                                     $183.0       (23.2)%  $238.2       (9.2)%     $262.4
  Financial lines                                                        99.3        16.9      84.9        N.M.         0.8
  Satellite                                                              66.8       (14.1)     77.8       79.7         43.3
  Directors and officers liability                                       85.3       (18.4)    104.5       (5.0)       110.1
  Aviation                                                               26.5        39.5      19.0        N.M.         1.5
  Excess property                                                        21.5        81.7      11.8        N.M.         1.0
  Other                                                                  11.0       (12.6)     12.5       30.6          9.6
Lloyd's syndicates                                                       27.5         N.M.      2.8        N.M.           -
Property catastrophe (Tempest)                                          123.9         N.M.     35.7        N.M.           -
                                                                       ----------------------------------------------------
                                                                       $644.8         9.8%   $587.2       37.0%      $428.7
                                                                       ====================================================
</TABLE>
N.M. = Not Meaningful
<PAGE>



 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



The Company's ability to make strategic acquisitions, develop new and existing
product lines and maintain a high level of policy renewals on existing business
despite continuing competitive pressure in certain markets, particularly the
excess liability and directors and officers liability markets, has resulted in
increases in gross and net premiums written and net premiums earned for the
years ended September 30, 1997 and 1996.

Gross premiums written increased by $96.8 million to $742.6 million in 1997 from
$645.8 million in 1996 despite continuing competitive pressures in most
insurance markets.  The growth in gross premiums written is primarily
attributable to the inclusion of a full year of premiums for Tempest and the
increased participation in the Lloyd's syndicates managed by the Company.  As
Tempest was purchased on July 1, 1996, the 1996 comparatives only include three
months of Tempest premiums.  Tempest's gross written premiums for 1997 are down
by approximately 17 percent compared to their full year 1996 premiums primarily
due to rate reductions, increasing attachment points and some cancellations due
to pricing.  The Company's portion of gross premiums written by the Lloyd's
syndicates in which the Company participates amounted to $78.8 million in 1997
compared to $14.4 million in 1996 primarily as a result of the Company's
increased participation in these syndicates.  Satellite, aviation, excess
property and financial lines also contributed to the increase.  These increases
in gross premiums written were offset by declines in excess liability and
directors and officers liability gross premiums written.  The decline in excess
liability premiums of $65.6 million is mainly the result of continuing
competitive pressures in that market which have adversely affected the pricing
of the excess liability business but have also led to a reduction in the
Company's exposure and an improved risk profile as a result of higher average
attachment points and lower average limits.  Directors and officers liability
premiums declined by $12.2 million as this line faces an extremely competitive
environment with its corresponding pressures on prices.

In 1996, gross premiums written increased by $210.0 million or 48.2 percent
compared to 1995.  This growth was a result of a very strong year for the
Company's financial lines and satellite product lines together with the
increased contributions from aviation and excess property insurance which both
included a full year of underwriting in 1996.  Gross premiums written in 1996
also included property catastrophe premiums written by Tempest from July 1,
1996, as well as premiums from the Company's participation in the Lloyd's
syndicates managed by the Company.  These increases were offset by decreases in
excess liability and directors and officers liability premiums written in 1996
as a result of competitive pressures in these markets.

Net premiums written increased by $37.0 million in 1997 to $639.7 million
compared to $602.7 million for 1996.  The inclusion of a full year of net
premiums written for Tempest, our increased participation in the Lloyd's
syndicates managed by the Company and growth in excess property premiums
contributed to the increase in net premiums written.  These increases were
partially offset by declines in excess liability and directors and officers
liability premiums as discussed above.  A portion of the decline in net premiums
written is also the result of the Company's use of reinsurance for the satellite
and financial lines product lines in 1997.  Net premiums written for Tempest
were also reduced as a result of the purchase of a modest amount of
retrocessional cover during the current fiscal year.  In 1996, net premiums
written increased by $177.9 million or 41.9 percent compared to 1995 as a result
of a very strong year for the Company's financial lines and satellite product
lines together with other factors discussed above in the analysis of gross
premiums written.

For 1997, net premiums earned increased by $57.6 million to $644.8 million from
$587.2 million in 1996.  The growth in net premiums earned was primarily the
result of the inclusion of a full year of premiums earned for Tempest in 1997
compared to three months in 1996 and the Company's increased participation in
the Lloyd's syndicates managed by the Company.  Aviation, excess property and
financial lines also experienced growth during the year.  These increases were
offset by declines in excess liability, directors and officers liability and
satellite premiums earned.  For 1996, net premiums earned increased by $158.5
million to $587.2 million compared with $428.7 million in 1995.  The increase
was the result of contributions from the new lines of business, particularly
financial lines, together with the increase in satellite premiums earned
primarily from launch insurance, and the inclusion of Tempest earned premiums
since July 1, 1996, the date of acquisition, which amounted to $35.7 million.
These increases were offset by a decline in excess liability and directors and
officers liability premiums earned in the year.           
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------


<TABLE>
<CAPTION>
Net Investment Income
                                       Percentage           Percentage
                                1997     Change      1996     Change      1995
                               ------------------------------------------------
                                                (in millions)
<S>                           <C>        <C>       <C>        <C>       <C>
Net investment income          $237.8     15.2%     $206.5     13.9%     $181.4
                               =================================================
</TABLE>

The average yield earned on the investment portfolio in 1997 was down slightly
compared to the yield generated in 1996.  This is largely due to the fact that
during the first quarter of fiscal 1997 the Company increased the equity
exposure of the externally managed investment portfolio to 20 percent from 15
percent.  The remainder of the portfolio is comprised of fixed maturity
securities.  On average, the portfolio generated a lower yield in 1996 compared
to 1995 as a result of general market conditions.  Despite the decreases in
yield, net investment income increased by $31.3 million in 1997 compared to 1996
and by $25.1 million in 1996 compared to 1995, primarily as a result of a larger
investable asset base.  The increase in the investable asset base in 1997 and
1996 were due to positive cash flows from insurance operations,  the
reinvestment of funds generated by the portfolio and the fact that the
consolidated investment portfolio included the Tempest portfolio for the entire
period of fiscal 1997 and for three months during fiscal 1996.

Net Realized Gains (Losses) on Investments

<TABLE>
<CAPTION>
                                                     1997         1996        1995
                                                    --------------------------------
                                                            (in millions)
<S>                                                 <C>          <C>          <C>
Fixed maturities and short-term investments          $ 59.0       $14.4        $ 8.4
Equity securities                                      38.1        15.8          3.6
Financial futures and option contracts                 57.1        26.7         39.8
Currency                                              (26.2)       (1.7)        (1.0)
                                                    --------------------------------
                                                     $128.0       $55.2        $50.8
                                                    ================================
</TABLE>


The Company's investment strategy takes a long-term view and the portfolio is
actively managed to maximize total return within certain specific guidelines
which minimize risk.  The portfolio is reported at fair value.  The effect of
market movements on the investment portfolio will directly impact net realized
gains (losses) on investments when securities are sold.  Changes in unrealized
gains and losses, which result from the revaluation of securities held, are
reported as a separate component of shareholders' equity.

The Company uses foreign currency forward and option contracts to minimize the
effect of fluctuating foreign currencies on the value of non-U.S. dollar
holdings.  The contracts used are not designated as specific hedges and
therefore, realized and unrealized gains and losses recognized on these
contracts are recorded as a component of net realized gains (losses) on
investments in the period in which the fluctuations occur, together with net
foreign currency gains and losses recognized when non-U.S. dollar securities are
sold.
 
Sales proceeds for fixed maturity securities were generally higher than their
amortized costs during 1997 and 1996 which resulted in net realized gains on
sale of fixed maturities and short-term investments of $59.0 million in 1997
compared to gains of $14.4 million during 1996 and $8.4 million in 1995.

With strong equity markets and the increased equity exposure as discussed
above, net realized gains on sales of equity securities were $38.1 million in
1997 compared to $15.8 million in 1996.  There were gains of $3.6 million in
1995.               
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                   ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



The realized gains on financial futures and options contracts were generated
from U.S. Treasury futures contracts and from the equity index futures contracts
held in the synthetic equity fund. Gains and losses on these instruments are
closely linked to fluctuations in the U.S. Treasury and equity markets and
therefore, realized gains would be expected during periods of broad market
improvements while losses are realized during periods of market declines. Net
realized gains on financial futures and option contracts of $57.1 million
recorded in 1997 were primarily generated by the equity index futures contracts
held, as a result of the rise in the S&P 500 Stock Index of nearly 40 percent
during the fiscal year. The realized gains of $26.7 million in 1996 were
generated from U.S. Treasury futures contracts and from the equity index futures
contracts held in the synthetic equity fund as a result of broad market
improvements during the year. The $39.8 million generated in 1995 arose from
gains in the S&P 500 stock index and gains recognized on futures contracts used
by certain of the Company's external managers of fixed income securities.

Currency losses for the year were $26.2 million compared to a loss of $1.7
million for 1996. During 1997 the Company increased its exposure to non-U.S.
dollar securities from 8 percent of its externally managed investment portfolio
to 12 percent. Currency markets generally suffered declines against the U.S.
dollar during the year. At September 30, 1997 there were unrealized currency
losses of $20.0 million on securities held in the portfolio compared to $7.2
million as at September 30, 1996. Unrealized currency losses are reflected in
net unrealized appreciation on investments in shareholders' equity. At September
30, 1995 there was an unrealized currency gain of $1.7 million in net unrealized
appreciation on investments in shareholders' equity.

The Company's externally managed investment portfolio contains certain market
sensitive instruments which may be adversely effected by changes in interest
rates and foreign currency exchange rates (for further discussion see "Market
Sensitive Instruments and Risk Management").

Combined Ratio

<TABLE>
<CAPTION>

                                                              1997         1996         1995
                                                          --------------------------------------

<S>                                                       <C>              <C>          <C>
Loss and loss expense ratio                                  67.6%         79.1%        81.8%
Underwriting and administrative expense ratio                17.6          16.1         16.9
                                                          --------------------------------------
Combined ratio                                               85.2%         95.2%        98.7%
                                                          ======================================
</TABLE>


The underwriting results of a property and casualty insurer are discussed
frequently by reference to its loss and loss expense ratio, underwriting and
administrative expense ratio and combined ratio. Each ratio is derived by
dividing the relevant expense amounts by net premiums earned. The combined ratio
is the sum of the loss and loss expense ratio, and the underwriting and
administrative expense ratio. A combined ratio under 100 percent indicates
underwriting profits and a combined ratio exceeding 100 percent indicates
underwriting losses.

Losses and Loss Expenses

<TABLE>
<CAPTION>
                                                         Percentage           Percentage
                                                  1997     Change      1996     Change      1995
                                                --------------------------------------------------
                                                                   (in millions)

<S>                                              <C>     <C>          <C>     <C>          <C>
Losses and loss expenses                         $435.9    (6.2)%     $464.8     32.6%     $350.6
                                                ==================================================
</TABLE>
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                   ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



For the years ended September 30, 1997 and 1996, the loss and loss expense
ratios were 67.6 percent and 79.1 percent. These ratios have been favorably
impacted by the results of Tempest. Property catastrophe loss experience is
generally characterized as low frequency but high severity short-tail claims
which may result in significant volatility in results. For the year ended
September 30, 1997 and the three month period from July 1, 1996, the date of
acquisition to September 30, 1996, the loss and loss expense ratio for Tempest
was 8.8 percent and 36.4 percent, respectively. These favorable loss ratios are
the result of low loss activity in Tempest since July 1, 1996. Excluding
Tempest, the loss and loss expense ratios would have been 80.9 percent for 1997
and 81.8 percent for 1996. The loss and loss expense ratio for 1995 was 81.8
percent.

Several aspects of the Company's operations, including the low frequency and
high severity of losses in the high excess layers in certain lines of business
in which the Company provides insurance and reinsurance, complicate the
actuarial reserving techniques utilized by the Company. Management believes,
however, that the Company's reserve for unpaid losses and loss expenses,
including those arising from breast implant litigation, are adequate to cover
the ultimate cost of losses and loss expenses incurred through September 30,
1997. Since such provisions are necessarily based on estimates, future
developments may result in ultimate losses and loss expenses significantly
greater or less than such amounts (see "Breast Implant Litigation").

Underwriting and Administrative Expenses
<TABLE>
<CAPTION>
                                                                        Percentage                 Percentage
                                                               1997       Change         1996        Change       1995
                                                          ------------------------------------------------------------------
                                                                                     (in millions)

<S>                                                         <C>         <C>             <C>         <C>           <C>
Underwriting and administrative expenses                     $113.4       20.0%         $94.4         30.0%       $72.6
                                                          =========================================================================-
</TABLE>



The underwriting and administrative expense ratio has increased to 17.6 percent
in 1997 compared to 16.1 percent in 1996, an increase of $19.0 million. This
increase is due to an increase in administrative expenses of $24.9 million in
1997 over 1996, which is partially offset by a decrease in acquisition costs.
The increase in administrative expenses is primarily due to the increased cost
base resulting from the strategic diversification by the Company over the past
two years, including the recent acquisition of Tempest, Methuen and ACE London
as well as the development of the newer insurance lines and products. Of the
$24.9 million increase in administrative expenses in 1997, $12.7 million relates
directly to Tempest and the Company's Lloyd's operations, compared to $3.1
million in 1996. Of these amounts, $5.1 million and $1.3 million for 1997 and
1996 respectively, relate to the amortization of goodwill resulting from the
acquisition of Tempest. The decrease in acquisition costs in 1997 to $47.0
million from $53.0 million in 1996 is due primarily to the continuing change in
the mix of business written by the Company.

Underwriting and administrative expenses increased by $21.8 million in 1996
compared to 1995 but the underwriting and administrative expense ratio actually
decreased to 16.1 percent from 16.9 percent in 1995. The increase in expenses is
a result of increases of $6.4 million of acquisition costs and $15.6 million of
administrative expenses. Acquisition costs increased as a result of the
significant increase in net premiums earned in 1996 versus 1995. However, the
acquisition cost ratio decreased to 9.0 percent from 10.9 percent primarily due
to the change in the mix of premiums earned in the year. As with 1997,
administrative expenses increased primarily due to the increased cost base
resulting from the strategic diversification by the Company over the past two
years, including the acquisition of Tempest and Methuen in 1996 as well as the
development of the new insurance lines and products. In addition, the Company
recorded expenses related to stock appreciation rights of $6.0 million in 1996
compared to $2.5 million in 1995. All stock appreciation rights were either
exercised or forfeited during 1997.
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                   ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



LIQUIDITY AND CAPITAL RESOURCES

As a holding company, ACE's assets consist primarily of the stock of its
subsidiaries as well as other investments. In addition to investment income, its
cash flows depend primarily on dividends or other statutorily permissible
payments from its Bermuda-based insurance and reinsurance subsidiaries (the
"Bermuda subsidiaries"). There are currently no legal restrictions on the
payment of dividends from retained earnings by the Bermuda subsidiaries as the
minimum statutory capital and surplus requirements are satisfied by the share
capital and additional paid-in capital of each of the Bermuda subsidiaries.
However, the payment of dividends or other statutorily permissible distributions
by the Bermuda subsidiaries is subject to the need to maintain shareholder's
equity at a level adequate to support the level of insurance and reinsurance
operations. On December 20, 1996, ACE received a dividend of $10 million from
ACE Insurance Management Limited and on May 30, 1997, ACE received a dividend of
$180 million from ACE Insurance.

The Company's consolidated sources of funds consist primarily of net premiums
written, investment income, and the proceeds from sales and maturities of
investments. Funds are used primarily to pay claims, operating expenses and
dividends, for the purchase of investments and for share repurchases.

For the years ended September 30, 1997, 1996 and 1995, the Company's
consolidated net cash flows from operating activities were $282.1 million,
$624.0 million and $437.0 million respectively. Cash flows are affected by claim
payments, which due to the nature of the Company's operations, may comprise
large loss payments on a limited number of claims and therefore can fluctuate
significantly from year to year. The irregular timing of these loss payments,
for which the source of cash can be from operations, available net credit
facilities or routine sales of investments, can create significant variations in
cash flows from operations between periods. Total loss and loss expense payments
amounted to $402.1 million, $101.4 million and $73.1 million in fiscal 1997,
1996 and 1995, respectively.

At September 30, 1997, total investments and cash amounted to $4.5 billion
compared with $4.2 billion at September 30, 1996. The increase is mainly
attributable to cash flows from operating activities, the reinvestment of funds
generated by the portfolio as well as market appreciation during the year. The
increase generated by these items was partially offset by share repurchases and
dividends paid during 1997.

The Company's consolidated investment portfolio is structured to provide a high
level of liquidity to meet insurance related or other obligations. During 1997,
an average of 9.4 percent of the externally managed investment portfolio was
held in short-term investments which mature in one year or less from date of
issue. Additionally, at September 30, 1997, 5.5 percent of the fixed maturity
portfolio had a maturity date within the succeeding twelve month period,
providing a further source of liquid funds. The consolidated investment
portfolio is externally managed by independent professional investment managers
and is invested in high quality investment grade marketable fixed income and
equity securities, the majority of which trade in active, liquid markets (see
note 4 of the Notes to Consolidated Financial Statements for a detailed analysis
of the portfolio). At September 30, 1997, 92.5 percent of the fixed maturity
portion of the portfolio was rated "A" or better by one or more nationally
recognized U.S. rating agencies. The Company believes that its cash balances,
cash flow from operations, routine sales of investments and the liquidity
provided under its committed line of credit (discussed below) are adequate to
allow the Company to pay claims within the time periods required under its
policies.
 
The Company has a $50 million committed unsecured line of credit provided by a
syndicate of banks, led by Morgan Guaranty Trust Company of New York ("Morgan").
In accordance with the Company's cash management strategy, this facility is
utilized when it is determined that borrowing on a short-term basis is
advantageous to the Company. Borrowings from this facility are generally repaid
from operating cash flows, primarily premium receipts. There were no drawdowns
on the facility during 1997 or 1996. The line of credit agreement requires the
Company to maintain consolidated tangible net worth of not less than $1.25
billion.
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



        The same syndicate of banks have also provided up to (Pounds)75 million
    (approximately $113 million) for a five year, secured letter of credit
    ("LOC"), which is primarily used to provide funds at Lloyd's to support
    underwriting capacity on Lloyd's syndicates in which the Company
    participates.

        Subsequent to September 30, 1997, the Company has put in place
    syndicated credit facilities which replace the existing facilities described
    in the preceding two paragraphs. J.P. Morgan Securities, Inc. and Mellon
    Bank N.A. acted as co-arrangers in the arranging, structuring and
    syndication of these credit facilities.  The new facilities provide:

              A $200 million 364 day revolving credit facility and a $200
    million five year revolving credit facility which together make up a
    combined $400 million committed, unsecured revolving credit facility.  This
    new five year revolving credit facility has a $50 million LOC sublimit.

              A five year LOC facility of approximately (Pounds)154 million
    (approximately $250 million).  This facility will primarily be used on 
    fulfill the requirements of Lloyd's to provide funds to support underwriting
    capacity on Lloyd's syndicates in which the Company participates. The
    minimum consolidated tangible net worth covenant for ACE Insurance under
    this LOC facility is $1.0 billion.

              A $250 million seven year Amortizing Term Loan Facility which will
    be used to partially finance the acquisition of WSG. The interest rate on
    the term loan is LIBOR plus an applicable spread.

        The revolving credit and term loan facilities require that the Company
    maintain a minimum consolidated tangible net worth of $1.4 billion.

        The Board of Directors has authorized the repurchase from time to time
    of the Company's Ordinary Shares in open market and private purchase
    transactions.  During 1997, the Company repurchased 3,031,000 Ordinary
    Shares under share repurchase programs for an aggregate cost of $182.6
    million.  On May 9, 1997, the Board of Directors terminated the then
    existing share repurchase program and authorized a new program for up to
    $300.0 million of the Company's Ordinary Shares.  As at September 30, 1997,
    approximately $268.0 million of the current Board authorization had not been
    utilized.  During the period October 1, 1997 through November 25, 1997 the
    Company repurchased an additional 786,200 Ordinary Shares under the Share
    Repurchase Program for an aggregate cost of $71.8 million, leaving
    approximately $196 million of the May 9, 1997 Board authorization not
    utilized.  During 1996, the Company repurchased 1,268,000 Ordinary Shares
    under share repurchase programs for an aggregate cost of $58.0 million.

        On October 18, 1996, January 17, 1997 and April 18, 1997, the Company
    paid quarterly dividends of 18 cents per share to shareholders of record on
    September 30, 1996, December 29, 1996 and March 31, 1997.  On July 18, 1997
    the Company paid a quarterly dividend of 22 cents per share to shareholders
    of record on June 30, 1997.  On August 8, 1997 the Board of Directors
    declared a quarterly dividend of 22 cents per share paid on October 17, 1997
    to shareholders of record on September 30, 1997.  On November 13, 1997, the
    Board of Directors declared a quarterly dividend of 24 cents per share
    payable on January 16, 1998, to shareholders of record on December 13, 1997.
    The declaration and payment  of  future  dividends  is  at the  discretion
    of the  Board of Directors and will be dependent upon the profits and
    financial requirements of the Company and other factors, including legal
    restrictions on the payment of dividends and such other factors as the Board
    of Directors deems relevant.

        Fully diluted net asset value per share was $47.14 at September  30,
    1997, compared with $38.31 at September 30, 1996.

 

<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



Changes in shareholders' equity for the years ended September 30, 1997 and 1996
were as follows:

<TABLE>
<CAPTION>
                                                                               1997                1996
                                                                            -----------------------------
                                                                                    (in millions)
<S>                                                                         <C>                 <C>
Balance, beginning of year                                                    $2,244              $1,443

Net income                                                                       461                 290
Change in net unrealized appreciation (depreciation) on investments              135                 (33)
Repurchase of Ordinary Shares                                                   (183)                (58)
Dividends declared                                                               (45)                (32)
Other                                                                              7                  --
Value of Ordinary Shares and options issued in Tempest acquisition                --                 634
                                                                         -------------------------------

Balance, end of year                                                          $2,619              $2,244
                                                                         ===============================
</TABLE>


The Company maintains loss reserves for the estimated unpaid ultimate liability
for losses and loss expenses under the terms of its policies and agreements. The
reserve for unpaid losses and loss expenses of $1.9 billion at September 30,
1997, includes $924.2 million of case and loss expense reserves. While the
Company believes that its reserve for unpaid losses and loss expenses at
September 30, 1997 is adequate, future developments may result in ultimate
losses and loss expenses significantly greater or less than the reserve
provided. A number of the Company's insureds have given notice of claims
relating to breast implants or components or raw material thereof that had been
produced and/or sold by such insureds. During fiscal 1997, the Company has made
certain payments to policyholders with respect to these claims. However, the
Company does not have adequate data upon which to anticipate the timing of
future payments relating to these liabilities, and it expects that the amount of
time required to determine the ultimate financial impact of the options selected
by claimants may extend well into 1998 and beyond (see "Breast Implant
Litigation").

The Company's financial condition, results of operations and cash flow are
influenced by both internal and external forces. Claims settlements, premium
levels and investment returns may be impacted by changing rates of inflation and
other economic conditions. In many cases, significant periods of time, ranging
up to several years or more, may elapse between the occurrence of an insured
loss, the reporting of the loss to the Company and the settlement of the
Company's liability for that loss. The liquidity of its investment portfolio,
cash flows and the line of credit are, in management's opinion, adequate to meet
the Company's expected cash requirements.


Breast Implant Litigation

A number of the Company's insureds have given notice of claims relating to
breast implants or components or raw material thereof that had been produced
and/or sold by such insureds. Lawsuits, including class actions, involving
thousands of implant recipients have been filed in both state and federal courts
throughout the United States. Most of the federal cases have been consolidated
pursuant to the rules for Multidistrict Litigation to a Federal District Court
in Alabama, although cases are in the process of being transferred back to
federal courts or remanded to state courts.

On May 15, 1995, the Dow Corning Corporation, one of the major defendants, filed
for protection under Chapter 11 of the U.S. Bankruptcy Code and claims against
Dow Corning remain stayed subject to the Bankruptcy Code.
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



On October 1, 1995, negotiators for three of the major defendants agreed on the
essential elements of an individual settlement plan for U.S. claimants with at
least one implant from any of those manufacturers ("the Settlement"). In
general, under the Settlement, the amounts payable to individual participants,
and the manufacturers' obligations to make those payments, would not be affected
by the number of participants electing to opt out from the new plan. Also, in
general, the compensation would be fixed and not affected by the number of
participants, and the manufacturers would not have a right to walk away because
of the amount of claims payable. Finally, each settling defendant agreed to be
responsible only for cases in which its implant was identified, and not for a
percentage of all cases. By November 13, 1995, the Settlement was approved by
the three major defendants. In addition, two other defendants became part of the
Settlement, although certain of their settlement terms are different and more
restricted than the plan offered by the original three defendants. On December
22, 1995, the multidistrict litigation judge approved the Settlement and the
materials for giving notice to claimants although an appeal concerning the
Settlement is pending with the Eleventh Circuit Court of Appeals.

Beginning in mid-January, 1996, the three major defendants have each made
payments to a court-established fund for use in making payments under the
Settlement. The Settlement Claims Office had reported that as of August 29,
1997, it has sent out Notification of Status Letters to 361,377 non-opt-out
domestic implant recipients who had registered with the Settlement Claims
Office. As of August 31, 1997, approximately $518 million had been distributed
under the Settlement to implant recipients of the three major defendants.
Certain potential payments to claimants relating to other implants remain
suspended because of the pending appeals. The Settlement Claims Office has also
reported that approximately 32,500 domestic registrants (out of the 361,377
domestic registrants sent Notification of Status Letters) exercised opt-out
rights after receiving their status letters. Previously, approximately 19,000
other domestic implant recipients had exercised opt-out rights in 1994 and/or
before receiving status letters.

Although the Company has underwritten the coverage for a number of the defendant
companies including four of the companies involved in the Settlement, the
Company anticipates that insurance coverage issued prior to the time the Company
issued policies will be available for a portion of the defendants' liability. In
addition, the Company's policies only apply when the underlying liability
insurance policies or per occurrence retentions are exhausted.

Declaratory judgment lawsuits, involving four of the Company's insureds, have
been filed seeking guidance on the appropriate trigger for their insurance
coverage. None of the insureds have named the Company in such lawsuits, although
other insurers and third parties have sought to involve the Company in those
lawsuits. To date, one court has stayed a lawsuit against the Company by other
insurers; two courts have dismissed actions by other insurers against the
Company. Another court in Texas has ruled against the Company's arguments that
the court should dismiss the claims by other insurers and certain doctors
attempting to bring the Company into coverage litigation there. On appeal in the
Texas lawsuit, the appellate court affirmed the lower court's order refusing to
dismiss the claims against the Company; further appellate review in the Texas
Supreme Court is pending. In addition, further efforts are contemplated to stay
or dismiss the doctor's claims against the Company in the Texas lawsuit.

At June 30, 1994, the Company increased its then existing reserves relating to
breast implant claims. Although the reserve increase was partially satisfied by
an allocation from existing IBNR, it also required an increase in the Company's
total reserve for unpaid losses and loss expenses at June 30, 1994 of $200
million. The increase in reserves was based on information made available in the
pending lawsuits and information from the Company's insureds and was predicated
upon an allocation between coverage provided before and after the end of 1985
(when the Company commenced underwriting operations). No additional reserves
relating to breast implant claims have been added since June 30, 1994.
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



 
The Company continually evaluates its reserves in light of developing
information and in light of discussions and negotiations with its insureds.
During 1997, the Company made payments of approximately $250 million with
respect to breast implant claims.  These payments were included in previous
reserves and are consistent with the Company's belief that its reserves are
adequate.  Significant uncertainties continue to exist with regard to the
ultimate outcome and cost of the Settlement and value of the opt-out claims.
While the Company is unable at this time to determine whether additional
reserves, which could have a material adverse effect upon the financial
condition, results of operations and cash flows of the Company, may be necessary
in the future, the Company believes that its reserves for unpaid losses and loss
expenses including those arising from breast implant claims are adequate as at
September 30, 1997.

Market Sensitive Instruments And Risk Management

In accordance with the Securities and Exchange Commission's Financial Reporting
Release No. 48, the following analysis presents hypothetical losses in cash
flows, earnings and fair values of derivative instruments and other market
sensitive instruments used in the Company's portfolio as at September 30, 1997.
The Company uses investment derivative instruments such as futures, options and
foreign currency forward and option contracts for duration management and
management of foreign currency exposures.  These instruments are sensitive to
changes in interest rates and foreign currency exchange rates.  The portfolio
includes other market sensitive instruments such as mortgage-backed securities
which are subject to prepayment risks and changes in market values, with changes
in interest rates.  These mortgage-backed security instruments are held for
purposes other than trading and are classified as available for sale in the
Company's balance sheet.  

Duration Management and Market Exposure Management

The Company uses financial futures and option contracts for the purpose of
managing certain investment portfolio exposures.  Futures contracts are not
recognized in the financial statements as assets or liabilities and any changes
in fair value of these instruments due to changes in market interest rates would
be recognized in the statement of operations as realized gains or losses in
accordance with the our accounting policy.  Option contracts are utilized in the
portfolio for the purposes of duration management, providing protection against
any unexpected shifts in interest rates.  At September 30, 1997, the fair value
of the option contracts held and written was $178,000 and $(222,000)
respectively, and the market value of mortgage-backed securities, another
category of market sensitive instruments, was $1,342 million, or approximately
31 percent of the total investment portfolio.  Mortgage-backed securities
include pass through mortgage bonds and collateralized mortgage obligations.

The aggregate hypothetical loss generated from an immediate adverse shift in
the treasury yield curve of 100 basis points would be a decrease in total return
of 4.5 percent which equates to a decrease in market value of approximately $167
million on a portfolio valued at $4.2 billion at September 30, 1997.  An
immediate time horizon was used as this presents the worse case scenario.

Foreign Currency Exposure Management

Foreign currency forward and option contracts are used in the portfolio to
minimize the effect of fluctuating currencies on the non-U.S. dollar portfolio.
The value of premiums paid for the contracts represents approximately 9 percent
of the non-U.S. dollar portfolio.  A hypothetical adverse change of the forward
exchange rate (a strengthening of the U.S. dollar) is assumed in order to
estimate the exposure risk.  Potential losses in cash flows represent additional
cash requirements to be paid out, to settle those foreign currency forward
positions in the portfolio as at September 30, 1997.  The hypothetical loss in
cash flows of the foreign currency contracts is estimated to be $1.4 million.
The loss was based on modeling assumptions using a two standard deviation move
in currency rates, and forward yield curves were determined using the implied
volatility, spot rates and forward rates of the contracts at September 30, 1997.
The foreign currency forward contracts are not considered hedges for financial
accounting purposes and have maturity dates of no more than six months.
<PAGE>
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    ----------------------------------------
           RESULTS OF OPERATIONS AND FINANCIAL CONDITION (continued)
           ---------------------------------------------------------



The hypothetical loss in cash flows from the foreign currency put options
assumes that the options were not exercised.  For long option positions, the
maximum loss is the premium paid for the options and at September 30, 1997 the
hypothetical loss is approximately $400,000.
 
New Accounting Pronouncements

In February 1997, the Financial Accounting Standard Board ("FASB") issued
Statement of Financial Accounting Standards No. 128 "Earnings per Share" ("FAS
128"), effective for financial statements issued for periods ending after
December 15, 1997.  This Statement establishes standards for computing and
presenting earnings per share ("EPS").  This Statement simplifies the standards
for computing EPS previously found in APB Opinion No. 15, Earnings per Share,
and makes them comparable to international EPS standards.  It replaces the
presentation of primary EPS with a presentation of basic EPS.  It also requires
dual presentation of basic and diluted EPS on the face of the income statement
for all entities with complex capital structures, which the Company is
considered to have, and requires a reconciliation of the numerator and
denominator of the basic EPS computation to the numerator and denominator of the
diluted EPS computation.  This Statement requires restatement of all prior-
period EPS data presented.  The Company anticipates presenting its EPS in
compliance with the dual presentation standards mandated by the Statement at
December 31, 1997.

The Company has calculated basic and diluted EPS, as defined in FAS 128 and
interpreted by the Company based on information currently available, and has
determined that such amounts do not differ materially from primary EPS, which is
reflected in the Company's statement of operations for the years presented.
<PAGE>

 
                          ACE LIMITED AND SUBSIDIARIES

                       CONSOLIDATED FINANCIAL STATEMENTS

                               SEPTEMBER 30, 1997
<PAGE>
 
              MANAGEMENT'S RESPONSIBILITY FOR FINANCIAL STATEMENTS



Management is responsible for the preparation, integrity and objectivity of the
consolidated financial statements and other financial information presented in
this annual report.  The accompanying consolidated financial statements were
prepared in accordance with generally accepted accounting principles, applying
certain estimates and judgments as required.

The Company's internal controls are designed to provide reasonable assurance as
to the integrity and reliability of the financial statements and to adequately
safeguard, verify and maintain accountability of assets.  Such controls are
based on established policies and procedures and are implemented by trained,
skilled personnel with an appropriate segregation of duties.  The Company's
internal audit department performs independent audits on the Company's internal
controls.  The Company's policies and procedures prescribe that the Company and
all its employees are to maintain the highest ethical standards and that its
business practices are to be conducted in a manner which is above reproach.

Coopers & Lybrand L.L.P., independent accountants, are retained to audit the
Company's financial statements.  Their accompanying report is based on audits
conducted in accordance with generally accepted auditing standards, which
includes the consideration of the Company's internal controls to establish a
basis for reliance thereon in determining the nature, timing and extent of audit
tests to be applied.

The Board of Directors exercises its responsibility for these financial
statements through its Audit Committee, which consists entirely of independent
non-management Board members.  The Audit Committee meets periodically with the
independent accountants, both privately and with management present, to review
accounting, auditing, internal controls and financial reporting matters.


/s/ Brian Duperreault                            /s/ Christopher Z. Marshall
- ------------------------------                   -------------------------------
Brian Duperreault                                Christopher Z. Marshall
Chairman, President and                          Chief Financial Officer
Chief Executive Officer
<PAGE>
 
                       REPORT OF INDEPENDENT ACCOUNTANTS



The Board of Directors and Shareholders of ACE Limited:


We have audited the consolidated balance sheets of ACE Limited and Subsidiaries
as of September 30, 1997 and 1996, and the related consolidated statements of
operations, shareholders' equity, and cash flows for each of the three years in
the period ended September 30, 1997.  These financial statements are the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these financial statements based on our audits.

We conducted our audits in accordance with  generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of ACE Limited and
Subsidiaries as of September 30, 1997 and 1996, and the consolidated results of
their operations and their cash flows for each of the three years in the period
ended September 30, 1997, in conformity with generally accepted accounting
principles.



New York, New York
November 5, 1997
<PAGE>

 
                         ACE LIMITED AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS

                          September 30, 1997 and 1996
<TABLE>
<CAPTION>
                                                                                    1997                1996
                                                                                 -----------         -----------
                                                                                 (in thousands of U.S. dollars,
                                                                                except share and per share data)
<S>                                                                             <C>                  <C>
Assets

Investments and cash
   Fixed maturities available for sale, at fair value
       (amortized cost - $3,226,511 and $3,394,437)........................      $3,290,336          $3,389,762
   Equity securities, at fair value (cost - $502,481 and $257,049).........         634,970             323,005
   Short-term investments, at fair value
       (amortized cost - $364,552 and $376,680)............................         364,432             376,680
   Other investments, at cost..............................................          78,691              27,250
   Cash....................................................................         106,336              53,374
                                                                                 ----------          ----------
    Total investments and cash.............................................       4,474,765           4,170,071

Goodwill on Tempest acquisition............................................         196,667             201,742
Premiums and insurance balances receivable.................................         135,815              85,033
Accrued investment income..................................................          40,581              42,728
Deferred acquisition costs.................................................          27,018              34,546
Prepaid reinsurance premiums...............................................          22,196              15,421
Other assets...............................................................         104,504              24,817
                                                                                 ----------          ----------
       Total assets........................................................      $5,001,546          $4,574,358
                                                                                 ==========          ==========
Liabilities

Unpaid losses and loss expenses............................................      $1,869,995          $1,836,113
Unearned premiums..........................................................         400,689             398,731
Premiums received in advance...............................................          36,218              29,852
Accounts payable and accrued liabilities...................................          63,014              54,913
Dividend payable...........................................................          12,436              10,471
                                                                                 ----------          ----------
       Total liabilities...................................................       2,382,352           2,330,080
                                                                                 ----------          ----------
Commitments and contingencies

Shareholders' equity

Ordinary Shares ($0.125 par value, 100,000,000 shares authorized;
   55,293,218 and 58,170,755 shares issued and outstanding)................           6,911               7,271
Additional paid-in capital.................................................       1,102,824           1,156,194
Unearned stock grant compensation..........................................          (1,993)             (1,299)
Net unrealized appreciation on investments.................................         196,194              61,281
Cumulative translation adjustments.........................................             855                 131
Retained earnings..........................................................       1,314,403           1,020,700
                                                                                 ----------          ----------
       Total shareholders' equity..........................................       2,619,194           2,244,278
                                                                                 ----------          ----------
       Total liabilities and shareholders' equity..........................      $5,001,546          $4,574,358
                                                                                 ==========          ==========
 
</TABLE>

          See accompanying notes to consolidated financial statements
<PAGE>
 

                         ACE LIMITED AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF OPERATIONS

             For the Years Ended September 30, 1997, 1996 and 1995

<TABLE>
<CAPTION>
                                           1997         1996        1995
                                        -----------  ----------  ----------
                                           (in thousands of U.S. dollars, 
                                          except share and per share data)
<S>                                     <C>         <C>         <C>     
Revenues
   Gross premiums written.............  $  742,654  $  645,800  $  435,820
   Reinsurance premiums ceded.........    (102,910)    (43,093)    (11,064)
                                        ----------  ----------  ----------
 
   Net premiums written...............     639,744     602,707     424,756
   Change in unearned premiums........       5,094     (15,462)      3,905
                                        ----------  ----------  ----------
 
   Net premiums earned................     644,838     587,245     428,661
   Net investment income..............     237,823     206,524     181,375
   Net realized gains on investments..     127,982      55,229      50,765
                                        ----------  ----------  ----------
 
       Total revenues.................   1,010,643     848,998     660,801
                                        ----------  ----------  ---------- 
Expenses
   Losses and loss expenses...........     435,941     464,824     350,653
   Acquisition costs..................      46,957      52,954      46,647
   Administrative expenses............      66,391      41,487      25,935
                                        ----------  ----------  ----------
 
       Total expenses.................     549,289     559,265     423,235
                                        ----------  ----------  ----------
 
Net income............................  $  461,354  $  289,733  $  237,566
                                        ==========  ==========  ==========
 
Earnings per share....................  $     8.02  $     5.82  $     5.05
                                        ==========  ==========  ==========

Weighted average shares outstanding...  57,493,671  49,813,628  47,059,006
                                        ==========  ==========  ==========
</TABLE> 

          See accompanying notes to consolidated financial statements
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

             For the Years Ended September 30, 1997, 1996 and 1995
<TABLE>
<CAPTION>
 
                                                                                            1997            1996            1995 
                                                                                            ----            ----            ---- 
                                                                                               (in thousands of U.S. dollars)      
<S>                                                                                     <C>             <C>            <C>       

Ordinary Shares
     Balance - beginning of year ....................................................   $    7,271      $    5,764     $    5,928
     Shares issued in Tempest transaction............................................         --             1,666           --
     Issued under Employee Stock Purchase Plan (ESPP)................................            1                           --
     Issued under Stock Appreciation Right (SAR) Plan................................            8                           --
     Exercise of stock options.......................................................            9            --                3
     Repurchase of shares............................................................         (378)           (159)          (167)
                                                                                        ----------      ----------       --------

          Balance - end of year......................................................        6,911           7,271          5,764
                                                                                        ----------      ----------       --------

Additional paid-in capital
     Balance - beginning of year.....................................................    1,156,194         548,513        564,198
     Shares issued in Tempest acquisition............................................         --           620,552           --
     Options issued in Tempest acquisition...........................................         --            12,124           --
     Exercise of stock options.......................................................        2,182              27            165
     Cancellation of restricted stock awards.........................................          (87)           --             --
     Issued under ESPP...............................................................          228            --             --
     Issued under SAR Plan...........................................................        3,919            --             --
     Repurchase of Ordinary Shares...................................................      (59,612)        (25,022)       (15,850)
                                                                                        ----------      ----------       --------

          Balance - end of year......................................................    1,102,824       1,156,194        548,513
                                                                                        ----------      ----------       --------
Unearned stock grant compensation
       Balance - beginning of year...................................................       (1,299)         (1,796)          (412)
       Stock grants awarded..........................................................       (3,244)           (708)        (2,413)
       Stock grants forfeited........................................................           79              60             --
       Amortization..................................................................        2,471           1,145          1,029
                                                                                        ----------      ----------       --------

          Balance - end of year......................................................       (1,993)         (1,299)        (1,796)
                                                                                        ----------      ----------       --------

Net unrealized appreciation (depreciation) on investments
     Balance - beginning of year.....................................................       61,281          94,694        (79,685)
     Net appreciation (depreciation) during year.....................................      134,913         (33,413)       174,379
                                                                                        ----------      ----------       --------

          Balance - end of year......................................................      196,194          61,281         94,694
                                                                                        ----------      ----------       --------

Cumulative translation adjustments
     Balance - beginning of year.....................................................          131            --            --
     Net adjustment for year.........................................................          724             131          --
                                                                                        ----------      ----------       --------

       Balance - end of year.........................................................          855             131          --
                                                                                        ----------      ----------       --------
Retained earnings
     Balance - beginning of year.....................................................    1,020,700         795,488        598,716
     Net income......................................................................      461,354         289,733        237,566
     Dividends declared..............................................................      (44,993)        (31,699)       (23,297)
     Repurchase of Ordinary Shares...................................................     (122,658)        (32,822)       (17,497)
                                                                                        ----------      ----------     ----------
          Balance - end of year......................................................    1,314,403       1,020,700        795,488
                                                                                        ----------      ----------     ----------
               Total shareholders' equity............................................   $2,619,194      $2,244,278     $1,442,663
                                                                                        ==========      ==========     ==========
</TABLE>  
          See accompanying notes to consolidated financial statements
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS

             For The Years Ended September 30, 1997, 1996 and 1995
<TABLE>
<CAPTION>

                                                                                 1997           1996          1995
                                                                            --------------  ------------  ------------
                                                                                 (in thousands of U.S. dollars)

<S>                                                                            <C>           <C>           <C> 
Cash flows from operating activities
   Net income.............................................................     $   461,354   $   289,733   $   237,566
   Adjustments to reconcile net income to net cash provided
     by operating activities:
        Unearned premiums.................................................           1,958        14,247        (1,771)
        Unpaid losses and loss expenses...................................          33,882       363,448       277,538
        Deferred acquisition costs........................................           7,528         9,262         3,016
        Premiums and insurance balances receivable........................         (50,782)        3,460       (11,948)
        Premiums received in advance......................................           6,336         5,976         4,230
        Prepaid reinsurance premiums......................................          (6,775)      (11,267)       (2,134)
        Net realized gains on investments.................................        (127,982)      (55,229)      (50,765)
        Amortization of premium/discount..................................          (6,104)       (7,847)      (12,590)
        Accounts payable and accrued liabilities..........................         (23,327)       11,308         1,029
        Change in cumulative translation adjustments......................            (724)         (131)           --
        Other.............................................................         (13,271)        1,076        (7,148)
                                                                               -----------   -----------   -----------

          Net cash flows from operating activities........................         282,123       624,036       437,023
                                                                               -----------   -----------   -----------

Cash flows from investing activities
        Purchases of fixed maturities.....................................      (6,415,568)   (8,781,390)   (7,562,469)
        Purchases of equity securities....................................        (603,598)     (222,382)     (325,509)
        Sales of fixed maturities.........................................       6,640,245     8,220,230     7,336,706
        Sales of equity securities........................................         385,552       209,350       118,825
        Maturities of fixed maturities....................................           5,000        59,830        39,342
        Net realized gains on financial futures and option contracts......          57,076        26,678        39,788
        Acquisition of subsidiaries, net of cash acquired.................         (27,098)      (11,572)      (25,794)
        Other investments.................................................         (51,441)       (2,676)           --
                                                                               -----------   -----------   -----------

          Net cash flows used for investing activities....................          (9,832)     (501,932)     (379,111)
                                                                               -----------   -----------   -----------

Cash flows from financing activities
        Repurchase of Ordinary Shares.....................................        (182,648)      (58,003)      (33,514)
        Proceeds from exercise of options for shares......................           2,191            28           168
        Proceeds from shares issued under SAR Plan........................           4,156            --            --
        Dividends paid....................................................         (43,028)      (27,684)      (22,058)
                                                                               -----------   -----------   -----------

          Net cash used for financing activities..........................        (219,329)      (85,659)      (55,404)
                                                                               -----------   -----------   -----------

Net increase in cash......................................................          52,962        36,445         2,508
Cash - beginning of year..................................................          53,374        16,929        14,421
                                                                               -----------   -----------   -----------
Cash - end of year........................................................     $   106,336   $    53,374   $    16,929
                                                                               ===========   ===========   ===========
</TABLE>


          See accompanying notes to consolidated financial statements
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



1.  Organization

ACE Limited ("ACE" or "the Company") is incorporated with limited liability
under the Cayman Islands Companies Law and maintains its principal business
office in Bermuda. The Company, through its Bermuda-based operating
subsidiaries, A.C.E. Insurance Company, Ltd. ("ACE Insurance"), Corporate
Officers & Directors Assurance Ltd. ("CODA") and Tempest Reinsurance Company
Limited ("Tempest"), provides insurance and reinsurance for a diverse group of
international clients. In addition, the Company, through corporate subsidiaries,
provides funds at Lloyd's to support underwriting by Lloyd's syndicates managed
by Methuen Underwriting Limited ("MUL"), ACE London Aviation Limited ("ALA") and
ACE London Underwriting Limited ("ALU"), its indirect wholly owned subsidiaries.

On March 27, 1996, the Company acquired a controlling interest in Methuen Group
Limited ("Methuen"), the holding company for MUL, a leading Lloyd's managing
agency. This acquisition has been recorded using the purchase method of
accounting and accordingly, the accompanying consolidated financial statements
include the results of Methuen since March 27, 1996, the date of acquisition.
Had the results of Methuen been included commencing with operations in 1995, the
reported results would not have been materially affected.

On July 1, 1996, the Company completed the acquisition of Tempest, a leading
Bermuda-based property catastrophe reinsurer (the "Tempest Acquisition"). Under
the terms of the Agreement and Plan of Amalgamation, Tempest shares outstanding
at the time of the acquisition were cancelled and converted into the right to
receive 13,333,247 Ordinary Shares of the Company. These shares were capitalized
at a value of $46 2/3 per share, which was determined in accordance with the
EITF 95-19 concensus that deals with the value of equity securities issued to
effect a purchase combination. In addition, options to acquire Tempest shares
were converted into 446,089 Company options at a total cost of $12.1 million.
The total value of the acquisition amounted to $638.7 million, which includes
the value of the shares and options issued as well as other transaction expenses
which amounted to $4.4 million. This acquisition has been recorded using the
purchase method of accounting and accordingly, the accompanying consolidated
financial statements include the results of Tempest since July 1, 1996, the date
of acquisition (see note 15 for pro forma financial information with respect to
the Tempest Acquisition).

On November 26, 1996, the Company acquired Ockham Worldwide Holdings plc which
subsequently changed its name to ACE London Holdings Ltd. ("ACE London"). ACE
London owns two Lloyd's managing agencies, ALA and ALU. The acquisition has been
recorded using the purchase method of accounting and accordingly, the
accompanying consolidated financial statements include the results of ACE London
since November 26, 1996, the date of acquisition. Had the results of ACE London
been included commencing with operations in 1996, the reported results would not
have been materially affected.

On November 26, 1996, the Company, also acquired the remaining 49 percent
interest in Methuen. The Company had originally acquired a 51 percent interest
in Methuen on March 27, 1996. The acquisition of the remaining 49 percent
interest has been recorded using the purchase method of accounting.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)




1.  Organization (cont'd.)

On September 18, 1997, the Company announced it had executed a definitive
agreement for the acquisition, through a newly-created U.S. holding company, of
Westchester Specialty Group, Inc. ("WSG"), an indirect wholly owned subsidiary
of Xerox Corporation. WSG, through its insurance subsidiaries, provides
specialty commercial property and umbrella liability coverages in the U.S. Under
the terms of the agreement, the Company will purchase all of the outstanding
capital stock of WSG for aggregate cash consideration of approximately $333
million. In connection with the acquisition, National Indemnity, a subsidiary of
Berkshire Hathaway, will provide $750 million (75 percent quota share of $1
billion) of reinsurance protection to WSG with respect to their loss reserves
for the 1996 and prior accident years. The acquisition, which is subject to,
among other matters, regulatory approval and other customary closing conditions,
is expected to close in early 1998.

On September 30, 1997, the Company announced the incorporation of ACE Insurance
Company Europe Limited ("AICE"), as part of the International Financial Services
Centre in Dublin, Ireland. AICE has been granted a license to write all 18
classes of non-life insurance in all member states of the European Union.

2.  Operations

a) Insurance operations

The Company, through ACE Insurance and CODA, writes excess liability insurance,
directors and officers liability insurance, satellite insurance, aviation
insurance, excess property insurance and financial lines products. At September
30, 1997 approximately 67 percent of the Company's written premiums with respect
to these lines of business came from North America with approximately 23 percent
coming from the United Kingdom and continental Europe and approximately 10
percent from other countries.

Two insurance brokers produced approximately 59 percent, 42 percent and 59
percent of the Company's insurance business for ACE Insurance and CODA in 1997,
1996 and 1995. 

The Company writes excess liability coverage on an occurrence first reported
stand alone form to a maximum of $200 million per occurrence and annual
aggregate. The minimum attachment point for this excess liability coverage is
generally $100 million; however, for certain classes of non-U.S. domiciled
insureds the Company allows a minimum attachment point of $50 million. For all
new and renewal business, effective on or after December 15, 1994, the Company
reduced the maximum limits offered for integrated occurrences from $200 million
to $100 million. The Company maintains excess of loss clash reinsurance to
protect it from losses arising from a single set of circumstances (occurrence)
covered by more than one excess liability insurance policy. The reinsurance
provides protection to a maximum of $150 million, and in the aggregate excess of
$225 million, for each and every loss occurrence involving three or more
insureds. Integrated occurrences are specifically excluded. There have been no
reinsurance recoveries to date on this reinsurance. Total clash reinsurance
premiums expensed were $5.0 million for fiscal 1997, $7.9 million for fiscal
1996 and $7.8 million in fiscal 1995.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



2.  Operations (Cont'd.)

a) Insurance operations (Cont'd.)

The Company offers excess directors and officers liability coverage with a
maximum policy limit of $50 million and a minimum attachment point, in most
circumstances, of $25 million. This coverage is frequently written on a
following form basis to underlying policies. The Company also provides up to $75
million of either primary, excess or excess and difference-in-conditions
directors and officers liability coverage for claims with respect to losses not
covered by corporate reimbursement. In all cases coverage is on a claims made
basis. The Company does not purchase reinsurance for its directors and officers
liability risks.

The Company's satellite insurance operations offers separate gross limits of up
to $50 million per risk for launch insurance, including ascent to orbit and/or
initial testing and up to $50 million per risk for in-orbit insurance. The
Company has entered into a surplus treaty arrangement which provides for up to
$25 million of reinsurance on each risk. Prior to February 1996, the Company
offered separate limits of up to $25 million per risk, which was fully retained
by the Company.

The Company currently offers aviation insurance with limits of up to $150
million per insured, with no minimum attachment point. The Company reduces its
net exposure to approximately $50 million with a dedicated reinsurance program.
Classes of business written include aviation product liability, aircraft
manufacturer's hull and liability, airport liability, aviation refueling
operations and associated aircraft liability risks.

The Company offers global excess property "all risk" insurance, providing limits
of up to a maximum of $50 million per occurrence with a minimum attachment point
generally of $25 million. Coverage includes such perils as windstorm, earthquake
and fire, as well as explosion. Consequential business interruption coverage is
also offered. In certain circumstances, the Company uses reinsurance to
establish the retained net limit per risk.

The Company's financial lines product group offers specifically designed
financial, insurance and reinsurance solutions to address complex risk
management problems. The programs offered typically have the following common
characteristics: multi-year contract terms, broad coverage that includes stable
capacity and pricing for the insured, aggregate policy limits and insured
participation in the results of their own loss experience. Each contract is
unique because it is tailored to the insurance or reinsurance needs, specific
loss history and financial strength of the insured. Premium volume, as well as
the number of contracts written, can vary significantly from period to period
due to the nature of the contracts being written. Profit margins may vary from
contract to contract depending on the amount of underwriting risk and investment
risk assumed on each contract. The Company has purchased a multi-year
reinsurance contract which protects a number of financial lines inwards programs
exposed to natural perils.

In March 1997, the Company, together with two other insurance companies, formed
a managing general agency in Bermuda to provide underwriting services to the
three organizations for political risk insurance coverage. The new company,
Sovereign Risk Insurance Ltd. ("Sovereign") issues subscription policies with
the Company assuming 50 percent of each risk underwritten. The Company currently
cedes 10 percent of all risks assumed from Sovereign. Sovereign offers limits of
up to $50 million per project and $100 million per country.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



2.  Operations (Cont'd.)

b) Reinsurance operations

The Company, through Tempest, underwrites property catastrophe reinsurance on a
worldwide basis, emphasizing excess layer coverages, and has large aggregate
exposures to man-made and natural disasters. Tempest underwrites principally on
an excess of loss basis, with attachment points designed to minimize claims from
relatively high frequency and low severity events. For the year ended September
30, 1997, approximately 68 percent of Tempest's written premiums came from the
United States, approximately 13 percent came from United Kingdom, 6 percent from
Australia and New Zealand and 13 percent from other countries.

Two reinsurance brokers produced approximately 46 percent and 33 percent of
Tempest's reinsurance business for the year ended September 30, 1997 and the ten
month period ended September 30, 1996.

In April 1997, ACE Insurance signed a quota share treaty reinsurance agreement
with the Multilateral Investment Guarantee Agency ("MIGA"), part of the World
Bank Group. MIGA provides coverage for foreign investments in developing
countries. The agreement allows MIGA to provide private investors and developing
countries additional capacity to support developmentally sound investment
projects. The coverages offered will be the same as those offered by MIGA's
guarantee program, namely, transfer restriction, expropriation, war and civil
disturbance and breach of contract. The quota share treaty offers limits of up
to $25 million per contract with an aggregate of $100 million per country.

As discussed in note 2(a), the Company's financial lines product group also
offers reinsurance products and the Lloyd's syndicates in which the Company
participates also participate in certain reinsurance markets (see note 2 (c)).

c) Lloyd's operations

The Company, through corporate subsidiaries, participates in the underwriting of
syndicates managed by MUL, ALA and ALU by providing funds at Lloyd's, primarily
in the form of a letter of credit, supporting underwriting capacity. The
syndicates in which the Company participates underwrite aviation, marine and 
non-marine risks. For the 1996, 1997 and 1998 years of account, the Company has
or will provide funds at Lloyd's to support up to approximately $37 million,
$229 million and $485 million, respectively, of underwriting capacity to
syndicates managed by MUL, ALA and ALU. Underwriting capacity is the amount of
gross premiums that a syndicate at Lloyd's can underwrite in a given year of
account. However, a syndicate is not required to fully utilize all of the
capacity and it is not unusual for capacity utilization to be significantly
lower than 100 percent.

3.  Significant accounting policies

a) Basis of presentation

The accompanying consolidated financial statements have been prepared in
accordance with accounting principles generally accepted in the United States of
America ("GAAP") and include the accounts of the Company and its subsidiaries.
The Company records its proportionate share of the results of the Lloyd's
syndicates in which it participates. All significant intercompany balances and
transactions have been eliminated. Certain items in the prior year financial
statements have been reclassified to conform with the current year presentation.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



3.  Significant accounting policies (Cont'd.)

b) Investments

The Company's investments are considered to be "available for sale" under the
definition included in the Financial Accounting Standard Board's ("FASB")
Statement of Financial Accounting Standards No. 115 "Accounting for Certain
Investments in Debt and Equity Securities". Except for "other investments", the
Company's investment portfolio is reported at fair value, being the quoted
market price of these securities provided by either independent pricing
services, or when such prices are not available, by reference to broker or
underwriter bid indications. Realized gains or losses on sales of investments
are determined on a first-in, first-out basis and include adjustments to the net
realizable value of investments for declines in value that are considered to be
other than temporary. Unrealized gains and losses are reported as a separate
component of shareholders' equity.

Short-term investments comprise securities due to mature within one year of date
of issue.

Other investments comprise investments in entities for which there is no quoted
market value. It is not practicable to estimate the fair value of the
investments and thus they are carried at original cost.

The Company utilizes financial futures and option contracts and foreign currency
forward and option contracts for the purpose of managing certain investment
portfolio exposures (see note 7(a) for additional discussion of the objectives
and strategies employed). Futures contracts are not recognized as assets or
liabilities in the accompanying consolidated financial statements. Changes in
the market value of futures contracts produce daily cash flows, which are
included in net realized gains or losses on investments in the statements of
operations. Collateral held by brokers equal to a percentage of the total value
of open futures contracts is included in short-term investments.

Option contracts that are designated as hedges of securities are marked-to-
market. Unrealized gains and losses on forward currency and option contracts
which are designated as specific hedges are recognized in the financial
statements as a component of shareholders' equity. Gains and losses resulting
from currency fluctuations on transactions which are not designated as specific
hedges against any single security or group of securities are recognized as a
component of income in the period in which the fluctuations occur. Premiums paid
or received on option contracts that have expired, been closed out or exercised,
are recognized as realized gains and losses on investments in the statements of
operations.

Net investment income includes interest and dividend income together with
amortization of market premiums and discounts and is net of investment
management and custody fees and loan expense. For mortgage-backed securities,
and any other holdings for which there is a prepayment risk, prepayment
assumptions are evaluated and revised as necessary. Any adjustments required due
to the resultant change in effective yields and maturities are recognized in
current income.

c) Premiums

Premiums are generally recognized as written upon inception of the policy. For
multi-year policies written which are payable in annual installments, due to the
ability of the insured/reinsured to commute or cancel coverage within the term
of the policy, only the annual premium is included as written at policy
inception. The remaining annual premiums are included as written at each
successive anniversary date within the multi-year term.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



3.  Significant accounting policies (Cont'd.)

c) Premiums (Cont'd.)

Premiums written are primarily earned on a daily pro rata basis over the terms
of the policies to which they relate. Accordingly, unearned premiums represent
the portion of premiums written which is applicable to the unexpired portion of
the policies in force. Premium estimates for retrospectively rated policies are
recognized within the periods in which the related losses are incurred.

Property catastrophe reinsurance premiums written are estimated based on
information provided by ceding companies. The information used in establishing
these estimates is reviewed and subsequent adjustments are recorded in the
period in which they are determined. These premiums are earned over the terms of
the related reinsurance contracts.

d) Acquisition costs

Acquisition costs, consisting primarily of commissions, are deferred and
amortized over the period in which the related premiums are earned. Deferred
acquisition costs are reviewed to determine that they do not exceed recoverable
amounts after considering investment income.

e) Losses and loss expenses

A reserve is established for the estimated unpaid losses and loss expenses of
the Company under the terms of, and with respect to, its policies and
agreements. The methods of determining such estimates and establishing the
resulting reserve are reviewed continuously and any adjustments are reflected in
operations in the period in which they become known. Future developments may
result in losses and loss expenses significantly greater or less than the
reserve provided.

f) Goodwill

The Company amortizes goodwill recorded in connection with its business
combinations on a straight-line basis over the lesser of the expected life of
the related operations acquired or forty years. Amortization of goodwill
amounting to $5.1 million and $1.3 million with respect to the Tempest
Acquisition is included in administrative expenses in the statements of
operations for the years ended September 30, 1997 and 1996, respectively.

g) Translation of foreign currencies

Financial statements of subsidiaries expressed in foreign currencies are
translated into U.S. dollars in accordance with Statement of Financial
Accounting Standards No. 52 "Foreign Currency Translation" ("FAS 52"). Under FAS
52, functional currency assets and liabilities are translated into U.S. dollars
generally using period end rates of exchange and the related translation
adjustments are recorded as a separate component of shareholders' equity.
Functional currencies are generally the currencies of the local operating
environment. Statement of operations amounts expressed in functional currencies
are translated using average exchange rates. Gains and losses resulting from
foreign currency transactions are recorded in current income.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


   3.  Significant accounting policies (Cont'd.)

   h) Accounting estimates

   The preparation of financial statements in conformity with GAAP requires
   management to make estimates and assumptions that affect the reported amounts
   of assets and liabilities and disclosure of contingent assets and liabilities
   at the date of the financial statements and the reported amounts of revenues
   and expenses during the reporting period. The Company's principal estimates
   include property and casualty loss and loss expense reserves and estimated
   premiums for situations where the Company has not received ceding company
   reports. Actual results may differ from these estimates.

   i) Earnings per share

   Earnings per share are computed using net income divided by the weighted
   average number of Ordinary Shares outstanding and, if dilutive, shares
   issuable under outstanding options. There is no material difference between
   primary and fully diluted earnings per share.

   j) Cash flow information

   Purchases and sales or maturities of short-term investments are recorded net
   for purposes of the statements of cash flows and are included with fixed
   maturities.

   4.  Investments

   a) Fixed maturities

   The fair values and amortized costs of fixed maturities at September 30, 1997
   and 1996 are as follows:

   <TABLE>
   <CAPTION>
                                         1997                      1996
                                -----------------------   -----------------------
                                  Fair       Amortized      Fair       Amortized
                                  Value         Cost        Value         Cost
                                ----------   ----------   ----------   ----------
                                                  (in thousands)
   <S>                          <C>          <C>          <C>          <C>
   U.S. Treasury and agency.... $  505,783   $  488,961   $  973,362   $  971,615
   Non-U.S. governments........    158,506      157,206      190,999      191,727
   Corporate securities........  1,283,606    1,255,837      950,532      948,694
   Mortgage-backed securities..  1,342,441    1,324,507    1,274,869    1,282,401
                                ----------   ----------   ----------   ----------
     Fixed maturities.......... $3,290,336   $3,226,511   $3,389,762   $3,394,437
                                ==========   ==========   ==========   ==========
   </TABLE> 
 
   The gross unrealized gains and losses related to fixed maturities at
September 30, 1997 and 1996 are as follows:

   <TABLE> 
                                         1997                       1996
                                ------------------------   ----------------------
                                   Gross         Gross        Gross        Gross                   
                                Unrealized    Unrealized   Unrealized   Unrealized                 
                                   Gains        Losses        Gains       Losses  
                                ----------   -----------   ----------   ----------                 
                                                  (in thousands)
   <S>                          <C>          <C>           <C>          <C> 
   U.S. Treasury and agency.... $   17,769   $     (947)   $   8,254    $   (6,507)
   Non-U.S. governments........      4,003       (2,703)       3,752        (4,480)
   Corporate securities........     29,800       (2,031)      11,271        (9,433)
   Mortgage-backed securities..     21,678       (3,744)      11,251       (18,783)
                                ----------   ----------    ---------    ----------
                                $   73,250   $   (9,425)   $  34,528    $  (39,203)
                                ==========   ==========    =========    ==========
   </TABLE>

<PAGE>

                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


4.  Investments (Cont'd.)

a) Fixed maturities (Cont'd.)

Mortgage-backed securities issued by U.S. government agencies are combined with
all other mortgage derivatives held and are included in the category "mortgage-
backed securities". Approximately 67 percent of the total mortgage holdings at
September 30, 1997 and 72 percent at September 30, 1996 are represented by
investments in GNMA, FNMA and FHLMC bonds. The remainder of the mortgage
exposure consists of CMO's (Collaterialized Mortgage Obligations) and non-
government mortgage-backed securities, the majority of which provide a planned
structure for principal and interest payments and carry a "AAA" rating by the
major credit rating agencies. Fixed maturities at September 30, 1997, by
contractual maturity, are shown below. Expected maturities could differ from
contractual maturities because borrowers may have the right to call or prepay
obligations, with or without call or prepayment penalties.
<TABLE>
<CAPTION>


                                                             Fair    Amortized
                                                            Value       Cost
                                                          ---------- ----------
                                                              (in thousands)
<S>                                                       <C>        <C>
Maturity period
- ---------------
Less than 1 year......................................... $  181,317 $  180,289
1-5 years................................................    459,568    455,704
5-10 years...............................................    608,143    599,972
Greater than 10 years....................................    698,867    666,039
                                                          ---------- ----------

                                                           1,947,895  1,902,004

Mortgage-backed securities...............................  1,342,441  1,324,507
                                                          ---------- ----------

     Total fixed maturities.............................. $3,290,336 $3,226,511
                                                          ========== ==========
</TABLE>

b)  Equity securities

The gross unrealized gains and losses on equity securities at September 30,
1997 and 1996 are as follows:

<TABLE>
<CAPTION>


                                                             1997       1996
                                                           ---------  ---------
                                                               (in thousands)
<S>                                                       <C>        <C>
Equity securities - cost.................................  $ 502,481  $ 257,049
Gross unrealized gains...................................    152,406     81,935
Gross unrealized losses..................................    (19,917)   (15,979)
                                                           ---------  ---------

     Equity securities - fair value....................... $ 634,970  $ 323,005
                                                           =========  =========

</TABLE>

<PAGE>
 

                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


4. Investments (Cont'd.)


c) Net realized gains and change in net unrealized appreciation (depreciation)
on investments

The analysis of net realized gains on investments and the change in net
unrealized appreciation (depreciation) on investments for the years ended
September 30, 1997, 1996 and 1995 is as follows:

<TABLE>
<CAPTION>
                                                                                 1997       1996       1995
                                                                               --------   --------   --------
                                                                                       (in thousands)
<S>                                                                            <C>        <C>        <C>
Fixed maturities
  Gross realized gains.....................................................    $ 83,933   $ 63,416   $ 78,021
  Gross realized losses....................................................     (24,892)   (48,963)   (69,669)
                                                                               --------   --------   --------
                                                                                 59,041     14,453      8,352

Equity securities
  Gross realized gains.....................................................      70,449     39,768     15,371
  Gross realized losses....................................................     (32,379)   (23,985)   (11,763)
                                                                               --------   --------   --------
                                                                                 38,070     15,783      3,608

Currency losses............................................................     (26,204)    (1,685)      (983)
Financial futures and option contracts - net realized gains................      57,075     26,678     39,788
                                                                               --------   --------   --------

    Net realized gains on investments......................................     127,982     55,229     50,765
                                                                               --------   --------   --------

Change in net unrealized appreciation (depreciation) on investments
  Fixed maturities.........................................................      68,500    (56,226)   131,236
  Equity securities........................................................      66,533     22,813     43,143
  Short-term investments...................................................        (120)       --         --
                                                                               --------   --------   --------

    Change in net unrealized appreciation (depreciation) on investments....     134,913    (33,413)   174,379
                                                                               --------   --------   --------

Total net realized gains and change in net unrealized appreciation
  (depreciation) on investments............................................    $262,895   $ 21,816   $225,144
                                                                               ========   ========   ========
</TABLE>
 
d) Net investment income
 
Net investment income for the years ended September 30, 1997, 1996 and 1995 was
derived from the following sources:

<TABLE>
<CAPTION>
                                                                                 1997       1996       1995
                                                                               --------   --------   --------
                                                                                       (in thousands)
<S>                                                                            <C>        <C>        <C>
Fixed maturities and short-term investments................................    $236,998   $210,517   $184,240
Equity securities..........................................................       6,178      1,480        944
Other investments..........................................................       2,300      1,840      1,736
Other......................................................................       2,304        156        774
                                                                               --------   --------   --------
  Gross investment income..................................................     247,840    213,993    187,694
Investment expenses........................................................      (9,800)    (7,217)    (5,662)
Loan expense...............................................................        (217)      (252)      (336)
Amortization of acquisition liabilities....................................         --         --        (321)
                                                                               --------   --------   --------

  Net investment income....................................................    $237,823   $206,524   $181,375
                                                                               ========   ========   ========
</TABLE>
<PAGE>
 

                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


5. Losses and loss expenses

The reserve for unpaid losses and loss expenses represents estimated ultimate
losses and loss expenses less paid losses and loss expenses and is comprised of
the following at September 30, 1997 and 1996:

<TABLE>
<CAPTION>
                                                                                 1997             1996
                                                                               ----------       ----------
                                                                                     (in thousands)
<S>                                                                            <C>              <C>
Case and loss expense reserves.............................................    $  924,221       $  993,671
IBNR loss reserves.........................................................       945,774          842,442
                                                                               ----------       ----------

    Total unpaid losses and loss expenses..................................    $1,869,995       $1,836,113
                                                                               ==========       ==========
</TABLE>

The Company uses statistical and actuarial methods to reasonably estimate
ultimate expected losses and loss expenses using the Company's loss development
history, data obtained from underwriting applications, actuarial evaluations
and, in the case of excess liability reserves, research of large liability
losses. In many cases, significant periods of time, ranging up to several years
or more, may lapse between the occurrence of an insured loss, the reporting of
the loss to the Company and the settlement of the Company's liability for the
loss. During the loss settlement period, additional facts regarding individual
claims and trends usually will become known. As these become apparent, case
reserves may be adjusted by allocation from IBNR loss reserves without any
change in the overall reserve. In addition, application of the statistical and
actuarial methods may require the adjustment of the overall reserves from time
to time.

The reconciliation of unpaid losses and loss expenses for the years ended
September 30, 1997, 1996 and 1995 is as follows:

<TABLE>
<CAPTION>
                                                                                  1997         1996         1995
                                                                               ------------------------------------
                                                                                          (in thousands)
<S>                                                                            <C>          <C>          <C>
Unpaid losses and loss expenses at beginning of year.......................    $1,836,113   $1,437,930   $1,160,392
Unpaid losses and loss expenses assumed in respect of acquired companies...           --        34,735          --
                                                                               ----------   ----------   ----------
    Total..................................................................     1,836,113    1,472,665    1,160,392
                                                                               ----------   ----------   ----------

Losses and loss expenses incurred in respect of losses occurring in:
  Current year.............................................................       435,941      464,824      350,653
  Prior years..............................................................           --           --           --
                                                                               ----------   ----------   ----------
    Total..................................................................       435,941      464,824      350,653
                                                                               ----------   ----------   ----------

Losses and loss expenses paid in respect of losses occurring in:
  Current year.............................................................        52,547       39,567       14,394
  Prior years..............................................................       349,512       61,809       58,721
                                                                               ----------   ----------   ----------
    Total..................................................................       402,059      101,376       73,115
                                                                               ----------   ----------   ----------

    Unpaid losses and loss expenses at end of year.........................    $1,869,995   $1,836,113   $1,437,930
                                                                               ==========   ==========   ==========
</TABLE>
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


   5. Losses and loss expenses (Cont'd.)

   A number of the Company's insureds have given notice of claims relating to
   breast implants or components or raw material thereof that had been produced
   and/or sold by such insureds. Lawsuits including class actions, involving
   thousands of implant recipients have been filed in both state and federal
   courts throughout the United States. Most of the federal cases have been
   consolidated pursuant to the rules for Multidistrict Litigation to a Federal
   District Court in Alabama.

   On May 15, 1995, the Dow Corning Corporation, a significant defendant, filed
   for protection under Chapter 11 of the U.S. Bankruptcy Code and claims
   against Dow Corning remain stayed subject to the Bankruptcy Code.

   On October 1, 1995, negotiators for three of the major defendants agreed on
   the essential elements of a revised individual settlement plan for U.S.
   claimants with at least one implant from any of those manufacturers ("the
   Settlement"). In general, under the Settlement, the amounts payable to
   individual participants, and the manufacturers' obligations to make those
   payments, would not be affected by the number of claimants electing to opt
   out from the new plan. Also, in general, the compensation would be fixed and
   not affected by the number of participants, and the manufacturers would not
   have a right to walk away because of the amount of claims payable. Finally,
   each defendant agreed to be responsible only for cases in which its implant
   was identified, and not for a percentage of all claims.

   By November 13, 1995, the Settlement was approved by the three major
   defendants. In addition, two other defendants became part of the Settlement,
   although certain of their settlement terms are different and more restricted
   than the plan offered by the original three defendants.

   On December 22, 1995, the multidistrict litigation judge approved the
   Settlement and the materials for giving notice to claimants although an
   appeal concerning the Settlement is pending with the Eleventh Circuit Court
   of Appeals. Beginning in mid-January, 1996, the three major defendants have
   each made payments to a court-established fund for use in making payments
   under the Settlement. The Settlement Claims Office had reported that as of
   August 29, 1997, it has sent out Notification of Status Letters to 361,377
   non-opt-out domestic implant recipients who had registered with the
   Settlement Claims Office. As of August 31, 1997, approximately $518 million
   had been distributed under the Settlement to implant recipients of the three
   major defendants. Certain potential payments to claimants relating to other
   implants remain suspended because of the pending appeals. The Settlement
   Claims Office has also reported that approximately 32,500 domestic
   registrants (out of the 361,377 domestic registrants sent Notification of
   Status Letters) exercised opt-out rights after receiving their status
   letters. Previously, approximately 19,000 other domestic implant recipients
   had exercised opt-out rights in 1994 and/or before receiving status letters.

   At June 30, 1994, the Company increased its then existing reserves relating
   to breast implant claims. Although the reserve increase was partially
   satisfied by an allocation from existing IBNR, it also required an increase
   in the Company's total reserve for unpaid losses and loss expenses at June
   30, 1994 of $200 million. The increase in reserves was based on information
   made available in conjunction with the lawsuits and information made
   available from the Company's insureds and was predicated upon an allocation
   between coverage provided before and after the end of 1985 (when the Company
   commenced underwriting operations). No additional reserves relating to breast
   implant claims have been added since June 30, 1994.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



5.  Losses and loss expenses (Cont'd.)

The Company continually evaluates its reserves in light of developing
information and in light of discussions and negotiations with its insureds.
During 1997, the Company made payments of approximately $250 million with
respect to breast implant claims. These payments were included in previous
reserves and are consistent with the Company's belief that its reserves are
adequate. Significant uncertainties continue to exist with regard to the
ultimate outcome and cost of the Settlement and value of the opt-out claims.
While the Company is unable at this time to determine whether additional
reserves, which could have a material adverse effect upon the financial
condition, results of operations and cash flows of the Company, may be necessary
in the future, the Company believes that its reserves for unpaid losses and loss
expenses including those arising from breast implant claims are adequate as at
September 30, 1997.

6. Reinsurance

The Company purchases reinsurance to manage various exposures including
catastrophic risks. Although reinsurance agreements contractually obligate the
Company's reinsurers to reimburse it for the agreed upon portion of its gross
paid losses, they do not discharge the primary liability of the Company. The
Company evaluates the financial condition of its reinsurers through internal
reinsurance committees consisting of certain members of senior management. No
single reinsurer is a material reinsurer to the Company nor is the Company's
business dependent on any reinsurance contract. The statements of operations
amounts for net premiums written and net premiums earned are net of reinsurance.
Direct, assumed and ceded amounts for these items for the years ended September
30, 1997, 1996 and 1995 are as follows:
<TABLE>
<CAPTION>
 
 
                          1997        1996        1995
                       ----------  ----------  ----------
                                 (in thousands)
<S>                    <C>         <C>         <C>
   Premiums written
      Direct.........  $ 611,633    $596,176    $416,040
      Assumed........    131,021      49,624      19,780
      Ceded..........   (102,910)    (43,093)    (11,064)
                       ---------    --------    --------
      Net............  $ 639,744    $602,707    $424,756
                       =========    ========    ========
 
   Premiums earned
      Direct.........  $ 594,043    $566,293    $425,569
      Assumed........    140,942      51,201      12,024
      Ceded..........    (90,147)    (30,249)     (8,932)
                       ---------    --------    --------
      Net............  $ 644,838    $587,245    $428,661
                       =========    ========    ========
 
</TABLE>

The Company's provision for loss recoveries on reinsurance ceded is not material
in each of the years ended September 30, 1997, 1996 and 1995.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



7.  Commitments and contingencies

a) Financial instruments with off-balance sheet risk

The Company's investment guidelines permit, subject to specific approval,
investments in derivative instruments such as futures, options and foreign
currency forward contracts for purposes other than trading. Their use is limited
to yield enhancement, duration management, foreign currency exposure management
or to obtain an exposure to a particular financial market.

  (i) Foreign currency exposure management

  The Company uses foreign currency forward and option contracts to minimize the
  effect of fluctuating foreign currencies on the value of non-U.S dollar
  securities currently held in the portfolio. Approximately $495 million is
  invested in non-U.S. dollar fixed maturity and equity securities. The forward
  currency contracts purchased are not specifically identifiable against any
  single security or group of securities denominated in those currencies and
  therefore do not qualify as hedges for financial reporting purposes. All
  contract gains and losses, realized and unrealized, are reflected in the
  statements of operations. At September 30, 1997, no foreign currency forward
  or option contract had a maturity of more than six months. The table below
  summarizes the notional amounts, the current fair values and the unrealized
  gain or loss of the Company's foreign currency forward and option contracts as
  at September 30, 1997.

<TABLE>
<CAPTION>
 
                                          Contractual/Notional                    Unrealized
                                                 Amount          Fair Value     Gains/(Losses)
                                          --------------------   ----------     --------------
                                                               (in thousands)
<S>                                       <C>                    <C>            <C>
     Forward contracts..................        $    43             $716            $ 673
     Foreign currency option contracts..         25,130              118             (293)

</TABLE>

  The fair value of the forward contracts represents the estimated cost to the
  Company at September 30, 1997, of obtaining the specified currency to meet the
  obligation of the contracts. The unrealized gain is a measure of the net
  exposure to the Company of its use of forward contracts after any netting
  agreements given current rates of exchange. The fair value of the options
  represents the market price of the options at September 30, 1997. The
  unrealized loss represents the difference between the fair value and the
  premium paid.
 
  The credit risk associated with the above derivative financial instruments
  relates to the potential for non-performance by counterparties. Non-
  performance is not anticipated; however, in order to minimize the risk of
  loss, management monitors the creditworthiness of its counterparties. For
  forward contracts, the counterparties are principally banks which must meet
  certain criteria according to the Company's investment guidelines.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



7.  Commitments and contingencies (Cont'd.)

    (ii) Duration management and market exposure

    Futures

    A portion of the Company's investment portfolio is managed as a synthetic
    equity fund, whereby S&P 500 index futures contracts are held in an amount
    equal to the market value of an underlying portfolio comprised of short-term
    investments and fixed maturities. This creates an equity market exposure
    equal in value to the total amount of funds invested in this strategy. Each
    index futures contract held by the Company is rolled over quarterly into a
    new contract with a later maturity, thereby maintaining a constant equity
    market exposure. The value of this fund was $286 million and $305 million at
    September 30, 1997 and 1996, respectively.

    Exchange traded bond and note futures contracts may be used in fixed
    maturity portfolios as substitutes for ownership of the physical bonds and
    notes without significantly increasing the risk in the portfolio.
    Investments in financial futures contracts may be made only to the extent
    that there are assets under management, not otherwise committed.

    Futures contracts give the holder the right and obligation to participate in
    market movements, determined by the index or underlying security on which
    the futures contract is based. Settlement is made daily in cash by an amount
    equal to the change in value of the futures contract times a multiplier that
    scales the size of the contract. The contract amounts of $380 million and
    $478 million reflect the net extent of involvement the Company had in these
    financial instruments at September 30, 1997 and 1996, respectively.

    Options

    Option contracts may be used in the portfolio as protection against
    unexpected shifts in interest rates, which would thereby affect the duration
    of the fixed maturity portfolio. By using options in the portfolio, the
    overall interest rate sensitivity of the account can be reduced. An option
    contract conveys to the holder the right, but not the obligation, to
    purchase or sell a specified amount or value of an underlying security at a
    fixed price. The price of an option is influenced by the underlying
    security, expected volatility, time to expiration and supply and demand.

    For long option positions, the maximum loss is the premium paid for the
    option. To minimize the risk of non-performance, all brokers and dealers
    used as counterparties must be approved. Additional performance assurance is
    required where deemed necessary. The maximum credit exposure is represented
    by the fair value of the options held. For short option positions, the
    potential loss is the same as having taken a position in the underlying
    security. Short call options are backed in the portfolio with the
    underlying, or highly correlated, securities and short put options are to be
    backed by uncommitted cash for the in-the-money portion. Summarized below
    are the notional amounts, the current fair values and the unrealized gains
    of the options in the portfolio as at September 30, 1997.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



7.  Commitments and contingencies (Cont'd.)
<TABLE>
<CAPTION>

                         Contractual/Notional                   Unrealized
                                Amount           Fair Value       Gains
                         ---------------------   -----------    ----------
                                               (in thousands)

<S>                      <C>                    <C>          <C>
      Options held.....        $ 374,000            $ 178          $ 88
      Options written..         (742,400)            (222)          579
</TABLE>

    The fair value of the options represents the market price of the options at
    September 30, 1997. The unrealized gain represents the difference between
    the fair value and the premium paid (received). The notional amounts
    summarized in the above tables are not representative of amounts exchanged
    by parties and, therefore, do not measure the exposure to the Company of its
    use of derivatives.

b) Concentrations of credit risk

The investment portfolio is managed following prudent standards of
diversification. Specific provisions limit the allowable holdings of a single
issue and issuers. All fixed maturity securities held must have an investment
grade rating. The Company believes that there are no significant concentrations
of credit risk associated with its investments.

c) Letters of credit

With effect from November 1996, the Company has a five year, secured letter of
credit, up to (Pounds)75 million (approximately $113 million) which is primarily
used to provide funds at Lloyd's to support underwriting capacity on Lloyd's
syndicates in which the Company participates (see note 9).

Tempest is not an admitted reinsurer in the United States. Accordingly, the
terms of certain reinsurance contracts require Tempest to provide letters of
credit ("LOCs") to Tempest's clients in respect of reported claims. Tempest has
a facility for the issuance of LOCs of up to $20 million. At September 30, 1997,
LOCs outstanding amounted to $6.9 million. Investments with a market value of
$8.0 million were pledged as collateral for these LOCs.

d) Lease commitments

The Company rents office space in The ACE Building in Hamilton, Bermuda under a
lease which expires in 2000, with one five year renewal option. The ACE Building
is 40 percent owned by the Company through a joint venture agreement. During
1994, the Company financed the cost of an addition to The ACE Building and
entered into a supplemental lease for the additional space for 14 years
effective October 1, 1994. The cost of the addition is being amortized as rent
expense over the period of the lease. Tempest also leases office space in
Hamilton, Bermuda under a non-cancelable lease expiring in 1998 with a three
year renewal option. Methuen currently leases office space in London, England
under a lease that expires in 2012. Methuen also leases an office in the 1986
Lloyd's Building in London, under a lease that expires in 2001. ACE London also
leases office space in London, England for its principal offices, under two
leases that expire in 2008. Total rent expense was approximately $4.7 million in
1997, $2.3 million in 1996 and $1.5 million in 1995. Subsequent to year end, the
Company consolidated the operations of Methuen and ACE London into one location
in London, England. The lease for this office space expires in 2012. As a result
of this consolidation, Methuen and ACE London will vacate their existing
premises and will either sublet the premises or surrender the leases. Future
minimum rental commitments under the leases, assuming the vacated premises are
sublet, are expected to be approximately $6.5 million per annum.
<PAGE>
 

                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


8.  Shareholders' equity

a)  Shares issued and outstanding

Following is a table of changes in Ordinary Shares issued and outstanding for
fiscal 1997, 1996 and 1995:

<TABLE>
<CAPTION>
                                                           Ordinary
                                                            Shares
                                                          -----------
   <S>                                                    <C>
   Balance at September 30, 1994........................  47,423,976
      Repurchase of shares..............................  (1,332,300)
      Exercise of stock options.........................      19,509
                                                          ----------
   Balance at September 30, 1995........................  46,111,185
      Shares issued in Tempest acquisition..............  13,333,247
        Repurchase of shares............................  (1,268,600)
      Exercise of stock options.........................       1,000
      Cancellation of non-vested restricted stock.......      (6,077)
                                                          ----------
   Balance at September 30, 1996........................  58,170,755
      Shares issued under Employee Stock Purchase Plan..       9,801
      Shares issued under SAR Plan......................      61,364
      Repurchase of shares..............................  (3,031,000)
      Exercise of stock options.........................      84,798
      Cancellation of non-vested restricted stock.......      (2,500)
                                                          ----------
   Balance at September 30, 1997........................  55,293,218
                                                          ==========
</TABLE>

b)  Share repurchases

The Board of Directors has authorized the repurchase from time to time of the
Company's Ordinary Shares in open market and private purchase transactions.
During 1997, the Company repurchased 3,031,000 Ordinary Shares under share
repurchase programs for an aggregate cost of $182.6 million. On May 9, 1997, the
Board of Directors terminated the then existing share repurchase programs and
authorized a new program for up to $300.0 million of the Company's Ordinary
Shares. As at September 30, 1997, approximately $268.0 million of the current
Board authorization had not been utilized. During 1996 the Company repurchased
1,268,000 Ordinary Shares under share repurchase programs for an aggregate cost
of $58.0 million, and during 1995 1,332,300 Ordinary Shares were repurchased by
the Company for a total cost of $33.5 million.

c) General restrictions

The holders of the Ordinary Shares are entitled to receive dividends and are
allowed one vote per share provided that, if the controlled shares of any
shareholder constitute 10 percent or more of the outstanding Ordinary Shares of
the Company, only a fraction of the vote will be allowed so as not to exceed 10
percent. Generally, the Company's directors have absolute discretion to decline
to register any transfer of shares. All transfers are subject to the restriction
that they may not increase to 10 percent or higher the proportion of issued
Ordinary Shares owned by any shareholder.
<PAGE>
 

                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


8.  Shareholders' equity (Cont'd.)

d) Dividends declared

Dividends declared amounted to $0.80, $0.64 and $0.50 per Ordinary Share for
fiscal 1997, 1996 and 1995, respectively.

e)   Options

     (i) Options outstanding

     Following is a table of changes in options outstanding for 1997, 1996 and
     1995:

<TABLE>
<CAPTION>
                                                           Year     Average   Options for
                                                            of      Exercise    Ordinary
                                                        Expiration   Price       Shares
                                                        ----------  --------  ------------
      <S>                                               <C>         <C>       <C>  
      Balance at September 30, 1994...................                            184,009
        Options granted...............................      2005      $24.19      536,000
        Options exercised.............................      1995      $ 8.59      (19,509)
        Options forfeited.............................   2003-2005    $26.83      (15,000)
                                                                                ---------
 
      Balance at September 30, 1995...................                            685,500
        Options granted...............................   2004-2005    $37.41      409,200
        Options issued to holders of Tempest options..   2004-2005    $23.69      446,089
        Options exercised.............................      2003      $27.50       (1,000)
        Options forfeited.............................   2003-2004    $25.64      (35,000)
                                                                                ---------

      Balance at September 30, 1996...................                          1,504,789
        Options granted...............................   2006-2007    $59.23      743,850
        Options issued under SAR Plan.................   2002-2003    $64.00      316,800
        Options exercised.............................   2003-2004    $27.99      (84,798)
        Options forfeited.............................   2003-2007    $30.28     (102,500)
                                                                                ---------
 
      Balance at September 30, 1997...................                          2,378,141
                                                                                =========
</TABLE>
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


8.  Shareholders' equity (Cont'd.)

e)  Options (Cont'd.)

      (ii) FAS 123 pro forma disclosures

      In October 1995, FASB issued Statement of Financial Accounting Standards
      No. 123 "Accounting for Stock-Based Compensation" ("FAS 123"). FAS 123
      establishes accounting and reporting standards for stock-based employee
      compensation plans which include stock option and stock purchase plans.
      FAS 123 provides employers a choice: adopt FAS 123 accounting standards
      for all stock compensation arrangements which requires the recognition of
      compensation expense for the fair value of virtually all stock
      compensation awards; or continue to account for stock options and other
      forms of stock compensation under Accounting Principles Board Opinion No.
      25 ("APB 25"), while also providing the disclosure required under FAS 123.
      The Company continues to account for stock-based compensation plans under
      APB 25. Had the compensation cost for this plan been determined in
      accordance with the fair value method recommended in FAS 123, the
      Company's net income and earnings per share would have been $454.2 million
      or $7.90 per share for 1997 and $289.0 million or $5.80 per share for
      1996.

      The fair value of the options issued is estimated on the date of grant
      using the Black-Scholes option-pricing model, with the following weighted-
      average assumptions used for grants in 1997 and 1996, respectively:
      dividend yield of 1.45 percent and 1.46 percent; expected volatility 26.2
      percent and 22.5 percent; risk free interest rate of 5.92 percent and 5.67
      percent; and an expected life of 3.5 years and 4.8 years.

9.  Line of credit

With effect from November 1996, the Company has a $50 million committed
unsecured line of credit provided by a syndicate of banks, led by Morgan
Guaranty Trust Company of New York ("Morgan"). The line of credit agreement
requires the Company to maintain consolidated tangible net worth of not less
than $1.25 billion. This same syndicate of banks have also provided a secured
letter of credit (see note 7(c)). Prior to November 15, 1996 the Company had a
committed line of credit provided by a syndicate of banks, led by Morgan which
provided for unsecured borrowings up to an aggregate amount of $150 million.

10. Employee benefit plans

a)  Pension plans

The Company has defined contribution pension plans for its Bermuda-based
employees, which are non-contributory and cover all full-time employees.
Contributions are based on a percentage of eligible compensation. Pension costs
amounted to $2,244,000, $1,741,000, and $1,206,000 for 1997, 1996 and 1995,
respectively.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


10.  Employee benefit plans  (Cont'd.)

b)   Options and Stock Appreciation Rights

In February 1996, shareholders of the Company approved the ACE Limited 1995 
Long-Term Incentive Plan (the "Incentive Plan") which incorporates stock
options, stock appreciation rights, restricted stock awards and stock purchase
programs. There are 2,300,000 Ordinary Shares of the Company available for award
under this Incentive Plan. This Incentive Plan superseded and replaced the
existing Equity Linked Incentive Plan, which incorporated both a Stock
Appreciation Rights Plan ("SAR Plan") and a Stock Option Plan ("Option Plan")
which will continue to run off. Stock options granted under the Incentive Plan
may be exercised for Ordinary Shares of the Company upon vesting. Under the
Incentive Plan, generally, options expire ten years after the award date and
vest in equal portions over three years. During 1997, 743,850 options were
issued under the Incentive Plan. In addition, 316,800 options were issued under
the SAR Plan. During 1996, 409,200 options were issued under the Incentive Plan
and 446,089 options were issued with respect to the Tempest acquisition (see
note 8 (e)).

Under the Option Plan, generally, options expire ten years after the award date
and are subject to a vesting period of four years. During 1995, 236,000 options
were granted (see note 8(e)).

Of the outstanding options at September 30, 1997, 880,443 were vested. In
addition to the Option Plan, the Company entered into an Option and Restricted
Share Agreement and Plan in connection with the employment of its Chairman,
President and Chief Executive Officer whereby, during the year ended September
30, 1995, he was awarded 300,000 stock options at an exercise price of $22.63
which may be exercised for Ordinary Shares. These options expire ten years after
the award date and vest at various dates up to September 30, 1999. The Chairman
also received 100,000 restricted stock under this agreement (see note 10(d)).

With respect to the SAR plan, certain stock appreciation rights were forfeited
in return for cash during the year. All remaining stock appreciation rights were
exercised in return for options and cash and/or shares of the Company under the
terms of the Replacement Plan. Total expenses incurred during 1997 relating to
the SAR plan, including those incurred under the Replacement Plan, amounted to
$5,500,000. In 1996 and 1995, compensation expense of $6,023,000 and $2,465,000
was recorded, respectively. The SAR Plan entitled participants the right to
receive cash equal to the appreciation in value, as provided for in the plan, of
the rights represented by the grant. Rights vested over a period of up to six
years from the date of grant. Participants were entitled to receive cash
payments equal to the amount of dividends paid on an equivalent number of
shares. Compensation expense was accrued and recorded based on the change in the
value of the stock appreciation rights during the year and the applicable
vesting period.
<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


10.  Employee benefit plans (Cont'd.)

c)   Employee Stock Purchase Plan

In February 1996, shareholders of the Company approved the ACE Limited Employee
Stock Purchase Plan. Participation in the plan is available to all eligible
employees. Maximum annual purchases by participants are limited to the number of
whole shares that can be purchased by an amount equal to 10 percent of the
participant's compensation or $25,000, whichever is less. Participants may
purchase shares at a purchase price equal to 85 percent of the closing market
price of the Company's shares on the last day of each subscription period.
Subscription periods run for six months. With respect to the year ending
September 30, 1997, 9,801 shares were subscribed for, resulting in an expense of
$74,000 to the Company.

d)  Restricted stock awards

During 1997, 49,725 restricted Ordinary Shares were awarded to officers of the
Company and its subsidiaries. These shares vest at various dates through
November 1999. In addition, 5,028 restricted Ordinary Shares were awarded to
outside directors of the Company under the terms of the 1995 Outside Directors
Plan ("the Plan"). These shares vest in February 1998. Also during 1997, 2,500
restricted Ordinary Shares were forfeited due to resignations by officers of the
Company and its subsidiaries.

During 1996, 9,000 restricted Ordinary Shares were awarded to an officer of the
Company. These shares vest at various dates up to July 1999. Also, during 1996,
6,734 restricted Ordinary Shares were awarded to outside directors of the
Company under the terms of the Plan. These shares vested in February 1997. All
non-vested restricted Ordinary Shares issued to directors prior to approval of
the Plan in February 1996 were canceled upon approval of the Plan. Subsequently,
two directors resigned resulting in the forfeiture of their restricted Ordinary
Shares awards. During 1995, 102,400 restricted Ordinary Shares were awarded
principally to the Chairman and four directors of the Company. The Chairman's
award vests at various dates up to September 30, 1999. All restricted stock
awards contain restrictions relating to, among other things, transferability and
forfeiture under certain circumstances.

At the time of grant the market value of the shares awarded under these grants
is recorded as unearned stock grant compensation and is presented as a separate
component of shareholders' equity. The unearned compensation is charged to
operations over the vesting period.

11.  Related party transactions

Included in net premiums written are amounts related to policies held by
shareholders of the Company of approximately $17 million, $31 million and $43
million for 1997, 1996 and 1995, respectively.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)


12.  Taxation

Under current Cayman Islands law, the Company is not required to pay any taxes
on its income or capital gains. The Company has received an undertaking that, in
the event of any taxes being imposed, the Company will be exempted from taxation
in the Cayman Islands until the year 2013.

Under current Bermuda law, the Company and its Bermuda subsidiaries are not
required to pay any taxes on its income or capital gains. The Company has
received an undertaking from the Minister of Finance in Bermuda that, in the
event of any taxes being imposed, the Company will be exempt from taxation in
Bermuda until March 2016.

Income from the Company's operations at Lloyd's are subject to United Kingdom
corporation taxes.


13.  Statutory financial data

Under the Bermuda Insurance Act 1978, (as amended by the Insurance Amendment Act
1995) and Related Regulations the Company's Bermuda-based insurance and
reinsurance subsidiaries ("the Bermuda subsidiaries") are required to file an
annual Statutory Financial Return and Statutory Financial Statements and to
maintain certain measures of solvency and liquidity during each year. Statutory
capital and surplus of the Bermuda subsidiaries was $2,265 million, $1,885
million and $1,327 million at September 30, 1997, 1996 and 1995 and statutory
net income was $489 million, $301 million and $249 million for 1997, 1996 and
1995, respectively. Statutory capital and surplus and statutory net income
include the results of Tempest from July 1, 1996, the date of acquisition by the
Company. The principal difference between statutory capital and surplus and
statutory net income of the Bermuda subsidiaries and shareholders' equity and
net income as reported in conformity with GAAP relates to deferred acquisition
costs of the subsidiaries, goodwill and assets and financial activity of the
parent company.

There are no statutory restrictions on the payment of dividends from retained
earnings by any of the Bermuda subsidiaries as the minimum statutory capital and
surplus requirements are satisfied by the share capital and additional paid-in
capital of each of the Bermuda subsidiaries.

<PAGE>
 
                         ACE LIMITED AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Cont'd.)



14.  Condensed unaudited quarterly financial data
<TABLE>
<CAPTION>
 
                                                          First     Second      Third     Fourth    
                                                         Quarter    Quarter    Quarter   Quarter    
                                                         -------    -------    -------   -------    
                                                          (in thousands, except per share data)     
<S>                                                      <C>       <C>        <C>        <C>        
                                                                                                    
1997                                                                                                
     Net premiums earned.........................        $164,400  $158,641   $163,605   $158,192   
     Net investment income.......................          59,738    58,094     59,545     60,446   
     Net realized gains (losses) on investments..          41,723    (2,339)    45,786     42,812   
                                                         --------  --------   --------   --------   
                                                                                                    
          Total revenues.........................        $265,861  $214,396   $268,936   $261,450   
                                                         ========  ========   ========   ========   
                                                                                                    
     Losses and loss expenses....................        $110,150  $105,290   $111,380   $109,121   
                                                         ========  ========   ========   ========   
                                                                                                    
     Net income..................................        $125,741  $ 77,949   $130,038   $127,626   
                                                         ========  ========   ========   ========   
                                                                                                    
     Earnings per share..........................           $2.14     $1.34      $2.30      $2.26   
                                                         ========  ========   ========   ========   
                                                                                                    
                                                                                                    
                                                          First     Second     Third      Fourth    
                                                         Quarter   Quarter    Quarter    Quarter    
                                                         -------   -------    -------    -------    
                                                          (in thousands, except per share data)
                                                                                                    
1996                                                                                                
     Net premiums earned.........................        $115,984  $146,393   $145,897   $178,971   
     Net investment income.......................          47,126    48,312     50,641     60,445   
     Net realized gains (losses) on investments..          44,602     5,261     (1,633)     6,999   
                                                         --------  --------   --------   --------   
                                                                                                    
          Total revenues.........................        $207,712  $199,966   $194,905   $246,415   
                                                         ========  ========   ========   ========   
                                                                                                    
     Losses and loss expenses....................        $ 92,924  $121,076   $120,438   $130,386   
                                                         ========  ========   ========   ========   
                                                                                                    
     Net income..................................        $ 93,536  $ 56,803   $ 52,476   $ 86,918   
                                                         ========  ========   ========   ========   
                                                                                                    
     Earnings per share..........................           $2.02     $1.22      $1.13      $1.46   
                                                         ========  ========   ========   ========    
</TABLE>

15.  Condensed unaudited pro forma financial information relating to Tempest
     Acquisition

The following pro forma information assumes the acquisition of Tempest occurred
at the beginning of each year presented. The pro forma financial information is
presented for informational purposes only and is not necessarily indicative of
the operating results that would have occurred had the Tempest Acquisition been
consummated at the beginning of each year presented, nor is it necessarily
indicative of future operating results.

                                                           1996        1995
                                                           ----        ----  
                                                        (in thousands, except
                                                           per share data)
Pro forma:
<TABLE>
<CAPTION>
 
<S>                                                      <C>         <C>      

     Net premiums earned..............................   $671,320    $580,850
     Investment income................................    225,331     213,068
     Net  income......................................    373,755     360,776
     Earnings per share...............................   $   6.23    $   5.96
</TABLE>

<PAGE>
 
EXHIBIT 21.1
 
                         SUBSIDIARIES OF THE REGISTRANT
 
<TABLE>
<CAPTION>
                                                        JURISDICTION
                                                             OF       PERCENTAGE
         NAME                                           ORGANIZATION  OWNERSHIP
         ----                                          -------------- ----------
<S>                                                    <C>            <C>
A.C.E. Insurance Company, Ltd.........................    Bermuda        100%
  Corporate Officers & Directors Assurance Ltd........    Bermuda        100
  ACE UK Limited...................................... United Kingdom    100
    ACE Capital Limited............................... United Kingdom    100
    Methuen Group Limited............................. United Kingdom    100
      Methuen Holdings Limited........................ United Kingdom    100
        Methuen Underwriting Ltd...................... United Kingdom    100
    ACE London Holdings Ltd........................... United Kingdom    100
      ACE Capital II Ltd.............................. United Kingdom    100
      ACE London Investments Ltd...................... United Kingdom    100
        ACE London Aviation Limited................... United Kingdom    100
        ACE London Underwriting Limited............... United Kingdom    100
      ACE Capital III Limited......................... United Kingdom    100
      ACE Staff Corporate Member Limited.............. United Kingdom    100
  ACE Reinsurance Company Europe Ltd..................    Ireland        100
    ACE Insurance Company Europe Ltd..................    Ireland        100
  Oasis Real Estate Co. Ltd...........................    Bermuda        100
    Scarborough Property Holdings, Ltd................    Bermuda         40
Tempest Reinsurance Company Limited...................    Bermuda        100
ACE Insurance Management Ltd..........................    Bermuda        100
ACE Services Ltd......................................     Cayman        100
Tripar Partnership....................................    Bermuda        100
ACE Realty Holdings Ltd...............................    Bermuda        100
Oasis Investments Limited.............................    Bermuda        100
</TABLE>
 
                                       37

<PAGE>
 
                                                                   EXHIBIT 23.1
 
                      CONSENT OF INDEPENDENT ACCOUNTANTS
 
  We consent to the incorporation by reference in this annual report on Form
10-K of our report dated November 5, 1997, on our audits of the consolidated
financial statements of ACE Limited as of September 30, 1997 and 1996 and for
each of the three years in the period ended September 30, 1997 from page 32 of
the 1997 Annual Report to Shareholders of ACE Limited.
 
                                          Coopers & Lybrand L.L.P.
 
New York, New York
December 22, 1997
 
                                      38

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 7
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-START>                             OCT-01-1996
<PERIOD-END>                               SEP-30-1997
<DEBT-HELD-FOR-SALE>                         3,290,336
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                     634,970
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                               4,368,429
<CASH>                                         106,336
<RECOVER-REINSURE>                                   0
<DEFERRED-ACQUISITION>                          27,018
<TOTAL-ASSETS>                               5,001,546
<POLICY-LOSSES>                              1,869,995
<UNEARNED-PREMIUMS>                            400,689
<POLICY-OTHER>                                  36,218
<POLICY-HOLDER-FUNDS>                                0
<NOTES-PAYABLE>                                      0
<COMMON>                                         6,911
                                0
                                          0
<OTHER-SE>                                   2,612,283
<TOTAL-LIABILITY-AND-EQUITY>                 5,001,546
                                     644,838
<INVESTMENT-INCOME>                            237,823
<INVESTMENT-GAINS>                             127,982
<OTHER-INCOME>                                       0
<BENEFITS>                                     435,941
<UNDERWRITING-AMORTIZATION>                     46,957
<UNDERWRITING-OTHER>                                 0
<INCOME-PRETAX>                                461,354
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            461,354
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   461,354
<EPS-PRIMARY>                                     8.02
<EPS-DILUTED>                                     7.96
<RESERVE-OPEN>                                       0
<PROVISION-CURRENT>                                  0
<PROVISION-PRIOR>                                    0
<PAYMENTS-CURRENT>                                   0
<PAYMENTS-PRIOR>                                     0
<RESERVE-CLOSE>                                      0
<CUMULATIVE-DEFICIENCY>                              0
        

</TABLE>

<PAGE>
 
                     TAXATION OF ACE AND ITS SHAREHOLDERS

     The following summary of (i) the taxation of ACE and its subsidiaries and
(ii) the taxation of ACE shareholders is based upon current law.  Legislative,
judicial or administrative changes may be forthcoming that could be retroactive
and could affect this summary. The tax treatment of any particular shareholder
may vary depending on such shareholder's particular tax situation or status. The
following summary is for general information only and does not purport to be a
complete analysis or listing of all tax considerations that might be applicable
to ACE and its subsidiaries or a holder of ACE Ordinary Shares, including
persons who may be
<PAGE>
 
subject to special tax rules (e.g. tax exempt entities or dealers in securities)
or shareholders who are not U.S. persons.  A U.S. person who holds ACE Ordinary 
Shares as capital assets will be referred to herein as a "U.S. ACE Shareholder."
Each prospective shareholder is urged to consult his or its own tax advisors as 
to the particular tax consequences to such shareholder of owning ACE Ordinary 
Shares.

Taxation of ACE and its Subsidiaries

     Bermuda.  CODA and ACE Insurance have received from the Minister of Finance
of Bermuda an assurance under The Exempted Undertakings Tax Protection Act, 1966
of Bermuda, to the effect that in the event of there being enacted in Bermuda
any legislation imposing tax computed on profits or income, or computed on any
capital asset, gain or appreciation, or any tax in the nature of estate duty or
inheritance tax, then the imposition of any such tax shall not be applicable to
CODA or ACE Insurance or to any of their operations or the shares, debentures or
other obligations of CODA or ACE Insurance until March 28, 2016.  This assurance
does not prevent the application of any such tax or duty to such persons as are
ordinarily resident in Bermuda, nor does it prevent the application of any tax
payable in accordance with the provisions of the Land Tax Act 1967 of Bermuda or
otherwise payable in relation to the property leased to CODA or ACE Insurance.
ACE, as a permit company under the Companies Act 1981 of Bermuda (the "Bermuda
Act"), has received similar assurances which are effective until March 28, 2016.
CODA and ACE Insurance, under current rates, pay annual Bermuda government and
business fees in the aggregate of BD$4,515 and BD$7,875, respectively.  ACE is
required to pay certain annual Bermuda government fees.  Under current rates, 
ACE pays a fixed annual fee of BD$1,680.  In addition, all entities employing
individuals in Bermuda are required to pay a payroll tax to the Bermuda
Government.  For the fiscal year ended September 30, 1996, ACE paid 
approximately $776,000 in payroll tax. Currently there is no Bermuda 
withholding tax on dividends paid by CODA or ACE Insurance.

     Cayman Islands.  Under current Cayman Islands law, ACE is not obligated to 
pay any taxes in the Cayman Islands on its income or gains.  ACE has received an
undertaking from the Governor-in-Council of the Cayman Islands pursuant to the 
provisions of the Tax Concessions Law, as amended, that until the year 2005 (i)
no subsequently enacted law imposing any tax on profits, income, gains or
appreciations shall apply to ACE and (ii) no such tax and no tax in the nature
of an estate duty or an inheritance tax shall be payable on any shares,
debentures or other obligations of ACE. The Cayman Islands currently imposes
stamp duties on certain categories of documents; however, the current operations
of ACE do not involve the payment of stamp duties in any material amount. The
Cayman Islands currently imposes an annual corporate fee upon all exempted
companies; at current rates ACE pays fees of approximately $1,750 per annum.

     United Kingdom.  Methuen is subject to United Kingdom corporation tax and 
value added tax.  ACE's corporate subsidiary which has acquired a 51% interest 
in Methuen and ACE's corporate subsidiary that is a Lloyd's corporate member 
participating in the Methuen syndicates are also subject to United Kingdom 
corporation tax and value added tax.  Although ACE has a representative office
in London, ACE has been advised that it is not deemed to be doing insurance
business in the United Kingdom and therefore is subject only to minimal tax in
the United Kingdom.

     United States.  Except as provided below with respect to ACE's corporate 
subsidiary that is a Lloyd's corporate member, ACE and its subsidiaries do not 
conduct business within the United States and thus are not subject to net income
tax imposed by the United States.  However, because definitive identification of
activities which constitute being engaged in a trade or business in the United 
States is not provided by the Code, regulations or court decisions, there can be
no assurance that the IRS will not contend successfully that ACE or one or more 
of its subsidiaries is engaged in a trade or business in the United States.  A 
foreign corporation deemed to be so engaged would be subject to U.S. income tax,
as well as the branch profits tax, on its income which is treated as effectively
connected with the conduct of that trade or business unless the corporation is 
entitled to relief under the permanent establishment provision of the Bermuda 
Treaty, as discussed below.  Such income tax, if imposed, would be based on 
effectively connected income computed in a manner generally analogous to that 
applied to the income of a domestic corporation, except that a foreign 
corporation can anticipate an allowance of deductions and credits only if it 
files a U.S. income tax return.  Under regulations, the foreign corporation 
would be entitled to deductions and credits only if the return is filed timely 
under rules set forth
<PAGE>
 
therein. ACE and its subsidiaries have in the past and expect to continue filing
protective tax returns to ensure that it and its subsidiaries would be entitled 
to deductions and credits if they are considered to be engaged in a U.S. trade 
or business. The highest federal tax rates currently are 35% for a corporation's
effectively connected income and 30% for the branch profits tax. The branch 
profits tax is imposed on effectively connected net income after subtracting the
regular corporate tax and making certain other adjustments and on interest paid 
or deemed paid from the U.S. branch to persons outside the United States. 
Pursuant to a Closing Agreement between Lloyd's and the IRS, ACE's corporate 
subsidiary that is a Lloyd's corporate member is treated as engaged in business 
in the United States and subject to net income tax in the United States on its 
U.S. source income.

     Under the Bermuda Treaty, CODA and ACE Insurance are subject to U.S. income
tax on any income found to be effectively connected with a U.S. trade or
business only if that trade or business is conducted through a permanent
establishment in the United States. No regulations interpreting the Bermuda
Treaty have been issued. While there can be no assurances, ACE does not believe
CODA or ACE Insurance has a permanent establishment in the United States.
Neither CODA nor ACE Insurance would be entitled to the benefits of the Bermuda
Treaty if (i) less than 50% of such subsidiary's stock were beneficially owned,
directly or indirectly, by Bermuda residents or U.S. citizens or residents, or
(ii) such subsidiary's income were used in substantial part to make
disproportionate distributions to, or to meet certain liabilities of, persons
who are not Bermuda residents or U.S. citizens or residents. While there can be
no assurances, ACE believes that no exception to Bermuda Treaty benefits will
apply after the Amalgamation.

     Foreign corporations not engaged in a trade or business in the United 
States are nonetheless subject to U.S. income tax on certain "fixed or 
determinable annual or periodic gains, profits and income" derived from sources 
within the United States as enumerated in Section 881(a) of the Code (such as 
dividends and certain interest on investments). The amount of such taxes paid by
ACE has not exceeded $1.7 million in any fiscal year.

     Effect of the Amalgamation. ACE believes that the Amalgamation will not 
cause ACE or its existing subsidiaries to be subject to tax in the Cayman 
Islands, Bermuda or the United States (except to the very limited extent noted 
above that they are currently subject to tax in those jurisdictions), and it is 
expected that the ACE Reinsurance Subsidiary will be taxed in a manner similar 
to ACE's other subsidiaries. Accordingly, the foregoing description of the tax 
treatment of ACE and its operating subsidiaries by Bermuda, the Cayman Islands, 
the United Kingdom and the United States should remain unchanged after the 
Effective Time and should, where applicable, apply equally to the ACE 
Reinsurance Subsidiary.

Taxation of ACE Shareholders

     Cayman Islands. Dividends paid by ACE are not subject to Cayman Islands 
withholding tax.

     Bermuda. Under current Bermuda law, there is no Bermuda income tax, 
withholding tax, capital gains tax, capital transfer tax, estate duty or 
inheritance tax payable by the respective shareholders of ACE with respect to an
investment in ACE Ordinary Shares.

     United States--Taxation of dividends. Subject to the discussion below 
relating to the potential application of the "controlled foreign corporation" 
and "passive foreign investment company" rules, cash distributions made with 
respect to ACE Ordinary Shares will constitute dividends for U.S. federal income
tax purposes to the extent paid out of current or accumulated E&P of ACE. U.S. 
ACE Shareholders generally will be subject to U.S. federal income tax on the 
receipt of such dividends. Generally, such dividends will not be eligible for 
the corporate dividends received deduction. To the extent that a distribution 
exceeds E&P, it will be treated first as a return of the U.S. ACE Shareholder's 
basis to the extent thereof, and then as gain from the sale of a capital asset.

     United States--Classification as a controlled foreign corporation. Under 
Section 951(a) of the Code, each "U.S. 10% shareholder" (as defined below) that,
on the last day of foreign corporation's taxable year, owns, directly or 
indirectly through a foreign entity, shares of a foreign corporation that is a 
"controlled foreign


                                                                              6/
<PAGE>
 
corporation" ("CFC") for an uninterrupted period of 30 days or more during any 
taxable year must include in its gross income for U.S. federal income tax 
purposes its pro rata share of the CFC's "subpart F income" for such year, even 
if the subpart F income is not distributed. In addition, the U.S. 10% 
shareholders of a CFC may be deemed to receive taxable distributions to the 
extent the CFC increases the amount of its earnings that are invested in certain
specified types of U.S. property or if the CFC holds "excess passive assets," as
defined in Section 956A of the Code. "Subpart F income" includes, inter alia, 
(i) "foreign personal holding company income", such as interest, dividends, and 
other types of passive investment income and (ii) "insurance income," which is 
defined to include any income (including underwriting and investment income) 
that is attributable to the issuing (or reinsuring) of any insurance or annuity 
contract in connection with property in, liability arising out of activity in, 
or in connection with the lives or health of residents of, a country other than 
the country under the laws of which the CFC is created or organized, and which 
(subject to certain modifications) would be taxed under the insurance company 
provision of the Code if such income were the income of a domestic insurance 
company ("Subpart F Insurance Income"). However, Subpart F income does not 
include any income from sources within the U.S. which is effectively connected 
with the conduct of a trade or business within the U.S. and not exempted or 
subject to a reduced rate of tax by applicable treaty. Therefore, all of ACE's 
income, and all income of ACE's operating subsidiaries that is not attributable 
to a permanent establishment in the U.S., is expected to be Subpart F income.

     Under Section 951(b) of the Code, any U.S. Person who owns, directly or 
indirectly through foreign entities, or is considered to own (by application of 
the rules of constructive ownership set forth in Code Section 958(b), generally 
applying to family members, partnerships, estates, trusts or 10% controlled 
corporations) 10% or more of the total combined voting power of all classes of 
stock of a foreign corporation will be considered to be a "U.S. 10% 
shareholder." In general, a foreign corporation is treated as a CFC only if its 
U.S. 10% shareholders collectively own more than 50% of the total combined 
voting power or total value of the corporation's stock on any day (the "50% 
Test"). However, for purposes only of taking into account Subpart F Insurance 
Income, a foreign corporation will be treated as a CFC if (i) more than 25% of 
the total combined voting power or total value of its stock is owned by U.S. 10%
shareholders and (ii) the gross amount of premiums or other consideration in 
respect of risks outside its country of incorporation exceeds 75% of the gross 
amount of all premiums or other consideration in respect of all risks (the "25% 
Test"). It is anticipated that the gross premiums of each of the insurance 
subsidiaries of ACE in respect of Subpart F Insurance Income will exceed 75% of 
its gross premiums in respect of all risks so that the 25% Test, rather than the
50% Test, will be applicable with respect to its Subpart F Insurance Income. 
However, the 50% test will continue to apply to ACE itself.

     After the Amalgamation, all the capital stock of ACE Insurance, CODA, and 
the ACE Reinsurance Subsidiary will be owned directly or indirectly by ACE. In 
determining the U.S. 10% shareholders of ACE Insurance, CODA, or the ACE 
Reinsurance Subsidiary, U.S. Persons who are shareholders of ACE are considered 
as owning proportionately the stock of ACE Insurance, CODA, and the ACE 
Reinsurance Subsidiary. After the Amalgamation, U.S. Persons who own, directly, 
indirectly or by attribution under the rules of Section 958(b) of the Code, more
than 10% in value of the stock of ACE will not own more than 25% of the total 
combined voting power or value of the stock of ACE. As a result, none of ACE 
Insurance, CODA, or the ACE Reinsurance Subsidiary, will be a CFC under the 25% 
Test. However, depending on the future ownership of ACE stock, any U.S. Person 
who subsequently acquires 10% or more of the stock of ACE may be required to 
include their share of the Subpart F income of ACE and its subsidiaries in their
U.S. taxable income. It is not expected that ACE itself would ever be a CFC 
under the 50% test, so U.S. persons are not expected to have to include any of 
ACE's Subpart F income in their U.S. taxable income.

     United States--RPII companies. A different definition of "controlled 
foreign corporation" is applicable in the case of a foreign corporation which 
earns related person insurance income ("RPII"). RPII is defined in Code Section 
953(c)(2) as any "insurance income" (as defined above) attributable to policies 
of insurance or reinsurance with respect to which the person (directly or 
indirectly) insured is a "U.S. shareholder" of the foreign corporation or a 
"related person" to such a shareholder. For purposes only of taking into account
RPII, and subject to the exceptions described below, an insurance subsidiary of 
ACE will be treated as a CFC it its


                                                                              7/

<PAGE>
 
"RPII shareholders" (as defined below) collectively own, directly, indirectly, 
or by attribution under Code Section 958(b), 25% or more of the total combined 
voting power or value of such subsidiary's stock on any day during a fiscal 
year. If an insurance subsidiary of ACE is a CFC under the special RPII rules 
for an uninterrupted period of at least 30 days during any fiscal year, a U.S. 
Person who owns, directly or indirectly through foreign entities, shares of 
shares of such subsidiary on the last day of such fiscal year must include in 
its gross income for U.S. federal income tax purposes its allocable share of 
RPII for the entire taxable year, subject to certain modifications. For purposes
of inclusion of RPII from an insurance subsidiary of ACE in the income of U.S. 
Persons who own ACE Ordinary Shares, unless an exception applies, the term "RPII
shareholder" includes all U.S. Persons who own, directly or indirectly through 
foreign entities, any amount (rather than 10% or more) of the ACE Ordinary 
Shares. Generally, the term "related person" for purposes of the RPII rules 
means someone who controls or is controlled by the RPII shareholder or someone 
who is controlled by the same person or persons which control the RPII 
shareholder. Control is measured by either more than 50% in value or more than 
50% in voting power of stock, with respect to corporations, or more than 50% of 
the beneficial interests, with respect to partnerships, trusts, or estates, 
applying constructive ownership principles similar to the rules of Section 958 
of the Code. The term "related persons" also includes, with respect to insurance
policies covering liability arising from services performed as a director, 
officer or employee of a corporation or a partner or employee of a partnership,
the person performing such services and the entity for which the services are
performed.

     The above RPII rules do not apply if (A) direct and indirect insureds and 
persons related to such insureds, whether or not U.S. persons, are treated as 
owning less than 20% of the voting power and less than 20% of the value of the 
stock of ACE's insurance company subsidiaries, or (B) the RPII of each of ACE's 
insurance subsidiaries, determined on a gross basis, is less than 20% of each 
such subsidiary's gross insurance income for the taxable year. ACE believes that
the RPII income of each of ACE Insurance and CODA has been, and should be for 
the foreseeable future, less than 20% of such subsidiary's gross insurance 
income for the taxable year and, based in part on information provided by 
Tempest, it is expected that the ACE Reinsurance Subsidiary's RPII income will 
constitute less than 20% of its gross insurance income for future taxable years.
As a consequence, the special RPII rules should not apply, and U.S. Persons 
owning ACE Ordinary Shares should not be required to include in gross income any
RPII income under the special RPII rules. The IRS may assert, however, that 
ACE's reinsurance subsidiaries indirectly reinsure shareholders of ACE. ACE does
not expect any of its subsidiaries to enter into reinsurance arrangements where 
the ultimate risk insured is that of a holder of ACE Ordinary Shares that is a 
U.S. person or person related to such a U.S. person at a level which would cause
any subsidiary to have RPII income of 20% or more of its gross insurance income.
However, unless final Treasury Regulations under Code Section 953 provide that 
this rule would apply only if the reinsured entity is fronting for another 
party, it may be difficult for ACE to obtain and, if requested of ACE or a 
shareholder by the IRS, provide shareholders with enough information to document
and be certain that each of ACE's subsidiaries providing significant reinsurance
have satisfied the 20% test. ACE believes that it is unlikely that enough of the
underlying reinsured parties will own sufficient ACE Ordinary Shares to cause 
the RPII income of any of ACE's subsidiaries to be 20% or more of their gross 
insurance income and ACE will endeavor to avoid failing the 20% test. However, 
the ultimate application of the RPII rules and the proof that will be required 
to establish compliance thereunder is uncertain and each prospective investor 
should consult their own tax advisor with respect to this issue.

     United States--Passive foreign investment companies. Code Sections 1291 
through 1297 contain special rules applicable to foreign corporations that are 
"passive foreign investment companies" ("PFIC's"). In general, a foreign 
corporation will be a PFIC if 75% or more of its gross income constitutes 
"passive income" (the "75% Income Test") or 50% or more of its assets produce, 
or are held for the production of, passive income (the "50% Asset Test"). If ACE
were to be characterized as a PFIC, its U.S. shareholders would have to make an 
election (a "QEF Election") to be taxable currently on their pro-rata shares of 
earnings of ACE whether or not such earnings were distributed or they would be 
subject to a special tax and an interest charge at the time of the sale of, or 
receipt of an "excess distribution" with respect to, their shares, and a portion
of any gain may be recharacterized as ordinary income, which for an individual 
would be taxed at the highest marginal rate of 39.6%.


                                                                              8/
<PAGE>
 
In general, a shareholder receives an "excess distribution" if the amount of the
distribution is more than 125% of the average distribution with respect to the
stock during the three preceding taxable years (or shorter period during which
the taxpayer held the stock). In general, the special tax and interest charges
are based on the value of the tax deferral of the taxes that are deemed due
during the period the U.S. shareholder owned the shares, computed by assuming
that the excess distribution or gain (in the case of a sale) with respect to the
shares was taxed in equal portions throughout the holder's period of ownership
at the highest marginal tax rate. The interest charge is computed using the
applicable rate imposed on underpayments of U.S. federal income tax for such
period. In general, if a U.S. Person owns stock in a foreign corporation during
any taxable year in which such corporation is a PFIC and such shareholder does
not make a QEF Election, the stock will be treated as stock in a PFIC for all
subsequent years.

     For the above purposes, "passive income" is defined to include income of a
kind that would be characterized as foreign personal holding company income
under Code Section 954(c), and generally includes interest, dividends, annuities
and other investment income. The PFIC statutory provisions contain and express
exception for income "derived in the active conduct of an insurance business by
a corporation which is predominantly engaged in an insurance business . . ."
"This exception is intended to ensure that income derived by a bona fide
insurance company is not treated as passive income. Thus, to the extent such
income is attributable to financial reserves in excess of the reasonable needs
of the insurance business, it may be treated as passive income for purposes of
the PFIC rules. The PFIC statutory provisions also contain a look-through rule
that states that, for purposes of determining whether a foreign corporation is a
PFIC, such foreign corporation shall be treated as if it "received directly its
proportionate share of the income . . . "and as if it "held its proportionate
share of the assets . . ." of any other corporation in which it owns at least
25% of the value of the stock.

     In ACE's view each of its direct and indirect insurance subsidiaries
(including the ACE Reinsurance Subsidiary, after the Effective Time) is
predominantly engaged in an insurance business and does not have financial
reserves in excess of the reasonable needs of its insurance business. Under the
look-through rule, ACE would be deemed to own its proportionate share of the
assets and to have received its proportionate share of the income of ACE
Insurance, CODA, and the ACE Reinsurance Subsidiary for purposes of the 75%
Income and 50% Assets Test. However, no regulations interpreting the substantive
PFIC provisions have yet been issued. Therefore, substantial uncertainty exists
with respect to their application or their possible retroactivity. Each U.S.
Person who holds ACE Ordinary Shares should consult his tax advisor as to the
possible effects of these rules.

     Information Reporting. Every U.S. Person who "controls" a foreign
corporation by owning directly or by attribution more than 50% of the total
value of shares of all classes of stock of such corporation, for an
uninterrupted period of 30 days or more during a fiscal year of that
corporation, must file IRS Form 5471 with its U.S. income tax return. However,
the IRS has the authority to, and does require, any U.S. Person treated as a
U.S. 10% shareholder or RPII shareholder of a CFC that owns shares directly or
indirectly through a foreign entity to file a Form 5471. In addition, U.S.
Persons who own more than 5% in value of the outstanding stock of ACE or its
subsidiaries at any time during a taxable year are required in certain
circumstances to file Form 5471 even if neither corporation is a CFC. A tax- 
exempt organization that is treated as a U.S. 10% shareholder or a RPII
shareholder for any purpose under subpart F will be required to file a Form 5471
in the circumstances described above. Failure to file Form 5471 may result in
penalties.

     Dispositions of ACE Ordinary Shares. Subject to the discussion elsewhere
relating to the potential application of the CFC and PFIC rules, gain or loss
realized by a U.S. ACE Shareholder on the sale, exchange or other disposition of
ACE Ordinary Shares will be includible in gross income as capital gain or loss
in an amount equal to the difference between such holder's basis in the ACE
Ordinary Shares and the amount realized on the sale, exchange or other
disposition. If a U.S. ACE Shareholder's holding period for the ACE Ordinary
Shares is more than one year, any gain will be subject to the U.S. federal
income tax at a current maximum marginal rate of 28% for individuals and 35% for
corporations.

<PAGE>
 
earnings and profits during the period that the shareholder held the shares
(with certain adjustments). Code Section 953(c)(7) generally provides that
Section 1248 also will apply to the sale or exchange of shares by a U.S.
shareholder in a foreign corporation that earns RPII and is characterized as a
CFC under the RPII rules if the foreign corporation would be taxed as an
insurance company if it were a domestic corporation, regardless of whether the
shareholder is a 10% shareholder or whether RPII constitutes 20% or more of the
corporation's gross insurance income.

     ACE believes, based on the advice of counsel, that Code Section 1248 will
not apply to dispositions of ACE Ordinary Shares, so long as ACE is not a CFC,
because ACE is not directly engaged in the insurance business. There can be no
assurance, however, that the IRS will interpret proposed regulations under Code
Section 953 in this manner or that the Treasury Department will not amend the
proposed regulations under Section 953 or other regulations to provide that
Section 1248 will apply to dispositions of shares in a corporation such as ACE
which is engaged in the insurance business directly on indirectly through its
subsidiaries. If the IRS or Treasury Department were to take such action ACE
would notify shareholders that Code Section 1248 will apply to dispositions of
Common Shares.

     Foreign Tax Credit.  Because it is anticipated that U.S. Persons will own a
majority of ACE's shares after the Amalgamation and because a substantial part
of the insurance business of ACE's subsidiaries includes the insurance of U.S.
risks only a portion of the RPII and Subpart F inclusions (if any) and dividends
paid by ACE (including any gain from the sale of ACE Ordinary Shares that is
treated as a dividend under Code Section 1248) will be treated as foreign source
income for purposes of computing a shareholder's U.S. foreign tax credit
limitation.  Except in the case of U.S. 10% shareholders it is likely that all
of the RPII and Subpart F inclusions (if any) and dividends that are foreign
source income will constitute either "passive" or "financial services" income
for foreign tax credit limitation purposes. Thus, it may not be possible for
certain U.S. shareholders to utilize excess foreign tax credits to reduce U.S.
tax on such income.

     Other.  Dividends paid by ACE to U.S. corporate shareholders will not be
eligible for the dividends received deduction provided by Code Section 243.

     Except as discussed below with respect to backup withholding, dividends
paid by ACE will not be subject to a U.S. withholding, tax.

     Information reporting to the IRS by paying agents and custodians located in
the U.S. will be required with respect to payments of dividends (if any) on the
ACE Ordinary Shares to U.S. Persons or to paying agents or custodians located in
the U.S. In addition, a holder of ACE Ordinary Shares may be subject to backup
withholding at the rate of 31% with respect to dividends paid by such persons,
unless such holder (a) is a corporation or comes within certain other exempt
categories and, when required, demonstrates this fact; or (b) provides a
taxpayer identification number, certifies as to no loss of exemption from backup
withholding and otherwise complies with applicable requirements of the backup
withholding rules. The backup withholding tax is not an additional tax and may
be credited against a holder's regular Federal income tax liability.

     Sales of ACE Ordinary Shares through brokers by certain U.S. Persons also
may be subject to backup withholding. Sales by corporations, certain tax-exempt
entities, individual retirement plans, REITs, certain financial institutions,
and other "exempt recipients" as defined in applicable Treasury regulations
currently are not subject to backup withholding.  Holders of ACE Ordinary Shares
should consult their own tax advisors regarding the possible applicability of
the backup withholding rules to sales of their ACE Ordinary Shares.

     The foregoing discussion (including and subject to the matters and 
qualifications set forth in such summary) is based on current law and is for 
general information only.  The tax treatment of a holder of ACE Ordinary Shares 
for U.S. federal income, state, local or non-U.S. tax purposes may vary 
depending on the holder's particular tax situation.  Legislative, judicial or 
administrative changes or interpretations may be forthcoming that could be 
retroactive and could affect the tax consequences to holders of ACE Ordinary 
Shares.  PROSPECTIVE INVESTORS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS 
CONCERNING THE FEDERAL, STATE, LOCAL AND NON-U.S. TAX CONSEQUENCES TO THEM OF 
OWNING THE ACE ORDINARY SHARES.


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