SERIES SUPPLEMENT

                       CORPORATE BACKED TRUST CERTIFICATES

                              SERIES 2001-23 TRUST

                                     between

                             LEHMAN ABS CORPORATION,

                                  as Depositor

                                       and

                      U.S. BANK TRUST NATIONAL ASSOCIATION,

                                   as Trustee

                       CORPORATE BACKED TRUST CERTIFICATES

                            Dated as of June 1, 2001

                              (RYDER SYSTEM, INC.)


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                                TABLE OF CONTENTS

                                                                           Page


Section 1.    Incorporation of Standard Terms................................1

Section 2.    Definitions....................................................1

Section 3.    Designation of Trust and Certificates..........................7

Section 4.    Trust Certificates.............................................8

Section 5.    Distributions..................................................9

Section 6.    Trustee's Fees................................................10

Section 7.    Optional Exchange; Optional Call..............................11

Section 8.    Notices of Events of Default..................................13

Section 9.    Miscellaneous.................................................13

Section 10.   Governing Law.................................................16

Section 11.   Counterparts..................................................16

Section 12.   Termination of the Trust......................................16

Section 2.    Sale of Underlying Securities.................................16

Section 13.   Amendments....................................................17

Section 14.   Voting of Underlying Securities, Modification of Indenture....17



SCHEDULE I SERIES 2001-23 UNDERLYING SECURITIES SCHEDULE
SCHEDULE II CLASS A-2 CERTIFICATE CALL SCHEDULE
EXHIBIT A-1 FORM OF TRUST CERTIFICATE CLASS A-1
EXHIBIT A-2 FORM OF TRUST CERTIFICATE CLASS A-2
EXHIBIT B-1 FORM OF CLASS A-1 CALL WARRANT
EXHIBIT B-2 FORM OF CLASS A-2 CALL WARRANT
EXHIBIT C FORM OF WARRANT AGENT AGREEMENT
EXHIBIT D FORM OF INVESTMENT LETTER


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<PAGE>

                                SERIES SUPPLEMENT

                       CORPORATE BACKED TRUST CERTIFICATES

                              Series 2001-23 TRUST

         SERIES SUPPLEMENT, Series 2001-23, dated as of June 1, 2001 (the
"Series Supplement"), by and between LEHMAN ABS CORPORATION, as Depositor (the
"Depositor"), and U.S. BANK TRUST NATIONAL ASSOCIATION, as Trustee (the
"Trustee").

                              W I T N E S S E T H:

         WHEREAS, the Depositor desires to create the Trust designated herein
(the "Trust") by executing and delivering this Series Supplement, which shall
incorporate the terms of the Standard Terms for Trust Agreements, dated as of
January 16, 2001 (the "Standard Terms"; together with this Series Supplement,
the "Trust Agreement"), by and between the Depositor and the Trustee, as
modified by this Series Supplement;

         WHEREAS, the Depositor desires to deposit the Underlying Securities set
forth on Schedule I attached hereto (the "Underlying Securities Schedule") into
the Trust;

         WHEREAS, in connection with the creation of the Trust and the deposit
therein of the Underlying Securities, it is desired to provide for the issuance
of trust certificates (the "Certificates") evidencing undivided interests in the
Trust; and

         WHEREAS, the Trustee has joined in the execution of the Standard Terms
and this Series Supplement to evidence the acceptance by the Trustee of the
Trust;

         NOW, THEREFORE, in consideration of the foregoing premises and the
mutual covenants expressed herein, it is hereby agreed by and between the
Depositor and the Trustee as follows:

         Section 1. Incorporation of Standard Terms. Except as otherwise
provided herein, all of the provisions of the Standard Terms are hereby
incorporated herein by reference in their entirety, and this Series Supplement
and the Standard Terms shall form a single agreement between the parties. In the
event of any inconsistency between the provisions of this Series Supplement and
the provisions of the Standard Terms, the provisions of this Series Supplement
will control with respect to the Series 2001-23 Certificates and the
transactions described herein.

         Section 2. Definitions. (a) Except as otherwise specified herein or as
the context may otherwise require, the following terms shall have the respective
meanings set forth below for all purposes under this Series Supplement. (Section
2(b) below sets forth terms listed in the Standard Terms which are not
applicable to this Series.) Capitalized terms used but not defined herein shall
have the meanings assigned to them in the Standard Terms.



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<PAGE>

                  "Accreted Principal Amount" for the Class A-2 Certificates
means for each six-month period from and including each date specified in
Schedule II hereof to but excluding the next such date, the amount specified in
Schedule II as the "Ending Balance" for such beginning date.

                  "Available Funds" shall have the meaning specified in the
Standard Terms, except that investment income earned on funds invested pursuant
to Section 3.05 of the Standard Terms shall be included in Available Funds, as
well as any redemption premium and reinvestment proceeds on amounts paid in
respect of the Underlying Securities.

                  "Business Day" shall mean any day other than (i) Saturday and
Sunday or (ii) a day on which banking institutions in New York City, New York
are authorized or obligated by law or executive order to be closed for business
or (iii) a day that is not a business day for the purposes of the Indenture.

                  "Call Date" shall mean any Business Day occurring on or after
June 1, 2006, or after the announcement of any redemption or other unscheduled
payment of the Underlying Securities on which the Call Warrants are exercised
and the proceeds of an Optional Call are distributed to holders of the
Certificates pursuant to Section 7 hereof.

                  "Call Notice" shall have the meaning specified in Section 1.1
of the Warrant Agent Agreement.

                  "Call Price" shall mean, for each related Call Date, (i) in
the case of the Class A-1 Certificates, the principal amount of the Class A-1
Certificates to be purchased by the Warrant Holder on such date, plus any
accrued and unpaid interest on such amount to but excluding the Call Date and
(ii) in the case of the Class A-2 Certificates, the Accreted Principal Amount of
the Class A-2 Certificates to be purchased by the Warrant Holder on such date.

                  "Call Warrants" shall mean the rights to purchase in whole or
in part at the Call Price the Certificates, and thereby cause an Optional Call
of the Certificates on any Call Date pursuant to the Optional Call provisions of
Section 7 hereof.

                  "Certificate Account" shall have the meaning specified in the
Standard Terms.

                  "Certificates" shall have the meaning specified in Section 3
hereof.

                  "Class A-1 Certificates" shall mean the Certificates, in the
form attached hereto as Exhibit A-1, to be issued by the Trust representing a
proportionate undivided beneficial ownership interest in certain distributions
to be made by the Trust and having the characteristics described herein and in
the Certificates.



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<PAGE>

                  "Class A-2 Certificates" shall mean the Certificates, in the
form attached hereto as Exhibit A-2, to be issued by the Trust representing a
proportionate undivided beneficial ownership interest in certain distributions
to be made by the Trust and having the characteristics described herein and in
the Certificates.

                  "Closing Date" shall mean June 1, 2001.

                  "Collection Period" shall mean, (i) with respect to each
December Distribution Date, the period beginning on the day after the June
Distribution Date and ending on such December Distribution Date, inclusive and,
(ii) with respect to each June Distribution Date, the period beginning on the
day after the December Distribution Date of a given year and ending on the June
Distribution Date of the following year, inclusive; provided, however, that
clauses (i) and (ii) shall be subject to Section 9(f) hereof.

                  "Corporate Trust Office" shall mean the office of U.S. Bank
Trust National Association located at 100 Wall Street, New York, New York 10005.

                  "Currency" shall mean United States Dollars.

                  "Depository" shall mean The Depository Trust Company.

                  "Distribution Date" shall mean June 1 and December 1 of each
year (or if such date is not a Business Day, the next succeeding Business Day),
commencing on December 1, 2001 and ending on the Final Scheduled Distribution
Date.

                  "Eligible Account" shall have the meaning specified in the
Standard Terms.

                  "Eligible Investments" shall be as defined in the Standard
Terms; provided, however, that (i) the minimum required rating for long-term
instruments will be equal to the rating of the Underlying Securities, and (ii)
the rating of any short-term instruments will be A-1+ by S&P and P1 by Moody's;
and provided, further, that any such investment matures no later than the
Business Day prior to any related Distribution Date and that any such investment
be denominated in U.S. dollars.

                  "Event of Default" shall mean (i) a default in the payment of
any interest on any Underlying Security after the same becomes due and payable
(subject to any applicable grace period), (ii) a default in the payment of the
principal of or any installment of principal of any Underlying Security when the
same becomes due and payable and (iii) any other event specified as an "Event of
Default" in the Indenture for the Underlying Securities.

                  "Extraordinary Trust Expenses" shall have the meaning
specified in the Standard Terms.

                  "Final Scheduled Distribution Date" shall mean December 1,
2025.



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<PAGE>

                  "Indenture" shall mean the indenture pursuant to which the
Underlying Securities were issued.

                  "Interest Accrual Period" shall mean for any Distribution
Date, the period from and including the preceding Distribution Date (or in the
case of the first Interest Accrual Period, from and including June 1, 2001) to
but excluding the current Distribution Date.

                  "Liquidation Price" shall mean the price at which the Trustee
sells the Underlying Securities.

                  "Liquidation Proceeds" shall have the meaning specified in the
Standard Terms.

                  "Maturity Date" shall have the meaning specified in Schedule I
hereto.

                  "Moody's" shall mean Moody's Investors Service, Inc.

                  "Optional Call" shall mean the call of the Certificates by the
Warrant Holder, in whole or in part, resulting from the exercise of Call
Warrants by the Warrant Holder, pursuant to Section 7(b) hereof.

                  "Optional Exchange" shall mean the exchange of the
Certificates by the Trust for the Underlying Securities, pursuant to Section
7(a) hereof.

                  "Optional Exchange Date" shall mean any Distribution Date on
which Underlying Securities subject to Optional Exchange are distributed to a
Certificateholder.

                  "Ordinary Expenses" shall mean the Trustee's ordinary expenses
and overhead in connection with its services as Trustee, including the items
referred to in the definition of Ordinary Expenses in the Standard Terms.

                  "Prepaid Ordinary Expenses" shall be zero for this Series.

                  "Prospectus Supplement" shall mean the Prospectus Supplement,
dated May 22, 2001, relating to the Certificates.

                  "Rating Agency" shall mean Moody's and S&P.

                  "Rating Agency Condition" shall have the meaning specified in
the Standard Terms.

                  "Record Date" shall mean, with respect to each Distribution
Date, the day immediately preceding the related Distribution Date.

                  "Required Interest" shall have the meaning specified in the
Standard Terms.



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<PAGE>

                  "Required Percentage-Amendment" shall be 66-2/3% of the
aggregate Voting Rights.

                  "Required Percentage-Direction of Trustee" shall be 66-2/3% of
the aggregate Voting Rights.

                  "Required Percentage-Remedies" shall be 66-2/3% of the
aggregate Voting Rights.

                  "Required Percentage-Removal" shall be 66-2/3% of the
aggregate Voting Rights.

                  "Required Rating" shall mean, in the case of Moody's, the
rating assigned to the Underlying Securities by Moody's as of the Closing Date,
and, in the case of S&P, the rating assigned to the Underlying Securities by S&P
as of the Closing Date.

                  "S&P" shall mean Standard & Poor's Ratings Services, a
division of The McGraw Hill Companies Inc.

                  "Series" shall mean Series 2001-23.

                  "Trustee Fee" shall mean the amount paid to the Trustee by the
Depositor on the Closing Date.

                  "Trust Property" shall mean the Underlying Securities
described on Schedule I hereto and the Certificate Account.

                  "Underlying Securities" shall mean $28,777,000 aggregate
principal amount of 6.95% Debentures due 2025 issued by the Underlying
Securities Issuer (as set forth on Schedule I attached hereto) on the Closing
Date and any additional Underlying Securities transferred to the Trust after the
Closing Date.

                  "Underlying Securities Issuer" shall mean Ryder System, Inc.
and any successor in respect of the Underlying Securities.

                  "Underlying Securities Trustee" shall mean The Chase Manhattan
Bank.

                  "Underwriters" shall mean Lehman Brothers Inc., an affiliate
of the Depositor, Prudential Securities Incorporated and First Union Securities,
Inc.

                  "Voting Rights" shall, in the entirety, be allocated among all
Class A-1 Certificateholders and Class A-2 Certificateholders in proportion to
the then unpaid principal amounts of their respective Certificates.

                  "Warrant Agent" shall mean initially, U.S. Bank Trust National
Association.



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                  "Warrant Agent Agreement" shall mean that certain Warrant
Agent Agreement (in the form attached hereto as Exhibit C), dated as of the date
hereof, between the Depositor and U.S. Bank Trust National Association, as
Warrant Agent and as Trustee, as the same may be amended from time to time.

         (b) The terms listed below are not applicable to this Series.

         "Accounting Date"

         "Administrative Fees"

         "Advance"

         "Allowable Expense Amounts"

         "Basic Documents"

         "Calculation Agent"

         "Call Premium Percentage"

         "Credit Support"

         "Credit Support Instrument"

         "Credit Support Provider"

         "Cut-off Date"

         "Eligible Expense"

         "Exchange Rate Agent"

         "Fixed Pass-Through Rate"

         "Floating Pass-Through Rate"

         "Guaranteed Investment Contract"

         "Letter of Credit"

         "Limited Guarantor"

         "Limited Guaranty"
         "Minimum Wire Denomination"

         "Notional Amount"



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         "Pass-Through Rate"

         "Place of Distribution"

         "Purchase Price"

         "Required Premium"

         "Required Principal"

         "Requisite Reserve Amount"

         "Retained Interest"

         "Sale Procedures"

         "Sub-Administration Account"

         "Sub-Administration Agreement"

         "Sub-Administration Agent"

         "Surety Bond"

         "Swap Agreement"

         "Swap Counterparty"

         "Swap Distribution Amount"

         "Swap Guarantee"

         "Swap Guarantor"

         "Swap Receipt Amount"

         "Swap Termination Payment"

         Section 3. Designation of Trust and Certificates. The Trust created
hereby shall be known as the "Corporate Backed Trust Certificates, Series
2001-23 Trust." The Certificates evidencing certain undivided ownership
interests therein shall be known as "Corporate Backed Trust Certificates, Series
2001-23." The Certificates shall consist of the Class A-1 Certificates and Class
A-2 Certificates (together, the "Certificates"). The Trust is also issuing call
warrants with respect to the Certificates ("Call Warrants").

         (a) The Certificates shall be held through the Depository in book-entry
form and shall be substantially in the forms attached hereto as Exhibits A-1 and
A-2. The Class A-1 Certificates shall be issued in denominations of $25. The
Class A-2 Certificates shall be issued in minimum denominations of $500,000 and


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in integral multiples of $1,000 in excess thereof. Except as provided in the
Standard Terms and in paragraph (c) of this Section, the Trust shall not issue
additional Certificates or incur any indebtedness.

         (b) The Class A-1 Certificates have an initial aggregate certificate
principal amount ("Certificate Principal Amount") of $25,000,000 and the Class
A-2 Certificates have an initial aggregate Certificate Principal Amount of
$3,777,000. The holders of the Class A-1 Certificates will be entitled to
receive on each Distribution Date the interest, if any, received on the
Underlying Securities to the extent necessary to pay interest at a rate of 8.00%
per annum on the outstanding Certificate Principal Amount of the Class A-1
Certificates. The Class A-2 Certificates shall not bear interest.

         (c) The Depositor may sell to the Trustee additional Underlying
Securities on any date hereafter upon at least 3 Business Days (or such lesser
period as may be agreed by the parties hereto) notice to the Trustee and upon
(i) satisfaction of the Rating Agency Condition and (ii) delivery of an Opinion
of Counsel to the effect that the sale of such additional Underlying Securities
will not materially increase the likelihood that the Trust would fail to qualify
as a grantor trust under the Code. Upon such sale to the Trustee, the Trustee
shall deposit such additional Underlying Securities in the Certificate Account,
and shall authenticate and deliver to the Depositor, on its order, Class A-1
Certificates and Class A-2 Certificates in the same proportion as the original
Class A-1 Certificates and Class A-2 Certificates bear to the initial Underlying
Securities, as well as the Call Warrants related thereto. Any such additional
Class A-1 Certificates and Class A-2 Certificates authenticated and delivered
shall have the same terms and rank pari passu with the original Class A-1
Certificates and Class A-2 Certificates, respectively, issued in accordance with
this Series Supplement.

         (d) As a condition precedent for transferring the Call Warrants, the
prospective transferee shall be required to deliver to the Trustee and the
Depositor, an executed copy of the Investment Letter (set forth as Exhibit D
hereto).

         Section 4. Trust Certificates. The Trustee hereby acknowledges receipt,
on or prior to the Closing Date, of:

                  (i) the Underlying Securities set forth on the Underlying
Securities Schedule; and

                  (ii) all documents required to be delivered to the Trustee
pursuant to Section 2.01 of the Standard Terms.

         Section 5. Distributions. (a) On each applicable Distribution Date, the
Trustee shall apply Available Funds in the Certificate Account as follows, in
the following order of priority:

         (i) the Trustee will pay the interest portion of Available Funds with
respect to the Underlying Securities:



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                  (a) first, to the Trustee, as reimbursement for any
Extraordinary Trust Expenses incurred by the Trustee with respect to the
Underlying Securities in accordance with Section 6(b) below and approved by 100%
of the Certificateholders;

                  (b) second, to the holders of the Class A-1 Certificates,
interest at the rate of 8.00% per annum on the principal amount of the Class A-1
Certificates; and

                  (c) third, to the Depositor, any remainder.

         (ii) the Trustee will pay the principal portion of Available Funds with
respect to the Underlying Securities:

                  (a) first, to the Trustee, as reimbursement for any remaining
Extraordinary Trust Expenses incurred by the Trustee with respect to the
Underlying Securities in accordance with Section 6(b) below and approved by 100%
of the Certificateholders; and

                  (b) second, to the holders of the Class A-1 Certificates and
Class A-2 Certificates, the remaining principal portion of Available Funds pro
rata in the proportion that the outstanding principal amount of the Class A-1
Certificates bears to the outstanding principal amount of the Class A-2
Certificates.

         (b) Notwithstanding any other provision hereof, amounts recovered in
respect of the Underlying Securities prior to the Final Scheduled Distribution
Date following (i) an acceleration of the date of maturity of the Underlying
Securities, (ii) the redemption or other prepayment of the Underlying Securities
by the Underlying Securities Issuer or (iii) the sale of the Underlying
Securities by the Trust, shall be distributed pursuant to the priorities
specified in Section 5(a) hereof. The Certificates shall be subject to a
mandatory redemption on any Distribution Date on which the Underlying Securities
are redeemed by the Underlying Securities Issuer.

         (c) Unless otherwise instructed by holders of Certificates representing
a majority of the Voting Rights within thirty (30) days after the Trustee gives
notice pursuant to Section 8 hereof, the Trustee will sell the Underlying
Securities pursuant to Section 13 hereof and deposit the Liquidation Proceeds,
if any, into the Certificate Account for distribution not later than two (2)
Business Days after the receipt of immediately available funds in accordance
with Section 5(a) hereof.

         (d) In the event that the Trustee receives non-cash property in respect
of the Underlying Securities as a result of a payment default on the Underlying
Securities (including from the sale thereof), the Trustee will promptly give
notice to the Depositary, or for any Certificates which are not then held by DTC
or any other depository, directly to the registered holders of the Certificates
then outstanding and unpaid. Such notice shall state that, not later than 30
days after the receipt of such property, the Trustee will allocate and
distribute such property to the holders of Certificates then outstanding and
unpaid, pro rata by principal amount (after deducting the costs incurred in
connection therewith). Property other than cash will be liquidated by the


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Trustee, and the proceeds thereof distributed in cash, only to the extent
necessary to avoid distribution of fractional securities to Certificateholders.
In-kind distribution of such property to Certificateholders will be deemed to
reduce the principal amount of Certificates on a dollar-for-dollar basis.

         (e) Subject to Section 9(f) hereof, to the extent Available Funds are
insufficient to make any required distributions due to any class of Certificates
on any Distribution Date, any shortfall will be carried over and will be
distributed on the next Distribution Date (or date referred to in Section 5(f)
hereof) on which sufficient funds are available on the Available Funds to pay
such shortfall.

         (f) If a payment with respect to the Underlying Securities is made to
the Trustee after the Distribution Date on which such payment was scheduled to
be distributed in respect of the Certificates, then the Trustee will distribute
any such amounts received on the next occurring Business Day (a "Special
Distribution Date") as if the funds had constituted Available Funds on the
Distribution Date immediately preceding such Special Distribution Date;
provided, however, that the Record Date for such Special Distribution Date shall
be five Business Days prior to the day on which the related payment was received
from either of the Underlying Securities Trustees.

         (g) Notwithstanding Section 3.12 of the Standard Terms, if the
Underlying Securities Issuer ceases to file periodic reports as required under
the Exchange Act, the Depositor shall within a reasonable time instruct the
Trustee to (i) distribute the Underlying Securities in-kind to the
Certificateholders or (ii) sell the Underlying Securities and distribute the
proceeds of such sale to the Certificateholders in accordance with Section 5(a)
hereof; provided, however, that the Depositor shall not instruct the Trustee to
liquidate the Underlying Securities pursuant to this clause unless the
Underlying Securities Issuer has either (x) stated in writing that it intends
permanently to cease filing reports required under the Exchange Act or (y)
failed to file any required reports for one full calendar year.

         Section 6. Trustee's Fees. (a) As compensation for its services
hereunder, the Trustee shall be entitled to the Trustee Fee. The Trustee Fee
shall be paid by the Depositor and not from Trust Property. The Trustee shall
bear all Ordinary Expenses. Failure by the Depositor to pay such amount shall
not entitle the Trustee to any payment or reimbursement from the Trust, nor
shall such failure release the Trustee from the duties it is required to perform
under the Trust Agreement.

         (b) Extraordinary Expenses shall not be paid out of the Trust Property
unless all of the Certificateholders then outstanding have voted to require the
Trustee to incur such Extraordinary Expenses. The Trustee may incur other
Extraordinary Expenses if any lesser percentage of the Certificateholders
requesting such action pursuant hereto reimburse the Trustee for the cost
thereof from their own funds in advance. If Extraordinary Expenses are not
approved unanimously as set forth in the first sentence of this Section 6(b),


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such Extraordinary Expenses shall not be an obligation of the Trust, and the
Trustee shall not file any claim against the Trust therefor notwithstanding
failure of certificateholders to reimburse the Trustee.

         Section 7. Optional Exchange; Optional Call

                  (a) (i) On any Distribution Date, any holder of Class A-1
Certificates and Class A-2 Certificates and the related Call Warrants, if Call
Warrants related to such Certificates are outstanding, may exchange such
Certificates and, if applicable, the related Call Warrants, for a distribution
of Underlying Securities representing the same percentage of the Underlying
Securities as such Certificates represent of all outstanding Certificates.

                  (ii) The following conditions shall apply to any Optional
Exchange.

                           (a) A notice specifying the number of Certificates
                           being surrendered and the Optional Exchange Date
                           shall be delivered to the Trustee no less than 5 days
                           (or such shorter period acceptable to the Trustee)
                           but not more than 30 days before the Optional
                           Exchange Date.

                           (b) Certificates and, if applicable, the Call
                           Warrants, shall be surrendered to the Trustee no
                           later than 10:00 a.m. (New York City time) on the
                           Optional Exchange Date.

                           (c) Class A-1 Certificates and Class A-2 Certificates
                           representing a like percentage of all Class A-1
                           Certificates and Class A-2 Certificates shall be
                           surrendered.

                           (d) The Trustee shall have received an opinion of
                           counsel stating that the Optional Exchange would not
                           affect the characterization of the Trust as a
                           "grantor trust" for federal income tax purposes.

                           (e) Except in connection with the exchange of
                           Certificates acquired pursuant to Section 7(b), (1)
                           the Trustee shall have received a certification from
                           the Certificateholder that any Certificates being
                           surrendered have been held for at least six months,
                           and (2) the Certificates being surrendered may
                           represent no more than 5% (or 25% in the case of
                           Certificates acquired by the Underwriter but never
                           distributed to investors) of the then outstanding
                           Certificates.

                           (f) The Trustee shall not be obligated to determine
                           whether an Optional Exchange complies with the
                           applicable provisions for exemption under Rule 3a-7
                           of the Investment Company Act of 1940, as amended, or


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<PAGE>

                           the rules or regulations promulgated thereunder.

                           (g) The provisions of Section 4.07 of the Standard
                           Terms shall not apply to an Optional Exchange
                           pursuant to this Section 7(a). This Section 7(a)
                           shall not provide any person with a lien against, an
                           interest in or a right to specific performance with
                           respect to the Underlying Securities.

                  (b) (i) Concurrently with the execution of this Series
Supplement, the Trustee, on behalf of the Trust, shall execute the Warrant Agent
Agreement and the Call Warrants, dated as of the date hereof and substantially
in the forms of Exhibit B-1 and Exhibit B-2 hereto, initially evidencing all of
the Call Warrants. The Trustee shall perform the Trust's obligations under the
Warrant Agent Agreement and the Call Warrants in accordance with their
respective terms. On any Call Date, each class of Certificates may be called at
the applicable Call Price, in whole or in part, by the Warrant Holder, upon
payment of such Call Price on or prior to such Call Date. In the case of a call
in part, the Class A-1 Certificates and Class A-2 Certificates must be called in
the same proportion that each certificate bears to the outstanding principal
amount of the Certificates. In addition to the conditions described in this
Section 7(b) relating to any Optional Call, the conditions set forth in Section
1.1 of the Warrant Agent Agreement shall also apply.

                  (ii) The Warrant Holder may provide notice to the Trustee (a
"Call Notice") no less than 5 Business Days prior to any Call Date, that it is
exercising its Call Warrants with respect to the Certificates on such Call Date.
Upon request of the Trustee, the Warrant Holder shall deliver the opinion
specified in Section 7(a)(ii)(d) above as a condition to any Optional Call.

                  (iii) Upon receipt of a Call Notice, the Trustee shall provide
a conditional call notice to the Depository not less than 3 Business Days prior
to the applicable Call Date.

                  (iv) As a condition to any Optional Call, an opinion of
counsel to the Warrant Holder shall be delivered to the Rating Agencies, in form
satisfactory to the Rating Agencies, indicating that payment of the Call Price
shall not be recoverable as a preferential transfer or fraudulent conveyance
under the United States Bankruptcy Code. Such opinion may contain customary
assumptions and qualifications. In addition, the Warrant Holder shall provide a
certificate of solvency to the Trustee.

                  (v) Deliveries of the Underlying Securities to the Warrant
Holder (the "Purchaser") will only be made against payment by the Purchaser of
the Call Price in immediately available funds. Such payment must occur no later
than 10:00 a.m. New York City time on the Call Date. In the event that the
Purchaser fails to make such payment by such time (a "Purchase Default"), the
sale shall be voided and the Optional Call will be deemed not to be effective
with respect to such Distribution Date, and the Certificates and the Call


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<PAGE>

Warrants shall continue to remain outstanding. Subject to receipt of the Call
Price as aforesaid, the Trustee shall pay the Call Price to the
Certificateholders on the Call Date in accordance with the definition of "Call
Price". The Call Price in respect of partial calls shall be allocated to the
Certificateholders within each class pro rata to the extent of their
entitlements thereto.

                  (vi) The Trustee shall not consent to any amendment or
modification of this Agreement (including the Standard Terms) which would alter
the timing or amount of any payment of the Call Price without the prior written
consent of 100% of the Warrant Holders.

                  (vii) The Trustee shall not be obligated to determine whether
an Optional Call complies with the applicable provisions for exemption under
Rule 3a-7 of the Investment Company Act of 1940, as amended, or the rules or
regulations promulgated thereunder.

                  (viii) This Section 7 shall not provide the Warrant Holder
with a lien against, an interest in or a right to specific performance with
respect to the Underlying Securities.

                  (ix) The Warrant Holder shall initially be the Depositor.

         Section 8. Notices of Events of Default.

         As promptly as practicable after, and in any event within 30 days after
the occurrence of an Event of Default in respect of the Certificates actually
known to the Trustee, the Trustee will give notice to the Certificateholders,
transmitted by mail, of all such uncured or unwaived Events of Default known to
it. However, except in the case of an Event of Default relating to the payment
of principal, if any, or interest on any of the Underlying Securities, the
Trustee will be protected in withholding such notice if in good faith it
determines that the withholding of such notice is in the interest of the
Certificateholders.

         Section 9. Miscellaneous.

         (a) The provisions of Section 4.04, Advances, of the Standard Terms
shall not apply to the Series 2001-23 Certificates.

         (b) The provisions of Section 4.07, Optional Exchange, of the Standard
Terms shall not apply to the Series 2001-23 Certificates.

         (c) The Trustee shall simultaneously forward reports to
Certificateholders pursuant to Section 4.03 of the Standard Terms and to the New
York Stock Exchange.

         (d) Except as expressly provided herein, the Certificateholders shall
not be entitled to terminate the Trust or cause the sale or other disposition of
the Underlying Securities.



                                       13
<PAGE>

         (e) The provisions of Section 3.07(d) of the Standard Terms shall not
apply to the Series 2001-23 Certificates.

         (f) If the Trustee has not received payment with respect to a
Collection Period on the Underlying Securities on or prior to the related
Distribution Date, such distribution will be made promptly upon receipt of such
payment. No additional amounts shall accrue on the Certificates or be owed to
Certificateholders as a result of such delay; provided, however, that any
additional interest owed and paid by the Underlying Securities Issuer as a
result of such delay shall be paid to the Class A-1 Certificateholders, pro rata
in proportion to their respective entitlements to interest.

         (g) The outstanding principal balance of the Certificates shall not be
reduced by the amount of any Realized Losses (as defined in the Standard Terms).

         (h) The Trust may not engage in any business or activities other than
in connection with, or relating to, the holding, protecting and preserving of
the Trust Property and the issuance of the Certificates, and other than those
required or authorized by the Trust Agreement or incidental and necessary to
accomplish such activities. The Trust may not issue or sell any certificates or
other obligations other than the Certificates or otherwise incur, assume or
guarantee any indebtedness for money borrowed.

         (i) Notwithstanding anything in the Trust Agreement to the contrary,
the Trustee may be removed upon 60 days prior written notice delivered by the
holders of the Certificates representing the Required Percentage-Removal.

         (j) In the event that the Internal Revenue Service challenges the
characterization of the Trust as a grantor trust, the Trustee shall then file
such forms as the Depositor may specify to establish the Trust's election
pursuant to Section 761 of the Code to exclude the Trust from the application of
Subchapter K of the Code and is hereby empowered to execute such forms on behalf
of the Certificateholders.

         (k) Notwithstanding anything in the Standard Terms to the contrary, the
Trustee, upon written direction by the Depositor, will execute the Certificates.

         (l) In relation to Section 7.01(f) of the Standard Terms, any periodic
reports filed by the Trustee pursuant to the Securities and Exchange Act of
1934, as amended, and the rules and regulations promulgated thereunder, in
accordance with the customary practices of the Depositor, need not contain any
independent reports.

         (m) Notwithstanding anything in the Trust Agreement to the contrary,
the Trustee will have no recourse to the Underlying Securities.

         (n) The Trust will not merge or consolidate with any other entity
without confirmation from each Rating Agency that such merger or consolidation
will not result in the qualification, reduction or withdrawal of its
then-current rating on the Certificates.



                                       14
<PAGE>

         (o) Notices. All directions, demands and notices hereunder or under the
Standard Terms shall be in writing and shall be delivered as set forth below
(unless written notice is otherwise provided to the Trustee).

         If to the Depositor, to:

         Lehman ABS Corporation
         3 World Financial Center
         New York, New York  10285
         Attention:  Structured Credit Trading
         Telephone:  (212) 526-6570
         Facsimile:  (212) 526-1546

         If to the Trustee, to:

         U.S. Bank Trust National Association
         100 Wall Street
         New York, New York  10005
         Attention:  Corporate Trust
         Telephone:  (212) 361-2500
         Facsimile:  (212) 809-5459

         If to the Rating Agencies, to:

         Moody's Investors Service, Inc.
         99 Church Street 21W
         New York, New York  10007
         Attention:  CBO/CLO Monitoring Department
         Telephone:  (212) 553-1494
         Facsimile:  (212) 553-0355

         and to:

         Standard & Poor's
         55 Water Street
         New York, New York  10041
         Attention:  Structured Finance Surveillance Group
         Telephone:  (212) 438-2482
         Facsimile:  (212) 438-2664

         If to the New York Stock Exchange, to:

         New York Stock Exchange, Inc.
         20 Broad Street
         New York, New York  10005
         Attention:  Michael Hyland


                                       15
<PAGE>

         Telephone:  (212) 656-5868
         Facsimile:  (212) 656-6919

Section 10. Governing Law. THIS SERIES SUPPLEMENT AND THE TRANSACTIONS DESCRIBED
HEREIN SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE
STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE OF
NEW YORK, WITHOUT GIVING EFFECT TO THE CHOICE OF LAWS PROVISIONS THEREOF.

         Section 11. Counterparts. This Series Supplement may be executed in any
number of counterparts, each of which shall be deemed to be an original, and all
such counterparts shall constitute but one and the same instrument.

         Section 12. Termination of the Trust. The Trust shall terminate upon
the earliest to occur of (i) the payment in full at maturity or sale by the
Trust after a payment default on or an acceleration or other early payment of
the Underlying Securities and the distribution in full of all amounts due to the
Class A-1 and Class A-2 Certificateholders; (ii) the Final Scheduled
Distribution Date; (iii) the expiration of 21 years from the death of the last
survivor of the descendants of Joseph P. Kennedy, the late Ambassador of the
United States to the Court of St. James, living on the date hereof and (iv) the
exercise of all outstanding Call Warrants by the Warrant Holder.

         Section 13. Sale of Underlying Securities. In the event of a sale of
the Underlying Securities pursuant to Section 5(c) hereof or pursuant to the
instructions of the Warrant Agent under Section 1.2 of the Warrant Agent
Agreement, the Trustee shall solicit bids for the sale of the Underlying
Securities with settlement thereof on or before the third Business Day after
such sale from three leading dealers in the relevant market. Any of the
following dealers (or their successors) shall be deemed to qualify as leading
dealers: (1) Credit Suisse First Boston Corporation, (2) Goldman, Sachs & Co.,
(3) Merrill Lynch, Pierce, Fenner & Smith Incorporated, (4) UBS Warburg LLC, (5)
Salomon Smith Barney Inc., and (6) except in the case of a sale related to the
exercise of Call Warrants by the Depositor or any Affiliate thereof, Lehman
Brothers Inc. The Trustee shall not be responsible for the failure to obtain a
bid so long as it has made reasonable efforts to obtain bids. If a bid for the
sale of the Underlying Securities has been accepted by the Trustee but the sale
has failed to settle on the proposed settlement date, the Trustee shall request
new bids from such leading dealers. In the event of an Optional Exchange, the
Trustee shall only deliver the Underlying Securities to the purchaser of such
Underlying Securities or sell the Underlying Securities pursuant to this Section
13, as the case may be, against payment in same day funds deposited into the
Certificate Account.

         Section 14. Amendments. Notwithstanding anything in the Trust Agreement
to the contrary, in addition to the other restrictions on modification and
amendment contained therein, the Trustee shall not enter into any amendment or
modification of the Trust Agreement which would adversely affect in any material
respect the interests of the holders of any class of Certificates without the


                                       16
<PAGE>

consent of the holders of 100% of such class of Certificates; provided, however,
that no such amendment or modification will be permitted which would alter the
status of the Trust as a grantor trust for federal income tax purposes. Further,
no amendment shall be permitted which would adversely affect in any material
respect the interests of any Class of Certificateholders without confirmation by
each Rating Agency that such amendment will not result in a downgrading or
withdrawal of its rating of such Certificates.

         Section 15. Voting of Underlying Securities, Modification of Indenture.
The Trustee, as holder of the Underlying Securities, has the right to vote and
give consents and waivers in respect of the Underlying Securities as permitted
by the Depository and except as otherwise limited by the Trust Agreement. In the
event that the Trustee receives a request from the Depository, the Underlying
Securities Trustee or the Underlying Securities Issuer for its consent to any
amendment, modification or waiver of the Underlying Securities, the Underlying
Securities Indenture or any other document thereunder or relating thereto, or
receives any other solicitation for any action with respect to the Underlying
Securities, the Trustee shall mail a notice of such proposed amendment,
modification, waiver or solicitation to each Certificateholder of record as of
such date. The Trustee shall request instructions from the Certificateholders as
to whether or not to consent to or vote to accept such amendment, modification,
waiver or solicitation. The Trustee shall consent or vote, or refrain from
consenting or voting, in the same proportion (based on the relative outstanding
principal balances of the Certificates) as the Certificates of the Trust were
actually voted or not voted by the Certificateholders thereof as of a date
determined by the Trustee prior to the date on which such consent or vote is
required, provided, however, that, notwithstanding anything in the Trust
Agreement to the contrary, the Trustee shall at no time vote on or consent to
any matter (i) unless such vote or consent would not (based on an opinion of
counsel) alter the status of the Trust as a grantor trust for federal income tax
purposes or result in the imposition of tax upon the Certificateholders, (ii)
which would alter the timing or amount of any payment on the Underlying
Securities, including, without limitation, any demand to accelerate the
Underlying Securities, except in the event of a default under the Underlying
Securities or an event which with the passage of time would become an event of
default under the Underlying Securities and with the unanimous consent of all
outstanding Class A-1 Certificateholders and Class A-2 Certificateholders, or
(iii) which would result in the exchange or substitution of any of the
outstanding Underlying Securities pursuant to a plan for the refunding or
refinancing of such Underlying Securities except in the event of a default under
the Underlying Securities Indenture and only with the consent of
Certificateholders representing 100% of the Class A-1 Certificates and 100% of
the Class A-2 Certificates. The Trustee shall have no liability for any failure
to act resulting from Certificateholders' late return of, or failure to return,
directions requested by the Trustee from the Certificateholders.

         In the event that an offer is made by the Underlying Securities Issuer
to issue new obligations in exchange and substitution for any of the Underlying
Securities, pursuant to a plan for the refunding or refinancing of the
outstanding Underlying Securities or any other offer is made for the Underlying


                                       17
<PAGE>

Securities, the Trustee shall notify the Class A-1 Certificateholders and Class
A-2 Certificateholders of such offer promptly. The Trustee must reject any such
offer unless the Trustee is directed by the affirmative vote of the holders of
100% of all of the Certificates to accept such offer and the Trustee has
received the tax opinion described above. If pursuant to the preceding sentence,
the Trustee accepts any such offer, the Trustee shall promptly notify the Rating
Agencies.

         If an event of default under the Indenture occurs and is continuing,
and if directed by a majority of the outstanding Class A-1 Certificateholders
and Class A-2 Certificateholders, the Trustee shall vote the Underlying
Securities in an outstanding principal amount equal to the outstanding
certificate principal amount of the Certificates in favor of directing, or take
such other action as may be appropriate to direct, either of the Underlying
Securities Trustees to declare the unpaid principal amount of the Underlying
Securities and any accrued and unpaid interest thereon to be due and payable.











                                       18
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Series
Supplement to be duly executed by their respective authorized officers as of the
date first written above.

                              LEHMAN ABS CORPORATION,
                                  as Depositor


                              By:     /s/ Rene Canezin
                                 ---------------------------------------------
                                   Name:  Rene Canezin
                                   Title: Senior Vice President


                              U.S. BANK TRUST NATIONAL ASSOCIATION,
                                  not in its individual capacity
                                  but solely as Trustee on behalf
                                  of the Corporate Backed Trust
                                  Certificates Series, 2001-23
                                  Trust


                              By:     /s/ Marlene Fahey
                                 ------------------------------------------
                                   Name:  Marlene Fahey
                                   Title: Vice President and Assistant
                                          Secretary




                                       19
<PAGE>

                                                                      SCHEDULE I

                                 SERIES 2001-23

                         UNDERLYING SECURITIES SCHEDULE
                         ------------------------------

Underlying Securities:              6.95% Debentures due December 1, 2025.

Underlying Securities Issuer:       Ryder System, Inc.

CUSIP Number:                       783549AZ1.

Principal Amount Deposited:         $28,777,000.

Original Issue Date:                December 11, 1995.

Maturity Date:                      December 1, 2025.

Principal Payment Date:             December 1, 2025.

Interest Rate:                      6.95% per annum.

Interest Payment Dates:             June 1st and December 1st.





                                       20
<PAGE>

                                                                     SCHEDULE II

                       CLASS A-2 CERTIFICATE CALL SCHEDULE
                       -----------------------------------



                           Date              Call Price
                         12/01/01            $ 363,129
                         06/01/02            $ 381,285
                         12/01/02            $ 400,349
                         06/01/03            $ 420,367
                         12/01/03            $ 441,385
                         06/01/04            $ 463,455
                         12/01/04            $ 486,627
                         06/01/05            $ 510,959
                         12/01/05            $ 536,507
                         06/01/06            $ 563,332
                         12/01/06            $ 591,498
                         06/01/07            $ 621,073
                         12/01/07            $ 652,127
                         06/01/08            $ 684,733
                         12/01/08            $ 718,970
                         06/01/09            $ 754,919
                         12/01/09            $ 792,665
                         06/01/10            $ 832,298
                         12/01/10            $ 873,913
                         06/01/11            $ 917,608
                         12/01/11            $ 963,489
                         06/01/12          $ 1,011,663
                         12/01/12          $ 1,062,246
                         06/01/13          $ 1,115,359
                         12/01/13          $ 1,171,126
                         06/01/14          $ 1,229,683
                         12/01/14          $ 1,291,167
                         06/01/15          $ 1,355,725
                         12/01/15          $ 1,423,512
                         06/01/16          $ 1,494,687
                         12/01/16          $ 1,569,422
                         06/01/17          $ 1,647,893
                         12/01/17          $ 1,730,287
                         06/01/18          $ 1,816,802
                         12/01/18          $ 1,907,642
                         06/01/19          $ 2,003,024
                         12/01/19          $ 2,103,175
                         06/01/20          $ 2,208,334
                         12/01/20          $ 2,318,750
                         06/01/21          $ 2,434,688
                         12/01/21          $ 2,556,422
                         06/01/22          $ 2,684,243
                         12/01/22          $ 2,818,456
                         06/01/23          $ 2,959,378
                         12/01/23          $ 3,107,347
                         06/01/24          $ 3,262,715
                         12/01/24          $ 3,425,850
                         06/01/25          $ 3,597,143
                         12/01/25          --




                                       21
<PAGE>

                                                                     EXHIBIT A-1
                                                                     -----------

                       Form of Trust Certificate Class A-1
                       -----------------------------------

NUMBER [ ]                                    [1,000,000] $[25] PAR CERTIFICATES
                                                             CUSIP NO. [       ]

                       SEE REVERSE FOR CERTAIN DEFINITIONS

                  UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  THIS CERTIFICATE REPRESENTS A PROPORTIONATE UNDIVIDED
BENEFICIAL OWNERSHIP INTEREST IN THE TRUST AND DOES NOT EVIDENCE AN OBLIGATION
OF, OR AN INTEREST IN, AND IS NOT GUARANTEED BY THE DEPOSITOR OR THE TRUSTEE OR
ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE OR THE TRUST ASSETS
ARE INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR ANY OTHER PERSON.

                             LEHMAN ABS CORPORATION

                              [1,000,000] $[25] PAR

                      CORPORATE BACKED TRUST CERTIFICATES,

                                 SERIES 2001-23

                               8.00% INTEREST RATE

evidencing a proportionate undivided beneficial ownership interest in the Trust,
as defined below, the property of which consists principally of $[       ]
aggregate principal amount of 6.95% Debentures due December 1, 2025, issued by
Ryder System, Inc. (the "Underlying Security Issuer") and all payments received
thereon (the "Trust Property"), deposited in trust by Lehman ABS Corporation
(the "Depositor").

                  THIS CERTIFIES THAT [       ] is the registered owner of
$[       ] DOLLARS nonassessable, fully-paid, proportionate undivided
beneficial ownership interest in the Corporate Backed Trust Certificates, Series
2001-23 Trust, formed by the Depositor.




                                     A-1-1
<PAGE>

                  The Trust was created pursuant to a Standard Terms for Trust
Agreements, dated as of January 16, 2001 (the "Standard Terms"), between the
Depositor and U.S. Bank Trust National Association, a national banking
association, not in its individual capacity but solely as Trustee (the
"Trustee"), as supplemented by the Series Supplement, Series 2001-23, dated as
of June 1, 2001 (the "Series Supplement" and, together with the Standard Terms,
the "Trust Agreement"), between the Depositor and the Trustee. This Certificate
does not purport to summarize the Trust Agreement and reference is hereby made
to the Trust Agreement for information with respect to the interests, rights,
benefits, obligations, proceeds and duties evidenced hereby and the rights,
duties and obligations of the Trustee with respect hereto. A copy of the Trust
Agreement may be obtained from the Trustee by written request sent to the
Corporate Trust Office. Capitalized terms used but not defined herein have the
meanings assigned to them in the Trust Agreement.

                  This Certificate is one of the duly authorized Certificates
designated as the "Corporate Backed Trust Certificates, Series 2001-23, Class
A-1" (herein called the "Certificates"). This Certificate is issued under and is
subject to the terms, provisions and conditions of the Trust Agreement, to which
Trust Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound. The Trust Property consists
of: (i) Underlying Securities described in the Trust Agreement; (ii) all
payments on or collections in respect of the Underlying Securities accrued on or
after June 1, 2001 together with any proceeds thereof; and (iii) all funds from
time to time deposited with the Trustee relating to the Certificates, together
with any and all income, proceeds and payments with respect thereto; provided,
however, that any income from the investment of Trust funds in certain permitted
investments ("Eligible Investments") does not constitute Trust Property.

                  Subject to the terms and conditions of the Trust Agreement
(including the availability of funds for distributions) and until the obligation
created by the Trust Agreement shall have terminated in accordance therewith,
distributions will be made on each Distribution Date, to the Person in whose
name this Certificate is registered on the applicable Record Date, in an amount
equal to such Certificateholder's proportionate undivided beneficial ownership
interest in the amount required to be distributed to the Holders of the
Certificates on such Distribution Date. The Record Date applicable to any
Distribution Date is the close of business on the day immediately preceding such
Distribution Date (whether or not a Business Day). If a payment with respect to
the Underlying Securities is made to the Trustee after the date on which such
payment was due, then the Trustee will distribute any such amounts received on
the next occurring Business Day (a "Special Distribution Date").

                  Each Certificateholder, by its acceptance of a Certificate,
covenants and agrees that such Certificateholder will not at any time institute
against the Trust, or join in any institution against the Trust of, any
bankruptcy proceedings under any United States Federal or state bankruptcy or
similar law in connection with any obligations relating to the Certificates or
the Trust Agreement.

                  Distributions made on this Certificate will be made as
provided in the Trust Agreement by the Trustee by wire transfer in immediately
available funds, or check mailed to the Certificateholder of record in the


                                     A-1-2
<PAGE>

Certificate Register without the presentation or surrender of this Certificate
or the making of any notation hereon, except that with respect to Certificates
registered on the Record Date in the name of the nominee of the Clearing Agency
(initially, such nominee shall be Cede & Co.), payments will be made by wire
transfer in immediately available funds to the account designated by such
nominee. Except as otherwise provided in the Trust Agreement and notwithstanding
the above, the final distribution on this Certificate will be made after due
notice by the Trustee of the pendency of such distribution and only upon
presentation and surrender of this Certificate at the Corporate Trust Office or
such other location as may be specified in such notice.

                  Reference is hereby made to the further provisions of this
Certificate set forth on the reverse hereof, which further provisions shall for
all purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by or on behalf of the Trustee, by manual signature, this Certificate
shall not entitle the Holder hereof to any benefit under the Trust Agreement or
be valid for any purpose.

                  THIS CERTIFICATE SHALL BE CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT REFERENCE TO ITS CONFLICT OF LAW
PROVISIONS, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE HOLDER HEREOF SHALL
BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.





                                     A-1-3
<PAGE>

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed as of the date set forth below.


                           CORPORATE BACKED TRUST CERTIFICATES,
                           SERIES 2001-23 TRUST


                           By: U.S. BANK TRUST NATIONAL ASSOCIATION
                           not in its individual capacity but solely as
                           Trustee,


                           By:
                              --------------------------------------------------
                                Authorized Signatory


Dated: [       ]


                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                  This is on one of the Corporate Backed Trust Certificates,
Series 2001-23, described in the Trust Agreement referred to herein.

U.S. BANK TRUST NATIONAL ASSOCIATION
not in its individual capacity but solely as
Trustee,


By:
   ---------------------------------
    Authorized Signatory




                                     A-1-4
<PAGE>

                            (REVERSE OF CERTIFICATE)

                  The Certificates are limited in right of distribution to
certain payments and collections respecting the Underlying Securities, all as
more specifically set forth herein and in the Trust Agreement. The registered
Holder hereof, by its acceptance hereof, agrees that it will look solely to the
Trust Property (to the extent of its rights therein) for distributions
hereunder.

                  The Trust Agreement permits, with certain exceptions therein
provided, the amendment thereof and the modification of the rights and
obligations of the Depositor and the Trustee and the rights of the
Certificateholders under the Trust Agreement at any time by the Depositor and
the Trustee with the consent of the holders of Class A-1 Certificates in the
manner set forth in the Series Supplement and the Standard Terms. Any such
consent by the Holder of this Certificate (or any predecessor Certificate) shall
be conclusive and binding on such Holder and upon all future Holders of this
Certificate and of any Certificate issued upon the transfer hereof or in
exchange hereof or in lieu hereof whether or not notation of such consent in
made upon this Certificate. The Trust Agreement also permits the amendment
thereof, in certain limited circumstances, without the consent of the Holders of
any of the Certificates.

                  The Certificates are issuable in fully registered form only in
denominations of $25.

                  As provided in the Trust Agreement and subject to certain
limitations therein set forth, the transfer of this Certificate is registerable
in the Certificate Register upon surrender of this Certificate for registration
of transfer at the offices or agencies of the Certificate Registrar maintained
by the Trustee in the Borough of Manhattan, the City of New York, duly endorsed
by or accompanied by an assignment in the form below and by such other documents
as required by the Trust Agreement, and thereupon one or more new Certificates
of the same class in authorized denominations evidencing the same principal
amount will be issued to the designated transferee or transferees. The initial
Certificate Registrar appointed under the Trust Agreement is U.S. Bank Trust
National Association.

                  No service charge will be made for any registration of
transfer or exchange, but the Trustee may require exchange of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any transfer or exchange of Certificates.

                  The Depositor and the Trustee and any agent of the Depositor
or the Trustee may treat the Person in whose name this Certificate is registered
as the owner hereof for all purposes, and neither the Depositor, the Trustee,
nor any such agent shall be affected by any notice to the contrary.

                  It is the intention of the parties to the Trust Agreement that
the Trust created thereunder shall constitute a fixed investment trust for
federal income tax purposes under Treasury Regulation Section 301.7701-4, and
the Certificateholder agrees to treat the Trust, any distributions therefrom and


                                     A-1-5
<PAGE>

its beneficial interest in the Certificates consistently with such
characterization.

                  The Trust and the obligations of the Depositor and the Trustee
created by the Trust Agreement with respect to the Certificates shall terminate
upon the earliest to occur of (i) the distribution in full of all amounts due to
Certificateholders and retirement of the Underlying Securities; (ii) the
distribution in full of all Underlying Securities to the exchanging
Certificateholders on any Optional Exchange Date and any amounts due to
Certificateholders on any Optional Exchange Date; and (iii) the expiration of 21
years from the death of the last survivor of the descendants of Joseph P.
Kennedy, the late Ambassador of the United States to the Court of St. James,
living on the date hereof.

                  An employee benefit plan subject to the Employee Retirement
Income Security Act of 1974, as amended ("ERISA"), a plan described in Section
4975(e) of the Code, an entity whose underlying assets include plan assets by
reason of any such plan's investment in the entity, including an individual
retirement account or Keogh plan (any such, a "Plan") may purchase and hold
Certificates if the Plan can represent and warrant that its purchase and holding
of the Certificates would not be prohibited under ERISA or the Code.





                                     A-1-6
<PAGE>

                                   ASSIGNMENT

                  FOR VALUE RECEIVED the undersigned hereby sells, assigns and
transfers unto

PLEASE INSERT SOCIAL SECURITY
OR OTHER IDENTIFYING NUMBER
OF ASSIGNEE


(Please print or type name and address, including postal zip code, of assignee)
the within Certificate, and all rights thereunder, hereby irrevocably
constituting and appointing _______________ _____ Attorney to transfer said
Certificate on the books of the Certificate Register, with full power of
substitution in the premises.

Dated:


                                                                    *
                                                           Signature Guaranteed:


                                                                    *


*NOTICE: The signature to this assignment must correspond with the name as it
appears upon the face of the within Certificate in every particular, without
alteration, enlargement or any change whatever. Signatures must be guaranteed by
an "eligible guarantor institution" meeting the requirements of the Certificate
Registrar, which requirements include membership or participation in the
Security Transfer Agent Medallion Program ("STAMP") or such other "signature
guarantee program" as may be determined by the Certificate Registrar in addition
to, or in substitution for, STAMP, all in accordance with the Securities
Exchange Act of 1934, as amended.



                                     A-1-7
<PAGE>

                                                                     EXHIBIT A-2
                                                                     -----------

                       Form of Trust Certificate Class A-2
                       -----------------------------------

NUMBER [ ]                                                            $[       ]
                                                             CUSIP NO. [       ]

                       SEE REVERSE FOR CERTAIN DEFINITIONS

                  UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  THIS CERTIFICATE REPRESENTS A PROPORTIONATE UNDIVIDED
BENEFICIAL OWNERSHIP INTEREST IN THE TRUST AND DOES NOT EVIDENCE AN OBLIGATION
OF, OR AN INTEREST IN, AND IS NOT GUARANTEED BY THE DEPOSITOR OR THE TRUSTEE OR
ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THIS CERTIFICATE OR THE TRUST ASSETS
ARE INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR ANY OTHER PERSON.



                             LEHMAN ABS CORPORATION

                      CORPORATE BACKED TRUST CERTIFICATES,

                                 SERIES 2001-23

                           $[       ] PRINCIPAL AMOUNT

evidencing a proportionate undivided beneficial ownership interest in the Trust,
as defined below, the property of which consists principally of $[       ]
aggregate principal amount of 6.95% Debentures due December 1, 2025, issued by
Ryder System, Inc. (the "Underlying Security Issuer") and all payments received
thereon (the "Trust Property"), deposited in trust by Lehman ABS Corporation
(the "Depositor").

                  THIS CERTIFIES THAT [       ] is the registered owner of
$[       ] DOLLARS nonassessable, fully-paid, proportionate undivided beneficial
ownership interest in the Corporate Backed Trust Certificates, Series 2001-23
Trust, formed by the Depositor.




                                     A-2-1
<PAGE>

                  The Trust was created pursuant to a Standard Terms for Trust
Agreements, dated as of January 16, 2001 (the "Standard Terms"), between the
Depositor and U.S. Bank Trust National Association, a national banking
association, not in its individual capacity but solely as Trustee (the
"Trustee"), as supplemented by the Series Supplement, Series 2001-23, dated as
of June 1, 2001 (the "Series Supplement" and, together with the Standard Terms,
the "Trust Agreement"). This Certificate does not purport to summarize the Trust
Agreement and reference is hereby made to the Trust Agreement for information
with respect to the interests, rights, benefits, obligations, proceeds and
duties evidenced hereby and the rights, duties and obligations of the Trustee
with respect hereto. A copy of the Trust Agreement may be obtained from the
Trustee by written request sent to the Corporate Trust Office. Capitalized terms
used but not defined herein have the meanings assigned to them in the Trust
Agreement.

                  This Certificate is one of the duly authorized Certificates
designated as the "Corporate Backed Trust Certificates, Series 2001-23, Class
A-2" (herein called the "Certificates"). This Certificate is issued under and is
subject to the terms, provisions and conditions of the Trust Agreement, to which
Trust Agreement the Holder of this Certificate by virtue of the acceptance
hereof assents and by which such Holder is bound. The Trust Property consists
of: (i) Underlying Securities described in the Trust Agreement; (ii) all
payments on or collections in respect of the Underlying Securities accrued on or
after June 1, 2001 together with any proceeds thereof; and (iii) all funds from
time to time deposited with the Trustee relating to the Certificates, together
with any and all income, proceeds and payments with respect thereto; provided,
however, that any income from the investment of Trust funds in certain permitted
investments ("Eligible Investments") does not constitute Trust Property.

                  Subject to the terms and conditions of the Trust Agreement
(including the availability of funds for distributions) and until the obligation
created by the Trust Agreement shall have terminated in accordance therewith, no
distributions of interest will be made on this Certificate on any Distribution
Date.

                  Subject to the terms and conditions of the Trust Agreement
(including the availability of funds for distributions) and until the obligation
created by the Trust Agreement shall have terminated in accordance therewith,
the Trust will distribute on the Final Scheduled Distribution Date, to the
Person in whose name this Certificate is registered on the applicable Record
Date, an amount equal to such Certificateholder's proportionate undivided
beneficial ownership interest in the amount required to be distributed to the
Holders of the Certificates on such Final Scheduled Distribution Date.

                  The Record Date applicable to the Final Scheduled Distribution
Date is the close of business on the day immediately preceding such Final
Scheduled Distribution Date (whether or not a Business Day). If a payment with
respect to the Underlying Securities is made to the Trustee after the date on
which such payment was due, then the Trustee will distribute any such amounts
received on the next occurring Business Day (a "Special Distribution Date").



                                     A-2-2
<PAGE>

                  Each Certificateholder, by its acceptance of a Certificate,
covenants and agrees that such Certificateholder will not at any time institute
against the Trust, or join in any institution against the Trust of, any
bankruptcy proceedings under any United States Federal or state bankruptcy or
similar law in connection with any obligations relating to the Certificates or
the Trust Agreement.

                  Distributions made on this Certificate will be made as
provided in the Trust Agreement by the Trustee by wire transfer in immediately
available funds, or check mailed to the Certificateholder of record in the
Certificate Register without the presentation or surrender of this Certificate
or the making of any notation hereon, except that with respect to Certificates
registered on the Record Date in the name of the nominee of the Clearing Agency
(initially, such nominee shall be Cede & Co.), payments will be made by wire
transfer in immediately available funds to the account designated by such
nominee. Except as otherwise provided in the Trust Agreement and notwithstanding
the above, the final distribution on this Certificate will be made after due
notice by the Trustee of the pendency of such distribution and only upon
presentation and surrender of this Certificate at the Corporate Trust Office or
such other location as may be specified in such notice.

                  Reference is hereby made to the further provisions of this
Certificate set forth on the reverse hereof, which further provisions shall for
all purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by or on behalf of the Trustee, by manual signature, this Certificate
shall not entitle the Holder hereof to any benefit under the Trust Agreement or
be valid for any purpose.

                  THIS CERTIFICATE SHALL BE CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK, WITHOUT REFERENCE TO ITS CONFLICT OF LAW
PROVISIONS, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE HOLDER HEREOF SHALL
BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.




                                     A-2-3
<PAGE>

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed as of the date set forth below.


                         CORPORATE BACKED TRUST
                         CERTIFICATES, SERIES 2001-23 TRUST


                         By: U.S. BANK TRUST NATIONAL ASSOCIATION
                         not in its individual capacity but solely as
                         Trustee,


                         By:
                            --------------------------------------------------
                              Authorized Signatory


Dated: [       ]


                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                  This is on one of the Corporate Backed Trust Certificates,
Series 2001-23, described in the Trust Agreement referred to herein.

U.S. BANK TRUST NATIONAL ASSOCIATION
not in its individual capacity but solely as
Trustee,


By:
   ---------------------------------
    Authorized Signatory





                                     A-2-4
<PAGE>

                            (REVERSE OF CERTIFICATE)

                  The Certificates are limited in right of distribution to
certain payments and collections respecting the Underlying Securities, all as
more specifically set forth herein and in the Trust Agreement. The registered
Holder hereof, by its acceptance hereof, agrees that it will look solely to the
Trust Property (to the extent of its rights therein) for distributions
hereunder.

                  The Trust Agreement permits, with certain exceptions therein
provided, the amendment thereof and the modification of the rights and
obligations of the Depositor and the Trustee and the rights of the
Certificateholders under the Trust Agreement at any time by the Depositor and
the Trustee with the consent of the holders of Class A-2 Certificates in the
manner set forth in the Series Supplement and the Standard Terms. Any such
consent by the Holder of this Certificate (or any predecessor Certificate) shall
be conclusive and binding on such Holder and upon all future Holders of this
Certificate and of any Certificate issued upon the transfer hereof or in
exchange hereof or in lieu hereof whether or not notation of such consent in
made upon this Certificate. The Trust Agreement also permits the amendment
thereof, in certain limited circumstances, without the consent of the Holders of
any of the Certificates.

                  The Certificates are issuable in fully registered form only in
minimum principal amounts of $500,000 and in integral multiples of $1,000 in
excess thereof.

                  As provided in the Trust Agreement and subject to certain
limitations therein set forth, the transfer of this Certificate is registerable
in the Certificate Register upon surrender of this Certificate for registration
of transfer at the offices or agencies of the Certificate Registrar maintained
by the Trustee in the Borough of Manhattan, the City of New York, duly endorsed
by or accompanied by an assignment in the form below and by such other documents
as required by the Trust Agreement, and thereupon one or more new Certificates
of the same class in authorized denominations evidencing the same principal
amount will be issued to the designated transferee or transferees. The initial
Certificate Registrar appointed under the Trust Agreement is U.S. Bank Trust
National Association.

                  No service charge will be made for any registration of
transfer or exchange, but the Trustee may require exchange of a sum sufficient
to cover any tax or other governmental charge that may be imposed in connection
with any transfer or exchange of Certificates.

                  The Depositor and the Trustee and any agent of the Depositor
or the Trustee may treat the Person in whose name this Certificate is registered
as the owner hereof for all purposes, and neither the Depositor, the Trustee,
nor any such agent shall be affected by any notice to the contrary.

                  It is the intention of the parties to the Trust Agreement that
the Trust created thereunder shall constitute a fixed investment trust for
federal income tax purposes under Treasury Regulation Section 301.7701-4, and
the Certificateholder agrees to treat the Trust, any distributions therefrom and


                                     A-2-5
<PAGE>

its beneficial interest in the Certificates consistently with such
characterization.

                  The Trust and the obligations of the Depositor and the Trustee
created by the Trust Agreement with respect to the Certificates shall terminate
upon the earliest to occur of (i) the distribution in full of all amounts due to
Certificateholders and retirement of the Underlying Securities; (ii) the
distribution in full of all Underlying Securities to the exchanging
Certificateholders on any Optional Exchange Date and any amounts due to
Certificateholders on any Optional Exchange Date; and (iii) the expiration of 21
years from the death of the last survivor of the descendants of Joseph P.
Kennedy, the late Ambassador of the United States to the Court of St. James,
living on the date hereof.

                  An employee benefit plan subject to the Employee Retirement
Income Security Act of 1974, as amended ("ERISA"), a plan described in Section
4975(e) of the Code, an entity whose underlying assets include plan assets by
reason of any such plan's investment in the entity, including an individual
retirement account or Keogh plan (any such, a "Plan") may purchase and hold
Certificates if the Plan can represent and warrant that its purchase and holding
of the Certificates would not be prohibited under ERISA or the Code.





                                     A-2-6
<PAGE>

                                   ASSIGNMENT

                  FOR VALUE RECEIVED the undersigned hereby sells, assigns and
transfers unto

PLEASE INSERT SOCIAL SECURITY
OR OTHER IDENTIFYING NUMBER
OF ASSIGNEE


(Please print or type name and address, including postal zip code, of assignee)
the within Certificate, and all rights thereunder, hereby irrevocably
constituting and appointing ______________ ____ Attorney to transfer said
Certificate on the books of the Certificate Register, with full power of
substitution in the premises.

Dated:


                                                                    *
                                                           Signature Guaranteed:


                                                                    *


*NOTICE: The signature to this assignment must correspond with the name as it
appears upon the face of the within Certificate in every particular, without
alteration, enlargement or any change whatever. Signatures must be guaranteed by
an "eligible guarantor institution" meeting the requirements of the Certificate
Registrar, which requirements include membership or participation in the
Security Transfer Agent Medallion Program ("STAMP") or such other "signature
guarantee program" as may be determined by the Certificate Registrar in addition
to, or in substitution for, STAMP, all in accordance with the Securities
Exchange Act of 1934, as amended.



                                     A-2-7
<PAGE>

                                                                     EXHIBIT B-1
                                                                     -----------

           CORPORATE BACKED TRUST CERTIFICATES, SERIES 2001-23 TRUST,

                                    CLASS A-1

                              Form of Call Warrant

                              Dated as of [       ]

THIS CALL WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND MAY NOT BE TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF EXCEPT WHILE
A REGISTRATION UNDER SUCH ACT IS IN EFFECT OR PURSUANT TO AN EXEMPTION THEREFROM
UNDER SUCH ACT. THIS CALL WARRANT REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN
COMPLIANCE WITH THE CONDITIONS SPECIFIED IN THIS CALL WARRANT.

           CORPORATE BACKED TRUST CERTIFICATES, SERIES 2001-23 TRUST,

                                    CLASS A-1

                              Form of Call Warrant

                              [1,000,000] Warrants

 (Each Call Warrant relates to $[25] principal amount of Class A-1 Certificates)

           First Call Date: [          ] (subject to the terms hereof)


No. [    ]                                                          [          ]


         Corporate Backed Trust Certificates, Series 2001-23 Trust (the
"Trust"), a trust created under the laws of the State of New York pursuant to a
Standard Terms for Trust Agreements, dated as of January 16, 2001 (the
"Agreement"), between Lehman ABS Corporation (the "Depositor") and U.S. Bank
Trust National Association, a national banking association, not in its
individual capacity but solely as Trustee (the "Trustee"), as supplemented by
the Series Supplement 2001-23, dated as of May 1, 2001 (the "Series Supplement")
and, together with the Agreement, the "Trust Agreement"), between the Depositor
and the Trustee, for value received, hereby certifies that [    ] or registered
assigns, is entitled to call [1,000,000] 8.00% Class A-1 Certificates due
December 1, 2025 (the "Certificates"), issued by Corporate Backed Trust
Certificates, Series 2001-23 Trust in whole or in part on any Call Date (as
defined below) designated by the holder of this instrument (this "Call Warrant")
at a call price equal to the Call Price (as defined below), all subject to the
terms and conditions set forth below.



                                     B-1-1
<PAGE>

         Certain capitalized terms used in this Call Warrant are defined in
Article IV hereof; capitalized terms used but not defined herein shall have the
respective meanings set forth in the Trust Agreement; references to an "Exhibit"
are, unless otherwise specified, to one of the Exhibits attached to this Call
Warrant and references to a "Section" are, unless otherwise specified, to one of
the sections of this Call Warrant.

                                    ARTICLE I

                            Exercise of Call Warrants

         Section 1.1 Manner of Exercise. (a) This Call Warrant may be exercised
by the holder hereof (each, a "Warrant Holder"), in whole or in part, on any
Call Date, set forth in a written notice delivered to the Warrant Agent and the
Trustee at any time on or before the Business Day that is at least 5 Business
Days before such Call Date, by surrender of this Call Warrant to the Warrant
Agent at its office set forth in Section 6.3 hereof no later than 10:00 a.m.
(New York City time) on such Call Date; provided that such holder shall have
made payment to the Warrant Agent, by wire transfer or other immediately
available funds acceptable to the Warrant Agent, in the amount of the applicable
Call Price, in a manner such that funds are available to the Warrant Agent no
later than 10:00 a.m. (New York City time) on such Call Date, and such holder
shall thereupon be entitled to delivery of the Certificates in a Certificate
Principal Amount equal to $[25] per Call Warrant (if exercised in whole);
provided further that the Warrant Holder may only exercise Call warrants if it
is simultaneously exercising Call Warrants relating to Class A-1 Certificates
and Call Warrants relating to Class A-2 Certificates which represent a like
percentage of all Class A-1 Certificates and Class A-2 Certificates,
respectively; provided further that if the Warrant Holder is the Depositor or an
Affiliate thereof, such Warrant Holder shall not be entitled to delivery of the
Certificates being called (the "Called Certificates"), and shall only be
entitled to receive the cash proceeds of the sale of the Underlying Securities
related to such Called Certificates; and provided further that the Warrant
Holder may not exercise this Call Warrant at any time when such Warrant Holder
is insolvent, and in connection therewith, such Warrant Holder shall be required
to certify that it is solvent at the time of exercise settlement, by completing
the Form of Subscription attached to this Call Warrant and delivering such
completed Form of Subscription to the Trustee on or prior to the Call Date and
deliver to the Trustee a form reasonably satisfactory to the Trustee of the
opinion and the solvency certificate required pursuant to Section 7(b)(iv) of
the Series Supplement.

                  (b) The Warrant Agent shall notify the Trustee immediately
upon receipt by the Warrant Agent of a notice by the holder of this Call Warrant
and upon receipt of payment of the applicable Call Price from such holder
pursuant to clause (a) of this Section 1.1. The Warrant Agent shall transfer
each payment made by the holder hereof pursuant to clause (a) of this Section
1.1 to the Trustee in immediately available funds, for application pursuant to
the Trust Agreement on the applicable Call Date (and, pending such transfer,
shall hold each such payment for the benefit of the holder hereof in a
segregated trust account).



                                     B-1-2
<PAGE>

                  (c) A notice by the holder of a Call Warrant does not impose
any obligations on a holder of a Call Warrant in any way to pay any Call Price.
If, by 10:00 a.m. (New York City time) on the Call Date, the holder of the Call
Warrant being exercised has not paid the Call Price, then such notice shall
automatically expire and none of the holder of such Call Warrant, the Warrant
Agent and the Trustee shall have any obligations with respect to such notice by
the holder of such Call Warrant. The expiration of a notice by the holder of
this Call Warrant shall in no way affect a holder of a Call Warrant's right to
subsequently deliver a notice which satisfies the terms of the Trust Agreement.

         Section 1.2 Transfer of Certificates. As soon as practicable after each
surrender of this Call Warrant, in whole or in part on the Call Date and upon
satisfaction of all other requirements described in this Call Warrant, the
Warrant Agent shall instruct the Trustee to cause a number of the Class A-1
Certificates equal to the number of the Call Warrants being exercised hereunder
to reflect the new beneficial ownership of the Class A-1 Certificates, and, in
case such exercise is in part only, a new Call Warrant of like tenor,
representing the remaining outstanding Call Warrants of the holder, shall be
delivered by the Warrant Agent to the holder hereof.

         Section 1.3 Cancellation and Destruction of Call Warrant. All Call
Warrants surrendered to the Warrant Agent for the purpose of exercise (in whole
or in part) pursuant to Section 1.1 and actually exercised, or for the purpose
of transfer or exchange pursuant to Article III, shall be cancelled by the
Warrant Agent, and no Call Warrant shall be issued in lieu thereof. The Warrant
Agent shall destroy all cancelled Call Warrants.

         Section 1.4 No Rights as Holder of Certificates Conferred by Call
Warrants. Prior to the exercise hereof, this Call Warrant shall not entitle the
holder hereof to any of the rights of a holder of the Certificates, including,
without limitation, the right to receive the payment of any amount on or in
respect of the Certificates or to enforce any of the covenants of the Trust
Agreement.

                                   ARTICLE II

                            Restrictions on Transfer

         Section 2.1 Restrictive Legends. Except as otherwise permitted by this
Article II, each Call Warrant (including each Call Warrant issued upon the
transfer of any Call Warrant) shall be issued with a legend in substantially the
following form:

                  "This Call Warrant has not been registered under the
Securities Act of 1933, as amended, and may not be transferred, sold or
otherwise disposed of except while a registration under such Act is in effect or
pursuant to an exemption therefrom under such Act. This Call Warrant represented
hereby may be transferred only in compliance with the conditions specified in
this Call Warrant."



                                     B-1-3
<PAGE>

Section 2.2 Notice of Proposed Transfer; Opinions of Counsel. Prior to any
transfer of any Call Warrant or portion thereof, the holder hereof will give
five (5) Business Days (or such lesser period acceptable to the Warrant Agent)
prior written notice to the Warrant Agent of such holder's intention to effect
such transfer.

                                   ARTICLE III

                Registration and Transfer of Call Warrants, etc.

         Section 3.1 Warrant Register; Ownership of Call Warrants. The Warrant
Agent will keep a register in which the Warrant Agent will provide for the
registration of Call Warrants and the registration of transfers of Call Warrants
representing whole numbers of Call Warrants. The Trustee and the Warrant Agent
may treat the Person in whose name any Call Warrant is registered on such
register so the owner thereof for all purposes, and the Trustee and the Warrant
Agent shall not be affected by any notice to the contrary.

         Section 3.2 Transfer and Exchange of Call Warrants. Upon surrender of
any Call Warrant for registration of transfer or for exchange to the Warrant
Agent, the Warrant Agent shall (subject to compliance with Article II) execute
and deliver, and cause the Trustee, on behalf of the Trust, to execute and
deliver, in exchange therefor, a new Call Warrant of like tenor and evidencing a
like whole number of Call Warrants, in the name of such holder or as such holder
(upon payment by such holder of any applicable transfer taxes or government
charges) may direct.

         Section 3.3 Replacement of Call Warrants Upon receipt of evidence
reasonably satisfactory to the Warrant Agent of the loss, theft, destruction or
mutilation of any Call Warrant and, in the case of any such loss, theft or
destruction of any Call Warrant, upon delivery of an indemnity bond in such
reasonable amount as the Warrant Agent may determine, or, in the case of any
such mutilation, upon the surrender of such Call Warrant for cancellation to the
Warrant Agent, the Warrant Agent shall execute and deliver, and cause the
Trustee, on behalf of the Trust, to execute and deliver, in lieu thereof, a new
Call Warrant of like tenor bearing a number not contemporaneously outstanding.

         Section 3.4 Execution and Delivery of Call Warrants by Trustee. The
Trustee, on behalf of the Trust, hereby agrees (subject to compliance with
Article II) to execute and deliver such new Call Warrants issued in accordance
with Section 1.2 or this Article III as the Warrant Agent shall request in
accordance herewith.

                                   ARTICLE IV

                                   Definitions

         As used herein, unless the context otherwise requires, the following
terms have the following respective meanings:



                                     B-1-4
<PAGE>

         "Business Day":  As defined in the Trust Agreement.

         "Call Date": Any day occurring on or after June 1, 2006, or after the
announcement of any redemption or other unscheduled payment of the Certificates
on which the Call Warrants are exercised and the proceeds of an Optional Call
(as defined in the Series Supplement) are distributed to the Holders of the
Certificates pursuant to Section 7 of the Series Supplement.

         "Call Price": An amount paid by the Warrant Holder on each Call Date
equal to the principal amount of the Certificates being purchased pursuant to
the exercise of the Call Warrants plus accrued and unpaid interest (including
any deferred distributions with interest thereon) to and including the Call
Date.

         "Call Warrant": This instrument evidencing the right to call the
Certificates.

         "Closing Date":  [          ].

         "Depositor": As defined in the introduction to this Call Warrant, or
any successor thereto under the Trust Agreement.

         "Depositor Order": As defined in the Trust Agreement.

         "Person": Any individual, corporation, partnership, joint venture,
association, joint stock company, trust (including any beneficiary thereof),
unincorporated organization or government or any agency or political subdivision
thereof.

         "Rating Agencies": Standard & Poor's Ratings Services and Moody's
Investors Service, Inc. and any thereto.

         "Responsible Officer": As defined in the Trust Agreement.

         "Securities Act": The Securities Act of 1933, or any similar federal
statute, and the rules and regulations of the Commission thereunder, all as the
same shall be in effect at the time.

         "Trust": As defined in the introduction to this Call Warrant.

         "Trust Agreement": The Standard Terms for Trust Agreements, dated as of
January 16, 2001, between the Depositor and the Trustee, as supplemented by the
Series Supplement 2001-23, dated as of June 1, 2001, between the Depositor and
the Trustee, incorporating by reference the definitions and assumptions thereto,
as the same may be amended or modified from time to time.

         "Trustee": As defined in the introduction to this Warrant, or any
successor thereto under the Trust Agreement.



                                     B-1-5
<PAGE>

         "Warrant Agent": U.S. Bank Trust National Association, a national
banking association, in its capacity as warrant agent hereunder, or any
successor thereto hereunder.

                                    ARTICLE V

                                  Warrant Agent

         Section 5.1 Limitation on Liability. The Warrant Agent shall be
protected and shall incur no liability for or in respect of any action taken,
suffered or omitted by it in connection with its administration of the Call
Warrants in reliance upon any instrument of assignment or transfer, power of
attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement or other paper or document in good faith believed by it
to be genuine and to be signed, executed and, where necessary, verified and
acknowledged, by the proper Person or Persons.

         Section 5.2 Duties of Warrant Agent. The Warrant Agent undertakes only
the specific duties and obligations imposed hereunder upon the following terms
and conditions, by all of which the Depositor, the Trust, the Trustee and each
holder of a Call Warrant shall be bound:

                  (a) The Warrant Agent may consult with legal counsel (who may
be legal counsel for the Depositor), and the opinion of such counsel shall be
full and complete authorization and protection to the Warrant Agent as to any
action taken or omitted by it in good faith and in accordance with such opinion,
provided the Warrant Agent shall have exercised reasonable care in the selection
by it of such counsel.

                  (b) Whenever in the performance of its duties hereunder, the
Warrant Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Depositor or the Trustee prior to taking or
suffering any action hereunder, such fact or matter may be deemed to be
conclusively proved and established by a Depositor Order or a certificate signed
by a Responsible Officer of the Trustee and delivered to the Warrant Agent; and
such certificate shall be full authorization to the Warrant Agent for any action
taken or suffered in good faith by it hereunder in reliance upon such
certificate.

                  (c) The Warrant Agent shall be liable hereunder only for its
own negligence, willful misconduct or bad faith.

                  (d) The Warrant Agent shall not be liable for or by reason of
any of the statements of fact or recitals contained herein or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Trust and the Depositor only.

                  (e) The Warrant Agent shall not have any responsibility in
respect of and makes no representation as to the validity of this Call Warrant
or the execution and delivery hereof (except the due execution hereof by the


                                     B-1-6
<PAGE>

Warrant Agent); nor shall it be responsible for any breach by the Trust of any
covenant or condition contained in this Call Warrant; nor shall it by any act
hereunder be deemed to make any representation or warranty as to the
Certificates to be purchased hereunder.

                  (f) The Warrant Agent is hereby authorized and directed to
accept instructions with respect to the performance of its duties hereunder from
the Chairman of the Board, the Chief Executive Officer, Chief Financial Officer,
Chief Operating Officer, President, a Vice President, a Senior Vice President, a
Managing Director, its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary of the Depositor, and any Responsible Officer of the
Trustee, and to apply to such officers for advice or instructions in connection
with its duties, and it shall not be liable for any action taken or suffered to
be taken by it in good faith in accordance with instructions of any such
officer.

                  (g) The Warrant Agent and any shareholder, director, officer
or employee of the Warrant Agent may buy, sell or deal in any of the Call
Warrants or other securities of the Trust or otherwise act as fully and freely
as though it were not Warrant Agent hereunder, so long as such persons do so in
full compliance with all applicable laws. Nothing herein shall preclude the
Warrant Agent from acting in any other capacity for the Trust, the Depositor or
for any other legal entity.

                  (h) The Warrant Agent may execute and exercise any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through its attorneys or agents.

                  (i) The Warrant Agent shall act solely as the agent of the
Trust hereunder. The Warrant Agent shall not be liable except for the failure to
perform such duties as are specifically set forth herein, and no implied
covenants or obligations shall be read into this Call Warrant against the
Warrant Agent, whose duties shall be determined solely by the express provisions
hereof. The Warrant Agent shall not be deemed to be a fiduciary.

                  (j) The Warrant Agent shall not be responsible for any failure
on the part of the Trustee to comply with any of its covenants and obligations
contained herein.

                  (k) The Warrant Agent shall not be under any obligation or
duty to institute, appear in or defend any action, suit or legal proceeding in
respect hereof, unless first indemnified to its satisfaction, but this provision
shall not affect the power of the Warrant Agent to take such action as the
Warrant Agent may consider proper, whether with or without such indemnity. The
Warrant Agent shall promptly notify the Depositor and the Trustee in writing of
any claim made or action, suit or proceeding instituted against it arising out
of or in connection with this Call Warrant.

                  (l) The Trustee will perform, execute, acknowledge and deliver
or cause to be performed, executed, acknowledged and delivered all such further


                                     B-1-7
<PAGE>

acts, instruments and assurances as may be required by the Warrant Agent in
order to enable it to carry out or perform its duties hereunder.

         Section 5.3 Change of Warrant Agent. The Warrant Agent may resign and
be discharged from its duties hereunder upon thirty (30) days notice in writing
mailed to the Depositor and the Trustee by registered or certified mail, and to
the holders of the Call Warrants by first-class mail at the expense of the
Depositor; provided that no such resignation or discharge shall become effective
until a successor Warrant Agent shall have been appointed hereunder. The
Depositor may remove the Warrant Agent or any successor Warrant Agent upon
thirty (30) days notice in writing, mailed to the Warrant Agent or successor
Warrant Agent, as the case may be, and to the holders of the Call Warrants by
first-class mail; provided further that no such removal shall become effective
until a successor Warrant Agent shall have teen appointed hereunder. If the
Warrant Agent shall resign or be removed or shall otherwise become incapable of
acting, the Depositor shall promptly appoint a successor to the Warrant Agent,
which may be designated as an interim Warrant Agent. If an interim Warrant Agent
is designated, the Depositor shall then appoint a permanent successor to the
Warrant Agent, which may be the interim Warrant Agent. If the Depositor shall
fail to make such appointment of a permanent successor within a period of thirty
(30) days after such removal or within sixty (60) days after notification in
writing of such resignation or incapacity by the resigning or incapacitated
Warrant Agent or by the holder of a Call Warrant, then the Warrant Agent or
registered holder of any Warrant may apply to any court of competent
jurisdiction for the appointment of such a successor. Any successor to the
Warrant Agent appointed hereunder must be rated in one on the four highest
rating categories by the Rating Agencies. Any entity which may be merged or
consolidated with or which shall otherwise succeed to substantially all of the
trust or agency business of the Warrant Agent shall be deemed to be the
successor Warrant Agent without any further action.

                                   ARTICLE VI

                                  Miscellaneous

         Section 6.1 Remedies. The remedies at law of the holder of this Call
Warrant in the event of any default or threatened default by the Warrant Agent
in the performance of or compliance with any of the terms of this Call Warrant
are not and will not be adequate and, to the full extent permitted by law, such
terms may be specifically enforced by a decree for the specific performance of
any agreement contained herein or by an injunction against a violation of any of
the terms hereof or otherwise.

         Section 6.2 Limitation on Liabilities of Holder. Nothing contained in
this Call Warrant shall be construed as imposing any obligation on the holder
hereof to purchase any of the Certificates except in accordance with the terms
hereof.

         Section 6.3 Notices. All notices and other communications under this
Call Warrant shall be in writing and shall be delivered, or mailed by registered
or certified mail, return receipt requested, by a nationally recognized
overnight courier, postage prepaid, addressed (a) if to any holder of any Call


                                     B-1-8
<PAGE>

Warrant, at the registered address of such holder as set forth in the register
kept by the Warrant Agent or (b) if to the Warrant Agent, to 100 Wall Street,
Suite 1600, New York, New York 10005, Attention: Corporate Trust or to such
other address notice of which the Warrant Agent shall have given to the holder
hereof and the Trustee or (c) if to the Trust or the Trustee, to the Corporate
Trust Office (as set forth in the Trust Agreement); provided that the exercise
of any Call Warrant shall be effective on the manner provided in Article I.

         Section 6.4 Amendment. (a) This Call Warrant may be amended from time
to time by the Depositor, the Trustee and the Warrant Agent without the consent
of any holder hereof, upon receipt of an opinion of counsel satisfactory to the
Warrant Agent that the provisions hereof have been satisfied and that such
amendment would not alter the status of the Trust as a grantor trust under the
Code, for any of the following purposes: (i) to cure any ambiguity or to correct
or supplement any provision herein which may be defective or inconsistent with
any other provision herein or to provide for any other terms or modify any other
provisions with respect to matters or questions arising under this Warrant which
shall nor adversely affect in any material respect the interests of the holder
hereof or any holder of a Certificate or (ii) to evidence and provide for the
acceptance of appointment hereunder of a Warrant Agent other than U.S. Bank
Trust National Association.

                  (b) Without limiting the generality of the foregoing, this
Call Warrant may also be modified or amended from time to time by the Depositor,
the Trustee and the Warrant Agent with the consent of the holders of 66-2/3% of
the Call Warrants, upon receipt of an opinion of counsel satisfactory to the
Warrant Agent that the provisions hereof (including, without limitation, the
following proviso) have seen satisfied, for the purpose of adding any provisions
to or changing in any manner or eliminating any of the provisions of this Call
Warrant or of modifying in any manner the rights of the holders of this Call
Warrant; provided, however, that no such amendment shall (i) adversely affect in
any material respect the interests of holders of Certificates without the
consent of the holders of Certificates evidencing nor less than the Required
Percentage-Amendment of the aggregate Voting Rights of such affected
Certificates (as such terms are defined in the Trust Agreement) and without
written confirmation from the Rating Agencies that such amendment will not
result in a downgrading or withdrawal of its rating of the Certificates; (ii)
alter the dates on which Call Warrants are exercisable or the amounts
deliverable upon exercise of a Warrant without the consent of the holders of
Certificates evidencing not less than 100% of the aggregate Voting Rights of
such affected Certificates and the holders of 100% of the affected Call Warrants
or (iii) reduce the percentage of aggregate Voting Rights required by (i) or
(ii) without the consent of the holders of all such affected Certificates.
Notwithstanding any other provision of this Warrant, this Section 6.4(b) shall
not be amended without the consent of the holders of 100% of the affected Call
Warrants.

                  (c) Promptly after the execution of any such amendment or
modification, the Warrant Agent shall furnish a copy of such amendment or
modification to each holder of a Call Warrant, to the Trustee and to the Rating
Agencies. It shall not be necessary for the consent of holders of Call Warrants


                                     B-1-9
<PAGE>

or Certificates under this Section to approve the particular form of any
proposed amendment, but it shall be sufficient if such consent shall approve the
substance thereof. The manner of obtaining such consents and of evidencing the
authorization of the execution thereof shall be subject to such reasonable
regulations as the Warrant Agent may prescribe.

         Section 6.5 Expiration. The right to exercise this Call Warrant shall
expire on the earliest to occur of (a) the cancellation hereof, (b) the
termination of the Trust Agreement or (c) the liquidation, disposition, or
maturity of all of the Certificates.

         Section 6.6 Descriptive Headings. The headings in this Call Warrant are
for purposes of reference only and shall not limit or otherwise affect the
meaning hereof.

         Section 6.7 GOVERNING LAW. THIS CALL WARRANT SHALL BE CONSTRUED AND
ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY,
THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF
LAWS.

         Section 6.8 Judicial Proceedings; Waiver of Jury. Any judicial
proceeding brought against the Trust, the Trustee or the Warrant Agent with
respect to this Call Warrant may be brought in any court of competent
jurisdiction in the County of New York, State of New York or of the United
States of America for the Southern District of New York and, by execution and
delivery of this Call Warrant, the Trustee on behalf of the Trust and the
Warrant Agent (a) accept, generally and unconditionally, the nonexclusive
jurisdiction of such courts and any related appellate court, and irrevocably
agree that the Trust, the Trustee and the Warrant Agent shall be bound by any
judgment rendered thereby in connection with this Call Warrant, subject to any
rights of appeal, and (b) irrevocably waive any objection that the Trust or the
Trustee, the Warrant Agent may now or hereafter have as to the venue of any such
suit, action or proceeding brought in such a court or that such court is an
inconvenient forum. Each party hereto hereby waives, to the fullest extent
permitted by law, any right to a trial by jury in respect of any litigation
arising directly or indirectly out of, under or in connection with any of the
transaction documents or any of the transactions contemplated hereunder. Each
party hereto (a) certifies that no representative, agent or attorney of any
party hereto has represented, expressly or otherwise, that it would not, in the
event of litigation, seek to enforce the foregoing waiver and (b) acknowledges
that it has been induced to enter into the transaction documents to which it is
a party by, among other things, this waiver.

         Section 6.9 Nonpetition Covenant; No Recourse. Each of (i) the holder
of this Call Warrant by its acceptance hereof, and (ii) the Warrant Agent
agrees, that it shall not (and, in the case of the holder, that it shall not
direct the Warrant Agent to), until the date which is one year and one day after
the payment in full of the Certificates and all other securities issued by the
Trust, the Depositor or entities formed, established or settled by the
Depositor, acquiesce, petition or otherwise invoke or cause the Trust, the
Depositor, or any such other entity to invoke the process of the United States
of America, any State or other political subdivision thereof or any entity
exercising executive, legislative, judicial, regulatory or administrative


                                     B-1-10
<PAGE>

functions of or pertaining to government for the purpose of commencing or
sustaining a case by or against the Trust, the Depositor or any such other
entity under a federal or state bankruptcy, insolvency or similar law or
appointing a receiver, liquidator, assignee, trustee, custodian, sequestrator or
other similar official of the Trust, the Depositor or any such other entity or
all or any part of the property or assets of Trust, the Depositor or any such
other entity or ordering the winding up or liquidation of the affairs of the
Trust, the Depositor or any such other entity.















                                     B-1-11
<PAGE>

         Each of (i) the holder of this Call Warrant, by its acceptance hereof,
and (ii) the Warrant Agent agrees, that it shall not have any recourse to the
Certificates.

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         not in its individual
                                         capacity but solely as
                                         Trustee and Authenticating Agent


                                    By:_____________________________________
                                        Authorized Signatory

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         as Warrant Agent


                                    By:_____________________________________
                                        Authorized Signatory






                                     B-1-12
<PAGE>

                                    FORM OF SUBSCRIPTION

         [To be executed only upon exercise of Call Warrants]

         To:      Corporate Backed Trust Certificates, Series 2001-23 Trust

                  U.S. Bank Trust National Association, as Trustee
                  100 Wall Street, Suite 1600
                  New York, New York 10005
                  Attention:  Corporate Trust

         The undersigned registered holder of the within Call Warrant, having
previously given notice thereof in accordance with the terms of the Call
Warrant, hereby irrevocably exercises Warrant(s) for, and purchases pursuant
thereto, the Certificates receivable upon such exercise, and herewith makes
payment of $[ ] per Call Warrant therefor, and requests that such Certificates
be transferred to __________ [insert information required for transfer of
Certificates]. In connection therewith, the undersigned hereby certifies that it
is solvent as of the date hereof, as required by Section 1.1 of the Call
Warrant.

Dated:

         (Signature must conform in all respects to name of holder as specified
on the face of Call Warrant)

         (Street Address)
         (City) (State) (Zip Code)





                                     B-1-13
<PAGE>

                               FORM OF ASSIGNMENT

         [To be executed only upon transfer of Call Warrant]

         For value received, the undersigned registered holder of the within
Call Warrant hereby sells, assigns and transfers unto ______ the _______ Call
Warrant(s) [Must be whole number] to purchase Certificates to which such Call
Warrant relates, and appoints Attorney to make such transfer on the books of the
Warrant Agent maintained for such purpose, with full power of substitution in
the premises.

Dated:

         (Signature must conform in all respects to name of holder as specified
on the face of Warrant)

         (Street Address)
         (City State) (Zip Code)

Signed in the presence of:





                                     B-1-14
<PAGE>

                                                                     EXHIBIT B-2
                                                                     -----------

           CORPORATE BACKED TRUST CERTIFICATES, SERIES 2001-23 TRUST,

                                    CLASS A-2

                              Form of Call Warrant

                            Dated as of [          ]

THIS CALL WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND MAY NOT BE TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF EXCEPT WHILE
A REGISTRATION UNDER SUCH ACT IS IN EFFECT OR PURSUANT TO AN EXEMPTION THEREFROM
UNDER SUCH ACT. THIS CALL WARRANT REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN
COMPLIANCE WITH THE CONDITIONS SPECIFIED IN THIS CALL WARRANT.

           CORPORATE BACKED TRUST CERTIFICATES, SERIES 2001-23 TRUST,

                                    CLASS A-2

                                  Call Warrant

                              [3,777] Call Warrants

(Each Call Warrant related to $[1,000] principal amount of Class A-2
Certificates)

           First Call Date: [          ] (subject to the terms hereof)

No. [   ]                                                          [          ]


         Corporate Backed Trust Certificates, Series 2001-23 Trust (the
"Trust"), a trust created under the laws of the State of New York pursuant to a
Standard Terms for Trust Agreements, dated as of January 16, 2001 (the
"Agreement"), between Lehman ABS Corporation (the "Depositor") and U.S. Bank
Trust National Association, a national banking association, not in its
individual capacity but solely as Trustee (the "Trustee"), as supplemented by
the Series Supplement 2001-23, dated as of June 1, 2001 (the "Series
Supplement") and, together with the Agreement, the "Trust Agreement"), between
the Depositor and the Trustee, for value received, hereby certifies that [     ]
or registered assigns, is entitled to call $[3,777,000] aggregate principal
amount of Class A-2 Certificates due December 1, 2025, issued by Corporate
Backed Trust Certificates, Series 2001-23 Trust in whole or part on any Call
Date (as defined below) designated by the holder of this instrument (this "Call
Warrant") at a call price equal to the Call Price (as defined below), all
subject to the terms and conditions set forth below.




                                     B-2-1
<PAGE>

         Certain capitalized terms used in this Call Warrant are defined in
Article IV hereof; capitalized terms used but not defined herein shall have the
respective meanings set forth in the Trust Agreement; references to an "Exhibit"
are, unless otherwise specified, to one of the Exhibits attached to this Call
Warrant and references to a "Section" are, unless otherwise specified, to one of
the sections of this Call Warrant.

                                    ARTICLE I

                            Exercise of Call Warrants

         Section 1.1 Manner of Exercise. (a) This Call Warrant may be exercised
by the holder hereof (each, a "Warrant Holder"), in whole or in part, on any
Call Date, set forth in a written notice delivered to the Warrant Agent and the
Trustee at any time on or before the Business Day that is at least 5 Business
Days before such Call Date, by surrender of this Call Warrant to the Warrant
Agent at its office set forth in Section 6.3 hereof no later than 10:00 a.m.
(New York City time) on such Call Date; provided that such holder shall have
made payment to the Warrant Agent, by wire transfer or other immediately
available funds acceptable to the Warrant Agent, in the amount of the applicable
Call Price, in a manner such that funds are available to the Warrant Agent no
later than 10:00 a.m. (New York City time) on such Call Date, and such holder
shall thereupon be entitled to delivery of the Certificates in a Certificate
Principal Amount equal to $25 per Call Warrant (if exercised in whole); provided
further that the Warrant Holder may only exercise Call warrants if it is
simultaneously exercising Call Warrants relating to Class A-1 Certificates and
Call Warrants relating to Class A-2 Certificates which represent a like
percentage of all Class A-1 Certificates and Class A-2 Certificates,
respectively; provided further that if the Warrant Holder is the Depositor or an
Affiliate thereof, such Warrant Holder shall not be entitled to delivery of the
Certificates being called (the "Called Certificates"), and shall only be
entitled to receive the cash proceeds of the sale of the Underlying Securities
related to such Called Certificates; and provided further that the Warrant
Holder may not exercise this Call Warrant at any time when such Warrant Holder
is insolvent, and in connection therewith, such Warrant Holder shall be required
to certify that it is solvent at the time of exercise settlement, by completing
the Form of Subscription attached to this Call Warrant and delivering such
completed Form of Subscription to the Trustee on or prior to the Call Date and
deliver to the Trustee a form reasonably satisfactory to the Trustee of the
opinion and the solvency certificate required pursuant to Section 7(b)(iv) of
the Series Supplement.

         (b) The Warrant Agent shall notify the Trustee immediately upon receipt
by the Warrant Agent of a notice by the holder of this Call Warrant and upon
receipt of payment of the applicable Call Price from such holder pursuant to
clause (a) of this Section 1.1. The Warrant Agent shall transfer each payment
made by the holder hereof pursuant to clause (a) of this Section 1.1 to the
Trustee in immediately available funds, for application pursuant to the Trust
Agreement on the applicable Call Date (and, pending such transfer, shall hold
each such payment for the benefit of the holder hereof in a segregated trust
account).



                                     B-2-2
<PAGE>

                  (c) A notice by the holder of a Call Warrant does not impose
any obligations on a holder of a Call Warrant in any way to pay any Call Price.
If, by 10:00 a.m. (New York City time) on the Call Date, the holder of the Call
Warrant being exercised has not paid the Call Price, then such notice shall
automatically expire and none of the holder of such Call Warrant, the Warrant
Agent and the Trustee shall have any obligations with respect to such notice by
the holder of such Call Warrant. The expiration of a notice by the holder of
this Call Warrant shall in no way affect a holder of a Call Warrant's right to
subsequently deliver a notice which satisfies the terms of the Trust Agreement.

         Section 1.2 Transfer of Certificates. As soon as practicable after each
surrender of this Call Warrant, in whole or in part on the Call Date and upon
satisfaction of all other requirements described in this Call Warrant, the
Warrant Agent shall instruct the Trustee to cause a number of the Class A-1
Certificates equal to the number of the Call warrants being exercised hereunder
to reflect the new beneficial ownership fo the Class A-1 Certificates, and, in
case such exercise is in part only, a new Call Warrant of like tenor,
representing the remaining outstanding Call Warrants of the holder, shall be
delivered by the Warrant Agent to the holder hereof.

         Section 1.3 Cancellation and Destruction of Call Warrant. All Call
Warrants surrendered to the Warrant Agent for the purpose of exercise (in whole
or in part) pursuant to Section 1.1 and actually exercised, or for the purpose
of transfer or exchange pursuant to Article III, shall be cancelled by the
Warrant Agent, and no Call Warrant shall be issued in lieu thereof. The Warrant
Agent shall destroy all cancelled Call Warrants.

         Section 1.4 No Rights as Holder of Certificates Conferred by Call
Warrants. Prior to the exercise hereof, this Call Warrant shall not entitle the
holder hereof to any of the rights of a holder of the Certificates, including,
without limitation, the right to receive the payment of any amount on or in
respect of the Certificates or to enforce any of the covenants of the Trust
Agreement.

                                   ARTICLE II

                            Restrictions on Transfer

         Section 2.1 Restrictive Legends. Except as otherwise permitted by this
Article II, each Call Warrant (including each Call Warrant issued upon the
transfer of any Call Warrant) shall be issued with a legend in substantially the
following form:

                  "This Call Warrant has not been registered under the
Securities Act of 1933, as amended, and may not be transferred, sold or
otherwise disposed of except while a registration under such Act is in effect or
pursuant to an exemption therefrom under such Act. This Call Warrant represented
hereby may be transferred only in compliance with the conditions specified in
this Call Warrant."



                                     B-2-3
<PAGE>

Section 2.2 Notice of Proposed Transfer; Opinions of Counsel. Prior to any
transfer of any Call Warrant or portion thereof, the holder hereof will give
five (5) Business Days (or such lesser period acceptable to the Warrant Agent)
prior written notice to the Warrant Agent of such holder's intention to effect
such transfer.

                                   ARTICLE III

                Registration and Transfer of Call Warrants, etc.

         Section 3.1 Warrant Register; Ownership of Call Warrants. The Warrant
Agent will keep a register in which the Warrant Agent will provide for the
registration of Call Warrants and the registration of transfers of Call Warrants
representing whole numbers of Call Warrants. The Trustee and the Warrant Agent
may treat the Person in whose name any Call Warrant is registered on such
register so the owner thereof for all purposes, and the Trustee and the Warrant
Agent shall not be affected by any notice to the contrary.

         Section 3.2 Transfer and Exchange of Call Warrants. Upon surrender of
any Call Warrant for registration of transfer or for exchange to the Warrant
Agent, the Warrant Agent shall (subject to compliance with Article II) execute
and deliver, and cause the Trustee, on behalf of the Trust, to execute and
deliver, in exchange therefor, a new Call Warrant of like tenor and evidencing a
like whole number of Call Warrants, in the name of such holder or as such holder
(upon payment by such holder of any applicable transfer taxes or government
charges) may direct.

         Section 3.3 Replacement of Call Warrants Upon receipt of evidence
reasonably satisfactory to the Warrant Agent of the loss, theft, destruction or
mutilation of any Call Warrant and, in the case of any such loss, theft or
destruction of any Call Warrant, upon delivery of an indemnity bond in such
reasonable amount as the Warrant Agent may determine, or, in the case of any
such mutilation, upon the surrender of such Call Warrant for cancellation to the
Warrant Agent, the Warrant Agent shall execute and deliver, and cause the
Trustee, on behalf of the Trust, to execute and deliver, in lieu thereof, a new
Call Warrant of like tenor bearing a number not contemporaneously outstanding.

         Section 3.4 Execution and Delivery of Call Warrants by Trustee. The
Trustee, on behalf of the Trust, hereby agrees (subject to compliance with
Article II) to execute and deliver such new Call Warrants issued in accordance
with Section 1.2 or this Article III as the Warrant Agent shall request in
accordance herewith.

                                   ARTICLE IV

                                   Definitions

         As used herein, unless the context otherwise requires, the following
terms have the following respective meanings:



                                     B-2-4
<PAGE>

         "Business Day":  As defined in the Trust Agreement.

         "Call Date": Any day occurring on or after June 1, 2006, or after the
announcement of any redemption or other unscheduled payment of the Certificates
on which the Call Warrants are exercised and the proceeds of an Optional Call
(as defined in the Series Supplement) are distributed to the Holders of the
Certificates pursuant to Section 7 of the Series Supplement.

         "Call Price": An amount for each Call Date equal to the Accreted
Principal Amount of the Class A-2 Certificates to be purchased by the Warrant
Holder on such date.

         "Call Warrant": This instrument evidencing the right to call the
Certificates.

         "Closing Date":  [          ].

         "Depositor": As defined in the introduction to this Call Warrant, or
any successor thereto under the Trust Agreement.

         "Depositor Order":  As defined in the Trust Agreement.

         "Person": Any individual, corporation, partnership, joint venture,
association, joint stock company, trust (including any beneficiary thereof),
unincorporated organization or government or any agency or political subdivision
thereof.

         "Rating Agencies": Standard & Poor's Ratings Services and Moody's
Investors Service, Inc. and any thereto.

         "Responsible Officer":  As defined in the Trust Agreement.

         "Securities Act": The Securities Act of 1933, or any similar federal
statute, and the rules and regulations of the Commission thereunder, all as the
same shall be in effect at the time.

         "Trust":  As defined in the introduction to this Call Warrant.

         "Trust Agreement": The Standard Terms for Trust Agreements, dated as of
January 16, 2001, between the Depositor and the Trustee, as supplemented by the
Series Supplement 2001-23, dated as of June 1, 2001, between the Depositor and
the Trustee, incorporating by reference the definitions and assumptions thereto,
as the same may be amended or modified from time to time.

         "Trustee": As defined in the introduction to this Warrant, or any
successor thereto under the Trust Agreement.



                                     B-2-5
<PAGE>

         "Warrant Agent": U.S. Bank Trust National Association, a national
banking association, in its capacity as warrant agent hereunder, or any
successor thereto hereunder.

                                    ARTICLE V

                                  Warrant Agent

         Section 5.1 Limitation on Liability. The Warrant Agent shall be
protected and shall incur no liability for or in respect of any action taken,
suffered or omitted by it in connection with its administration of the Call
Warrants in reliance upon any instrument of assignment or transfer, power of
attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement or other paper or document in good faith believed by it
to be genuine and to be signed, executed and, where necessary, verified and
acknowledged, by the proper Person or Persons.

         Section 5.2 Duties of Warrant Agent. The Warrant Agent undertakes only
the specific duties and obligations imposed hereunder upon the following terms
and conditions, by all of which the Depositor, the Trust, the Trustee and each
holder of a Call Warrant shall be bound:

                  (a) The Warrant Agent may consult with legal counsel (who may
be legal counsel for the Depositor), and the opinion of such counsel shall be
full and complete authorization and protection to the Warrant Agent as to any
action taken or omitted by it in good faith and in accordance with such opinion,
provided the Warrant Agent shall have exercised reasonable care in the selection
by it of such counsel.

                  (b) Whenever in the performance of its duties hereunder, the
Warrant Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Depositor or the Trustee prior to taking or
suffering any action hereunder, such fact or matter may be deemed to be
conclusively proved and established by a Depositor Order or a certificate signed
by a Responsible Officer of the Trustee and delivered to the Warrant Agent; and
such certificate shall be full authorization to the Warrant Agent for any action
taken or suffered in good faith by it hereunder in reliance upon such
certificate.

                  (c) The Warrant Agent shall be liable hereunder only for its
own negligence, willful misconduct or bad faith.

                  (d) The Warrant Agent shall not be liable for or by reason of
any of the statements of fact or recitals contained herein or be required to
verify the same, but all such statements and recitals are and shall be deemed to
have been made by the Trust and the Depositor only.

                  (e) The Warrant Agent shall not have any responsibility in
respect of and makes no representation as to the validity of this Call Warrant
or the execution and delivery hereof (except the due execution hereof by the


                                     B-2-6
<PAGE>

Warrant Agent); nor shall it be responsible for any breach by the Trust of any
covenant or condition contained in this Call Warrant; nor shall it by any act
hereunder be deemed to make any representation or warranty as to the
Certificates to be purchased hereunder.

                  (f) The Warrant Agent is hereby authorized and directed to
accept instructions with respect to the performance of its duties hereunder from
the Chairman of the Board, the Chief Executive Officer, Chief Financial Officer,
Chief Operating Officer, President, a Vice President, a Senior Vice President, a
Managing Director, its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary of the Depositor, and any Responsible Officer of the
Trustee, and to apply to such officers for advice or instructions in connection
with its duties, and it shall not be liable for any action taken or suffered to
be taken by it in good faith in accordance with instructions of any such
officer.

                  (g) The Warrant Agent and any shareholder, director, officer
or employee of the Warrant Agent may buy, sell or deal in any of the Call
Warrants or other securities of the Trust or otherwise act as fully and freely
as though it were not Warrant Agent hereunder, so long as such persons do so in
full compliance with all applicable laws. Nothing herein shall preclude the
Warrant Agent from acting in any other capacity for the Trust, the Depositor or
for any other legal entity.

                  (h) The Warrant Agent may execute and exercise any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through its attorneys or agents.

                  (i) The Warrant Agent shall act solely as the agent of the
Trust hereunder. The Warrant Agent shall not be liable except for the failure to
perform such duties as are specifically set forth herein, and no implied
covenants or obligations shall be read into this Call Warrant against the
Warrant Agent, whose duties shall be determined solely by the express provisions
hereof. The Warrant Agent shall not be deemed to be a fiduciary.

                  (j) The Warrant Agent shall not be responsible for any failure
on the part of the Trustee to comply with any of its covenants and obligations
contained herein.

                  (k) The Warrant Agent shall not be under any obligation or
duty to institute, appear in or defend any action, suit or legal proceeding in
respect hereof, unless first indemnified to its satisfaction, but this provision
shall not affect the power of the Warrant Agent to take such action as the
Warrant Agent may consider proper, whether with or without such indemnity. The
Warrant Agent shall promptly notify the Depositor and the Trustee in writing of
any claim made or action, suit or proceeding instituted against it arising out
of or in connection with this Call Warrant.

                  (l) The Trustee will perform, execute, acknowledge and deliver
or cause to be performed, executed, acknowledged and delivered all such further


                                     B-2-7
<PAGE>

acts, instruments and assurances as may be required by the Warrant Agent in
order to enable it to carry out or perform its duties hereunder.

         Section 5.3 Change of Warrant Agent. The Warrant Agent may resign and
be discharged from its duties hereunder upon thirty (30) days notice in writing
mailed to the Depositor and the Trustee by registered or certified mail, and to
the holders of the Call Warrants by first-class mail at the expense of the
Depositor; provided that no such resignation or discharge shall become effective
until a successor Warrant Agent shall have been appointed hereunder. The
Depositor may remove the Warrant Agent or any successor Warrant Agent upon
thirty (30) days notice in writing, mailed to the Warrant Agent or successor
Warrant Agent, as the case may be, and to the holders of the Call Warrants by
first-class mail; provided further that no such removal shall become effective
until a successor Warrant Agent shall have been appointed hereunder. If the
Warrant Agent shall resign or be removed or shall otherwise become incapable of
acting, the Depositor shall promptly appoint a successor to the Warrant Agent,
which may be designated as an interim Warrant Agent. If an interim Warrant Agent
is designated, the Depositor shall then appoint a permanent successor to the
Warrant Agent, which may be the interim Warrant Agent. If the Depositor shall
fail to make such appointment of a permanent successor within a period of thirty
(30) days after such removal or within sixty (60) days after notification in
writing of such resignation or incapacity by the resigning or incapacitated
Warrant Agent or by the holder of a Call Warrant, then the Warrant Agent or
registered holder of any Warrant may apply to any court of competent
jurisdiction for the appointment of such a successor. Any successor to the
Warrant Agent appointed hereunder must be rated in one on the four highest
rating categories by the Rating Agencies. Any entity which may be merged or
consolidated with or which shall otherwise succeed to substantially all of the
trust or agency business of the Warrant Agent shall be deemed to be the
successor Warrant Agent without any further action.

                                   ARTICLE VI

                                  Miscellaneous

         Section 6.1 Remedies. The remedies at law of the holder of this Call
Warrant in the event of any default or threatened default by the Warrant Agent
in the performance of or compliance with any of the terms of this Call Warrant
are not and will not be adequate and, to the full extent permitted by law, such
terms may be specifically enforced by a decree for the specific performance of
any agreement contained herein or by an injunction against a violation of any of
the terms hereof or otherwise.

         Section 6.2 Limitation on Liabilities of Holder. Nothing contained in
this Call Warrant shall be construed as imposing any obligation on the holder
hereof to purchase any of the Certificates except in accordance with the terms
hereof.

         Section 6.3 Notices. All notices and other communications under this
Call Warrant shall be in writing and shall be delivered, or mailed by registered
or certified mail, return receipt requested, by a nationally recognized
overnight courier, postage prepaid, addressed (a) if to any holder of any Call


                                     B-2-8
<PAGE>

Warrant, at the registered address of such holder as set forth in the register
kept by the Warrant Agent or (b) if to the Warrant Agent, to 100 Wall Street,
Suite 1600, New York, New York 10005, Attention: Corporate Trust or to such
other address notice of which the Warrant Agent shall have given to the holder
hereof and the Trustee or (c) if to the Trust or the Trustee, to the Corporate
Trust Office (as set forth in the Trust Agreement); provided that the exercise
of any Call Warrant shall be effective on the manner provided in Article I.

         Section 6.4 Amendment. (a) This Call Warrant may be amended from time
to time by the Depositor, the Trustee and the Warrant Agent without the consent
of any holder hereof, upon receipt of an opinion of counsel satisfactory to the
Warrant Agent that the provisions hereof have been satisfied and that such
amendment would not alter the status of the Trust as a grantor trust under the
Code, for any of the following purposes: (i) to cure any ambiguity or to correct
or supplement any provision herein which may be defective or inconsistent with
any other provision herein or to provide for any other terms or modify any other
provisions with respect to matters or questions arising under this Warrant which
shall nor adversely affect in any material respect the interests of the holder
hereof or any holder of a Certificate or (ii) to evidence and provide for the
acceptance of appointment hereunder of a Warrant Agent other than U.S. Bank
Trust National Association.

                  (b) Without limiting the generality of the foregoing, this
Call Warrant may also be modified or amended from time to time by the Depositor,
the Trustee and the Warrant Agent with the consent of the holders of 66-2/3% of
the Call Warrants, upon receipt of an opinion of counsel satisfactory to the
Warrant Agent that the provisions hereof (including, without limitation, the
following proviso) have seen satisfied, for the purpose of adding any provisions
to or changing in any manner or eliminating any of the provisions of this Call
Warrant or of modifying in any manner the rights of the holders of this Call
Warrant; provided, however, that no such amendment shall (i) adversely affect in
any material respect the interests of holders of Certificates without the
consent of the holders of Certificates evidencing nor less than the Required
Percentage-Amendment of the aggregate Voting Rights of such affected
Certificates (as such terms are defined in the Trust Agreement) and without
written confirmation from the Rating Agencies that such amendment will not
result in a downgrading or withdrawal of its rating of the Certificates; (ii)
alter the dates on which Call Warrants are exercisable or the amounts
deliverable upon exercise of a Warrant without the consent of the holders of
Certificates evidencing not less than 100% of the aggregate Voting Rights of
such affected Certificates and the holders of 100% of the affected Call Warrants
or (iii) reduce the percentage of aggregate Voting Rights required by (i) or
(ii) without the consent of the holders of all such affected Certificates.
Notwithstanding any other provision of this Warrant, this Section 6.4(b) shall
not be amended without the consent of the holders of 100% of the affected Call
Warrants.

                  (c) Promptly after the execution of any such amendment or
modification, the Warrant Agent shall furnish a copy of such amendment or
modification to each holder of a Call Warrant, to the Trustee and to the Rating
Agencies. It shall not be necessary for the consent of holders of Call Warrants


                                     B-2-9
<PAGE>

or Certificates under this Section to approve the particular form of any
proposed amendment, but it shall be sufficient if such consent shall approve the
substance thereof. The manner of obtaining such consents and of evidencing the
authorization of the execution thereof shall be subject to such reasonable
regulations as the Warrant Agent may prescribe.

         Section 6.5 Expiration. The right to exercise this Call Warrant shall
expire on the earliest to occur of (a) the cancellation hereof, (b) the
termination of the Trust Agreement or (c) the liquidation, disposition, or
maturity of all of the Certificates.

         Section 6.6 Descriptive Headings. The headings in this Call Warrant are
for purposes of reference only and shall not limit or otherwise affect the
meaning hereof.

         Section 6.7 GOVERNING LAW. THIS CALL WARRANT SHALL BE CONSTRUED AND
ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY,
THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF
LAWS.

         Section 6.8 Judicial Proceedings; Waiver of Jury. Any judicial
proceeding brought against the Trust, the Trustee or the Warrant Agent with
respect to this Call Warrant may be brought in any court of competent
jurisdiction in the County of New York, State of New York or of the United
States of America for the Southern District of New York and, by execution and
delivery of this Call Warrant, the Trustee on behalf of the Trust and the
Warrant Agent (a) accept, generally and unconditionally, the nonexclusive
jurisdiction of such courts and any related appellate court, and irrevocably
agree that the Trust, the Trustee and the Warrant Agent shall be bound by any
judgment rendered thereby in connection with this Call Warrant, subject to any
rights of appeal, and (b) irrevocably waive any objection that the Trust or the
Trustee, the Warrant Agent may now or hereafter have as to the venue of any such
suit, action or proceeding brought in such a court or that such court is an
inconvenient forum. Each party hereto hereby waives, to the fullest extent
permitted by law, any right to a trial by jury in respect of any litigation
arising directly or indirectly out of, under or in connection with any of the
transaction documents or any of the transactions contemplated hereunder. Each
party hereto (a) certifies that no representative, agent or attorney of any
party hereto has represented, expressly or otherwise, that it would not, in the
event of litigation, seek to enforce the foregoing waiver and (b) acknowledges
that it has been induced to enter into the transaction documents to which it is
a party by, among other things, this waiver.

         Section 6.9 Nonpetition Covenant; No Recourse. Each of (i) the holder
of this Call Warrant by its acceptance hereof, and (ii) the Warrant Agent
agrees, that it shall not (and, in the case of the holder, that it shall not
direct the Warrant Agent to), until the date which is one year and one day after
the payment in full of the Certificates and all other securities issued by the
Trust, the Depositor or entities formed, established or settled by the
Depositor, acquiesce, petition or otherwise invoke or cause the Trust, the
Depositor, or any such other entity to invoke the process of the United States
of America, any State or other political subdivision thereof or any entity
exercising executive, legislative, judicial, regulatory or administrative


                                     B-2-10
<PAGE>

functions of or pertaining to government for the purpose of commencing or
sustaining a case by or against the Trust, the Depositor or any such other
entity under a federal or state bankruptcy, insolvency or similar law or
appointing a receiver, liquidator, assignee, trustee, custodian, sequestrator or
other similar official of the Trust, the Depositor or any such other entity or
all or any part of the property or assets of Trust, the Depositor or any such
other entity or ordering the winding up or liquidation of the affairs of the
Trust, the Depositor or any such other entity.














                                     B-2-11
<PAGE>

         Each of (i) the holder of this Call Warrant, by its acceptance hereof,
and (ii) the Warrant Agent agrees, that it shall not have any recourse to the
Certificates.

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         not in its individual
                                         capacity but solely as
                                         Trustee and Authenticating Agent


                                    By:_____________________________________
                                        Authorized Signatory

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         as Warrant Agent


                                    By:_____________________________________
                                        Authorized Signatory






                                     B-2-12
<PAGE>

                                    FORM OF SUBSCRIPTION

         [To be executed only upon exercise of Call Warrants]

         To:      Corporate Backed Trust Certificates, Series 2001-23 Trust

                  U.S. Bank Trust National Association, as Trustee
                  100 Wall Street, Suite 1600
                  New York, New York 10005
                  Attention:  Corporate Trust

         The undersigned registered holder of the within Call Warrant, having
previously given notice thereof in accordance with the terms of the Call
Warrant, hereby irrevocably exercises Warrant(s) for, and purchases pursuant
thereto, the Certificates receivable upon such exercise, and herewith makes
payment of $[ ] per Call Warrant therefor, and requests that such Certificates
be transferred to __________ [insert information required for transfer of
Certificates]. In connection therewith, the undersigned hereby certifies that it
is solvent as of the date hereof, as required by Section 1.1 of the Call
Warrant.

Dated:

         (Signature must conform in all respects to name of holder as specified
on the face of Call Warrant)

         (Street Address)
         (City) (State) (Zip Code)





                                     B-2-13
<PAGE>

                               FORM OF ASSIGNMENT

         [To be executed only upon transfer of Call Warrant]

         For value received, the undersigned registered holder of the within
Call Warrant hereby sells, assigns and transfers unto ______ the _______ Call
Warrant(s) [Must be whole number] to purchase Certificates to which such Call
Warrant relates, and appoints Attorney to make such transfer on the books of the
Warrant Agent maintained for such purpose, with full power of substitution in
the premises.

Dated:

         (Signature must conform in all respects to name of holder as specified
on the face of Warrant)

         (Street Address)
         (City State) (Zip Code)

Signed in the presence of:





                                     B-2-14
<PAGE>

                                                                       EXHIBIT C
                                                                       ---------

                         FORM OF WARRANT AGENT AGREEMENT

                       CORPORATE BACKED TRUST CERTIFICATES

                              Series 2001-23 TRUST

         WARRANT AGENT AGREEMENT, dated as of June 1, 2001 (the "Warrant Agent
Agreement"), by and between LEHMAN ABS CORPORATION, as Depositor (the
"Depositor"), and U.S. BANK TRUST NATIONAL ASSOCIATION, as Warrant Agent (the
"Warrant Agent").

                              W I T N E S S E T H:

         WHEREAS, the Depositor created Corporate Backed Trust Certificates,
Series 2001-23 Trust (the "Trust"), a trust created under the laws of the State
of New York pursuant to a Standard Terms for Trust Agreements, dated as of
January 16, 2001 (the "Agreement"), between Lehman ABS Corporation (the
"Depositor") and U.S. Bank Trust National Association, a national banking
association, not in its individual capacity but solely as Trustee (the
"Trustee"), as supplemented by the Series Supplement 2001-23, dated as of June
1, 2001 (the "Series Supplement" and, together with the Agreement, the "Trust
Agreement"), between the Depositor and the Trustee; and

         WHEREAS, in connection with the creation of the Trust and the deposit
therein of the Underlying Securities, it is desired to provide for the issuance
of Class A-1 Certificates and related Class A-1 Call Warrants and Class A-2
Certificates (together with the Class A-1 Certificates, the "Certificates") and
related Class A-2 Call Warrants (together with the Class A-1 Call Warrants, the
"Call Warrants"), such Certificates evidencing undivided interests in the Trust.

         NOW, THEREFORE, in consideration of the foregoing premises and the
mutual covenants expressed herein, it is hereby agreed by and between the
Depositor and the Trustee as follows:

         Section 1. Definitions. Except as otherwise specified herein or as the
context may otherwise require, capitalized terms used herein but not defined
herein shall have the respective meanings set forth below for all purposes under
the Series Supplement.

                                    ARTICLE I

                            Exercise of Call Warrants

         Section 1.1 Manner of Exercise. (a) The Call Warrants may be exercised
by the holder thereof (each, a "Warrant Holder"), in whole or in part, on any
Call Date, set forth in a written notice (a "Call Notice") delivered to the
Warrant Agent and the Trustee at any time on or before the Business Day that is
at least 5 Business Days before such Call Date, by surrender of the Call
Warrants to the Warrant Agent at its office set forth in Section 6.3 hereof no
later than 10:00 a.m. (New York City time) on such Call Date; provided that such


                                      C-1
<PAGE>

holder shall have made payment to the Warrant Agent, by wire transfer or other
immediately available funds acceptable to the Warrant Agent, in the amount of
the applicable Call Price, in a manner such that funds are available to the
Warrant Agent no later than 10:00 a.m. (New York City time) on such Call Date,
and such holder shall thereupon be entitled to delivery of, in the case of the
Class A-1 Call Warrants, Class A-1 Certificates in a Certificate Principal
Amount equal to $25 per Class A-1 Call Warrant and, in the case of the Class A-2
Call Warrants, Class A-2 Certificates in an amount per Call Warrant equal to a
$1,000 principal amount of Class A-2 Certificates purchased hereunder in
accordance with this Article I (in each case subject to the provisions of
Section 7(b) of the Series Supplement); provided further that the Warrant Holder
shall exercise Class A-1 Warrants relating to the Class A-1 Certificates and
Class A-2 Call Warrants relating to the Class A-2 Certificates which represent a
like percentage for all Class A-1 Certificates and Class A-2 Certificates,
respectively; and provided further that the Warrant Holder may not exercise the
Call Warrants at any time when such Warrant Holder is insolvent, and in
connection therewith, such Warrant Holder shall be required to certify that it
is solvent at the time of exercise settlement, by completing the Form of
Subscription attached to the Call Warrants and delivering such completed Form of
Subscription to the Trustee on or prior to the Call Date and deliver to the
Trustee a form reasonably satisfactory to the Trustee of the opinion and the
solvency certificate required pursuant to Section 7(b)(iv) of the Series
Supplement.

                  (b) Upon exercise of Call Warrants, any Warrant Holder other
than the Depositor or any Affiliate of the Depositor shall be entitled to
delivery of the Called Certificates. The "Called Certificates" shall be, in the
case of Class A-1 Certificates, Class A-1 Certificates having a Certificate
Principal Amount equal to $25 per Class A-1 Call Warrant and, in the case of
Class A-2 Certificates, Class A-2 Certificates having a Certificate Principal
Amount equal to $1,000 per Class A-2 Call Warrant. Any Warrant Holder which is
the Depositor or any Affiliate of the Depositor shall receive the proceeds of
the sale of the Called Underlying Securities and shall not be entitled to
receive the related Called Certificates. "Called Underlying Securities" are
Underlying Securities which represent the same percentage of the Underlying
Securities as the Called Certificates represent of the Class A-1 Certificates
and Class A-2 Certificates.

                  (c) The Warrant Agent shall notify the Trustee immediately
upon receipt by the Warrant Agent of a Call Notice by the holder of the Call
Warrants and upon receipt of payment of the applicable Call Price from such
holder pursuant to clause (a) of this Section 1.1. The Warrant Agent shall
transfer each payment made by the holder thereof pursuant to clause (a) of this
Section 1.1 to the Trustee in immediately available funds, for application
pursuant to the Trust Agreement on the applicable Call Date (and, pending such
transfer, shall hold each such payment for the benefit of the holder thereof in
a segregated trust account).

                  (d) A Call Notice by the holder of a Call Warrant does not
impose any obligations on a holder of a Call Warrant in any way to pay any Call
Price. If, by 10:00 a.m. (New York City time) on the Call Date, the holder of
the Call Warrant being exercised has not paid the Call Price, then such Call
Notice shall automatically expire and none of the holder of such Call Warrant,
the Warrant Agent and the Trustee shall have any obligations with respect to


                                      C-2
<PAGE>

such Call Notice by the holder of such Call Warrant. The expiration of a Call
Notice by the holder of this Call Warrant shall in no way affect a holder of a
Call Warrant's right to subsequently deliver a Call Notice which satisfies the
terms of the Trust Agreement.

         Section 1.2 Transfer of Certificates. As soon as practicable after each
surrender of Call Warrants in whole or in part on the Call Date and upon
satisfaction of all other requirements described in the Call Warrants and in
Section 1.1 hereof, the Warrant Agent shall instruct the Trustee as follows:

                  (a) if Call Warrants are being exercised by any Warrant Holder
other than the Depositor or any Affiliate of the Depositor, to cause the Called
Certificates to reflect the holder's beneficial ownership of such Certificates,
or

                  (b) if the Call Warrants are being exercised by the Depositor
or any Affiliate of the Depositor, to cause the Called Underlying Securities to
be sold pursuant to Section 13 of the Series Supplement and to distribute the
proceeds of such sale to the Warrant Holder.

         If such exercise is in part only, the Warrant Agent shall instruct the
Trustee to authenticate new Call Warrants of like tenor, representing the
outstanding Call Warrants of the Warrant Holder and the Warrant Agent shall
deliver such Call Warrants to the Warrant Holder.

         Section 1.3 Cancellation and Destruction of Call Warrants. All Call
Warrants surrendered to the Warrant Agent for the purpose of exercise (in whole
or in part) pursuant to Section 1.1 and actually exercised, or for the purpose
of transfer or exchange pursuant to Article III, shall be cancelled by the
Warrant Agent, and no Call Warrant shall be issued in lieu thereof. The Warrant
Agent shall destroy all cancelled Call Warrants.

         Section 1.4 No Rights as Holder of Certificates Conferred by Call
Warrants. Prior to the exercise thereof, the Call Warrants shall not entitle the
holder thereof to any of the rights of a holder of the Certificates, including,
without limitation, the right to receive the payment of any amount on or in
respect of the Certificates or to enforce any of the covenants of the Trust
Agreement.

                                   ARTICLE II

                            Restrictions on Transfer

         Section 2.1 Restrictive Legends. Except as otherwise permitted by this
Article II, each Call Warrant (including each Call Warrant issued upon the
transfer of any Call Warrant) shall be issued with a legend in substantially the
following form:

                  "This Call Warrant has not been registered under the
Securities Act of 1933, as amended, and may not be transferred, sold or
otherwise disposed of except while a registration under such Act is in effect or
pursuant to an exemption therefrom under such Act. The Call Warrant represented


                                      C-3
<PAGE>

hereby may be transferred only in compliance with the conditions specified in
the Call Warrants."

         Section 2.2 Notice of Proposed Transfer; Opinions of Counsel. Prior to
any transfer of any Call Warrant or portion thereof, the holder thereof will
give 5 Business Days (or such lesser period acceptable to the Warrant Agent)
prior written notice to the Warrant Agent of such holder's intention to effect
such transfer.

                                   ARTICLE III

                Registration and Transfer of Call Warrants, etc.

         Section 3.1 Warrant Register; Ownership of Call Warrants. The Warrant
Agent will keep a register in which the Warrant Agent will provide for the
registration of Call Warrants and the registration of transfers of Call Warrants
representing whole numbers of Call Warrants. The Trustee and the Warrant Agent
may treat the Person in whose name any Call Warrant is registered on such
register so the owner thereof for all purposes, and the Trustee and the Warrant
Agent shall not be affected by any notice to the contrary.

         Section 3.2 Transfer and Exchange of Call Warrants. Upon surrender of
any Call Warrant for registration of transfer or for exchange to the Warrant
Agent, the Warrant Agent shall (subject to compliance with Article II) execute
and deliver, and cause the Trustee, on behalf of the Trust, to execute and
deliver, in exchange therefor, a new Call Warrant of like tenor and evidencing a
like whole number of Call Warrants, in the name of such holder or as such holder
(upon payment by such holder of any applicable transfer taxes or government
charges) may direct; provided that as a condition precedent for transferring the
Call Warrants, the prospective transferee shall be required to deliver to the
Trustee and the Depositor an executed copy of the Investment Letter (set forth
as Exhibit A hereto).

         Section 3.3 Replacement of Call Warrants Upon receipt of evidence
reasonably satisfactory to the Warrant Agent of the loss, theft, destruction or
mutilation of any Call Warrant and, in the case of any such loss, theft or
destruction of any Call Warrant, upon delivery of an indemnity bond in such
reasonable amount as the Warrant Agent may determine, or, in the case of any
such mutilation, upon the surrender of such Call Warrant for cancellation to the
Warrant Agent, the Warrant Agent shall execute and deliver, and cause the
Trustee, on behalf of the Trust, to execute and deliver, in lieu thereof, a new
Call Warrant of like tenor bearing a number not contemporaneously outstanding.

         Section 3.4 Execution and Delivery of Call Warrants by Trustee. The
Trustee, on behalf of the Trust, hereby agrees (subject to compliance with
Article II) to execute and deliver such new Call Warrants issued in accordance
with Section 1.2 or this Article III as the Warrant Agent shall request in
accordance herewith.



                                      C-4
<PAGE>

                                   ARTICLE IV

                                   Definitions

                  As used herein, unless the context otherwise requires, the
following terms have the following respective meanings:

                  "Business Day":  As defined in the Trust Agreement.

                  "Call Date": Any day occurring on or after June 1, 2006, or
after the announcement of any redemption or other unscheduled payment of the
Certificates on which the Call Warrants are exercised and the proceeds of an
Optional Call (as defined in the Series Supplement) are distributed to the
Holders of the Certificates pursuant to Section 7 of the Series Supplement.

                  "Call Price": An amount paid by the Warrant Holder on each
Call Date equal to (i) in the case of the Class A-1 Certificates, the principal
amount of the Class A-1 Certificates to be purchased by the Warrant Holder on
such date, plus any accrued and unpaid interest on such amount to but excluding
the Call Date and (ii) in the case of the Class A-2 Certificates, the Accreted
Principal Amount of the Class A-2 Certificates to be purchased by the Warrant
Holder on such date.

                  "Call Warrant":  As defined in the recitals.

                  "Closing Date":  June 1, 2001.

                  "Depositor":  As defined in the recitals.

                  "Depositor Order":  As defined in the Trust Agreement.

                  "Person": Any individual, corporation, partnership, joint
venture, association, joint stock company, trust (including any beneficiary
thereof), unincorporated organization or government or any agency or political
subdivision thereof.

                  "Rating Agencies": Standard & Poor's Ratings Services and
Moody's Investors Service, Inc. and any thereto.

                  "Responsible Officer": As defined in the Trust Agreement.

                  "Securities Act": The Securities Act of 1933, or any similar
federal statute, and the rules and regulations of the Commission thereunder, all
as the same shall be in effect at the time.

                  "Trust":  As defined in the recitals.

                  "Trust Agreement": The Standard Terms for Trust Agreements,
dated as of January 16, 2001, between the Depositor and the Trustee, as
supplemented by the Series Supplement 2001-23, dated as of June 1, 2001, between


                                      C-5
<PAGE>

the Depositor and the Trustee, incorporating by reference the definitions and
assumptions thereto, as the same may be amended or modified from time to time.

                  "Trustee": As defined in the introduction to this Warrant, or
any successor thereto under the Trust Agreement.

                  "Warrant Agent": U.S. Bank Trust National Association, a
national banking association, in its capacity as warrant agent hereunder, or any
successor thereto.

                                    ARTICLE V

                                  Warrant Agent

         Section 5.1 Limitation on Liability. The Warrant Agent shall be
protected and shall incur no liability for or in respect of any action taken,
suffered or omitted by it in connection with its administration of the Call
Warrants in reliance upon any instrument of assignment or transfer, power of
attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement or other paper or document in good faith believed by it
to be genuine and to be signed, executed and, where necessary, verified and
acknowledged, by the proper Person or Persons.

         Section 5.2 Duties of Warrant Agent. The Warrant Agent undertakes only
the specific duties and obligations imposed hereunder upon the following terms
and conditions, by all of which the Depositor, the Trust, the Trustee and each
holder of a Call Warrant shall be bound:

                  (a) The Warrant Agent may consult with legal counsel (who may
be legal counsel for the Depositor), and the opinion of such counsel shall be
full and complete authorization and protection to the Warrant Agent as to any
action taken or omitted by it in good faith and in accordance with such opinion,
provided the Warrant Agent shall have exercised reasonable care in the selection
by it of such counsel.

                  (b) Whenever in the performance of its duties hereunder, the
Warrant Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Depositor or the Trustee prior to taking or
suffering any action hereunder, such fact or matter may be deemed to be
conclusively proved and established by a Depositor Order or a certificate signed
by a Responsible Officer of the Trustee and delivered to the Warrant Agent; and
such certificate shall be full authorization to the Warrant Agent for any action
taken or suffered in good faith by it hereunder in reliance upon such
certificate.

                  (c) The Warrant Agent shall be liable hereunder only for its
own negligence, willful misconduct or bad faith.

                  (d) The Warrant Agent shall not be liable for or by reason of
any of the statements of fact or recitals contained herein or be required to
verify the same, but all such statements and recitals are and shall be deemed to


                                      C-6
<PAGE>

have been made by the Trust and the Depositor only.

                  (e) The Warrant Agent shall not have any responsibility in
respect of and makes no representation as to the validity of the Call Warrants
or the execution and delivery thereof (except the due execution hereof by the
Warrant Agent); nor shall it be responsible for any breach by the Trust of any
covenant or condition contained in the Call Warrants; nor shall it by any act
thereunder be deemed to make any representation or warranty as to the
Certificates to be purchased thereunder.

                  (f) The Warrant Agent is hereby authorized and directed to
accept instructions with respect to the performance of its duties hereunder from
the Chairman of the Board, the Chief Executive Officer, Chief Financial Officer,
Chief Operating Officer, President, a Vice President, a Senior Vice President, a
Managing Director, its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary of the Depositor, and any Responsible Officer of the
Trustee, and to apply to such officers for advice or instructions in connection
with its duties, and it shall not be liable for any action taken or suffered to
be taken by it in good faith in accordance with instructions of any such
officer.

                  (g) The Warrant Agent and any shareholder, director, officer
or employee of the Warrant Agent may buy, sell or deal in any of the Call
Warrants or other securities of the Trust or otherwise act as fully and freely
as though it were not Warrant Agent hereunder, so long as such persons do so in
full compliance with all applicable laws. Nothing herein shall preclude the
Warrant Agent from acting in any other capacity for the Trust, the Depositor or
for any other legal entity.

                  (h) The Warrant Agent may execute and exercise any of the
rights or powers hereby vested in it or perform any duty hereunder either itself
or by or through its attorneys or agents.

                  (i) The Warrant Agent shall act solely as the agent of the
Trust hereunder. The Warrant Agent shall not be liable except for the failure to
perform such duties as are specifically set forth herein, and no implied
covenants or obligations shall be read into the Call Warrants against the
Warrant Agent, whose duties shall be determined solely by the express provisions
thereof. The Warrant Agent shall not be deemed to be a fiduciary.

                  (j) The Warrant Agent shall not be responsible for any failure
on the part of the Trustee to comply with any of its covenants and obligations
contained herein.

                  (k) The Warrant Agent shall not be under any obligation or
duty to institute, appear in or defend any action, suit or legal proceeding in
respect hereof, unless first indemnified to its satisfaction, but this provision
shall not affect the power of the Warrant Agent to take such action as the
Warrant Agent may consider proper, whether with or without such indemnity. The
Warrant Agent shall promptly notify the Depositor and the Trustee in writing of
any claim made or action, suit or proceeding instituted against it arising out
of or in connection with the Call Warrants.



                                      C-7
<PAGE>

                  (l) The Trustee will perform, execute, acknowledge and deliver
or cause to be performed, executed, acknowledged and delivered all such further
acts, instruments and assurances as may be required by the Warrant Agent in
order to enable it to carry out or perform its duties hereunder.

                  Section 5.3 Change of Warrant Agent. The Warrant Agent may
resign and be discharged from its duties hereunder upon thirty (30) days notice
in writing mailed to the Depositor and the Trustee by registered or certified
mail, and to the holders of the Call Warrants by first-class mail at the expense
of the Depositor; provided that no such resignation or discharge shall become
effective until a successor Warrant Agent shall have been appointed hereunder.
The Depositor may remove the Warrant Agent or any successor Warrant Agent upon
thirty (30) days notice in writing, mailed to the Warrant Agent or successor
Warrant Agent, as the case may be, and to the holders of the Call Warrants by
first-class mail; provided further that no such removal shall become effective
until a successor Warrant Agent shall have been appointed hereunder. If the
Warrant Agent shall resign or be removed or shall otherwise become incapable of
acting, the Depositor shall promptly appoint a successor to the Warrant Agent,
which may be designated as an interim Warrant Agent. If an interim Warrant Agent
is designated, the Depositor shall then appoint a permanent successor to the
Warrant Agent, which may be the interim Warrant Agent. If the Depositor shall
fail to make such appointment of a permanent successor within a period of thirty
(30) days after such removal or within sixty (60) days after notification in
writing of such resignation or incapacity by the resigning or incapacitated
Warrant Agent or by the holder of a Call Warrant, then the Warrant Agent or
registered holder of any Warrant may apply to any court of competent
jurisdiction for the appointment of such a successor. Any successor to the
Warrant Agent appointed hereunder must be rated in one on the four highest
rating categories by the Rating Agencies. Any entity which may be merged or
consolidated with or which shall otherwise succeed to substantially all of the
trust or agency business of the Warrant Agent shall be deemed to be the
successor Warrant Agent without any further action.

                                   ARTICLE VI

                                  Miscellaneous

         Section 6.1 Remedies. The remedies at law of the holder of the Call
Warrants in the event of any default or threatened default by the Warrant Agent
in the performance of or compliance with any of the terms of the Call Warrants
are not and will not be adequate and, to the full extent permitted by law, such
terms may be specifically enforced by a decree for the specific performance of
any agreement contained herein or by an injunction against a violation of any of
the terms thereof or otherwise.

         Section 6.2 Limitation on Liabilities of Holder. Nothing contained in
this Warrant Agent Agreement shall be construed as imposing any obligation on
the holder thereof to purchase any of the Certificates except in accordance with
the terms thereof.

         Section 6.3 Notices. All notices and other communications under this
Warrant Agent Agreement shall be in writing and shall be delivered, or mailed by
registered or certified mail, return receipt requested, by a nationally


                                      C-8
<PAGE>

recognized overnight courier, postage prepaid, addressed (a) if to any holder of
any Call Warrants, at the registered address of such holder as set forth in the
register kept by the Warrant Agent or (b) if to the Warrant Agent, to 100 Wall
Street, Suite 1600, New York, New York 10005, Attention: Corporate Trust or to
such other address notice of which the Warrant Agent shall have given to the
holder thereof and the Trustee or (c) if to the Trust or the Trustee, to the
Corporate Trust Office (as set forth in the Trust Agreement); provided that the
exercise of any Call Warrants shall be effective on the manner provided in
Article I.

         Section 6.4 Amendment. (a) This Warrant Agent Agreement may be amended
from time to time by the Depositor, the Trustee and the Warrant Agent without
the consent of any holder thereof, upon receipt of an opinion of counsel
satisfactory to the Warrant Agent that the provisions hereof have been satisfied
and that such amendment would not alter the status of the Trust as a grantor
trust under the Code, for any of the following purposes: (i) to cure any
ambiguity or to correct or supplement any provision herein which may be
defective or inconsistent with any other provision herein or to provide for any
other terms or modify any other provisions with respect to matters or questions
arising under the Call Warrant which shall nor adversely affect in any material
respect the interests of the holder thereof or any holder of a Certificate or
(ii) to evidence and provide for the acceptance of appointment hereunder of a
Warrant Agent other than U.S. Bank Trust National Association.

                  (b) Without limiting the generality of the foregoing, the Call
Warrants may also be modified or amended from time to time by the Depositor, the
Trustee and the Warrant Agent with the consent of the holders of 66-2/3% of each
class of the Call Warrants, upon receipt of an opinion of counsel satisfactory
to the Warrant Agent that the provisions hereof (including, without limitation,
the following proviso) have seen satisfied, for the purpose of adding any
provisions to or changing in any manner or eliminating any of the provisions of
the Call Warrants or of modifying in any manner the rights of the holders of the
Call Warrants; provided, however, that no such amendment shall (i) adversely
affect in any material respect the interests of holders of Certificates without
the consent of the holders of Certificates evidencing nor less than the Required
Percentage-Amendment of the aggregate Voting Rights of such affected
Certificates (as such terms are defined in the Trust Agreement) and without
written confirmation from the Rating Agencies that such amendment will not
result in a downgrading or withdrawal of its rating of the Certificates; (ii)
alter the dates on which Call Warrants are exercisable or the amounts payable
upon exercise of a Warrant without the consent of the holders of Certificates
evidencing not less than 100% of the aggregate Voting Rights of such affected
Certificates and the holders of 100% of the affected Call Warrants or (iii)
reduce the percentage of aggregate Voting Rights required by (i) or (ii) without
the consent of the holders of all such affected Certificates. Notwithstanding
any other provision of this Warrant, this Section 6.4(b) shall not be amended
without the consent of the holders of 100% of the affected Call Warrants.

                  (c) Promptly after the execution of any such amendment or
modification, the Warrant Agent shall furnish a copy of such amendment or
modification to each holder of a Call Warrant, to the Trustee and to the Rating
Agencies. It shall not be necessary for the consent of holders of Call Warrants


                                      C-9
<PAGE>

or Certificates under this Section to approve the particular form of any
proposed amendment, but it shall be sufficient if such consent shall approve the
substance thereof. The manner of obtaining such consents and of evidencing the
authorization of the execution thereof shall be subject to such reasonable
regulations as the Warrant Agent may prescribe.

         Section 6.5 Expiration. The right to exercise the Call Warrants shall
expire on the earliest to occur of (a) the cancellation thereof, (b) the
termination of the Trust Agreement, (c) the liquidation, disposition, or
maturity of all of the Certificates, or (d) the occurrence of an Event of
Default under the Trust Agreement.

         Section 6.6 Descriptive Headings. The headings in this Warrant Agent
Agreement are for purposes of reference only and shall not limit or otherwise
affect the meaning hereof.

         Section 6.7 GOVERNING LAW. THIS CALL WARRANT SHALL BE CONSTRUED AND
ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY,
THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF
LAWS.

         Section 6.8 Judicial Proceedings; Waiver of Jury. Any judicial
proceeding brought against the Trust, the Trustee or the Warrant Agent with
respect to this Warrant Agent Agreement may be brought in any court of competent
jurisdiction in the County of New York, State of New York or of the United
States of America for the Southern District of New York and, by execution and
delivery of the Call Warrants, the Trustee on behalf of the Trust and the
Warrant Agent (a) accept, generally and unconditionally, the nonexclusive
jurisdiction of such courts and any related appellate court, and irrevocably
agree that the Trust, the Trustee and the Warrant Agent shall be bound by any
judgment rendered thereby in connection with this Warrant Agent Agreement or the
Call Warrants, subject to any rights of appeal, and (b) irrevocably waive any
objection that the Trust or the Trustee, the Warrant Agent may now or hereafter
have as to the venue of any such suit, action or proceeding brought in such a
court or that such court is an inconvenient forum.

         Section 6.9 Nonpetition Covenant; No Recourse. Each of (i) the holder
of the Call Warrants by its acceptance thereof, and (ii) the Warrant Agent
agrees, that it shall not (and, in the case of the holder, that it shall not
direct the Warrant Agent to), until the date which is one year and one day after
the payment in full of the Certificates and all other securities issued by the
Trust, the Depositor or entities formed, established or settled by the
Depositor, acquiesce, petition or otherwise invoke or cause the Trust, the
Depositor, or any such other entity to invoke the process of the United States
of America, any State or other political subdivision thereof or any entity
exercising executive, legislative, judicial, regulatory or administrative
functions of or pertaining to government for the purpose of commencing or
sustaining a case by or against the Trust, the Depositor or any such other
entity under a federal or state bankruptcy, insolvency or similar law or
appointing a receiver, liquidator, assignee, trustee, custodian, sequestrator or
other similar official of the Trust, the Depositor or any such other entity or
all or any part of the property or assets of Trust, the Depositor or any such


                                      C-10
<PAGE>

other entity or ordering the winding up or liquidation of the affairs of the
Trust, the Depositor or any such other entity.


















                                      C-11
<PAGE>

                  Each of (i) the holder of the Call Warrants, by its acceptance
thereof, and (ii) the Warrant Agent agrees, that it shall not have any recourse
to the Certificates.

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         not in its individual
                                         capacity but solely as
                                         Trustee and Authenticating Agent


                                    By:_____________________________________
                                        Authorized Signatory

                                    U.S. BANK TRUST NATIONAL ASSOCIATION,
                                         as Warrant Agent


                                    By:_____________________________________
                                        Authorized Signatory





                                      C-12
<PAGE>

                                                                       EXHIBIT D
                                                                       ---------

                            FORM OF INVESTMENT LETTER

                          QUALIFIED INSTITUTIONAL BUYER

                                                              Dated:

U.S. Bank Trust National Association,
100 Wall Street
New York, New York 10005

Lehman Brothers Inc.
  as Initial Purchaser
3 World Financial Center
New York, New York 10285

Lehman ABS Corporation
3 World Financial Center
New York, New York  10285

Ladies and Gentlemen:

                  In connection with our proposed purchase of $___________
aggregate principal amount of Call Warrants (the "Call Warrants") representing
an interest in the Corporate Backed Trust Certificates Series 2001-23 Trust (the
"Trust"), the investor on whose behalf the undersigned is executing this letter
(the "Purchaser") confirms that:

                  (i) Reference is made to the Prospectus Supplement, dated May
[ ], 2001 (the "Prospectus Supplement"), with respect to the Certificates to
which the Call Warrants relate. Capitalized terms used herein that are not
otherwise defined shall have the meanings ascribed thereto in the Prospectus
Supplement. The Purchaser has received a copy of the Prospectus Supplement and
such other information as the Purchaser deems necessary in order to make its
investment decision and the Purchaser has been provided the opportunity to ask
questions of, and receive answers from, the Depositor and the Underwriters,
concerning the terms and conditions of the offering described in the Prospectus
Supplement. The Purchaser has received and understands the above, and
understands that substantial risks are involved in an investment in the Call
Warrants. The Purchaser represents that in making its investment decision to
acquire the Call Warrants, the Purchaser has not relied on representations,
warranties, opinions, projections, financial or other information or analysis,
if any, supplied to it by any person, including you, the Depositor or the
Trustee or any of your or their affiliates, except as expressly contained in the
Prospectus Supplement and in the other written information, if any, discussed
above. The Purchaser has such knowledge and experience in financial and business
matters as to be capable of evaluating the merits and risks of an investment in
the Call Warrants, and the Purchaser is able to bear the substantial economic
risks of such an investment. The Purchaser has relied upon its own tax, legal


                                      D-1
<PAGE>

and financial advisors in connection with its decision to purchase the Call
Warrants.

                  (ii) The Purchaser is (A) a "Qualified Institutional Buyer"
(as defined in Rule 144A under the Securities Act of 1933, as amended (the "1933
Act")) and has delivered to you a certificate substantially in the form attached
hereto as Annex I or Annex 2, as applicable and (B) acquiring the Call Warrants
for its own account or for the account of an investor of the type described in
clause (A) above as to each of which the Purchaser exercises sole investment
discretion. The Purchaser is purchasing the Call Warrants for investment
purposes and not with a view to, or for, the offer or sale in connection with, a
public distribution or in any other manner that would violate the 1933 Act or
the securities or blue sky laws of any state.

                  (iii) The Purchaser understands that the Call Warrants have
not been and will not be registered under the 1933 Act or under the securities
or blue sky laws of any state, and that (i) if it decides to resell, pledge or
otherwise transfer any Call Warrant, such Call Warrant may be resold, pledged or
transferred without registration only to an entity that has delivered to the
Depositor and the Trustee a certification that it is a Qualified Institutional
Buyer that purchases (1) for its own account or (2) for the account of such a
Qualified Institutional Buyer, that is, in either case, aware that the resale,
pledge or transfer is being made in reliance on said Rule 144A and (ii) it will,
and each subsequent holder will be required to, notify any purchaser of any Call
Warrant from it of the resale restrictions referred to in clause (i) above.

                  (iv) The Purchaser understands that each of the Call Warrants
will bear a legend to the following effect, unless otherwise agreed by the
Depositor and the Trustee:

                  "THIS CALL WARRANT HAS NOT BEEN REGISTERED UNDER THE
                  SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE
                  TRANSFERRED, SOLD OR OTHERWISE DISPOSED OF EXCEPT WHILE A
                  REGISTRATION UNDER SUCH ACT IS IN EFFECT OR PURSUANT TO AN
                  EXEMPTION THEREFROM UNDER SUCH ACT. THIS CALL WARRANT
                  REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN COMPLIANCE WITH
                  THE CONDITIONS SPECIFIED IN THIS CALL WARRANT."

                  (v) The Purchaser understands that no subsequent transfer of
the Call Warrants is permitted unless it causes its proposed transferee to
provide to the Depositor and the Initial Warrant Holder a letter substantially
in the form of Exhibit D to the Series Supplement, as applicable, or such other
written statement as the Depositor shall prescribe.



                                      D-2
<PAGE>

                  (vi) The Purchaser agrees that if at some time in the future
it wishes to transfer or exchange any of the Call Warrants, it will not transfer
or exchange any of the Call Warrants unless such transfer or exchange is in
accordance with Section 5.04 of the Trust Agreement. The Purchaser understands
that any purported transfer of the Call Warrants (or any interest therein) in
contravention of any of the restrictions and conditions in the Trust Agreement,
as applicable, shall be a void, and the purported transferee in such transfer
shall not be recognized by the Trust or any other Person as a Warrantholder, as
the case may, be for any purpose.












                                      D-3
<PAGE>

                  You and the Trustee are entitled to rely upon this letter and
are irrevocably authorized to produce this letter or a copy hereof to any
interested party in any administrative or legal proceeding or official inquiry
with respect to the matters covered hereby.

                               Very truly yours,



                               By:      ____________________________
                                        Name:
                                        Title:

                               [Medallion Stamp to be affixed here]











                                      D-4