Document:

CWABS ASSET-BACKED CERTIFICATES TRUST 2004-BC4,

                                     Issuer

                                  CWABS, INC.,

                                    Depositor

                          COUNTRYWIDE HOME LOANS, INC.,

                                     Seller

                      COUNTRYWIDE HOME LOANS SERVICING LP,

                                 Master Servicer

                                       and

                              THE BANK OF NEW YORK,

                                     Trustee

                        ---------------------------------

                           AMENDMENT NO. 1 dated as of
                              April 19, 2005 to the

                         POOLING AND SERVICING AGREEMENT

                           Dated as of October 1, 2004

                        ---------------------------------

                   ASSET-BACKED CERTIFICATES, SERIES 2004-BC4

<PAGE>

                  AMENDMENT NO. 1 dated as of April 19, 2005, among CWABS, Inc.,
a Delaware corporation (the "Depositor"), Countrywide Home Loans, Inc., a New
York corporation (the "Seller"), Countrywide Home Loans Servicing LP, a Texas
limited partnership (the "Master Servicer") and The Bank of New York, a New York
banking corporation (the "Trustee").

                              Preliminary Statement
                              ---------------------

         The Depositor, the Trustee, the Seller and the Master Servicer entered
into a Pooling and Servicing Agreement (the "Agreement"), dated as of October 1,
2004, relating to the issuance of Asset-Backed Certificates, Series 2004-BC4.
The Depositor, the Trustee, the Seller and the Master Servicer desire to amend
the terms of the Agreement to add Fannie Mae representations pursuant to and in
accordance with Section 10.01 of the Agreement.

         In consideration of the mutual premises and agreements herein, the
Depositor, the Trustee, the Seller and the Master Servicer agree as follows:

1.       Capitalized terms not defined herein have the meanings assigned to them
         in the Agreement.

2.       Section 1.01 is hereby amended to add the following:

         "BALLOON MORTGAGE LOAN: Any Mortgage Loan having an original term to
maturity that is shorter than the term of the related amortization schedule."

3.       Article II is hereby amended to delete Sections 2.03(b)(lix) through
         2.03(b)(lxiii) in their entirety and to add the following:

         (lix) Each Mortgage Loan is in compliance with the anti-predatory
         lending eligibility for purchase requirements of Fannie Mae's Selling
         Guide.

         (lx) No Mortgage Loan is subject to the Home Ownership and Equity
         Protection Act of 1994.

         (lxi) No Mortgage Loan is a "high cost home loan" as defined in the
         Georgia Fair Lending Act, as amended. No Mortgage Loan with a principal
         balance at origination (or modification) equal to or less than the
         mortgage loan balance limit of Fannie Mae in effect at the time of
         origination (or modification) and secured by owner-occupied real
         property located in the State of Georgia was originated (or modified)
         on or after October 1, 2002 through and including March 6, 2003.

         (lxii) No Mortgage Loan is a "High-Cost Home Loan" as defined in New
         York Banking Law 6-1.

         (lxiii) No Mortgage Loan is a "High-Cost Home Loan" as defined in the
         Arkansas Home Loan Protection Act effective July 16, 2003 (Act 1340 of
         2003).

                                       i
<PAGE>

         (lxiv) No Mortgage Loan is a "High-Cost Home Loan" as defined in the
         Kentucky high-cost home loan statute effective June 24, 2003 (Ky. Rev.
         Stat. Section 360.100).

         (lxv) No Mortgage Loan is a "High-Cost Home Loan" as defined in the New
         Jersey Home Ownership Act effective November 27, 2003 (N.J.S.A.
         46:10B-22 et seq.).

         (lxvi) No Mortgage Loan is a "High-Cost Home Loan" as defined in the
         New Mexico Home Loan Protection Act effective January 1, 2004 (N.M.
         Stat. Ann. ss.ss. 58-21A-1 et seq.).

         (lxvii) No Mortgage Loan is a "High-Risk Home Loan" as defined in the
         Illinois High-Risk Home Loan Act effective January 1, 2004 (815 Ill.
         Comp. Stat. 137/1 et seq.).

         (lxviii) No Mortgage Loan is a "High-Cost Home Mortgage Loan" as
         defined in the Massachusetts Predatory Home Loan Practices Act,
         effective November 7, 2004 (Mass. Ann. Laws Ch. 183C).

         (lxix) No Mortgage Loan is a "High Cost Home Loan" as defined in the
         Indiana Home Loan Practices Act, effective January 1, 2005 (Ind. Code
         Ann. Sections 24-9-1 through 24-9-9).

         (lxx) No Mortgage Loan is a Balloon Mortgage Loan that has an original
         stated maturity of less than seven (7) years.

         (lxxi) No borrower was encouraged or required to select a Mortgage Loan
         product offered by the Mortgage Loan's originator which is a higher
         cost product designed for less creditworthy borrowers, unless at the
         time of the Mortgage Loan's origination, such borrower did not qualify
         taking into account credit history and debt-to-income ratios for a
         lower-cost credit product then offered by the Mortgage Loan's
         originator or any affiliate of the Mortgage Loan's originator. If, at
         the time of loan application, the borrower may have qualified for a
         lower-cost credit product than offered by any mortgage lending
         affiliate of the Mortgage Loan's originator, the Mortgage Loan's
         originator referred the borrower's application to such affiliate for
         underwriting consideration.

         (lxxii) The methodology used in underwriting the extension of credit
         for each Mortgage Loan employs objective mathematical principles which
         relate the borrower's income, assets and liabilities to the proposed
         payment and such underwriting methodology does not rely on the extent
         of the borrower's equity in the collateral as the principal determining
         factor in approving such credit extension. Such underwriting
         methodology confirmed that at the time of origination
         (application/approval) the borrower had a reasonable ability to make
         timely payments on the Mortgage Loan.

         (lxxiii) The information set forth in the Prepayment Charge Schedule
         with respect to each Mortgage Loan is complete, true and correct in all
         material respects at the date or dates respecting which such
         information is furnished and each Prepayment Charge is permissible and
         enforceable in accordance with its terms under applicable law upon the
         Mortgagor's full and voluntary principal prepayment (except to the
         extent that: (1) the enforceability thereof may be limited by
         bankruptcy, insolvency, moratorium,

                                       ii

<PAGE>

         receivership and other similar laws relating to creditors' rights
         generally; or (2) the collectibility thereof may be limited due to
         acceleration in connection with a foreclosure or other involuntary
         prepayment). With respect to any Mortgage Loan that contains a
         provision for a Prepayment Charge: (i) prior to such loan's
         origination, the borrower agreed to such Prepayment Charge in exchange
         for a monetary benefit, including but not limited to a rate or fee
         reduction, (ii) prior to such loan's origination, the borrower was
         offered the option of obtaining a mortgage loan that did not require
         payment of a Prepayment Charge, (iii) the Prepayment Charge is
         disclosed to the borrower in the loan documents pursuant to applicable
         state and federal law, (iv) for Mortgage Loans originated on or after
         September 1, 2004, the duration of the prepayment period shall not
         exceed three (3) years from the date of the Note, unless the Mortgage
         Loan was modified to reduce the prepayment period to no more than three
         years from the date of the Note and the borrower was notified in
         writing of such reduction in prepayment period, and (v) notwithstanding
         any state or federal law to the contrary, the Master Servicer shall not
         impose such Prepayment Charge in any instance when the mortgage debt is
         accelerated as the result of the borrower's default in making the loan
         payments.

         (lxxiv) No borrower was required to purchase any single premium credit
         insurance policy (e.g., life, mortgage, disability, accident,
         unemployment, or health insurance product) or debt cancellation
         agreement as a condition of obtaining the extension of credit. No
         borrower obtained a prepaid single-premium credit insurance policy
         (e.g., life, mortgage, disability, accident, unemployement, or health
         insurance product) or debt cancellation agreement in connection with
         the origination of the Mortgage Loan. No proceeds from any Mortgage
         Loan were used to purchase single premium credit insurance policies or
         debt cancellation agreements as part of the origination of, or as a
         condition to closing, such Mortgage Loan.

         (lxxv) All points and fees related to each Mortgage Loan were disclosed
         in writing to the borrower in accordance with applicable state and
         federal law and regulation. Except in the case of a Mortgage Loan in an
         original principal amount of less than $60,000 which would have
         resulted in an unprofitable origination, no borrower was charged
         "points and fees" (whether or not financed) in an amount greater than
         5% of the principal amount of such loan, such 5% limitation is
         calculated in accordance with Fannie Mae's anti-predatory lending
         requirements as set forth in the Fannie Mae Selling Guide.

         (lxxvi) All fees and charges (including finance charges) and whether or
         not financed, assessed, collected or to be collected in connection with
         the origination and servicing of each Mortgage Loan has been disclosed
         in writing to the borrower in accordance with applicable state and
         federal law and regulation.

         (lxxvii) No Mortgage Loan is a High Cost Loan or Covered Loan, as
         applicable (as such terms are defined in Standard & Poor's LEVELS(R)
         Glossary, Version 5.6 Revised, Appendix E, attached hereto as Exhibit
         U) and no Mortgage Loan originated on or after October 1, 2002 through
         March 6, 2003 is governed by the Georgia Fair Lending Act.

4.       Article II is hereby amended to add the following:

                                       iii
<PAGE>

         "Section 3.21 CREDIT REPORTING.

         The Master Servicer will transmit full-file credit reporting data for
each Mortgage Loan pursuant to Fannie Mae Guide Announcement 95-19 and, with
respect to each Mortgage Loan, the Master Servicer agrees it shall report one of
the following statuses each month as follows: new origination, current,
delinquent (30-, 60-, 90-days, etc.), foreclosed, or charged-off."

                                       iv
<PAGE>

         IN WITNESS WHEREOF, the Depositor, the Master Servicer, the Seller and
the Trustee have caused their names to be signed hereto by their respective
officers thereunto duly authorized as of the day and year first above written.

                                       CWABS, INC.,
                                       as Depositor

                                       By:  /s/ Ruben Avilez
                                           ------------------------------------
                                       Name:    Ruben Avilez
                                       Title:   Vice President

                                       COUNTRYWIDE HOME LOANS, INC.,
                                       as Seller

                                       By:  /s/ Ruben Avilez
                                           ------------------------------------
                                       Name:    Ruben Avilez
                                       Title:   Vice President

                                       COUNTRYWIDE HOME LOANS
                                       SERVICING LP,
                                       as Master Servicer

                                       By:      COUNTRYWIDE GP, INC.

                                       By:  /s/ Ruben Avilez
                                           ------------------------------------
                                       Name:    Ruben Avilez
                                       Title:   Vice President

                                       THE BANK OF NEW YORK,
                                       not in its individual capacity,
                                       but solely as Trustee

                                       By:  /s/ Maria Tokarz
                                           ------------------------------------
                                       Name:    Maria Tokarz
                                       Title:   Assistant Treasurer

                                       vexv4w1

 

Exhibit 4.1

SECOND AMENDMENT TO RIGHTS AGREEMENT

     AMENDMENT, dated as of May 4, 2005 (this “Amendment”), between Bone Care International Inc., a
Wisconsin corporation (the “Company”), and Wells Fargo Bank, N.A., as successor to Norwest Bank
Minnesota, N.A. (the “Rights Agent”), to the Rights Agreement, dated as of April 15, 1996, as
amended by the First Amendment to Rights Agreement, dated as of September 21, 1999, between the
Company and the Rights Agent (collectively, the “Rights Agreement”).

W I T N E S S E T H :

     WHEREAS, the Company, Genzyme Corporation, a Massachusetts corporation (“Parent”) and Macbeth
Corporation, a Wisconsin corporation and a wholly-owned subsidiary of Parent (“Sub”), have proposed
to enter into an Agreement and Plan of Merger (the “Merger Agreement”) which contemplates, among
other things, that Sub be merged (the “Merger”) with and into the Sub and each common share of the
Company (other than shares held directly or indirectly by Parent or the Company) shall be converted
into the right to receive $33.00;

     WHEREAS, the Company and the Rights Agent desire to amend the Rights Agreement, pursuant to
and in compliance with Section 27 thereof, to provide that none of Parent, Sub or any of their
respective Affiliates (as defined in the Rights Agreement) or Associates (as defined in the Rights
Agreement) shall become an Acquiring Person and no Distribution Date (as such terms are defined in
the Rights Agreement) shall occur as a result of as a result of the execution and delivery of the
Merger Agreement, the public announcement thereof or the consummation of any of the transactions
contemplated by the Merger Agreement

 

 

in accordance with its terms and to provide that the Rights will terminate immediately prior
to the Effective Time (as defined in the Merger Agreement); and

     WHEREAS, the Company and the Rights Agent have each executed and delivered this Amendment
immediately prior to the execution and delivery of the Merger Agreement.

     NOW, THEREFORE, in consideration of the Rights Agreement and the premises and mutual
agreements herein set forth, the parties hereby agree as follows:

     1. There is hereby added to the Rights Agreement new Sections 1(mm) through 1(oo) as follows:

     (mm) “Genzyme” shall mean Genzyme Corporation, a Massachusetts
corporation.

     (nn) “Acquisition Subsidiary” shall mean Macbeth Corporation,
a Wisconsin corporation and a wholly-owned subsidiary of Genzyme.

     (oo) “Merger Agreement” shall mean the Agreement and Plan of
Merger dated as of May 4, 2005, as the same may be amended from time
to time, among Genzyme, Acquisition Subsidiary and the Company.

     2. Section 1(a) of the Rights Agreement is hereby amended by adding the following sentence at
the end thereof:

“Notwithstanding the first sentence of this Section 1(a), none of
Genzyme, Acquisition Subsidiary or any of their respective
Affiliates or Associates shall become an “Acquiring Person” as a
result of the execution and delivery of the Merger Agreement, the
public announcement thereof or the consummation of any of the
transactions contemplated by the Merger Agreement in accordance with
its terms.”

2

 

     3. Section 3(a) of the Rights Agreement is hereby amended by adding the following sentence
immediately following the first sentence thereof:

“Notwithstanding clause (ii) of the preceding sentence, a
Distribution Date shall not occur as a result of the execution and
delivery of the Merger Agreement, the public announcement thereof or
the consummation of any of the transactions contemplated by the
Merger Agreement in accordance with its terms.”

     4. Section 7(a) of the Rights Agreement is hereby restated to read as follows:

“Subject to Section 7(d), the registered holder of any Rights
Certificate may exercise the Rights evidenced thereby (except as
otherwise provided herein), in whole or in part, at any time after
the Distribution Date and prior to the earliest of (i) the Close of
Business on the tenth anniversary of the Record Date, (ii) the time
at which the Rights are redeemed as provided in Section 23 (the
“Redemption Date”), (iii) the time at which such Rights are
exchanged as provided in Section 24, and (iv) immediately prior to
the Effective Time (as such term is defined in the Merger Agreement)
(the earliest of clauses (i), (ii), (iii) and (iv) being referred to
herein as the “Final Expiration Date”), upon surrender of such
Rights Certificate, with the Form of Election to Purchase and
Certification of Status on the reverse side thereof duly executed,
together with such signature guarantees and other documentation as
the Rights Agent may reasonably request, to the Rights Agent at its
principal office, accompanied by payment (as provided in subsection
(c) of this Section 7) of the Exercise Price for each one
one-hundredth of a Preferred Share (or after a Triggering Event, the
securities, cash and other property purchasable in lieu thereof) as
to which the surrendered Rights are then being exercised.”

     5. A new Section 35 with the heading “TERMINATION AT THE EFFECTIVE TIME” is hereby added to
the Rights Agreement, reading in its entirety as follows:

“This Agreement and the Rights established hereby will terminate in
all respects immediately prior to the Effective Time. The Company
hereby agrees to promptly notify the Rights Agent, in writing, upon
the occurrence of the Effective Time, which notice shall specify (i)
that the Effective Time has occurred, and (ii) the date on upon
which this Agreement and the Rights established here were
terminated.”

3

 

     6. This Amendment shall be deemed to be a contract made under the laws of the State of
Wisconsin and for all purposes shall be governed by and construed with in accordance with the laws
of such State applicable to contracts to be made and performed entirely within such State.

     7. This Amendment may be executed in two or more counterparts, each of which shall for all
purposes be deemed to be an original, but all such counterparts shall together constitute one and
the same instrument.

     8. Any capitalized term used herein without definition shall have the meaning specified in the
Rights Agreement.

     9. Except as otherwise expressly set forth herein, this Amendment shall not by implication or
otherwise alter, modify, amend or in any other manner affect any of the terms, conditions,
obligations, covenants or agreements contained in the Rights Agreement, all of which are hereby
ratified and confirmed in all respects and shall continue in full force and effect.

     IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed and
attested, all as of the day and year first above written.

	 	 	 	 	 	 	 
	Attest:	 	BONE CARE INTERNATIONAL, INC.
	 
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	By:

	 	/s/ Brian Hayden
	 	By:
	 	/s/ Paul Berns
	

	 	 
	 	 	 	 
	

	 	Brian Hayden
	 	 	 	Paul Berns
	

	 	Vice President, Chief Financial Officer
	 	 	 	President and Chief Executive Officer
	 
	 	 	 	 	 	 
	Attest:	 	WELLS FARGO BANK, N.A.
	 	 	 	 	AS RIGHTS AGENT
	 
	 	 	 	 	 	 
	 
	 	 	 	 	 	 
	By:

	 	/s/ Beverly A. Robinson
	 	By:
	 	/s/ Peggy Sime
	

	 	 
	 	 	 	 
	Name:

	 	Beverly A. Robinson
	 	 	 	Peggy Sime
	Title:

	 	Vice President
	 	 	 	Officer

4

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