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                                                                  EXHIBIT (4)(b)

                           AIG LIFE INSURANCE COMPANY

                                   ENDORSEMENT
                               CANCELLATION OPTION

This Endorsement has been added to and made a part of the Contract to which it
is attached.

This Endorsement allows the Owner the option to surrender the Contract within
[six (6) months] of the Contract Date ("Cancellation Period"). A cancellation
benefit shall be paid in a lump sum to the Owner and shall be due upon Our
receipt of a proper request for implementation of this option, mailed or
delivered to Us at an address We designate. Should the Owner die during the
Cancellation Period, the Annuitant will have the right to exercise this option
for the remainder of the Cancellation Period and would receive the lump sum
payment if the cancellation option is used.

This Endorsement may also be invoked in the event that an Annuitant, or a Joint
Annuitant, if any, dies within [six (6) months] of the Contract Date. The death
benefit shall be due and payable once We receive a notification of death
acceptable to Us. The lump sum benefit will be paid to the Owner, if living, or
if not, to the Beneficiary. No residual benefit would remain once this
cancellation option has been exercised or a death benefit has been paid, and any
such payment shall fully discharge Us from any further liability.

Calculating the Cancellation Value
The amount of the lump sum benefit for a voluntary cancellation will be
determined by calculating the actuarial present value, if any, of future
variable and fixed Annuity Benefits,

     1.   The value of future Variable Annuity Income is calculated by applying
          the Assumed Investment Return factor, and the mortality rates used to
          initially determine annuity payments, to the future Variable Annuity
          Benefits which are to be paid in accordance with the Annuity Income
          Option then remaining and in effect on the exercise date. The future
          Variable Annuity Benefit used in this calculation is determined by
          multiplying the Annuity Unit value next computed after We receive the
          request, or on the date of notification for a death, by the current
          number of Annuity Units for each Subaccount, and summing for all
          Subaccounts.

     2.   The value of future Fixed Annuity Income will be determined by
          applying the then current annuity purchase rates, established in
          accordance with the Fixed Account section of the Contract, to the
          Fixed Annuity Income which is to be paid in accordance with the
          Annuity Income Option then remaining and in effect on the exercise
          date. The current annuity purchase rates we use in calculating the
          benefit will be no more than one percent (1%) greater than or less
          than the interest rate used in originally calculating the stream of
          annuity payments at the Contract Date.

Calculating the Death Benefit Value
Once payments have begun, the amount of the lump sum benefit in consideration of
a death within [six (6) months] of the Contract Date will be determined by
calculating the value of future Variable Annuity Income, if any, as described
above under Calculating the Cancellation Value (Item 1), and adding the net
premium allocated to Fixed Annuity Income, if any, minus any payments already
made.

The lump sum benefit amount, as calculated under this provision, may increase or
decrease in accordance with the methodology as described herein.

We reserve the right to charge a fee for cancellations, which will be deducted
from the lump sum payment at the time a cancellation is effected. Such fee will
be shown on the Contract Schedule.

The effective date of this Endorsement is the Contract Date.

                 SIGNED AT THE HOME OFFICE ON THE CONTRACT DATE.

                                 /s/ RODNEY O. MARTIN, JR.
                                 -------------------------
                                    President

16IVCO0403<PAGE>

                                                                  EXHIBIT (4)(c)

                           AIG LIFE INSURANCE COMPANY

                                   ENDORSEMENT
                         PARTIAL WITHDRAWAL ENDORSEMENT

This Endorsement has been added to and made a part of the Contract to which it
is attached.

This Endorsement allows the Annuitant a limited option to take a partial
withdrawal during what is termed the Guaranteed Period. The Guaranteed Period,
which can equal but never exceed the life expectancy of the Annuitant, or the
joint lives of the Annuitant and Joint Annuitant, if any, is determined by
applicable tables published by the Internal Revenue Service. The Guaranteed
Period is established by reducing that published life expectancy to the nearest
whole number. No partial years will be credited. Annuity payments will be
guaranteed for both Fixed Annuity Income and Variable Annuity Income options
available under the Contract, but the Guaranteed Period for Variable Income
payments may be reduced by partial withdrawals.

A partial withdrawal is subject to the following restrictions:
a)   the minimum partial withdrawal amount shown on the Contract Schedule; and,
b)   the partial withdrawal is restricted to an amount that allows at least five
     (5) years of Guaranteed Period for Variable Income payments to remain in
     the annuity after the withdrawal.
A partial withdrawal will reduce each future Variable Annuity Income payment,
both Guaranteed Period and life contingent, by an equal amount; and will also
reduce the length of the Guaranteed Period for Variable Annuity Income payments.

All partial withdrawals are applicable only to Variable Annuity Income payments.
No Fixed Annuity Income payments may be used in determining withdrawal values,
and neither the amount of Fixed Annuity Income payments nor the Guaranteed
Period for such payments will be affected by partial withdrawals. Transfers from
Variable Annuity Subaccounts to Fixed Annuity Income will diminish the
availability of partial withdrawals.

CALCULATING THE PARTIAL WITHDRAWAL

The partial withdrawal benefit shall be paid in a lump sum to the Annuitant and
shall be due upon Our receipt of a proper request for implementation of this
option, mailed or delivered to Us at an address We designate.

Partial withdrawals will reduce the present value of future Variable Annuity
Income payments during the Guaranteed Period, subject to the restriction that at
least five (5) years of Guaranteed Period remain for Variable Income after the
withdrawal occurs. The present value is calculated by discounting the Variable
Annuity Income payments at the Assumed Investment Return, and with consideration
to any fees charged for a partial withdrawal. The future Variable Annuity Income
payment amount we use in this calculation is determined by multiplying the
Annuity Unit Value next computed after We receive the request by the current
number of Annuity Units for each Subaccount, and summing for all Subaccounts.

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14IVPW0403

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A partial withdrawal will reduce all future Variable Annuity Income payments by
an equal amount, and the remaining length of the Guaranteed Period will also be
reduced. The specific amount by which future Variable Annuity Income payments
and the Guaranteed Period will be reduced is affected by:
1.   the amount of the withdrawal requested;
2.   the Guaranteed Period remaining at the time a withdrawal is requested;
3.   the age and sex of the Annuitant(s); and,
4.   the Form of Annuity.

We will take partial withdrawals from the Subaccounts in which the annuity is
then invested in the same proportion as the value invested in each Subaccount on
the date of the partial withdrawal. We reserve the right to charge a fee for
partial withdrawals, which will be deducted from the lump sum payment at the
time a partial withdrawal is effected. Such fee will be shown on the Contract.

The effective date of this Endorsement is the Contract Date.

                           SIGNED AT THE HOME OFFICE ON THE CONTRACT DATE.

                                           /s/ RODNEY O. MARTIN, JR.
                                           -------------------------
                                              President

                                        2

14IVPW0403CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350

Exhibit 10.1 
 
Certification of the Principal Executive Officer 
Pursuant to 18 U.S.C. Section 1350, 
As Adopted
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 
 
In connection with the Annual Report of Companhia de Saneamento Básico do Estado de São Paulo—SABESP (the “Company”) on Form 20-F for the year ended December 31, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the “Report”), I, Dalmo do Valle Nogueira Filho, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002, that: 
 

	 	(1)	 	The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and 

 

	 	(2)	 	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

	
	 /s/    Dalmo do Valle Nogueira
Filho            

	 Dalmo do Valle Nogueira Filho

	 Chief Executive Officer

	 Dated: June 2, 2003

 
A signed original
of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO 18 U.S.C. SECTION 135

Exhibit 10.2 
 
Certification of the Principal Financial Officer 
Pursuant to 18 U.S.C. Section 1350, 
As Adopted
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 
 
In connection with the Annual Report of Companhia de Saneamento Básico do Estado de São Paulo—SABESP (the “Company”) on Form 20-F for the year ended December 31, 2002 as filed with the Securities and
Exchange Commission on the date hereof (the “Report”), I, Reinaldo José Rodriguez de Campos, Acting Economic and Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that: 
 

	 	(1)	 	The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and 

 

	 	(2)	 	The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

	
	 /s/    Reinaldo José Rodriguez de
Campos            

	 Reinaldo José Rodriguez de Campos

	 Acting Economic and Financial Officer

	 Dated: June 2, 2003

 
A signed original
of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

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