SEC. 4. Section Five of the same Act is hereby amended to read as follows:
"SEC. 5. Resolution to incur indebtedness and issue bonds; their conditions, privileges, and exemptions; sinking funds; guaranty.&mdashWhenever the Board may deem it necessary for the Authority to incur indebtedness or issue bonds, it shall by resolution so declare and state the purpose for which the proposed debt is to be incurred and the conditions of such indebtedness. In order that such resolution be valid, it shall be passed by the affirmative vote at least three members of the Board and approved by the Secretary of Finance.
"Subject to the approval of the Secretary of Finance, the Board of Directors may issue bonds under stipulated terms and conditions consisting of: (1) the total amount to be issued, (2) the maturity of the issue, (3) the coupon rate or the stipulated rate of interest, (4) the offering price, (5) the relative ranking in seniority of the particular bond issue with other obligations of the authority and (6) the redemption schedule of such bonds. Any bonds issued by the authority are hereby declared exempt from taxation by the Government of the Republic of the Philippines, or by any authority, branch, division or political subdivision thereof, which fact shall be stated upon the face of said bonds. The bonds shall be receivable as security in any transaction with the Government of the Republic of the Philippines in which such security is required.
"A sinking fund shall be created for each individual bond issue so authorized by the board and approved by the Secretary of Finance in such a manner that yearly contributions together with anticipated earnings on the accumulated funds shall be sufficient to retire the bond issue concerned at maturity. The sinking fund shall be under the custody of the fiscal agent of the Philippine Government which shall invest the same either in the reacquisition of such outstanding bonds in the open market, the retirement of such bonds prior to maturity according to the predetermined schedule or in such manner as the Monetary Board and the Secretary of Finance may approve in accordance with Act Numbered Three Thousand Fourteen, and shall grant to the same the interest on investment and other incomes accruing to it.
"The Government of the Republic of the Philippines hereby guarantees the payment by the National Waterworks and Sewerage Authority of both the principal a the interest of the indebtedness incurred or bonds issued by said Authority by virtue of this Act, and shall pay such principal and interest in case the said Authority fails to do so, and there are hereby authorized to be appropriated, of any funds in the National Treasury not otherwise appropriated, the sums necessary to make the payments guaranteed by this Act: Provided That the sums so paid by the Government of the Republic of the Philippines shall be refunded by the National Waterworks and Sewerage Authority."
"The President of the Philippines is hereby authorized to guarantee, absolutely and unconditionally, as primary obligor and not as surety merely, in the name and on behalf of the Republic of the Philippines, the payment of the indebtedness authorized under this Act, as well as the performance of all or any of the obligations undertaken by the National Waterworks and Sewerage Authority in the territory of the Republic of the Philippines pursuant to loan agreements entered into with any international lending or financial institutions."