Section 5
SEC. 5. A sinking fund is hereby created for the payment of the National Government bonds issued under the provisions hereof in such manner that the total contributions thereto, accrued as at such rate of interest as may be determined by the Secretary of Finance in consultation with the Monetary Board, shall be sufficient to redeem at maturity the said bonds. The said fund shall be under the custody of the Central Bank of the Philippines which shall invest the same in such manner as the Monetary Board may approve; shall charge all expenses of such investment to the said sinking fund, and shall credit the same with the interest on investments and other incomes belonging to it.