Section 8
SEC. 8. Should the receipts accruing under section four be insufficient to service adequately bonds issued under this Act, the sinking fund deficiency shall be made good by the general funds of the municipality or chartered city in such manner that the annual contribution shall be sufficient to redeem at maturity the bonds issued under this Act. The sinking 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 shall approve.