4.—Where, in the financial year ending on the 31st day of March, 1967, or any subsequent financial year supply is granted by Dáil Éireann—
(a) for a supply service for the year, being a service for which a sum was not appropriated in the Appropriation Act of the immediately preceding financial year, or
(b) for a supply service of the next following financial year,
the Minister may issue out of the Central Fund in the year for which the supply is granted, and apply towards making good the supply, sums not exceeding in the aggregate the amount of the grant.