Appropriation
5.—(1)  In the application of the sums paid in respect of any year under section 2, the amounts specified in the Schedule shall be appropriated to the classes of expenditure specified therein respectively in that year.
(2)  If it appears that the sum appropriated to any class of expenditure in any year will not be wholly required for the expenditure of that class in that year, the amount not so required may, with the approval of the Minister, be applied as an addition to the sum available for any other class.
(3)  The sums to be expended by or on the instructions of the Private Secretary to the President in respect of Classes 2, 3 and 4 of the Schedule for any year shall be expended in that year by the Private Secretary to the President in conformity with the detailed estimates for that year submitted by him to, and approved by, the Minister.