(1) During the course of the financial year, the Minister, under the authority of the President, shall review the budget.

(2) Where in the course of the review it is found that the amount of moneys appropriated by the Appropriation Act for any purpose is insufficient or that a need has arisen for expenditure for a purpose for which no sum of money has been appropriated by that Act, supplementary budget estimates showing the sum of money required, shall be laid before Parliament for approval.