9If, immediately before the appointed day, any sums of money that, by virtue of section 35(2) of the [1961 c. 36.] Finance Act 1961, are subject to be paid into the National Loans Fund are in the hands of the Postmaster General (that is to say, sums received by him from the sale of national savings stamps or gift tokens), the Post Office shall, on that day or as soon as practicable thereafter, pay equivalent sums to the Treasury who shall pay them into that fund; and, if, immediately before that day, any sums are due under the said section 35(2) to the Postmaster General by way of reimbursing him money paid by him in respect of the exchange or encashment of national savings stamps or national savings gift tokens, the Treasury shall, on that day or as soon as practicable thereafter, pay out of that fund equivalent sums to the Post Office.