The International Development Association (Fourth Replenishment: Interim Payments) Order 1974
The Overseas Aid Act 1968, section 1(5), provides that if the Government of the United Kingdom becomes bound by arrangements for the making of additional payments to the International Development Association, the Minister of Overseas Development may, with the approval of the Treasury, provide by order for the payment out of moneys provided by Parliament of any sums required by him for any of the purposes specified in that subsection.