The Asian Development Bank (Additional Contributions) Order 1972
The Overseas Aid Act 1968 section 2(1) provides that if the Government of the United Kingdom becomes bound by arrangements for the making of additional contributions to a regional development bank, 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. This power is now exercisable by the Secretary of State.