Any power of the Secretary of State to make an order under any provision of this Act shall be exercisable by statutory instrument.

An order made by the Secretary of State under any provision of this Act may be varied or revoked by a subsequent order made under that provision.

Subject to subsection (4) below, a statutory instrument containing an order made under any of the preceding provisions of this Act shall be subject to annulment in pursuance of a resolution of either House of Parliament.

Subsection (3) above shall not apply to an order made under any of sections 7, 46, 59, 64 or 78 of this Act