Any power of any Minister or Ministers to make orders, schemes or regulations (other than regulations under section 18(1) of this Act) under this Act shall be exercisable by statutory instrument.

Subject to section 52(1) of this Act and to subsection (3) below any power conferred by this Act to make an order or scheme includes power to vary or revoke the order or scheme by a subsequent order or scheme, as the case may be.

Subsection (2) above shall not apply to an order revoking a scheme under section 7(5) or section 31(4) of this Act or to an order under section 10(2) of this Act.