'Any power to make regulations or give directions conferred by this Part of this Act includes power to make different provision in relation to local authorities or development bodies in England, in Wales and in Scotland.

Any power to make regulations conferred by this Part of this Act shall be exercisable by statutory instrument.

This Part of this Act, except this section, shall come into operation on such day as the Secretary of State may by order made by statutory instrument appoint, and different days may be so appointed for different provisions and for different purposes; and any reference in any provision of this Part of this Act to the appointed day is a reference to the day appointed under this section for the coming into operation of that provision or, if different days are so appointed for different purposes of that provision, the first day so appointed.