The Secretary of State may by order provide that relevant subordinate legislation applies to the Crown.
The order may modify such subordinate legislation to the extent that the Secretary of State thinks appropriate for the purposes of its application to the Crown.
Relevant subordinate legislation is an instrument which—
is made under or (wholly or in part) for the purposes of any of the planning Acts,
is made before the commencement of section 79 of this Act, and
is specified in the order.