This section applies in relation to the following provisions—
The Secretary of State may by order made by statutory instrument provide that any of those provisions—
and may vary or revoke any of the provisions of sections 281 to 285 above (excluded classes of employment) so far as they relate to any such provision.
Any such order shall be made by statutory instrument and may contains such incidental, supplementary or transitional provisions as appear to the Secretary of State to be necessary or expedient.
No such order shall be made unless a draft of the order has been laid before Parliament and approved by a resolution of each House of Parliament.