Regulations made by virtue of this section with the consent of the Treasury may provide that where an order is made under—
sections 107, 115, 117, 279 and 280 shall have effect subject, in such cases as may be prescribed, to such modifications as may be prescribed.
Any such regulations may make provision—
and may also make different provision for different cases ....
No such regulations shall be made by the Secretary of State unless a draft of the instrument is laid before and approved by a resolution of each House of Parliament.
Before making any such regulations the Secretary of State or (as the case may be) the Welsh Ministers shall consult such persons as appear to him or them to be representative—