A local planning authority may at any time make proposals for the alteration, repeal or replacement of a local plan adopted by them and may at any time, with the consent of the Secretary of State, make proposals for the alteration, repeal or replacement of a local plan approved by him.
Without prejudice to subsection (1) of this section, a local planning authority shall, if the Secretary of State gives them a direction in that behalf with respect to a local plan adopted by them or approved by him, as soon as practicable prepare proposals of a kind specified in the direction, being proposals for the alteration, repeal or replacement of the plan.
The provisions of sections 11(9) to (11), 12, 13 and 14 of this Act shall apply in relation to the making of proposals for the alteration, repeal or replacement of a local plan under this section, and to alterations to a local plan so proposed, as they apply in relation to the preparation of a local plan under section 11 of this Act and to a local plan prepared thereunder, but as if the reference in section 14(4)(a) to section 9 of this Act were a reference to section 10 of this Act.