13 Alteration of local plans.S
(1)A planning authority shall keep under review any local plan adopted by them, or approved by the Secretary of State, and may at any time make proposals for the alteration, repeal or replacement of that plan.
(2)In complying with subsection (1) the planning authority—
(a)shall have regard to any information and any other considerations which appear to them to be relevant or which may be prescribed, and
(b)shall secure that any proposals conform generally to the structure plan as is stands for the time being, whether or not it has been approved by the Secretary of State.
(3)Any such proposals may include proposals for the repeal of two or more local plans and their replacement with one local plan.
(4)Where a local plan has been approved by the Secretary of State the planning authority shall not make such proposals in relation to that plan without his consent.