(1)If it appears to the Secretary of State that it is expedient that a completion notice should be served in respect of any land, he may himself serve such a notice under section 61.
(2)A completion notice served by the Secretary of State shall have the same effect as if it had been served by the planning authority.
(3)The Secretary of State shall not serve such a notice without consulting the planning authority.
(4)The provisions of this Act relating to completion notices apply, so far as relevant, to a completion notice served by the Secretary of State as they apply to a completion notice served by a planning authority, but with the substitution for any reference in those provisions to the planning authority of a reference to the Secretary of State, and any other necessary modifications.