An authority responsible for a structure plan shall, where any proposals of theirs for the alteration or replacement of a structure plan are adopted or approved—
notify any authority responsible for a local plan in their area that the proposals have been adopted or approved; and
supply that authority with a statement that the local plan is or, as the case may be, is not in general conformity with the altered or new structure plan.
A statement that a local plan is not in general conformity with a structure plan shall specify the respects in which it is not in such conformity.
An authority responsible for a structure plan shall, where any proposals of theirs for the alteration or replacement of a structure plan are withdrawn, notify any authority responsible for a local plan in their area that the proposals have been withdrawn.
Nothing in this section requires an authority to notify or supply a statement to themselves.
For the purposes of this section an authority shall be regarded as responsible—
for a structure plan, if they are entitled to prepare proposals for its alteration or replacement; and
for a local plan, if they are under a duty to prepare a local plan or are entitled to prepare proposals for its alteration or replacement.