13(1)This paragraph applies where before the relevant date any person proposes to take steps for enforcing a planning control in the case of such works or such a use as is mentioned in section 251(1).S
(2)Subject to sub-paragraph (4), unless a compliance determination application has been made in relation to the land which has not been finally determined, that person shall serve on every owner and occupier of the land not less than 28 days’ notice of the proposal, and if within that period any person makes such an application in relation to the land and within 7 days of making it serves on the person proposing to take steps as aforesaid notice that the application has been made, no steps for enforcing the control shall be taken until the final determination of the application.
(3)If such an application has been made which has not been finally determined, no such steps shall be taken until the final determination of it.
(4)No notice shall be required under sub-paragraph (2) if steps for enforcing a planning control in the case of any works on land are begun within 28 days of the final determination of a compliance determination application in relation to the land.
(5)For the purpose of this paragraph a compliance determination application shall be treated as having been finally determined notwithstanding that a subsequent application may be made under paragraph 9.