s 75 Power of entry on land
75.—(1) Subject to subsection (2), any officer authorised in that behalf by the Authority and any person employed in that behalf under the supervision of that officer may enter upon, survey and take levels of any controlled area and may do all other acts necessary for the survey and for the purpose of marking out the boundaries of the area or any part of that area. (2) The officer or person must not enter into any building or enclosed garden or compound attached to any building without the occupier’s consent unless he or she has previously given the occupier at least 3 clear days’ written notice of his or her intention to do so.[23