1(1)Where the Secretary of State has confirmed an order authorising the Authority to acquire land in Great Britain compulsorily or is considering the confirmation of such an order, any person authorised in writing by the Secretary of State may at all reasonable times, on producing if so required evidence of his authority in that behalf, enter upon any of the land in order to make any survey which the Secretary of State or the Authority requires to be made for the purpose of any steps to be taken in consequence of the order or, as the case may be, for the purpose of determining whether the order should be confirmed; but admission shall not by virtue of this sub-paragraph be demanded as of right to any land which is occupied unless eight days' notice of the intended entry has been served on the occupier.
(2)Where the Authority proposes to acquire land in Northern Ireland compulsorily, any person authorised in writing by the Secretary of State may at all reasonable times, on producing if so required evidence of his authority in that behalf, enter upon any of the land in order to make any survey which the Secretary of State or the Authority requires to be made for the purpose of ascertaining whether the land would be suitable for the purposes for which it is proposed to acquire it; but admission shall not by virtue of this sub-paragraph be demanded as of right to any land which is occupied unless eight days' notice of the intended entry has been served on the occupier.
(3)Subsections (2) to (5) of section 29 of the [1949 c. 67.] Civil Aviation Act 1949 (which contains supplementary provisions relating to entry for the purposes of survey) shall apply with any necessary modifications in relation to the preceding sub-paragraphs as they apply in relation to subsection (1) of that section, but any proceedings for an offence under subsection (2) of that section as so applied may be instituted in England and Wales or Northern Ireland by the Authority without the consent of the Secretary of State or the Director of Public Prosecutions and any compensation payable under subsection (5) of that section as so applied shall be paid by the Authority instead of the Secretary of State.