4.—(1) Where an airport operator proposes to make an application to the Department for a vesting order under Article 3 in respect of any land, a person authorised in writing by the operator may, at any reasonable time, enter the land in order to make a survey for the purpose of determining whether the application should be made.
(2) A person authorised to enter any land under this Article shall not demand to do so as of right unless—
(a)14 days notice of the intended entry has been given to the occupier; and
(b)if required to do so, he has produced evidence of his authority.
(3) Any person who intentionally obstructs a person acting in the exercise of a power conferred by this Article shall be guilty of an offence and liable on summary conviction to a fine not exceeding level 3 on the standard scale.