6.—(1) An authorised person may at all reasonable hours and on producing, if so required, some duly authenticated document showing his authority, exercise the powers specified in this regulation for the purposes of–
(a)carrying out any specified control measure, or
(b)ascertaining whether an offence under these Regulations has been or is being committed.
(2) An authorised person may enter any premises, other than premises used only as a dwelling, which are, or which such person has reasonable cause to believe to be, occupied by, or in the possession of, a farmer or employee, servant or agent of a farmer.
(3) An authorised person who has entered any premises by virtue of this regulation
(a)inspect all or any part of the land farmed, laid fallow or withdrawn from agricultural production by a farmer; and
(b)inspect any crops growing on that land or kept on it.
(4) An auth orised person entering any premises by virtue of this regulation may take with him such other persons as he considers necessary.