16.—(1) An authorised person may, at any reasonable hour, enter any land or premises owned or occupied by an agreement holder, or over which the agreement holder has control, other than a private dwelling, if it is for any of the purposes listed in regulation 15(1)(a) to 15(1)(g) and it is in accordance with paragraphs (2) and (3) of this regulation.
(2) The authorised person must inform the agreement holder of the purpose of the proposed inspection and, where possible, agree a suitable date and time for that inspection.
(3) Where it is not possible to agree a suitable date and time, the authorised person must notify the agreement holder in writing of the purpose of the inspection and the date and time at least 48 hours in advance of that inspection.