F2. . . Any person authorised by the Department in writing in that behalf may, on production if required of his credentials, at any reasonable time enter any land for the purpose of gathering information regarding that or any other land for the purposes of this Order.

F3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The occupier or, if the land is not occupied, the person entitled to possession of it shall give such assistance as the person mentioned in paragraph (1) may reasonably require to enter the land or for the purpose mentioned in that paragraph.