6.—(1) For the purposes of ascertaining whether in respect of any operation—
(a)any amount of Community aid or of grant under these Regulations is payable or recoverable; or
(b)an offence under these Regulations has been, or is being, committed,
an authorised officer may, on producing, if so required, a warrant of his authority, at any reasonable time enter upon any land to which the operation relates or any land on which relevant documents are being kept.
(2) An authorised officer who has entered any land in accordance with paragraph (1) above may—
(a)inspect that land or any equipment on it to which the operation relates; and
(b)require the applicant to produce for inspection, and allow the officer to make a copy of, or extracts from, and to examine and remove for a reasonable period, any invoice, account or other document relating to that application which is relevant to the purposes mentioned in the said paragraph (1).