10.—(1) A beneficiary shall keep any invoice, account or other document relating to an approved operation for the period of six years beginning with the day on which the last payment of financial assistance under these Regulations is made to him in connection with that operation, subject to paragraphs (2) and (3).
(2) If the beneficiary transfers the original of any such document to another person in the normal course of business, he shall instead keep a copy of that document for that period.
(3) Paragraph (1) does not apply if the document has been removed by an authorised person under regulation 9(3)(e).