5.—(1) Payment to the Commissioners of the charges due under regulation 4 must be made by or on behalf of the producer within the time specified in the relevant verification scheme.
(2) The Commissioners shall determine charges with the aim of cost recovery on a financial year basis for each verification scheme and shall specify the details of those charges in the relevant verification scheme.
(3) Charges levied under regulation 4 must not exceed such amount as the Commissioners consider will enable them to meet any expenses reasonably incurred by them in carrying out the verification.
(4) Payment under paragraph (1) must be made by an approved method of communication.