7.—(1) Subject to paragraph (3), an interim claim for a tax month may be made by a scheme administrator within 6 months after the end of the tax month for which it is made.
(2) A claim under this regulation may not be based on an estimate but may only be made to recover an amount deducted in respect of contributions paid in the tax month.
(3) An interim claim may not be made for the tax month ending 5th October or any subsequent month until the annual claim for the preceding year of assessment has been made by the scheme administrator and received by the Board.
(4) If the amount claimed is established to the Board’s satisfaction they shall pay the amount to the claimant; if they are not so satisfied they shall pay to the claimant any lesser amount established to their satisfaction.
(5) Where a scheme administrator discovers that an amount paid to him under paragraph (4) was excessive he shall bring into account in the interim claim made by him next after the discovery (in this regulation referred to as “the subsequent claim”) the amount of the excess; and if that amount exceeds the amount deducted in respect of the tax month for which the subsequent claim is made —
(a)the scheme administrator shall repay the amount of the excess to the Board with the claim; and
(b)if he fails so to do that amount shall immediately be recoverable by the Board in the same manner as tax charged by an assessment on the scheme administrator which has become final and conclusive.