8 Annual claims
1 An annual claim for a year of assessment may, subject to paragraph (2), be made at any time within 6 years after the end of the year of assessment.
2 Where in relation to any year of assessment a scheme administrator has received and not repaid in full any amount on an interim claim he shall within 6 months after the end of the year of assessment make an annual claim.
3 A claim under this regulation —
(a) may not be based on an estimate but may only be made to recover an amount deducted in respect of contributions paid in the year of assessment, and
(b) shall bring into account payments made in respect of the year of assessment; and for the purpose of this regulation “aggregate interim payments” means the aggregate of payments made (and not repaid) on interim claims.
4 Where the aggregate interim payments shown by an annual claim exceeds the amount deducted for the year of assessment —
(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.
5 If a scheme administrator fails to make an annual claim under paragraph (2) within the time limited by that paragraph, the Board may issue a notice to the scheme administrator showing the aggregate interim payments for the year, and stating that the Board are not satisfied that the amount due to the scheme administrator for the year of assessment exceeds the lower amount stated in the notice.
6 If an annual claim is not delivered to the Board within 14 days after the issue of a notice under paragraph (5), the amount of the difference between the aggregate amount and the amount stated in the notice 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.
7 Where an annual claim has been made and the scheme administrator subsequently discovers that an error or mistake has been made in the claim the scheme administrator may make a supplementary claim within the time limited by paragraph (1).