46.—(1) Where—
(a)an employer has not paid an amount of repayments to the collector under regulation 39, and
(b)the inspector makes a determination of the amount of such repayments under regulation 45, and
(c)repayments are payable pursuant to that determination,
the repayments so payable shall carry interest at the applicable rate under section 178 of the Finance Act 1989 for the purposes of section 86 of the 1970 Act from the 14th day after the end of the year of assessment in which they are payable until payment.
(2) Interest payable under this regulation shall be recoverable as if it were an amount which the employer is liable to pay under regulation 39.