Regulation 5
Where—
by reason of a reduction of an assessment to the special charge the amount of the special charge payable by the person originally chargeable is reduced, and
the person originally chargeable has recovered any part of the special charge from the person answerable for a trust, under paragraph 3 of Schedule 15,
the person answerable for the trust shall be entitled to repayment under paragraph (2) of this Regulation of the amount by which the sum recovered from him exceeds the sum that would have been recoverable from him if the assessment had in the first instance been made in the reduced amount.
Where the Board have given a certificate under paragraph 7(3) of Schedule 15 the repayment shall be made by the Board, and the amount repayable to the person originally chargeable shall be reduced accordingly; and in any other case the repayment shall be made by the person originally chargeable.