32.—(1) Where the Department makes a subsequent decision in relation to a maintenance calculation to which regulation 31(1) applies, the amount of child support maintenance payable by the non-resident parent shall be—
(a)where the subsequent decision amount is more than the calculation amount, the transitional amount plus the difference between the calculation amount and the subsequent decision amount;
(b)where the subsequent decision amount is less than the calculation amount but more than the transitional amount, the transitional amount; or
(c)where the subsequent decision amount is less than the calculation amount and less than or equal to the transitional amount, the subsequent decision amount.
(2) Regulation 31(2) shall apply to cases where there has been a subsequent decision as if references to the transitional amount were to the amount resulting from the application of paragraph (1).