4(1)This paragraph applies where—
(a)a capital payment is made by the trustees of a settlement on or after 6th April 1992,
(b)the payment is made in a year of assessment for which section 80 applies to the settlement or in circumstances where section 81(2) treats chargeable gains as accruing in respect of the payment,
(c)the whole payment is matched with a qualifying amount of the settlement for a year of assessment falling at some time before that immediately preceding the one in which the payment is made, and
(d)a beneficiary is charged to tax in respect of the payment by virtue of section 80 or 81(2).
(2)The tax payable by the beneficiary in respect of the payment shall be increased by the amount found under sub-paragraph (3) below, except that it shall not be increased beyond the amount of the payment; and an assessment may charge tax accordingly.
(3)The amount is one equal to the interest that would be yielded if an amount equal to the tax which would be payable by the beneficiary in respect of the payment (apart from this paragraph) carried interest for the chargeable period at the rate of 10 per cent. per annum.
(4)The chargeable period is the period which—
(a)begins with the later of the two days specified in sub-paragraph (5) below, and
(b)ends with 30th November in the year of assessment following that in which the capital payment is made.
(5)The two days are—
(a)1st December in the year of assessment following that for which the qualifying amount mentioned in sub-paragraph (1)(c) above is the qualifying amount, and
(b)1st December falling six years before 1st December in the year of assessment following that in which the capital payment is made.
(6)The Treasury may by order substitute for the percentage specified in sub-paragraph (3) above (whether as originally enacted or as amended at any time under this sub-paragraph) such other percentage as they think fit.
(7)An order under sub-paragraph (6) above may provide that an alteration of the percentage is to have effect for periods beginning on or after a day specified in the order in relation to interest running for chargeable periods beginning before that day (as well as interest running for chargeable periods beginning on or after that day).
(8)An order under sub-paragraph (6) above shall be made by statutory instrument subject to annulment in pursuance of a resolution of the House of Commons.