14In section 550, after subsection (5) (which refers to two or more chargeable events which are the occurrence of excesses under section 546) insert—
“(5A)For the purposes of this section, a chargeable event by virtue of section 546C(7)(a)—
(a)shall be treated as being such a chargeable event as is mentioned in subsection (5) above; and
(b)accordingly, in computing any number of complete years, shall be treated as happening at the end of the year (within the meaning given by section 546(4)) as at which occurs the excess that gives rise to it.”.