99Husband and wife
(1)Where —
(a)gains accrue to a woman in a year of assessment during which she is a married woman living with her husband, and
(b)if her chargeable amount were added to, and constituted the highest part of, her husband’s chargeable amount for the year, capital gains tax would be chargeable on it or any part of it at a rate equivalent to the higher rate of income tax for the year,
the rate of capital gains tax on her chargeable amount or that part of it shall be equivalent to the higher rate.
(2)For the purposes of this section a person’s chargeable amount for a year of assessment is the amount on which he is (or would apart from section 45 of the [1979 c. 14.] Capital Gains Tax Act 1979 be) chargeable to capital gains tax for the year.
(3)In relation to a year of assessment for which an application under section 45(2) of the Capital Gains Tax Act 1979 (separate assessment) has effect, the amounts of tax payable by the husband and by the wife shall be determined by—
(a)aggregating the amounts that would be payable by each of them apart from this subsection, and
(b)dividing that aggregate between them in proportion to their chargeable amounts for the year.
(4)This section shall apply in relation to a part of a year of assessment, being a part beginning with 6th April, as it applies in relation to a whole year (except that references to a husband’s chargeable amount are references to his chargeable amount for the whole year).
(5)This section shall have effect for the years 1988-89 and 1989-90 only.