6(1)For section 267(1) proviso of the Income Tax Act 1952 there shall be substituted:—
“Provided that no balancing allowance or balancing charge shall be made by reason of any event occurring more than twenty-five years (or, where the expenditure was incurred before 6th November 1962, fifty years) after the building or structure was first used.”
(2)For section 267(4) of the [1952 c. 10.] Income Tax Act 1952 there shall be substituted:—
“(4)Where a balancing charge falls to be made on a person, and any part of the relevant period (as denned for purposes of this subsection) is not comprised in a chargeable period for which a writing down allowance or scientific research allowance has been made to him or its basis period, the amount on which the balancing charge is to be made shall be reduced in the proportion which the part or parts that are so comprised bear to the whole of the relevant period.
In this subsection ' the relevant period ' means the period beginning when the building or structure was first used for any purpose and ending—
(a)if the event giving rise to the balancing charge occurs on the last day of a chargeable period or its basis period, with that day; or
(b)if not, with the latest date before that event which is the last day of a chargeable period or its basis period :
Provided that where, before the said event (but not before the appointed day), the building or structure has been sold while an industrial building or structure, the relevant period shall begin with the day following that sale or, if there has been more than one such sale, the last such sale.”
(3)In section 267(6) of the Income Tax Act 1952 (which restricts a balancing charge by reference to the total of the allowances made to the person chargeable, exclusive of any investment allowance) for the words " for years of assessment his basis periods for which end on or before the date of the event which gives rise to the charge " there shall be substituted the words " for chargeable periods which end on or before the date of the event giving rise to the charge or of which the basis periods end on or before that date. "
(4)In section 323(3) of the Income Tax Act 1952 (under which a balancing allowance for the last year of assessment of a trade may in special cases be carried back to earlier years) for the words from " so, however," onwards there shall be substituted the words " so, however, that allowances shall not be given by virtue of this subsection for periods together amounting to more than five years (inclusive of any period for which an allowance might be made but cannot be given effect for want of profits or gains) otherwise than by giving a proportionately reduced allowance for a chargeable period of which part is required to make up the five years. "
(5)In the case of a company no allowance shall be given by virtue of section 323(3) of the Income Tax Act 1952 so as to create or augment a loss in any accounting period; and where on a company ceasing to carry on a trade a claim is made both under the said section 323(3) and under section 59 of this Act the allowance for which the claim is made under section 323(3) shall be disregarded for purposes of the claim under section 59, but effect shall be given to the claim under section 59 in priority to the claim under section 323(3).
(6)In Schedule 19 to the [1952 c. 10.] Income Tax Act 1952, in paragraph 6(1) (which adjusts the effect on certain other reliefs of a balancing allowance reduced by the fraction specified in section 267(4)) for the words " the same fraction, and the same fraction only, of the " there shall be substituted the words " only a proportionately reduced. "