529 Giving effect to allowances and chargesU.K.
(1)If a person who is entitled or liable to an allowance or charge for a chargeable period was carrying on a Schedule A business at any time in that period, the allowance or charge is to be given effect in calculating the profits of that business, by treating—
(a)the allowance as an expense of that business, and
(b)the charge as a receipt of that business.
(2)If a person who is entitled or liable to an allowance or charge for a chargeable period was not carrying on a Schedule A business at any time in that period, the allowance or charge is to be given effect by treating him as if he had been carrying on such a business in that period and as if—
(a)the allowance were an expense of that business, and
(b)the charge were a receipt of that business.