Commentary on Sections Overview Overview Section 227: Application of Chapter
927.This section sets out the circumstances in which an adjustment may arise. It is based on section 64 of FA 2002.
928.Section 64 of FA 2002 refers to a change of the basis on which profits are calculated. This might mean any change of basis. But paragraph 3(2) of Schedule 22 to FA 2002 makes clear that it does not include a change which occurs on a change of ownership of a trade.
929.The trading income rules in this Part are generally “person-based”. So this section applies when a person changes the basis. That person must be the same before and after the change of basis. So this section reproduces the effect of paragraph 3(2) of Schedule 22 to FA 2002.
930.An adjustment has to be made if:
	the “old basis” accorded with the law or practice at the time; and
	the “new basis” accords with the current law and practice.
931.The difference in wording is to cater for a case in which a decision of the Courts makes it clear that a previously accepted view of the law was wrong. In that case, the old basis accorded with the practice but not the law. The 1998 rules did not cater for this. But the 2002 rules (and the rules in this Chapter) do.
932.Section 64(1)(a) of FA 2002 refers to “a change of basis in computing the profits for the purposes of Case I or II of Schedule D”. So the change of basis rules are “rules applicable to Cases I and II of Schedule D” (section 65(3) of ICTA) and apply to foreign trade profits assessed under Schedule D Case V.
933.This conclusion is reinforced by the fact that, if the adjustment is negative, any relief under paragraph 5 of Schedule 22 to FA 2002 is given by way of “a deduction in computing profits”.
934.The section refers to “a trade”. So the rules apply to trades carried on wholly outside the United Kingdom as they apply to trades carried on at least partly in the United Kingdom.
935.There is a transitional rule in paragraph 59 of Schedule 2 to this Act. An adjustment arising from a change of accounting basis before 6 April 1999 is not charged to tax if the recipient was born before 6 April 1917.