Sch 3 para 105 The writing-down period
(1) This paragraph applies where it is provided under Part 9 that writing-down allowances are to be made in respect of any expenditure during a writing-down period of any specified length. (2) If allowances were made under paragraph 27(2) of Schedule 14 to FA 1965— (a) for income tax purposes, for either of the tax years 1964-65 and 1965-66, and (b) for accounting periods of a company falling wholly or partly within either of those years, the periods for which allowances were made are added together in calculating the writing-down period, even though (according to the calendar) the same time is counted twice.