18(1)Schedule 4 to the [1963 c. 25.] Finance Act 1963 shall have effect subject to the following sub-paragraphs.
(2)In relation to a company the references in paragraph 15(1) to a year of assessment shall not be read as references to an accounting period, but any deduction authorised by that paragraph shall be apportioned between the accounting periods (if more than one) comprising the year of assessment; and for the references in paragraph 15(1) to a company to which section 245 of the Income Tax Act 1952 applies and to a director or member of it within the meaning of Chapter III of Part IX of that Act there shall be substituted references to a close company and to a director of or participator in it within the meaning of Part IV of this Act.
(3)In relation to a company the references in paragraph 16 to a year of assessment shall not be read as references to an accounting period, but any deduction authorised by that paragraph shall be apportioned between the accounting periods (if more than one) comprising the year of assessment, other than any such period ended before the expenditure is incurred or transfer takes place by virtue of which the company is entitled to the deduction.
(4)In paragraph 17, sub-paragraph (3)(b) shall not have effect in relation to a company.