7Section 30(1) of that Act (expenditure on sea walls), except where it is applied for the purposes of corporation tax, shall have effect as if—
(a)for “for the purposes of sections 25, 28 and 31” there were substituted “ for the purpose of computing the profits or gains, or losses, of any Schedule A business carried on in relation to those premises ”; and
(b)for “in respect of dilapidation attributable to the year” there were substituted “ as an expense of the business for that year ”.