Section 402 of the Principal Act is amended -
(a) in subsection (2), by the insertion of the following after paragraph (b):
"(c) For the purposes of this subsection, references to an amount of any allowance or charge to be made in taxing a trade shall include a reference to an amount of any allowance or charge to be made by means of discharge or repayment of tax in taxing the leasing activities of a company, where those activities are charged to tax under Case IV of Schedule D and references to a trading expense or receipt shall be construed accordingly.",
(b) by the insertion of the following after subsection (3):
(a) Subject to paragraph (b), where a company incurs a loss in an accounting period arising from a leasing activity in respect of which the company is within the charge to corporation tax under Case IV of Schedule D and makes a claim under section 399(1) to set that loss off against the amount of any income arising from such activities in respect of which the company is
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