(1)This section applies if—
(a)a company carries on a property business in relation to land which consists of or includes a dwelling-house,
(b)the company incurs expenditure in acquiring and installing an energy-saving item in the dwelling-house or in a building containing the dwelling-house (see subsections (5) to (7)),
(c)the expenditure is incurred before 1 April 2015,
(d)a deduction for the expenditure is not prohibited by the wholly and exclusively rule but would otherwise be prohibited by the capital prohibition rule (see subsection (8)), and
(e)no allowance under CAA 2001 may be claimed in respect of the expenditure.
(2)In calculating the profits of the business, a deduction for the expenditure is allowed.
(3)But any deduction is subject to—
(a)section 252 (restrictions on relief), and
(b)any provision made by regulations under section 253.
(4)If, on a just and reasonable apportionment of any expenditure, part of the expenditure would qualify for the relief (but the remainder would not), a deduction is allowed for that part.
(5)“Energy-saving item” means an item of an energy-saving nature of such description as is for the time being specified in regulations made by the Treasury.
(6)The Treasury may by regulations provide for an item to be an energy-saving item only if it satisfies such conditions as may be—
(a)specified in, or
(b)determined in accordance with,
the regulations.
(7)The conditions may include conditions imposed by reference to information or documents issued by any body, person or organisation.
(8)In this section—
“the capital prohibition rule” means the rule in section 53 (capital expenditure), as applied by section 210, and
“the wholly and exclusively rule” means the rule in section 54 (expenses not wholly and exclusively for trade and unconnected losses), as applied by section 210.