This section applies if—
C may make a claim for this Act to have effect as if an allowable loss equal to the unclaimed allowance amount had accrued to C on the deemed disposal of the asset by P.
For the purposes of this section, the "unclaimed allowance amount" in relation to a contribution allowance under Part 2A of CAA 2001, is the amount of the difference between—
For the purposes of subsection (3), the "qualifying contribution amount" is the amount of C's contribution to expenditure in respect of which the contribution allowance is available (see sections 270AA and 538A of that Act), if and to the extent that the expenditure is not allowable under section 38 as a deduction in computing the gain accruing to P on the deemed disposal.
A claim under this section must—