If the amount or value of the consideration for the disposal of the relinquished interest is equal to or less than the amount or value of the consideration for the acquired interest, the landowner, on making a claim, is to be treated for the purposes of this Act—
Where the amount or value of the consideration for the disposal of the relinquished interest exceeds the amount or value of the consideration for the acquired interest, then if the excess ("the unexpended consideration") is less than the amount of the gain (whether all chargeable gain or not) accruing on the disposal of the relinquished interest, the landowner on making a claim is to be treated for the purposes of this Act—
Subsections (1) and (2) are subject to section 248C(3).
Nothing in subsection (1) or (2) affects the treatment for the purposes of this Act of a co-owner (within the meaning given by section 248A(7)).
Where subsection (1)(a) applies to exclude a gain which, in consequence of Schedule 2 (assets held on 6th April 1965) is not all chargeable gain, the amount of the reduction to be made under subsection (1)(b) shall be the amount of the chargeable gain, and not the whole amount of the gain.