8(1)Where, in the case of a relevant chargeable building, subsection (1) of the principal section or sub-paragraph (3) of paragraph 2 of this Schedule would, apart from this paragraph, apply to an interest which a person has in the relevant land on the material date, or, as the case may be, the subsequent date within the meaning of that sub-paragraph, then, subject to the following provisions of this paragraph, that subsection or sub-paragraph, as the case may be, shall not apply, and be deemed never to have applied, to that interest if the whole of that interest is disposed of by him within the period of three years beginning with that date or such longer period as the Board may by notice in writing allow.
(2)The preceding sub-paragraph shall not be taken to affect the application of the said subsection (1) to interests in the relevant land which are not excluded therefrom by that sub-paragraph.
(3)Sub-paragraph (1) above shall not apply if by virtue of any enactment the person disposing of his interest in the relevant land (" the disposer ") and the person to whom the disposal is made fall to be treated as if the latter's acquisition of it were for a consideration of such amount as would secure that on the disposal by the disposer neither a gain nor a loss would accrue to the disposer.