5(1)Subject to sub-paragraph (2) below, a material disposal gives rise to an offshore income gain of an amount equal to the unindexed gain on that disposal.
(2)In any case where—
(a)paragraph 4 above applies, and
(b)the post-1983 gain on the material disposal is less than the unindexed gain on the disposal,
the offshore income gain to which the disposal gives rise is an amount equal to the post-1983 gain.