(1)If at any time after the transfer the transferor realises the whole or part of the securities held by it immediately before that time, the transferor must bring into account for tax purposes a credit equal to the whole or the appropriate proportion of the total deferred gain.
(2)In subsection (1)—
“the total deferred gain” means the sum of the amounts by which the proceeds of realisation of relevant assets were reduced under section 828(2) or (3), so far as not already taken into account under subsection (1) or (3) of this section, and
“the appropriate proportion” means the proportion that the market value of the part of the securities realised bears to the market value of the securities held immediately before the realisation.
(3)If at any time within 6 years after the transfer the transferee realises all or some of the relevant assets held by it immediately before that time, the transferor must bring into account for tax purposes a credit equal to the whole or the appropriate proportion of the total deferred gain.
(4)In subsection (3)—
“the total deferred gain” has the meaning given in subsection (2), and
“the appropriate proportion” means the proportion that the deferred gain attributable to the relevant assets realised bears to the deferred gain attributable to the relevant assets held immediately before the realisation.
(5)For the purposes of subsection (4) the deferred gain attributable to relevant assets means the sum of the amounts by which the proceeds of realisation of those assets were reduced under section 828(2) or (3).
(6)For cases where transfers are ignored for the purposes of subsection (1) or (3), see section 830.