15(1)Where an amount of government investment in a body corporate is set off under section 48 of this Act against that body's losses as at the end of an accounting period, being losses within subsection (3)(a) of that section, then—
(a)if the whole amount of those losses is extinguished by the set off sub-paragraph (2) below shall have effect in relation to the relief to which that amount is attributable; and
(b)if a lesser amount of those losses is so extinguished, that sub-paragraph shall have effect in relation to the relief to which that lesser amount is attributable.
(2)The relief referred to in sub-paragraph (1) above shall, although unrecovered in periods of account ending in or before the accounting period there mentioned, nevertheless be disregarded in ascertaining the amount of unrecovered past relief in later periods of account.
(3)Subject to sub-paragraph (4) below, relief to which any amount of extinguished losses is attributable shall be identified in accordance with paragraph 14(2) to (4) above as in the case of relief to which disallowed losses are attributable.
(4)For the purposes of sub-paragraph (1)(b) above
(a)the set off shall be treated as extinguishing the loss of an earlier accounting period before that of a later accounting period; and
(b)if the set off extinguishes only part of the loss of an accounting period, the components of that part shall be identified in accordance with paragraph 14(3) above as if that part were profits against which effect could be given to the relief.