638. A taxpayer shall include, in computing his gain from the disposition of an interest in a partnership, for a taxation year, in addition to the amount determined under section 234, the excess of the amounts to be deducted in computing the adjusted cost base of his interest in the partnership, immediately before the disposition, under section 257, over the aggregate of the cost of his interest in the partnership, determined for the purposes of computing the adjusted cost base of that interest at that time, and the amounts required by section 255 to be added to that cost in such computation at that time.
1972, c. 23, s. 482; 1973, c. 17, s. 70; 1975, c. 22, s. 177; 1997, c. 3, s. 71.