618. For the purposes of this Part, where, but for this section, at any time after 31 December 1971 a partnership would be dissolved, the following rules apply:(a) until such time as all the partnership property and any property substituted therefor has been distributed to the persons entitled by law to receive it, the partnership is deemed to continue to exist, and each person who was a member of the partnership is deemed to still be a member of the partnership;
(b) the right of each such person to share in that property is deemed to be an interest in the partnership; and
(c) notwithstanding section 261, where at the end of a fiscal period of the partnership, in respect of an interest in the partnership, the aggregate of all amounts required by section 257, to be deducted in computing the adjusted cost base to a taxpayer of the interest at that time exceeds the aggregate of the cost to the taxpayer of the interest determined for the purpose of computing the adjusted cost base to the taxpayer of that interest at that time and all amounts required by section 255 to be added to the cost to the taxpayer of the interest in computing the adjusted cost base to the taxpayer of that interest at that time, the amount of the excess is deemed to be a gain of the taxpayer for the taxpayer’s taxation year that includes that time from a disposition at that time of that interest and, for the purposes of Title VI.5.1 of Book IV, that interest is deemed to have been disposed of by the taxpayer at that time.