553.2. Where the cost to a taxpayer referred to in section 551 of a property received as consideration for the disposition that is an option or a bond, debenture or note is determined at any time under section 553 and the terms of the bond, debenture or note conferred upon the holder the right to exchange that bond, debenture or note for shares,(a) the taxpayer shall deduct after that time, in computing the adjusted cost base to the taxpayer of the property, the aggregate of all amounts deducted under paragraph b.1 of section 257 in computing, immediately before that time, the adjusted cost base to the taxpayer of the capital property disposed of; and
(b) the taxpayer shall add, after that time, in computing the adjusted cost base to the taxpayer of the property, the amount determined under paragraph a.