Versions of s. 21(1)(a)

in computing the taxpayer’s income for the year and for such of the 3 immediately preceding taxation years as the taxpayer had, paragraphs 20(1)(c), 20(1)(d), 20(1)(e) and 20(1)(e.1) do not apply to the amount or to the part of the amount specified in the taxpayer’s election that, but for an election under this subsection in respect thereof, would be deductible in computing the taxpayer’s income (other than exempt income) for any such year in respect of borrowed money used to acquire the depreciable property or the amount payable for the depreciable property; and