130R147. For the purposes of section 221 of the Act, where a taxpayer is deemed to have acquired depreciable property of a prescribed class at the time a repair, replacement, alteration or renovation expenditure in respect of property described therein was incurred,(a) if the expenditure was incurred before 26 May 1976, the class prescribed is Class 4 in Schedule B; and
(b) if the expenditure was incurred after 25 May 1976, the class prescribed is the class in Schedule B in which the depreciable property that was repaired, replaced, altered or renovated would be included if such property had been acquired at the time the expenditure was incurred.