Versions of s. 18.2(1), definition “cumulative unused excess capacity”, para (b)(i)(A)

there are to be reductions to the taxpayer’s excess capacity for the transfer year and the three taxation years immediately preceding the transfer year (each referred to in this subparagraph as a “relevant year”) in a total amount equal to the total of all amounts each of which is an amount of transferred capacity of the taxpayer for the transfer year (referred to in this definition as the “total transferred capacity amount”), and