Versions of s. 60.2(2)(a)
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such part of the total of all amounts each of which is an additional voluntary contribution made by the taxpayer to a registered pension plan before October 9, 1986 in respect of services rendered by the taxpayer before the year in which the contribution was made, to the extent that the contribution was not deducted in computing the taxpayer’s income for any taxation year, as may reasonably be considered as having been