Section 79.1 — Canada Pension Plan: Total first additional pensionable earnings attributable to first additional contributions made under Act as a result of division

For a year of a division as determined under section 55.1 and under a provincial pension plan, the total first additional pensionable earnings of a contributor attributable to first additional contributions made under this Act are an amount equal to the amount that their total first additional pensionable earnings would be if the first additional unadjusted pensionable earnings of the contributor for the year were that proportion of their first additional unadjusted pensionable earnings for the year that their first additional unadjusted pensionable earnings attributed under subsection 55.2(5.1) are of their total first additional unadjusted pensionable earnings for the year determined under subsection 55.2(6.1).