By Barb Cotton and Christine Silverberg ( June 28, 2021, 2:12 PM EDT) -- Justice Sheilah L. Martin has given us much to be grateful for in her comprehensive decision of Colucci v. Colucci 2021 SCC 24. Writing for the Supreme Court of Canada, Justice Martin laid out a principled approach to issues of “retroactive” child support, both (i) with respect to applications for retroactive increases in support that should have been paid given revealed increases in the payor’s income, and (ii) with respect to retroactive decreases in child support paid given the reduction in income of the payor....