The SCC lowers the legal threshold for challenging the vires of subordinate legislation
Although the Supreme Court of Canada’s decision in Vavilov1 established a general framework for selecting which standard to apply on judicial review, it left open which standard of review applies to reviewing the vires of subordinate legislation, including regulations and guidelines. Vavilov therefore generated lingering uncertainty about whether pre-Vavilov principles still applied in such cases. The SCC had established in Katz Group2 that a regulation would only be struck down…

