This year saw significant developments in occupational health and safety law across Canada. …Employers must now deal with the myriad of issues accompanying the legalization of recreational cannabis. …In West Fraser Mills Ltd. v British Columbia, the Supreme Court of Canada found that a site owner could be penalized under British Columbia’s Workers Compensation Act. …The majority… concluded that the involved provision of the OHS Regulation was a reasonable exercise of the power conferred by the act. It found that an owners’ duties are not limited to those set out in the Workers Compensation Act as the involved provision of the OHS Regulation is a “natural extension” of the owner’s Workers Compensation Board duty to ensure compliance. The majority also held that West Fraser Mills was an “employer” for the act’s purposes. The upshot is that the penalty section of the act may be applied broadly.