The Supreme Court of Canada heard argument last Monday in an important case on reviewing delegated legislation: Shopper's Drug Mart v. Minister for Health. The pharmacies lost in the Ontario Court of Appeal: 2011 ONCA 830; though Epstein J.A. delivered a convincing dissent. Up for discussion at the Supreme Court of Canada was the vires of the regulations and, in particular, whether they sought to use a power to regulate to prohibit commercial activities.