Increasingly, litigants are seeking to rely on international treaties before domestic courts. The difficulties they face, together with the judges hearing these cases, are great. Public international law is unknown territory for the vast majority of Canadian lawyers, both at the bar and on the bench. Moreover, the rules according to which international treaties take effect in Canadian domestic law engage a wide variety of legal sources, including ancient common law jurisprudence, unwritten constitutional rules, federalism, and the provisions of the Canadian Charter of Rights and Freedoms and other Canadian human rights instruments. The object of this article is to describe in a comprehensive manner how international treaties may be used in Canadian courts. The disparate and seemingly unrelated norms informing the Anglo-Canadian law of treaty reception, including the implementation requirement, the treaty presumption, the rule in Labour Conventions, and the landmark decision in Baker v. Canada, are depicted as internally-consistent manifestations of the guiding principles of the Canadian reception system: self-government and respect for international law.