The implied bill of rights (French: déclaration des droits implicite) is a theory in Canadian jurisprudence which proposed that as a consequence of the British North America Act, certain important civil liberties could not be abrogated by the government. The significance of an implied bill of rights has decreased since the adoption of the Canadian Charter of Rights and Freedoms, an entrenched written bill of rights, but remains important for understanding the evolution of Canadian human rights law and the Constitution of Canada. In the 1938 decision of Reference Re Alberta Statutes, a concurring opinion of the Supreme Court of Canada first proposed an implied bill of rights.
The rights and freedoms that are protected under the Charter, including the rights to freedom of speech, habeas corpus, and the presumption of innocence, have their roots in a set of Canadian laws and legal precedents related to "implied rights". Although implemented in judiciary law and part of required reading in Canadian law schools, the theory was never codified either in legislation or in the constitution by the majority in the Supreme Court of Canada. Prior to the advent of the Canadian Bill of Rights in 1960 and its successor the Charter of Rights and Freedoms in 1982, the laws of Canada did not provide much in the way of civil rights and it was typically of limited concern to the courts.
