British North America Act

British North America Act, law passed by the British Parliament in 1867 that provided for the unification of the Canadian provinces into the dominion of Canada. Until 1982 the act also functioned as the constitution of Canada. The act enumerated the powers of the provincial legislatures and gave the residual powers to the dominion; its interpretation by the privy council somewhat nullified this design by giving a very extended scope to the provincial power of "property and civil rights," and developing a doctrine of "emergency powers" to give the dominion the authority needed by a national government in time of war. This act was superseded by the Canada Act of 1982.

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British North America Act

(1867) Act of the British Parliament by which three British colonies—Nova Scotia, New Brunswick, and Canada—were united as “one Dominion under the name of Canada.” The act also divided the province of Canada into the provinces of Quebec and Ontario. It served as Canada's “constitution” until 1982, when it became the basis of the Canada Act.