British North America Acts
Full legislative autonomy was granted by the Statute of Westminster, 1931, passed by the Parliament of the United Kingdom. Though the statute allowed the Parliament of Canada to repeal or amend previously British laws as they applied to Canada, it did not permit amendment to Canada's constitution, including the British North America Acts. Hence, whenever a constitutional amendment was sought by the Canadian Parliament, the enactment of a British law was necessary, though Canada's consent was required. The Parliament of Canada was granted limited power to amend the constitution by a British Act of Parliament in 1949, but it was not permitted to affect the powers of provincial governments, the official positions of the English and French languages, rights of any class of persons with respect to schools, or the maximum five-year term of the legislature.