Canada possesses a constitution.
Canada . In 1931 , Canada achieved near total independence from the United Kingdom with the Statute of Westminster 1931 , but at the time , Canada decided to allow the British Parliament to temporarily retain the power to amend Canada 's constitution , on request from the Parliament of Canada . With the Constitution Act 1982 , Canada took over that authority ( as the conclusion of Patriation ) , removing the last remaining ties of legal dependence on the Parliament of the United Kingdom , giving the country full sovereignty . Canada is a federal parliamentary democracy and a constitutional monarchy , with Queen Elizabeth II being the head of state . The Constitution Act , 1982 ( Schedule B of the Parliament of the United Kingdom 's Canada Act 1982 ) is a part of the Constitution of Canada .