The major difference between a Canadian province and a territory is that provinces receive their power and authority from the "Constitution Act, 1867" (formerly called "The British North America Act, 1867"), whereas territorial governments have powers delegated to them by the Parliament of Canada. The powers flowing from the "Constitution Act" are divided between the Government of Canada (the federal government) and the provincial governments to exercise exclusively. A change to the division of powers between the federal government and the provinces requires a constitutional amendment, whereas a similar change affecting the territories can be performed unilaterally by the Parliament of Canada or government.