The major difference between a Canadian province and a territory is that provinces receive their power and authority from the ''Constitution Act, 1867'', whereas territorial governments have powers delegated to them by the Parliament of Canada. The powers flowing from the ''Constitution Act, 1867'' are divided between the federal government and the provincial governments to exercise exclusively. As the division of powers between the federal government and the provinces are defined in the constitution, any changes require a constitutional amendment. The territories, being creatures of the federal government, changes to their role and division of powers may be performed unilaterally by the Parliament of Canada.