The Constitutional Act refers to legislation that outlines the fundamental principles and framework of a government. It establishes the structure of government, the distribution of powers, and the rights of citizens. In many countries, such acts serve as the supreme law, guiding the legal and political systems. One notable example is the Constitutional Act of 1867, which united the provinces of Canada into a single Dominion. This act laid the groundwork for Canada's federal system, defining the roles of the federal and provincial governments and ensuring representation for various regions.