An election is the democratic process through which citizens vote to choose representatives who will govern on their behalf. In Canada, elections occur at three levels: federal elections choose Members of Parliament, provincial/territorial elections choose members of provincial legislatures or territorial assemblies, and municipal elections choose mayors, councillors, and school board trustees. Federal and most provincial elections use a first-past-the-post system where candidates with the most votes in each riding win, though some jurisdictions have explored proportional representation. Fixed election date legislation now schedules most elections, though early elections can still be called. Eligible voters must be Canadian citizens (for federal/provincial) or residents (for municipal), meet age requirements (18 for federal/provincial, varies by province for municipal), and be listed on voters lists or register on election day. Voting is a fundamental right and responsibility in democratic society.