In a monarchy, the Crown is an abstract concept or symbol that represents the state and its government. In a constitutional monarchy such as Canada, the Crown is the source of non-partisan sovereign authority. It is part of the legislative, executive and judicial powers that govern the country. Under Canada’s system of responsible government, the Crown performs each of these functions on the binding advice, or through the actions of, members of Parliament, ministers or judges. As the embodiment of the Crown, the monarch — currently Queen Elizabeth II — serves as head of state. The Queen and her vice-regal representatives — the governor general at the federal level and lieutenant-governors provincially — possess what are known as prerogative powers; they can be made without the approval of another branch of government, though they are rarely used. The Queen and her representatives also fulfill ceremonial functions as Head of State.