The Government of Turkey () is the national government of Turkey. It is governed as a unitary state under a presidential representative democracy and a constitutional republic within a pluriform multi-party system. The term government can mean either the collective set of institutions (the executive, legislative, and judicial branches) or specifically the Cabinet (the executive). Naming The republic is named "Turkey" () or "Republic of Türkiye" () with its full name. No other name appears in the Constitution, and this is the name that appears on money, in treaties, and in legal cases to which it is a party. The terms "Government of Turkey" or "Turkish Government" are often used in official documents to represent the national government as distinct from the local entities. Because the seat of government is in Ankara, "Ankara" is commonly used as a metonym for the central government. Constitution According to the Constitution, Turkey's government system is based on a separation of powers. The Constitution states that the legislative power is vested in the Grand National Assembly of Turkey (art. 7), that the executive power is carried out by the President of Turkey (art. 8) and that the judicial power is exercised by independent and impartial courts (art. 9) It also states that parliamentary elections and presidential elections shall be held every five years (art. 77). The Parliament accepts the law proposals prepared by the deputies (88 art.) The President promulgates the laws adopted by the Parliament (art. 89). The President may veto some of the provisions of the law and return it to the Parliament for reconsideration, but the approval of the President is not needed if the majority of the Parliament rejects the reconsideration of the law or provisions of the law (art. 89). The President can appeal to the Constitutional Court for the annulment of all or certain provisions of laws on the grounds that they are unconstitutional in form or in content (art. 104/7). In such a case, the decision of the Constitutional Court is final (art. 153). Branches of government Legislative branch Legislative power is vested in a single-chamber parliament (the Grand National Assembly of Turkey) with 600 members. The members are elected for a period of five years according to the D'Hondt method. Every citizen over the age of eighteen is eligible to be a deputy. Members of the Grand National Assembly can not hold office in state departments