Cambodia is a constitutional monarchy governed under the constitution of 1993, as amended. The king, who is head of state, is chosen by the Royal Council of the Throne from among the members of the royal family. The government is headed by the premier, who is chosen by the head of the National Assembly and appointed by the king. The bicameral parliament consists of the popularly elected 123-seat National Assembly and the 61-seat Senate. Two members of the Senate are appointed by the monarch, two are elected by the National Assembly, and 57 are indirectly elected. All members of the parliament serve five-year terms. Administratively, Cambodia is divided into 20 provinces and four municipalities.