Romania is governed under the constitution of 1991 as revised. The president, who is the head of state, is elected by popular vote for a five-year term and is eligible for a second term. The government is headed by the prime minister, who is appointed by the president with the approval of the legislature; the cabinet is appointed by the prime minister. The bicameral legislature, or Parliament, consists of the 176-seat Senate and the 412-seat Chamber of Deputies. Legislators are popularly elected using a mix of direct and proportional representation and serve four-year terms. Administratively, the country is divided into 41 counties and one municipality (Bucharest).