Gabon is governed under the constitution of 1991. The president, who is head of state, is popularly elected for a seven-year term; there are no term limits. The government is headed by the prime minister, who is appointed by the president. The bicameral legislature consists of the 91-seat Senate, whose members are indirectly elected for six-year terms, and the 120-seat National Assembly, whose members are popularly elected for five-year terms. Administratively, the country is divided into nine provinces.