Vietnam is governed under the constitution of 2013. The president, who is the head of state, is elected by the legislature for a five-year term. The government is headed by the prime minister, who is appointed by the president. The unicameral legislature consists of the 500-seat National Assembly, whose members are popularly elected for five-year terms. Administratively, the country is divided into 59 provinces and five municipalities. Vietnam's Communist party is the only legal political party.