East Timor is governed under the constitution of 2002. The president, who is head of state, is popularly elected and may serve two five-year terms. The government is headed by the prime minister, who is appointed by the president. Members of the unicameral National Parliament are elected by popular vote for five-year terms. The number of seats can vary from 52 to 65. Administratively, the country is divided into 13 districts.