Equatorial Guinea is governed under the constitution of 1991 as amended. The president, who is head of state, is popularly elected for a seven-year term; a two-term limit was adopted in 2011. The government is headed by a prime minister, who is appointed by the president. The unicameral legislature consists of the 100-seat House of People's Representatives, whose members are elected by popular vote to serve five-year terms. However, the legislature has little power, as the constitution vests most authority in the president. Administratively, the country is divided into seven provinces.