Burkina Faso is a parliamentary republic governed under the constitution of 1991, as amended. The executive branch is headed by a president, who is elected by popular vote for a five-year term and is eligible for a second term. The prime minister, who is the head of government, is appointed by the president. The unicameral legislature consists of a 111-member National Assembly, whose members are popularly elected to serve five-year terms. Administratively, the country is divided into 45 provinces.