Guyana is governed under the constitution of 1980. The president, who is the head of state, is popularly elected (as leader of a parliamentary party list) for a five-year term. The president appoints the prime minister, who is the head of government, and the cabinet. The legislature is the unicameral National Assembly, whose 65 members are elected for five-year terms. Administratively, the country is divided into ten regions. Guyana is a member of the Commonwealth of Nations.