Israel has no constitution; it is governed under the 1948 Declaration of Establishment as well as parliamentary and citizenship laws. The president is head of state, a largely ceremonial role, and is elected by the legislature for a seven-year term with no term limits. The government is headed by the prime minister, generally the leader of the largest party following legislative elections. The unicameral legislature consists of the 120-seat Knesset, whose members are elected by popular vote for four-year terms. The prime minister appoints a cabinet that must be approved by the Knesset; both the prime minister and the president are responsible to the Knesset. Administratively, the country is divided into six districts.