Croatia is governed under the constitution of 1990 as amended. The president, who is the head of state, is popularly elected for a five-year term. The government is headed by the prime minister, who is appointed by the president and approved by the legislature. Members of the unicameral Assembly ( Sabor ), are elected from party lists by popular vote to serve four-year terms. Administratively, Croatia is divided into 20 counties and the capital city.