National holiday: Independence Day, 12 July (1975)
Constitution: approved March 1990; effective 10 September 1990
Legal system: based on Portuguese legal system and customary law; has not accepted compulsory ICJ jurisdiction
Suffrage: 18 years of age; universal
Executive branch: chief of state: President Miguel TROVOADA (since 4 April 1991)
head of government: Prime Minister Guilherma Posser da COSTA (since 30 December 1998)
cabinet: Council of Ministers appointed by the president on the proposal of the prime minister
elections: president elected by popular vote for a five-year term; election last held 30 June and 21 July 1996 (next to be held NA July 2001); prime minister chosen by the National Assembly and approved by the president
election results: Miguel TROVOADA reelected president in Sao Tome's second multiparty presidential election; percent of vote - Miguel TROVOADA 52.74%, Manuel Pinto da COSTA 47.26%
Legislative branch: unicameral National Assembly or Assembleia Nacional (55 seats; members are elected by direct popular vote to serve five-year terms)