Independence: 4 June 1970 (from UK protectorate)
National holiday: Independence Day, 4 June (1970)
Constitution: 4 November 1875, revised 1 January 1967
Legal system: based on English law
Suffrage: 21 years of age; universal
Executive branch: chief of state: King Taufa'ahau TUPOU IV (since 16 December 1965)
head of government: Prime Minister Prince Lavaka ata ULUKALALA (since NA February 2000) and Deputy Prime Minister Tevita TOPOU (since NA January 2001)
cabinet: Cabinet appointed by the monarch
note: there is also a Privy Council that consists of the monarch and the Cabinet
elections: none; the monarch is hereditary; prime minister and deputy prime minister appointed for life by the monarch