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Government

The now defunct Southern Sudan Legislative Assembly ratified a transitional constitution shortly before independence on 9 July 2011. The constitution was signed by the President of South Sudan, Salva Kiir Mayardit, on Independence Day and thereby came into force. It is now the supreme law of the land, superseding the Interim Constitution of 2005.

The constitution establishes a presidential system of government headed by a presiden t who is head of state, head of government, and commander-in-chief of the armed forces. It also establishes the National Legislature comprising two houses: a directly elected assembly, the National Legislative Assembly, and a second chamber of representatives of the states, the Council of States.

John Garang, one of the founders of the SPLA/M, was the president of the autonomous government until his death on 30 July 2005. Salva Kiir Mayardit, his deputy, was sworn in as First Vice President of Sudan and President of the Government of Southern Sudan on 11 August 2005. Riek Machar replaced him as Vice-President of the Government. Legislative power is vested in the government and the bicameral National Legislature. The constitution also provides for an independent judiciary, the highest organ being the Supreme Court.

On 8 May 2021, South Sudan President Salva Kiir announced a dissolution of Parliament as part of a 2018 peace deal to set up a new legislative body that will number 550 lawmakers. According to 2023 V-Dem Democracy indices South Sudan is third lowest ranked electoral democracy in Africa.