The Constitution of South Africa is the supreme law of the Republic of South Africa. It provides the legal foundation for the existence of the republic, it sets out the rights and duties of its citizens, and defines the structure of the Government. The current constitution, the country's fifth, was drawn up by the Parliament elected in 1994 in the South African general election, 1994. It was promulgated by President Nelson Mandela on 18 December 1996 and came into effect on 4 February 1997, replacing the Interim Constitution of 1993. The first constitution was enacted by the South Africa Act 1909, the longest-lasting to date. Since 1961, the constitutions have promulgated a republican form of government.