word | | Constitution |
| effective | Puerto Rico | ratified 3 March 1952; approved by US Congress 3 July 1952; effective 25 July 1952 |
| effective | Qatar | ratified by public referendum 29 April 2003; endorsed by the Amir 8 June 2004, effective 9 June 2005 |
| effective | Saint Helena | The Saint Helena, Ascension and Tristan da Cunha Constitution Order 2009, effective 1 September 2009 |
| effective | Sao Tome and Principe | approved March 1990, effective 10 September 1990 |
| effective | Serbia | adopted 8 November 2006; effective 10 November 2006 |
| effective | Slovakia | ratified 1 September 1992, effective 1 January 1993; changed September 1998; amended February 2001 note: the change in September 1998 allowed direct election of the president; the amendment of February 2001 allowed ... |
| effective | South Sudan | Transitional Constitution of the Republic of South Sudan 2011, effective 9 July 2011 |
| effective | Suriname | ratified 30 September 1987; effective 30 October 1987 |
| effective | Taiwan | adopted 25 December 1946; promulgated 1 January 1947; effective 25 December 1947; amended many times |
| effective | Timor-Leste | 20 May 2002 (effective date) |
| effective | Turks and Caicos Islands | Turks and Caicos Islands Constitution (Interim Amendment) Order 2009, S.I. 2009/701 - effective 14 August 2009 - suspended Ministerial government, the House of Assembly, and the constitutional right to trial by jury, and imposed ... |
| effective | United States | 17 September 1787, effective 4 March 1789 |
| effective | Uruguay | 27 November 1966; effective 15 February 1967; suspended 27 June 1973; revised 26 November 1989 and 7 January 1997 |
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