Turks and Caicos Islands introduced 30 August 1976; suspended in 1986; restored and revised 5 March 1988
Tuvalu
1 October 1978
Uganda
8 October 1995
Ukraine
adopted 28 June 1996
United Arab Emirates
2 December 1971 (made permanent in 1996)
United Kingdom
unwritten; partly statutes, partly common law and
practice
United States
17 September 1787, effective 4 March 1789
Uruguay
27 November 1966, effective February 1967; suspended 27 June
1973, new constitution rejected by referendum 30 November 1980; two
constitutional reforms approved by plebiscite 26 November 1989 and 7
January 1997
Uzbekistan
new constitution adopted 8 December 1992
Vanuatu
30 July 1980