American Samoa
ratified 1966, in effect 1967
Andorra
Andorra's first written constitution was drafted in 1991;
approved by referendum 14 March 1993; came into force 4 May 1993
Angola
11 November 1975; revised 7 January 1978, 11 August 1980, 6
March 1991, and 26 August 1992; note - new constitution has not yet
been approved
Anguilla
Anguilla Constitutional Order 1 April 1982; amended 1990
Antigua and Barbuda
1 November 1981
Argentina
1 May 1853; revised August 1994
Armenia
adopted by nationwide referendum 5 July 1995
Aruba
1 January 1986
Australia
9 July 1900, effective 1 January 1901
Austria
1920; revised 1929 (reinstated 1 May 1945)