Aruba:
1 January 1986
Australia:
9 July 1900, effective 1 January 1901
Austria:
1920; revised 1929 (reinstated 1 May 1945)
Azerbaijan:
adopted 12 November 1995
Bahamas, The:
10 July 1973
Bahrain:
adopted late December 2000 (new constitution calls for a
partially elected legislature, a constitutional monarchy, and an
independent judiciary)
Bangladesh:
4 November 1972, effective 16 December 1972, suspended
following coup of 24 March 1982, restored 10 November 1986, amended
many times
Barbados:
30 November 1966
Belarus:
30 March 1994; revised by national referendum of 24
November 1996 giving the presidency greatly expanded powers and
became effective 27 November 1996
Belgium:
7 February 1831, last revised 14 July 1993; parliament
approved a constitutional package creating a federal state