Botswana
March 1965, effective 30 September 1966
Brazil
5 October 1988
British Virgin Islands
1 June 1977
Brunei
29 September 1959 (some provisions suspended under a State of
Emergency since December 1962, others since independence on 1
January 1984)
Bulgaria
adopted 12 July 1991
Burkina Faso
2 June 1991 approved by referendum, 11 June 1991
formally adopted; amended April 2000
Burma
3 January 1974; suspended since 18 September 1988; national
convention convened in 1993 to draft a new constitution but
collapsed in 1996; reconvened in 2004 but does not include
participation of democratic opposition
Burundi
13 March 1992; provided for establishment of a plural
political system; supplanted on 20 October 2004 by a provisional
constitution approved by the parliament which extended the
transition; a 28 February 2005 popular referendum ratified the new
constitution which set ethnic quotas for government positions, and
tentatively scheduled general elections for April 2005
Cambodia
promulgated 21 September 1993
Cameroon
20 May 1972 approved by referendum, 2 June 1972 formally
adopted; revised January 1996