Christmas Island
Christmas Island Act of 1958-59 (1 October 1958) as
amended by the Territories Law Reform Act of 1992

Cocos (Keeling) Islands
Cocos (Keeling) Islands Act of 1955 (23
November 1955) as amended by the Territories Law Reform Act of 1992

Colombia
5 July 1991

Comoros
23 December 2001

Congo, Democratic Republic of the
18 February 2006

Congo, Republic of the
approved by referendum 20 January 2002

Cook Islands
4 August 1965

Costa Rica
7 November 1949

Cote d'Ivoire
new constitution adopted 4 August 2000

Croatia
adopted on 22 December 1990; revised 2000, 2001