Membership of the ICDO is open to all States which accept its Constitution and takes effect thirty days after the deposit of the instrument of ratification or accession

Algeria
26/11/1977
Armenia
01/04/1994
Azerbaijan
03/11/1993
Bahrain
20/03/1990
Benin
01/03/1972
Burkina Faso
06/09/1978
Burundi
19/02/2009
Cameroon
17/06/1989
Chad
01/03/1972
China
03/09/1992
Congo
30/03/2007
Cuba
18/12/2014
Cyprus
01/03/1972
Egypt
01/03/1972
El Salvador
30/12/1985
Gabon
01/03/1972
Georgia
12/01/1995
Ghana
02/08/1974
Guinea
25/10/2007
Haiti
30/11/1989
Iraq
03/08/1979
Jordan
11/02/1978
Kazakhstan
15/03/1996
Kyrgyzstan
09/01/2012
Lebanon
01/03/1972
Lesotho
25/12/1976
Liberia
01/03/1972
Libya
27/09/1972
Malaysia
06/06/2010
Mali
16/03/1974
Mauritania
03/04/1972
Mongolia
04/11/2002
Morocco
29/08/1980
Nicaragua
18/11/2009
Niger
03/05/1977
Nigeria
07/10/2004
Oman
20/12/1985
Pakistan
01/01/1970
Palestine
16/05/2007
Qatar
01/03/1972
Saudi Arabia
01/03/1972
Senegal
24/06/1975
Serbia
01/05/2019
South Sudan
07/01/2017
Sudan
06/04/1994
Tajikistan
11/02/2016
Togo
05/03/2014
Tunisia
01/03/1972
Vanuatu
09/07/2021
Yemen
15/10/1997