Ratifying countries
- 1968 - Costa Rica
- 1969 - Colombia
- 1969 - Ecuador
- 1970 - Uruguay
- 1971 - Madagascar
- 1971 - Sweden
- 1972 - Norway
- 1972 - Denmark
- 1973 - Barbados
- 1973 - Mauritius
- 1975 - Finland
- 1975 - Mongolia
- 1976 - Democratic Republic of the Congo
- 1976 - Canada
- 1976 - Suriname
- 1977 - Panama
- 1977 - Sri Lanka
- 1978 - Venezuela
- 1978 - Italy
- 1978 - Netherlands
- 1978 - Senegal
- 1978 - Dominican Republic
- 1979 - Iceland
- 1980 - Peru
- 1980 - Nicaragua
- 1980 - Trinidad and Tobago
- 1981 - Saint Vincent and the Grenadines
- 1981 - Saint Vincent and the Grenadines
- 1981 - Central African Republic
- 1982 - Bolivia
- 1983 - Republic of the Congo
- 1983 - Luxembourg
- 1983 - Portugal
- 1984 - France
- 1984 - Cameroon
- 1984 - Zambia
- 1985 - Spain
- 1985 - San Marino
- 1986 - Niger
- 1986 - Argentina
- 1987 - Austria
- 1987 - Equatorial Guinea
- 1988 - Timor-Leste
- 1988 - Togo
- 1988 - Hungary
- 1988 - Gambia
- 1989 - Philippines
- 1989 - Ireland
- 1989 - Algeria
- 1989 - Libya
- 1989 - New Zealand
- 1990 - Malta
- 1990 - Somalia
- 1990 - South Korea
- 1991 - Poland
- 1991 - Russia
- 1991 - Nepal
- 1991 - Australia
- 1991 - Ukraine
- 1991 - Mongolia
- 1991 - Estonia
- 1991 - Lithuania
- 1992 - Benin
- 1992 - Seychelles
- 1992 - Cyprus
- 1992 - Angola
- 1992 - Chile
- 1992 - Bulgaria
- 1992 - Belarus
- 1993 - Czechia
- 1993 - Guinea
- 1993 - Romania
- 1993 - Germany
- 1993 - Slovenia
- 1993 - Slovakia
- 1993 - Armenia
- 1994 - Kyrgyzstan
- 1994 - Namibia
- 1994 - Belgium
- 1994 - North Macedonia
- 1994 - Georgia
- 1994 - Latvia
- 1995 - Chad
- 1995 - Uzbekistan
- 1995 - Bosnia and Herzegovina
- 1995 - Uganda
- 1995 - El Salvador
- 1995 - Paraguay
- 1995 - Croatia
- 1996 - Sierra Leone
- 1996 - Malawi
- 1997 - Côte d'Ivoire
- 1997 - Turkmenistan
- 1998 - Liechtenstein
- 1999 - Burkina Faso
- 1999 - Guyana
- 1999 - Tajikistan
- 2000 - Cape Verde
- 2000 - Ghana
- 2000 - Guatemala
- 2000 - Lesotho
- 2001 - Nauru
- 2001 - Serbia
- 2001 - Mali
- 2001 - Azerbaijan
- 2002 - Djibouti
- 2002 - South Africa
- 2002 - Mexico
- 2004 - Liberia
- 2004 - Cambodia
- 2005 - Honduras
- 2005 - Moldova
- 2006 - Turkey
- 2006 - Andorra
- 2006 - Montenegro
- 2007 - Albania
- 2007 - Maldives
- 2009 - Brazil
- 2009 - Kazakhstan
- 2011 - Tunisia
- 2013 - Guinea-Bissau
- 2017 - São Tomé and Príncipe
- 2022 - Morocco
