| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Accession | 25/03/1964 | |
| ARGENTINA | Accession | 10/10/1963 | |
| AUSTRALIA | Accession | 09/05/1986 | |
| AUSTRIA | Accession | 21/07/1950 | |
| BAHRAIN | Accession | 17/09/1992 | 17/09/1992 |
| BAHRAIN | Declaration | 17/09/1992 | |
| BARBADOS | Accession | 19/11/1971 | |
| BELARUS | Accession | 27/08/1992 | 18/03/1992 |
| BELGIUM | Accession | 14/03/1962 | |
| BOSNIA AND HERZEGOVINA | Succession | 01/09/1993 | 06/03/1992 |
| BOTSWANA | Accession | 05/04/1983 | |
| BRAZIL | Accession | 22/03/1963 | |
| BULGARIA | Application | 24/01/2000 | 24/01/2000 |
| CHILE | Accession | 21/09/1951 | |
| CHINA | Accession | 30/06/1981 | |
| CONGO, DEMOCRATIC REPUBLIC OF | Accession | 08/12/1964 | |
| DENMARK | Accession | 25/01/1950 | |
| ECUADOR | Accession | 07/07/1953 | |
| FINLAND | Accession | 31/07/1958 | |
| GABON | Accession | 30/11/1982 | |
| GAMBIA THE | Accession | 01/08/1966 | |
| GEORGIA | Application | 18/07/2007 | 18/07/2007 |
| GERMANY FEDERAL REPUBLIC | Accession | 10/10/1957 | |
| GHANA | Accession | 09/09/1958 | |
| GREECE | Accession | 21/06/1977 | |
| GUATEMALA | Accession | 30/06/1951 | |
| GUINEA | Accession | 29/03/1968 | |
| GUYANA | Accession | 13/09/1973 | |
| HAITI | Accession | 16/04/1952 | |
| HUNGARY | Accession | 19/08/1982 | |
| HUNGARY | Declaration | 19/08/1982 | |
| ICELAND | Accession | 17/01/2006 | 17/01/2006 |
| INDIA | Accession | 19/10/1949 | |
| INDONESIA | Accession | 08/03/1972 | |
| IRAN | Accession | 16/05/1974 | |
| IRAQ | Accession | 09/07/1954 | |
| IRELAND, REPUBLIC OF | Accession | 10/05/1967 | |
| ITALY | Accession | 30/08/1985 | |
| IVORY COAST | Accession | 04/06/1962 | |
| JAPAN | Accession | 18/04/1963 | |
| KENYA | Accession | 01/07/1965 | |
| KOREA REPUBLIC OF | Accession | 13/05/1977 | |
| KUWAIT | Accession | 07/02/1963 | |
| LAOS | Accession | 09/08/1960 | |
| LATVIA | Application | 19/12/2005 | 19/12/2005 |
| LESOTHO | Accession | 26/11/1969 | |
| LIBYA | Accession | 30/04/1958 | |
| LUXEMBOURG | Accession | 20/09/1950 | |
| MADAGASCAR | Accession | 03/01/1966 | |
| MALAWI | Accession | 02/08/1965 | |
| MALI | Accession | 24/06/1968 | |
| MALTA | Accession | 13/02/1969 | |
| MONACO | Accession | 03/11/1976 | |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NEPAL | Accession | 28/09/1965 | |
| NETHERLANDS THE | Accession | 21/07/1949 | |
| NICARAGUA | Accession | 06/04/1959 | |
| NIGER | Accession | 15/05/1968 | |
| NORWAY | Accession | 25/01/1950 | |
| PAKISTAN | Accession | 07/11/1951 | |
| PARAGUAY | Accession | 13/01/2006 | 13/01/2006 |
| PHILIPPINES | Accession | 20/03/1950 | |
| ROMANIA | Accession | 23/08/1974 | |
| RWANDA | Accession | 23/06/1964 | |
| SAINT LUCIA | Accession | 02/09/1986 | |
| SENEGAL | Accession | 02/03/1966 | |
| SEYCHELLES | Accession | 24/07/1985 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SLOVENIA | Succession | 01/07/1992 | 25/06/1991 |
| SPAIN | Accession | 26/09/1974 | |
| SWEDEN | Accession | 12/09/1951 | |
| TANGANYIKA | Accession | 10/04/1963 | |
| THAILAND | Accession | 19/06/1961 | |
| TRINIDAD AND TOBAGO | Accession | 19/10/1965 | |
| TUNISIA | Accession | 03/12/1957 | |
| UGANDA | Accession | 11/08/1983 | |
| UNITED ARAB REPUBLIC | Accession | 28/09/1964 | |
| UPPER VOLTA | Accession | 06/04/1962 | |
| URUGUAY | Accession | 29/12/1977 | |
| YUGOSLAVIA | Accession | 23/11/1951 | |
| ZIMBABWE | Accession | 05/03/1991 | 05/03/1991 |