| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Accession | 09/05/1986 | |
| AUSTRIA | Accession | 08/11/1962 | |
| BELGIUM | Accession | 14/03/1962 | |
| BOSNIA AND HERZEGOVINA | Succession | 01/09/1993 | 06/03/1992 |
| BRAZIL | Accession | 22/03/1963 | |
| CHINA | Accession | 30/06/1981 | |
| CONGO, DEMOCRATIC REPUBLIC OF | Accession | 08/12/1964 | |
| DENMARK | Accession | 03/08/1962 | |
| FINLAND | Accession | 16/11/1962 | |
| GABON | Accession | 30/11/1982 | |
| GAMBIA THE | Accession | 01/08/1966 | |
| GERMANY FEDERAL REPUBLIC | Accession | 11/06/1985 | |
| GUATEMALA | Accession | 18/05/1962 | |
| GUINEA | Accession | 29/03/1968 | |
| GUYANA | Accession | 13/09/1973 | |
| ICELAND | Accession | 17/01/2006 | 17/01/2006 |
| INDONESIA | Accession | 08/03/1972 | |
| INDONESIA | Reservation | 08/03/1972 | |
| IRAN | Accession | 16/05/1974 | |
| 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 | |
| KUWAIT | Accession | 07/02/1963 | |
| LATVIA | Accession | 13/01/2006 | 13/01/2006 |
| LESOTHO | Accession | 26/11/1969 | |
| MALAWI | Accession | 02/08/1965 | |
| MALTA | Accession | 27/06/1968 | 21/09/1964 |
| MOROCCO | Accession | 03/11/1976 | |
| NETHERLANDS THE | Accession | 28/06/1965 | |
| NIGER | Accession | 15/05/1968 | |
| NORWAY | Application | 22/11/2000 | 22/11/2000 |
| RWANDA | Accession | 23/06/1964 | |
| SAINT LUCIA | Accession | 02/09/1986 | |
| SENEGAL | Accession | 02/03/1966 | |
| SEYCHELLES | Accession | 24/07/1985 | |
| SLOVAK REPUBLIC | Succession | 23/05/1993 | 01/01/1993 |
| SLOVENIA | Succession | 01/07/1992 | 25/06/1991 |
| SPAIN | Accession | 26/09/1974 | |
| SWEDEN | Accession | 11/04/1962 | |
| UGANDA | Accession | 11/08/1983 | |
| YUGOSLAVIA | Accession | 08/04/1964 | |
| ZIMBABWE | Accession | 05/03/1991 | 05/03/1991 |