| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Accession | 25/03/1964 | |
| ARGENTINA | Accession | 10/10/1963 | |
| AUSTRALIA | Accession | 09/05/1986 | |
| BAHAMAS | Succession | 17/03/1977 | |
| BAHRAIN | Accession | 17/09/1992 | 17/09/1992 |
| BARBADOS | Accession | 19/11/1971 | |
| BELGIUM | Accession | 14/03/1962 | |
| BRAZIL | Accession | 22/03/1963 | |
| BULGARIA | Accession | 13/06/1968 | |
| CHINA | Accession | 11/09/1979 | |
| CHINA | Reservation | 11/09/1979 | |
| CUBA | Accession | 13/09/1972 | |
| CUBA | Reservation | 13/09/1972 | |
| CYPRUS | Accession | 06/05/1964 | |
| CZECHOSLOVAKIA | Accession | 29/12/1966 | |
| DENMARK | Accession | 20/05/1960 | |
| FIJI | Succession | 21/06/1971 | |
| FINLAND | Accession | 08/06/1959 | |
| GABON | Accession | 30/11/1982 | |
| GAMBIA THE | Accession | 01/08/1966 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 04/10/1974 | |
| GERMANY FEDERAL REPUBLIC | Accession | 11/06/1985 | |
| GREECE | Accession | 21/06/1977 | |
| GUINEA | Accession | 29/03/1968 | |
| GUYANA | Accession | 13/09/1973 | |
| HAITI | Accession | 05/08/1959 | |
| HUNGARY | Accession | 09/08/1973 | |
| HUNGARY | Declaration | 09/08/1973 | |
| INDONESIA | Accession | 08/03/1972 | |
| IRAN | Accession | 16/05/1974 | |
| IRELAND, REPUBLIC OF | Accession | 10/05/1967 | |
| ITALY | Accession | 30/08/1985 | |
| JAPAN | Accession | 18/04/1963 | |
| KENYA | Accession | 01/07/1965 | |
| KUWAIT | Accession | 07/02/1963 | |
| LAOS | Accession | 09/08/1960 | |
| LATVIA | |||
| MADAGASCAR | Accession | 03/01/1966 | |
| MALAWI | Accession | 02/08/1965 | |
| MALDIVES | Accession | 26/05/1969 | |
| MALTA | Accession | 27/03/1968 | 21/09/1964 |
| MAURITIUS | Succession | 18/07/1969 | 12/03/1968 |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NETHERLANDS THE | Accession | 28/06/1965 | |
| NETHERLANDS THE | Statement | 11/01/1980 | |
| NETHERLANDS THE | Statement | 28/01/1980 | |
| NEW ZEALAND | Accession | 17/10/1963 | |
| NIGERIA | Accession | 26/06/1961 | |
| NORWAY | Accession | 30/01/1961 | |
| PAKISTAN | Accession | 13/03/1962 | |
| POLAND | Accession | 19/06/1969 | |
| ROMANIA | Accession | 15/09/1970 | |
| ROMANIA | Reservation | 15/09/1970 | |
| SAINT LUCIA | Accession | 02/09/1986 | |
| SENEGAL | Accession | 02/03/1966 | |
| SEYCHELLES | Succession | 24/07/1985 | |
| SIERRA LEONE | Accession | 13/03/1962 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SOVIET UNION | Accession | 10/01/1966 | |
| SPAIN | Accession | 26/09/1974 | |
| SWEDEN | Accession | 01/02/1960 | |
| TOGO | Succession | 17/03/1976 | |
| TONGA | Succession | 17/03/1976 | |
| TRINIDAD AND TOBAGO | Accession | 19/10/1965 | |
| UGANDA | Accession | 11/08/1983 | |
| UNITED KINGDOM | Ratification | 04/11/1959 | |
| UNITED KINGDOM | Accession | 04/11/1959 | |
| UNITED KINGDOM | Objection | 01/01/1979 | |
| UNITED KINGDOM | Objection | 06/11/1979 | |
| UPPER VOLTA | Accession | 06/04/1962 | |
| YUGOSLAVIA | Accession | 08/04/1964 | |
| ZAMBIA | Succession | 16/06/1975 | |
| ZIMBABWE | Accession | 05/03/1991 | 05/03/1991 |