| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 05/09/1972 | |
| Antilles And Suriname | Extension | 17/01/1964 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Accession | 04/12/1967 | |
| AUSTRIA | Signature | 30/10/1961 | |
| AUSTRIA | Ratification | 05/10/1962 | |
| BELGIUM | Accession | 07/09/1965 | |
| BULGARIA | Accession | 31/07/1964 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 01/04/1962 | |
| CROATIA | Accession | 29/09/1994 | 29/12/1994 |
| CUBA | Signature | 28/02/1962 | |
| CUBA | Ratification | 03/12/1962 | |
| CYPRUS | Accession | 15/12/1972 | 15/03/1973 |
| CZECHOSLOVAKIA | Definitive Signature | 28/03/1962 | |
| DENMARK | Signature | 27/03/1962 | |
| DENMARK | Ratification | 14/04/1965 | |
| District Of Columbia | Extension | 03/12/1968 | |
| EGYPT | Accession | 25/03/1963 | |
| FINLAND | Accession | 01/08/1964 | |
| FRANCE | Definitive Signature | 31/03/1962 | |
| GERMANY FEDERAL REPUBLIC | Signature | 08/03/1962 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 11/07/1969 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 11/07/1969 | |
| GREECE | Accession | 19/07/1962 | |
| Guernsey, Bailiwick of | Extension | 25/03/1963 | |
| Hong Kong | Accession | 14/12/1973 | 14/03/1974 |
| HUNGARY | Accession | 04/02/1963 | |
| ICELAND | Accession | 08/12/1970 | |
| IRAN | Signature | 16/02/1962 | |
| IRAN | Definitive Signature | 16/04/1968 | |
| IRELAND, REPUBLIC OF | Accession | 15/04/1965 | |
| Isle of Man | Extension | 25/03/1963 | |
| ISRAEL | Accession | 01/02/1966 | |
| ITALY | Signature | 07/12/1961 | |
| ITALY | Ratification | 20/09/1963 | |
| JAPAN | Accession | 01/08/1973 | 01/11/1973 |
| Jersey, Bailiwick of | Extension | 25/03/1963 | |
| KENYA | Accession | 31/08/1983 | 30/11/1983 |
| KOREA REPUBLIC OF | Accession | 04/04/1978 | 04/07/1978 |
| Land Berlin | Extension | 11/07/1969 | |
| LEBANON | Accession | 11/12/1979 | 11/03/1980 |
| LESOTHO | Accession | 27/01/1982 | 27/04/1982 |
| LIECHTENSTEIN | Extension | 30/04/1963 | |
| LUXEMBOURG | Accession | 28/01/1966 | |
| MALAGASY REPUBLIC | Accession | 12/04/1962 | |
| MALTA | Accession | 11/05/1988 | 11/08/1988 |
| NETHERLANDS THE | Accession | 17/01/1964 | |
| NETHERLANDS THE | Declaration | 17/01/1964 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| NEW ZEALAND | Accession | 17/05/1977 | |
| NIGER | Definitive Signature | 14/03/1962 | |
| NORWAY | Definitive Signature | 30/03/1962 | |
| POLAND | Accession | 19/07/1969 | |
| POLAND | Objection | 19/07/1969 | |
| PORTUGAL | Signature | 15/03/1962 | |
| PORTUGAL | Ratification | 02/06/1964 | |
| Puerto Rico | Extension | 03/12/1968 | |
| ROMANIA | Accession | 26/03/1968 | |
| SLOVENIA | Accession | 23/11/1992 | 23/02/1993 |
| SOUTH AFRICA | Accession | 28/09/1971 | |
| SPAIN | Signature | 21/02/1962 | |
| SPAIN | Ratification | 11/02/1963 | |
| SPAIN | Denunciation | 06/07/1972 | 06/01/1973 |
| SPAIN | Notification | 24/02/1976 | 24/05/1976 |
| SRI LANKA | Accession | 23/05/1991 | 23/08/1991 |
| SWEDEN | Signature | 30/03/1962 | |
| SWEDEN | Ratification | 19/03/1964 | |
| SWITZERLAND | Signature | 07/12/1961 | |
| SWITZERLAND | Ratification | 30/04/1963 | |
| THAILAND | Accession | 30/09/1994 | 30/12/1994 |
| TRINIDAD AND TOBAGO | Accession | 05/01/1981 | 05/04/1981 |
| TUNISIA | Accession | 21/04/1972 | |
| TURKEY | Signature | 31/03/1962 | |
| TURKEY | Ratification | 23/08/1974 | 23/11/1974 |
| UGANDA | Accession | 11/07/1989 | 11/10/1989 |
| UNITED KINGDOM | Signature | 27/02/1962 | |
| UNITED KINGDOM | Ratification | 25/03/1963 | |
| UNITED KINGDOM | Declaration | 25/03/1963 | |
| UNITED KINGDOM | Declaration | 14/12/1973 | 14/03/1974 |
| UNITED STATES OF AMERICA | Accession | 03/12/1968 | |
| UNITED STATES OF AMERICA | Declaration | 03/12/1968 | |
| YUGOSLAVIA | Accession | 05/11/1963 | |
| ZIMBABWE | Accession | 18/02/1987 | 18/05/1987 |