| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AFGHANISTAN | Accession | 11/10/1971 | |
| ALBANIA | Accession | 01/10/1969 | |
| ALBANIA | Declaration | 01/10/1969 | |
| AUSTRIA | Notification | 01/01/1905 | |
| AUSTRIA | Signature | 15/02/1959 | |
| AUSTRIA | Ratification | 03/02/1960 | |
| BELGIUM | Signature | 04/03/1959 | |
| BELGIUM | Ratification | 14/03/1962 | |
| BULGARIA | Definitive Signature | 15/04/1959 | |
| BULGARIA | Reservation | 15/04/1959 | |
| BULGARIA | Withdrawal Res. | 06/05/1994 | |
| CANADA | Accession | 26/11/1974 | 24/02/1975 |
| CYPRUS | Accession | 03/06/1977 | 01/09/1977 |
| CZECH REPUBLIC | Succession | 01/01/1993 | 02/06/1993 |
| CZECHOSLOVAKIA | Accession | 31/08/1961 | |
| CZECHOSLOVAKIA | Declaration | 31/08/1961 | |
| DENMARK | Definitive Signature | 15/04/1959 | |
| District Of Columbia | Extension | 03/12/1968 | |
| FINLAND | Accession | 14/06/1960 | |
| FRANCE | Signature | 14/04/1959 | |
| FRANCE | Ratification | 03/07/1959 | |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 24/10/1975 | 22/01/1976 |
| GERMAN DEMOCRATIC REPUBLIC | Declaration | 24/10/1977 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 01/01/1905 | |
| GERMANY FEDERAL REPUBLIC | Signature | 13/04/1959 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 23/10/1961 | |
| GREECE | Accession | 02/05/1961 | |
| GREECE | Reservation | 02/05/1961 | |
| GREECE | Withdrawal Res. | 16/08/1971 | |
| HUNGARY | Withdrawal Dec. | 01/01/1905 | 03/10/1990 |
| HUNGARY | Accession | 06/12/1961 | |
| HUNGARY | Declaration | 06/12/1961 | |
| IRAN | Accession | 25/04/1971 | |
| IRELAND, REPUBLIC OF | Accession | 07/07/1967 | |
| Isle of Man | Extension | 09/10/1959 | 07/01/1960 |
| ISRAEL | Accession | 31/10/1969 | 29/01/1970 |
| ITALY | Signature | 15/04/1959 | |
| ITALY | Ratification | 11/01/1963 | |
| JAPAN | Accession | 14/05/1971 | |
| JORDAN | Accession | 08/11/1973 | |
| KUWAIT | Accession | 26/05/1977 | 24/08/1977 |
| Land Berlin | Extension | 01/01/1905 | |
| LIECHTENSTEIN | Ratification | 07/07/1960 | |
| LUXEMBOURG | Signature | 14/04/1959 | |
| LUXEMBOURG | Ratification | 03/07/1962 | |
| MALTA | Accession | 31/01/1978 | 01/05/1978 |
| MALTA | Declaration | 31/01/1978 | |
| MOROCCO | Accession | 10/10/1975 | 08/01/1976 |
| NORWAY | Accession | 02/03/1960 | |
| POLAND | Accession | 03/10/1961 | |
| POLAND | Declaration | 03/10/1961 | |
| PORTUGAL | Accession | 15/01/1968 | |
| PORTUGAL | Communication | 31/07/1978 | |
| Puerto Rico | Extension | 03/12/1968 | |
| ROMANIA | Accession | 09/04/1964 | |
| ROMANIA | Declaration | 09/04/1964 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SOVIET UNION | Accession | 20/02/1974 | 21/05/1974 |
| SOVIET UNION | Declaration | 20/02/1974 | |
| SPAIN | Accession | 12/05/1961 | |
| SWEDEN | Definitive Signature | 14/04/1959 | |
| SWITZERLAND | Signature | 12/03/1959 | |
| SWITZERLAND | Ratification | 07/07/1960 | |
| SWITZERLAND | Declaration | 07/07/1960 | |
| TURKEY | Accession | 23/02/1966 | |
| TURKEY | Withdrawal Res. | 12/02/1974 | |
| UNITED KINGDOM | Signature | 13/04/1959 | |
| UNITED KINGDOM | Ratification | 09/10/1959 | |
| UNITED KINGDOM | Declaration | 09/10/1959 | 07/01/1960 |
| UNITED KINGDOM | Notification | 01/01/1971 | |
| UNITED STATES OF AMERICA | Accession | 03/12/1968 | |
| UNITED STATES OF AMERICA | Declaration | 03/12/1968 | |
| YUGOSLAVIA | Accession | 23/08/1960 |