| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Accession | 30/10/1969 | |
| AUSTRIA | Signature | 25/02/1961 | |
| AUSTRIA | Ratification | 10/08/1964 | |
| BELGIUM | Signature | 25/02/1961 | |
| BELGIUM | Ratification | 17/03/1964 | |
| BULGARIA | Signature | 25/02/1961 | |
| BULGARIA | Ratification | 29/04/1963 | |
| CZECHOSLOVAKIA | Signature | 25/02/1961 | |
| CZECHOSLOVAKIA | Ratification | 14/03/1963 | |
| DENMARK | Signature | 25/02/1961 | |
| DENMARK | Ratification | 13/09/1961 | |
| FINLAND | Signature | 25/02/1961 | |
| FINLAND | Ratification | 14/04/1964 | |
| FRANCE | Statement | 01/01/1905 | |
| FRANCE | Signature | 25/02/1961 | |
| FRANCE | Ratification | 30/05/1962 | |
| GERMAN DEMOCRATIC REPUBLIC | Notification | 24/12/1964 | 01/01/1965 |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 01/04/1973 | |
| GERMANY FEDERAL REPUBLIC | Notification | 24/12/1964 | 01/01/1965 |
| GERMANY FEDERAL REPUBLIC | Accession | 01/04/1973 | |
| GREECE | Signature | 25/02/1961 | |
| GREECE | Ratification | 29/07/1969 | |
| HUNGARY | Signature | 25/02/1961 | |
| HUNGARY | Ratification | 29/03/1962 | |
| IRAN | Accession | 09/03/1968 | |
| IRAQ | Accession | 24/08/1965 | |
| IRELAND, REPUBLIC OF | Accession | 01/02/1970 | |
| ITALY | Signature | 25/02/1961 | |
| ITALY | Ratification | 12/11/1963 | |
| LEBANON | Signature | 25/02/1961 | |
| LIECHTENSTEIN | Signature | 25/02/1961 | |
| LIECHTENSTEIN | Ratification | 24/10/1963 | |
| LUXEMBOURG | Signature | 25/02/1961 | |
| LUXEMBOURG | Ratification | 26/11/1964 | |
| MOROCCO | Accession | 01/01/1965 | |
| NETHERLANDS THE | Signature | 25/02/1961 | |
| NETHERLANDS THE | Ratification | 26/09/1963 | |
| NORWAY | Signature | 25/02/1961 | |
| NORWAY | Ratification | 09/08/1963 | |
| POLAND | Signature | 25/02/1961 | |
| POLAND | Ratification | 04/11/1963 | |
| PORTUGAL | Signature | 25/02/1961 | |
| PORTUGAL | Ratification | 04/12/1963 | |
| ROMANIA | Signature | 25/02/1961 | |
| ROMANIA | Ratification | 14/08/1962 | |
| SPAIN | Signature | 25/02/1961 | |
| SPAIN | Ratification | 19/02/1963 | |
| SWEDEN | Signature | 25/02/1961 | |
| SWEDEN | Ratification | 27/06/1963 | |
| SWITZERLAND | Signature | 25/02/1961 | |
| SWITZERLAND | Ratification | 25/07/1962 | |
| SYRIA | Accession | 07/05/1965 | |
| TUNISIA | Accession | 21/11/1965 | |
| TURKEY | Signature | 25/02/1961 | |
| TURKEY | Ratification | 31/01/1966 | |
| UNITED KINGDOM | Statement | 01/01/1905 | |
| UNITED KINGDOM | Signature | 25/02/1961 | |
| UNITED KINGDOM | Ratification | 09/04/1964 | |
| YUGOSLAVIA | Signature | 25/02/1961 | |
| YUGOSLAVIA | Ratification | 21/02/1964 |