| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 13/05/1964 | |
| BELGIUM | Ratification | 13/08/1969 | |
| CZECH REPUBLIC | Signature | 10/02/2000 | |
| DENMARK | Signature | 16/04/1964 | |
| FRANCE | Signature | 04/10/1976 | |
| GERMANY FEDERAL REPUBLIC | Signature | 16/04/1964 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 27/01/1971 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 27/01/1971 | |
| GREECE | Signature | 25/05/1978 | |
| ITALY | Signature | 16/04/1964 | |
| Land Berlin | Extension | 27/01/1971 | |
| LUXEMBOURG | Signature | 16/04/1964 | |
| LUXEMBOURG | Ratification | 03/04/1968 | |
| NETHERLANDS THE | Signature | 15/07/1964 | |
| NETHERLANDS THE | Ratification | 16/03/1967 | |
| NORWAY | Declaration | 01/01/1905 | |
| NORWAY | Signature | 16/04/1965 | |
| NORWAY | Ratification | 25/03/1966 | |
| PORTUGAL | Signature | 19/11/1981 | |
| PORTUGAL | Ratification | 15/05/1984 | |
| PORTUGAL | Declaration | 15/05/1984 | |
| PORTUGAL | Declaration | 20/11/1987 | |
| SWEDEN | Signature | 16/04/1964 | |
| SWEDEN | Ratification | 25/09/1965 | |
| TURKEY | Notification | 01/01/1905 | |
| TURKEY | Signature | 13/05/1964 | |