| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | Accession | 27/05/1998 | |
| AUSTRIA | Declaration | 27/05/1998 | |
| BELGIUM | Signature | 07/09/1967 | |
| DENMARK | Approval | 04/06/1975 | 04/06/1975 |
| FRANCE | Signature | 07/09/1967 | |
| GERMANY FEDERAL REPUBLIC | Signature | 07/09/1967 | |
| Guernsey, Bailiwick of | Extension | 21/06/1976 | 21/06/1976 |
| IRELAND, REPUBLIC OF | Approval | 04/06/1976 | 04/06/1976 |
| Isle of Man | Extension | 21/06/1976 | 21/06/1976 |
| ITALY | Signature | 07/09/1967 | |
| Jersey | Extension | 21/06/1976 | 21/06/1976 |
| LUXEMBOURG | Signature | 07/09/1967 | |
| LUXEMBOURG | Ratification | 13/05/1975 | |
| NETHERLANDS THE | Signature | 07/09/1967 | |
| NETHERLANDS THE | Ratification | 10/05/1976 | |
| PORTUGAL | Accession | 01/12/1994 | 01/12/1994 |
| UNITED KINGDOM | Approval | 21/06/1976 | 21/06/1976 |