| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 09/03/1964 | |
| BELGIUM | Ratification | 10/02/1966 | |
| DENMARK | Signature | 09/03/1964 | |
| DENMARK | Ratification | 09/10/1964 | |
| FRANCE | Signature | 09/03/1964 | |
| FRANCE | Ratification | 05/07/1965 | |
| GERMANY FEDERAL REPUBLIC | Signature | 09/03/1964 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 19/01/1970 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 19/01/1970 | |
| Guernsey, Bailiwick of | Extension | 11/09/1964 | |
| IRELAND, REPUBLIC OF | Signature | 09/03/1964 | |
| IRELAND, REPUBLIC OF | Ratification | 20/09/1965 | |
| Isle of Man | Extension | 11/09/1964 | |
| ITALY | Signature | 09/03/1964 | |
| ITALY | Ratification | 25/03/1965 | |
| Jersey, Bailiwick of | Extension | 11/09/1964 | |
| Land Berlin | Extension | 19/01/1970 | |
| LUXEMBOURG | Signature | 09/03/1964 | |
| NETHERLANDS THE | Signature | 09/03/1964 | |
| NETHERLANDS THE | Ratification | 20/07/1971 | |
| POLAND | Accession | 07/06/1966 | |
| POLAND | Objection | 07/06/1966 | |
| PORTUGAL | Signature | 09/03/1964 | |
| PORTUGAL | Ratification | 15/03/1966 | |
| SPAIN | Signature | 09/03/1964 | |
| SPAIN | Ratification | 15/09/1965 | |
| SWEDEN | Signature | 09/03/1964 | |
| SWEDEN | Ratification | 16/02/1966 | |
| UNITED KINGDOM | Signature | 09/03/1964 | |
| UNITED KINGDOM | Ratification | 11/09/1964 | |
| UNITED KINGDOM | Denunciation | 03/07/2017 | 31/01/2020 |