| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 13/04/1962 | |
| BELGIUM | Ratification | 30/12/1975 | |
| BELGIUM | Declaration | 30/12/1975 | |
| FRANCE | Signature | 13/04/1962 | |
| FRANCE | Ratification | 16/07/1970 | 16/07/1970 |
| GERMANY FEDERAL REPUBLIC | Signature | 13/04/1962 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 12/06/1970 | 12/06/1970 |
| GERMANY FEDERAL REPUBLIC | Declaration | 12/06/1970 | |
| GREECE | Accession | 20/05/1987 | 01/09/1987 |
| GREECE | Declaration | 20/05/1987 | |
| ITALY | Signature | 13/04/1962 | |
| ITALY | Ratification | 21/06/1965 | 12/06/1970 |
| Land Berlin | Extension | 12/06/1970 | |
| LUXEMBOURG | Signature | 13/04/1962 | |
| LUXEMBOURG | Ratification | 21/10/1964 | 12/06/1970 |
| NETHERLANDS THE | Signature | 13/04/1962 | |
| NETHERLANDS THE | Ratification | 05/04/1963 | 12/06/1970 |
| PORTUGAL | Accession | 31/03/1987 | 01/09/1987 |
| UNITED KINGDOM | Accession | 30/08/1972 | 01/09/1972 |