| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 16/12/1961 | |
| BELGIUM | Acceptance | 15/05/1962 | |
| DENMARK | Signature | 16/12/1961 | |
| DENMARK | Acceptance | 04/06/1962 | |
| FRANCE | Signature | 16/12/1961 | |
| GERMANY FEDERAL REPUBLIC | Signature | 16/12/1961 | |
| GERMANY FEDERAL REPUBLIC | Acceptance | 23/04/1964 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 23/04/1964 | |
| GREECE | Signature | 16/12/1961 | |
| ITALY | Signature | 16/12/1961 | |
| Land Berlin | Extension | 23/04/1964 | |
| LUXEMBOURG | Signature | 16/12/1961 | |
| LUXEMBOURG | Acceptance | 01/04/1963 | |
| NETHERLANDS THE | Signature | 16/12/1961 | |
| NETHERLANDS THE | Acceptance | 19/02/1963 | |
| NORWAY | Signature | 16/12/1961 | |
| NORWAY | Acceptance | 31/05/1967 | |
| SWEDEN | Signature | 16/12/1961 | |
| SWEDEN | Acceptance | 11/05/1962 | |
| UNITED KINGDOM | Signature | 16/12/1961 | |
| UNITED KINGDOM | Acceptance | 10/06/1962 | |