| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 03/08/1959 | |
| BELGIUM | Ratification | 15/05/1963 | |
| CANADA | Signature | 03/08/1959 | |
| CANADA | Ratification | 11/12/1961 | |
| FRANCE | Signature | 03/08/1959 | |
| FRANCE | Ratification | 11/01/1962 | |
| GERMANY FEDERAL REPUBLIC | Signature | 03/08/1959 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 01/06/1963 | |
| NETHERLANDS THE | Signature | 03/08/1959 | |
| NETHERLANDS THE | Ratification | 10/09/1962 | |
| UNITED KINGDOM | Signature | 03/08/1959 | |
| UNITED KINGDOM | Ratification | 09/07/1962 | |
| UNITED STATES OF AMERICA | Signature | 03/08/1959 | |
| UNITED STATES OF AMERICA | Ratification | 28/07/1961 | |