| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 06/06/1955 | |
| FRANCE | Signature | 06/06/1955 | |
| GERMANY FEDERAL REPUBLIC | Signature | 06/06/1955 | |
| ISRAEL | Signature | 06/06/1955 | |
| ITALY | Signature | 06/06/1955 | |
| LUXEMBOURG | Signature | 06/06/1955 | |
| NETHERLANDS THE | Signature | 06/06/1955 | |
| UNITED KINGDOM | Signature | 06/06/1955 | |
| UNITED STATES OF AMERICA | Signature | 06/06/1955 |