| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Signature | 07/11/1951 | |
| FRANCE | Signature | 07/11/1951 | |
| NETHERLANDS THE | Signature | 07/11/1951 | |
| NEW ZEALAND | Signature | 07/11/1951 | |
| UNITED KINGDOM | Signature | 07/11/1951 | |
| UNITED KINGDOM | Withdrawal | 01/01/1995 | 01/01/1995 |
| UNITED STATES OF AMERICA | Signature | 07/11/1951 |