| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Bahamas | Extension | 09/10/1962 | |
| CANADA | Signature | 15/11/1950 | |
| CANADA | Ratification | 09/04/1957 | |
| CUBA | Signature | 15/11/1950 | |
| CUBA | Ratification | 17/02/1953 | |
| DOMINICAN REPUBLIC | Signature | 15/11/1950 | |
| DOMINICAN REPUBLIC | Ratification | 04/05/1961 | |
| UNITED KINGDOM | Signature | 15/11/1950 | |
| UNITED KINGDOM | Ratification | 09/10/1962 | |
| UNITED STATES OF AMERICA | Signature | 15/11/1950 | |
| UNITED STATES OF AMERICA | Ratification | 04/04/1960 |