| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| CANADA | Signature | 29/06/1938 | |
| GERMANY | Signature | 29/06/1938 | |
| IRELAND, REPUBLIC OF | Signature | 29/06/1938 | |
| MEXICO | Signature | 29/06/1938 | |
| NEW ZEALAND | Signature | 29/06/1938 | |
| NORWAY | Signature | 29/06/1938 | |
| UNITED KINGDOM | Signature | 29/06/1938 | |
| UNITED STATES OF AMERICA | Signature | 29/06/1938 |