| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Signature | 06/10/1938 | |
| CANADA | Signature | 06/10/1938 | |
| GERMANY | Signature | 06/10/1938 | |
| HUNGARY | Signature | 06/10/1938 | |
| ITALY | Signature | 06/10/1938 | |
| NETHERLANDS THE | Signature | 06/10/1938 | |
| NEW ZEALAND | Signature | 06/10/1938 | |
| UNITED KINGDOM | Signature | 06/10/1938 | |
| UNITED STATES OF AMERICA | Signature | 06/10/1938 | |
| VENEZUELA | Signature | 06/10/1938 |