| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BRAZIL | Signature | 17/02/1930 | |
| CHINA | Signature | 17/02/1930 | |
| FRANCE | Signature | 17/02/1930 | |
| NETHERLANDS THE | Signature | 17/02/1930 | |
| NORWAY | Signature | 17/02/1930 | |
| UNITED KINGDOM | Signature | 17/02/1930 | |
| UNITED STATES OF AMERICA | Signature | 17/02/1930 |