| Country | Action | Action Date | Effective Date |
|---|
| Australia | Signature | 22/04/1930 | |
| Australia | Ratification | 27/10/1930 | |
| Canada | Signature | 22/04/1930 | |
| Canada | Ratification | 27/10/1930 | |
| FRANCE | Signature | 22/04/1930 | |
| FRANCE | Ratification | 06/11/1936 | |
| India | Signature | 22/04/1930 | |
| India | Ratification | 27/10/1930 | |
| Irish Free State | Signature | 22/04/1930 | |
| Irish Free State | Ratification | 31/12/1930 | |
| ITALY | Signature | 22/04/1930 | |
| ITALY | Ratification | 06/11/1936 | |
| JAPAN | Signature | 22/04/1930 | |
| JAPAN | Ratification | 27/10/1930 | |
| New Zealand | Signature | 22/04/1930 | |
| New Zealand | Ratification | 27/10/1930 | |
| South Africa | Signature | 22/04/1930 | |
| South Africa | Ratification | 27/10/1930 | |
| UNITED KINGDOM | Signature | 22/04/1930 | |
| UNITED KINGDOM | Ratification | 27/10/1930 | |
| UNITED STATES OF AMERICA | Signature | 22/04/1930 | |
| UNITED STATES OF AMERICA | Ratification | 27/10/1930 | |