| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| DENMARK | Signature | 16/11/1931 | |
| ESTONIA | Signature | 16/11/1931 | |
| FRANCE | Signature | 16/11/1931 | |
| GERMANY | Signature | 16/11/1931 | |
| India | Signature | 16/11/1931 | |
| India | Ratification | 01/07/1933 | 01/07/1933 |
| JAPAN | Signature | 16/11/1931 | |
| LATVIA | Signature | 16/11/1931 | |
| LITHUANIA | Signature | 16/11/1931 | |
| NETHERLANDS THE | Signature | 16/11/1931 | |
| NORWAY | Signature | 16/11/1931 | |
| SIAM | Signature | 16/11/1931 | |
| SOVIET UNION | Signature | 16/11/1931 | |
| SWEDEN | Signature | 16/11/1931 | |
| UNITED KINGDOM | Signature | 16/11/1931 | |
| UNITED KINGDOM | Declaration | 02/02/1932 |