| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BULGARIA | Signature | 17/09/1937 | |
| EGYPT | Signature | 17/09/1937 | |
| FRANCE | Signature | 17/09/1937 | |
| GREECE | Signature | 17/09/1937 | |
| ROUMANIA | Signature | 17/09/1937 | |
| SOVIET UNION | Signature | 17/09/1937 | |
| TURKEY | Signature | 17/09/1937 | |
| UNITED KINGDOM | Signature | 17/09/1937 | |
| YUGOSLAVIA | Signature | 17/09/1937 |