| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Signature | 01/03/1939 | |
| AUSTRALIA | Signature | 01/03/1939 | |
| BELGIUM | Signature | 01/03/1939 | |
| BULGARIA | Signature | 01/03/1939 | |
| CHINA | Signature | 01/03/1939 | |
| COLOMBIA | Signature | 01/03/1939 | |
| DENMARK | Accession | 17/07/1939 | |
| DOMINICAN REPUBLIC | Signature | 01/03/1939 | |
| FINLAND | Signature | 01/03/1939 | |
| FRANCE | Signature | 01/03/1939 | |
| GERMANY | Signature | 01/03/1939 | |
| GREECE | Signature | 01/03/1939 | |
| GREECE | Reservation | 01/03/1939 | |
| HUNGARY | Signature | 01/03/1939 | |
| INDIA | Signature | 01/03/1939 | |
| ITALY | Signature | 01/03/1939 | |
| LATVIA | Signature | 01/03/1939 | |
| LIBERIA | Signature | 01/03/1939 | |
| LITHUANIA | Signature | 01/03/1939 | |
| LUXEMBOURG | Signature | 01/03/1939 | |
| NETHERLANDS THE | Signature | 01/03/1939 | |
| NEW ZEALAND | Signature | 01/03/1939 | |
| NORWAY | Signature | 01/03/1939 | |
| POLAND | Signature | 01/03/1939 | |
| SOUTH AFRICA | Signature | 01/03/1939 | |
| SOVIET UNION | Signature | 01/03/1939 | |
| SWEDEN | Signature | 01/03/1939 | |
| SWITZERLAND | Signature | 01/03/1939 | |
| TURKEY | Signature | 01/03/1939 | |
| UNITED KINGDOM | Signature | 01/03/1939 | |
| UNITED STATES OF AMERICA | Signature | 01/03/1939 | |