| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 29/09/1938 | |
| BRAZIL | Signature | 29/09/1938 | |
| BRAZIL | Ratification | 13/11/1941 | |
| CZECHOSLOVAKIA | Signature | 29/09/1938 | |
| DENMARK | Signature | 29/09/1938 | |
| FRANCE | Signature | 29/09/1938 | |
| GERMANY | Signature | 29/09/1938 | |
| GUATEMALA | Signature | 29/09/1938 | |
| GUATEMALA | Ratification | 06/07/1939 | |
| INDIA | Signature | 29/09/1938 | |
| ITALY | Signature | 20/09/1938 | |
| LUXEMBOURG | Signature | 20/09/1938 | |
| NETHERLANDS THE | Signature | 20/09/1938 | |
| NEW ZEALAND | Signature | 29/09/1938 | |
| POLAND | Signature | 20/09/1938 | |
| ROUMANIA | Signature | 29/09/1938 | |
| SAN MARINO | Signature | 29/09/1938 | |
| SWITZERLAND | Signature | 29/09/1938 | |
| UNITED KINGDOM | Signature | 29/09/1938 | |
| UNITED STATES OF AMERICA | Signature | 29/09/1938 | |