| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Signature | 30/09/1938 | |
| ARGENTINE REPUBLIC | Signature | 30/09/1938 | |
| AUSTRALIA | Signature | 30/09/1938 | |
| BELGIUM | Signature | 30/09/1938 | |
| BOLIVIA | Signature | 30/09/1938 | |
| BULGARIA | Signature | 30/09/1938 | |
| BULGARIA | Ratification | 01/09/1939 | |
| CANADA | Signature | 30/09/1938 | |
| CHINA | Signature | 30/09/1938 | |
| CHINA | Ratification | 01/04/1939 | |
| COLOMBIA | Signature | 30/09/1938 | |
| CUBA | Signature | 30/09/1938 | |
| DENMARK | Signature | 30/09/1938 | |
| DOMINICAN REPUBLIC | Signature | 30/09/1938 | |
| ECUADOR | Signature | 30/09/1938 | |
| EGYPT | Signature | 30/09/1938 | |
| ESTONIA | Signature | 30/09/1938 | |
| ESTONIA | Ratification | 04/05/1939 | |
| FINLAND | Signature | 30/09/1938 | |
| FINLAND | Ratification | 02/05/1939 | |
| FRANCE | Signature | 30/09/1938 | |
| GREECE | Signature | 30/09/1938 | |
| HAYTI | Signature | 30/09/1938 | |
| HUNGARY | Signature | 30/09/1938 | |
| INDIA | Signature | 30/09/1938 | |
| INDIA | Ratification | 03/04/1939 | |
| IRAN | Signature | 30/09/1938 | |
| IRAQ | Signature | 30/09/1938 | |
| IRAQ | Ratification | 31/03/1941 | |
| IRELAND, REPUBLIC OF | Signature | 30/09/1938 | |
| LATVIA | Signature | 30/09/1938 | |
| LATVIA | Ratification | 15/03/1939 | |
| LITHUANIA | Signature | 30/09/1938 | |
| LITHUANIA | Ratification | 20/02/1940 | |
| MEXICO | Signature | 30/09/1938 | |
| MEXICO | Ratification | 12/04/1939 | |
| NETHERLANDS THE | Signature | 30/09/1938 | |
| NETHERLANDS THE | Ratification | 10/10/1939 | |
| NEW ZEALAND | Signature | 30/09/1938 | |
| NEW ZEALAND | Ratification | 05/06/1939 | |
| NORWAY | Signature | 30/09/1938 | |
| NORWAY | Ratification | 29/03/1939 | |
| PANAMA | Signature | 30/09/1938 | |
| PERU | Signature | 30/09/1938 | |
| POLAND | Signature | 30/09/1938 | |
| POLAND | Ratification | 07/08/1939 | |
| PORTUGAL | Signature | 30/09/1938 | |
| ROUMANIA | Signature | 30/09/1938 | |
| ROUMANIA | Ratification | 07/03/1939 | |
| SOUTH AFRICA | Signature | 30/09/1938 | |
| SOUTH AFRICA | Ratification | 25/07/1939 | |
| SPAIN | Signature | 30/09/1938 | |
| SWEDEN | Signature | 30/09/1938 | |
| SWEDEN | Ratification | 07/07/1939 | |
| SWITZERLAND | Signature | 30/09/1938 | |
| SWITZERLAND | Ratification | 21/10/1939 | |
| THAILAND | Signature | 30/09/1938 | |
| UNITED KINGDOM | Signature | 30/09/1938 | |
| UNITED KINGDOM | Ratification | 20/01/1939 | |
| URUGUAY | Signature | 30/09/1938 | |