| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Signature | 24/02/1938 | |
| Antilles | Extension | | 01/01/1986 |
| ARGENTINA | Signature | 20/07/1938 | |
| Aruba | Extension | | 01/01/1986 |
| AUSTRALIA | Signature | 24/06/1939 | |
| BELGIUM | Signature | 24/11/1937 | |
| CHILE | Signature | 06/01/1938 | |
| COLOMBIA | Signature | 02/06/1938 | |
| Curacao | Extension | 25/01/1938 | |
| DENMARK | Signature | 04/02/1939 | |
| DOMINICAN REPUBLIC | Signature | 05/11/1937 | |
| EGYPT | Signature | 01/03/1938 | |
| ESTONIA | Signature | 08/03/1938 | |
| FINLAND | Signature | 16/09/1938 | |
| GREECE | Signature | 06/04/1938 | |
| GREECE | Reservation | 06/04/1938 | |
| ICELAND | Signature | 04/02/1939 | |
| IRAN | Signature | 27/04/1938 | |
| NETHERLANDS THE | Signature | 25/01/1938 | |
| NORWAY | Signature | 05/02/1938 | |
| SOUTH AFRICA | Signature | 24/01/1938 | |
| Surinam | Extension | 25/01/1938 | |
| SWEDEN | Signature | 25/02/1938 | |
| UNITED KINGDOM | | | |
| West Indies | Extension | 25/01/1938 | |