| Country | Action | Action Date | Effective Date |
|---|
| ABYSSINIA | Signature | 17/06/1925 | |
| AUSTRIA | Signature | 17/06/1925 | |
| BELGIUM | Signature | 17/06/1925 | |
| BRAZIL | Signature | 17/06/1925 | |
| BRITISH EMPIRE | Signature | 17/06/1925 | |
| BULGARIA | Signature | 17/06/1925 | |
| CANADA | Signature | 17/06/1925 | |
| CHILE | Signature | 17/06/1925 | |
| CHINA | Signature | 17/06/1925 | |
| Curacao | Extension | 17/06/1925 | |
| CZECHOSLOVAKIA | Signature | 17/06/1925 | |
| DENMARK | Signature | 17/06/1925 | |
| EGYPT | Signature | 17/06/1925 | |
| ESTONIA | Signature | 17/06/1925 | |
| ESTONIA | Reservation | 17/06/1925 | |
| FINLAND | Signature | 17/06/1925 | |
| FINLAND | Reservation | 17/06/1925 | |
| FRANCE | Signature | 17/06/1925 | |
| GERMANY | Signature | 17/06/1925 | |
| HUNGARY | Signature | 17/06/1925 | |
| INDIA | Signature | 17/06/1925 | |
| ITALY | Signature | 17/06/1925 | |
| JAPAN | Signature | 17/06/1925 | |
| LATVIA | Signature | 17/06/1925 | |
| LATVIA | Reservation | 17/06/1925 | |
| LUXEMBOURG | Signature | 17/06/1925 | |
| NETHERLANDS THE | Signature | 17/06/1925 | |
| NORWAY | Signature | 17/06/1925 | |
| POLAND | Signature | 17/06/1925 | |
| POLAND | Reservation | 17/06/1925 | |
| ROUMANIA | Signature | 17/06/1925 | |
| ROUMANIA | Reservation | 17/06/1925 | |
| SALVADOR | Signature | 17/06/1925 | |
| SERB-CROAT-SLOVENE STATE | Signature | 17/06/1925 | |
| SIAM | Signature | 17/06/1925 | |
| SPAIN | Signature | 17/06/1925 | |
| Surinam | Extension | 17/06/1925 | |
| SWEDEN | Signature | 17/06/1925 | |
| SWITZERLAND | Signature | 17/06/1925 | |
| UNITED KINGDOM | Signature | 17/06/1925 | |
| UNITED STATES OF AMERICA | Signature | 17/06/1925 | |
| URUGUAY | Signature | 17/06/1925 | |
| VENEZUELA | Signature | 17/06/1925 | |
| West Indies | Extension | 17/06/1925 | |