| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 06/02/1922 | |
| AUSTRALIA | Ratification | 05/08/1925 | |
| BELGIUM | Signature | 06/02/1922 | |
| BELGIUM | Ratification | 05/08/1925 | |
| BRITISH EMPIRE | Signature | 06/02/1922 | |
| BRITISH EMPIRE | Ratification | 05/08/1925 | |
| CANADA | Signature | 06/02/1922 | |
| CANADA | Ratification | 05/08/1925 | |
| CHINA | Signature | 06/02/1922 | |
| CHINA | Ratification | 05/08/1925 | |
| DENMARK | Accession | 27/08/1925 | |
| FRANCE | Signature | 06/02/1922 | |
| FRANCE | Ratification | 05/08/1925 | |
| INDIA | Signature | 06/02/1922 | |
| INDIA | Ratification | 05/08/1925 | |
| ITALY | Signature | 06/02/1922 | |
| ITALY | Ratification | 05/08/1925 | |
| JAPAN | Signature | 06/02/1922 | |
| JAPAN | Ratification | 05/08/1925 | |
| NETHERLANDS THE | Signature | 06/02/1922 | |
| NETHERLANDS THE | Ratification | 05/08/1925 | |
| NEW ZEALAND | Signature | 06/02/1922 | |
| NEW ZEALAND | Ratification | 05/08/1925 | |
| NORWAY | Accession | 23/09/1925 | |
| PORTUGAL | Signature | 06/02/1922 | |
| PORTUGAL | Ratification | 05/08/1925 | |
| SOUTH AFRICA | Signature | 06/02/1922 | |
| SOUTH AFRICA | Ratification | 05/08/1925 | |
| SPAIN | Accession | 21/09/1925 | |
| SWEDEN | Accession | 11/09/1925 | |
| UNITED KINGDOM | Signature | 06/02/1922 | |
| UNITED KINGDOM | Ratification | 05/08/1925 | |
| UNITED STATES OF AMERICA | Signature | 06/02/1922 | |
| UNITED STATES OF AMERICA | Ratification | 05/08/1925 | |