| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 10/08/1920 | |
| AUSTRALIA | Ratification | 06/08/1924 | |
| CANADA | Signature | 10/08/1920 | |
| CANADA | Ratification | 06/08/1924 | |
| FRANCE | Signature | 10/08/1920 | |
| FRANCE | Ratification | 30/08/1924 | |
| GREECE | Signature | 10/08/1920 | |
| GREECE | Ratification | 11/02/1924 | |
| INDIA | Signature | 10/08/1920 | |
| INDIA | Ratification | 06/08/1924 | |
| ITALY | Signature | 10/08/1920 | |
| ITALY | Ratification | 06/08/1924 | |
| JAPAN | Signature | 10/08/1920 | |
| NEW ZEALAND | Signature | 10/08/1920 | |
| NEW ZEALAND | Ratification | 06/08/1924 | |
| SOUTH AFRICA | Signature | 10/08/1920 | |
| SOUTH AFRICA | Ratification | 06/08/1924 | |
| UNITED KINGDOM | Signature | 10/08/1920 | |
| UNITED KINGDOM | Ratification | 10/07/1924 | |