| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | Signature | 23/07/1921 | |
| AUSTRIA | Ratification | 30/06/1922 | |
| BELGIUM | Signature | 23/07/1921 | |
| BELGIUM | Ratification | 31/03/1922 | |
| BULGARIA | Signature | 23/07/1921 | |
| BULGARIA | Ratification | 30/06/1922 | |
| CZECHOSLOVAKIA | Signature | 23/07/1921 | |
| CZECHOSLOVAKIA | Ratification | 28/06/1922 | |
| FRANCE | Signature | 23/07/1921 | |
| FRANCE | Ratification | 30/06/1922 | |
| GERMANY | Signature | 19/09/1921 | |
| GERMANY | Ratification | 30/06/1922 | |
| GREECE | Signature | 23/07/1921 | |
| GREECE | Ratification | 21/06/1922 | |
| HUNGARY | Signature | 23/07/1921 | |
| HUNGARY | Ratification | 30/06/1922 | |
| ITALY | Signature | 23/07/1921 | |
| ITALY | Ratification | 30/06/1922 | |
| ROUMANIA | Signature | 23/07/1921 | |
| ROUMANIA | Ratification | 19/05/1922 | |
| SERB-CROAT-SLOVENE STATE | Signature | 21/09/1921 | |
| SERB-CROAT-SLOVENE STATE | Ratification | 31/03/1922 | |
| UNITED KINGDOM | Signature | 23/07/1921 | |
| UNITED KINGDOM | Ratification | 31/03/1922 | |