| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 22/02/1922 | |
| BELGIUM | Ratification | 30/03/1923 | |
| CZECHOSLOVAKIA | Signature | 22/02/1922 | |
| CZECHOSLOVAKIA | Ratification | 21/06/1923 | |
| FRANCE | Signature | 22/02/1922 | |
| FRANCE | Ratification | 31/03/1923 | |
| GERMANY | Signature | 22/02/1922 | |
| GERMANY | Ratification | 30/06/1923 | |
| ITALY | Signature | 22/02/1922 | |
| ITALY | Ratification | 31/03/1923 | |
| UNITED KINGDOM | Signature | 22/02/1922 | |
| UNITED KINGDOM | Ratification | 13/12/1922 |