| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 27/01/1923 | |
| BELGIUM | Ratification | 29/12/1923 | |
| CZECHOSLOVAKIA | Signature | 27/01/1923 | |
| CZECHOSLOVAKIA | Ratification | 30/12/1923 | |
| FRANCE | Signature | 27/01/1923 | |
| FRANCE | Ratification | 29/12/1923 | |
| GERMANY | Signature | 27/01/1923 | |
| GERMANY | Ratification | 31/12/1923 | |
| ITALY | Signature | 27/01/1923 | |
| ITALY | Ratification | 31/03/1923 | |
| UNITED KINGDOM | Signature | 27/01/1923 | |
| UNITED KINGDOM | Ratification | 29/12/1923 |