| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| FRANCE | Signature | 04/11/1911 | |
| FRANCE | Ratification | 12/03/1912 | |
| GERMANY | Signature | 04/11/1911 | |
| GERMANY | Ratification | 12/03/1912 | |
| UNITED KINGDOM | Signature | 04/11/1911 | |
| UNITED KINGDOM | Ratification | 14/11/1911 | |
| UNITED KINGDOM | Adherence | 14/11/1911 |