| Country | Action | Action Date | Effective Date |
|---|
| BELGIUM | Signature | 04/05/1896 | |
| BELGIUM | Ratification | 09/09/1897 | |
| FRANCE | Signature | 04/05/1896 | |
| FRANCE | Ratification | 09/09/1897 | |
| GERMANY | Signature | 04/05/1896 | |
| GERMANY | Ratification | 09/09/1897 | |
| HAITI | Accession | 17/01/1898 | |
| ITALY | Signature | 04/05/1896 | |
| ITALY | Ratification | 09/09/1897 | |
| LIBERIA | Accession | 16/10/1908 | |
| LUXEMBOURG | Signature | 04/05/1896 | |
| LUXEMBOURG | Ratification | 09/09/1897 | |
| MONACO | Signature | 04/05/1896 | |
| MONACO | Ratification | 09/09/1897 | |
| MONTENEGRO | Signature | 04/05/1896 | |
| MONTENEGRO | Ratification | 09/09/1897 | |
| SPAIN | Signature | 04/05/1896 | |
| SPAIN | Ratification | 09/09/1897 | |
| SWITZERLAND | Signature | 04/05/1896 | |
| SWITZERLAND | Ratification | 09/09/1897 | |
| TUNIS | Signature | 04/05/1896 | |
| TUNIS | Ratification | 09/09/1897 | |
| UNITED KINGDOM | Signature | 04/05/1896 | |
| UNITED KINGDOM | Ratification | 26/04/1897 | |