| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRIA-HUNGARY | Signature | 30/08/1888 | |
| BELGIUM | Signature | 30/08/1888 | |
| GERMANY | Signature | 30/08/1888 | |
| ITALY | Signature | 30/08/1888 | |
| NETHERLANDS THE | Signature | 30/08/1888 | |
| RUSSIA | Signature | 30/08/1888 | |
| SPAIN | Signature | 30/08/1888 | |
| UNITED KINGDOM | Signature | 30/08/1888 |