| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA-HUNGARY | Signature | 26/10/1912 | |
| BELGIUM | Signature | 26/10/1912 | |
| BULGARIA | Accession | 01/01/1905 | |
| DENMARK | Signature | 26/10/1912 | |
| FRANCE | Signature | 26/10/1912 | |
| GERMANY | Signature | 26/10/1912 | |
| GREECE | Accession | 01/01/1905 | |
| ITALY | Signature | 26/10/1912 | |
| JAPAN | Signature | 26/10/1912 | |
| NETHERLANDS THE | Signature | 26/10/1912 | |
| NORWAY | Signature | 26/10/1912 | |
| PORTUGAL | Signature | 26/10/1912 | |
| RUSSIA | Signature | 26/10/1912 | |
| SPAIN | Signature | 26/10/1912 | |
| SWEDEN | Signature | 26/10/1912 | |
| SWITZERLAND | Signature | 26/10/1912 | |
| TURKEY | Accession | 01/01/1905 | |
| UNITED KINGDOM | Signature | 26/10/1912 | |