| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Signature | 16/07/1927 | |
| BULGARIA | Signature | 16/07/1927 | |
| DENMARK | Signature | 16/07/1927 | |
| FRANCE | Signature | 16/07/1927 | |
| GREECE | Signature | 16/07/1927 | |
| ITALY | Signature | 16/07/1927 | |
| JAPAN | Signature | 16/07/1927 | |
| MEXICO | Signature | 16/07/1927 | |
| MONACO | Signature | 16/07/1927 | |
| MOROCCO | Signature | 16/07/1927 | |
| SERB-CROAT-SLOVENE STATE | Signature | 16/07/1927 | |
| SOVIET UNION | Signature | 16/07/1927 | |
| TUNIS | Signature | 16/07/1927 | |
| TURKEY | Signature | 16/07/1927 | |
| UNITED KINGDOM | Signature | 16/07/1927 | |
| URUGUAY | Signature | 16/07/1927 |