| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRIA | Communication | 10/09/1938 | |
| AUSTRIA-HUNGARY | Signature | 26/06/1901 | |
| AUSTRIA-HUNGARY | Ratification | 08/06/1902 | |
| Malay States, Federated | Extension | 27/12/1934 | |
| Malay States, Unfederated | Extension | 27/12/1934 | |
| Solomon Islands Protectorate | Extension | 05/10/1938 | |
| UNITED KINGDOM | Signature | 26/06/1901 | |
| UNITED KINGDOM | Ratification | 11/07/1901 | |
| UNITED KINGDOM | Extension | 14/01/1911 | |
| UNITED KINGDOM | Extension | 01/04/1932 | |
| Zanzibar | Extension | 05/10/1938 |