| Country | Action | Action Date | Effective Date |
|---|
| British African Protectorates | Extension | 29/08/1910 | |
| Cameroons | Extension | 13/02/1928 | |
| Malay States, Unfederated | Extension | 19/11/1934 | |
| Nauru | Extension | 13/02/1928 | |
| New Guinea | Extension | 13/02/1928 | |
| Palestine, Mandated Territories (exc. Trans-Jordan) | Extension | 13/02/1928 | |
| South West Africa | Extension | 13/02/1928 | |
| SPAIN | Ratification | 30/07/1878 | |
| Tanganyika | Extension | 13/02/1928 | |
| Togoland | Extension | 13/02/1928 | |
| Transjordan | Extension | 23/03/1932 | |
| UNITED KINGDOM | Ratification | 25/07/1878 | |
| Western Samoa (UK) | Extension | 13/02/1928 | |