| Country | Action | Action Date | Effective Date |
|---|
| All Territories under UK Sovereignty | Extension | 26/11/1880 | |
| British African Protectorates | Extension | 23/08/1909 | |
| Cameroons | Extension | 19/09/1929 | |
| Malay States, Unfederated | Extension | 04/01/1935 | |
| Nauru | Extension | 19/09/1929 | |
| New Guinea | Extension | 19/09/1929 | |
| Palestine, Mandated Territories (exc. Trans-Jordan) | Extension | 19/09/1929 | |
| South West Africa | Extension | 19/09/1929 | |
| SWITZERLAND | Signature | 26/11/1880 | |
| SWITZERLAND | Ratification | 15/03/1881 | |
| Tanganyika | Extension | 19/09/1929 | |
| Togoland | Extension | 19/09/1929 | |
| UNITED KINGDOM | Signature | 26/11/1880 | |
| UNITED KINGDOM | Ratification | 15/03/1881 | |
| Western Samoa (UK) | Extension | 19/09/1929 | |