| Country | Action | Action Date | Effective Date |
|---|
| All Territories under UK Sovereignty | Extension | 04/03/1911 | |
| British African Protectorates | Extension | 10/02/1912 | |
| Cameroons | Extension | 27/02/1928 | |
| Nauru | Extension | 27/02/1928 | |
| New Guinea | Extension | 27/02/1928 | |
| New Zealand | Extension | 08/02/1946 | |
| Palestine, Mandated Territories (exc. Trans-Jordan) | Extension | 27/02/1928 | |
| SIAM | Signature | 04/03/1911 | |
| Solomon Islands Protectorate | Extension | 06/09/1937 | |
| South West Africa | Extension | 27/02/1928 | |
| Tanganyika | Extension | 27/02/1928 | |
| Togoland | Extension | 27/02/1928 | |
| Transjordan | Extension | 07/04/1932 | |
| UNITED KINGDOM | Signature | 04/03/1911 | |
| Western Samoa (UK) | Extension | 27/02/1928 | |
| Zanzibar | Extension | 06/09/1937 | |