| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Bahamas | |||
| Barbados | |||
| Basutoland | |||
| Bechuanaland | |||
| Bermuda | |||
| British Guiana | |||
| British Honduras | |||
| British Togoland | |||
| Brunei | |||
| Cameroons | |||
| Cayman Islands | |||
| Ceylon | |||
| Channel Islands | |||
| Falkland Island Dependencies | |||
| Falkland Islands | |||
| Fiji | |||
| FRANCE | |||
| GERMANY | |||
| Gibraltar | |||
| Gilbert & Ellice Colony | |||
| Gold Coast | |||
| Hong Kong | |||
| Isle of Man | |||
| Jamaica | |||
| Kenya | |||
| Leeward Islands | |||
| Malay States, Federated | |||
| Malay States, Unfederated | |||
| Malta | |||
| Mauritius | |||
| Montserrat | |||
| Nigeria | |||
| North Borneo | |||
| Northern Ireland | |||
| Northern Rhodesia | |||
| Nyasaland | |||
| Palestine | |||
| Sarawak | |||
| Scotland | |||
| Seychelles | |||
| Sierra Leone | |||
| Somaliland | |||
| St Helena And Ascension | |||
| Straits Settlements | |||
| Swaziland | |||
| Tanganyika | |||
| Tonga | |||
| Trinidad And Tobago | |||
| Turks And Caicos Islands | |||
| Uganda | |||
| UNITED KINGDOM | Signature | 12/07/1926 | |
| Virgin Islands | |||
| Western Pacific Islands | |||
| Windward Islands | |||
| Zanzibar |