| Country | Action | Action Date | Effective Date |
|---|
| Australia | | | |
| Bahamas | | | |
| Barbados | | | |
| Basutoland | | | |
| Bechuanaland | | | |
| Bermuda | | | |
| British Guiana | | | |
| British Honduras | | | |
| Cape Of Good Hope | | | |
| Ceylon | | | |
| Cyprus | | | |
| Falkland Islands | | | |
| Fiji | | | |
| Gambia | | | |
| Gold Coast | | | |
| Guinea | | | |
| Hawaii | Extension | 05/10/1921 | |
| Hong Kong | | | |
| India | | | |
| Jamaica | | | |
| Labuan | | | |
| Leeward Islands | | | |
| Mauritius | | | |
| New Zealand | | | |
| Newfoundland (UK) | | | |
| Nigeria, North | | | |
| Nigeria, South | | | |
| North Borneo | | | |
| Orange River Colony | | | |
| Sierra Leone | | | |
| Southern Rhodesia | | | |
| St Helena | | | |
| Straits Settlements | | | |
| Transvaal | | | |
| Trinidad | | | |
| UNITED KINGDOM | Signature | 02/03/1899 | |
| UNITED KINGDOM | Ratification | 18/06/1900 | |
| UNITED STATES OF AMERICA | Signature | 02/03/1899 | |
| UNITED STATES OF AMERICA | Ratification | 16/07/1900 | |
| Windward Islands | | | |