| Country | Action | Action Date | Effective Date |
|---|
| Anguilla | | | |
| British Honduras | Accession | 05/06/1925 | |
| British Virgin Islands | | | |
| Cayman Islands | | | |
| Ceylon | Accession | 05/06/1925 | |
| CZECHOSLOVAKIA | | | |
| Falkland Islands | Accession | 05/06/1925 | |
| Gold Coast | Accession | 05/06/1925 | |
| Hong Kong | Accession | 05/06/1925 | |
| Jamaica | Accession | 05/06/1923 | |
| Kenya | Accession | 05/06/1925 | |
| Leeward Islands | Accession | 05/06/1923 | |
| Malta | Accession | 05/06/1925 | |
| Mauritius | Accession | 05/06/1925 | |
| Montserrat | | | |
| NIGERIA | Accession | 05/06/1925 | |
| Northern Rhodesia | Accession | 05/06/1925 | |
| Nyasaland | Accession | 05/06/1925 | |
| Palestine | Accession | 05/06/1925 | |
| Seychelles | Accession | 05/06/1925 | |
| Sierra Leone | Accession | 05/06/1925 | |
| Tanganyika | Accession | 09/07/1926 | |
| The Gambia | Accession | 05/06/1925 | |
| Trinidad And Tobago | Accession | 05/06/1925 | |
| Turks And Caicos Islands | | | |
| Uganda | Accession | 12/04/1926 | |
| UNITED KINGDOM | Signature | 14/07/1923 | |
| UNITED KINGDOM | Ratification | 01/08/1923 | |
| Windward Islands | Accession | 05/06/1925 | |