| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | | | |
| British Guiana | Accession | 14/12/1925 | |
| British Honduras | Accession | 05/06/1926 | |
| Ceylon | Accession | 05/06/1926 | |
| Cyprus | Accession | 05/06/1926 | |
| Falkland Islands | Accession | 05/06/1926 | |
| Gold Coast | Accession | 05/06/1926 | |
| Hong Kong | Accession | 05/06/1926 | |
| Jamaica | Accession | 05/06/1926 | |
| Kenya | Accession | 30/03/1937 | |
| Leeward Islands | Accession | 05/06/1926 | |
| Malta | Accession | 05/06/1926 | |
| Mauritius | Accession | 05/06/1926 | |
| Nigeria | Accession | 05/06/1926 | |
| North Borneo | Accession | 25/11/1926 | |
| Northern Rhodesia | Accession | 05/06/1926 | |
| Nyasaland | Accession | 05/06/1926 | |
| Palestine | Accession | 25/11/1926 | |
| Somaliland | Accession | 05/06/1926 | |
| Southern Rhodesia | Accession | 18/06/1925 | |
| Southern Rhodesia | Withdrawal | 18/08/1925 | |
| St Helena | Accession | 05/06/1926 | |
| Straits Settlements | Accession | 05/06/1926 | |
| Tanganyika | Accession | 25/11/1926 | |
| The Gambia | Accession | 05/06/1926 | |
| Trinidad | Accession | 05/06/1926 | |
| Uganda | Accession | 30/03/1937 | |
| UNITED KINGDOM | Signature | 22/05/1924 | |
| UNITED KINGDOM | Ratification | 30/09/1924 | |
| Windward Islands | Accession | 05/06/1926 | |