| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Aden Colony | Extension | 20/07/1939 | 20/07/1939 |
| Ashanti | Extension | 27/01/1924 | |
| Australia | Extension | 22/06/1928 | |
| Bahamas | Accession | 27/01/1924 | |
| Barbados | Accession | 27/01/1924 | |
| Basutoland | Extension | 01/08/1932 | |
| Bechuanaland Protectorate | Extension | 01/08/1932 | |
| Bermuda | Accession | 27/01/1924 | |
| British Guiana | Accession | 27/01/1924 | |
| British Honduras | Accession | 27/01/1924 | |
| Canada | Extension | 29/11/1928 | 29/11/1928 |
| Cayman Islands | Accession | 27/01/1924 | |
| Ceylon | Accession | 27/01/1924 | |
| Channel Islands | Extension | 18/04/1935 | 18/04/1935 |
| Cyprus | Accession | 27/01/1924 | |
| Falkland Islands | Extension | 22/06/1928 | |
| Fiji | Accession | 27/01/1924 | |
| FRANCE | Signature | 02/02/1922 | |
| FRANCE | Ratification | 02/05/1922 | 02/07/1922 |
| French Colonies | Extension | 01/01/1923 | |
| French Guiana | Extension | 01/08/1933 | 01/08/1933 |
| French Oceania | Extension | 01/08/1933 | 01/08/1933 |
| Gambia | Extension | 27/01/1924 | |
| Gibraltar | Accession | 27/01/1924 | |
| Gilbert And Ellice Islands | Accession | 27/01/1924 | |
| Gold Coast | Extension | 27/01/1924 | |
| Grenada | Accession | 27/01/1924 | |
| Guinea | Extension | 22/06/1928 | |
| Hong Kong | Accession | 27/01/1924 | |
| Irish Free State | Extension | 27/10/1927 | 27/10/1927 |
| Isle of Man | Extension | 18/04/1935 | 18/04/1935 |
| Jamaica | Accession | 27/01/1924 | |
| Kenya | Extension | 27/01/1924 | |
| Lebanon | Extension | 05/10/1928 | |
| Leeward Islands | Accession | 27/01/1924 | |
| Malay States | Accession | 27/01/1924 | |
| Malta | Accession | 27/01/1924 | |
| Mauritius | Accession | 27/01/1924 | |
| Nauru | Extension | 19/11/1933 | 19/11/1933 |
| New Hebrides | Accession | 27/01/1924 | |
| New Zealand | Extension | 01/01/1928 | 01/01/1928 |
| Newfoundland (UK) | Accession | 22/03/1923 | |
| Nigeria | Extension | 27/01/1924 | |
| Norfolk Island | Extension | 22/06/1928 | |
| North Borneo | Extension | 09/10/1930 | 09/10/1930 |
| Northern Ireland | Extension | 27/10/1927 | 27/10/1927 |
| Northern Rhodesia | Accession | 27/01/1924 | |
| Nyasaland | Accession | 27/01/1924 | |
| Palestine | Accession | 22/03/1923 | |
| Papua | Extension | 22/06/1928 | |
| Sarawak | Extension | 24/10/1930 | 24/10/1930 |
| Scotland | Extension | 01/11/1930 | 01/11/1930 |
| Seychelles | Accession | 27/01/1924 | |
| Sierra Leone | Extension | 27/01/1924 | |
| Solomon Islands | Accession | 27/01/1924 | |
| Somaliland Protectorate | Accession | 27/01/1924 | |
| Southern Rhodesia | Extension | 07/05/1933 | 07/05/1933 |
| Sovereign Base Areas | |||
| St Helena And Ascension | Extension | 22/06/1928 | |
| St Lucia | Accession | 27/01/1924 | |
| St Vincent | Accession | 27/01/1924 | |
| Straits Settlements | Accession | 27/01/1924 | |
| Swaziland | Extension | 01/08/1932 | |
| Syria | Extension | 05/10/1928 | |
| Tanganyika | Accession | 27/01/1924 | |
| Tonga | Extension | 27/01/1924 | |
| Trinidad | Extension | 27/01/1924 | |
| Trinidad And Tobago | Extension | 27/01/1924 | |
| Turks And Caicos Islands | Accession | 27/01/1924 | |
| Uganda | Accession | 27/01/1924 | |
| UNITED KINGDOM | Signature | 02/02/1922 | |
| UNITED KINGDOM | Ratification | 02/05/1922 | 02/07/1922 |
| Western Samoa | Extension | 01/01/1928 | 01/01/1928 |
| Zanzibar | Accession | 27/01/1924 |