| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Anguilla | Accession | 17/02/1927 | |
| Australia | Accession | 09/11/1933 | |
| Bahamas | Accession | 17/02/1927 | |
| Basutoland | Accession | 10/09/1931 | 01/01/1900 |
| Bechuanaland | Accession | 10/09/1931 | 01/01/1900 |
| Bermuda | Accession | 17/02/1927 | |
| British Guiana | Accession | 17/02/1927 | |
| British Honduras | Accession | 17/02/1927 | |
| Canada | Accession | 21/12/1928 | |
| Cayman Islands | Accession | 01/08/1927 | |
| Ceylon | Accession | 17/02/1927 | |
| Channel Islands | Extension | 26/04/1935 | |
| Cyprus | Accession | 11/11/1924 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | |
| CZECHOSLOVAKIA | Signature | 11/11/1924 | |
| CZECHOSLOVAKIA | Ratification | 29/03/1926 | |
| Falkland Islands | Accession | 11/11/1924 | |
| Fiji | Accession | 11/11/1924 | |
| Gibraltar | Accession | 17/02/1927 | |
| Gold Coast | Accession | 17/02/1927 | |
| Hong Kong | Accession | 17/02/1927 | |
| Isle of Man | Accession | 26/04/1935 | |
| Jamaica | Accession | 17/02/1927 | |
| Kenya | Accession | 17/02/1927 | |
| Leeward Islands | Accession | 17/02/1927 | |
| Malay States, Federated | Accession | 17/02/1927 | |
| Malay States, Unfederated | Accession | 17/02/1927 | |
| Malta | Accession | 17/07/1927 | |
| Mauritius | Accession | 02/07/1927 | |
| New Zealand | Accession | 08/03/1936 | |
| Newfoundland (UK) | Accession | 27/10/1934 | |
| Nigeria | Accession | 11/11/1924 | |
| North Borneo | Accession | 11/11/1924 | 07/04/1931 |
| Northern Rhodesia | Accession | 11/11/1924 | |
| Nyasaland | Accession | 11/11/1924 | |
| Palestine | Accession | 17/02/1927 | |
| Sarawak | Accession | 26/06/1931 | |
| Scotland | Accession | 07/11/1930 | |
| Seychelles | Accession | 17/02/1927 | |
| Sierra Leone | Accession | 17/02/1927 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | |
| Somaliland Protectorate | Accession | 17/02/1927 | |
| South Africa | Accession | 10/09/1931 | |
| Southern Rhodesia | Accession | 18/05/1933 | |
| St Helena And Ascension | Accession | 17/02/1927 | |
| Straits Settlements | Accession | 17/02/1927 | |
| Swaziland | Accession | 10/09/1931 | 01/01/1900 |
| Tanganyika | Signature | 17/02/1927 | |
| The Gambia | Accession | 17/02/1927 | |
| Tonga | Accession | 17/02/1927 | |
| Trinidad And Tobago | Accession | 17/02/1927 | |
| Turks And Caicos Islands | Accession | 01/08/1927 | |
| Uganda | Accession | 17/02/1927 | |
| UNITED KINGDOM | Signature | 11/11/1924 | |
| UNITED KINGDOM | Ratification | 01/01/1925 | |
| Western Pacific High Commsn Territories | Accession | 17/02/1927 | |
| Windward Islands | Accession | 17/02/1927 | |
| Zanzibar | Accession | 17/02/1927 |