| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Bahamas | Accession | 11/10/1933 | |
| Barbados | Accession | 11/10/1933 | |
| Bermuda | Accession | 11/10/1933 | |
| British Guiana | Accession | 11/10/1933 | |
| British Honduras | Accession | 11/10/1933 | |
| Canada | Accession | 01/07/1936 | |
| Ceylon | Accession | 11/10/1933 | |
| Channel Islands | Accession | 09/05/1935 | |
| Cyprus | Accession | 11/10/1933 | |
| ESTONIA | |||
| Falkland Islands | Accession | 11/10/1933 | |
| Fiji | Accession | 11/10/1933 | |
| Gibraltar | Accession | 11/10/1933 | |
| Gold Coast | Accession | 11/10/1933 | |
| Hong Kong | Accession | 11/10/1933 | |
| Isle of Man | Accession | 09/05/1935 | |
| Jamaica | Accession | 11/10/1933 | |
| Kenya | Accession | 11/10/1933 | |
| Leeward Islands | Accession | 11/10/1933 | |
| Malay States, Federated | Accession | 11/10/1933 | |
| Malay States, Unfederated | Accession | 11/10/1933 | |
| Malta | Accession | 11/10/1933 | |
| Mauritius | Accession | 11/10/1933 | |
| Netherlands West Indies | Accession | 30/07/1939 | |
| New Zealand | Accession | 22/12/1931 | |
| Newfoundland (UK) | Accession | 22/10/1934 | |
| Nigeria | Accession | 11/10/1933 | |
| Northern Ireland | Accession | 18/11/1932 | |
| Northern Rhodesia | Accession | 11/10/1931 | |
| Nyasaland | Accession | 11/10/1933 | |
| Palestine | Accession | 11/10/1933 | |
| Sarawak | Accession | 11/10/1933 | |
| Seychelles | Accession | 11/10/1933 | |
| Sierra Leone | Accession | 11/10/1933 | |
| Somaliland | Accession | 11/10/1933 | |
| South Africa | Accession | 11/10/1933 | |
| Southern Rhodesia | Accession | 25/05/1933 | |
| St Helena And Ascension | Accession | 25/10/1933 | |
| Straits Settlements | Accession | 11/10/1933 | |
| Tanganyika | Accession | 11/10/1933 | |
| The Gambia | Accession | 11/10/1933 | |
| Trinidad And Tobago | Accession | 11/10/1933 | |
| Uganda | Accession | 11/10/1933 | |
| UNITED KINGDOM | Signature | 22/12/1931 | |
| UNITED KINGDOM | Ratification | 12/03/1932 | |
| Western Pacific High Commsn Territories | Accession | 11/10/1933 | |
| Windward Islands | Accession | 11/10/1933 |