| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Signature | 24/09/1931 | |
| AUSTRALIA | Signature | 24/09/1931 | |
| AUSTRIA | Accession | 02/01/1936 | |
| Bahamas | Extension | 17/02/1937 | |
| Barbados | Extension | 17/02/1937 | |
| BELGIUM | Signature | 24/09/1931 | |
| Bermuda | Extension | 17/02/1937 | |
| BRAZIL | Accession | 21/11/1932 | |
| British Guiana | Extension | 17/02/1937 | |
| British Honduras | Extension | 17/02/1937 | |
| British Solomon Islands | Extension | 17/02/1937 | |
| CANADA | Signature | 24/09/1931 | |
| CANADA | Ratification | 12/12/1935 | |
| Ceylon | Extension | 17/02/1937 | |
| COLOMBIA | Signature | 24/09/1931 | |
| Curacao | Extension | 30/05/1933 | |
| Cyprus | Extension | 17/02/1937 | |
| CZECHOSLOVAKIA | Signature | 24/09/1931 | |
| CZECHOSLOVAKIA | Ratification | 20/10/1933 | |
| DENMARK | Signature | 24/09/1931 | |
| DENMARK | Reservation | 24/09/1931 | |
| DENMARK | Ratification | 26/06/1934 | |
| East Indies | Extension | 30/05/1933 | |
| ECUADOR | Accession | 13/04/1935 | |
| EGYPT | Accession | 25/01/1933 | |
| Falkland Island Dependencies | Extension | 17/02/1937 | |
| Falkland Islands | Extension | 17/02/1937 | |
| Fiji | Extension | 17/02/1937 | |
| FINLAND | Signature | 24/09/1931 | |
| FINLAND | Ratification | 21/03/1936 | |
| FRANCE | Signature | 24/09/1931 | |
| FRANCE | Ratification | 16/05/1935 | |
| GERMANY | Signature | 24/09/1931 | |
| Gibraltar | Extension | 17/02/1937 | |
| Gilbert And Ellice Islands | Extension | 17/02/1937 | |
| Gold Coast | Extension | 17/02/1937 | |
| GREECE | Signature | 24/09/1931 | |
| Hong Kong | Extension | 17/02/1937 | |
| INDIA | Signature | 24/09/1931 | |
| Irish Free State | Extension | 09/04/1938 | |
| ITALY | Signature | 24/09/1931 | |
| ITALY | Ratification | 12/06/1933 | |
| ITALY | Reservation | 12/06/1933 | |
| Jamaica | Extension | 17/02/1937 | |
| Kenya | Extension | 17/02/1937 | |
| LATVIA | Accession | 17/09/1935 | |
| Leeward Islands | Extension | 17/02/1937 | |
| Malay States, Federated | Extension | 17/02/1937 | |
| Malay States, Unfederated | Extension | 17/02/1937 | |
| Malta | Extension | 17/02/1937 | |
| Mauritius | Extension | 17/02/1937 | |
| MEXICO | Signature | 24/09/1931 | |
| MEXICO | Ratification | 13/03/1933 | |
| MONACO | Accession | 07/06/1932 | |
| NETHERLANDS THE | Signature | 24/09/1931 | |
| NETHERLANDS THE | Ratification | 30/05/1933 | |
| NETHERLANDS THE | Declaration | 30/05/1933 | |
| NEW ZEALAND | Signature | 24/09/1931 | |
| NEW ZEALAND | Ratification | 16/10/1935 | |
| Newfoundland (UK) | Extension | 17/02/1937 | |
| NICARAGUA | Accession | 30/04/1932 | |
| Nigeria | Extension | 17/02/1937 | |
| North Borneo | Extension | 17/02/1937 | |
| NORWAY | Signature | 24/09/1931 | |
| NORWAY | Ratification | 18/07/1932 | |
| Palestine | Extension | 17/02/1937 | |
| POLAND | Signature | 24/09/1931 | |
| POLAND | Ratification | 27/09/1933 | |
| ROUMANIA | Signature | 24/09/1931 | |
| Sarawak | Extension | 17/02/1937 | |
| Seychelles | Extension | 17/02/1937 | |
| Sierra Leone | Extension | 17/02/1937 | |
| Somaliland Protectorate | Extension | 17/02/1937 | |
| SOUTH AFRICA | Signature | 24/09/1931 | |
| SOUTH AFRICA | Ratification | 11/01/1933 | |
| SPAIN | Signature | 24/09/1931 | |
| SPAIN | Ratification | 02/08/1933 | |
| St Helena And Ascension | Extension | 17/02/1937 | |
| Straits Settlements | Extension | 17/02/1937 | |
| SUDAN | Accession | 13/04/1932 | |
| Surinam | Extension | 30/05/1933 | |
| SWITZERLAND | Signature | 24/09/1931 | |
| SWITZERLAND | Ratification | 16/02/1933 | |
| Tanganyika | Extension | 17/02/1937 | |
| The Gambia | Extension | 17/02/1937 | |
| Tonga | Extension | 17/02/1937 | |
| Trinidad And Tobago | Extension | 17/02/1937 | |
| TURKEY | Signature | 24/09/1931 | |
| TURKEY | Ratification | 28/05/1934 | |
| UNITED KINGDOM | Signature | 24/09/1931 | |
| UNITED KINGDOM | Ratification | 18/10/1934 | |
| UNITED KINGDOM | Declaration | 18/10/1934 | |
| UNITED STATES OF AMERICA | Signature | 24/09/1931 | |
| UNITED STATES OF AMERICA | Ratification | 07/07/1932 | |
| Windward Islands | Extension | 17/02/1937 | |
| YUGOSLAVIA | Signature | 24/09/1931 | |
| YUGOSLAVIA | Ratification | 16/01/1934 | |
| Zanzibar | Extension | 17/02/1937 | |