| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ABYSSINIA | Signature | 21/06/1926 | |
| Aden Colony | Extension | 16/04/1945 | |
| AFGHANISTAN | Signature | 21/06/1926 | |
| AFGHANISTAN | Ratification | 13/02/1939 | |
| Alawites & Djehel Druse | Extension | 10/03/1928 | |
| ALBANIA | Signature | 21/06/1926 | |
| Algeria | Extension | 10/03/1928 | |
| ARGENTINE REPUBLIC | Signature | 21/06/1926 | |
| AUSTRALIA | Signature | 21/06/1926 | |
| AUSTRALIA | Ratification | 06/09/1928 | |
| AUSTRIA | Signature | 21/06/1926 | |
| Bahamas | Extension | 09/10/1928 | |
| Barbados | Extension | 20/11/1945 | |
| Basutoland | Extension | 09/10/1928 | |
| Bechuanaland | Extension | 09/10/1928 | |
| Belgian Congo | Extension | 01/01/1905 | |
| BELGIUM | Signature | 21/06/1926 | |
| BELGIUM | Ratification | 10/03/1928 | |
| Bermuda | Extension | 15/12/1928 | |
| BRAZIL | Signature | 21/06/1926 | |
| BRAZIL | Ratification | 03/12/1929 | |
| British Guiana | Extension | 20/12/1929 | |
| British Honduras | Extension | 09/10/1928 | |
| British Solomon Islands | Extension | 24/01/1929 | |
| BULGARIA | Signature | 21/06/1926 | |
| CANADA | Signature | 21/06/1926 | |
| CANADA | Ratification | 30/09/1928 | |
| Ceylon | Extension | 09/10/1928 | |
| CHILE | Signature | 21/06/1926 | |
| CHILE | Ratification | 08/01/1937 | |
| CHINA | Signature | 21/06/1926 | |
| COLOMBIA | Signature | 21/06/1926 | |
| CUBA | Signature | 21/06/1926 | |
| Cyprus | Extension | 09/10/1928 | |
| CZECHOSLOVAKIA | Signature | 21/06/1926 | |
| CZECHOSLOVAKIA | Ratification | 28/03/1928 | |
| DANZIG | Signature | 21/06/1926 | |
| DANZIG | Ratification | 30/06/1934 | |
| DENMARK | Signature | 21/06/1926 | |
| DENMARK | Ratification | 28/01/1931 | |
| DOMINICAN REPUBLIC | Signature | 21/06/1926 | |
| ECUADOR | Signature | 21/06/1926 | |
| EGYPT | Signature | 21/06/1926 | |
| EGYPT | Ratification | 20/11/1935 | |
| EGYPT | Reservation | 20/11/1935 | |
| Falkland Islands | Extension | 09/10/1928 | |
| Fiji | Extension | 09/10/1928 | |
| FINLAND | Signature | 21/06/1926 | |
| FINLAND | Ratification | 18/01/1936 | |
| FRANCE | Signature | 21/06/1926 | |
| FRANCE | Ratification | 10/03/1928 | |
| French Equatorial Africa | Extension | 10/03/1928 | |
| French Guiana | Extension | 01/01/1905 | |
| French Indo-china | Extension | 10/03/1928 | |
| French West Africa | Extension | 10/03/1928 | |
| GERMANY | Signature | 21/06/1926 | |
| GERMANY | Ratification | 06/08/1930 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/01/1953 | |
| Gibraltar | Extension | 09/10/1928 | |
| Gilbert & Ellice Colony | Extension | 24/01/1929 | |
| Gold Coast | Extension | 09/10/1928 | |
| GREECE | Signature | 21/06/1926 | |
| GREECE | Ratification | 29/07/1929 | |
| GUATEMALA | Signature | 21/06/1926 | |
| HAITI | Signature | 21/06/1926 | |
| HEJAZ | Signature | 21/06/1926 | |
| HONDURAS | Signature | 21/06/1926 | |
| Hong Kong | Extension | 13/02/1931 | |
| HUNGARY | Signature | 21/06/1926 | |
| HUNGARY | Ratification | 25/06/1930 | |
| INDIA | Accession | 13/08/1947 | |
| IRAQ | Accession | 12/01/1931 | |
| Irish Free State | Extension | 23/02/1929 | |
| ITALY | Signature | 21/06/1926 | |
| ITALY | Ratification | 11/01/1930 | |
| Jamaica | Extension | 05/06/1946 | |
| JAPAN | Signature | 21/06/1926 | |
| JAPAN | Ratification | 17/12/1935 | |
| Kenya | Extension | 24/01/1929 | |
| Lebanon | Extension | 10/03/1928 | |
| Leeward Islands | Extension | 20/11/1945 | |
| LIBERIA | Signature | 21/06/1926 | |
| LITHUANIA | Signature | 21/06/1926 | |
| LUXEMBOURG | Signature | 21/06/1926 | |
| LUXEMBOURG | Ratification | 06/02/1930 | |
| Malay States, Federated | Extension | 09/10/1928 | |
| Malay States, Unfederated | Extension | 09/10/1928 | |
| Mauritius | Extension | 16/04/1945 | |
| MEXICO | Signature | 21/06/1926 | |
| MEXICO | Ratification | 31/12/1929 | |
| MONACO | Signature | 21/06/1926 | |
| MONACO | Ratification | 10/03/1928 | |
| MOROCCO | Signature | 21/06/1926 | |
| MOROCCO | Ratification | 25/05/1928 | |
| NETHERLANDS THE | Signature | 21/06/1926 | |
| NETHERLANDS THE | Ratification | 14/11/1930 | |
| New Zealand | Extension | 10/03/1928 | |
| Newfoundland (UK) | Extension | 09/10/1928 | |
| Nigeria | Extension | 09/10/1928 | |
| North Borneo | Extension | 09/10/1928 | |
| Northern Rhodesia | Extension | 09/10/1928 | |
| NORWAY | Signature | 21/06/1926 | |
| Nyasaland | Extension | 09/10/1928 | |
| Palestine | Extension | 09/10/1928 | |
| Papua New Guinea | Extension | 12/10/1929 | |
| PARAGUAY | Signature | 21/06/1926 | |
| PERSIA | Signature | 21/06/1926 | |
| PERU | Signature | 21/06/1926 | |
| POLAND | Signature | 21/06/1926 | |
| POLAND | Ratification | 27/08/1932 | |
| PORTUGAL | Signature | 27/08/1932 | |
| PORTUGAL | Ratification | 03/04/1940 | |
| ROUMANIA | Signature | 21/06/1926 | |
| ROUMANIA | Ratification | 23/07/1928 | |
| Ruanda Urundi | Extension | 01/01/1905 | |
| SALVADOR | Signature | 21/06/1926 | |
| SALVADOR | Ratification | 22/02/1930 | |
| SAN MARINO | Signature | 21/06/1926 | |
| Sarawak | Extension | 09/10/1928 | |
| SERB-CROAT-SLOVENE STATE | Signature | 21/06/1926 | |
| SERB-CROAT-SLOVENE STATE | Ratification | 10/11/1929 | |
| Seychelles | Extension | 09/10/1928 | |
| Sierra Leone | Extension | 09/10/1928 | |
| South Africa | Extension | 10/03/1928 | |
| Southern Rhodesia | Extension | 09/10/1928 | |
| SOVIET UNION | Signature | 21/06/1926 | |
| SOVIET UNION | Ratification | 26/02/1929 | |
| SPAIN | Signature | 21/06/1926 | |
| SPAIN | Ratification | 10/03/1928 | |
| St Helena | Extension | 09/10/1928 | |
| Straits Settlements | Extension | 09/10/1928 | |
| SUDAN | Signature | 21/06/1926 | |
| SUDAN | Ratification | 10/03/1928 | |
| Swaziland | Extension | 09/10/1928 | |
| SWEDEN | Accession | 01/07/1934 | |
| SWITZERLAND | Signature | 21/06/1926 | |
| Syria | Extension | 10/03/1928 | |
| Tanganyika | Extension | 09/10/1928 | |
| The Gambia | Extension | 09/10/1928 | |
| Tonga | Extension | 09/10/1928 | |
| Transjordan | Termination | 01/01/1905 | |
| Transjordan | Extension | 09/10/1928 | |
| Trinidad | Extension | 11/06/1929 | |
| TUNIS | Signature | 21/06/1926 | |
| TUNIS | Ratification | 31/05/1928 | |
| TURKEY | Signature | 21/06/1926 | |
| Uganda | Extension | 24/01/1929 | |
| UNITED KINGDOM | Signature | 21/06/1926 | |
| UNITED KINGDOM | Ratification | 10/03/1928 | |
| UNITED KINGDOM | Declaration | 09/10/1928 | |
| UNITED KINGDOM | Declaration | 15/12/1928 | |
| UNITED KINGDOM | Declaration | 24/01/1929 | |
| UNITED KINGDOM | Declaration | 23/02/1929 | |
| UNITED KINGDOM | Declaration | 11/06/1929 | |
| UNITED KINGDOM | Declaration | 12/10/1929 | |
| UNITED KINGDOM | Declaration | 20/12/1929 | |
| UNITED KINGDOM | Declaration | 13/02/1931 | |
| UNITED KINGDOM | Declaration | 16/04/1945 | |
| UNITED KINGDOM | Declaration | 20/11/1945 | |
| UNITED KINGDOM | Declaration | 05/06/1946 | |
| UNITED KINGDOM | Declaration | 01/01/1953 | |
| UNITED STATES OF AMERICA | Signature | 21/06/1926 | |
| UNITED STATES OF AMERICA | Ratification | 22/05/1928 | |
| URUGUAY | Signature | 21/06/1926 | |
| VENEZUELA | Signature | 21/06/1926 | |
| VENEZUELA | Ratification | 04/02/1930 | |
| Weihaiwei | Extension | 09/10/1928 | |
| Windward Islands | Extension | 20/11/1945 | |
| Zanzibar | Extension | 09/10/1928 |