| Country | Action | Action Date | Effective Date |
|---|
| AFGHANISTAN | Accession | 01/04/1928 | |
| ALBANIA | Signature | 28/08/1924 | |
| ALGERIA | Signature | 28/08/1924 | |
| ALGERIA | Ratification | 09/06/1926 | |
| Antigua | Extension | 03/10/1925 | |
| ARGENTINE REPUBLIC | Signature | 28/08/1924 | |
| Ascension Island | Extension | 03/10/1925 | |
| Australia | Extension | 26/08/1925 | |
| AUSTRIA | Signature | 28/08/1924 | |
| AUSTRIA | Ratification | 01/09/1925 | |
| Bahamas | Extension | 03/10/1925 | |
| Barbados | Extension | 03/10/1925 | |
| Basutoland | Extension | 01/10/1925 | |
| Bechuanaland | Extension | 03/10/1925 | |
| Belgian Congo | Extension | 01/09/1925 | |
| BELGIUM | Signature | 28/08/1924 | |
| BELGIUM | Ratification | 01/09/1925 | |
| Bermuda | Extension | 03/10/1925 | |
| BOLIVIA | Signature | 28/08/1924 | |
| BOLIVIA | Ratification | 30/10/1925 | |
| BRAZIL | Signature | 28/08/1924 | |
| BRAZIL | Ratification | 01/09/1925 | |
| BRITISH EMPIRE | Signature | 28/08/1924 | |
| BRITISH EMPIRE | Ratification | 01/09/1925 | |
| British Guiana | Extension | 03/10/1925 | |
| British Honduras | Extension | 03/10/1925 | |
| British Solomon Islands | Extension | 03/10/1925 | |
| British Virgin Islands | Extension | 03/10/1925 | |
| Brunei | Extension | 03/10/1925 | |
| BULGARIA | Signature | 28/08/1924 | |
| BULGARIA | Ratification | 01/09/1925 | |
| Cameroons | Extension | 01/01/1929 | |
| Canada | Signature | 28/08/1924 | |
| Canada | Ratification | 01/09/1925 | |
| Cayman Islands | Extension | 03/10/1925 | |
| Ceylon | Extension | 03/10/1925 | |
| CHILE | Signature | 28/08/1924 | |
| CHILE | Ratification | 01/03/1927 | |
| CHINA | Signature | 28/08/1924 | |
| CHINA | Ratification | 01/10/1925 | |
| COLOMBIA | Signature | 28/08/1924 | |
| COLOMBIA | Ratification | 02/01/1929 | |
| COSTA RICA | Signature | 28/08/1924 | |
| COSTA RICA | Ratification | 21/01/1928 | |
| CUBA | Signature | 28/08/1924 | |
| Cyprus | Extension | 03/10/1925 | |
| CZECHOSLOVAKIA | Signature | 28/08/1924 | |
| CZECHOSLOVAKIA | Ratification | 02/11/1925 | |
| DANZIG | Signature | 28/08/1924 | |
| DENMARK | Signature | 28/08/1924 | |
| DENMARK | Ratification | 01/09/1925 | |
| Dominica | Extension | 03/10/1925 | |
| DOMINICAN REPUBLIC | Signature | 28/08/1924 | |
| DOMINICAN REPUBLIC | Ratification | 11/02/1926 | |
| ECUADOR | Signature | 28/08/1924 | |
| ECUADOR | Ratification | 01/09/1925 | |
| EGYPT | Signature | 28/08/1924 | |
| EGYPT | Ratification | 30/11/1926 | |
| ESTONIA | Signature | 28/08/1924 | |
| ESTONIA | Ratification | 01/09/1925 | |
| ETHIOPIA | Signature | 28/08/1924 | |
| ETHIOPIA | Ratification | 23/11/1926 | |
| Falkland Islands | Extension | 03/10/1925 | |
| Fiji | Extension | 03/10/1925 | |
| FINLAND | Signature | 28/08/1924 | |
| FINLAND | Ratification | 01/09/1925 | |
| FRANCE | Signature | 28/08/1924 | |
| FRANCE | Ratification | 09/09/1925 | |
| French Indo-china | Extension | 09/06/1926 | |
| GERMANY | Signature | 28/08/1924 | |
| GERMANY | Ratification | 01/09/1925 | |
| Gibraltar | Extension | 03/10/1925 | |
| Gilbert And Ellice Islands | Extension | 03/10/1925 | |
| Gold Coast | Extension | 03/10/1925 | |
| GREECE | Signature | 28/08/1924 | |
| GREECE | Ratification | 11/01/1927 | |
| Grenada | Extension | 03/10/1925 | |
| GUATEMALA | Signature | 28/08/1924 | |
| GUATEMALA | Ratification | 01/09/1925 | |
| HAITI | Signature | 28/08/1924 | |
| HAITI | Ratification | 23/01/1926 | |
| HEJAZ | Signature | 28/08/1924 | |
| HEJAZ | Ratification | 01/01/1927 | |
| HONDURAS | Accession | 01/10/1925 | 10/05/1928 |
| Hong Kong | Extension | 03/10/1925 | |
| HUNGARY | Signature | 28/08/1924 | |
| HUNGARY | Ratification | 01/09/1925 | |
| ICELAND | Signature | 28/08/1924 | |
| ICELAND | Ratification | 01/09/1925 | |
| India | Signature | 28/08/1924 | |
| India | Ratification | 01/09/1925 | |
| Irak | Extension | 03/10/1925 | |
| IRAQ | Accession | 22/04/1929 | |
| Irish Free State | Signature | 28/08/1924 | |
| Irish Free State | Ratification | 10/09/1925 | |
| ITALY | Signature | 28/08/1924 | |
| ITALY | Ratification | 26/11/1926 | |
| Jamaica | Extension | 03/10/1925 | |
| JAPAN | Signature | 28/08/1924 | |
| JAPAN | Ratification | 22/01/1926 | |
| Johore | Extension | 01/07/1928 | |
| Kelantan | Extension | 03/10/1925 | |
| Kenya | Extension | 03/10/1925 | |
| LATVIA | Signature | 28/08/1924 | |
| LATVIA | Ratification | 14/06/1927 | |
| LIBERIA | Signature | 28/08/1924 | |
| LITHUANIA | Signature | 28/08/1924 | |
| LUXEMBOURG | Signature | 28/08/1924 | |
| LUXEMBOURG | Ratification | 07/09/1925 | |
| Malay States, Federated | Extension | 03/10/1925 | |
| Malay States, Unfederated | Extension | 03/10/1925 | |
| Malta | Extension | 03/10/1925 | |
| Mauritius | Extension | 03/10/1925 | |
| MEXICO | Signature | 28/08/1924 | |
| MEXICO | Ratification | 01/09/1925 | |
| Montserrat | Extension | 03/10/1925 | |
| MOROCCO | Signature | 28/08/1924 | |
| MOROCCO | Ratification | 01/09/1925 | |
| MOROCCO | Ratification | 16/06/1927 | |
| NETHERLANDS THE | Signature | 28/08/1924 | |
| NETHERLANDS THE | Ratification | 01/09/1925 | |
| New Hebrides | Extension | 03/10/1925 | |
| New Zealand | Signature | 28/08/1924 | |
| New Zealand | Ratification | 01/09/1925 | |
| Newfoundland (UK) | Extension | 01/10/1925 | |
| NICARAGUA | Signature | 28/08/1924 | |
| NICARAGUA | Ratification | 01/09/1925 | |
| Nigeria | Extension | 01/01/1929 | |
| North Borneo | Extension | 03/10/1925 | |
| NORWAY | Signature | 28/08/1924 | |
| NORWAY | Ratification | 01/09/1925 | |
| Nyasaland | Extension | 03/10/1925 | |
| Palestine | Extension | 03/10/1925 | |
| PANAMA | Signature | 28/08/1924 | |
| PANAMA | Ratification | 10/12/1928 | |
| PARAGUAY | Signature | 28/08/1924 | |
| PARAGUAY | Ratification | 08/12/1926 | |
| PERSIA | Signature | 28/08/1924 | |
| PERSIA | Ratification | 21/11/1929 | |
| PERU | Signature | 28/08/1924 | |
| PERU | Ratification | 23/01/1928 | |
| PHILIPPINES | Signature | 28/08/1924 | |
| POLAND | Signature | 28/08/1924 | |
| PORTUGAL | Signature | 28/08/1924 | |
| PORTUGAL | Ratification | 27/11/1925 | |
| ROUMANIA | Signature | 28/08/1924 | |
| ROUMANIA | Ratification | 22/04/1927 | |
| SAAR TERRITORY | Signature | 28/08/1924 | |
| SAAR TERRITORY | Ratification | 01/09/1925 | |
| SALVADOR | Signature | 28/08/1924 | |
| SALVADOR | Ratification | 01/09/1925 | |
| SAN MARINO | Signature | 28/08/1924 | |
| SAN MARINO | Ratification | 01/02/1927 | |
| Sarawak | Extension | 03/10/1925 | |
| SERB-CROAT-SLOVENE STATE | Signature | 28/08/1924 | |
| SERB-CROAT-SLOVENE STATE | Ratification | 24/11/1926 | |
| Seychelles | Extension | 03/10/1925 | |
| SIAM | Signature | 28/08/1924 | |
| SIAM | Ratification | 01/09/1925 | |
| Sierra Leone | Extension | 03/10/1925 | |
| Somaliland | Extension | 03/10/1925 | |
| South Africa | Signature | 28/08/1924 | |
| SOUTH AFRICA | Signature | 28/08/1924 | |
| SOUTH AFRICA | Ratification | 07/12/1925 | |
| South Africa | Ratification | 07/12/1925 | |
| Southern Rhodesia | Withdrawal | | 01/02/1930 |
| Southern Rhodesia | Extension | 19/10/1925 | |
| SOVIET UNION | Signature | 28/08/1924 | |
| SOVIET UNION | Ratification | 01/09/1925 | |
| SPAIN | Signature | 28/08/1924 | |
| SPAIN | Ratification | 21/09/1925 | |
| Spanish Colonies | Signature | 28/08/1924 | |
| Spanish Colonies | Ratification | 04/01/1926 | |
| St Helena | Extension | 03/10/1925 | |
| St Lucia | Extension | 03/10/1925 | |
| St Vincent | Extension | 03/10/1925 | |
| St. Christopher And Nevis | Extension | 03/10/1925 | |
| Straits Settlements | Extension | 03/10/1925 | |
| SWEDEN | Signature | 28/08/1924 | |
| SWEDEN | Ratification | 01/09/1925 | |
| SWITZERLAND | Signature | 28/08/1924 | |
| SWITZERLAND | Ratification | 01/09/1925 | |
| Tanganyika | Extension | 03/10/1925 | |
| The Gambia | Extension | 03/10/1925 | |
| Togoland | Extension | 03/10/1925 | |
| Transjordan | Extension | 11/07/1927 | |
| Trenganu | Extension | 01/07/1928 | |
| Trinidad And Tobago | Extension | 03/10/1925 | |
| TUNIS | Signature | 28/08/1924 | |
| TUNIS | Ratification | 01/09/1925 | |
| TURKEY | Signature | 28/08/1924 | |
| TURKEY | Ratification | 30/08/1928 | |
| Turks And Caicos Islands | Extension | 03/10/1925 | |
| Uganda | Extension | 03/10/1925 | |
| UNITED KINGDOM | Signature | 28/08/1924 | |
| UNITED KINGDOM | Ratification | 01/09/1925 | |
| UNITED STATES OF AMERICA | Signature | 28/08/1924 | |
| UNITED STATES OF AMERICA | Ratification | 01/09/1925 | |
| URUGUAY | Signature | 28/08/1924 | |
| VATICAN CITY | Accession | 25/05/1929 | 01/06/1929 |
| VENEZUELA | Signature | 28/08/1924 | |
| VENEZUELA | Ratification | 07/01/1927 | |
| Zanzibar | Extension | 03/10/1925 | |