| Country | Action | Action Date | Effective Date |
|---|
| ABYSSINIA | Accession | 20/09/1928 | |
| AUSTRIA | Signature | 09/12/1923 | |
| AUSTRIA | Ratification | 20/01/1927 | |
| BELGIUM | Signature | 09/12/1923 | |
| BELGIUM | Ratification | 16/05/1927 | |
| BRAZIL | Signature | 09/12/1923 | |
| BRITISH EMPIRE | Signature | 09/12/1923 | |
| BRITISH EMPIRE | Ratification | 29/08/1924 | |
| British Guiana | Extension | 22/09/1925 | |
| British Honduras | Extension | 22/09/1925 | |
| Brunei | Extension | 22/09/1925 | |
| BULGARIA | Signature | 09/12/1923 | |
| CHILE | Signature | 09/12/1923 | |
| CHINA | Accession | 21/01/1925 | |
| COLOMBIA | Accession | 03/12/1927 | |
| CZECHOSLOVAKIA | Signature | 09/12/1923 | |
| DANZIG | Signature | 09/12/1923 | |
| DANZIG | Ratification | 07/01/1928 | |
| DENMARK | Signature | 09/12/1923 | |
| DENMARK | Ratification | 27/04/1926 | |
| ESTONIA | Signature | 09/12/1923 | |
| ESTONIA | Ratification | 21/09/1929 | |
| FINLAND | Signature | 09/12/1923 | |
| FINLAND | Ratification | 11/02/1937 | |
| FRANCE | Signature | 24/10/1924 | |
| FRANCE | Reservation | 24/10/1924 | |
| FRANCE | Ratification | 28/08/1935 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 21/07/1958 | |
| GERMAN DEMOCRATIC REPUBLIC | Notification | 30/09/1974 | 26/09/1958 |
| GERMANY | Signature | 09/12/1923 | |
| GERMANY | Ratification | 05/12/1927 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/01/1953 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/05/1954 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/08/1956 | |
| Gold Coast | Extension | 22/09/1925 | |
| GREECE | Signature | 09/12/1923 | |
| GREECE | Ratification | 06/03/1929 | |
| Hong Kong | Extension | 22/09/1925 | |
| HUNGARY | Signature | 09/12/1923 | |
| HUNGARY | Ratification | 21/03/1929 | |
| INDIA | Signature | 01/09/1924 | |
| INDIA | Ratification | 01/04/1925 | |
| ITALY | Signature | 09/12/1923 | |
| ITALY | Ratification | 10/12/1934 | |
| JAPAN | Signature | 09/12/1923 | |
| JAPAN | Ratification | 30/09/1926 | |
| LATVIA | Signature | 13/09/1924 | |
| LATVIA | Ratification | 08/10/1934 | |
| LITHUANIA | Signature | 09/12/1923 | |
| MALAWI | Succession | 07/01/1969 | |
| Malay States, Federated | Extension | 22/09/1925 | |
| Malay States, Unfederated | Extension | 22/09/1925 | |
| NETHERLANDS THE | Signature | 09/12/1923 | |
| NETHERLANDS THE | Ratification | 22/02/1928 | |
| NEW ZEALAND | Signature | 15/09/1924 | |
| NEW ZEALAND | Ratification | 01/04/1925 | |
| Newfoundland (UK) | Extension | 23/04/1925 | |
| Nigeria | Extension | 22/09/1925 | |
| Northern Rhodesia | Extension | 22/09/1925 | |
| NORWAY | Signature | 16/10/1924 | |
| NORWAY | Ratification | 24/02/1926 | |
| Nyasaland | Extension | 22/09/1925 | |
| Palestine | Extension | 22/09/1925 | |
| PANAMA | Signature | 04/04/1925 | |
| POLAND | Signature | 09/12/1923 | |
| POLAND | Ratification | 07/01/1928 | |
| PORTUGAL | Signature | 31/10/1924 | |
| ROUMANIA | Signature | 09/12/1923 | |
| ROUMANIA | Ratification | 23/12/1925 | |
| SALVADOR | Signature | 09/12/1923 | |
| SERB-CROAT-SLOVENE STATE | Signature | 09/12/1923 | |
| SIAM | Signature | 02/09/1924 | |
| SIAM | Ratification | 09/01/1925 | |
| Sierra Leone | Extension | 22/09/1925 | |
| Southern Rhodesia | Extension | 23/04/1925 | |
| SPAIN | Signature | 09/12/1923 | |
| SPAIN | Ratification | 15/01/1930 | |
| Straits Settlements | Extension | 22/09/1925 | |
| SWEDEN | Signature | 28/10/1924 | |
| SWEDEN | Ratification | 15/09/1927 | |
| SWITZERLAND | Signature | 30/10/1924 | |
| SWITZERLAND | Ratification | 23/10/1926 | |
| Tanganyika | Extension | 22/09/1925 | |
| The Gambia | Extension | 22/09/1925 | |
| Transjordan | Withdrawn | 01/01/1905 | |
| Transjordan | Extension | 22/09/1925 | |
| UNITED KINGDOM | Signature | 09/12/1923 | |
| UNITED KINGDOM | Ratification | 29/08/1924 | |
| URUGUAY | Signature | 09/12/1923 | |
| Western Samoa | Extension | 15/09/1924 | |
| YUGOSLAVIA | Signature | 09/12/1923 | |
| YUGOSLAVIA | Ratification | 07/05/1930 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |