| Country | Action | Action Date | Effective Date |
|---|
| Aegean Islands | Extension | 19/01/1932 | |
| AUSTRALIA | Signature | 06/11/1925 | |
| AUSTRALIA | Accession | 12/02/1933 | |
| AUSTRALIA | Declaration | 12/02/1933 | |
| AUSTRALIA | Declaration | 29/07/1936 | |
| AUSTRIA | Declaration | 01/01/1905 | |
| AUSTRIA | Signature | 06/11/1925 | |
| AUSTRIA | Ratification | 01/05/1928 | |
| BELGIUM | Signature | 06/11/1925 | |
| BELGIUM | Accession | 12/06/1929 | 27/07/1929 |
| BRAZIL | Signature | 06/11/1925 | |
| BRAZIL | Accession | 26/10/1929 | |
| CANADA | Signature | 06/11/1925 | |
| CANADA | Ratification | 01/05/1928 | |
| CUBA | Signature | 06/11/1925 | |
| CZECHOSLOVAKIA | Signature | 06/11/1925 | |
| CZECHOSLOVAKIA | Accession | 03/03/1933 | |
| DANZIG | Signature | 06/11/1925 | |
| DENMARK | Signature | 06/11/1925 | |
| DENMARK | Accession | 10/09/1937 | |
| DOMINICAN REPUBLIC | Signature | 06/11/1925 | |
| DOMINICAN REPUBLIC | Accession | 23/06/1950 | 06/04/1951 |
| EGYPT | Accession | 01/07/1952 | |
| Eritrea | Extension | 19/01/1932 | |
| ESTONIA | Signature | 06/11/1925 | |
| FINLAND | Signature | 06/11/1925 | |
| FRANCE | Signature | 06/11/1925 | |
| FRANCE | Accession | 20/10/1930 | |
| FRANCE | Termination | 20/09/2010 | 20/09/2010 |
| GERMANY | Signature | 06/11/1925 | |
| GERMANY | Ratification | 01/05/1928 | |
| HUNGARY | Signature | 06/11/1925 | |
| HUNGARY | Accession | 16/05/1929 | |
| IRELAND, REPUBLIC OF | Signature | 06/11/1925 | |
| ITALY | Signature | 06/11/1925 | |
| ITALY | Ratification | 01/05/1928 | |
| ITALY | Declaration | 19/01/1932 | |
| JAPAN | Signature | 06/11/1925 | |
| JAPAN | Ratification | 01/01/1935 | |
| Libya | Extension | 19/01/1932 | |
| LIECHTENSTEIN | Accession | 14/07/1933 | |
| MEXICO | Signature | 06/11/1925 | |
| MEXICO | Accession | 16/01/1930 | |
| MOROCCO | Signature | 06/11/1925 | |
| MOROCCO | Accession | 27/07/1928 | |
| Nauru | Extension | 29/07/1936 | |
| NETHERLANDS THE | Signature | 06/11/1925 | |
| NETHERLANDS THE | Ratification | 01/05/1928 | |
| New Guinea | Extension | 12/02/1933 | |
| NEW ZEALAND | Accession | 29/07/1931 | |
| NEW ZEALAND | Declaration | 29/07/1931 | |
| Norfolk Island | Extension | 29/07/1936 | |
| NORWAY | Signature | 06/11/1925 | |
| NORWAY | Accession | 01/08/1938 | |
| Palestine | Accession | 12/09/1933 | |
| Papua | Extension | 12/02/1933 | |
| POLAND | Signature | 06/11/1925 | |
| POLAND | Accession | 22/11/1931 | |
| PORTUGAL | Signature | 06/11/1925 | |
| PORTUGAL | Accession | 17/11/1928 | |
| ROUMANIA | Accession | 19/11/1963 | |
| SERB-CROAT-SLOVENE STATE | Signature | 06/11/1925 | |
| SERB-CROAT-SLOVENE STATE | Accession | 29/10/1928 | |
| SPAIN | Signature | 06/11/1925 | |
| SPAIN | Ratification | 01/05/1928 | |
| SPAIN | Declaration | 15/12/1947 | |
| SPAIN | Declaration | 02/02/1956 | |
| SPAIN | Termination | 18/09/2012 | |
| SWEDEN | Signature | 06/11/1925 | |
| SWEDEN | Accession | 01/07/1934 | |
| SWITZERLAND | Signature | 06/11/1925 | |
| SWITZERLAND | Accession | 15/06/1929 | |
| SYRIA & GRAND LEBANON | Signature | 06/11/1925 | |
| SYRIA & GRAND LEBANON | Accession | 17/11/1930 | |
| Tanganyika | Extension | 01/01/1938 | |
| TANGIER | Accession | 06/03/1936 | |
| Trinidad And Tobago | Extension | 21/10/1929 | |
| TUNIS | Signature | 06/11/1925 | |
| TUNIS | Accession | 20/10/1930 | |
| UNITED KINGDOM | Signature | 06/11/1925 | |
| UNITED KINGDOM | Ratification | 01/05/1928 | |
| UNITED KINGDOM | Declaration | 21/10/1929 | |
| UNITED KINGDOM | Declaration | 01/01/1938 | |
| UNITED STATES OF AMERICA | Signature | 06/11/1925 | |
| UNITED STATES OF AMERICA | Accession | 06/03/1931 | |
| Western Samoa | Extension | 29/07/1931 | |