| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINE REPUBLIC | Accession | 01/04/1935 | |
| ARGENTINE REPUBLIC | Withdrawal | 24/05/1947 | |
| Australia | Extension | 13/10/1919 | |
| Australia | Ratification | 01/06/1922 | |
| AUSTRIA | Accession | 03/06/1937 | |
| BELGIUM | Withdrawal | | 30/07/1947 |
| BELGIUM | Signature | 13/10/1919 | |
| BELGIUM | Ratification | 01/06/1922 | |
| BOLIVIA | Denunciation | | 30/08/1924 |
| BOLIVIA | Signature | 13/10/1919 | |
| BOLIVIA | Ratification | 01/06/1922 | |
| BRAZIL | Signature | 13/10/1919 | |
| BULGARIA | Accession | 05/07/1923 | |
| Canada | Extension | 13/10/1919 | |
| Canada | Ratification | 01/01/1922 | |
| CHILE | Accession | 01/01/1926 | |
| CHILE | Denunciation | 14/10/1936 | 14/10/1937 |
| CHINA | Signature | 13/10/1919 | |
| CUBA | Signature | 13/10/1919 | |
| CUBA | Withdrawal | 10/06/1949 | |
| Curacao | Extension | 22/08/1928 | |
| Curacao | Withdrawal | 18/04/1948 | |
| CZECHOSLOVAKIA | Withdrawal | | 31/10/1946 |
| CZECHOSLOVAKIA | Signature | 13/10/1919 | |
| CZECHOSLOVAKIA | Ratification | 23/11/1923 | |
| DENMARK | Withdrawal | | 05/03/1948 |
| DENMARK | Accession | 14/10/1927 | |
| ECUADOR | Signature | 13/10/1919 | |
| ESTONIA | Accession | 01/01/1938 | |
| FINLAND | Accession | | 01/01/1932 |
| FINLAND | Withdrawal | | 01/07/1948 |
| FRANCE | Withdrawal | | 20/03/1948 |
| FRANCE | Signature | 13/10/1919 | |
| FRANCE | Ratification | 01/06/1922 | |
| GREECE | Withdrawal | | 18/04/1947 |
| GREECE | Signature | 13/10/1919 | |
| GREECE | Ratification | 01/06/1922 | |
| GUATEMALA | Signature | 13/10/1919 | |
| India | Withdrawal | | 17/05/1947 |
| India | Extension | 13/10/1919 | |
| India | Ratification | 01/06/1922 | |
| Indies | Withdrawal | | 18/04/1948 |
| Indies | Extension | 22/08/1928 | |
| IRAQ | Withdrawal | | 04/01/1948 |
| IRAQ | Accession | 01/10/1931 | |
| IRELAND, REPUBLIC OF | Withdrawal | | 25/07/1947 |
| ITALY | Withdrawal | | 29/09/1947 |
| ITALY | Signature | 13/10/1919 | |
| ITALY | Ratification | 13/03/1923 | |
| JAPAN | Withdrawal | | 08/10/1953 |
| JAPAN | Signature | 13/10/1919 | |
| JAPAN | Ratification | 01/06/1922 | |
| LATVIA | Accession | 01/11/1937 | |
| LIBERIA | Statement | 01/01/1905 | |
| LIBERIA | Accession | 29/03/1922 | |
| NETHERLANDS THE | Withdrawal | | 18/04/1948 |
| NETHERLANDS THE | Accession | 22/08/1928 | |
| New Zealand | Withdrawal | | 28/06/1947 |
| New Zealand | Extension | 13/10/1919 | |
| New Zealand | Ratification | 01/06/1922 | |
| NICARAGUA | Statement | 01/01/1905 | |
| NICARAGUA | Accession | 31/12/1920 | |
| NORWAY | Withdrawal | | 12/03/1948 |
| NORWAY | Accession | 01/07/1931 | |
| PANAMA | Signature | 13/10/1919 | |
| PANAMA | Ratification | 19/10/1929 | |
| PANAMA | Withdrawal | 11/11/1930 | 11/11/1931 |
| PARAGUAY | Withdrawal | | 04/11/1948 |
| PARAGUAY | Accession | 27/10/1939 | |
| PERSIA | Accession | 09/04/1920 | |
| PERSIA | Reservation | 11/07/1922 | |
| PERSIA | Withdrawal | 20/04/1933 | 20/04/1934 |
| PERU | Accession | 22/06/1920 | |
| PERU | Ratification | 08/01/1937 | |
| POLAND | Withdrawal | | 01/07/1948 |
| POLAND | Signature | 13/10/1919 | |
| POLAND | Ratification | 26/11/1924 | |
| PORTUGAL | Withdrawal | | 13/07/1947 |
| PORTUGAL | Signature | 13/10/1919 | |
| PORTUGAL | Ratification | 01/06/1922 | |
| ROUMANIA | Withdrawal | | 31/03/1948 |
| ROUMANIA | Signature | 13/10/1919 | |
| ROUMANIA | Ratification | 31/05/1924 | |
| SAAR TERRITORY | Accession | 28/04/1927 | |
| SERB-CROAT-SLOVENE STATE | Signature | 13/10/1919 | |
| SERB-CROAT-SLOVENE STATE | Ratification | 01/06/1922 | |
| SIAM | Signature | 13/10/1919 | |
| SIAM | Ratification | 01/06/1922 | |
| SIAM | Withdrawal | 04/04/1948 | |
| South Africa | Withdrawal | | 04/04/1947 |
| South Africa | Extension | 13/10/1919 | |
| South Africa | Ratification | 01/06/1922 | |
| SPAIN | Withdrawal | | 05/03/1948 |
| SPAIN | Accession | 01/01/1935 | |
| Surinam | Withdrawal | | 18/04/1948 |
| Surinam | Extension | 22/08/1928 | |
| SWEDEN | Withdrawal | | 13/07/1947 |
| SWEDEN | Accession | 21/07/1927 | |
| SWITZERLAND | Withdrawal | | 12/12/1947 |
| SWITZERLAND | Accession | 01/10/1934 | |
| UNITED KINGDOM | Withdrawal | | 17/05/1947 |
| UNITED KINGDOM | Signature | 13/10/1919 | |
| UNITED KINGDOM | Ratification | 01/06/1922 | |
| UNITED STATES OF AMERICA | Signature | 13/10/1919 | |
| URUGUAY | Signature | 13/10/1919 | |
| URUGUAY | Ratification | 13/07/1924 | |
| YUGOSLAVIA | Withdrawal | 01/04/1948 | |