| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINA | Withdrawal | | 24/05/1947 |
| ARGENTINA | Accession | 01/04/1935 | |
| Australia | Extension | 28/03/1923 | |
| Australia | Ratification | 19/12/1923 | |
| AUSTRIA | Accession | 03/06/1937 | |
| BELGIUM | Signature | 22/12/1922 | |
| BELGIUM | Ratification | 19/04/1923 | |
| BULGARIA | Accession | 09/05/1924 | |
| Canada | Extension | 06/04/1923 | |
| Canada | Ratification | 19/12/1923 | |
| CUBA | Withdrawal | | 10/06/1949 |
| Curacao | Extension | 22/08/1928 | |
| CZECHOSLOVAKIA | Accession | 17/02/1925 | |
| DENMARK | Withdrawal | | 05/03/1948 |
| DENMARK | Accession | 14/10/1927 | |
| ESTONIA | Accession | 01/01/1938 | |
| FINLAND | Withdrawal | | 01/07/1948 |
| FINLAND | Accession | | 01/01/1932 |
| FRANCE | Withdrawal | | 20/03/1948 |
| FRANCE | Signature | 21/11/1922 | |
| FRANCE | Ratification | 26/12/1924 | |
| GREECE | Signature | 01/12/1923 | |
| GREECE | Ratification | 07/03/1925 | |
| India | Extension | 28/03/1923 | |
| India | Ratification | 19/12/1923 | |
| Indies | Extension | 22/08/1928 | |
| ITALY | Withdrawal | | 29/09/1948 |
| ITALY | Accession | 21/01/1924 | |
| JAPAN | Signature | 10/03/1923 | |
| JAPAN | Ratification | 04/08/1925 | |
| LATVIA | Accession | 01/11/1937 | |
| NETHERLANDS THE | Withdrawal | | 18/04/1948 |
| NETHERLANDS THE | Accession | 22/08/1928 | |
| New Zealand | Extension | 28/03/1923 | |
| New Zealand | Ratification | 28/03/1923 | |
| NORWAY | Withdrawal | | 12/03/1948 |
| NORWAY | Accession | 01/07/1931 | |
| PARAGUAY | Withdrawal | | 04/11/1948 |
| PARAGUAY | Accession | 27/10/1939 | |
| PERSIA | Signature | 07/04/1924 | |
| PERSIA | Ratification | 08/07/1925 | |
| PERU | Withdrawal | | 20/05/1948 |
| PERU | Accession | 06/07/1937 | |
| POLAND | Withdrawal | | 01/07/1948 |
| PORTUGAL | Signature | 02/02/1923 | |
| PORTUGAL | Ratification | 30/07/1924 | |
| ROUMANIA | Withdrawal | | 31/03/1948 |
| ROUMANIA | Accession | 14/04/1927 | |
| SAAR TERRITORY | Accession | 28/04/1927 | |
| SERB-CROAT-SLOVENE STATE | Signature | 18/05/1923 | |
| SERB-CROAT-SLOVENE STATE | Ratification | 14/12/1926 | |
| SIAM | Withdrawal | | 04/04/1948 |
| SIAM | Signature | 21/08/1923 | |
| SIAM | Ratification | 20/02/1924 | |
| South Africa | Withdrawal | | 01/03/1948 |
| South Africa | Extension | 28/03/1923 | |
| South Africa | Ratification | 19/12/1923 | |
| SPAIN | Withdrawal | | 05/03/1948 |
| SPAIN | Accession | 01/01/1935 | |
| Surinam | Extension | 22/08/1928 | |
| SWEDEN | Accession | 21/07/1927 | |
| SWITZERLAND | Accession | 01/10/1934 | |
| UNITED KINGDOM | Signature | 28/03/1923 | |
| UNITED KINGDOM | Ratification | 19/12/1923 | |
| YUGOSLAVIA | Withdrawal | | 01/04/1948 |