| Country | Action | Action Date | Effective Date |
|---|
| Australia | Accession | 30/11/1914 | |
| Australia | Withdrawal | 28/06/1934 | |
| AUSTRIA | Accession | 03/01/1922 | |
| Belgian Congo | Accession | 02/12/1922 | |
| BELGIUM | Signature | 31/12/1913 | |
| BELGIUM | Ratification | 05/06/1914 | |
| BOLIVIA | Signature | 31/12/1913 | |
| CHILE | Signature | 31/12/1913 | |
| COLOMBIA | Signature | 31/12/1913 | |
| CUBA | Signature | 31/12/1913 | |
| CZECHOSLOVAKIA | Accession | 01/01/1925 | |
| DENMARK | Signature | 31/12/1913 | |
| DENMARK | Ratification | 10/07/1914 | |
| DENMARK | Withdrawal | 23/06/1934 | |
| DOMINICAN REPUBLIC | Signature | 31/12/1913 | |
| East Indies | Signature | 31/12/1913 | |
| East Indies | Ratification | 10/07/1914 | |
| FRANCE | Signature | 31/12/1913 | |
| FRANCE | Ratification | 17/04/1920 | |
| FRANCE | Withdrawal | 28/06/1934 | |
| GERMANY | Signature | 31/12/1913 | |
| GERMANY | Ratification | 05/06/1914 | |
| GERMANY | Withdrawal | 28/06/1934 | |
| GREECE | Accession | 01/01/1928 | |
| GUATEMALA | Signature | 31/12/1913 | |
| GUATEMALA | Ratification | 15/05/1914 | |
| HAYTI | Signature | 31/12/1913 | |
| HONDURAS | Signature | 31/12/1913 | |
| HUNGARY | Accession | 01/01/1924 | |
| ICELAND | Withdrawal | 23/06/1934 | |
| ITALY | Signature | 31/12/1913 | |
| ITALY | Ratification | 23/06/1914 | |
| ITALY | Withdrawal | 28/06/1934 | |
| JAPAN | Signature | 31/12/1913 | |
| JAPAN | Ratification | 23/06/1914 | |
| LATVIA | Withdrawal | 29/12/1928 | |
| LITHUANIA | Accession | 01/01/1928 | |
| MEXICO | Signature | 31/12/1913 | |
| NETHERLANDS THE | Accession | 01/01/1926 | |
| NICARAGUA | Signature | 31/12/1913 | |
| NORWAY | Signature | 31/12/1913 | |
| NORWAY | Ratification | 10/07/1914 | |
| PARAGUAY | Signature | 31/12/1913 | |
| PERSIA | Signature | 31/12/1913 | |
| PERU | Signature | 31/12/1913 | |
| PORTUGAL | Signature | 31/12/1913 | |
| PORTUGAL | Ratification | 04/05/1920 | |
| RUSSIA | Signature | 31/12/1913 | |
| RUSSIA | Ratification | 10/07/1914 | |
| SIAM | Signature | 31/12/1913 | |
| SIAM | Ratification | 10/07/1914 | |
| South Africa | Accession | 01/01/1905 | |
| SPAIN | Signature | 31/12/1913 | |
| SPAIN | Ratification | 10/07/1914 | |
| SWEDEN | Signature | 31/12/1913 | |
| SWEDEN | Ratification | 10/07/1914 | |
| SWEDEN | Withdrawal | 18/06/1934 | |
| SWITZERLAND | Signature | 31/12/1913 | |
| SWITZERLAND | Ratification | 10/07/1914 | |
| UNITED KINGDOM | Signature | 31/12/1913 | |
| UNITED KINGDOM | Ratification | 15/06/1915 | |
| UNITED KINGDOM | Withdrawal | 28/06/1934 | |
| UNITED KINGDOM | Denunciation | 01/07/1935 | |
| URUGUAY | Signature | 31/12/1913 | |
| URUGUAY | Ratification | 10/07/1914 | |