| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| Aruba | Extension | 01/01/1986 | |
| Australia | Extension | 20/08/1925 | |
| AUSTRIA-HUNGARY | Signature | 02/06/1911 | |
| AUSTRIA-HUNGARY | Ratification | 01/04/1913 | |
| BELGIUM | Signature | 02/06/1911 | |
| BELGIUM | Accession | 18/06/1914 | |
| BRAZIL | Signature | 02/06/1911 | |
| BRAZIL | Accession | 20/10/1914 | |
| BULGARIA | Accession | 13/06/1921 | |
| Canada | Extension | 01/09/1923 | |
| Ceylon | Extension | 25/05/1913 | |
| CUBA | Signature | 02/06/1911 | |
| CUBA | Accession | 03/12/1921 | 03/01/1922 |
| CZECHOSLOVAKIA | Accession | 20/06/1919 | |
| DANZIG | Accession | 26/11/1921 | |
| DENMARK | Signature | 02/06/1911 | |
| DENMARK | Accession | 30/07/1914 | |
| DOMINICAN REPUBLIC | Signature | 02/06/1911 | |
| DOMINICAN REPUBLIC | Ratification | 01/04/1913 | |
| ESTONIA | Accession | 12/02/1924 | |
| Faroe Islands | Extension | 30/07/1914 | |
| FINLAND | Accession | 20/09/1921 | |
| FRANCE | Signature | 02/06/1911 | |
| FRANCE | Ratification | 01/04/1913 | |
| GERMANY | Signature | 02/06/1911 | |
| GERMANY | Ratification | 01/04/1913 | |
| GREECE | Accession | 02/10/1924 | |
| Irish Free State | Extension | 04/12/1925 | |
| ITALY | Signature | 02/06/1911 | |
| ITALY | Ratification | 01/04/1913 | |
| JAPAN | Signature | 02/06/1911 | |
| JAPAN | Ratification | 01/04/1913 | |
| LATVIA | Accession | 20/08/1925 | 20/08/1925 |
| LEBANON | Accession | 01/09/1924 | 01/09/1924 |
| LUXEMBOURG | Accession | 30/06/1922 | |
| MEXICO | Signature | 02/06/1911 | |
| MEXICO | Ratification | 01/04/1913 | |
| MOROCCO | Accession | 30/06/1917 | |
| NETHERLANDS THE | Signature | 02/06/1911 | |
| NETHERLANDS THE | Ratification | 01/04/1913 | |
| New Zealand | Extension | 25/04/1913 | |
| NORWAY | Signature | 02/06/1911 | |
| NORWAY | Ratification | 01/04/1913 | |
| Papua New Guinea | Extension | 13/04/1926 | |
| POLAND | Accession | 20/11/1919 | |
| PORTUGAL | Signature | 02/06/1911 | |
| PORTUGAL | Ratification | 01/04/1913 | |
| ROUMANIA | Accession | 06/10/1920 | |
| SERB-CROAT-SLOVENE STATE | Accession | 26/02/1921 | |
| SERBIA | Signature | 02/06/1911 | |
| SPAIN | Signature | 02/06/1911 | |
| SPAIN | Ratification | 01/04/1913 | |
| SWEDEN | Signature | 02/06/1911 | |
| SWEDEN | Accession | 21/11/1916 | |
| SWITZERLAND | Signature | 02/06/1911 | |
| SWITZERLAND | Ratification | 01/04/1913 | |
| SYRIA | Accession | 01/09/1924 | 01/09/1924 |
| Trinidad And Tobago | Extension | 25/04/1913 | |
| TUNIS | Signature | 02/06/1911 | |
| TUNIS | Ratification | 01/04/1913 | |
| TURKEY | Accession | 10/10/1925 | |
| UNITED KINGDOM | Signature | 02/06/1911 | |
| UNITED KINGDOM | Ratification | 01/04/1913 | |
| UNITED STATES OF AMERICA | Signature | 02/06/1911 | |
| UNITED STATES OF AMERICA | Ratification | 01/04/1913 | |