| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINE REPUBLIC | Accession | 25/11/1879 | |
| AUSTRIA | Accession | 21/07/1866 | |
| BADEN | Signature | 22/08/1864 | |
| BADEN | Ratification | 22/06/1865 | |
| BAVARIA | Accession | 30/06/1866 | |
| BELGIUM | Signature | 22/08/1864 | |
| BELGIUM | Ratification | 22/06/1865 | |
| BOLIVIA | Accession | 16/10/1879 | |
| BRAZIL | Accession | 26/01/1907 | |
| BULGARIA | Accession | 01/03/1884 | |
| CHILE | Accession | 15/11/1879 | |
| CHINA | Accession | 29/06/1904 | |
| COLOMBIA | Accession | 07/06/1906 | |
| CONGO | Accession | 27/12/1888 | |
| CUBA | Accession | 06/07/1907 | |
| DENMARK | Signature | 22/08/1864 | |
| DENMARK | Ratification | 22/06/1865 | |
| DOMINICAN REPUBLIC | Accession | 06/07/1907 | |
| ECUADOR | Accession | 03/08/1907 | |
| FRANCE | Signature | 22/08/1864 | |
| FRANCE | Ratification | 22/06/1865 | |
| GREECE | Accession | 17/01/1865 | |
| GUATEMALA | Accession | 24/03/1903 | |
| HAITI | Accession | 06/07/1907 | |
| HESSE | Signature | 22/08/1864 | |
| HESSE | Ratification | 22/06/1865 | |
| HESSE DARMSTADT | Accession | 22/06/1866 | |
| HOLY SEE | Accession | 09/05/1868 | |
| HONDURAS | Accession | 16/05/1898 | |
| ITALY | Signature | 22/08/1864 | |
| ITALY | Ratification | 22/06/1865 | |
| JAPAN | Accession | 05/06/1886 | |
| KOREA | Accession | 08/01/1903 | |
| LUXEMBOURG | Accession | 05/10/1888 | |
| MECKLENBERG-SCHWERIN | Accession | 09/03/1865 | |
| MEXICO | Accession | 13/03/1905 | |
| MONTENEGRO | Accession | 29/11/1875 | |
| NETHERLANDS THE | Signature | 22/08/1864 | |
| NETHERLANDS THE | Ratification | 22/06/1865 | |
| NICARAGUA | Accession | 16/05/1898 | |
| ORANGE FREE STATE | Accession | 28/09/1897 | |
| PANAMA | Accession | 29/07/1907 | |
| PARAGUAY | Accession | 06/07/1907 | |
| PERSIA | Accession | 05/12/1874 | |
| PERU | Accession | 22/04/1880 | |
| PORTUGAL | Signature | 22/08/1864 | |
| PORTUGAL | Ratification | 22/06/1865 | |
| PORTUGAL | Accession | 09/08/1866 | |
| PRUSSIA | Signature | 22/08/1864 | |
| PRUSSIA | Ratification | 22/06/1865 | |
| ROUMANIA | Accession | 30/11/1874 | |
| RUSSIA | Accession | 22/05/1867 | |
| SALVADOR | Accession | 30/12/1874 | |
| SALVADOR | Accession | 16/05/1898 | |
| SAXONY | Accession | 25/10/1866 | |
| SERBIA | Accession | 24/03/1876 | |
| SIAM | Accession | 29/06/1895 | |
| SOUTH AFRICA | Accession | 30/09/1896 | |
| SPAIN | Signature | 22/08/1864 | |
| SPAIN | Ratification | 22/06/1865 | |
| SWEDEN AND NORWAY | Accession | 13/12/1864 | |
| SWITZERLAND | Signature | 22/08/1864 | |
| SWITZERLAND | Ratification | 22/06/1865 | |
| TURKEY | Accession | 05/07/1865 | |
| UNITED KINGDOM | Ratification | 18/02/1865 | |
| UNITED KINGDOM | Accession | 18/02/1865 | |
| UNITED STATES OF AMERICA | Accession | 01/03/1882 | |
| URUGUAY | Accession | 03/05/1900 | |
| VENEZUELA | Accession | 09/07/1894 | |
| WURTEMBURG | Signature | 22/08/1864 | |
| WURTEMBURG | Ratification | 22/06/1865 | |