| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINE REPUBLIC | Signature | 15/06/1897 | |
| AUSTRIA-HUNGARY | Signature | 15/06/1897 | |
| BELGIUM | Signature | 15/06/1897 | |
| BOLIVIA | Signature | 15/06/1897 | |
| BRAZIL | Signature | 15/06/1897 | |
| British Honduras | Accession | 01/11/1903 | |
| BULGARIA | Signature | 15/06/1897 | |
| CANADA | Accession | 13/02/1899 | |
| CHILE | Signature | 15/06/1897 | |
| CHINA | Signature | 15/06/1897 | |
| COLOMBIA | Signature | 15/06/1897 | |
| CONGO | Signature | 15/06/1897 | |
| COSTA RICA | Signature | 15/06/1897 | |
| Cyprus | Accession | 01/11/1903 | |
| DENMARK | Signature | 15/06/1897 | |
| DOMINICAN REPUBLIC | Signature | 15/06/1897 | |
| ECUADOR | Signature | 15/06/1897 | |
| ECUADOR | Accession | 06/08/1906 | |
| EGYPT | Signature | 15/06/1897 | |
| FRANCE | Signature | 15/06/1897 | |
| GERMANY | Signature | 15/06/1897 | |
| GREECE | Signature | 15/06/1897 | |
| GUATEMALA | Signature | 15/06/1897 | |
| Hawaii | Extension | 15/06/1897 | |
| HAYTI | Signature | 15/06/1897 | |
| HONDURAS | Accession | 14/07/1899 | |
| India | Accession | 29/12/1898 | |
| Indies | Accession | 01/03/1905 | |
| ITALY | Signature | 15/06/1897 | |
| JAPAN | Signature | 15/06/1897 | |
| JAPAN | Accession | 28/07/1902 | |
| KOREA | Signature | 15/06/1897 | |
| LIBERIA | Signature | 15/06/1897 | |
| LUXEMBOURG | Signature | 15/06/1897 | |
| MEXICO | Signature | 15/06/1897 | |
| MONTENEGRO | Signature | 15/06/1897 | |
| NETHERLANDS THE | Signature | 15/06/1897 | |
| NORWAY | Signature | 15/06/1897 | |
| ORANGE FREE STATE | Signature | 15/06/1897 | |
| PANAMA | Accession | 05/10/1904 | |
| PANAMA | Declaration | 05/10/1904 | |
| PARAGUAY | Signature | 15/06/1897 | |
| PERSIA | Signature | 15/06/1897 | |
| PERSIA | Accession | 18/09/1903 | |
| PERSIA | Declaration | 18/09/1903 | |
| PERU | Signature | 15/06/1897 | |
| PORTUGAL | Signature | 15/06/1897 | |
| ROUMANIA | Signature | 15/06/1897 | |
| RUSSIA | Signature | 15/06/1897 | |
| SERBIA | Signature | 15/06/1897 | |
| SIAM | Signature | 15/06/1897 | |
| SOUTH AFRICA | Signature | 15/06/1897 | |
| SPAIN | Signature | 15/06/1897 | |
| SWEDEN | Signature | 15/06/1897 | |
| SWITZERLAND | Signature | 15/06/1897 | |
| TUNIS | Signature | 15/06/1897 | |
| TURKEY | Signature | 15/06/1897 | |
| UNITED KINGDOM | Signature | 15/06/1897 | |
| UNITED KINGDOM | Ratification | 18/04/1898 | |
| UNITED KINGDOM | Accession | 22/11/1898 | |
| UNITED STATES OF AMERICA | Signature | 15/06/1897 | |
| URUGUAY | Signature | 15/06/1897 | |
| VENEZUELA | Signature | 15/06/1897 | |