| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Alderney | Extension | 04/02/1914 | 01/07/1912 |
| Australia | Extension | 01/07/1912 | 13/11/1913 |
| AUSTRALIA | Accession | 14/04/1928 | |
| AUSTRIA | Accession | 11/09/1920 | 01/10/1920 |
| Bechuanaland | Extension | 14/06/1912 | 01/07/1912 |
| BELGIUM | Signature | 13/11/1908 | |
| BELGIUM | Ratification | 09/06/1910 | |
| BRAZIL | Accession | 09/02/1922 | |
| British East Africa | Extension | 14/06/1912 | 01/07/1912 |
| BULGARIA | Accession | 05/12/1921 | |
| Canada | Accession | 07/01/1924 | 01/01/1924 |
| Canada | Notification | 10/04/1928 | |
| Curacao | Extension | 01/04/1913 | |
| Cyprus | Extension | 14/06/1912 | 01/07/1912 |
| CZECHOSLOVAKIA | Acceptance | 22/02/1921 | |
| DANZIG | Accession | 24/06/1922 | |
| DENMARK | Signature | 13/11/1908 | |
| DENMARK | Ratification | 28/06/1912 | |
| East Indies | Extension | 15/01/1913 | 01/04/1913 |
| ESTONIA | Accession | 09/06/1927 | |
| ESTONIA | Reservation | 09/06/1927 | |
| FINLAND | Accession | 01/04/1928 | |
| FINLAND | Reservation | 01/04/1928 | |
| FRANCE | Signature | 13/11/1908 | |
| FRANCE | Ratification | 30/09/1910 | |
| French Colonies | Accession | 26/05/1930 | |
| GERMANY | Signature | 13/11/1908 | |
| GERMANY | Ratification | 09/06/1910 | |
| Gilbert & Ellice Colony | Extension | 14/06/1912 | 01/07/1912 |
| Gold Coast | Extension | 14/06/1912 | 01/07/1912 |
| GREECE | Accession | 09/11/1920 | |
| Guernsey | Extension | 04/02/1914 | |
| Guernsey, Bailiwick of | Extension | 21/08/2014 | 21/11/2014 |
| HAYTI | Denunciation | 26/03/1943 | |
| HAYTI | Ratification | 09/06/1910 | |
| HAYTI | Withdrawal | 26/03/1942 | 26/03/1943 |
| HUNGARY | Accession | 14/02/1922 | |
| India | Extension | 04/02/1914 | 30/10/1912 |
| INDIA | Accession | 23/04/1928 | 01/04/1928 |
| Irish Free State | Extension | 05/10/1927 | 05/10/1927 |
| ITALY | Signature | 13/11/1908 | |
| ITALY | Ratification | 23/09/1914 | |
| JAPAN | Signature | 13/11/1908 | |
| JAPAN | Ratification | 09/06/1910 | |
| Jersey | Extension | 04/02/1914 | 08/03/1913 |
| LEBANON | Accession | 01/08/1924 | |
| LIBERIA | Signature | 13/11/1908 | |
| LIBERIA | Ratification | 09/06/1910 | |
| LIBERIA | Denunciation | 22/02/1929 | 22/02/1930 |
| LIECHTENSTEIN | Accession | 30/07/1931 | |
| LUXEMBOURG | Signature | 13/11/1908 | |
| LUXEMBOURG | Ratification | 09/06/1910 | |
| MONACO | Signature | 13/11/1908 | |
| MONACO | Ratification | 09/06/1910 | |
| Morocco | Extension | 16/06/1917 | |
| NETHERLANDS THE | Accession | 09/10/1912 | 01/11/1912 |
| New Zealand | Extension | 30/03/1914 | 01/04/1914 |
| NEW ZEALAND | Accession | 26/04/1928 | 24/04/1928 |
| Nigeria, North | Extension | 14/06/1912 | 01/07/1912 |
| Nigeria, South | Extension | 14/06/1912 | 01/07/1912 |
| Norfolk Island | Extension | 01/07/1912 | 13/11/1913 |
| Northern Rhodesia | Extension | 14/06/1912 | 01/07/1912 |
| NORWAY | Signature | 13/11/1908 | |
| NORWAY | Ratification | 04/09/1910 | |
| NORWAY | Reservation | 04/09/1910 | |
| NORWAY | Withdrawal | 12/12/1931 | |
| Nyasaland | Extension | 14/06/1912 | 01/07/1912 |
| Palestine | Accession | 17/03/1924 | 21/03/1924 |
| Papua | Extension | 01/02/1913 | 13/11/1913 |
| POLAND | Accession | 28/01/1920 | |
| PORTUGAL | Accession | 29/03/1911 | |
| ROUMANIA | Accession | 01/01/1927 | |
| ROUMANIA | Reservation | 01/01/1927 | |
| Sark | Extension | 04/02/1914 | 01/07/1912 |
| SIAM | Accession | 17/07/1931 | |
| Sierra Leone | Extension | 14/06/1912 | 01/07/1912 |
| Solomon Islands Protectorate | Extension | 14/06/1912 | 01/07/1912 |
| Somaliland | Extension | 14/06/1912 | 01/07/1912 |
| South Africa | Notification | 03/10/1928 | |
| South Africa | Accession | 28/04/1920 | 01/05/1920 |
| South Africa | Reservation | 28/04/1920 | |
| South West Africa | Accession | 28/10/1931 | |
| Southern Rhodesia | Extension | 14/06/1912 | 01/07/1912 |
| SPAIN | Signature | 13/11/1908 | |
| SPAIN | Ratification | 07/09/1910 | |
| Surinam | Extension | 01/04/1913 | |
| Swaziland | Extension | 14/06/1912 | 01/07/1912 |
| SWEDEN | Signature | 13/11/1908 | |
| SWEDEN | Ratification | 22/09/1919 | 01/01/1920 |
| SWEDEN | Reservation | 22/09/1919 | |
| SWITZERLAND | Signature | 13/11/1908 | |
| SWITZERLAND | Ratification | 09/06/1910 | |
| SYRIA | Accession | 01/08/1924 | |
| The Gambia | Extension | 14/06/1912 | 01/07/1912 |
| TUNIS | Signature | 13/11/1908 | |
| TUNIS | Ratification | 30/06/1910 | |
| Uganda | Extension | 14/06/1912 | 01/07/1912 |
| UNITED KINGDOM | Signature | 13/11/1908 | |
| UNITED KINGDOM | Ratification | 14/06/1912 | |
| Weihaiwei | Extension | 14/06/1912 | 01/07/1912 |
| YUGOSLAVIA | Accession | 17/06/1930 | |
| YUGOSLAVIA | Reservation | 17/06/1930 |