| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALBANIA | Ratification | 17/03/1932 | |
| ALGERIA | Ratification | 19/10/1962 | |
| ANGOLA | Succession | 04/06/1976 | |
| ARGENTINA | Ratification | 30/11/1933 | |
| AUSTRIA | Ratification | 12/06/1924 | |
| BANGLADESH | Ratification | 22/06/1972 | |
| BELGIUM | Ratification | 12/07/1924 | |
| BRAZIL | Ratification | 26/04/1934 | |
| BULGARIA | Ratification | 14/02/1922 | |
| BURMA | Bound | 01/01/1905 | 14/07/1921 |
| CAMBODIA | Ratification | 24/02/1969 | |
| CAMEROON | Ratification | 07/06/1960 | |
| CAMEROON | Ratification | 03/09/1962 | |
| CAMEROON | Denunciation | 11/04/1975 | 11/04/1976 |
| CENTRAL AFRICAN REPUBLIC | Ratification | 27/10/1960 | |
| CEYLON | Ratification | 26/10/1950 | |
| CEYLON | Denunciation | 16/02/1954 | |
| CHAD | Ratification | 10/11/1960 | |
| CHILE | Ratification | 15/09/1925 | |
| CHINA | Declaration | 19/10/1999 | |
| COLOMBIA | Ratification | 13/04/1983 | |
| COMOROS | Succession | 23/10/1978 | |
| CONGO, REPUBLIC OF | Ratification | 10/11/1960 | |
| CUBA | Ratification | 06/08/1928 | |
| DAHOMEY | Ratification | 12/12/1960 | |
| DENMARK | Ratification | 04/01/1923 | |
| DENMARK | Declaration | 31/05/1954 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| DJIBOUTI | Denunciation | 29/05/2008 | |
| ESTONIA | Declaration | 01/01/1905 | |
| ESTONIA | Ratification | 20/12/1922 | |
| FRANCE | Ratification | 25/08/1925 | |
| GABON | Ratification | 14/10/1960 | |
| GREECE | Ratification | 19/11/1920 | |
| Greenland | Extension | 31/05/1954 | |
| GUINEA | Ratification | 21/01/1959 | |
| GUINEA | Denunciation | 28/05/1968 | 28/05/1969 |
| GUINEA BISSAU | Succession | 21/02/1977 | |
| HUNGARY | Ratification | 19/04/1928 | |
| INDIA | Ratification | 14/07/1921 | |
| IRELAND, REPUBLIC OF | Ratification | 04/09/1925 | |
| ITALY | Ratification | 10/04/1923 | |
| ITALY | Declaration | 28/12/1953 | |
| IVORY COAST | Ratification | 21/11/1960 | |
| LAOS | Ratification | 23/01/1964 | |
| LATVIA | Ratification | 03/06/1929 | |
| LITHUANIA | Ratification | 19/06/1931 | |
| LUXEMBOURG | Ratification | 10/04/1928 | |
| MADAGASCAR | Ratification | 01/11/1960 | |
| MALI | Ratification | 21/06/1960 | |
| MAURITANIA | Ratification | 20/06/1961 | |
| MEXICO | Ratification | 20/05/1937 | |
| MEXICO | Denunciation | 20/06/1956 | |
| NETHERLANDS THE | Ratification | 17/03/1924 | |
| NETHERLANDS THE | Denunciation | 22/10/1954 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NIGER | Ratification | 27/02/1961 | |
| PAKISTAN | Ratification | 01/01/1905 | 14/07/1921 |
| POLAND | Ratification | 21/06/1924 | |
| PORTUGAL | Ratification | 10/05/1932 | |
| PORTUGAL | Declaration | 04/10/1999 | |
| ROMANIA | Ratification | 13/06/1921 | |
| SENEGAL | Ratification | 04/11/1960 | |
| Somaliland | Extension | 28/12/1953 | |
| SPAIN | Ratification | 29/09/1932 | |
| SWITZERLAND | Ratification | 09/10/1922 | |
| TOGO | Ratification | 07/06/1960 | |
| TUNISIA | Ratification | 12/01/1959 | |
| TUNISIA | Denunciation | 24/05/1974 | 24/05/1975 |
| UNITED KINGDOM | Ratification | 14/07/1921 | |
| UNITED KINGDOM | Denunciation | 04/10/1947 | 04/10/1948 |
| UPPER VOLTA | Ratification | 21/11/1960 | |
| URUGUAY | Ratification | 06/06/1933 | |
| URUGUAY | Denunciation | 17/10/1955 | |
| VENEZUELA | Ratification | 07/03/1933 | |
| VIETNAM | Ratification | 06/06/1953 | |
| VIETNAM, SOCIALIST REP OF | Ratification | 03/10/1994 | |
| YUGOSLAVIA | Ratification | 01/01/1927 | |
| YUGOSLAVIA | Denunciation | 20/02/1957 |