| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINA | Signature | 28/06/1930 | |
| ARGENTINA | Ratification | 14/03/1950 | |
| AUSTRIA | Signature | 28/06/1930 | |
| AUSTRIA | Ratification | 16/02/1933 | |
| BOLIVIA | Signature | 28/06/1930 | |
| BOLIVIA | Ratification | 15/11/1973 | |
| BULGARIA | Signature | 28/06/1930 | |
| BULGARIA | Ratification | 22/06/1932 | |
| CHILE | Signature | 28/06/1930 | |
| CHILE | Ratification | 18/10/1935 | |
| COLOMBIA | Signature | 28/06/1930 | |
| COLOMBIA | Ratification | 04/03/1969 | |
| CUBA | Signature | 28/06/1930 | |
| CUBA | Ratification | 24/02/1936 | |
| EGYPT | Signature | 28/06/1930 | |
| EGYPT | Ratification | 10/05/1960 | |
| EQUATORIAL GUINEA | Signature | 28/06/1930 | |
| EQUATORIAL GUINEA | Ratification | 12/06/1985 | 12/06/1985 |
| FINLAND | Signature | 28/06/1930 | |
| FINLAND | Ratification | 13/01/1936 | |
| FINLAND | Denunciation | 23/06/1999 | 23/06/2000 |
| GHANA | Signature | 28/06/1930 | |
| GHANA | Ratification | 19/06/1974 | |
| GUATEMALA | Signature | 28/06/1930 | |
| GUATEMALA | Ratification | 04/08/1961 | |
| HAITI | Signature | 28/06/1930 | |
| HAITI | Ratification | 31/03/1952 | |
| IRAQ | Signature | 28/06/1930 | |
| IRAQ | Ratification | 26/11/1962 | |
| ISRAEL | Signature | 28/06/1930 | |
| ISRAEL | Ratification | 26/06/1951 | |
| KUWAIT | Signature | 28/06/1930 | |
| KUWAIT | Ratification | 21/09/1961 | 21/09/1962 |
| LEBANON | Signature | 28/06/1930 | |
| LEBANON | Ratification | 01/06/1977 | |
| LUXEMBOURG | Signature | 28/06/1930 | |
| LUXEMBOURG | Ratification | 03/03/1958 | |
| MEXICO | Signature | 28/06/1930 | |
| MEXICO | Ratification | 12/05/1934 | |
| MOROCCO | Signature | 28/06/1930 | |
| MOROCCO | Ratification | 22/07/1974 | |
| MOZAMBIQUE | Signature | 28/06/1930 | |
| MOZAMBIQUE | Ratification | 06/06/1977 | |
| NEW ZEALAND | Signature | 28/06/1930 | |
| NEW ZEALAND | Ratification | 29/03/1938 | |
| NEW ZEALAND | Denunciation | 09/06/1989 | |
| NICARAGUA | Signature | 28/06/1930 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NORWAY | Signature | 28/06/1930 | |
| NORWAY | Ratification | 29/06/1953 | |
| PANAMA | Signature | 28/06/1930 | |
| PANAMA | Ratification | 16/02/1959 | |
| PARAGUAY | Signature | 28/06/1930 | |
| PARAGUAY | Ratification | 21/03/1966 | |
| SAUDI ARABIA | Signature | 28/06/1930 | |
| SAUDI ARABIA | Ratification | 15/06/1978 | 15/06/1979 |
| SPAIN | Signature | 28/06/1930 | |
| SPAIN | Ratification | 29/08/1932 | |
| SYRIA | Signature | 28/06/1930 | |
| SYRIA | Ratification | 30/10/1961 | |
| UNITED KINGDOM | | | |
| URUGUAY | Signature | 28/06/1930 | |
| URUGUAY | Ratification | 06/06/1933 | |