| (Source: ILOLEX - 29. 11. 2009) |
| Country | Ratification date | Status |
| Austria | 18:02:1929 | ratified |
| Bosnia and Herzegovina | 02:06:1993 | ratified |
| Bulgaria | 01:11:1930 | ratified |
| Chile | 08:10:1931 | ratified |
| Colombia | 20:06:1933 | ratified |
| Croatia | 08:10:1991 | ratified |
| Germany | 23:01:1928 | ratified |
| Haiti | 19:04:1955 | ratified |
| Luxembourg | 16:04:1928 | ratified |
| The former Yugoslav Republic of Macedonia | 17:11:1991 | ratified |
| Montenegro | 03:06:2006 | ratified |
| Netherlands | 15:11:1965 | ratified |
| Nicaragua | 12:04:1934 | ratified |
| Norway | 29:05:1961 | ratified |
| Peru | 01:02:1960 | ratified |
| Poland | 29:09:1948 | ratified |
| Serbia | 24:11:2000 | ratified |
| Slovenia | 29:05:1992 | ratified |
| Spain | 29:09:1932 | ratified |
| United Kingdom | 20:02:1931 | ratified |
| Uruguay | 06:06:1933 | denounced on 28:07:1978 |
| Ratified: 20 | Conditional ratification: 0 | Declared applicable: 0 | Denounced: 1 |
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