Art. 4. [prohibition of forced labour]
(1) Forced labour shall be prohibited.
(2) “Forced labour” means any work or service imposed on a person under threat or for which he/she did not freely express his/her consent.
(3) The work or activity imposed by the public authorities for the following purposes shall not constitute forced labour:
a) pursuant to the law on the compulsory military service;
b) for the fulfilment of the civic duties established by law;
c) on the basis of a final judicial conviction, under the terms of the law;
d) in case of an act of God, respectively in case of war, disasters or disaster danger such as: fire, flood, earthquake, serious epidemic and epizootic, animal or insect invasions and, generally, in all circumstances threatening the life or the normal living conditions of the entire population or a part of it.