Basic legislation for the whole agriculture is given by the Act No. 252/1997 Coll., on Agriculture, as amended.

http://eagri.cz/public/web/mze/legislativa/pravni-predpisy-mze/tematicky-prehled/Legislativa-MZe_uplna-zneni_zakon-1997-252-viceoblasti.html (available in Czech language only).