<ul><li><a href=https://www.zakonyprolidi.cz/cs/1991-455/zneni-20220701 target=_blank>Trade Licensing Act(Živnostenský zákon, Act No. 455/1991 Coll., last update on 1 July 2022, § 9 (a))</a></li><li><a href=http://ec.europa.eu/growth/tools-databases/regprof/index.cfm?action=regprofs target=_blank>Website of the European Commission, Regulated Professions in Czech Republic</a></li><li><a href=http://uok.msmt.cz/uok/ru_list.php?let=&type=1&org=0&dl=cz&pg=1 target=_blank>Website of the Ministry of Education, Database of Regulated Professions</a></li></ul>