<ul><li><a href=https://www.zakonyprolidi.cz/cs/2005-127 target=_blank>Electronic Communications Act(Zákon o elektronických komunikacích, Act No. 127/2005 Coll., last update on 1 January 2021, § 13 (3))</a></li><li><a href=https://www.zakonyprolidi.cz/cs/1991-455 target=_blank>Trade Licensing Act(Živnostenský zákon, Act No. 455/1991 Coll., last update on 1 January 2021, § 9 (b), 19, 20, Annex 1)</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>