<ul><li><a href=http://www.gesetze-im-internet.de/stvo_2013/ target=_blank>Road Traffic Ordinance(Straßenverkehrs-Ordnung StVO par. 35(7a), 6 March 2013 (BGBl. I p. 367), last updated on 12 July 2021 (BGBl. I p. 3091))</a></li></ul>