23. (1) An authorised official must use the free acceleration test method in order to determine whether a compression ignition powered vehicle is being driven or used in contravention of section 21 (1).
Inkqubo yovavanyo 23. (1) Igosa eligunyazisiweyo malisebenzise inkqubo yokunyusa umcephe wesantya isithuthi singahambi ukuze kuqondisiswe ukuba isithuthi eso esisebenzisa ucinezelo lwenjini siqhutywa okanye sisetyenziswa ngokuchasene necandelo lama-21 (1).