No person shall operate an “official” lamp or brake adjusting station unless a license therefor has been issued by the director. No person shall issue, or cause or permit to be issued, any certificate purporting to be an official lamp adjustment certificate unless he or she is a licensed lamp adjuster or an official brake adjustment certificate unless he or she is a licensed brake adjuster.
Source:
Section 9888.3, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=9888.3..