Every dealer who displays or offers one or more used vehicles for sale at retail shall post a notice not less than 8 inches high and 10 inches wide, in a place conspicuous to the public, which states the following:
“The prospective purchaser of a vehicle may, at his or her own expense and with the approval of the dealer, have the vehicle inspected by an independent third party either on or off these premises.”
Source:
Section 11709.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=VEH§ionNum=11709.1..