A city, county, or city and county may regulate the uniforms and insignias worn by uniformed employees of a private patrol operator and vehicles used by a private patrol operator to make the uniforms and vehicles clearly distinguishable from the uniforms worn by, and the vehicles used by, local regular law enforcement officers.
Source:
Section 7583.38, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=7583.38..