California Code, Business and Professions Code - BPC § 147

(a) Any employee designated by the director shall have the authority to issue a written notice to appear in court pursuant to Chapter 5c (commencing with Section 853.5) of Title 3 of Part 2 of the Penal Code.  Employees so designated are not peace officers and are not entitled to safety member retirement benefits, as a result of such designation.  The employee's authority is limited to the issuance of written notices to appear for infraction violations of provisions of this code and only when the violation is committed in the presence of the employee.

(b) There shall be no civil liability on the part of, and no cause of action shall arise against, any person, acting pursuant to subdivision (a) and within the scope of his or her authority, for false arrest or false imprisonment arising out of any arrest which is lawful or which the person, at the time of such arrest, had reasonable cause to believe was lawful.