California Code, Public Utilities Code - PUC § 120267

(a) The board may, by ordinance, regulate vehicle safety and driver qualifications for passenger jitney service operating between cities in the County of San Diego and between a city in the County of San Diego and unincorporated portions of the County of San Diego.

(b) The board shall levy the fees necessary to recover the full cost of regulating these services.

(c) For purposes of this section, the term “passenger jitney service” includes every corporation or person engaged as a common carrier, for compensation, in the ownership, control, operation, or management of a passenger transportation service by motor vehicles of not more than 15-passenger capacity, excluding the driver, that operates between fixed termini and over a regular route and generally on short nonscheduled headways.