"Transit" means the transportation of passengers only and their incidental baggage by means other than by chartered bus, sightseeing bus, or any other motor vehicle not on an individual fare-paying basis, and includes rapid transit. Nothing in this section shall be construed to prohibit the district from leasing its buses to private certified public carriers or to prohibit the district from providing schoolbus service for the transportation of pupils between their homes and schools.
Ca. Pub. Util. Code § 98005