California Code, Vehicle Code - VEH § 12517.45

(A) A valid driver's license of a class appropriate to the vehicle driven and that is endorsed for passenger transportation.

(B) Either a certificate to drive a schoolbus as described in Section 40082 of the Education Code, or a certificate to drive a school pupil activity bus as described in Section 40083 of the Education Code, issued by the department in accordance with eligibility and training requirements specified by the department, the State Department of Education, and the Department of the California Highway Patrol.

(C) A parental authorization form for each pupil signed by a parent or a legal guardian of the pupil that gives permission for that pupil to be transported to or from the school or school-related activity.

(2)(A) The motor vehicle has passed an annual inspection conducted by the Department of the California Highway Patrol and is in compliance with the charter-party carrier's responsibilities under Section 5374 of the Public Utilities Code.

(B) The Department of the California Highway Patrol may charge a charter-party carrier a reasonable fee sufficient to cover the costs incurred by the Department of the California Highway Patrol in conducting the annual inspection of a motor vehicle.