California Code, Vehicle Code - VEH § 12517.1

(1) A motor vehicle accident resulting in property damage in excess of one thousand dollars ($1,000), or personal injury, on public or private property, and involving a schoolbus, youth bus, school pupil activity bus, or general public paratransit vehicle transporting a pupil.

(2) A collision between a vehicle and a pupil or a schoolbus driver while the pupil or driver is crossing the highway when the schoolbus flashing red signal lamps are required to be operated pursuant to Section 22112 or when the schoolbus is stopped for the purpose of loading or unloading pupils.

(3) Injury of a pupil inside a vehicle described in paragraph (1) as a result of acceleration, deceleration, or other movement of the vehicle.