California Code, Education Code - EDC § 39875

(a) Except as provided pursuant to subdivisions (b) to (g), inclusive, this article shall apply to all drivers employed by a local educational agency, contracted by a local educational agency, or contracted by any entity with funding from a local educational agency, providing school-related pupil transportation for compensation.

(b) Nothing in this article shall be construed to apply to a driver employed by any of the following:

(c) Nothing in this article shall be construed to apply to any of the following persons who are compensated to drive a pupil:

(d) If both of the following occur, nothing in this article shall be construed to apply to a school employee of a local educational agency when the employee provides transportation to pupils due to or because of the employee's supervision of pupils for a field trip, extracurricular activity, or athletic program, or when the employee provides transportation to pupils for other activities, not to exceed 40 hours of drive time per school year per employee:

(e) Nothing in this article shall be construed to apply to a driver who transports a pupil who must be immediately transported to a facility in the case of a medical or psychiatric emergency, or in the case of pupils who need to be transported immediately as the result of an emergency that arises as a result of a fire, flood, earthquake, or epidemic, or because of any order of any military officer of the United States or of the state to meet an emergency created by war, or because of an immediate threat to the physical safety of the pupil or pupils.  The exemption pursuant to this subdivision involving an epidemic shall only apply to each epidemic for a period lasting no longer than one month.

(f) Nothing in this article shall be construed to apply to a driver who transports a pupil if the transportation is being provided through a Foster Youth Services Coordinating Program while a pupil's transportation plan is being finalized.  The exemption pursuant to this subdivision shall apply for a period lasting no longer than one month after the first ride is provided to that pupil under this exemption.

(g) Nothing in this article shall be construed to apply to a driver during a trip for which they are authorized by the local educational agency to transport one or more pupils for a field trip when the destination is more than 200 miles from the transported pupil's California school campus.