California Code, Vehicle Code - VEH § 34501.1

A manufacturer or distributor of wheelchair lifts for buses, schoolbuses, youth buses, and general public transit vehicles, regardless of capacity, shall, prior to the distribution of the wheelchair lift model in California, provide to the Department of the California Highway Patrol proof of certification from an independent laboratory or registered mechanical engineer of this state that the wheelchair lift model complies with the California and any federal law and the regulations adopted pursuant thereto.