California Vehicle Code
Sec. § 635

A “trailer coach” is a vehicle, other than a motor vehicle, designed for human habitation or human occupancy for industrial, professional, or commercial purposes, for carrying property on its own structure, and for being drawn by a motor vehicle. A “park trailer,” as described in Section 18009.3 of the Health and Safety Code, is a trailer coach.
Last accessed
Jun. 6, 2016