“Commercial modular” means a structure transportable in one or more sections, designed and equipped for human occupancy for industrial, professional, or commercial purposes, which is required to be moved under permit, and shall include a trailer coach as defined in Section 635 of the Vehicle Code. “Commercial coach” has the same meaning as “commercial modular” as that term is defined in this section.
Source:
Section 18001.8, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=18001.8..