California Vehicle Code
Sec. § 267


A converter is a person, other than a vehicle manufacturer, who, prior to the retail sale of a new vehicle, does any of the following to the vehicle:

(a)

Assembles, installs, or affixes a body, cab, or special equipment to the vehicle chassis.

(b)

Substantially adds to, subtracts from, or modifies the vehicle, if it is a previously assembled or manufactured new vehicle.
Source
Last accessed
Jun. 6, 2016