(a) A person may not engage in the business of buying, selling, or exchanging new motor vehicles unless the person:
(1) holds a franchised dealer's license issued under this chapter for the make of new motor vehicle being bought, sold, or exchanged; or
(2) is a bona fide employee of the holder of a franchised dealer's license.
(b) For purposes of this section:
(1) the make of a conversion is that of the chassis manufacturer;
(2) the make of a motor home is that of the motor home manufacturer;
(3) the make of an ambulance is that of the ambulance manufacturer; and
(4) the make of a fire-fighting vehicle is that of the fire-fighting vehicle manufacturer.