A person who is licensed in accordance with Title 29-A, section 951 and whose primary business is the buying and selling of new motor homes is exempt from section 3203 as it relates to that person's primary business. A "motor home" means a motor vehicle that is primarily designed as temporary living quarters and:
1. Part of vehicle. Is built onto or is an integral part of the motor vehicle chassis; and
2. Contains living systems. Contains independent living systems that are part of the manufacturing process that include cooking facilities, plumbing with external evacuation or that is self-contained, electrical capabilities, a heating source powered separately from the engine and a water system that includes a sink and faucet.