Haw. Rev. Stat. § 437-15: Principals held responsible.

Every holder of a license issued under this chapter may be held responsible for the conduct of the holder's agents and employees in all transactions regarding motor vehicles, motor vehicle parts, franchises, and transactions involving a subject or matter within the jurisdiction of the board. No licensee shall permit any person not licensed under this chapter to sell or exchange or offer to sell or exchange any motor vehicle on the premises specified in the license or to sell or exchange any motor vehicle on behalf of the licensee off the premises specified in the license.