A vehicle salesman may not fail to account for and remit to his dealership any payment received by him in connection with a vehicle sales contract. A vehicle salesman may not do any act that a dealer is prohibited from doing under § 15–312 of this title as to vehicle sales transactions. A vehicle salesman may not do any act that a dealer is prohibited from doing under § 15–313 of this title on prohibited advertising practices. A vehicle salesman may not misrepresent any material fact in obtaining a license. A vehicle salesman may not do any vehicle sales business with or through any person required to be licensed under this title if he knows that the person is not licensed. A vehicle salesman may not willfully fail to comply with any rule, regulation, or lawful order adopted by the Administration under this title. A person convicted of a violation of this section is subject to imprisonment not exceeding 2 months or a fine not exceeding $500 or both.