(a) Any person who engages directly or indirectly in purposeful contacts within this state in connection with the offering of advertising for sale or has business dealings with respect to a new motor vehicle sale within this state shall be subject to the provisions of this article and shall be subject to the jurisdiction of the courts of this state.

(b) The applicability of this article shall not be affected by a choice of law clause in any franchise, agreement, waiver, novation, or any other written instrument.

(c) Any provision of any franchise, agreement, waiver, novation, or any other written instrument executed, modified, extended, or renewed after July 1, 1983, which is in violation of any Code section of this article shall be deemed null and void and without force and effect.

(d) No franchisor shall use any subsidiary corporation, affiliated corporation, or any other controlled corporation, partnership, association, or person to accomplish what would otherwise be illegal conduct under this article on the part of the franchisor.