Sec. 9. (a) Except as provided in subsection (b), this chapter does not affect the reciprocity laws between states concerning license plates on commercial motor vehicles.
(b) If there is a conflict between this chapter and the unified carrier registration system established under 49 U.S.C. 13908 et seq. and the regulations adopted by the United States Secretary of Transportation under 49 U.S.C. 13908 et seq., the federal statute and regulations control.