Sec. 622.001. DEFINITIONS. In this chapter: (1) "Commission" means the Texas Transportation Commission. (2) "Department" means the Texas Department of Motor Vehicles. Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995. Amended by: Acts 2011, 82nd Leg., R.S., Ch. 1345 (S.B. 1420), Sec. 65, eff. September 1, 2011.