Texas Transportation Code - Section 501.002

§ 501.002.  DEFINITIONS.  In this chapter:  

(14)  "Motor vehicle" means: 
        (A)  any motor driven or propelled vehicle required to be registered under the laws of this state;
        (B)  a trailer or semitrailer, other than manufactured housing, that has a gross vehicle weight that exceeds 4,000 pounds;
        (C)  a house trailer;                                                       
        (D)  a four-wheel all-terrain vehicle designed by the manufacturer for off-highway use that is not required to be registered under the laws of this state;  or
        (E)  a motorcycle, motor-driven cycle, or moped that is not required to be registered under the laws of this state, other than a motorcycle, motor-driven cycle, or moped designed for and used exclusively on a golf course.

Acts 1995, 74th Leg., ch. 165, § 1, eff. Sept. 1, 1995.  Amended by Acts 1999, 76th Leg., ch. 414, § 2.42, eff. July 1, 2001;  Acts 2003, 78th Leg., ch. 1276, § 14A.821, eff. Sept. 1, 2003.