Any commercial motor vehicle designed to transport any liquid or gaseous materials within a tank that is either permanently or temporarily attached to the vehicle or the chassis. Such vehicles include but are not limited to cargo tanks and portable tanks as defined by 49 C.F.R., Part 171. Provided however, the term "tank vehicle" shall not include a portable tank having a rated capacity of under one thousand (1,000) gallons.

Laws 1990, HB 1989, c. 219, § 8, eff. January 1, 1991; Amended by Laws 1992, HB 2431, c. 217, § 2, emerg. eff. July 1, 1992.