Amend SB 113 by adding Subsection (e) in SECTION 2 of the bill (Committee Printing, page 1, line 63): (e) It is a defense to prosecution under this section that: (6) The person is operating a commercial vehicle registered as a farm vehicle under the provisions of Sec. 502.163 of the Transportation Code and that does not have a gross weight, registered weight, or gross weight rating of 48,000 pounds or more.