Texas Administrative Code, Title 43, Part 10, Chapter 217, Subchapter A, Rule 217.3

(6) Not eligible for Title. The following are not eligible for a Texas Title regardless of the vehicles previous title/or registration in this or any jurisdiction.
(A) Vehicles that are missing or stripped of their motor, frame, or body, to the point that it materially alters the manufacturer’s original design or makes the vehicle unsafe for on-road operation as determined by the department.
(B) Vehicles designed or determined by the department to be a Dune Buggy.
Additionally, Transportation Code 502.048 allows the department to refuse registration to any motor vehicle the department determines to be unsafe, improperly equipped, or otherwise unfit to be operated on a [public highway.