Tex. Occ. Code § 2401.052
(a) To administer this chapter, the department may:
(1) examine:
(2) question under oath any person who
is associated with the business of a transportation service provider.
Added by Acts 2001, 77th Leg., ch. 1421, Sec. 5, eff. June 1, 2003.
Amended by Acts 2003, 78th Leg., ch. 816, Sec. 17.003, eff. Sept. 1, 2003.