Texas Government Code - GOV'T § 2113.013. Use of Motor Vehicle

(a) Except as provided by Subsection (b), an officer or employee of a state agency may not use a state-owned or state-leased motor vehicle except on official state business.

(b) The administrative head of a state agency may authorize an officer or employee to use a state-owned or state-leased motor vehicle to commute to and from work when the administrative head determines that the use may be necessary to ensure that vital agency functions are performed. The name and job title of each individual authorized under this subsection, and the reasons for the authorization, must be included in the report required by Section 2101.0115.

(c) A state agency may not use appropriated money to compensate an individual who violates Subsection (a).