Texas Government Code - GOV'T § 556.004. Prohibited Acts of Agencies and Individuals

(a) A state agency may not use any money under its control, including appropriated money, to finance or otherwise support the candidacy of a person for an office in the legislative, executive, or judicial branch of state government or of the government of the United States.  This prohibition extends to the direct or indirect employment of a person to perform an action described by this subsection.

(b) A state officer or employee may not use a state-owned or state-leased motor vehicle for a purpose described by Subsection (a).

(c) A state officer or employee may not use official authority or influence or permit the use of a program administered by the state agency of which the person is an officer or employee to interfere with or affect the result of an election or nomination of a candidate or to achieve any other political purpose.

(d) A state employee may not coerce, attempt to coerce, command, restrict, attempt to restrict, or prevent the payment, loan, or contribution of any thing of value to a person or political organization for a political purpose.

(e) For purposes of Subsection (c), a state officer or employee does not interfere with or affect the results of an election or nomination if the individual's conduct is permitted by a law relating to the individual's office or employment and is not otherwise unlawful.