Tex. Tax Code § 162.235 — USE OF DYED FUEL PROHIBITED

(a) A person may not operate a motor vehicle on a public highway in this state with taxable motor fuel that contains dye in the fuel supply tank of the motor vehicle. (b) This section does not apply to a use of dyed fuel that is lawful under the Internal Revenue Code and implementing regulations, including use in state and local government vehicles or buses, unless otherwise prohibited by this chapter. Added by Acts 2003, 78th Leg., ch. 199, Sec. 1, eff. Jan. 1, 2004. SUBCHAPTER D-1. COMPRESSED NATURAL GAS AND LIQUEFIED NATURAL GAS TAX