16 Tex. Admin. Code § 86.708
A towing company or tow truck operator must not operate or cause a tow truck to be operated on the public roadways of this State unless the tow truck displays current license plates that includes the words "Tow Truck."
Source Note:The provisions of this §86.708 adopted to be effective April 15, 2008, 33 TexReg 2940.