Tex. Rev. Civ. Stat. art. 3866

Failure to comply with any provision of this title shall subject the offending company and any officer, agent, or employe thereof, so offending, to a penalty of not less than one hundred nor more than five hundred dollars, to be recovered by suit therefor. The Railroad Commission shall notify the Attorney General of any violation of any provision of this title which shall come to its knowledge. In addition to said penalty, a failure to comply with any provision of this title shall be sufficient cause to cancel the permit of any express company so offending.