Colo. Rev. Stat. § 40-9-104
Any common carrier subject to the provisions of sections 40-9-101 to 40-9-105, or, whenever such common carrier is a corporation, any director or officer thereof or any receiver, trustee, lessee, agent, or person acting for or employed by such corporation, or any shipper, consignee, or applicant for cars who alone or with any other corporation, company, person, or party willfully does or causes to be done or willfully suffers or permits to be done any act, matter, or thing prohibited by sections 40-9-101 to 40-9-105 or declared to be unlawful or who aids or abets therein, or willfully omits or fails to do any act, matter, or thing required to be done in said sections, or aids or abets any such omission or failure, or is guilty of any infraction of said sections, or aids or abets therein, or fails or refuses or neglects to obey any order of the commission made under the provisions of said sections is guilty of a misdemeanor and, upon conviction thereof, shall be punished by a fine of not less than one hundred dollars nor more than one thousand dollars for each offense.
C.R.S. § 40-9-104