Mo. Rev. Stat. § 386.580

Every officer, agent or employee of any corporation or public utility, who violates or fails to comply with, or who procures, aids or abets any violation by any corporation, person or public utility of any provision of the constitution of this state or of this or any other law, or who fails to obey, observe or comply with any order, decision, decree, rule, direction, demand or requirement, or any part or provision thereof, of the commission, or who procures, aids or abets any corporation, person or public utility in their or its failure to obey, observe and comply with any such order, decision, decree, rule, direction, demand or requirement, or any part or provision thereof, in a case in which a penalty has not herein been provided for such officer, agent or employee, is guilty of a misdemeanor and is punishable by a fine not exceeding one thousand dollars, or by imprisonment in a county jail not exceeding one year, or by both such fine and imprisonment.