Mo. Rev. Stat. § 386.071: General counsel authorized, qualifications, duties.

The public service commission may appoint and fix the compensation of a general counsel to serve at the pleasure of the commission. He shall be an attorney at law and shall have resided in this state prior to his* appointment. It shall be the duty of the general counsel for the commission to represent and appear for the commission in all actions and proceedings involving any question under this or any other law, or under or in reference to any act, order, decision or proceeding of the commission, and if directed to do so by the commission, to intervene, if possible, in** any action or proceeding in which any such question is involved; to commence and prosecute in the name of the state all actions and proceedings, authorized by law and directed or authorized by the commission, and to expedite in every way possible, to final determination all such actions and proceedings; to advise the commission and each commissioner, when so requested, in regard to all matters in connection with the powers and duties of the commission and the members thereof, and generally to perform all duties and services as attorney and counsel to the commission which the commission may reasonably require of him.