Subpoenas may be signed and issued by the presiding officer or, at the commission's direction, by the commission counsel. No subpoena shall issue unless the applicant establishes that he or she has a proper relation to the matter. The name and address of the person or persons to whom the subpoena is issued shall be inserted in the original subpoena, a copy and the return of which shall be filed in the proceeding. A subpoena shall show at whose instance the subpoena is issued.
Mo. Sup. Ct. Op. R 12-17.05