Mo. Rev. Stat. § 29.110
Current with changes from the 2023 Legislative Session
The state auditor or such person or persons in his department as he may designate in writing shall have power to administer all oaths and affirmations required or allowed by law, in matters touching the duties of his office.
§ 29.110, RSMo
RSMo 1939 § 13068, A.L. 1945 p. 584 § 18