Montana Title 7. Local Government § 7-1-4137. Oath of office

(1) Every elected and appointed municipal officer shall take the oath of office prescribed in Article III, section 3, of the Montana constitution. Before the officer performs any official duties, the oath of office, certified by the official before whom the oath was taken, must be filed. An elected officer shall file the oath with the county election administrator. Except as provided in subsection (2), an appointed officer shall file the oath with the city clerk.

(2) A person appointed to fill a vacancy in an elected municipal office shall file the oath of office with the county election administrator.