Any of the following individuals may act as a judge pro tempore: (1) a member of the bar of the state who meets the qualifications for judge of the district court as provided in 3-5-202; (2) a retired judge of the district court; (3) a justice of the peace for a justice's court of record, provided for in 3-10-101; (4) a municipal court judge; or (5) a retired justice of the supreme court.
Qualifications
Mont. Code Ann. § 3-5-114, under Definition of Districts and Assignment of Judges.
Mont. Code Ann. § 3-5-114