Montana Title 3. Judiciary, Courts § 3-11-203. When substitute for judge called in

(1) The city judge or mayor may call in a city judge, a justice of the peace, or some qualified person to act in the judge's place whenever the judge is:

(2) The city judge may call in a city judge, justice of the peace, or some qualified person to act in the city judge's place when a disqualifying affidavit is filed against the judge pursuant to the supreme court's rules on disqualification and substitution of judges.

(3) A city judge of any city or a justice of the peace of any county may sit as city judge at the city judge's request.