Mont. Code Ann. § 70-27-107
Action for possession under right of reentry -- notice not required
70-27-107 . Action for possession under right of reentry -- notice not required. An action for the possession of real property leased or granted with a right of reentry may be maintained at any time in the district court, after the right to reenter has accrued, without the notice prescribed in 70-27-106 .