US lawMontanaStatutesTitle 70Chapter 1Part 370-1-320Mont. Code Ann. § 70-1-320Perpetual interest -- durationLast amended: 1895Year: 2026Length: 18 wordsOfficial source 70-1-320 . Perpetual interest -- duration. A perpetual interest has a duration equal to that of the property.PreviousMont. Code Ann. § 70-1-319NextMont. Code Ann. § 70-1-321