US lawMontanaStatutesTitle 1Chapter 2Part 11-2-109Mont. Code Ann. § 1-2-1091-2-109 When laws retroactiveYear: 2026Length: 21 wordsOfficial source 1-2-109 . When laws retroactive. No law contained in any of the statutes of Montana is retroactive unless expressly so declared.PreviousMont. Code Ann. § 1-2-108NextMont. Code Ann. § 1-2-110