Mont. Code Ann. § 20-20-301
20-20-301 Qualifications of elector
20-20-301 . Qualifications of elector. An individual is entitled to vote at school elections if the individual has the qualifications set forth in 13-1-111 and is a resident of the school district or, in a school district that has been apportioned into single-member trustee districts according to 20-3-337 , a resident of the trustee district.