Mont. Code Ann. § 7-2-4733

The plan required in 7-2-4732 must include a methodology whereby the residents within the area to be annexed may vote on any proposed capital improvements. If less than 50% of the residents in the section or sections to be annexed vote in favor of the annexation, the area may not be annexed. An election pursuant to this section must be conducted as provided in Title 13, chapter 1, part 4.