Mont. Code Ann. § 20-6-417

Whenever district boundaries are changed, title to the real and personal property of the districts involved in such boundary change shall vest in the district which encompasses the territory where such real or personal property was located at the time the legal procedure to authorize the boundary change was introduced. The disposition or utilization of such property will be in the discretion of the trustees of the district encompassing the territory of its location, as provided by law.