Mont. Code Ann. § 85-6-105

Such water users' association shall be permitted to divide the area under such irrigation project into as many districts as there are directors provided for in its articles of incorporation. Each district shall elect one director for a term not to exceed 5 years. At the first election held to elect directors under the provisions of this chapter, each district shall elect one director, who shall hold office for such a term of years as the bylaws shall provide, and thereafter a director shall be elected in the district and at the annual election held just prior to the expiration of the term of office of the director of that district.