Mont. Code § 85-7-1810
At such public hearing, the district court shall hear those who may desire changes made in the proposed extension, all those whose lands are included or sought to be included in the district, and all other persons whose rights may be affected by the proposed extension. Such public hearing may be adjourned from day to day, not exceeding 20 days in all, and the court shall make an order either granting or denying said petition. If said petition is granted, said order shall describe the lands included in said extension and the terms on which said land shall be included, and a copy of said order shall be filed with the county clerk and recorder in the county wherein said lands are situated. The order of the district court shall be final and conclusive, the same as the order originally creating the district, unless appealed from to the supreme court within 10 days from the entry of the order. The extension of such boundaries shall not deprive the lands already in said district of an adequate supply of water for irrigation purposes.
§ 85-7-1810, MCA