Mont. Code Ann. § 77-1-404

All field books, plats, maps, and records of the department shall show the class to which each tract therein belongs and whether it belongs to the public schools of the state or to a state institution or other entity according to the grant or instrument by which title to the land has passed to the state. They shall also show whether or not the coal or other minerals in the land are reserved by the United States and shall contain any other information the department considers necessary.