A local government with self-government powers may provide any services or perform any functions not expressly prohibited by the Montana constitution, state law, or its charter. These services and functions include but are not limited to those services and functions which general power government units are authorized to provide or perform.
Authorization For Self-Government Services And Functions
Mont. Code Ann. § 7-1-102, under Nature of Self-GoverningLocal Governments and Local Government Prohibitions.
Mont. Code Ann. § 7-1-102