Mont. Code Ann. § 15-59-121
Penalty for violations
15-59-121 . Penalty for violations. Any violation of the provisions of 15-59-101 , 15-59-102 , 15-59-104 through 15-59-106 , 15-59-110 , 15-59-112 , or 15-59-113 shall be deemed a misdemeanor and shall be punished by a fine not exceeding $500 or by imprisonment in the county jail not exceeding 6 months or by both such fine and imprisonment.