Mont. Code Ann. § 61-3-455
61-3-455 Violation a misdemeanor
61-3-455 . Violation a misdemeanor. A person who violates 61-3-414 , 61-3-458 , or 61-3-460 or who knowingly and wrongfully attempts to secure license plates under 61-3-332 , 61-3-414 , 61-3-458 , or 61-3-460 is guilty of a misdemeanor and shall be punished by a fine of not less than $100 or imprisonment for not more than 30 days, or both.