Mont. Code Ann. § 81-8-402
Penalties
81-8-402 . Penalties. Violation of 81-8-401 is a misdemeanor and any person, firm, or corporation, other than one excepted in 81-8-401 (2), violating any of the provisions thereof is, upon conviction, subject to a fine not exceeding the sum of $100 or imprisonment for a period not exceeding 30 days, or both.