Mont. Code Ann. § 41-2-118
Penalties
41-2-118 . Penalties. An employer who violates any of the provisions of this part is guilty of a misdemeanor and is punishable as provided in 46-18-212 . Each day during which a violation of this part continues constitutes a separate offense, and the employment of a minor in violation of this part constitutes, with respect to each minor employed, a separate offense.