Mont. Code Ann. § 61-4-405

Any person who shall violate any of the provisions of this part and any employee, agent, or officer of any such person who shall participate in any manner in making, enforcing, or performing or in aiding or abetting in the performance of any such contract, condition, agreement, or understanding shall be deemed guilty of a crime and upon conviction thereof shall be punished for each offense by a fine of not more than $5,000 or by imprisonment in the penitentiary for not more than 5 years or in the county jail for not more than 1 year or by both such fine and imprisonment.