Mont. Code Ann. § 82-15-207

In addition to the penalty above prescribed, any customer of such person, firm, company, association, or corporation may bring a civil action in any county in which such offending person, firm, company, association, or corporation may be doing business and recover therein not only actual damages for violation of this part but also exemplary damages for such reasonable sum as the jury may deem proper punishment for the unlawful practice of discrimination as herein defined.