Mont. Code Ann. § 33-30-303

Any individual member of a corporation, subject to the provisions of this chapter, who believes that the member is aggrieved by any act or omission of the corporation or its officers, directors, or employees may file a statement in writing of the grievance in the office of the commissioner, and the commissioner may investigate the grievance. An investigation by the commissioner may not act as a bar to any suit in a court of competent jurisdiction instituted by an aggrieved member or as a bar to any defense by the involved corporation.