Mont. Code Ann. § 39-31-201

Public employees shall have and shall be protected in the exercise of the right of self-organization, to form, join, or assist any labor organization, to bargain collectively through representatives of their own choosing on questions of wages, hours, fringe benefits, and other conditions of employment, and to engage in other concerted activities for the purpose of collective bargaining or other mutual aid or protection free from interference, restraint, or coercion.