Commission employees shall retain the right to: form, join, or assist any employee organization; bargain collectively through the representative that they have chosen; engage in other lawful concerted activities for the purpose of collective bargaining; and refrain from any activity covered under this paragraph. An employee may only present a grievance arising under a collective bargaining agreement to the Commission through the employee organization certified as the exclusive representative for the bargaining unit. An employee who is a member of a bargaining unit with an exclusive representative may discuss any matter with the General Manager of the Commission or the General Manager’s designee. The Commission may not alter any terms or conditions of employment that are subject to collective bargaining under § 18–207 of this subtitle without following the process for collective bargaining under this subtitle.