The Commission, upon the affirmative vote of four members of the Commission, shall appoint a City Attorney who shall serve as the chief legal adviser in all city matters. The City Attorney shall represent the city in legal proceedings. The Commission, however, may retain special legal counsel to assist the City Attorney or to handle any matters in which the city has an interest The City Attorney shall report to and be under the supervision of the Commission and perform any other duties prescribed by law, ordinance, resolution or the Manager.