The Transit Advisory Commission shall consist of seven (7) members, three of whom shall be citizens of the community not employed by or holding office with the City of Quincy, three of whom shall be employees or officers of the City of Quincy, IL; and one person appointed by the Mayor with advice and consent of the City Council, for an initial term of three (3) years whose primary duty will be to represent the citizens with disabilities. The three members, who are officers or employees of the city, shall be designated from time to time by the Mayor for indefinite terms. The three members, who are not employees or officers of the city, shall be appointed by the Mayor with the advice and consent of the Council. Terms are for three (3) years. The Mayor shall be an ex-officio member of the Commission.