(a) To be eligible for appointment to a subregional board, a person must reside in the municipality making the appointment.
(b) An elected officer of the state or a political subdivision of this state who is not prohibited by the Texas Constitution from serving on the board is eligible, as an additional duty of office, to serve on the board. An elected officer who is a board member is not entitled to receive compensation for serving as a member but is entitled to reimbursement for reasonable expenses incurred in performing duties as a member.

(c) The principal municipality shall make its appointments to the board so that at least one of the appointees is designated to represent the interests of the transportation disadvantaged.