(a) A member of the governing body of a commission or a person who provides legal services to a commission may not:
(1) provide legal representation before or to the commission on behalf of a governmental unit located, in whole or in part, within the boundaries of the commission; or
(2) be a shareholder, partner, or employee of a law firm that provides those legal services to the governmental unit.
(b) A person who violates Subsection (a) may not receive compensation or reimbursement for expenses from the commission or governmental unit.