(a) This chapter does not require the commissioners court of a county to conduct an open meeting:
(1) to deliberate the appointment, employment, evaluation, reassignment, duties, discipline, or dismissal of a member of an advisory body; or
(2) to hear a complaint or charge against a member of an advisory body.
(b) Subsection (a) does not apply if the individual who is the subject of the deliberation or hearing requests a public hearing.