The common law doctrine of incompatibility does not disqualify an official or employee of a public entity from serving as a director. Notwithstanding any other law, a director may participate in all votes and decisions pertaining to the business of the authority except that a director who is also an officer or employee of a public entity may not participate in the discussion of or vote on a matter regarding a contract with that public entity.
Tex. Spec. Dist. Loc. Laws § 8815.053