No.
You are thinking of the chair of the review panel. The chairman of the CTA assigns members to panels. He is both a member and chief executive officer. If he chooses to sit on a panel, he will hear the case and confirm the decision issued by the other, or other two members of the panel.
Normally, two members are required for quorum; however, when a case is controversial, there are usually three members to ensure that there is always a majority decision.