The committee sits in plenary session under the chairmanship of its president or, in the event of absence or impediment, by the president of the chamber with the most seniority in office. It also comprises:
1° The chamber presidents, replaced in the event of absence or impediment by a magistrate from the same chamber appointed by the president of that chamber;
2° The magistrate acting as rapporteur;
3° If necessary to enable the commission to sit in an uneven number, a tie-breaking magistrate appointed by the president of the commission.