; and (ii) the number of members of the Commission shall be reduced by the number of appointments not made by that date. (4) Chair; vice chair (A) Chair The chairs of the appropriate congressional committees shall jointly designate one member of the Commission to serve as chair of the Commission. (B) Vice chair The ranking minority members of the appropriate congressional committees shall jointly designate one member of the Commission to serve as vice chair of the Commission. (5) Meetings (A) Initial meeting The Commission shall hold the first meeting as soon as practicable after 2/3 of the members of the Commission have been appointed under paragraph (1). (B) Subsequent meetings After its initial meeting, the Commission shall meet upon the call of the chair or a majority of its members. (6) Quorum Eight members of the Commission shall constitute a quorum for purposes of conducting business. (7) Period of appointment