be appointed to fill vacancies in the commission in accordance with paragraph (3). (3) Vacancy If a vacancy occurs in the commission with respect to a member who was appointed from one of the categories referred to in paragraph (1), the nonpartisan agency shall fill the vacancy by appointing, on a random basis, one of the 2 alternates from such category who was designated under paragraph (2). At the time the agency appoints an alternate to fill a vacancy under the previous sentence, the agency shall designate, on a random basis, another individual from the same category to serve as an alternate member, in accordance with paragraph (2). (b) Procedures for Conducting Commission Business (1) Chair Members of an independent redistricting commission established under this section shall select by majority vote one member who was appointed from the independent category of the approved selection pool described in section 3202(b)(1)(C) to serve as chair of the commission. The commission may not take any action to develop a redistricting plan for the State under section 203 until the appointment of the commission’s chair. (2) Requiring majority approval for actions The independent redistricting commission of a State may not publish and disseminate any draft or final redistricting plan, or take any other action, without the approval of at least— (A) a majority of the whole membership of the commission