in the commission with respect to a member who was appointed by the nonpartisan agency under subparagraph (A) of paragraph (1) from one of the categories referred to in such subparagraph, the agency shall fill the vacancy by appointing, on a random basis, one of the 2 alternates from such category who was designated under subparagraph (A) of paragraph (3). 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 subparagraph (A) of paragraph (3). (B) Members appointed by first members If a vacancy occurs in the commission with respect to a member who was appointed by the first members of the commission under subparagraph (B) of paragraph (1) from one of the categories referred to in such subparagraph, the first members shall, in accordance with the special rules described in paragraph (2), fill the vacancy by appointing one of the 2 alternates from such category who was designated under subparagraph (B) of paragraph (3). At the time the first members appoint an alternate to fill a vacancy under the previous sentence, the first members shall, in accordance with the special rules described in paragraph (2), designate another individual from the same category to serve as an alternate member, in accordance with subparagraph (B) of paragraph (3). (5) Removal A member of the independent redistricting commission may be removed by a majority vote of the remaining members of the commission if it is shown by a preponderance of the evidence that the member is not eligible to serve on the commission under section 202(a). (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 202(b)(1)(C) to serve as chair of the commission. The