; or (2) if a plan developed by such commission is not enacted into law, the redistricting plan developed and enacted into law by a 3-judge court of the United States District Court for the District of Columbia, in accordance with section 301. B Independent Redistricting Commissions 311. Independent redistricting commission (a) Appointment of members (1) In general The nonpartisan agency established or designated by a State under section 314(a) shall establish an independent redistricting commission for the State, which shall consist of 12 members appointed by the agency as follows: (A) The agency shall appoint 4 members on a random basis from the majority category of the approved selection pool (as described in section 312(b)(1)(A)). (B) The agency shall appoint 4 members on a random basis from the minority category of the approved selection pool (as described in section 312(b)(1)(B)). (C) The agency shall appoint 4 members on a random basis from the independent category of the approved selection pool (as described in section 312(b)(1)(C)). (2) Appointment of alternates to serve in case of vacancies At the time the agency appoints the members of the independent redistricting commission under paragraph (1) from each of the categories referred to in such paragraph, the agency shall, on a random basis, designate 2 other individuals from such category to serve as alternate members who may 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