; and (C) the individual certifies that he or she will not run as a candidate for the office of Representative in the Congress until after the next apportionment of Representatives under section 22(a) of the Act entitled An Act to provide for the fifteenth and subsequent decennial censuses and to provide for an apportionment of Representatives in Congress , approved June 18, 1929 ( 2 U.S.C. 2a ). (4) Vacancy A vacancy in the commission shall be filled in the manner in which the original appointment was made. (5) Deadline Each State shall establish a commission under this section, and the members of the commission shall appoint the commission’s chair, not later than the first February 1 which occurs after the chief executive of a State receives the State apportionment notice. (6) Appointment of chair required prior to development of redistricting plan The commission may not take any action to develop a redistricting plan for the State under subsection (b) until the appointment of the commission’s chair in accordance with paragraph (1)(E). (7) Requiring all meetings to be open to public The commission shall hold each of its meetings in public. (8) Internet site As soon as practicable after establishing the commission, the State shall establish and maintain a public Internet site for the commission which meets the following requirements: (A) The site is updated continuously to provide advance notice of commission meetings and to otherwise provide timely information on the activities of the commission. (B) The site contains the most recent available information from the Bureau of the Census on voting-age population, voter registration, and voting in the State, including precinct-level and census tract-level data with respect to such information, as well as detailed maps reflecting such information. (C) The site includes interactive software to enable any individual to design a redistricting plan for the State on the basis of the information described in subparagraph (B), in accordance with the criteria described in