; and (B) an equal number of members (but not fewer than one) from each of the following categories: (i) Members appointed by a member of the upper house of the State legislature who represents the political party with the greatest number of seats in that house. (ii) Members appointed by a member of the upper house of the State legislature who represents the political party with the second greatest number of seats in that house. (iii) Members appointed by a member of the lower house of the State legislature who represents the political party with the greatest number of seats in that house. (iv) Members appointed by a member of the lower house of the State legislature who represents the political party with the second greatest number of seats in that house. (2) Special rule for States with unicameral legislature In the case of a State with a unicameral legislature, the independent redistricting commission established under this subsection shall be composed of— (A) a chair, who shall be appointed by majority vote of the other members of the commission