June 18, 1929 ( 2 U.S.C. 2a(a) ), the State shall elect all such Representatives at large. (b) Optional elections at large If a State is entitled to six or seven Representatives in Congress under an apportionment made 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(a) ), the State may, at its option, elect all such Representatives at large. 203. Establishing minimum number of candidates in general election (a) States with partisan nominating primaries (1) In general If, in a primary election for the office of Representative, the candidates that advance to the general election do so by winning the nomination of a political party (without regard to whether or not the election is open or closed to voters on the basis of political party preference), the State shall ensure that the number of candidates to be nominated by each political party is equal to the lesser of— (A) the number of Representatives who will be elected from the district involved