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 ), any subsequent Congressional redistricting plan enacted by the State prior to the next apportionment of Representatives under such section shall not take effect unless and until— (1) the State commences a civil action in the United States District Court for the District of Columbia for a declaratory judgment that such subsequent plan neither has the purpose nor will have the effect of denying or abridging the right to vote on account of race or color, or in contravention of the guarantees set forth in section 4(f)(2) of the Voting Rights Act of 1965 ( 52 U.S.C. 10303(f)(2) )