Limit on congressional redistricting after an apportionment

2 U.S.C. 2c is amended by adding at the end the following: A State which has been redistricted in the manner provided by law after an apportionment 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), may not be redistricted again until after the next apportionment of Representatives under such section, unless: (a) a court requires the State to conduct such subsequent redistricting to comply with the Constitution or to enforce the Voting Rights Act of 1965 (42 U.S.C. 5 1973 et seq.). (b) a court conducts such subsequent redistricting to comply with the Constitution or to enforce the Voting Rights Act of 1965 (42 U.S.C. 5 1973 et seq.), in which case a State, through its legislature or a state-mandated redistricting commission approved through a State constitution, shall have an opportunity following a court-constructed apportionment to conduct alternate subsequent redistricting to comply with the Constitution or to enforce the Voting Rights Act of 1965 (42 U.S.C. 5 1973 et seq.). (c) a State orders a statewide referendum to conduct such subsequent redistricting to comply with the Constitution or to enforce the Voting Rights Act of 1965 (42 U.S.C. 5 1973 et seq.)..