No provision of this Act shall be construed to require the assignment or transportation of students or teachers in order to overcome racial imbalance.

A parent or guardian of a child, or parents or guardians of children similarly situated, transported to a public school in accordance with a court order, may seek to reopen or intervene in the further implementation of such court order, currently in effect, if the time or distance of travel is so great as to risk the health of the student or significantly impinge on his or her educational process.

The rules of evidence required to prove that State or local authorities are practicing racial discrimination in assigning students to public schools shall be uniform throughout the United States.

The proviso of section 407(a) of the Civil Rights Act of 1964 [42 U.S.C. 2000c–6(a)] providing in substance that no court or official of the United States shall be empowered to issue any order seeking to achieve a racial balance in any school by requiring the transportation of pupils or students from one school to another or one school district to another in order to achieve such racial balance, or otherwise enlarge the existing power of the court to insure compliance with constitutional standards shall apply to all public school pupils and to every public school system, public school and public school board, as defined by title IV [42 U.S.C. 2000c et seq.], under all circumstances and conditions and at all times in every State, district, territory, Commonwealth, or possession of the United States regardless of whether the residence of such public school pupils or the principal offices of such public school system, public school or public school board is situated in the northern, eastern, western, or southern part of the United States.