from being considered qualified elementary or secondary education expenses. (C) No exclusion of qualified expenses due to institution's religious character or affiliation No Federal, State, or local government entity, or officer or employee thereof, shall exclude, discriminate against, or otherwise disadvantage any elementary or secondary education institution with respect to qualified elementary or secondary education expenses at that institution based in whole or in part on the institution’s religious character or affiliation, including religiously based or mission-based policies or practices. (3) Parental rights to use scholarships No Federal, State, or local government entity, or officer or employee thereof, shall disfavor or discourage the use of scholarships granted by participating scholarship granting organizations for qualified elementary or secondary education expenses at private or nonprofit elementary and secondary education institutions, including faith-based schools. (4) Parental right to intervene In any action filed in any State or Federal court which challenges the constitutionality (under the constitution of such State or the Constitution of the United States) of any provision of this Act (or any amendment made by this Act), any parent of an eligible student who has received a scholarship from a scholarship granting organization shall have the right to intervene in support of the constitutionality of such provision or amendment. To avoid duplication of efforts and reduce the burdens placed on the parties to the action, the court in any such action may require interveners taking similar positions to file joint papers or to be represented by a single attorney at oral argument, provided that the court does not require such interveners to join any brief filed on behalf of any State which is a defendant in such action. (b) Definitions For purposes of this section, the terms eligible student , scholarship granting organization , and qualified elementary or secondary education expense shall have the