; (B) redress of violations of the law and, provide representation in dispute resolution; and (C) systemic change in educational setting to address violations; and (3) pursue administrative, legal, and other appropriate remedies to ensure that children, youth, and adults with disabilities are receiving the educational services and rights to which they are entitled under the Individuals with Disabilities Education Act ( 20 U.S.C. 1400 et seq.), section 504 of the Rehabilitation Act of 1973 ( 29 U.S.C. 794 et seq.), and the Americans with Disabilities Act of 1990 ( 42 U.S.C. 12101 et seq.). (d) System requirements To be eligible for a grant under this section, a protection and advocacy system shall— (1) have the authority to investigate incidents of abuse and neglect of youth, children, and adults with disabilities in educational settings if the incidents are reported to the protection and advocacy system or if there is probable cause to believe that the incidents occurred; (2) have the authority to pursue legal, administrative, and other appropriate remedies or approaches to ensure the protection of, and advocacy for, the rights of children, youth, and adults who are eligible or who may be eligible for assistance under the Individuals with Disabilities Education Act ( 20 U.S.C. 1400 et seq.), the Americans with Disabilities Act of 1990 ( 42 U.S.C. 12101 et seq.), or section 504 of the Rehabilitation Act of 1973 ( 29 U.S.C. 794 )