; (C) in each of the seventh and eighth years of participation in the program, an amount equal to 75 percent of the amount such entity received under subsection (a) with respect to such year; and (D) in the ninth year and each subsequent year thereafter of participation in the program, an amount equal to 100 percent of the amount such entity received under subsection (a) with respect to such year. (2) Exception for indian tribes The Secretary may modify or waive the matching fund requirements under paragraph (1) in the case of an eligible entity that is an Indian tribe. (3) Reallotment If an eligible entity returns to the Secretary any portion of the grant amount provided to such eligible entity under this subpart for any fiscal year, or requests a grant amount that is less than the Federal share determined for such entity in accordance with subsection (a), the Secretary shall reallot such excess amount for the succeeding fiscal year, in addition to the amounts appropriated under 499O for such succeeding fiscal year. (c) Supplement, not supplant Grant funds awarded under this subpart shall be used to supplement, and not supplant, other Federal, State, tribal, and local funds that would otherwise be expended to carry out activities assisted under this subpart. 499K. Applications (a) In general To be eligible to participate in the program under this subpart, an eligible entity shall submit an application to the Secretary at such time, in such manner, and containing such information as the Secretary may require, including— (1) a plan that includes— (A) the amount of funds requested by the eligible entity under this subpart and the intended use of such funds; (B) how the eligible entity will use the requested funds to implement promising and evidence-based institutional reforms and innovative practices to improve student outcomes, including— (i) implementation of the reforms and practices identified by such entity under section 499C(b)(3)