; and (2) the demonstrated need for additional resources to effectively reduce community violence in the applicant’s community. (i) Matching funds required (1) In general Except as provided in paragraphs (2) and (3), the Federal share of each grant awarded under this section shall be 90 percent of the eligible costs incurred by the grant recipient. (2) Exemption from requirement Paragraph (1) shall not apply to a grant awarded to a community-based organization described in subsection (b)(1). (3) Waiver The Federal share of a grant awarded to a unit of local government (that is an eligible entity under subsection (b)(2)) may be up to 100 percent if the Secretary determines there is good cause to waive the Federal share requirement under paragraph (1) of this subsection. (j) Reports Not later than 1 year after the date on which the first 4-year grant period under this section ends, the Secretary shall publish a report identifying best practices for grantees under this section to implement community-based violence intervention initiatives. (k) Rewarding success (1) In general The Secretary may reserve not more than 10 percent of the funds appropriated for a fiscal year to carry out this title for supplemental incentive funds to be distributed to grantees outside the competitive grant process in accordance with paragraph (2). (2) Distribution of additional funds The Secretary may distribute amounts reserved under paragraph (1), in the discretion of the Secretary, to grantees under subsection (a) that have— (A) implemented the grant for not less than 2 years; (B) demonstrated exceptional commitment and progress toward implementing the grantee’s community violence reduction initiative