; (vi) implementing any technology or measure, or installing any infrastructure, for school safety reinforcement, including bullet-resistant doors and windows; and (vii) implementing any technology or system that would reduce the time needed to disseminate official information to parents regarding the safety of their children during and immediately following a crisis. (D) Restriction on DOJ The Attorney General may not promulgate a rule that restricts a State's ability to determine the eligible uses of subgrant funds awarded under this paragraph. (5) Matching requirements (A) State match Each State that receives a grant under this section shall provide non-Federal matching funds equal to 20 percent of the amount of the grant toward the cost of carrying out the activities described in this section. (B) Eligible entity match (i) In general Each eligible entity that receives a subgrant under this section shall provide matching funds, in cash or through in-kind contributions, from Federal, State, local, or private sources in an amount equal to 5 percent of the amount of the subgrant toward the cost of carrying out the activities described in this section. (ii) Waiver (I) In general A State may waive the matching funds requirement under clause (i), on a case-by-case basis, upon a showing of exceptional circumstances, such as— (aa) the difficulty of raising matching funds for a program to serve a rural area; (bb) the difficulty of raising matching funds in areas with a concentration of local educational agencies or schools with a high percentage of students aged 5 through 17— (AA) who are in poverty, as counted in the most recent census data approved by the Attorney General; (BB) who are eligible for a free or reduced price lunch under the Richard B. Russell National School Lunch Act ( 42 U.S.C. 1751 et seq. ); (CC) whose families receive assistance under the State program funded under part A of title IV of the Social Security Act ( 42 U.S.C. 601 et seq. )