; (iii) take into account regional impacts of hazards such as— (I) river basins; (II) river corridors; (III) micro and macro watersheds; and (IV) estuaries, bays, and coastal regions; and (iv) involve the resilience of major economic sectors and critical national infrastructure such as ports, power and water production and distribution centers, bridges, and waterways essential to interstate commerce. (4) Further revolving fund requirements A participating entity that exercises the authority under paragraph (3)(A) in a fiscal year shall provide matching funds from non-Federal sources in an amount that is equal to 10 percent of the amount that the participating entity receives under paragraph (3)(A) in that fiscal year for purposes described in the respective intended use plan. (5) Reservation of funds The Administrator shall reserve not more than 1.5 percent of the amount made available to carry out this section in a fiscal year— (A) for administrative costs incurred by FEMA in carrying out this section