; or (B) the requirement reduces aviation safety or security. (3) Small airports This subsection shall not apply to nonhub airports or nonprimary airports receiving funds under subsection (c). (e) Relief to airport concessions An airport sponsor must use at least 2 percent of any funds received under subsection (a) to provide financial relief to airport concessionaires experiencing economic hardship (in terms of rent, minimum annual guarantees, lease obligations, or other fees). With respect to funds under this subsection, airport sponsors must show good faith efforts to provide relief to small business concerns owned and controlled by socially and economically disadvantaged businesses, as such term is defined under section 47113 of title 49, United States Code. (f) Cost share The Federal share payable of the costs for which a grant is made under this section or under the Consolidated Appropriations Act, 2020 ( Public Law 116–94 ) shall be 100 percent. (g) Quality assurance The Secretary shall institute adequate policies, procedures and internal controls to prevent waste, fraud, abuse and program mismanagement for the distribution of funds under this section. (h) Availability Sums authorized to be appropriated under this sections shall remain available for 3 fiscal years. (i) Limitations The funds made available under this section shall not be subject to any limitation on obligations set forth in an appropriations Act as applied to the heading Grants-in-Aid for Airports . (j) Administrative costs The Secretary may retain up to 0.1 percent of the funds provided under this section to fund the award and oversight of grants made under this heading. (k) Definitions In this section: (1) Airport concession the term airport concession means a business, other than air carrier, located on an airport that is engaged in the sale of consumer goods or services to the public under an agreement with an airport, another concessionaire, or the owner or lessee of a terminal. (2) Airport; general aviation airport; nonhub airport