as described in paragraph (2) under this heading in this Act: Provided further , That the FAA may redistribute funds under the previous proviso on more than one occasion: Provided further , That any airport that had been allocated more than four times annual operating expenses under this heading in title XII of division B of the CARES Act ( Public Law 116–136 ) shall not be eligible for funds allocated or redistributed under this Act: Provided further , That the Administrator of the FAA may retain up to 0.1 percent of the funds provided under this heading in this Act to fund the award and oversight by the Administrator of grants made under this heading in this Act: Provided further , That obligations of funds under this heading in this Act shall not be subject to any limitations on obligations provided in any Act making appropriations: Provided further , That all airport sponsors receiving funds under this heading in this Act shall continue to employ, through September 30, 2021, at least 90 percent of the number of individuals employed (after making adjustments for retirements or voluntary employee separations) by each airport as of March 27, 2020: Provided further , That the Secretary may waive the workforce retention requirement in the previous proviso, if the Secretary determines the airport is experiencing economic hardship as a direct result of the requirement, or the requirement reduces aviation safety or security: Provided further , That the workforce retention requirement shall not apply to nonhub airports or nonprimary airports receiving funds under this heading in this Act: Provided further , That amounts repurposed by the provisions under this heading in this Act that were previously designated by the Congress as an emergency requirement pursuant to the Balanced Budget and Emergency Deficit Control Act of 1985 are designated by the Congress as an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985: Provided further , That such