available until September 30, 2022, to prevent, prepare for, and respond to coronavirus: Provided , That amounts made available under this heading in this Act shall be derived from the general fund, of which not less than $1,000,000 shall be for the Administrator to seek to enter into an agreement not later than 45 days after the date of enactment of this Act with a research organization established under chapter 1503 of title 36, United States Code, to conduct a study to determine whether the environmental controls systems in commercial airliners recirculate pathogens in the cabin air and to assess existing and potential technological solutions to reduce pathogen recirculation and to mitigate any elevated risk of exposure to pathogens in the cabin air: Provided further That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Federal Highway Administration Highway infrastructure programs For an additional amount for Highway Infrastructure Programs , $15,000,000,000, to remain available until expended: Provided , That the funds made available under this heading shall be derived from the general fund, shall be in addition to any funds provided for fiscal year 2020 in this or any other Act for Federal-aid Highways under chapters 1 or 2 of title 23, United States Code, and shall not affect the distribution or amount of funds provided in any other Act: Provided further , That notwithstanding chapter 1 of title 23, United States Code, or any other provision of law, a State, territory, Puerto Rico, or Indian Tribe may use funds made available under this heading in this Act for activities eligible under section 133(b) of title 23, United States Code, for administrative and operations expenses, including salaries of employees (including those employees who have been placed on administrative leave) or contractors, information technology needs, and availability payments: Provided further , That