on a host railroad’s line and a positive train control system is not required by law or regulation: 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 transit administration Capital investment grants For an additional amount for Capital Investment Grants , as authorized under section 5309 of title 49, United States Code, and section 3005(b) of the Fixing America’s Surface Transportation Act, $5,000,000,000, to remain available until expended: Provided, That of the amounts made available under this heading in this title, not less than $3,000,000,000 shall be available for projects authorized under section 5309(d) of title 49, United States Code, not less than $1,000,000,000 shall be available for projects authorized under section 5309(e) of such title, and not less than $500,000,000 shall be available for projects authorized under section 5309(h) of such title: Provided further, That in selecting projects to be funded with amounts made available under sections 5309(d) of title 49, United States Code, priority shall be given to projects that are currently in construction or that are able to obligate funds not later than 270 days after the date of enactment of this Act: Provided further, That funds made available under this heading in this or any other Act may be available for amendments to current full-funding grant agreements that require additional Federal funding as a result of coronavirus: Provided further, That the Secretary shall not waive the requirements of section 5333 of title 49, United States Code, for funds appropriated under this heading in this Act: Provided further, That unless otherwise specified, applicable requirements under chapter 53 of title 49, United States Code, shall apply to funding made available under this heading in this title: Provided further, That up to one-half of 1 percent of the funds provided under this heading in this