of the SAFETEA-LU Technical Corrections Act of 2008 ( Public Law 110–244 ) ( 23 U.S.C. 322 note): Provided, That the Secretary may withhold up to 2 percent of the amounts made available under this heading in this title for the costs of award and project management and oversight, to remain available until September 30, 2023: 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. Northeast corridor grants to the national railroad passenger corporation (including transfer of funds) For an additional amount for Northeast Corridor Grants to the National Railroad Passenger Corporation , $5,000,000,000, to remain available until September 30, 2022, to enable the Secretary to make or amend existing grants to the National Railroad Passenger Corporation for activities associated with the Northeast Corridor as authorized by section 11101(a) of the Fixing America’s Surface Transportation Act (division A of Public Law 114–94 ): Provided, That such additional amount shall be subject to the provisions under this heading in title I of this Act, except as modified by this heading in this title: Provided further, That the Secretary shall make or amend such grants not later than 90 days after the date of enactment of this Act: Provided further, That of the amounts made available under this heading in this title, priority shall be given to projects for the repair, rehabilitation, or upgrade of railroad assets or infrastructure, for capital projects that expand passenger rail capacity, and for the rehabilitation or acquisition of rolling stock: Provided further, That the amounts made available under this heading in this title may be used to subsidize the operating losses of the National Railroad Passenger Corporation: Provided further, That of the amounts made available under this heading in this title, not less than $172,000,000 shall be made available for use of the National Railroad