to the appropriate agencies to be administered in accordance with chapter 53 of title 49, United States Code: Provided further , That unobligated balances remaining after four years from the date of enactment may be used for any eligible project under section 24407(c) of title 49, United States Code: Provided further , That the Secretary shall issue a single Notice of Funding Opprtunity for funding provided under this heading not later than 60 days after enactment of this Act: Provided further , That the Secretary may withhold up to one percent of the amount provided under this heading for the costs of award and project management oversight of grants carried out under section 24407 of title 49, United States Code. Magnetic levitation technology deployment program For necessary expenses related to the deployment magnetic levitation transportation projects, consistent with language in 1307(a) through (c) of Public Law 109–59 , as amended by section 102 of Public Law 110–244 (section 322 of title 23, United States Code), $150,000,000, to remain available until expended. Northeast corridor grants to the national railroad passenger corporation To enable the Secretary of Transportation to make 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 ), $650,000,000, to remain available until expended: Provided , That the Secretary may retain up to one-half of 1 percent of the funds provided under both this heading and the National Network Grants to the National Railroad Passenger Corporation heading to fund the costs of project management and oversight of activities authorized by section 11101(c) of division A of Public Law 114–94 : Provided further , That in addition to the project management oversight funds authorized under section 11101(c) of division A of Public Law 114–94 , the Secretary may retain up to an additional $5,000,000 of the funds