of the Infrastructure Investment and Jobs Act ( Public Law 117–58 ), the Secretary may retain up to an additional $5,000,000 of the amounts made available under this heading in this Act to fund expenses associated with the Northeast Corridor Commission established under section 24905 of title 49, United States Code. NATIONAL NETWORK 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 National Network as authorized by section 22101(b) of the Infrastructure Investment and Jobs Act (division B of Public Law 117–58 ), $1,313,033,000, to remain available until expended: Provided, That the Secretary may retain up to an additional $3,000,000 of the funds provided under this heading in this Act to fund expenses associated with the State-Supported Route Committee established under section 24712 of title 49, United States Code: Provided further, That none of the funds provided under this heading in this Act shall be used by Amtrak to give notice under subsection (a) or (c) of section 24706 of title 49, United States Code, with respect to long-distance routes (as defined in section 24102 of title 49, United States Code) on which Amtrak is the sole operator on a host railroad’s line and a positive train control system is not required by law or regulation, or, except in an emergency or during maintenance or construction outages impacting such routes, to otherwise discontinue, reduce the frequency of, suspend, or substantially alter the route of rail service on any portion of such route operated in fiscal year 2018, including implementation of service permitted by section 24305(a)(3)(A) of title 49, United States Code, in lieu of rail service: Provided further, That the National Railroad Passenger Corporation may use up to $66,000,000 of the amounts made available under this heading in this Act for corridor development activities as authorized by section 22101(h) of division B of Public