of title 49, United States Code, shall include any holding company of a Class II railroad or Class III railroad (as those terms are defined in section 20102 of title 49, United States Code): Provided further, That section 22907(e)(1)(A) of title 49, United States Code, shall not apply to amounts made available under this heading in this Act: Provided further, That section 22907(e)(1)(A) of title 49, United States Code, shall not apply to amounts made available under this heading in previous fiscal years if such funds are announced in a notice of funding opportunity that includes funds made available under this heading in this Act: Provided further, That the preceding proviso shall not apply to funds made available under this heading in the Infrastructure Investment and Jobs Act (division J of Public Law 117–58 ): Provided further, That unobligated balances remaining after 6 years from the date of enactment of this Act may be used for any eligible project under section 22907(c) of title 49, United States Code: Provided further, That the Secretary may withhold up to 2 percent of the amounts made available under this heading in this Act for the costs of award and project management oversight of grants carried out under title 49, United States Code. 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 22101(a) of the Infrastructure Investment and Jobs Act ( Public Law 117–58 ), $1,141,442,000, to remain available until expended: Provided, That the Secretary may retain up to one-half of 1 percent of the amounts made available under both this heading in this Act and the National Network Grants to the National Railroad Passenger Corporation heading in this Act to fund the costs of project management and oversight of activities authorized by section 22101(c) of the Infrastructure Investment and Jobs Act ( Public Law