49, United States Code, and shall be in addition to any other appropriations for such purpose: 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. Saint Lawrence Seaway Development Corporation Operations and maintenance (Harbor maintenance trust fund) For necessary expenses to conduct the operations, maintenance, and capital infrastructure activities of the Seaway International Bridge, $1,500,000, to be derived from the Harbor Maintenance Trust Fund pursuant to section 210 of the Water Resources Development Act of 1986 ( 33 U.S.C. 2238 ), to prevent, prepare for, and respond to coronavirus: Provided , 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. Office of Inspector General Salaries and expenses For an additional amount for Office of Inspector General , $5,000,000, to remain available until expended, to prevent, prepare for, and respond to coronavirus: Provided , That the funding made available under this heading in this Act shall be used for conducting audits and investigations of projects and activities carried out by the Department of Transportation to prevent, prepare for, and respond to coronavirus: 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. Department of Housing and Urban Development Public and indian housing Tenant-based rental assistance (including transfer of funds) For an additional amount for Tenant-Based Rental Assistance , $4,000,000,000, to remain available until expended, and to be used under the same authority and conditions as the additional appropriations for fiscal year 2020 under this heading in title XII of division B of the CARES Act (