expended: Provided further, That the Secretary of Commerce is authorized to retain and use as offsetting collections all funds transferred, or previously transferred, from other Government agencies for all costs incurred in telecommunications research, engineering, and related activities by the Institute for Telecommunication Sciences of NTIA, in furtherance of its assigned functions under this paragraph, and such funds received from other Government agencies shall remain available until expended. PUBLIC TELECOMMUNICATIONS FACILITIES, PLANNING AND CONSTRUCTION For the administration of prior-year grants, recoveries and unobligated balances of funds previously appropriated are available for the administration of all open grants until their expiration. FACILITIES MANAGEMENT AND CONSTRUCTION For necessary expenses for the design, construction, alteration, improvement, maintenance, and repair of buildings and facilities managed by the National Telecommunications and Information Administration, not otherwise provided for, $2,000,000, to remain available until expended. United states patent and trademark office SALARIES AND EXPENSES (INCLUDING TRANSFERS OF FUNDS) For necessary expenses of the United States Patent and Trademark Office (USPTO) provided for by law, including defense of suits instituted against the Under Secretary of Commerce for Intellectual Property and Director of the USPTO, $4,195,799,000, to remain available until expended: Provided, That the sum herein appropriated from the general fund shall be reduced as offsetting collections of fees and surcharges assessed and collected by the USPTO under any law are received during fiscal year 2024, so as to result in a fiscal year 2024 appropriation from the general fund estimated at $0: Provided further, That during fiscal year 2024, should the total amount of such offsetting collections be less than $4,195,799,000, this amount shall be reduced accordingly: Provided further, That any amount received in excess of $4,195,799,000 in fiscal year 2024 and