and shall remain available until expended: Provided further , That the sum herein appropriated from the general fund shall be reduced as such offsetting collections are received during fiscal year 2019, so as to result in a final fiscal year 2019 appropriation from the general fund estimated at $28,977,000. Salaries and expenses, united states attorneys For necessary expenses of the Offices of the United States Attorneys, including inter-governmental and cooperative agreements, $2,250,000,000: Provided , That of the total amount appropriated, not to exceed $7,200 shall be available for official reception and representation expenses: Provided further , That not to exceed $25,000,000 shall remain available until expended: Provided further , That each United States Attorney shall establish or participate in a task force on human trafficking. United states trustee system fund For necessary expenses of the United States Trustee Program, as authorized, $230,000,000, to remain available until expended: Provided , That, notwithstanding any other provision of law, deposits to the United States Trustee System Fund and amounts herein appropriated shall be available in such amounts as may be necessary to pay refunds due depositors: Provided further , That, notwithstanding any other provision of law, fees deposited into the Fund pursuant to section 589a(b) of title 28, United States Code (as limited by section 1004(b) of the Bankruptcy Judgeship Act of 2017 (division B of Public Law 115–72 )), shall be retained and used for necessary expenses in this appropriation and shall remain available until expended: Provided further , That to the extent that fees deposited into the Fund in fiscal year 2019, net of amounts necessary to pay refunds due depositors, exceed $230,000,000, those excess amounts shall be available in future fiscal years only to the extent provided in advance in appropriations Acts: Provided further , That the sum herein appropriated from the general fund shall be reduced (1) as such fees are received during