expenses of U.S. Citizenship and Immigration Services for procurement, construction, and improvements of the E-Verify Program, $22,838,000, to remain available until September 30, 2021. Federal law enforcement training centers Operations and support For necessary expenses of the Federal Law Enforcement Training Centers for operations and support, including the purchase of not to exceed 117 vehicles for police-type use and hire of passenger motor vehicles, and services as authorized by section 3109 of title 5, United States Code, $254,774,000, of which $58,191,000 shall remain available until September 30, 2020: Provided , That not to exceed $7,180 shall be for official reception and representation expenses. Science and technology directorate Operations and support For necessary expenses of the Science and Technology Directorate for operations and support, including the purchase or lease of not to exceed 5 vehicles, $304,408,000, of which $166,350,000 shall remain available until September 30, 2020: Provided , That not to exceed $10,000 shall be for official reception and representation expenses. Research and development For necessary expenses of the Science and Technology Directorate for research and development, $497,751,000, to remain available until September 30, 2020. Countering weapons of mass destruction office Operations and support For necessary expenses of the Countering Weapons of Mass Destruction Office for operations and support, $214,264,0000: Provided , That not to exceed $2,250 shall be for official reception and representation expenses. Procurement, construction, and improvements For necessary expenses of the Countering Weapons of Mass Destruction Office for procurement, construction, and improvements, $74,896,000, to remain available until September 30, 2021. Research and development For necessary expenses of the Countering Weapons of Mass Destruction Office for research and development, $80,443,000, to remain available until September 30, 2021. Federal assistance For necessary expenses of the