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, $367,183,000, of which $205,558,000 shall remain available until September 30, 2025: Provided, That not to exceed $10,000 shall be for official reception and representation expenses. PROCUREMENT, CONSTRUCTION, AND IMPROVEMENTS For necessary expenses of the Science and Technology Directorate for procurement, construction, and improvements, $43,579,000, to remain available until September 30, 2028. RESEARCH AND DEVELOPMENT For necessary expenses of the Science and Technology Directorate for research and development, $352,496,000, to remain available until September 30, 2026. Countering weapons of mass destruction office OPERATIONS AND SUPPORT For necessary expenses of the Countering Weapons of Mass Destruction Office for operations and support, $156,946,000, of which $50,446,000 shall remain available until September 30, 2025: 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, $15,360,000, to remain available until September 30, 2026. RESEARCH AND DEVELOPMENT For necessary expenses of the Countering Weapons of Mass Destruction Office for research and development, $48,751,000, to remain available until September 30, 2026. FEDERAL ASSISTANCE For necessary expenses of the Countering Weapons of Mass Destruction Office for Federal assistance through grants, contracts, cooperative agreements, and other activities, $132,764,000, to remain available until September 30, 2026: Provided, That of the amounts made available under this heading, $2,000,000 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