That the sum appropriated under this heading from the general fund shall be reduced on a dollar-for-dollar basis as such offsetting collections are received during fiscal year 2024 so as to result in a final fiscal year appropriation from the general fund estimated at not more than $6,744,968,000. PROCUREMENT, CONSTRUCTION, AND IMPROVEMENTS For necessary expenses of the Transportation Security Administration for procurement, construction, and improvements, $40,678,000, to remain available until September 30, 2026. RESEARCH AND DEVELOPMENT For necessary expenses of the Transportation Security Administration for research and development, $14,641,000, to remain available until September 30, 2025. Coast guard OPERATIONS AND SUPPORT For necessary expenses of the Coast Guard for operations and support including the Coast Guard Reserve