fiscal year 2019 so as to result in a final fiscal year appropriation from the general fund estimated at not more than $4,497,778,000. Procurement, construction, and improvements For necessary expenses of the Transportation Security Administration for procurement, construction, and improvements, $129,789,000, to remain available until September 30, 2021. Research and development For necessary expenses of the Transportation Security Administration for research and development, $20,594,000, to remain available until September 30, 2020. Coast Guard Operations and support For necessary expenses of the Coast Guard, for operations and support, including purchase or lease of not to exceed 25 passenger motor vehicles, which shall be for replacement only