(a)
Establishment of fund— There is established a fund, to be known as the “Border Wall and Security Trust Fund”, consisting of such amounts as may be appropriated pursuant to subsection (b) to construct a wall (including physical barriers and associated detection technology, roads, and lighting) along the international border between the United States and Mexico by January 19, 2021.
(b)
Appropriation of amounts— There is hereby appropriated to the Border Wall and Security Trust Fund established under subsection (a), out of any money in the Treasury not otherwise appropriated, such sums as the Secretary of Homeland Security may request of the Secretary of Treasury on or after October 1, 2018, up to a total of $25,000,000,000, to remain available until expended to carry out the purpose described in subsection (a).
(c)
Sunset— The authority provided by this Act shall terminate on September 30, 2028, and the unobligated balance of any amounts in the Border Wall and Security Trust Fund on such date shall be returned to the general fund of the Treasury.