Section 1. Short title
This Act may be cited as the Gateway Arch National Park Boundary Revision Act of 2026.
Section 2. Boundary revision
Section 4(a) of the Act of May 17, 1954 (16 U.S.C. 450jj–3(a); 68 Stat. 99) is amended—
(1) by striking one hundred acres and inserting 102.18 acres; and
(2) by striking map entitled and all that follows through January 1992 and inserting map titled Gateway Arch National Park Proposed Boundary Revision, numbered 366/189,627, dated August 2023.