This Act may be cited as the Gateway Arch National Park Boundary Revision Act of 2026.

Section 4(a) of the Act of May 17, 1954 (16 U.S.C. 450jU.S. Code — Title 16, Section 450jView official source on GovInfoj–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.