From the document: "Like other federal agencies, the National Park Service (NPS) has halted most operations during occasional government shutdowns resulting from lapses in appropriations. In the past three decades, such shutdowns occurred in 1995/1996, 2013, early 2018, late 2018/early 2019, and most recently from October 1, 2025, to November 12, 2025. Although government shutdowns have affected many agencies and programs, public and congressional attention has focused particularly on certain impacts, one of which is the effect of a shutdown on the National Park System. Agency actions during a shutdown are governed by the Antideficiency Act (31 U.S.C. §§1341-1342, §§1511-1519) and related guidance, including Circular No. A-11 [hyperlink] from the Office of Management and Budget (OMB). One OMB requirement is for agency heads to develop and maintain shutdown plans, known as 'contingency plans', detailing how each agency is to prepare for and operate during a funding gap. NPS has updated its shutdown contingency plan several times in the past decade."