The National Park Service (NPS) website consists of thousands of individual pages. Two of the most helpful areas of NPS.gov are the published Laws Relating to the National Park Service; and the administrative histories of many parks, units, monuments, and other NPS-manages sites.
From the National Park Service (NPS) homepage, try clicking Find a Park > by name > Management > Laws & Policies > Enabling Legislation [if available].
A convenient list of Yosemite's enabling legislation beginning in 1864 and running through 2013 can be found here. Uncovering the legislative histories of other parks and NPS units can be a bit more challenging. Explore the other boxes on this guide for more tips on how to find the enabling legislation for other parks.
Legislative Insight is a Federal history service that includes compilations of full text publications created by Congress during the process leading up to the enactment of U.S. Public Laws. Documents may include: bills, reports, hearings, CRS reports, committee prints, Presidential Signing Statements, and Statutes. For documents that are not part of a legislative history, please use ProQuest Congressional.
West Law Campus Research provides online access to legal, news, and business-related research for students, faculty, and library staff.