Marsh-Billings-Rockefeller National Historical Park Establishment Act Amendments Act of 2025

S 416 amends the Marsh-Billings-Rockefeller National Historical Park Act to expand the park’s boundaries, incorporating specific areas like the historic mansion complex, Billings Farm and Museum, and the King Farm (split between historic and protection zones). It clarifies land acquisition rules, allowing the National Park Service to acquire land via donation, purchase, or exchange, and specifies that the King Farm must be used for agriculture, conservation, and educational purposes that maintain its historic character. The bill also establishes the National Park Service Stewardship Institute at the park to promote workshops and best practices in conservation stewardship. These changes directly affect park management, landowners within the expanded boundaries, and the ongoing operations of the King Farm and Billings Farm.