US Code Title 16 - Conservation: Chapter 1 - National Parks, Military Parks, Monuments, and Seashores; Subchapter 1 - National Park Service
Policies and procedures for obtaining permits on National Parks Service lands
National Parks Service
Director's Order #53: Special Park Uses
Special Uses document defining activities and ways to obtain permits for it on National Parks Service land.
Current Administrative Boundaries of the National Park System Units
National Park Service unit boundaries. Service wide boundary set for display and general analysis purposes.