Subchapter lix-ii. Lewis and Clark National Historical Park 16 U.S. Code §410kkk-1. Lewis and Clark National Historical Park 16 U.S. Code §410kkk-2. Administration 16 U.S. Code §410kkk-3. References 16 U.S. Code §410kkk-4. Private property protection 16 U.S. Code §410kkk-5. Authorization of appropriations 16 U.S. Code §410kkk. Definitions