Ocmulgee Mounds National Park and Preserve Establishment Act

This bill redesignates the existing Ocmulgee Mounds National Historical Park as "Ocmulgee Mounds National Park" and establishes a separate "Ocmulgee Mounds National Preserve" in Georgia under the National Park System. It authorizes the Secretary of the Interior to acquire land for both areas only through voluntary purchases from willing sellers (not eminent domain), with boundaries defined by a specific map. The bill mandates co-management of the park and preserve with the Muscogee (Creek) Nation, allows tribal members to continue traditional ceremonies and hunting/fishing under state/federal laws, and requires an advisory council with tribal representation. The National Park Service must administer both areas as a single unit while respecting tribal cultural uses and existing wildlife refuge management.