In 2000, Congress enacted the National Park Air Tour Management Act (NPATMA), requiring operators to seek FAA authorization for commercial air tours over national parks or tribal lands. The NPATMA established the National Parks Overflights Advisory Group (NPOAG) to provide advice and counsel related to commercial air tour operations over and near national parks. Amendments in 2012 allowed voluntary agreements with air tour operators. Legal actions prompted the FAA and the National Park Service (NPS) to propose a plan in 2020 for bringing all 23 eligible parks into compliance within two years, but the development process excluded input from the NPOAG, raising industry concerns about safety and economic impact among other issues.