“The National Parks and Wildlife Conservation Act, 2029 BS and the Himalayan National Park Regulations, 2036 BS, among other laws, state that the said body does not have the authority to restrict airspace above any national parks or wildlife reservations...”
Source: A statement by the Civil Aviation Authority of Nepal (CAAN) countering the attempt by Sagarmatha National Park officials to consider placing a ban on commercial helicopter flights. The park, home to the famous Mount Everest, draws in upwards of 100,000 visitors per year.