The Federal Aviation Administration requires registration of many drones flown in the US, for hobby or commercial purposes.
To learn more about operating UAVs in the United States, visit the Federal Aviation Administration's UAS website, including frequently asked questions. Remember that rules vary by location. Amazon provides these links for educational purposes only.
The UN International Civil Aviation Organization (ICAO) provides a helpful one-stop resource for country-by-country UAS guidance and advice supporting safe and compliant flight operations. Amazon provides these links for educational purposes only.