Over suburban areas. Over a parade or other social events. Over a sparsely populated area.  

If prior permission is received from the Federal Aviation Administration. If precautions are taken to avoid injury or damage to persons or property on the surface.  Only in an emergency.

Remote Pilot in Command. Commercial Balloon pilot. Designated Pilot Examiner.

make sure the UAS is within 400 feet of the control station. maintain line of sight throughout the entire process.   have a visual observer.

No Medical Certificates are required. A Class 3 Medical Certificate A Class 2 Medical Certificate.

the Remote PIC.  the controlling agency. Air Traffic Control.

Denial of application for Remote Pilot, waivers, or suspension/revocation, or a civil penalty.  Jail time of up to 1 year A required checkride with the FAA