FAA Regulation

55 lbs. or less. 55 kg or less. Less than 55 lbs. 

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.

Without the possibility of direct human intervention from within or on the aircraft.  For hobby and recreational use when not certificated. During search and rescue operations other than public.

Visual observer. Person manipulating the controls. Remote Pilot in Command (Remote PIC). 

Yes, as long as it meets Remote ID requirements. No, it is not permitted.  Yes, it is permitted without limitations.

Ensure the aircraft is equipped with a parachute. Ensure that the area is restricted-access and that everyone inside moving vehicles inside the area are on notice.   Ensure that everyone inside ...

They can maintain line of sight and without loss of control.  They briefed each other before the flight. They are in radio contact the entire time.

must not cause injury equivalent to 25 foot-pounds of kinetic energy upon impact. be operated in accordance with the operating limitations specified in the approved Flight Manual. be 0.55 pounds or ...