FAA Regulation

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.

100 mph 100 kts 87 mph

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 ...

Name and Phone Number of the Operator. Address and phone number of the pilot. Location and altitude of the controller.

ensure that the human beings who are not participating in the operation are under a covered structure or inside a non-moving vehicle. ensure the sUAS is equipped with a parachute make sure the area is closed or restricted-access.

The FAA Inspector-in-Charge. The lead visual observer. The Remote Pilot in Command.

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

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.