FAA Regulation

No, 14 CFR Part 107 only applies to sUAS weighing less than 0.55 lbs. Yes, there is no lower weight limit for operating under 14 CFR Part 107.   No, roof ...

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.

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

Objects carried on the sUAS are secure.   The site supervisor has approved the flight. ATC has granted clearance.

must not cause injury to a human being equivalent to 11 ft-lb of kinetic energy.  must have an approved type certificate issued under Part 21. must not cause injury to a ...

filed a IFR flight plan. received prior authorization from the controlling agency.  received prior permission from the commanding officer of the nearest military base.

receive type certification under Part 21. have remote ID for all operations over human beings. be operated by a Part 61 pilot.

No, the other people in the park are not on notice.  Yes, as long as the park is not busy enough that it would be considered an open-air assembly of human beings.

No more than three as long as the Remote PIC maintains visual line of sight. As many as he/she can handle. No more than one. 

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