FAA Regulation

The applicant must have logged 20 hours of flight time. The applicant must be a US Citizen. The applicant must be at least 16 years old.

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 ...

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

is required to receive ATC authorization.  must use a visual observer. is required to file a flight plan.

Fly as a recreational flyer until you pass the recurrent training online with the FAA.  Continue flying as a Remote Pilot, there is a 30-day window to take the recurrent. Fly ...

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.

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

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.