Registered drones must always transmit RID. So, if he decides to sometimes use regular batteries instead, he'll need to attach an RID module like the Holy Stone or Ruko.
That said, it probably doesn't make sense to ever mix plus and regular...
No, that's not how drone registration works today. I understand it's confusing, and I'm sure many people assume it works that way. That's why I felt it was important to mention it earlier, even though you didn't bring it up, as you noted.
From...
For easier interpretation:
Is it "flown strictly for recreational purposes"? If not, then it's a flight that requires a Remote Pilot Certificate.
Public COA, 333, and a few other minor exceptions may apply as well, but 99+% of all drone...
Nope.
14 CFR §107 is the default set of rules for UAS use in the NAS. Nowhere in §107 is the word "commercial" ever found. Unless you are flying recreationally (with a couple of other less used exceptions), every drone flight in the U.S. is...