You're talking about the AMA safety code versus Federal registration.

You have to register any sUAS to fly one between half a pound and 55 pounds. You don't have to be an AMA member to fly one but now, you have to have an FAA registration.

Your statement that you only need the AMA number on or in your aircraft is incorrect UNLESS you're an AMA member, but that's not the only thing you need now, you'd need both. Unless the AMA can talk the FAA into using some sense and we can use our AMA number to register with the feds

Make sense?