My drone has been externally labeled since day 1. I personally don't think it's a big deal. The (new) regulation is not specific about the size or method of identification other than it must remain affixed for the duration of each drone operation, it must be legible, and can be seen upon visual inspection of the aircraft's exterior. It doesn't have to be so large that it can be read from the ground when the aircraft is in flight. I used a P-touch label maker and made a small but legible label. It took me less than 5 minutes. I put it directly above the PHANTOM logo along with my AMA member number. I think I may ad contact information as well.