I think for safety and other reasons...a cell phone / walkie-talkie are more than exceptable.
I also agree "aid" is a very broad term that to me gives a person too much room for interpretation.
One hypothetical that would use them to help kill a deer....i saw a show where a guy made a huge circle on a bedded buck while the camera man stayed put at the truck. The camera man could see the hunters approach...and see where the deer was bedded...however, the hunter could not see the deer. They tried hand signals, but eventually the deer snuck away unseen by the hunter. Had they had a walkie-talkie to communicate, the outcome could have been much different.
Not sure how i feel about this....on one hand you still need the skill to stalk within range, but on the other, 15-20 years ago, the hand signals (Which failed) would have been all you had.
