Your new H3 will come without any controller?
You bought ST16S, which works with friends copter, but the copter is not H3? Or it's H3 and you can't drive it? Why just not training with whole friend's equipment?
If the quality of ST16S is the same as this ST16, which I got with the second-hand H, you'll be very disappointed. Guy, who sold me the drone, was tried a few hours. After that, he has dropped the idea for two years. The reason, as I resolve after the purchase, was no stable ST16 behavior. Repairable, but this is not a fair game from the manufacturer's side.
What the rules you mentioned? Link, please.