I do have personal first hand experience of this exceptional scenario with boys in the club.
Guys are now pushed to decide at about age 15 if not earlier.
What Cork said was that if the boy is clearly a very strong prospect and a candidate to be on the hurling and football team he will be facilitated and he was in one case.
Otherwise, they ask the players to put themselves forward for one code. If he doesn’t decide which code then Cork will decide for him.
What actually happens in most cases where a guy is involved in both codes at 15yrs + is that after a while he will maybe struggle a bit in one code and will be dropped down to the B panel in that code.. He usually will pull the plug himself then on that