From what I understand at my sons high school, they have an archery club. Its pretty much the archery in schools program, and the only bows allowed are the Mathews Genesis compounds. Must be a nice market for Mathews.
I was trying to encourage my son to to get involved, but he said none of the bows are set up properly, poorly matched arrows, and a gym teacher for the instructor. He wanted to bring his longbow, and they would not allow it because of that favorite word- liability. He elected to not join. Its too bad they push some kids away, who otherwise would love the competition and recreation of shooting a league.
I was disappointed that he would not be allowed to participate with his bow, as I thought he could provide a good introduction to traditional archery to the other kids. He is the only kid in his HS that shoots trad. even with all the ribbing and so forth, he holds his own, and has never once even considered switching to wheels due to peer pressure or any other reason. Trad to the core that boy is.
Of course archery leagues apart from a school sanctioned program would probably be free to allow anything they wanted.