ADMITTED means nothing to a Rugby player. But, to a rugby administrator, league president, or coach, Admitted means that if your Sports GL underwriter goes belly up, then the state fund used to protect insurance companies will cover the loss. (In theory...)
Risk Specialists (AIG) going admitted just adds another layer of security for the youth sports league or team.
The two biggies here are Participant's Liability and Abuse Molestation Liability. Here's why both are absolutely necessary if you want to protect the kids.
Ping me for more info or a quote.