Statement issued by the Pennsic staff:

In compliance with new Pennsylvania Commonwealth Law and due to potential medical risk considerations involving martial activities the following policy is now in effect:

Minors authorized in martial activities and bearing a gold tape diamond on their helms on which their parent or legal guardian’s cell phone number is written, may participate in battles. Parents should have the cell phone in hand in case of emergency

Additionally, from the Midrealm Earl Marshal:

NB: The mayor has incorrectly stated that the gold diamond for rapier combatants should be on the helm – it should be on the cuff of the gauntlet, per Society Rules.