The following announcement is from the official Pennsic website:

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.

The Gazette will keep you posted on new developments if and as they arise.