In the organizer's words:

Bring a valid, official photo ID! (identity card, passport or driver's license)
A photo of the ID is not sufficient.
Admission to the concert is possible from the age of 14 unaccompanied.
Admission to the concert is possible from the age of 6 if accompanied by a parent or guardian.
Unaccompanied minors must leave the club at the end of the event; "mummy slips" will not be accepted.

Price information:

Please bring a valid, official photo ID with you! (ID card, passport or driving license) A photo of the ID is not sufficient. Admission to the concert is possible from the age of 14 unaccompanied. Admission to the concert is possible from the age of 6 accompanied by a parent or guardian. Unaccompanied minors must leave the club at the end of the event, "mummy slips" will not be accepted.