At 17 years old, going to a concert without accommodation and without written permission?

Hey,

I'm going to a David Guetta concert with a friend on Saturday. We're both 17. As far as I understand, it's fine if we only stay until midnight. So, apparently, we don't need a chaperone. But do we still need some kind of parental consent?

Or can we just go there unaccompanied and without permission and don't have to do anything else?

Here again what I found from the organizer on the subject:

best regards

Christopher