[Tilted Irish Kilt]

Openurmind :" While there may be restricted areas in the building, the biulding it’s self is public access."

So essentially, those who were there could be charged with being there without benefit of having an approved ticket ?

[Openurmind]

If this is the case legally, I would say all they can be charged with might be jumping around the entrance security requirements. Even for public access I could understand a weapons check at the door. And this could be the only building access restriction. Bringing in any weapons.