what safeguards the level?

yes I have just completely the hanger and hope I get a quick answer. it’s more about the theatrical part and that. what GENAU secures the security at the level? so not the security in the + cable, but the security of the level. there are also steps with external security, which also count with. is so wurss, I really care about the security of the level no matter whether external or internal. then let’s go with the infos.