Please halp- cosplay related- world finals in Berlin

So I got tickets for this year's world finals in Berlin (I live in Germany) and Id love to do a cosplay. Problem is, I cant find any information on which weapon imitates/ kinds and sizes of weapon imitated the event will allow. As I dont wanna spend time and money on my yasuo cosplay and ending up not being able to bring a replica of his huge sword (huehuehue), Im asking in advance. Ive read the general ruling on the Mercedes Benz Arena's website but it was not very helpful as it doesn't consider cosplaying in any way shape or form. does Annie- one know where I can get information on wether a Yasuo- scale sword would be okay to bring?

Edit: just emailed the Mercedes Benz Arena. Well see how this turns out Ill keep you updated.