There is that Tchortist guard who really wants to make sure you are not a Faceless spy and thus, if you don't have robes on, he demands you to explain why. The thing is, it appears that Tchortist Rassophore armor is sufficient for the purpose of passing his requirement, but 'Tchortist robes', the non-protective ones you can get from the Tchortist rearguard at the Coretech facility which grant Stealth and Intimidation, do not - even if you have these on the guard asks why you don't have your robes. I think you should definitely be able to pass the guards with this kind of robe. (I'm not sure if there are other kinds of Tchortist armor the player can wear, but perhaps they should be checked as well if there are.)
