How to disable trade?

How do you disable trade items/mail items to GMs?

Is there any different chautority or only P and F?

Fame files ;-; thought you'd understand by F and P chautority

WEll i found it, but I need to know how to disable it for Gm only, they are in
defineNeuz
defineText
TextClient

and the shop chars

I don't get where to change that lol