There has been a lot of confusement about this on the TTT server. So here it is.
Regular = 3 days.
Trusted= 3 days and less then 3 warnings (with every extra warning, half a day playtime extra required).
If someone with the "Trusted" rank starts behaving in in a way that doesn't show that they deserve to be trusted, Admins are allowed to change mentioned rank back to Regular, it will then also be more difficult to get the trusted rank back.