Well, well ....... it's happy hour on TiBB again.
So much for hoping for a quiet night tonight.
In answer to the question, receiving three individual warnings results in an automatic temporary ban from the Forum. Each individual warning lasts for 3 days. Once that time has elapsed, the warning is removed and the poster can return to the Forum.
However ........... if they carry on posting in a similar manner which results in further warnings being issued, then they may well be banned permanently.
Hope that clears it up.