This is very handy for example with serial lines. When users time is up, session will be killed. Timing option also has authorization check. If user passes it, user will have no time limit. If user fails authentication, default time limit is set for user.
Timing has also a time bank system.
This means that user can have for example 60 minutes time limit, for one day. With ttc you can also control users logons on timed terminal types. This means that if login limit is given, user is able to logon during that day, that many times defined in login limit. New feature in this version is deny access option. This option should be used very carefully.