It is expected that all fleet members be active in SP and active in the fleet. If you are offline for more then a week you are not a contributing member of the fleet. Members who are offline for more then a week will be kicked and invited. You are more then welcome to rejoin once you are able to play regularly again.
If you know ahead of time that you will be away from the game please take the time to post it in this thread. That way your absenteeism will not be held against you.
If you are frozen you are also expected to notify fleet leadership in this thread.