For those who are going to be inactive for a few days or more (up to two months - more would constitute retirement, not leave).

You must request leave in the leave forum.

While on leave...
...you are not eligible for Squad Wars.
...you are not required to report in or be active in the forums while on leave.

Upon return, you must reply to your post in the leave forum, stating you have returned.

If you do not request leave and are inactive for a certain periot of time, you will be considered AWOL.