This was slightly explained in the "Staff Rules", but i will go more in depth here.
there are 3 stages to basic promotion-back-to-staff thingy. But for any of it to matter, you have to have a decent excuse.
1. Approval by players.
2. Approval by staff
3. approval by CoS/Co-Owner/Owner
stage #1 will be decided by the overall players that post in the section. it has to be at least 50%. Without valid excuse, 75%.
stage #2 will be decided by staff in a thread normal players cannot see.
stage #3 will be decided through PM, Ingame or other.
if you pass those 3, you regain staff status.