The Water Tank can only be used by people authorized by a Sergeant.
The Water Tank can only be used by Rank Lieutenant and up, unless on a Red Watch deployment.
It can be used by any rank when they think it is needed.
It can be used by the Chief and the Chief only.
It can be used by two officers or two senior officers, but nobody else.
The officer which deployed, or the highest ranking member on, who wishes to take charge.
The person with the loudest microphone.
The person who has been in the department the longest.
The person who is in Red Watch.