The ranking status is similar to BF4,
There are four options, Official, Ranked, Unranked or Private
In the battlelog this is displayed in two boxes, the only difference between a Official and a Ranked server is that a Official Server has a fixed Map list.
In the Startup.txt you can change these options:
If you change your server Type to Official you also need to specifiy a gamemode with the vars.mpExperience
# Server Type - Official, Ranked, Unranked or Private vars.serverType "Ranked"
# Experience enabled Options: TWL, TDM (to be confirmed), HEIST, BLOOD MONEY, HOTWIRE, RESCUE or CROSSHAIR # If you set your server to official, you should uncomment this vars.mpExperience "TWL"