If you are a Team leader and have been inactive for 30 days or more you will be removed as leader of your team and the next highest ranked active player in the Team will be made leader.
Team leaders are considered inactive if they have not used the Team chat to either send messages or send/request for lives.

If you are a Team leader and were removed from your team we will not be able to restore you as the leader. To avoid being removed as Team leader it is best to keep your account active by logging into the game regularly, using the in game chat or regularly sending and requesting for lives.