How long can a bishop serve?
In the U.S., bishops normally serve in one area for up to two terms, but they can continue for a third term with special approval of the jurisdictional conference. Bishops are elected for life and serve in their assignment until retirement (required by the Book of Discipline to be the jurisdictional conference following their 68th birthday).
In the Central Conferences, bishops are elected for a specific term. If not reelected at the end of the term, the bishop returns to the pastorate and is no longer considered a bishop. Bishops who retire while serving their term are considered bishops for life. In the Africa Central Conference, bishops who are reelected for a second term then become bishops for life.