Under what conditions or circumstances can a person appoint himself as an Ameer of a town?

Answer

Never is it permissible for a person to become a self-appointed ameer. Only a man who is intoxicated with pride entertains such a despicable desire. The very first factor to disqualify a person from leadership or any post of Amaanat (Trust) is his desire for the leadership. Rasulullah (Sallallahu alayhi wasallam) said: "We do not award (posts) of leadership to a person who hankers after it." Therefore resort to Taubah for the evil desire of the nafs.