To be eligible to fill the office of district attorney, a person must:

(1) Have been a resident citizen of this state three years just preceding his election or appointment;

(2) Permanently reside in the circuit at the time of his election or appointment;

(3) Have attained the age of 25 years;

(4) Have been duly admitted and licensed to practice law in the superior courts for at least three years; and

(5) If previously disbarred from the practice of law, have been reinstated as provided by law.