One is not nominated or appointed to the position of chief judge (except for the Chief Justice of the United States); they assume the position based on seniority. The same criteria exists for circuit and district chiefs. The chief judge is the judge in regular active service who is senior in commission of those judges who are (1) 64 years of age or under; (2) have served for one year or more as a judge; and (3) have not previously served as chief judge.