Some of the most notable of these are the administrative law judges handling election law violations in the Colorado Secretary of State's office, the Public Utilities Commission when it acts in a quasi-judicial manner, unemployment-insurance hearing officers, administrative law judges handling motor vehicle license revocations, quasi-judicial municipal land use boards, professional regulatory boards, and an Independent Ethics Commission. The judicial branch is headed by the Colorado Supreme Court, the state supreme court. The Colorado Supreme Court selects the Chief Justice of the Colorado Supreme Court from its own membership who is the executive head of the judicial system. In addition to its role as the state's highest appellate court, the Colorado Supreme Court supervises the state court system and the state's lawyers. The Colorado Bar Association, the Denver Bar Association, and the Colorado Criminal Defense Bar are examples of voluntary bar associations in Colorado. The Integrated Colorado Courts E-Filing System (ICCES) is the electronic court filing system. There is no official reporter. The "Colorado Reporter" (a Colorado-specific version of the "Pacific Reporter") is an unofficial reporter for appellate decisions from 1883. Decisions of the Colorado Supreme Court were published in the official "Colorado Reports" from 1864 to 1980, and decisions of the Court of Appeals were published in the official "Colorado Court of Appeals Reports" from 1891 to 1980. When vacancies occurs on the Supreme Court, Court of Appeals, district court, or county court, a judicial nominating commission recommends to the governor three (for appellate courts) and two or three (for trial courts) qualified candidates to fill the vacancy. The governor appoints a judge from the commission's list. All judges are subject to retention elections. The appointment and retention of municipal court judges is governed by municipal ordinance. All or almost all municipal judges are appointed. Denver County Court judges are appointed by the mayor from choices presented by a blue ribbon merit selection committee, and subject to retention elections in the same manner as state court system county court judges. The Colorado Supreme Court Nominating Commission recommends candidates to fill vacancies on the Supreme Court and Court of Appeals. For the district courts and county courts, a judicial district nominating commission in each of the 22 judicial districts recommends candidates to the Governor of Colorado for consideration and appointment. The Denver County Court Judicial Nomination Commission recommends candidates to the Mayor of Denver to fill vacancies on the Denver County Court. Appellate judges, district court judges, Denver Probate Court judges, juvenile court judges and county court judges in larger counties are required to be lawyers. Trial courts also often have magistrates with many judicial powers appointed by the court who must also be lawyers.