Constitution of the State of Illinois Art. VI, § 12. Election and Retention

(a) Supreme, Appellate and Circuit Judges shall be nominated at primary elections or by petition. Judges shall be elected at general or judicial elections as the General Assembly shall provide by law. A person eligible for the office of Judge may cause his name to appear on the ballot as a candidate for Judge at the primary and at the general or judicial elections by submitting petitions. The General Assembly shall prescribe by law the requirements for petitions.

(b) The office of a Judge shall be vacant upon his death, resignation, retirement, removal, or upon the conclusion of his term without retention in office. Whenever an additional Appellate or Circuit Judge is authorized by law, the office shall be filled in the manner provided for filling a vacancy in that office.

(c) A vacancy occurring in the office of Supreme, Appellate or Circuit Judge shall be filled as the General Assembly may provide by law. In the absence of a law, vacancies may be filled by appointment by the Supreme Court. A person appointed to fill a vacancy 60 or more days prior to the next primary election to nominate Judges shall serve until the vacancy is filled for a term at the next general or judicial election. A person appointed to fill a vacancy less than 60 days prior to the next primary election to nominate Judges shall serve until the vacancy is filled at the second general or judicial election following such appointment.

(d) Not less than six months before the general election preceding the expiration of his term of office, a Supreme, Appellate or Circuit Judge who has been elected to that office may file in the office of the Secretary of State a declaration of candidacy to succeed himself. The Secretary of State, not less than 63 days before the election, shall certify the Judge's candidacy to the proper election officials. The names of Judges seeking retention shall be submitted to the electors, separately and without party designation, on the sole question whether each Judge shall be retained in office for another term. The retention elections shall be conducted at general elections in the appropriate Judicial District, for Supreme and Appellate Judges, and in the circuit for Circuit Judges. The affirmative vote of three-fifths of the electors voting on the question shall elect the Judge to the office for a term commencing on the first Monday in December following his election.

(e) A law reducing the number of Appellate or Circuit Judges shall be without prejudice to the right of the Judges affected to seek retention in office. A reduction shall become effective when a vacancy occurs in the affected unit.