The Jury Commissioner's Office provides jurors for all trial divisions of the Superior Court, and in some counties for the justice courts and municipal courts. All US citizens are qualified for jury service if they are at least 18 years old, are residents of the jurisdiction in which they have been summoned to serve.The Arizona Motor Vehicle Division and Voter Registration Department create a master list of names of individuals eligible for jury trial. • Written information in Spanish on how to access and navigate the court;. • Multilingual signage throughout the courthouse in the following languages: Spanish;. The following persons shall be excused temporarily from service as a juror if the judge or jury commissioner finds that any of the following applies. Information for Jurors. Potential jurors must complete the juror qualification questionnaire. Jury service lasts for one day or the length of one trial. On the first day of jury service, be prepared to remain at the courthouse the entire day.