2005 Arizona Revised Statutes - Revised Statutes §11-212  Supervisorial districts

The board of supervisors shall meet at the county seat on or before December 1 following the release of the United States decennial census data and divide the county into three or five supervisorial districts as provided in this article, which shall be numbered, respectively, districts one, two and three or districts one, two, three, four and five. The board shall define the boundaries and limits of each district and make the division equal or with not more than ten per cent difference in population. The county may redistrict as often as deemed necessary between each United States decennial census.