Ariz. Rev. Stat. § 11-377
F. Bonds issued by a county may bear interest at any rate or rates not in excess of the maximum rate of interest set forth in the resolution calling the election, payable at the times determined by the board of supervisors, provided that each such bond may be evidenced by one instrument, or if commercial paper, by a succession of instruments each bearing interest payable only at maturity. Bonds or commercial paper issued under this article are subject to the following:
6. The board of supervisors may: