Ariz. Rev. Stat. § 15-1001
A. The board of supervisors of each county shall annually budget for the special county school reserve fund an amount to meet the requirements of that fund. Warrants drawn on the special county school reserve fund shall be approved prior to payment by the board of supervisors, as other county warrants are approved, or this responsibility may be delegated by the board of supervisors to the county school superintendent. The budgeted amounts for the special county school reserve fund shall be itemized and estimated to meet the following needs: