Ariz. Rev. Stat. § 48-1599 – Remittance of collections to district treasurer; division of collections into funds; disbursements; treasurer's report

A. The county treasurer of each county containing a portion of any district, except the county treasurer of the county in which the office of the district is located, on or before the fifteenth day of each month shall remit to the district treasurer all monies, warrants, coupons or bonds collected or received by him on account of the district.
B. The district treasurer by computations based upon certified estimates as returned to the board of supervisors shall divide the money received from taxation on the lands of the district, or from other sources, into district funds corresponding with the purposes therein specified or for which they were paid. The monies received shall be divided as follows:
1. 1. Money received on account of interest on the bonded indebtedness of a district shall be kept in an interest fund.
2. 2. Money received on account of principal of bonded indebtedness of a district shall be kept in a bond fund.
3. 3. Money received on account of the release and discharge of lands in the district from the lien of the bonded indebtedness of the district shall be kept in a call or prepayment fund.
4. 4. Money received on account of maintenance, operation and current expenses for the district shall be kept in a maintenance, operation and current expense fund.
5. 5. Money received on account of the levy for outstanding or deficiency warrants shall be kept in a deficiency fund.
6. 6. Money received from any levy made for payment on completion of the power works of the district shall be kept in a completion fund.
7. 7. If a levy is made or money received from any other source or for any other purpose, the money shall be kept in a separate fund so designated as to identify the purpose for which the money was levied or received.
C. The district treasurer shall pay from the bond fund the principal of bonds of the district at the time and place specified in the bonds, and shall pay from the interest fund the interest on the bonds of the district at the time and place specified therein. The district treasurer shall pay from all of the other funds, except the call or prepayment fund, upon warrants of the district signed by the president and countersigned by the secretary of the district. The district treasurer shall not pay from the bond or interest fund the principal or interest due upon any subsequent issue of bonds until all matured bonds and interest of all prior issues have been paid, or a fund has been created for their payment.
D. The district treasurer shall use the call or prepayment fund for the payment of the highest numbered outstanding bond or bonds. At any time there is one thousand dollars or more in the call or prepayment fund, the district treasurer shall call in the highest numbered outstanding bonds equal to the amount on hand, designating the numbers of the bonds called. The call shall be given by notice in a newspaper published in the county in which the office of the district is located for a period of two weeks, or in a newspaper published in the place where the bonds are payable for a period of ten days. The district treasurer shall call the bonds only once, and shall, after such call, hold the money to pay the bonds until they are presented for payment. The interest on bonds so called shall cease sixty days after the date of the first publication of the call.
E. On or before the fifteenth day of each month the district treasurer shall report to the secretary of the district the amounts available to the credit of the respective funds, the amount of warrants paid during the previous month and the amount of registered unpaid warrants, if any.