AZ Rev Stat § 48-1915 (2021)
2021 Arizona Revised Statutes|Title 48 - Special Taxing Districts|§ 48-1915 - Deposit and payment of district monies; investment and reinvestment of sinking fund

48-1915.  Deposit and payment of district monies;  investment and reinvestment of sinking fund A. Monies received for a hospital district from any source shall be deposited with the county treasurer of the organizing county to the credit of the hospital district,  and paid out only on warrants approved by the board of directors of the district. B. The board of directors of the district,  with the consent of the board of supervisors,  may invest and reinvest all monies belonging or credited to the district as a sinking fund. The investment shall be made for the best interests of the district. C. The monies in the fund may be invested and reinvested under the authority of the federal farm credit act of 1933,  or invested and reinvested in any of the following: 1. Bonds or other evidences of indebtedness of the United States of America or any of its agencies or instrumentalities when such obligations are guaranteed as to principal and interest by the United States of America or by any agency or instrumentality thereof. 2. Bonds or other evidences of indebtedness of this state or of any of the counties,  incorporated cities or towns or duly organized school districts of this state. 3. Bonds,  notes or evidences of indebtedness of any county,  municipality or municipal district utility within this state that are payable from revenues or earnings specifically pledged for the payment of the principal and interest on such obligations,  and for the payment of which a lawful sinking fund or reserve fund has been established and is being maintained,  but only if no default in payment of principal or interest on the obligations to be purchased has occurred within five years of the date of investment therein,  or,  if such obligations were issued less than five years prior to the date of investment,  no default in payment of principal or interest has occurred on the obligations to be purchased,  nor on any other obligations of the issuer within five years of such an investment. 4. Bonds,  notes or evidences of indebtedness issued by any municipal improvement district in this state to finance local improvements authorized by law,  if the principal and interest of such obligations are payable from assessments on real property within such a local improvement district. No such investment shall be made if the face value of all such obligations,  and similar obligations outstanding,  exceed fifty percent of the market value of the real property and improvements on which such bonds or the assessments for the payment of principal and interest thereon are liens inferior only to the liens for general ad valorem property taxes. Such an investment shall be made only if no default in payment of principal or interest on the obligations to be purchased has occurred within five years of the date of investment therein,  or,  if such obligations were issued less than five years prior to the date of investment,  no default in payment of principal or interest has occurred on the obligations to be purchased,  nor on any other obligation of the issuer within five years of such an investment. 5. Interest-bearing saving accounts or certificates of deposit insured in banks or savings and loan associations doing business in Arizona by the federal deposit insurance corporation,  or the federal savings and loan insurance corporation,  but only if they are secured by the depository to the same extent and in the same manner as required by the general depository law of the state. Security shall not be required for that portion of any deposit that is insured under any law of the United States. 6. Deposits placed in accordance with the procedures prescribed in section 35-323.01. D. The purchase of the securities shall be made by the county treasurer on authority of a resolution of the board of directors,  approved by the board of supervisors. The county treasurer shall be the custodian of all securities so purchased. The bonds may be sold on an order of the board of directors with the consent of the board of supervisors. E. All monies earned as interest or otherwise derived by virtue of this section shall be credited to the sinking fund.