Oregon Revised Statutes Aviation § 838.060

(1) A district may levy annually an ad valorem tax on all taxable property within its boundaries not to exceed in any one year one-half percent (0.005) of the real market value of all taxable property within the boundaries of the district, computed in accordance with ORS 308.207. The district may also annually assess, levy and collect a special tax upon all such property in an amount sufficient to pay the yearly interest on bonds previously issued by the district and then outstanding, together with any portion of the principal of such bonds maturing within the year. The special tax shall be applied only in payment of the interest and principal of bonds issued by the corporation, but the corporation may apply any funds it may have toward the payment of principal and interest of any such bonds.

(2) Such taxes shall be levied in each year and returned to the county officer whose duty it is to extend the tax levy as provided in ORS 310.060. All taxes levied by the district shall become payable at the same time and be collected by the same officer who collects county taxes and shall be turned over to the district according to law. The county officer whose duty it is to extend the county levy shall extend the levy of the district in the same manner as city taxes are extended. Property shall be subject to sale for nonpayment of taxes levied by the corporation in like manner and with like effect as in the case of county and state taxes.

(3) In taxation a district may classify property on the basis of services received from the district and prescribe different tax rates for the different classes of property.