(1) Subject to ORS 310.070, the county assessor shall compute the rate for each item of ad valorem property taxes, the category rate of ad valorem property taxes for each category described in ORS 310.150 and the total rate of ad valorem property taxes for each taxing district as provided in this section.
(2) If the item of tax that is reported on the notice filed under ORS 310.060 is an amount, the rate of tax for that item shall be computed by dividing the amount by the assessed value used to compute the tax rate. The assessed value used to compute the tax rate is the tax levying district’s assessed value adjusted as otherwise provided by law.
(3) The computed tax rates under subsection (2) of this section or as reported on the notice filed under ORS 310.060 shall be carried to the number of decimal places specified by rule of the Department of Revenue and truncated. The truncated rate shall be expressed as a rate per thousand dollars of assessed value.
(4) All of the taxing district’s taxes that are reported on the notice filed under ORS 310.060 as rates and that are within the same category under ORS 310.150 shall be added together and added to the rates computed under subsection (2) of this section that are within the same category to obtain the category rates for the taxing district.
(5) The total tax rate of the district shall be the total of the truncated tax rates calculated for the taxing district for the year.