257.15  Property tax adjustment.
  1.  Property tax adjustment for 1991-1992.
  a.  For the budget year beginning July 1, 1991, the department of management shall calculate for each district the difference between the sum of the revenues generated by the foundation property tax and the additional property tax in the district calculated under this chapter and the revenues that would have been generated by the foundation property tax and the additional property tax in that district for that budget year calculated under chapter 442, Code 1989, if chapter 442, Code 1989, were in effect, except that the revenues that would have been generated by the additional property tax levy under chapter 442, Code 1989, shall not include revenues generated for the school improvement program. However in making the calculation of the difference in revenues under this subsection, the department shall not include the revenues generated under section 257.37 and under chapter 442, Code 1989, for funding media and educational services through the area education agencies. If the property tax revenues for a district calculated under this chapter exceed the property tax revenues for that district calculated under chapter 442, Code 1989, the department of management shall reduce the revenues raised by the additional property tax levy in that district under this chapter by that difference and the department of education shall pay property tax adjustment aid to the district equal to that difference from moneys appropriated for property tax adjustment aid.
  b.  For purposes of this subsection, in computing the amount of revenues generated by the foundation property tax and the additional property tax under chapter 442, Code 1989, the computation shall be based on a regular program foundation base per pupil of eighty-three percent of the regular program state cost per pupil except that for the portion of weighted enrollment that is additional enrollment because of special education the regular program foundation base per pupil shall be seventy-nine percent of the regular program state cost per pupil. The special education support services foundation base shall be seventy-nine percent of the special education support services state cost per pupil.
  2.  Property tax adjustment aid for 1992-1993 and succeeding years.  For the budget year beginning July 1, 1992, and succeeding budget years, the department of education shall pay property tax adjustment aid to a school district equal to the amount paid to the district for the base year less an amount equal to the product of the percent by which the taxable valuation in the district increased, if the taxable valuation increased, from January 1 of the year prior to the base year to January 1 of the base year and the property tax adjustment aid. The department of management shall adjust the rate of the additional property tax accordingly and notify the department of education of the amount of aid to be paid to each district from moneys appropriated for property tax adjustment aid.
  3.  Property tax adjustment aid appropriation.  There is appropriated from the general fund of the state to the department of education, for each fiscal year, an amount necessary to pay property tax adjustment aid to school districts under this section. Property tax adjustment aid shall be paid to school districts in the manner provided in section 257.16.
  4.  a.  Allocations for maximum adjusted additional property tax levy rate calculation and adjusted additional property tax levy aid.  The department of management shall allocate from amounts appropriated pursuant to section 257.16, subsection 1, and from funds appropriated from the property tax equity and relief fund created in section 257.16A for the purpose of calculating the statewide maximum adjusted additional property tax levy rate and providing adjusted additional property tax levy aid as provided in section 257.4, subsection 1, paragraph “b”, an amount equal to the sum of subparagraphs (1) and (2) as follows:
  (1)  From the amount appropriated from the general fund of the state pursuant to section 257.16, subsection 1, equal to the following:
  (a)  For the budget year beginning July 1, 2006, six million dollars.
  (b)  For the budget year beginning July 1, 2007, twelve million dollars.
  (c)  For the budget year beginning July 1, 2008, eighteen million dollars.
  (d)  For the budget year beginning July 1, 2009, and succeeding budget years, twenty-four million dollars.
  (2)  From the amount appropriated from the property tax equity and relief fund created in section 257.16A.
  b.  After lowering all school district adjusted additional property tax levy rates to the statewide maximum adjusted additional property tax levy rate under paragraph “a”, the department of management shall use any remaining funds at the end of the calendar year to further lower additional property taxes by increasing for the budget year beginning the following July 1, the state foundation base percentage. Moneys used pursuant to this paragraph shall supplant an equal amount of the appropriation made from the general fund of the state pursuant to section 257.16 that represents the increase in state foundation aid.
89 Acts, ch 135, §15; 91 Acts, ch 6, §1; 91 Acts, ch 267, §519; 2006 Acts, ch 1182, §39, 53; 2008 Acts, ch 1134, §2; 2010 Acts, ch 1061, §45; 2013 Acts, ch 121, §5, 9