2.
In lieu of the valuation and assessment provisions in chapter 437A, section 441.21, subsection 8, paragraphs "b", "c", and "d", and sections 428.24 through 428.26, 428.28, and 428.29, as applicable, wind energy conversion property which is first assessed for property taxation on or after January 1, 1994, and on or after the effective date of the ordinance enacted pursuant to subsection 1, shall be valued by the local assessor for property tax purposes as follows:
a. For the first assessment year, at zero percent of the net acquisition cost.
b. For the second through sixth assessment years, at a percent of the net acquisition cost which rate increases by five percentage points each assessment year.
c. For the seventh and succeeding assessment years, at thirty percent of the net acquisition cost.