Upon petition filed with the county auditor, any voter registered within a county may challenge the eligibility or residence of any other voter registered within that county. The petition shall state the grounds for challenge and be accompanied by an affidavit stating that the challenge is based on the challenger's personal knowledge. Within five days after receipt of the petition, the county auditor shall set a date for a hearing on the challenge and notify the challenger by mail. A copy of the petition and notice of the hearing shall be served on the challenged voter by the county auditor in the same manner as in a civil action. The hearing shall be held before the county auditor or the auditor's designee who shall then make findings and affirm or dismiss the challenge.
If a challenge is affirmed, the voter whose registration has been challenged may appeal the ruling to the secretary of state. The appeal shall be heard within five days but in any case before election day. Upon hearing the appeal the secretary of state shall affirm or reverse the ruling and shall give appropriate instructions to the county auditor.
A hearing before the secretary of state shall be conducted as a contested case and determined in accordance with chapter 14.