Iowa Code § 43.55: Nominee certified.

The board of supervisors shall separately prepare and certify a list of the candidates of each party so nominated. It shall deliver to the chairperson of each party central committee for the county a copy of the list of candidates nominated by that party; and shall also certify and deliver to the chairperson a list of the offices to be filled by the voters of the county for which no candidate of that party was nominated, together with the names of all of the candidates for each of these offices who were voted for at the primary election and the number of votes received by each of such candidates.