Iowa Code § 43.91: Voter at caucus — qualifications.

1. Any person voting at a precinct caucus must be a person who is or will by the date of the next general election become an eligible elector, who has not already participated in the caucus of any political party within the same year, and who is a resident of the precinct. A list of the names and addresses of each person to whom a ballot was delivered or who was allowed to vote in each precinct caucus shall be prepared by the caucus chairperson and secretary who shall certify such list to the commissioner at the same time as the names of those elected as delegates and party committee members are so certified.

2. Notwithstanding subsection 1, the state central committee of each political party may set rules for participation in or voting at a precinct caucus, including but not limited to voter registration requirements.