Iowa Code Title II. Elections and Official Duties [Chs. 39-79] § 54.1. Time of election--qualifications

At the general election in the years of the presidential election, or at such other times as the Congress of the United States may direct, there shall be elected by the voters of the state one person from each congressional district into which the state is divided, and two from the state at large, as electors of president and vice president, no one of whom shall be a person holding the office of senator or representative in Congress, or any office of trust or profit under the United States.