Iowa Code
Chapter 45 - NOMINATIONS BY PETITION
Section 45.2 - Adding name by petition.

45.2 Adding name by petition.
The name of a candidate placed upon the ballot by any other method than by petition shall not be added by petition for the same office in the same election.
[C97, §1100; C24, §651; C27, 31, 35, §655-a18; C39, §655.18; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §45.2]
Other methods, chapters 43, 44