Iowa Code § 207.28: Employee protection.

1. A person shall not discharge, or in any other way discriminate against, any employee or any authorized representative of employees by reason of the fact that such employee or representative has filed, instituted, or caused to be filed or instituted any proceeding under this chapter, or has testified or is about to testify in any proceeding resulting from the administration or enforcement of the provisions of this chapter.

2. Any employee or a representative of employees who believes that the employee or representative has been fired or discriminated against by a person in violation of subsection 1 of this section may, within thirty days after the alleged violation occurs, apply to the administrator for a review as provided by rule of the firing or alleged discrimination.