Iowa Code § 70A.19: Payroll deduction for employee organization dues prohibited.

The state, a state agency, a regents institution, a board of directors of a school district, a community college, or an area education agency, a county board of supervisors, a governing body of a city, or any other public employer as defined in section 20.3 shall not authorize or administer a deduction from the salaries or wages of its employees for membership dues to an employee organization as defined in section 20.3.