Iowa Code § 172D.2: Compliance — a defense to nuisance actions.

In any nuisance action or proceeding against a feedlot brought by or on behalf of a person whose date of ownership of realty is subsequent to the established date of operation of that feedlot, proof of compliance with sections 172D.3 and 172D.4 shall be an absolute defense, provided that the conditions or circumstances alleged to constitute a nuisance are subject to regulatory jurisdiction in accordance with either section 172D.3 or 172D.4.