Iowa Code
Chapter 579B - COMMODITY PRODUCTION CONTRACT LIEN
Section 579B.7 - Alternate lien procedure.

579B.7 Alternate lien procedure.
A person who is a custom cattle feedlot operator as defined in section 579A.1 may file and enforce a lien as a contract producer under this chapter or chapter 579A, but not both.
99 Acts, ch 169, §20, 22, 24