Iowa Admin. Code r. 21-41.12
Every shipment of whole cottonseed being sold in Iowa for animal feed use shall either be accompanied by a laboratory analysis for aflatoxin B1 and the distributor shall provide the laboratory analysis with the bill of lading or invoice to the first purchaser of the whole cottonseed being sold for animal feed use or the shipment shall be tested by the first purchaser. The first purchaser shall provide a copy of the laboratory analysis to each subsequent purchaser. The whole cottonseed being sold for animal feed use must meet all livestock feeding guidelines established by the Food and Drug Administration regarding aflatoxin B1. Whole cottonseed sold for animal feed use which does not meet the guidelines established by the Food and Drug Administration will be considered adulterated under the provisions of Iowa Code section 198.7.
Iowa Admin. Code r. 21-41.12