Iowa Code § 179.7
Every person charged by this chapter or by agreement with the commission with the keeping of records provided for in this chapter shall at the times the commission may by rule require, file with the commission a return on forms to be prescribed and furnished by the commission. Producers shall state the quantity of milk produced. First purchasers shall state the quantity of milk handled, bottled, processed, distributed, delivered to, or purchased by the person from the producers of dairy products or their agents in the state. Returns shall contain other information as the commission may require, and shall be made in triplicate, one copy of which shall be for the files of the person making the return, one copy available at the office of the person for the use of the person's patrons, and the original filed with the commission.
Iowa Code § 179.7
85 Acts, ch 126, §13; 86 Acts, ch 1238, §9