Iowa Code § 183A.8
A producer from whom the assessment has been deducted, upon written application filed with the council within thirty days after its collection, shall have that amount refunded by the council. Application forms shall be given by the council to each first purchaser when requested and the first purchaser shall make the applications available to any producer. Each application for a refund by a producer shall have attached a proof of assessment deducted. The proof of assessment deducted shall be in the form of the original or a copy of the purchase invoice by the first purchaser. The council shall have no more than thirty days from the date the application for refund is received to remit the refund to the producer.
Iowa Code § 183A.8
85 Acts, ch 199, §8; 86 Acts, ch 1076, §1
Right to refund not subject to execution or transfer; §179.5A