Iowa Code § 554.9333: Priority of certain liens arising by operation of law.

1. In this section, “possessory lien” means an interest, other than a security interest or an agricultural lien:

a. which secures payment or performance of an obligation for services or materials furnished with respect to goods by a person in the ordinary course of the person’s business;

b. which is created by statute or rule of law in favor of the person; and

c. whose effectiveness depends on the person’s possession of the goods.

2. A possessory lien on goods has priority over a security interest in the goods unless the lien is created by a statute that expressly provides otherwise.