(a) "Possessory lien." In this section, "possessory lien" means a lien other than an agricultural lien:
(1) 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;
(2) which is created by operation of law in favor of the person; and
(3) whose effectiveness depends on the person's possession of the goods.
(b) Priority of possessory lien. 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.