Maryland Commercial Law Section 9-333

      (a)      In this section, "possessory lien" means an interest, other than a security interest or 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 statute or rule of law in favor of the person; and

            (3)      Whose effectiveness depends on the person's possession of the goods.

      (b)      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.