Uniform Commercial Code

U.C.C. - ARTICLE 9 - SECURED TRANSACTIONS; SALES OF ACCOUNTS AND CHATTEL PAPER
..PART 3. RIGHTS OF THIRD PARTIES; PERFECTED AND UNPERFECTED SECURITY INTERESTS; RULES OF PRIORITY

§ 9-310. Priority of Certain Liens Arising by Operation of Law.

When a person in the ordinary course of his business furnishes services or materials with respect to goods subject to a security interest, a lien upon goods in the possession of such person given by statute or rule of law for such materials or services takes priority over a perfected security interest unless the lien is statutory and the statute expressly provides otherwise.