Minn. Stat. § 168A.16: INAPPLICABLE LIEN OR SECURITY INTEREST.

(a) Sections 168A.01 to 168A.31 do not apply to or affect:

(1) a lien given by statute or rule of law to a supplier of services or materials for the vehicle;

(2) a lien given by statute to the United States;

(3) a security interest in a vehicle created by a manufacturer or dealer who holds the vehicle for sale.

(b) Sections 168A.17 to 168A.19 do not apply to or affect a lien given by statute or assignment to this state or any political subdivision of this state.