US Code
SUBCHAPTER III— THE ESTATE
§ 545. Statutory liens

(1) first becomes effective against the debtor—(A) when a case under this title concerning the debtor is commenced;
(B) when an insolvency proceeding other than under this title concerning the debtor is commenced;
(C) when a custodian is appointed or authorized to take or takes possession;
(D) when the debtor becomes insolvent;
(E) when the debtor’s financial condition fails to meet a specified standard; or
(F) at the time of an execution against property of the debtor levied at the instance of an entity other than the holder of such statutory lien;
(2) is not perfected or enforceable at the time of the commencement of the case against a bona fide purchaser that purchases such property at the time of the commencement of the case, whether or not such a purchaser exists, except in any case in which a purchaser is a purchaser described in section 6323 of the Internal Revenue Code of 1986, or in any other similar provision of State or local law;
(3) is for rent; or
(4) is a lien of distress for rent.

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