qualified property
(ii)if the contract the performance of which was ensured was a contract to construct or improve real property, to produce goods, or to furnish services, the term “qualified property” shall be treated as also including any tangible personal property used by the taxpayer in the performance of such ensured contract. (d)Even though notice of a lien imposed byhas been filed, such lien shall not be valid with respect to a security interest which came into existence after tax lien filing by reason of disbursements made before the 46th day after the date of tax lien filing, or (if earlier) before the person making such disbursements had actual notice or knowledge of tax lien filing, but only if such security interest—