(b) Special lien for property valued under Section 2032A of the Internal Revenue Code. In the event the Illinois estate tax is reduced as a result of an election under Section 2032A of the Internal Revenue Code, then an amount equal to the additional Illinois estate tax that would be due in the absence of such an election shall be a lien in favor of this State on the transferred property that has a tax situs in this State and is subject to such election. The lien imposed by this subsection shall arise at the time an election is filed under Section 2032A of the Internal Revenue Code and shall continue with respect to such transferred property: (1) until the liability for the Illinois estate tax with respect to such transferred property has been satisfied or has become unenforceable by reason of lapse of time or otherwise; or (2) until it is established to the satisfaction of the Attorney General that no further tax liability may arise under this Act with respect to such transferred property. The lien imposed by this subsection shall not be valid as against any purchaser, mortgagee, pledgee, other holder of a security interest, mechanic's lien, or judgment lien creditor until notice of such lien has been filed as provided by the laws of this State. In regulations prescribed in accordance with Section 16 of this Act, the Attorney General may require that the qualified heir file such notice of lien. Even though notice of said lien has been filed as provided in the preceding sentence, such lien shall be subject to the rules set forth in paragraph (3) of Section 6324A(d) of the Internal Revenue Code as if the lien were a lien imposed by that Section.