(A) After the expiration of
(i) 180 days after the date of the sale, transfer, or change of use for which a notice is required by subsection (b) of this section in the case of a facility which is sold or transferred or the use of which changes after July 18, 1984, or
(ii) thirty days after July 18, 1984, or if later 180 days after the date of the sale, transfer, or change of use for which a notice is required by subsection (b) of this section, in the case of a facility which was sold or transferred or the use of which changed before July 18, 1984,
the amount which the United States is entitled to recover under paragraph (1) with respect to a facility shall be the amount prescribed by paragraph (1) plus interest, during the period described in subparagraph (B), at a rate (determined by the Secretary) based on the average of the bond equivalent of the weekly 90-day Treasury bill auction rate.
(B) The period referred to in subparagraph (A) is the period beginning
(i) in the case of a facility which was sold or transferred or the use of which changed before July 18, 1984, thirty days after such date or if later 180 days after the date of the sale, transfer, or change of use for which a notice is required by subsection (b) of this section.
(ii) in the case of a facility with respect to which notice is provided in accordance with subsection (b) of this section, upon the expiration of 180 days after the receipt of such notice, or
(iii) in the case of a facility with respect to which such notice is not provided as prescribed by subsection (b) of this section, on the date of the sale, transfer, or changes of use for which such notice was to be provided,
and ending on the date the amount the United States is entitled to under paragraph (1) is collected.