of full years in the period beginning on the 1st day of the calendar quarter during which the property was placed in service by the taxpayer and ending on the day before the beginning of the corresponding calendar quarter ending during such taxable year. The applicable neutral cost recovery ratio shall never be less than 1. The applicable neutral cost recovery ratio shall be rounded to the nearest 1/1000 . (3) Special rule for existing property In the case of any applicable property which is placed in service before the date of enactment of this subsection, subparagraphs (A)(ii) and (B) of paragraph (2) shall be applied by substituting calendar quarter which includes the date of enactment of this subsection for calendar quarter during which the property was placed in service by the taxpayer each place it appears. (4) Gross domestic product deflator For purposes of paragraph (2), the gross domestic product deflator for any calendar quarter is the implicit price deflator for the gross domestic product for such quarter (as shown in the first revision thereof). (5) Election not to have subsection apply This subsection shall not apply to any applicable property if the taxpayer elects not to have this subsection apply to such property. Such an election, once made, shall be irrevocable. (6) Additional deduction not to affect basis or recapture (A) In general The additional amount determined under this section by reason of this subsection shall not be taken into account in determining the adjusted basis of any applicable property or of any interest in a pass-thru entity which holds such property and shall not be treated as a deduction for depreciation for purposes of sections 1245 and 1250. (B) Pass-thru entity defined For purposes of subparagraph (A), the term pass-thru entity means— (i) a regulated investment company, (ii) a real estate investment trust, (iii) an S corporation, (iv) a partnership, (v) an estate or trust, and (vi) a common trust fund. (7) Applicable property For purposes of this subsection, the term