(1) As used in this section, unless the context otherwise requires:

(a) "CPI" means the consumer price index (annual average) for all urban consumers (CPI-U): United States city average -- all items, reported by the bureau of labor statistics, United States department of labor or its successor agency or, if the index is discontinued, an equivalent index reported by a federal authority. If no such index is reported, the term means the substitute index chosen by the department of revenue; and

(b) "Reference base index" means the CPI for the calendar year 2010.

(2) The dollar amounts stated in sections 15-11-102, 15-11-202 (2), 15-11-403, and 15-11-405 apply to the estate of a decedent who died during or after 2010, but for the estate of a decedent who died after 2011, these dollar amounts must be increased or decreased if the CPI for the calendar year immediately preceding the year of death exceeds or is less than the reference base index. The amount of any increase or decrease is computed by multiplying each dollar amount by the percentage by which the CPI for the calendar year immediately preceding the year of death exceeds or is less than the reference base index. If the amount of the increase or decrease produced by the computation is not a multiple of one thousand dollars, then the amount of the increase or decrease is rounded down if it is an increase, or rounded up if it is a decrease, to the next multiple of one thousand dollars, but for the purpose of section 15-11-405, the periodic installment amount is the lump-sum amount divided by twelve. If the CPI for 2010 is changed by the bureau of labor statistics, the reference base index must be revised using the rebasing factor reported by the bureau of labor statistics, or other comparable data if a rebasing factor is not reported.

(3) Before February 1, 2012, and before February 1 of each succeeding year, the department of revenue shall publish a cumulative list, beginning with the dollar amounts effective for the estate of a decedent who died in 2012 of each dollar amount as increased or decreased under this section.