Ind. Code § 36-8-8-15
Each year the system board shall determine if there has been an increase or decrease in the consumer price index (United States city average) prepared by the United States Department of Labor by comparing the arithmetic mean of the consumer price index for January, February, and March of that year with the arithmetic mean for the same three (3) months of the preceding year. If there has been an increase, or a decrease, it shall be stated as a percentage of the arithmetic mean for the preceding three (3) month period. The percentage shall be rounded to the nearest one-tenth of one percent (0.1%) and may not exceed three percent (3%). If there is a percentage increase of the arithmetic mean for the preceding three (3) month period, a fund member's or survivor's monthly benefit, beginning with the July payment, shall be increased by an amount equal to the June payment times the percentage increase. However, a fund member's or survivor's monthly benefit may not be increased under this section until July of the year following the year of the first monthly benefit payment to the fund member or survivor. In computing a fund member's benefit, the increase is based only on those years for which the fund member was eligible for benefit payments under this chapter. A monthly benefit may not be reduced if there is a percentage decrease of the arithmetic mean for the preceding three (3) month period.
IC 36-8-8-15
Pre-Local Government Recodification Citations: 19-1-17.8-13; 19-1-36.5-13.