Ind. Code § 5-10.2-2-9
(c) The actuarial investigation must include in the determination of the liability and the rates of contribution the amount necessary to fully fund past and estimated future cost of living increases for members of the public employees' retirement fund amortized over a term determined by the board that does not exceed thirty (30) years.
As added by Acts 1977, P.L.53, SEC.2. Amended by P.L.54-1993, SEC.9; P.L.246-2005, SEC.48; P.L.111-2015, SEC.2.