Ind. Code § 5-10.4-5-16
The computation of benefits described in section 2 of this chapter applies to benefits payable on and after July 1, 1975, and includes benefits payable to members who retired or whose employment was terminated before that date. However, a member's benefits may not be reduced below the amount paid to the member before July 1, 1975. The benefits for a member who retired before January 1, 1956, shall be computed by multiplying fifteen dollars ($15) by the member's years of service and then actuarially adjusting the product obtained to take into account a member's early retirement and the retirement option selected by a member using the factors in effect on July 1, 1975.
IC 5-10.4-5-16
Pre-2006 Education Finance Recodification Citation: 21-6.1-5-19(b).