Ind. Code § 5-10.1-4-1
The governor may conduct separate referenda for each of the following retirement systems to determine whether the positions covered by the systems will be included in the agreement:
(4) each other retirement system which is financially supported by a political subdivision if the board or governing body administering the retirement system requests a referendum.
As added by Acts 1977, P.L.53, SEC.1. Amended by P.L.2-2007, SEC.88.