Ind. Code § 4-22-2.3-7

Sec. 7. The Indiana utility regulatory commission may adopt interim rules under the interim rule procedures in IC 4-22-2-37.2 pursuant to its authority under IC 8-1-1-3(g) or IC 8-1-2-113. A rule described in this section expires not later than two (2) years after the rule is accepted for filing by the publisher of the Indiana Register and may not be continued in another interim rule.