Indiana Code Title 8. Utilities and Transportation § 8-1-2-42.5

Sec. 42.5. (a) The commission shall by rule or order, consistent with the resources of the commission and the office of the utility consumer counselor, require that the basic rates and charges of all public, municipally owned, and cooperatively owned utilities (except those utilities described in section 61.5 of this chapter) are subject to a regularly scheduled periodic review and revision by the commission.  However, the commission shall conduct the periodic review at least once every four (4) years and may not authorize a filing for an increase in basic rates and charges more frequently than is permitted by operation of section 42(a) of this chapter.

(b) The commission shall make the results of the commission's most recent periodic review of the basic rates and charges of an electricity supplier (as defined in IC 8-1-2.3-2(b)) available for public inspection by posting a summary of the results on the commission's website.  If an electricity supplier whose basic rates and charges are reviewed under this section maintains a publicly accessible website, the electricity supplier shall provide a link on the electricity supplier's website to the summary of the results posted on the commission's website.