278.192 Test period for proposed rate increase. (1) For the purpose of justifying the reasonableness of a proposed general increase in rates, the commission shall allow a utility to utilize either an historical test period of twelve (12) consecutive calendar months, or a forward-looking test period corresponding to the first twelve (12) consecutive calendar months the proposed increase would be in effect after the maximum suspension provided in KRS 278.190(2). (2) (a) Any application utilizing a forward-looking test period shall include a base period to be filed with the application, which begins not more than nine (9) months prior to the date of filing, consisting of not less than six (6) months of actual historical data and not more than six (6) months of estimated data at the time of filing. (b) Actual results for the estimated months of the base period shall be filed no later than forty-five (45) days after the last day of the base period. (c) Upon the filing of an application for a proposed increase in rates based on either a historical or a forward-looking test period, any intervening party in opposition to such application shall have the right to examine all data, including individual invoices, which comprise the actual expenditures of the utility incurred for ratemaking purposes for the preceding twelve (12) month period immediately prior to the filing date. Effective: July 14, 1992 History: Created 1992 Ky. Acts ch. 308, sec. 1, effective July 14, 1992.