VERIFIED PETITION OF NORTHERN INDIANA PUBLIC SERVICE COMPANY FOR APPROVAL OF ITS PROPOSED 2019-2021 ENERGY EFFICIENCY PLAN FOR GAS SERVICE (OR ITS ALTERNATIVE PLAN) AND ASSOCIATED RATEMAKING AND ACCOUNTING TREATMENT, INCLUDING TIMELY RECOVERY THROUGH NIPSCO’S GDSM ADJUSTMENT MECHANISM OF ASSOCIATED COSTS (INCLUDING PROGRAM COSTS AND LOST REVENUES), FOR AUTHORITY TO DEFER PROGRAM COSTS, AND MODIFICATION OF RIDER 472 – GAS DEMAND SIDE MANAGEMENT (“GDSM”) RIDER. |