VERIFIED PETITION OF INDIANA GAS COMPANY, INC. D/B/A VECTREN ENERGY DELIVERY OF INDIANA, INC. (“VECTREN NORTH”) FOR (1) AUTHORITY TO MODIFY ITS RATES AND CHARGES FOR GAS UTILITY SERVICE THROUGH A PHASE-IN OF RATES, (2) APPROVAL OF NEW SCHEDULES OF RATES AND CHARGES, AND NEW AND REVISED RIDERS, (3) APPROVAL OF A NEW TAX SAVINGS CREDIT RIDER, (4) APPROVAL OF VECTREN NORTH’S ENERGY EFFICIENCY PORTFOLIO OF PROGRAMS AND AUTHORITY TO EXTEND PETITIONER’S ENERGY EFFICIENCY RIDER (“EER”), INCLUDING THE DECOUPLING MECHANISM EFFECTUATED THROUGH THE EER, (5) APPROVAL OF REVISED DEPRECIATION RATES APPLICABLE TO GAS PLANT IN SERVICE, (6) APPROVAL OF NECESSARY AND APPROPRIATE ACCOUNTING RELIEF, AND (7) APPROVAL OF AN ALTERNATIVE REGULATORY PLAN PURSUANT TO WHICH VECTREN NORTH WOULD CONTINUE ITS CUSTOMER BILL ASSISTANCE PROGRAMS.