Tariff Changes Require Thirty (30) Days Notice To The Commission

(1) Except as hereinafter provided all tariffs, rate schedules or supplements thereto containing any change in rates, tolls, charges or rules and regulations must be filed with the Commission at least thirty (30) days before the effective date of such changes, unless upon application and for good cause shown the Commission may waive the thirty (30) day time limit or any portion thereof.