Section 13
SEC. 13. Subsection (h) of section sixteen of Act Numbered Twenty-three hundred and seven is hereby amended to read as follows: "(h) When any public utility as herein defined proposes to increase or reduce any existing individual rates, joint rates, tolls, charges, or schedules thereof, as well as commutation, mileage, and other special rates, or change or alter any existing classification, it shall send written notice thereof to the Public Utility Commission thirty days prior to the date on which the proposed increase, reduction, change or alteration is to take effect, unless the Commission, by means of an order, consent to a shorter notice, and upon receipt of said notice, the Commission shall be authorized, either upon complaint in writing or by virtue of its office, to see and determine whether said increase, reduction, change or alteration is just and reasonable. The burden of proof to show that the said increase, reduction, change or alteration is just and reasonable shall be upon the public utility making the same. The Commission shall have power pending such hearing and determination to order the suspension of the said increase, reduction, change or alteration until the said Commission shall have approved said increase, reduction, change or alteration, not exceeding three months."