Section 19
SEC. 19. Section thirty of Act Numbered Twenty-three hundred and seven is hereby amended to read as follows: "SEC. 30. Upon the petition of the person or corporation interested, the Commissioner shall in any case decided by him order a rehearing, which shall be held before a Board composed of the Attorney-General or any person of his office whom he may designate, the Director of Public Works, and the Commissioner. The latter shall act as presiding officer of said Board, which may extend, revoke or modify any order made by the Commissioner. Such petition shall be filed within fifteen days after the day on which the order of the Public Utility Commissioner becomes effective."