Section 89. Rehearing before commissioner

After an order has been made by
  the commissioner any corporation or person interested therein shall have
  the right to apply for a rehearing in respect to any  matter  determined
  therein,  but any such application must be made within thirty days after
  the service of such order, unless the commissioner for good cause  shown
  shall otherwise direct; and the commissioner shall grant and hold such a
  rehearing  if  in  his  judgment  sufficient  reason therefor be made to
  appear. The decision  of  the  commissioner  granting  or  refusing  the
  application  for  a rehearing shall be made within thirty days after the
  making of such application. If a rehearing shall be  granted,  the  same
  shall  be  determined  by  the commissioner within thirty days after the
  same shall be finally submitted.  An application for  such  a  rehearing
  shall  not  excuse  any  corporation  or  person  from complying with or
  obeying any order or any requirement of any order of  the  commissioner,
  or  operate  in  any  manner to stay or postpone the enforcement thereof
  except as the commissioner may by order direct. If, after such rehearing
  and a consideration of the facts,  including  those  arising  since  the
  making  of  the order, the commissioner shall be of the opinion that the
  original order  or  any  part  thereof  is  in  any  respect  unjust  or
  unwarranted,  or  should  be  changed,  the commissioner may abrogate or
  change the same. An order made after any such  rehearing  abrogating  or
  changing  the  original order shall have the same force and effect as an
  original order but shall not affect any right or the enforcement of  any
  right arising from or by virtue of the original order.