(a)Power to order rehearing (1) On petition of a party or on its own motion, a reviewing court may order rehearing of any decision that is not final in that court on filing. (2) An order for rehearing must be filed before the decision is final. If the clerk's office is closed on the date of finality, the court may file the order on the next day the clerk's office is open. (b)Petition and answer (1) A party may serve and file a petition for rehearing within 15 days after: (A) The filing of the decision;