Rule 520 - General Authority of Appellate Courts(a) In any matter lawfully brought before it for review, the supreme court, upon motion and notice of a party or upon its own motion, may at any time modify or vacate any order made by a trial court or the court of appeals in relation to the prosecution of an appeal or a petition for review. (b) In any matter lawfully brought before it for review, the court of appeals may similarly modify or vacate any order made by a trial court in relation to the prosecution of an appeal or petition for review.(c) The appellate court may affirm, modify, vacate, set aside or reverse any judgment, decree, decision or order of a court lawfully brought before it for review, and may remand the cause and direct the entry of such appropriate judgment, decree or order; or require such further proceedings to be had as may be just under the circumstances.SCO 439 effective 11/15/1980