The Public Utility Commission may at any time, upon notice to the public utility or telecommunications utility and after opportunity to be heard as provided in ORS 756.500 (Complaint) to 756.610 (Judicial review), rescind, suspend or amend any order made by the commission. Copies of the same shall be served and take effect as provided in ORS 756.558 (Taking of evidence) for original orders. [Formerly 757.540; 1973 c.776 §30; 1987 c.447 §92a; 1995 c.733 §70]