(a)Motion and opposition (1) Except as these rules provide otherwise, a party wanting to make a motion in a reviewing court must serve and file a written motion stating the grounds and the relief requested and identifying any documents on which the motion is based. (2) A motion must be accompanied by a memorandum and, if it is based on matters outside the record, by declarations or other supporting evidence. (3) Any opposition must be served and filed within 15 days after the motion is filed. (Subd