(a)Parties' briefs; time to file (1) Within 30 days after the Supreme Court files the order of review, the petitioner must serve and file in that court either an opening brief on the merits or the brief it filed in the Court of Appeal. (2) Within 30 days after the petitioner files its brief or the time to do so expires, the opposing party must serve and file either an answer brief on the merits or the brief it filed in the Court of Appeal. (3) The petitioner may file a reply brief on the merits or