|(a) Notice in Original or Appellate Jurisdiction Proceedings. In any proceeding, other than a petition for rulemaking, invoking the commission's original or appellate jurisdiction, the commission shall provide notice in accordance with APA in addition to any other notice required by law. Ten days notice shall be given of the initial prehearing conference in a proceeding. After the initial prehearing conference, reasonable notice of subsequent prehearing conferences may be provided on the record in a prehearing conference or by written notice to the parties. (b) Notice in Rulemaking Proceedings. The commission shall provide notice of the proposed adoption of any rule pursuant to APA, §§2001.021-2001.037.