Section 502.201 - Applicability and scope(a) The rules in this subpart apply to adjudicatory proceedings conducted under the statutes administered by the Commission involving matters which require determination after notice and opportunity for hearing. Adjudicatory proceedings are formal proceedings commenced upon the filing of a sworn complaint or by Order of the Commission. Such proceedings will be conducted pursuant to the Administrative Procedure Act, 5 U.S.C. 551 - 559 , and the rules in this subpart.(b) The term hearing means a formal adjudicatory proceeding in which evidence is presented orally, or through written statements, or by combination thereof. The term oral hearing means a hearing at which evidence is presented through oral testimony of a witness. [Rule 201].