(a) Any party aggrieved by the presiding officer's decision may file an appeal in the presiding officer's docket. The appeal must be filed within 35 days of issuance of the decision. A copy of the appeal shall be served on each party. The appeal shall set forth objections to the presiding officer's decision, supported by reference to applicable laws and regulations and with specific reference to the record. If no appeal is timely filed, the presiding officer's decision constitutes final agency action.

(b) A party may file a reply to the appeal within 25 days of service of the appeal. The reply shall be supported by reference to applicable laws and regulations and with specific reference to the record, if the party relies on evidence contained in the record.

(c) The Administrator may extend the period for filing an appeal or a reply for good cause shown, provided that the written request for extension is served before expiration of the applicable period provided in this section.

(d) The Administrator has sole discretion to permit oral argument on the appeal. On the Administrator's own initiative or written motion by any party, the Administrator may grant the parties an opportunity for oral argument.

(e) The Administrator may remand, vacate, affirm, reverse, alter, or modify the decision of the presiding officer and the Administrator's decision constitutes final agency action except where the terms of the Administrator's decision (for example, remanding a case to the presiding officer) show that the parties' administrative remedies have not been exhausted.

(f) An appeal from a Board decision pursuant to § 246.403(e) must be filed in the Board's docket within 35 days of issuance of the decision. A copy of the appeal shall be served on each party. The Administrator may affirm or vacate the Board's decision, and may remand the petition to the Board for further proceedings. An Administrator's decision to affirm the Board's decision constitutes final agency action.