In the order upon reopening, the presiding officer may deny the petition for reopening, if any, in accordance with § 4.774(b) or affirm, modify, or vacate the final decision; and must:

(a) Set forth the reasons for doing so; and

(b) Include a notice stating that any party in interest who is adversely affected by the order upon reopening, as well as the Project Director, have the right to appeal the order to the Board within 30 days of the date of issuance of the order.