49 CFR §107.123

1. (a)An applicant for special permit, a special permit holder, or an applicant for party status to a special permit may request that the Associate Administrator reconsider a decision under § 107.113(g), § 107.117(e) or § 107.121(c) of this part. The request must—
   1. (1)Be in writing or by electronic means and filed within 20 days of receipt of the decision;
   2. (2)State in detail any alleged errors of fact and law;
   3. (3)Enclose any additional information needed to support the request to reconsider; and
   4. (4)State in detail the modification of the final decision sought.
2. (b)The Associate Administrator grants or denies, in whole or in part, the relief requested and informs the requesting person in writing or by electronic means of the decision. If necessary to avoid a risk of significant harm to persons or property, the Associate Administrator may, in the notification, declare the action immediately effective.