32 C.F.R. § 2102.15
(c) To the extent possible, every request for amendment of a record will be answered within ten working days (excluding Saturdays, Sundays, and legal Federal holidays) of the receipt of the request. In the event that a response cannot be made within this time, the requestor will be notified by mail of the reasons for the delay and the date upon which a reply can be expected. A final response to a request for amendment will include the NSC Staff determination on whether to grant or deny the request. If the request is denied, the response will include: