Appeal procedures and time limits. A negative response may be appealed to the Department's Appeals Review Panel (ARP) and should be sent to: Chairman, Appeals Review Panel, c/o Director, Office of Information Programs and Services/Appeals Officer, at the IPS address given above. The appeal shall include a copy of the original challenge, the response, and any additional information the appellant believes would assist the ARP in reaching its decision. The ARP shall respond within 90 calendar days of receipt of the appeal. A negative decision by the ARP may be appealed to the Interagency Security Classification Appeals Panel (ISCAP) referenced in
section 5.3 of Executive Order 13526. If the Department fails to respond to a formal challenge within 120 calendar days or if the ARP fails to respond to an appeal within 90 calendar days, the challenge may be sent directly to the ISCAP.