49 C.F.R. § 801.22
Requesters seeking an appeal of the FOIA Officer's initial determination must send a written appeal to the NTSB's Managing Director within 90 calendar days. The NTSB's Managing Director will determine whether to grant or deny any appeal within 20 days (excluding Saturdays, Sundays, and legal public holidays) after receipt of such appeal, except that this time limit may be extended by as many as 10 additional days (excluding Saturdays, Sundays, and legal public holidays), in accordance with § 801.23 . The final determination will notify the requester of the statutory right to seek judicial review of the determination pursuant to 5 U.S.C. 552(a)(4)(B) , and will inform the requester of the dispute resolution services offered by OGIS.
49 C.F.R. §801.22