28 C.F.R. § 802.6
(5)
(i) Requests by offender/defendant for offender's records.
(ii) Requests for offender records on behalf of an offender/defendant.
(b) Release determination—(1) Notification. You will be notified of the decision on the request within twenty (20) days after its receipt (excluding Saturdays, Sundays, and legal public holidays).
(i) The twenty (20) day period shall be tolled if:
(ii) The twenty (20) day period shall be extended for ten (10) additional working days with written notice to the requester for unusual circumstances.
(A) Unusual circumstances means, but only to the extent reasonably necessary to the proper processing of particular requests—
(1) The need to search for and collect the requested records from field facilities or other establishments that are separate from the office processing the request;
(2) The need to search for, collect, and appropriately examine a voluminous amount of separate and distinct records which are demanded in a single request; or
(3) The need for consultation, which shall be conducted with all practicable speed, with another agency having a substantial interest in the determination of the request or among two or more components of the agency having substantial subject-matter interest therein.
(B) The written notice to the requester for unusual circumstances shall:
(1) Notify the person making the request if the request cannot be processed within the time limit specified;
(2) Provide the person an opportunity to limit the scope of the request so that it may be processed within that time limit or an opportunity to arrange with the agency an alternative time frame for processing the request or a modified request;
(3) Make available the Agency's FOIA Public Liaison Officer, who shall assist in the resolution of any disputes between the requester the Agency; and
(4) Notify the requester of the right of the requester to seek dispute resolution services from the Office of Government Information Services.
(iii) When the Agency fails to comply with the applicable time limit provisions of paragraph (b) of this section, if the Agency can show exceptional circumstances exist and that the Agency is exercising due diligence in responding to the request, the Agency may be allowed additional time to complete its review of the records.
(2) Denial in whole or in part. If it is determined that the request for records should be denied in whole or in part, the requester shall be notified by mail with a letter stating the basis for partial or whole denial. The letter of notification shall:
(ii) State the exemptions relied on to not release the information;
(v) An agency shall—
(A) Withhold information under this section only if—
(1) The agency reasonably foresees that disclosure would harm an interest protected by an exemption described in paragraph (b) of this section; or
(2) Disclosure is prohibited by law; and
(B) Partially withhold information under this section only if—
(1) Partial disclosure of information is possible whenever the agency determines that a full disclosure of a requested record is not possible; and
(2) Take reasonable steps necessary to segregate and release nonexempt information; and
(c) Administrative appeal.
(1) A requester may appeal an initial determination when: