6 C.F.R. § 5.26
(b) Component responses. Within ten working days of receiving your request for amendment or correction of records, a component shall send you a written acknowledgment of its receipt of your request, and it shall promptly notify you whether your request is granted or denied. If the component grants your request in whole or in part, it shall describe the amendment or correction made and shall advise you of your right to obtain a copy of the corrected or amended record, in disclosable form. If the component denies your request in whole or in part, it shall send you a letter signed by the head of the component, or the component head's designee, that shall state:
(f) Records not subject to amendment or correction. The following records are not subject to amendment or correction: