13 C.F.R. § 102.28
(b) Office responses. Within ten (10) days (excluding Saturdays, Sundays, and legal public holidays) of receiving a request for amendment or correction of records, an office shall send the requester a written acknowledgment of receipt, and the office shall notify the requester within 30 days (excluding Saturdays, Sundays, and legal public holidays) of receipt of the request whether it is granted or denied. If the Program/Support Office Head or designee grants the request in whole or in part, the amendment or correction must be made, and the requester advised of his or her right to obtain a copy of the corrected or amended record. If the office denies a request in whole or in part, it shall send the requester a letter signed by the Program/Support Office Head or designee that shall state:
(f) Records not subject to amendment or correction. The following records are not subject to amendment or correction: