28 CFR 541.26 - Review of placement in the SHU.
Your placement in the SHU will be reviewed by the Segregation Review Official (SRO) as follows:
(a) Three day review. Within three work days of your placement in administrative detention status, not counting the day you were admitted, weekends, and holidays, the SRO will review the supporting records. If you are in disciplinary segregation status, this review will not occur.
(b) Seven day reviews. Within seven continuous calendar days of your placement in either administrative detention or disciplinary segregation status, the SRO will formally review your status at a hearing you can attend. Subsequent reviews of your records will be performed in your absence by the SRO every seven continuous calendar days thereafter.
(c) Thirty day reviews. After every 30 calendar days of continuous placement in either administrative detention or disciplinary segregation status, the SRO will formally review your status at a hearing you can attend.
(d) Administrative remedy program. You can submit a formal grievance challenging your placement in the SHU through the Administrative Remedy Program, 28 CFR part 542, subpart B.