D.C. Mun. Regs. r. 28-527
If a resident is placed in administrative segregation, that placement shall be reviewed at hearings held at thirty (30) day intervals.
At each thirty-day review, it shall be the responsibility of the Board to determine whether the resident's return to the general population at the time of that particular review still poses an escape risk or security risk to the resident or others.
In particular under § 527.2, the Board members shall determine whether other residents from whom the resident is to be separated are presently in the general population.
The resident shall have a right to be present, with a representative, at every third (3rd) review hearing (i.e., Every ninety (90) days). The resident may present evidence at that time.
At each thirty-day review hearing, the resident or the resident's counsel or substitute counsel may present in writing any new evidence for the consideration of the Board.
If after a thirty-day review hearing the Board determines that the resident should remain in segregation, it shall prepare a written statement of the reasons for its determination.
A copy of this written statement shall be furnished to the resident within one (1) week of the determination.
If the Board determines that there is no longer an escape risk, or a security risk to the resident or others, the resident shall be released from segregation.
D.C. Mun. Regs. r. 28-527