28 CFR 541.50: Release from a control unit.

(a) Only the Executive Panel may release an inmate from a control unit. The following factors are considered in the evaluation of an inmate's readiness for release from a control unit:

(1) Relationship with other inmates and staff members, which demonstrates that the inmate is able to function in a less restrictive environment without posing a threat to others or to the orderly operation of the institution;

(2) Involvement in work and recreational activities and assignments;

(3) Adherence to institution guidelines and Bureau of Prisons rules and policy;

(4) Personal grooming and cleanliness; and

(5) Quarters sanitation.

(b) An inmate released from a control unit may be returned:

(1) To the institution from which the inmate was originally transferred;

(2) To another federal or non-federal institution; or

(3) Into the general population of the institution which has a control unit.