28 CFR §541.68

1. (a)Only the Regional Director may release an inmate from controlled housing status. The following factors are considered in the evaluation of an inmate's readiness for return to the general population:
   1. (1)Relationship with other inmates and staff members, which demonstrate that the inmate is able to function in a less restrictive environment without posing a health threat to others or to the orderly operation of the institution;
   2. (2)Involvement in work and recreational activities and assignments or other programs; and
   3. (3)Adherence to institution guidelines and Bureau of Prisons rules and policy.
2. (b)An inmate released from a controlled housing status may be returned to the general population of that institution, or to another federal or non-federal institution.