28 C.F.R. § 541.61 Standard for placement in controlled housing status.
Title 28 - Judicial Administration
An inmate may be placed in a controlled housing status when there is reliable evidence causing staff to believe that the inmate engages in conduct posing a health risk to others. This evidence may be the inmate's behavior, or statements of the inmate, or other reliable evidence.
Title 28: Judicial Administration
PART 541—INMATE DISCIPLINE AND SPECIAL HOUSING UNITS
Subpart E—Procedures for Handling of HIV Positive Inmates Who Pose Danger to Others
§ 541.61 Standard for placement in controlled housing status.