28 CFR 540.102: Monitoring of inmate telephone calls.

The Warden shall establish procedures that enable monitoring of telephone conversations on any telephone located within the institution, said monitoring to be done to preserve the security and orderly management of the institution and to protect the public. The Warden must provide notice to the inmate of the potential for monitoring. Staff may not monitor an inmate's properly placed call to an attorney. The Warden shall notify an inmate of the proper procedures to have an unmonitored telephone conversation with an attorney.