28 CFR § 543.12 - Retention of attorneys.
(a) The Warden shall allow an inmate to contact and retain attorneys. With the written consent of the inmate, staff may advise an attorney of the inmate's available funds. Staff may not interfere with selection and retention of attorneys if the inmate has attained majority and is mentally competent. If the inmate is a mental incompetent or a minor, the Warden shall refer to the inmate's guardian or to the appropriate court all matters concerning the retention and payment of attorneys.