Which of the following is not one of the guidelines established by Wolff v. McDonnell?
The inmate must be given 24-hour written notice of the charges.
The prison must appoint counsel to represent the inmate in all proceedings.
The inmate is allowed to call witnesses and present documentary evidence in his or her defense so long as this does not jeopardize institutional safety and security.
The prison disciplinary board must be impartial.