The inmate shall be given notice of the intent to revoke good time credits earned together with a statement of the grounds for the revocations, at a reasonable time, not less than 24 hours before discipline is imposed. The inmate shall have a personal appearance before a Disciplinary Review Board (DRB) and shall have the right to call witnesses, confront his accuser and present a defense. If the inmate is not competent or requests aid in preparing his case, the Lieutenant in charge of the Inmate Classification and Placement Detail shall represent him. The Unit Commander or his appointed representative shall present the case against the inmate.