21.—(1) Subject to paragraph (2), the tribunal shall give the parties not less than 3 weeks' notice of the date, time and place of the hearing or such shorter notice to which the parties may consent.
(2) Unless both parties otherwise agree, the hearing shall not take place earlier than 3 weeks after the expiry of the period within which the prisoner may send written representations to the tribunal under rule 7.
(3) The tribunal may vary any notice given under paragraph (1) and shall give the parties not less than 7 days' (or such shorter time as the parties may agree) notice of any such variation;
Provided that any altered hearing date shall not (unless the parties agree) be before the date notified under paragraph (1).
(4) The tribunal may, from time to time, adjourn the hearing and–
(a)in the case where the date, time and place of the adjourned hearing are announced before the adjournment, no further notice shall be required; and
(b)in any other case, the tribunal shall give the parties not less than 7 days' (or such shorter time as the parties may agree) notice of the date, time and place of the adjourned hearing.