6.—(1) The President or the Vice-President shall fix the date, time and place of the hearing of the appeal and the Secretary shall not less than 14 days (or such shorter time as may be agreed by him with the parties) before the date so fixed send to each party a notice of hearing together with information and guidance as to attendance at the hearing, witnesses and the bringing of documents (if any), representation by another person and written representations.
(2) Where the President or the Vice-President so directs, the Secretary shall also send notice of the hearing to such persons as may be directed, but the requirement as to the period of notice contained in paragraph (1) shall not apply to any such notice.
(3) The President or the Vice-President may, if he thinks fit, appoint in pursuance of Article 26(3) of the Order of 1978 a person or persons having special knowledge or experience in relation to the subject matter of the appeal to sit with the tribunal as assessor or assessors.