12.—(1) Where an appeal has not been dismissed under rule 11, the chair shall determine whether the appeal should be dealt with at a hearing.
(2) The chair may determine that the appeal shall be dealt with without a hearing, but only if the appellant has so consented.
(3) Where the appeal is to be dealt with at a hearing, rules 13 to 21 shall apply and the chair shall give the appellant and the respondent his name and contact address.