In this Order—
"chairman" means—
(a) in the case of a body which may reserve a question of law, the presiding member of that body;
(b) in the case where a person alone may reserve a question of law, that person;
"recording officer" means the registrar, secretary or other person who performs the duties of a registrar for the tribunal;
"special case" includes case stated;
"tribunal" means the person who or body which may reserve a question of law.