13(1)The incumbent concerned shall be entitled to appear before, and to be heard by, the committee or tribunal, to give oral evidence in the proceedings on the enquiry and to call witnesses.
(2)The committee or tribunal—
(a)shall, at the written request of any other party to the proceedings on the enquiry, invite any person named in the request to address it or give oral evidence in those proceedings or both; and
(b)may invite any other person who may in its opinion be able to assist it to address it or give such evidence or both.
(3)The tribunal may require oral evidence by any person in such proceedings to be given on oath and for that purpose the chairman of the tribunal may administer oaths.
(4)The incumbent concerned shall be entitled to attend any meeting of the committee or tribunal at which any other person is to give evidence to, or be heard by, the committee or tribunal and, unless represented by counsel or a solicitor, to put questions to that person.