After section 259A--
insert--
'(1) This section applies if--
(a) a commissioner who holds, or held, an appointment as ombudsman has dealt with a matter while performing the functions of the office of ombudsman; and
(b) the matter is or has become a matter or proceeding before the commission.
'(2) The commissioner must not deal with the matter or proceeding.
'(3) The commissioner must inform the president why the commissioner is not dealing with the matter or proceeding.'.