9Rules may make provision as to—
(a)the circumstances in which the Director may—
(i)impose conditions or obligations in relation to a parallel exemption,
(ii)vary or remove any such conditions or obligations,
(iii)impose additional conditions or obligations, or
(iv)cancel the exemption;
(b)as to the procedure to be followed by the Director if he is acting under section 10(5);
(c)the form and manner in which notice of a decision to take any of the steps in sub-paragraph (a) is to be given;
(d)the circumstances in which an exemption may be cancelled with retrospective effect.