(1) Where, by virtue of a provision of this Act, a court may give any leave, permission or direction, the leave, permission or direction may be given on such terms as the court thinks fit.
(2) In determining whether to give the leave, permission or direction, the matters that the court shall take into account include—
(a) the extent to which to do so would be likely to add unduly to, or to shorten, the length of the hearing;
(b) the extent to which to do so would be unfair to a party or to a witness;
(c) the importance of the evidence in relation to which the leave or permission is sought;
(d) the nature of the proceeding; and
(e) the powers, if any, of the court to adjourn the hearing or to make some other order or to give a direction in relation to the evidence.