15.—(1) An adjudicator may, if he thinks fit—
(a)extend the time appointed by or under this Schedule for the doing of any act notwithstanding that the time appointed has expired;
(b)if an appellant at any time gives notice of the withdrawal of his appeal, dismiss the proceedings;
(c)if an enforcement authority consents to an appeal being allowed, allow the appeal;
(d)if both or all of the parties agree in writing on the terms of a decision to be made by an adjudicator, decide accordingly; or
(e)adjourn a hearing.
(2) An adjudicator may exercise the powers conferred by this Schedule (other than paragraph 12) on his own motion or on the application of a party.