10.—(1) At any time before an appeal is determined it may be withdrawn by the appellant either—
(a)at an oral hearing; or
(b)by giving notice in writing of withdrawal to the clerk to the appeal tribunal.
(2) If an appeal is withdrawn in accordance with paragraph (1)(a), the clerk to the appeal tribunal shall send a notice in writing to any party to the proceedings who is not present when the appeal is withdrawn informing him that the appeal has been withdrawn.
(3) If an appeal is withdrawn in accordance with paragraph (1)(b), the clerk to the appeal tribunal shall send a notice in writing to every party to the proceedings informing him that the appeal has been withdrawn.