Where:
(a) the Tribunal dismisses an appeal against a conviction or an application for leave to appeal against a conviction; and
(b) it appears to the Tribunal that the appeal or application was frivolous or vexatious;
the Tribunal may order that any punishment of imprisonment or detention imposed on the appellant or applicant in the proceedings in relation to which the appeal or application was brought shall be taken to commence on the day on which the Tribunal dismisses the appeal or application.