Except where otherwise provided in this Part of this Act, any application to the High Court may be made by the appellant or respondent as the case may be or by counsel on his behalf, orally or in writing, but in regard to such applications if the appellant is unrepresented and is in custody and is not entitled or has not obtained leave to be present before the court, he shall make any such application by forwarding the same in writing to the Clerk of Justiciary who shall take the proper steps to obtain the decision of the court thereon.