=11.= (1) An appellant, notwithstanding that he is in custody, shall be entitled to be present, if he desires it, on the hearing of his appeal, except where the appeal is on some ground involving a question of law alone, but, in that case and on an application for leave to appeal and on any proceedings preliminary or incidental to an appeal, shall not be entitled to be present, except where rules of court provide that he shall have the right to be present, or where the court gives him leave to be present. (2) The power of the court to pass any sentence under this Act may be exercised notwithstanding that the appellant is for any reason not present. =12.= It shall be the duty of the Director of Public Prosecutions to appear for the Crown on every appeal to the Court of Criminal Appeal under this Act, except so far as the solicitor of a Government department, or a private prosecutor in the case of a private prosecution, undertakes the defence of the appeal, and the Prosecution of Offences Act, 1879, shall apply as though the duty of the Director of Public Prosecutions under this section were a duty under section two of that Act, and provision shall be made by rules of court for the transmission to the Director of Public Prosecutions of all such documents, exhibits, and other things connected with the proceedings as he may require for the purpose of his duties under this section. =13.= (1) On the hearing and determination of an appeal or any proceedings preliminary or incidental thereto under this Act no costs shall be allowed on either side. (2) The expenses of any solicitor or counsel assigned to an appellant under this Act, and the expenses of any witnesses attending on the order of the court or examined in any proceedings incidental to the appeal, and of the appearance of an appellant on the hearing of his appeal or on any proceedings preliminary or incidental to the appeal, and all expenses of and incidental to any examination of witnesses conducted by any person appointed by the court for the purpose, or any reference of a question to a special commissioner appointed by the court, or of any person appointed as assessor to the court, shall be defrayed, up to an amount allowed by the court, but subject to any regulations as to rates and scales of payment made by the Secretary of State, in the same manner as the expenses of a prosecution in cases of felony. =14.= (1) An appellant who is not admitted to bail shall, pending the determination of his appeal, be treated in such manner as may be directed by prison rules within the meaning of the Prison Act, 1898. (2) The Court of Criminal Appeal may, if it seems fit, on the application of an appellant, admit the appellant to bail pending the determination of his appeal.