For the purposes of this Title, the applicant shall be represented in the proceedings and assisted during the hearings by a lawyer chosen by him or, at his request, appointed by the court. If the application for review or reconsideration has not been declared manifestly inadmissible pursuant to the second paragraph of Article 624 and the applicant does not have a lawyer, the chairman of the investigating committee shall appoint one for the applicant ex officio. The victim may be represented in the proceedings and assisted during the hearings by a lawyer chosen by him or, at his request, appointed ex officio.