The criminal appeals chamber is composed of a chamber president and two councillors. The functions of the public prosecutor are performed by the public prosecutor or by one of his advocates general or his substitutes; those of the registry by a registrar of the court of appeal.
However, where the contested judgment has been delivered in accordance with the procedures provided for in the third paragraph of Article 398 or in accordance with those set out in the penultimate paragraph of article 464, the Criminal Appeals Chamber shall be composed of a single magistrate exercising the powers conferred on the President of the Chamber, unless the accused is in pre-trial detention for the acts of which he or she is accused or if [Provisions declared to be unconstitutional by Constitutional Council Decision no. 2019-778 DC of 21 March 2019] the appellant expressly requests that the case be heard by a panel; this request may be made within a period of one month from the date of the appeal declaration. The Criminal Appeals Chamber thus composed may not then impose a firm prison sentence of more than five years. It may, however, if such referral appears justified due to the complexity of the facts or due to the size of the sentence likely to be handed down, decide, of its own motion or at the request of the parties or the public prosecutor, to refer the case to the criminal appeals chamber sitting as a panel.