Rome Statute of the International Criminal Court circumstances shall a judge who has participated in the pre-trial phase of a case be eligible to sit on the Trial Chamber hearing that case. Article 40 Independence of the judges 1. The judges shall be independent in the performance of their functions. 2. Judges shall not engage in any activity which is likely to interfere with their judicial functions or to affect confidence in their independence. 3. Judges required to serve on a full-time basis at the seat of the Court shall not engage in any other occupation of a professional nature. 4. Any question regarding the application of paragraphs 2 and 3 shall be decided by an absolute majority of the judges. Where any such question concerns an individual judge, that judge shall not take part in the decision. Article 41 Excusing and disqualification of judges 1. The Presidency may, at the request of a judge, excuse that judge from the exercise of a function under this Statute, in accordance with the Rules of Procedure and Evidence. 2. (a) A judge shall not participate in any case in which his or her impartiality might reasonably be doubted on any ground. A judge shall be disqualified from a case in accordance with this paragraph if, inter alia, that judge has previously been involved in any capacity in that case before the Court or in a related criminal case at the national level involving the person being investigated or prosecuted. A judge shall also be disqualified on such other grounds as may be provided for in the Rules of Procedure and Evidence. (b) The Prosecutor or the person being investigated or prosecuted may request the disqualification of a judge under this paragraph. (c) Any question as to the disqualification of a judge shall be decided by an absolute majority of the judges. The challenged judge shall be entitled to present his or her comments on the matter, but shall not take part in the decision. Article 42 The Office of the Prosecutor 1. The Office of the Prosecutor shall act independently as a separate organ of the Court. It shall be responsible for receiving referrals and any substantiated information on crimes within the jurisdiction of the Court, for examining them and for conducting investigations and prosecutions before the Court. A member of the Office shall not seek or act on instructions from any external source. 2. The Office shall be headed by the Prosecutor. The Prosecutor shall have full authority over the management and administration of the Office, including the staff, facilities and other resources thereof. The Prosecutor shall be assisted by one or more Deputy Prosecutors, who shall be entitled to carry out any of the acts required of the Prosecutor under this Statute. The Prosecutor and the Deputy Prosecutors shall be of different nationalities. They shall serve on a full-time basis. 27