Rome Statute of the International Criminal Court (d) 2. Shall not be subjected to arbitrary arrest or detention, and shall not be deprived of his or her liberty except on such grounds and in accordance with such procedures as are established in this Statute. Where there are grounds to believe that a person has committed a crime within the jurisdiction of the Court and that person is about to be questioned either by the Prosecutor, or by national authorities pursuant to a request made under Part 9, that person shall also have the following rights of which he or she shall be informed prior to being questioned: (a) To be informed, prior to being questioned, that there are grounds to believe that he or she has committed a crime within the jurisdiction of the Court; (b) To remain silent, without such silence being a consideration in the determination of guilt or innocence; (c) To have legal assistance of the person's choosing, or, if the person does not have legal assistance, to have legal assistance assigned to him or her, in any case where the interests of justice so require, and without payment by the person in any such case if the person does not have sufficient means to pay for it; and (d) To be questioned in the presence of counsel unless the person has voluntarily waived his or her right to counsel. Article 56 Role of the Pre-Trial Chamber in relation to a unique investigative opportunity 1. 2. (a) Where the Prosecutor considers an investigation to present a unique opportunity to take testimony or a statement from a witness or to examine, collect or test evidence, which may not be available subsequently for the purposes of a trial, the Prosecutor shall so inform the Pre-Trial Chamber. (b) In that case, the Pre-Trial Chamber may, upon request of the Prosecutor, take such measures as may be necessary to ensure the efficiency and integrity of the proceedings and, in particular, to protect the rights of the defence. (c) Unless the Pre-Trial Chamber orders otherwise, the Prosecutor shall provide the relevant information to the person who has been arrested or appeared in response to a summons in connection with the investigation referred to in subparagraph (a), in order that he or she may be heard on the matter. The measures referred to in paragraph 1 (b) may include: (a) Making recommendations or orders regarding procedures to be followed; (b) Directing that a record be made of the proceedings; (c) Appointing an expert to assist; (d) Authorizing counsel for a person who has been arrested, or appeared before the Court in response to a summons, to participate, or where there has not yet been such an arrest or appearance or counsel has not been designated, appointing another counsel to attend and represent the interests of the defence; (e) Naming one of its members or, if necessary, another available judge of the Pre-Trial or Trial Division to observe and make recommendations or orders regarding the collection and preservation of evidence and the questioning of persons; 35