Prosecutor
1. The Prosecutor may initiate investigations proprio motu on the basis of information on crimes within the jurisdiction of the Court.
2. The Prosecutor shall analyse the seriousness of the information received. For this purpose, he or she may seek additional information from States, organs of the United Nations, intergovernmental or non-governmental organizations, or other reliable sources that he or she deems appropriate, and may receive written or oral testimony at the seat of the Court.
3. If the Prosecutor concludes that there is a reasonable basis to proceed with an investigation, he or she shall submit to the Pre-Trial Chamber a request for authorization of an investigation, together with any supporting material collected. Victims may make representations to the Pre-Trial Chamber, in accordance with the Rules of Procedure and Evidence.
4. If the Pre-Trial Chamber, upon examination of the request and the supporting material, considers that there is a reasonable basis to proceed with an investigation, and that the case appears to fall within the jurisdiction of the Court, it shall authorize the commencement of the investigation, without prejudice to subsequent determinations by the Court with regard to the jurisdiction and admissibility of a case.
5. The refusal of the Pre-Trial Chamber to authorize the investigation shall not preclude the presentation of a subsequent request by the Prosecutor based on new facts or evidence regarding the same situation.
6. If, after the preliminary examination referred to in paragraphs 1 and 2, the Prosecutor concludes that the information provided does not constitute a reasonable basis for an investigation, he or she shall inform those who provided the information. This shall not preclude the Prosecutor from considering further information submitted to him or her regarding the same situation in the light of new facts or evidence.
 Source: ROME STATUTE OF THE INTERNATIONAL CRIMINAL COURT