Part II Regional Instruments States Parties in matters of criminal investigation, request any other State Party to carry out, with its assistance and cooperation, on the latter's territory, criminal investigations related to any judicial proceedings concerning alleged terrorist acts and, in particular: (a) the examination of witnesses and transcripts of statements made as evidence; (b) the opening of judicial information; (c) the initiation of investigation processes; (d) the collection of documents and recordings or, in their absence, authenticated copies thereof; (e) conducting inspections and tracing of assets for evidentiary purposes; (f) executing searches and seizures; and (g) service of judicial documents. Article 15 A commission rogatoire may be refused: (a) where each of the States Parties has to execute a commission rogatoire relating to the same terrorist acts; (b) if that request may affect efforts to expose crimes, impede investigations or the indictment of the accused in the country requesting the commission rogatoire; or (c) if the execution of the request would affect the sovereignty of the requested State, its security or public order. Article 16 The extra-territorial investigation (commission rogatoire) shall be executed in compliance with the provisions of national laws of the requested State. The request for an extra-territorial investigation 216