Chapter I General Provisions
Article 2 (Restrictions on Assistance)
(iii) With respect to a request for examination of a witness or provision of articles of evidence, unless otherwise provided by a treaty, when the requesting country does not clearly demonstrate in writing that the evidence is essential to the investigation.
Chapter II Collection of Evidence
Article 11 (Request for Issuance of a Warrant)
A request for issuance of a warrant or examination of a witness shall be accompanied with the document set forth in item (iii) of Article 2; except that this shall not apply when a treaty provides otherwise.
2. The request shall, as applicable, contain or be supported by the following:
(e) Such information as may be required under the law of the requested State in order to execute the request; and