Chapter I General Provisions
(Restrictions on Assistance)
Article 2
Assistance shall not be provided in any of the following circumstances: -
(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.
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