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. La solicitud deberá contener los siguientes elementos o estar acompañada de, según proceda:
(e) Cualquier información que pueda ser necesaria conforme al derecho interno del Estado requerido para cumplir la solicitud; y