Artikel 4

1. A request for information shall state the judicial authority from which it emanates as well as the nature of the case. It shall specify as exactly as possible the questions on which information concerning the law of the requested State is desired, and where there is more than one legal system in the requested State, the system of the law on which information is requested.
2. The request shall also state the facts necessary both for its proper understanding and for the formulation of an exact and precise reply. Copies of documents may be attached where necessary to clarify the scope of the request.
3. The request may include questions in fields other than those referred to in Article 1, paragraph (1) where they relate to the principal questions specified in the request.
4. Where a request is not drawn up by a judicial authority it shall be accompanied by the decision of that authority authorising it.