Under the Convention of 29 May 2000 on Mutual Assistance in Criminal Matters between the Member States of the European Union - the documents shall be drawn up in Lithuanian or if the authority by which the procedural document was issued knows that the addressee understands only some other language, the document, or at least the important passages thereof, must be translated into that other language. Under the European Convention on Mutual Assistance in Criminal Matters of 20 April 1959 requests and annexed documents shall be addressed to in Lithuanian or accompanied by a translation into one of the official languages of the Council of Europe (i.e. English or French).