The individual in international law — Extradition — Conditions of — Requirement of double criminality — To be determined at date of request for and decision on extradition and not at time of commission of alleged offence — European Convention on Extradition, 1957, Article 2 — Requirement that prosecution for same offence in requested State not barred by prescription — Whether to be determined on same basis — Dutch Extradition Act, Article 9(1)(e) — The law of the Netherlands