Member States shall take the necessary measures to ensure that effective and proportionate investigative tools are available for investigating or prosecuting the criminal offences referred to in this Directive. Where appropriate, those tools shall include special investigative tools, such as those used in countering organised crime or in other serious crime cases.
Text as published in the Official Journal, reproduced verbatim (including any typographical quirks of the source). For the authentic version, see EUR-Lex.