1. If information is requested by a Member State in accordance with this Directive, the requested Member State shall use its measures aimed at gathering information to obtain the requested information, even though that Member State may not need such information for its own tax purposes. That obligation is without prejudice to paragraphs 2, 3 and 4 of Article 17, the invocation of which shall in no case be construed as permitting a requested Member State to decline to supply information solely because it has no domestic interest in such information.

2. In no case shall Article 17(2) and (4) be construed as permitting a requested authority of a Member State to decline to supply information solely because this information is held by a bank, other financial institution, nominee or person acting in an agency or a fiduciary capacity or because it relates to ownership interests in a person.

3. Notwithstanding paragraph 2, a Member State may refuse the transmission of requested information where such information concerns taxable periods prior to 1 January 2011 and where the transmission of such information could have been refused on the basis of Article 8(1) of Directive 77/799/EEC if it had been requested before 11 March 2011.

4. The competent authority of each Member State shall put in place an effective mechanism to ensure the use of information acquired through the reporting or the exchange of information under Articles 8 to 8ad.