1.   If an on-site inspection provided for in Article 12(1) and (2) or the assistance provided for in Article 12(5) requires authorisation by a judicial authority according to national rules, such authorisation shall be applied for.

2.   Where authorisation as referred to in paragraph 1 of this Article is applied for, the national judicial authority shall control that the decision of the ECB is authentic and that the coercive measures envisaged are neither arbitrary nor excessive having regard to the subject matter of the inspection. In its control of the proportionality of the coercive measures, the national judicial authority may ask the ECB for detailed explanations, in particular relating to the grounds the ECB has for suspecting that an infringement of the acts referred to in the first subparagraph of Article 4(3) has taken place and the seriousness of the suspected infringement and the nature of the involvement of the person subject to the coercive measures. However, the national judicial authority shall not review the necessity for the inspection or demand to be provided with the information on the ECB’s file. The lawfulness of the ECB’s decision shall be subject to review only by the CJEU.