1. If an on-site inspection provided for in Article 36(1) and (2) or the assistance provided for in Article 36(5) requires authorisation by a judicial authority in accordance with 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 Board is authentic and that the coercive measures envisaged are neither arbitrary nor excessive, taking into account the subject matter of the inspection. In its control of the proportionality of the coercive measures, the national judicial authority may ask the Board for detailed explanations, in particular relating to the grounds the Board has for suspecting that an infringement of the decisions referred to in Article 29 has taken place, 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 Board's file. The lawfulness of the Board's decision shall be subject to review only by the Court of Justice.