1. If an on-site inspection provided for in Article 18 requires authorisation by a judicial authority in accordance with national law, the Authority shall apply for such an authorisation.
2. Where an authorisation as referred to in paragraph 1 is applied for, the national judicial authority shall control that the decision of the Authority 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 Authority for detailed explanations, in particular relating to the grounds the Authority has for suspecting that an infringement of the acts referred to in Article 1(2), first subparagraph 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
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