9. The Commission shall adopt implementing acts laying down detailed rules on the verification of the output data, the appropriate frequency of that verification and the related proof of compliance. Those rules shall include provisions related to the evidence referred to in Article 10(5) and the communication rights related to the use of primary data referred to in Article 10(4). In laying down those rules, the Commission shall take due account of objective criteria, including the nature and scale of the transport service concerned, the relative risk of non-compliance, and the necessity of avoiding disproportionate administrative burdens. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 18(2).