CHAPTER IV – IMPLEMENTATION, COOPERATION, PENALTIES AND ENFORCEMENT Article 49 – Competent authorities and Digital Services Coordinators Article 50 – Requirements for Digital Services Coordinators Article 51 – Powers of Digital Services Coordinators Article 52 – Penalties Article 53 – Right to lodge a complaint Article 54 – Compensation Article 55 – Activity reports Article 56 – Competences Article 57 – Mutual assistance Article 58 – Cross-border cooperation among Digital Services Coordinators Article 59 – Referral to the Commission Article 60 – Joint investigations Article 61 – European Board for Digital Services Article 62 – Structure of the Board Article 63 – Tasks of the Board Article 64 – Development of expertise and capabilities Article 65 – Enforcement of obligations of providers of very large online platforms and of very large online search engines Article 66 – Initiation of proceedings by the Commission and cooperation in investigation Article 67 – Requests for information Article 68 – Power to take interviews and statements Article 69 – Power to conduct inspections Article 70 – Interim measures Article 71 – Commitments Article 72 – Monitoring actions Article 73 – Non-compliance Article 74 – Fines Article 75 – Enhanced supervision of remedies to address infringements of obligations laid down in Section 5 of Chapter III Article 76 – Periodic penalty payments Article 77 – Limitation period for the imposition of penalties Article 78 – Limitation period for the enforcement of penalties Article 79 – Right to be heard and access to the file Article 80 – Publication of decisions Article 81 – Review by the Court of Justice of the European Union Article 82 – Requests for access restrictions and cooperation with national courts Article 83 – Implementing acts relating to Commission intervention Article 84 – Professional secrecy Article 85 – Information sharing system Article 86 – Representation Article 87 – Exercise of the delegation Article 88 – Committee procedure