Given the potential significant societal effects of an infringement of the additional obligations to manage systemic risks that solely apply to very large online platforms and very large online search engines and in order to address those public policy concerns, it is necessary to provide for a system of enhanced supervision of any action undertaken to effectively terminate and remedy infringements of this Regulation. Therefore, once an infringement of one of the provisions of this Regulation that solely apply to very large online platforms or very large online search engines has been ascertained and, where necessary, sanctioned, the Commission should request the provider of such platform or of such search engine to draw a detailed action plan to remedy any effect of the infringement for the future and communicate such action plan within a timeline set by the Commission, to the Digital Services Coordinators, the Commission and the Board. The Commission, taking into account the opinion of the Board, should establish whether the measures included in the action plan are sufficient to address the infringement, taking also into account whether adherence to relevant code of conduct is included among the measures proposed. The Commission should also monitor any subsequent measure taken by the provider of a very large online platform or of a very large online search engine concerned as set out in its action plan, taking into account also an independent audit of the provider. If following the implementation of the action plan the Commission still considers that the infringement has not been fully remedied, or if the action plan has not been provided or is not considered suitable, it should be able to use any investigative or enforcement powers pursuant to this Regulation, including the power to impose periodic penalty payments and initiating the procedure to disable access to the infringing service.