The Board should be able to refer the matter to the Commission in case of any disagreement as to the assessments or the measures taken or proposed or of a failure to adopt any measures in accordance with this Regulation following a cross-border cooperation request or a joint investigation. Where the Commission, on the basis of the information made available by the concerned authorities, considers that the proposed measures, including the proposed level of fines, cannot ensure the effective enforcement of the obligations laid down in this Regulation, it should accordingly be able to express its serious doubts and request the competent Digital Services Coordinator to re-assess the matter and take the necessary measures to ensure compliance with this Regulation within a defined period. This possibility is without prejudice to the Commission’s general duty to oversee the application of, and where necessary enforce, Union law under the control of the Court of Justice of the European Union in accordance with the Treaties.