Interim measures can be an important tool to ensure that, while an investigation is ongoing, the infringement being investigated does not lead to the risk of serious damage for the recipients of the service. This tool is important to avoid developments that could be very difficult to reverse by a decision taken by the Commission at the end of the proceedings. The Commission should therefore have the power to impose interim measures by decision in the context of proceedings opened in view of the possible adoption of a decision of non-compliance. This power should apply in cases where the Commission has made a prima facie finding of infringement of obligations under this Regulation by the provider of very large online platform or of very large online search engine. A decision imposing interim measures should only apply for a specified period, either one ending with the conclusion of the proceedings by the Commission, or for a fixed period which can be renewed insofar as it is necessary and appropriate.