4. In the event that the competent authority objects to the Commission's recommendation, the Commission may, within four months of receipt of the notification of the competent authority's reasons for objection, withdraw its recommendation or convene a meeting with the competent authority and, where the Commission considers it to be necessary, the ECG, in order to assess the issue. The Commission shall set out detailed reasons for requesting any modifications to the risk-preparedness plan. Where the final position of the competent authority concerned diverges from the Commission's detailed reasons, that competent authority shall provide the Commission with the reasons for its position within two months of receipt of the Commission's detailed reasons.