1. The Commission shall assess the recovery and resilience plan or, where applicable, the update to that plan submitted by the Member State in accordance with Article 18(1) or 18(2) within two months of the official submission, and make a proposal for a Council implementing decision in accordance with Article 20(1). When carrying out that assessment, the Commission shall act in close cooperation with the Member State concerned. The Commission may make observations or seek additional information. The Member State concerned shall provide the requested additional information and may revise the recovery and resilience plan if needed, including after the official submission of the recovery and resilience plan. The Member State concerned and the Commission may agree to extend the deadline for assessment by a reasonable period if necessary.