If a case is closed pursuant to the provision of Article 14 (including as applied mutatis mutandis pursuant to Article 15) or if an order ceases to have effect pursuant to the provisions of paragraph (4) of the preceding Article, and the petitioner then files an action with regard to the claim for which mediation was sought within two weeks from the day on which the petitioner receives the notice to that effect, that the action is deemed to have been filed at the time of the filing of the petition for mediation.