The Court delivered yesterday its judgment in case C‑214/17 (Alexander Mölk v Valentina Mölk), which is about Hague Maintenance Protocol

« 1. On a proper construction of Article 4(3) of the Hague Protocol of 23 November 2007 on the Law Applicable to Maintenance Obligations […] the result of a situation […] where the maintenance to be paid was set by a decision, which has acquired the force of res judicata, in response to an application by the creditor and, pursuant to Article 4(3) of that protocol, on the basis of the law of the forum designated under that provision, is not that that law governs a subsequent application for a reduction in the amount of maintenance lodged by the debtor against the creditor with the courts of the State where that debtor is habitually resident.

2. Article 4(3) of the Hague Protocol of 23 November 2007 must be interpreted as meaning that a creditor does not ‘seise’, for the purposes of that article, the competent authority of the State where the debtor has his habitual residence when that creditor, in the context of proceedings initiated by the debtor before that authority, enters an appearance, for the purposes of Article 5 of Council Regulation (EC) No 4/2009 of 18 December 2008 on jurisdiction, applicable law, recognition and enforcement of decisions and cooperation in matters relating to maintenance obligations, contending that the application should be dismissed on the merits ».

Source: here