On June 5th 2018, the European Court of Justice rendered its judgment in case Case C‑673/16, finding that all EU Members must recognize same-sex marriage in relation to immigration cases where one partner is a citizen of the EU.
The Court held :
1. In a situation in which a Union citizen has made use of his freedom of movement by moving to and taking up genuine residence, in accordance with the conditions laid down in Article 7(1) of Directive 2004/38/EC of the European Parliament and of the Council of 29 April 2004 on the right of citizens of the Union and their family members to move and reside freely within the territory of the Member States amending Regulation (EEC) No 1612/68 and repealing Directives 64/221/EEC, 68/360/EEC, 72/194/EEC, 73/148/EEC, 75/34/EEC, 75/35/EEC, 90/364/EEC, 90/365/EEC and 93/96/EEC, in a Member State other than that of which he is a national, and, whilst there, has created and strengthened a family life with a third-country national of the same sex to whom he is joined by a marriage lawfully concluded in the host Member State, Article 21(1) TFEU must be interpreted as precluding the competent authorities of the Member State of which the Union citizen is a national from refusing to grant that third-country national a right of residence in the territory of that Member State on the ground that the law of that Member State does not recognise marriage between persons of the same sex.
2. Article 21(1) TFEU is to be interpreted as meaning that, in circumstances such as those of the main proceedings, a third-country national of the same sex as a Union citizen whose marriage to that citizen was concluded in a Member State in accordance with the law of that state has the right to reside in the territory of the Member State of which the Union citizen is a national for more than three months. That derived right of residence cannot be made subject to stricter conditions than those laid down in Article 7 of Directive 2004/38.
The judgment is available online : Link