Article 3(5) of the Treaty on European Union (TEU) sets out the Union’s obligation to “contribute […] to the strict observance and the development of international law”. The Court of Justice of the European Union (CJEU) has interpreted this to mean that “when [the Union] adopts an act, it is bound to observe international law in its entirety, including customary international law, which is binding upon the institutions of the European Union.” Until now, however, the CJEU had not gone so far as to annul a Union legal act on the basis that it violates international law. On 4 October 2024 the Grand Chamber of the Court of Justice upheld the General Court’s decision to annul two economic agreements concluded between the European Union and the Kingdom of Morocco. The landmark judgment is the first time the CJEU has annulled an EU agreement for violating international law binding on the Union.
The legal and factual background to these cases has been discussed elsewhere on this blog. The cases relate to the former Spanish colony of Western Sahara, which is considered by the United Nations to be a non-self-governing territory. In a 1975 Advisory Opinion, the International Court of Justice (ICJ) recognised the people of Western Sahara have the right to self-determination. The status of the territory continues to be subject to a long-stalled United Nations mediated peace process. France, the only EU Member State with a permanent seat on the UN Security Council, recently backed Morocco’s autonomy plan that would recognise Morocco’s sovereignty over the territory.
The economic agreements between the European Union and the Kingdom of Morocco have been the subject to ongoing litigation before the CJEU and domestic courts in the EU Member States over the last decade. In December 2015, the General Court annulled the Council Decision approving the Euro-Mediterranean Agreement concluded between the EU and Morocco in so far that it applies to the territory of Western Sahara. That decision was reversed on appeal in 2016. In these judgments, the Court highlighted two important factors. First, the territory of Western Sahara is separate and distinct from Morocco. Second, as Western Sahara is considered a ‘third party’ to these agreements, they can only apply with respect to Western Sahara with the consent of the people of Western Sahara.