The function of the Court of Justice of the European Union (ECJ) is to monitor compliance with the law of the EU. His judgments are jurisprudence on the interpretation of the right of EU and therefore broader than the country directly affected by the case that was brought before it scope – here Bulgaria.
A Sudanese national was arrested in Bulgaria because he had no identity document and placed in detention for deportation. The tribunal decided at the request of authorities extend detention on the grounds that this person does not have an identity document, he might be hiding and prevented his deportation. The ECJ held that this decision was contrary to the “return” directive 2008: the fact not to have an identity document is not in itself a valid reason to extend the detention of a person.
The ECJ ruling is available here (in French):
The press release of the ECJ is available here (in English):