Reference to the Court of Justice of the European Union pursuant to Art. 267 TFEU. The Chamber refers to the CJEU questions on the interpretation of Directive 2014/41 (EIO Directive), in particular: (1) whether a European Investigation Order must be issued by a judge where serious infringements of fundamental rights are at stake (interpretation of the term 'issuing authority' under Art. 6(1) in conjunction with Art. 2(c) EIO Directive); (2) whether Art. 6(1)(a) EIO Directive precludes an EIO seeking the transmission of pre-existing telecommunications surveillance data.