## Facts

- The European Court of Justice (ECJ) in Case C-212/04, Adeneler, examined the obligation of national courts to interpret national law in compliance with EU directives.
- The case addressed the time limits of the duty of consistent interpretation, particularly before and after a directive's implementation deadline.
- The duty arises from the principle of sincere cooperation in Article 4(3) of the Treaty on European Union (TEU).
- Adeneler concerned the obligations of national courts regarding both the period prior to, and after, the deadline for implementing an EU directive.
- The judgment considered the interaction between EU directives and national law, especially in the context of indirect effect and national courts' interpretative responsibilities.

## Issues

1. Whether national courts have a duty of consistent interpretation before the deadline for transposing an EU directive.
2. What the scope and extent of the duty of consistent interpretation is after the deadline for implementing a directive.
3. To what extent the obligation of consistent interpretation is qualified by the phrase "as far as possible."
4. How Adeneler fits within and clarifies existing ECJ case law on the rule of indirect effect and the application of sincere cooperation.

## Decision

- The ECJ confirmed that national courts have a limited duty of consistent interpretation before a directive's implementation deadline; this duty exists but is restricted.
- Before the deadline, courts must avoid interpretations that would undermine the directive’s objectives after implementation, but are not required to fully align national law with the directive.
- After the deadline, the duty becomes fully engaged: national courts must interpret national law to align with the directive so far as possible to ensure effective application.
- The obligation is not unlimited—the duty of consistent interpretation does not require national courts to interpret national law contra legem or against its clear and unequivocal wording.
- Adeneler provides practical guidance by clearly distinguishing the temporal scope and strength of the duty of consistent interpretation, both before and after a directive’s deadline.

## Legal Principles

- The duty of consistent interpretation derives from the principle of sincere cooperation (Article 4(3) TEU).
- There is a distinction between the pre- and post-implementation periods regarding the strength of this duty.
- The rule operates within the limits of national law, bound by the phrase "as far as possible," ensuring courts do not interpret laws against their plain meaning.
- Adeneler clarifies and builds upon earlier ECJ jurisprudence on indirect effect, such as Kolpinghuis Nijmegen (C-397/88) and Pfeiffer (C-397/01), specifying the temporal dimensions of the duty.

## Conclusion

Adeneler establishes a clear framework for national courts: a limited duty of consistent interpretation applies before a directive’s implementation deadline, becoming fully enforceable thereafter, but always restricted by the reasonable limits of national law's wording. The case strengthens the principle of sincere cooperation and the effectiveness of EU law, guiding national judges on the temporal and substantive boundaries of consistent interpretation.

Adeneler v Ellinikos Organismos Galaktos (Case C-212/04) [2006] ECR I-6057