Introduction
On 15 October 2026, the Court of Justice of the European Union (Fourth Chamber) delivered its judgment in Case C-199/25, bearing the ECLI identifier ECLI:EU:C:2026:862. The case arose from a request for a preliminary ruling submitted by the Hof van beroep te Brussel (Court of Appeal, Brussels, Belgium) by decision of 19 February 2025, which reached the Court on 11 March 2025.
The dispute before the referring court involved a group of Flemish electricity distribution network operators — collectively operating under the Fluvius brand and formerly known under various intercommunal names — and the Vlaamse Nutsregulator, formerly the Vlaamse Regulator van de Elektriciteits- en Gasmarkt (VREG), the Flemish energy regulatory authority.
The preliminary ruling procedure, governed by Article 267 of the Treaty on the Functioning of the European Union, allows national courts to seek authoritative guidance from the Court of Justice on the interpretation of EU law before resolving a dispute. This article explains the institutional context, the legal questions raised, and the significance of the judgment as reflected in the official document.
The parties and their roles
The applicants in the main proceedings are eight distribution network operators active in the Flemish Region of Belgium. The document identifies them as Fluvius Halle-Vilvoorde (formerly Sibelgas), Fluvius Kempen (formerly IVEKA), Fluvius IMEWO (formerly IMEWO), Fluvius West (formerly Fluvius West and GASELWEST), Fluvius Zenne-Dijle (formerly Iverlek and P.B.E.), Fluvius Midden-Vlaanderen (formerly INTERGEM), Fluvius Antwerpen, and Fluvius Limburg.
The respondent is the Vlaamse Nutsregulator, formerly known as VREG. As the competent national regulatory authority for the Flemish electricity and gas market, it exercises supervisory and tariff-setting functions in relation to distribution network operators.
The Belgian government and the Finnish government submitted observations in the proceedings, as did the European Commission, reflecting the broader relevance of the legal questions to EU energy market governance across member states.
Legal framework at issue
The judgment addresses questions arising under two principal instruments of EU energy law. The first is Regulation (EU) 2019/943 on the internal market for electricity, specifically Article 18(1), which concerns network access charges, network usage charges, and congestion charges. The second is Directive (EU) 2019/944 on common rules for the internal market for electricity, specifically Article 9, Article 57(4) and (5), and Article 59(1)(a).
The document's subject-matter heading identifies several interconnected legal themes: network access, usage, and reinforcement charges; non-network costs supporting other policy objectives; national legislation providing for the inclusion in network tariffs of costs related to public service obligations imposed on distribution network operators; the independence of the national regulatory authority in the exercise of its tasks and powers; and the tariff methodology for electricity distribution using a method based on the evolution of historical costs.
These themes reflect longstanding tensions in EU energy law between the harmonised framework for network tariff-setting at the EU level and the discretion retained by member states and their regulatory authorities to pursue national policy objectives, including public service obligations, through tariff structures.
The preliminary ruling procedure and procedural background
The Hof van beroep te Brussel referred the questions to the Court of Justice under Article 267 TFEU. The referral decision was dated 19 February 2025 and was received by the Court on 11 March 2025, placing the case within the standard preliminary ruling procedure.
The case was assigned to the Fourth Chamber, composed of Judge I. Jarukaitis as President of the Chamber, Judges R. Frendo, N. Jääskinen, M. Condinanzi (acting as Rapporteur), and A. Kornezov. Advocate General A. Rantos was appointed to the case, and the Registry was administered by A. Lamote.
The Court conducted both written proceedings and an oral hearing, the latter taking place on 11 February 2026. Written observations were submitted by the Fluvius entities, by the Vlaamse Nutsregulator, by the Belgian government, by the Finnish government, and by the European Commission.
Key legal questions examined
The document indicates that the Court examined whether national legislation permitting the inclusion in electricity distribution network tariffs of costs associated with public service obligations imposed on distribution network operators is compatible with Article 18(1) of Regulation (EU) 2019/943 and the relevant provisions of Directive (EU) 2019/944.
A related question concerns the concept of 'non-network costs supporting other policy objectives' as contemplated within the EU regulatory framework, and the extent to which such costs may lawfully be reflected in network tariffs without undermining the principles of cost-reflectivity and transparency that underpin the internal electricity market.
The document also identifies the independence of the national regulatory authority as a central issue. Articles 57(4) and (5) and Article 59(1)(a) of Directive (EU) 2019/944 establish requirements regarding the autonomy of national regulatory authorities in exercising their tasks and powers, including tariff-setting. The judgment examines how those requirements interact with national legislative frameworks that may constrain or direct the regulatory authority's methodology.
Finally, the document highlights the specific tariff methodology under scrutiny: a method based on the evolution of historical costs used for electricity distribution tariff-setting in the Flemish Region. The compatibility of such a methodology with EU law requirements for network charges forms part of the legal analysis.
Significance for EU energy market governance
Case C-199/25 is significant because it engages directly with the 'Clean Energy for All Europeans' legislative package, of which Regulation (EU) 2019/943 and Directive (EU) 2019/944 form a central part. These instruments aim to create a more integrated, competitive, and consumer-oriented internal electricity market across the EU.
The question of whether public service obligation costs may be incorporated into network tariffs is of practical importance for distribution network operators and regulators throughout the EU, since many member states impose social, environmental, or other policy-driven obligations on network operators that generate costs not directly linked to network infrastructure.
The independence of national regulatory authorities is a structural cornerstone of the EU electricity market framework. The Court's examination of how that independence interacts with national legislative directions on tariff methodology has implications for the institutional design of energy regulation across member states.
The participation of the Finnish government alongside the Belgian government as an intervening party underscores that the legal questions raised are not confined to Belgium but are of wider relevance to the organisation of electricity distribution regulation in other EU member states.
Conclusion
The judgment of the Court of Justice (Fourth Chamber) of 15 October 2026 in Case C-199/25 (Fluvius Halle-Vilvoorde and Others v Vlaamse Nutsregulator) addresses important questions at the intersection of EU electricity market regulation, national tariff methodology, public service obligations, and the institutional independence of national regulatory authorities.
As a preliminary ruling delivered in response to a referral from the Hof van beroep te Brussel, the judgment provides authoritative guidance on the interpretation of Article 18(1) of Regulation (EU) 2019/943 and Articles 9, 57(4) and (5), and 59(1)(a) of Directive (EU) 2019/944 in the context of Flemish electricity distribution tariff-setting. Its reasoning is binding on the referring court and carries interpretive authority for courts and regulatory authorities across the EU.
Stakeholders in the energy sector — including distribution network operators, national regulatory authorities, and public authorities responsible for defining public service obligations — should be attentive to the principles articulated in this judgment when designing or reviewing tariff frameworks and regulatory methodologies.
This article is for educational and informational purposes only and does not constitute legal advice.
Sources consulted
- Judgment of the Court (Fourth Chamber) of 15 October 2026. — Fluvius Halle-Vilvoorde, anciennement Sibelgas and Others v De Vlaamse Nutsregulator, anciennement de Vlaamse Regulator van de Elektriciteits-en Gasmarkt (VREG). — Request for a preliminary ruling from the Hof van beroep te Brussel. — Case C-199/25. - Court of Justice of the European Union, European Union
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