Jurisdictional Challenges Do Not Automatically Stay DSA Investigations

1. Introduction

This judgment concerns whether Coimisiún na Meán should be prevented, pending judicial review, from investigating who provides the X online platform in the European Union. The investigation concerned suspected failures to provide an effective and accessible internal complaints system under Article 20 of the Digital Services Act, Regulation (EU) 2022/2065 (“DSA”).

The applicants were an individual exercising significant control within the corporate group and X Holdings Corp. They maintained that X Internet Unlimited Company (“XIUC”), the Irish notice party, alone provided the service to EU users. They challenged the regulator’s authority to investigate whether the provider instead comprised a wider economic unit.

The immediate question was not whether that interpretation of “provider” was correct. It was whether the relevant part of the investigation should be suspended while the applicants’ substantive challenge was determined. Dunne J. refused a stay.

The decision is principally an application and clarification of established interim-relief principles in a developing regulatory setting. It does not finally establish that an individual, parent company, or corporate group constitutes a provider under the DSA.

2. Background and Statutory Framework

The parties and the investigation

XIUC is an Irish company within a chain of ownership involving X Corp., X Holdings Corp. and X.AI Holdings Corp. The individual applicant held directorial and ownership positions higher in that structure. The applicants and XIUC contended that neither applicant provided the X service in the EU or contracted with EU recipients.

Coimisiún na Meán is Ireland’s Digital Services Coordinator and, for X, the Digital Services Coordinator of Establishment. Its responsibilities therefore extend beyond Irish users: complaints received by coordinators elsewhere in the EU may be transmitted to it under Article 53 DSA.

The regulator suspected deficiencies in X’s arrangements for challenging content-moderation decisions, particularly where users reported material as incompatible with X’s own terms and conditions. Its concerns included the apparent absence of an effective appeal option, unclear information about appeal rights and outcomes, and difficulties accessing or using the mechanism.

On 24 October 2025, an authorised person directed an investigation under section 139ZI of the Broadcasting Act 2009, as amended. A notice of commencement followed on 12 November 2025. Both contemplated establishing the precise identity of the entities forming the economic unit providing X.

Why Article 20 matters

Article 20 requires providers of online platforms to maintain an internal complaint-handling system through which recipients can contest specified decisions. The protection concerns both decisions restricting users or their content and decisions not to act on reported content.

This is not simply a content-removal provision. Effective appeals can protect freedom of expression against mistaken restrictions while also enabling challenges to decisions leaving illegal or terms-incompatible material available.

These duties arise under Section 3 of Chapter III DSA. Unlike the additional obligations in Section 5, their application does not depend on designation as a very large online platform (“VLOP”).

The substantive challenge

The applicants advanced four central grounds:

1. The regulator could not commence an investigation against them without first determining that they were relevant intermediary service providers.
2. The European Commission’s earlier VLOP designation concerning XIUC prevented the regulator from expanding the identified provider.
3. Identifying the provider through an “economic unit” analysis was legally erroneous.
4. Neither applicant actually provided X in the EU.

Leave to seek judicial review was granted on 8 December 2025, including permission to seek an Article 267 TFEU reference at the substantive hearing. The notice party brought a separate challenge concerning the same investigation under Record No. 2025/1831 JR.

Although the applicants initially sought a broader suspension, their application was narrowed during argument to preventing investigation of the provider’s precise scope. They maintained that investigation of Article 20 compliance could otherwise continue against XIUC.

3. Summary of the Judgment

The regulator accepted, solely for the stay application, that the applicants had an arguable case. The court therefore concentrated on the competing consequences of granting or refusing interim relief.

Dunne J. concluded that:

• The direction and commencement notice were prima facie valid measures whose orderly implementation deserved substantial weight.
• Characterising the challenge as jurisdictional did not create an entitlement to a stay.
• The public interest strongly favoured timely investigation of suspected Article 20 failures affecting users throughout the EU.
• The supposedly limited stay would still materially obstruct effective investigation because identifying the duty-holder was closely connected with assessing compliance.
• The applicants’ evidence did not establish irreparable harm or the absence of an effective remedy.
• A potentially lengthy suspension, particularly if a CJEU reference followed, added weight against relief.

The greatest risk of injustice lay in granting the stay. The application was refused, and the existing interim stay lapsed. The court added that, even if some irreparable harm arose, the balance on these facts would still favour allowing the investigation to proceed.

4. Precedents Cited and Their Influence

A. The governing public-law balancing test

Okunade v Minister for Justice [2012] 3 IR 152 supplied the controlling framework. After establishing an arguable case, the court must assess the greatest risk of injustice, giving appropriate weight to:

• Implementation of measures that are prima facie valid;
• The public interest in the relevant statutory scheme;
• Case-specific circumstances increasing the public cost of suspension;
• The consequences for the applicant if compliance is required and the measure is later held unlawful.

Damages and the relative strength of the case may also matter in suitable circumstances. However, merits assessment must not become a premature determination of complex factual or legal issues. Crucially, establishing arguability does not itself justify suspension.

MD v Board of Management of a Secondary School [2024] IESC 11 reinforced that approach. Collins J.’s explanation rejected any assumption that a public-law challenge ordinarily suspends the challenged measure. Even decisions directly affecting only a small number of people engage public-interest considerations. Nevertheless, the judgment also confirms that those considerations are not automatically decisive: all competing rights and interests must be weighed.

Merck Sharp & Dohme v Clonmel Healthcare [2019] IESC 65, [2020] 2 IR 1 appeared within the passage quoted from MD v Board of Management of a Secondary School. It supported the broader emphasis on a principled assessment of interim relief. Dunne J. did not separately analyse or apply its factual circumstances.

B. EU interim relief and effective remedies

Joined Cases C-143/88 and C-92/89 Zuckerfabrik Süderdithmarschen AG v Hauptzollamt Itzehoe and Zuckerfabrik Soest GmbH v Hauptzollamt Paderborn (EU:C:1991:65) concerned the EU-law framework for interim protection where the validity of an EU measure is in issue. The applicants did not contend that its test directly governed this application, but suggested that an effective-remedy “gloss” might affect the domestic analysis.

Aer Lingus Ltd. v Irish Aviation Authority [2024] IEHC 625 and TikTok Technology Ltd v Data Protection Commission [2025] IEHC 619 were cited as rejecting the application of that test where EU-measure validity was not challenged and the challenge proceeded on national-law grounds. The court applied Okunade v Minister for Justice, rather than adopting a separate EU interim-relief test.

Dowling v Minister for Finance [2013] 4 IR 576 was particularly important. It confirmed that the domestic stay test satisfies effective-remedy requirements. Alleged irreparable harm therefore belongs within the balancing exercise and must be supported by evidence; it does not create an independent entitlement to suspension.

Word Perfect Translation Services Ltd. v Minister for Public Expenditure and Reform [2019] 2 IR 503 illustrated circumstances in which interim protection was necessary to preserve meaningful final relief. There, allowing a procurement contract to proceed would have left the successful challenger without an available annulment remedy, while the limitations on damages made compensation inadequate. The competing considerations were finely balanced, making remedial inadequacy potentially decisive.

Dunne J. distinguished that situation. Here, quashing orders, declarations, procedural participation and subsequent challenges remained available. The fact that participation in an investigation cannot literally be undone did not establish that those remedies would be ineffective.

Three Ireland (Hutchinson) Ltd & Ors v Commission for Communications Regulation [2022] IECA 300 concerned interim protection against a spectrum auction. Although the parties there accepted a different governing test, the decision illustrated the need to examine evidence of allegedly irreversible consequences. A general statement about preserving effective relief did not dispense with proof of the claimed harm.

Factortame appeared through a passage quoted from that judgment: interim measures exist to preserve the effectiveness of any eventual judgment. Its role here was explanatory, not a separate basis for automatic suspension.

C. Prematurity and intervention in unfinished investigations

The applicants relied heavily on Rowland v An Post [2017] 1 IR 355. That decision addresses when courts may intervene before a disciplinary or investigative process has concluded, particularly where an incurable defect would make any eventual outcome legally unsustainable.

Dunne J. drew a central distinction: authority establishing that a court can intervene does not establish that it must grant interim relief. The applicants’ jurisdictional objection did not remove the need to apply the ordinary stay test.

Ivers v The Commissioner of An Garda Síochána [2022] IECA 206, McKelvey v Iarnród Éireann [2019] IESC 79, Murphy v Commissioner of An Garda Síochána [2023] IECA 92 and Barrett v The Commissioner of An Garda Síochána [2023] IECA 112 were similarly distinguished as employment or public-office disciplinary cases. They did not establish a special rule requiring suspension of this statutory regulatory investigation.

Facebook Ireland Ltd v Data Protection Commission [2021] IEHC 336 concerned, among other matters, whether preliminary steps in an inquiry were amenable to judicial review. Its discussion of early judicial intervention arose at the substantive hearing, not on an application applying the stay test.

Google Ireland Ltd v Data Protection Commission [2024] IEHC 577 likewise concerned a substantive jurisdictional challenge to commencing an inquiry, including whether complaint admissibility first had to be established. It did not determine the principles governing interim suspension.

Together, these distinctions prevent three separate questions from being collapsed: whether proceedings may be brought now, whether the challenge ultimately succeeds, and whether the process should be stopped in the meantime.

D. Regulatory effectiveness and procedural fairness

Amazon Services Europe v European Commission (Case C-639/23 P(R), Order of 27 March 2024) supported the weight attached to timely DSA implementation. The Vice-President of the Court of Justice emphasised the regulation’s importance to a safe and trusted online environment and the danger that delayed obligations could allow threats to Charter rights to persist. Dunne J. used that reasoning to inform the public-interest assessment, not to eliminate the need for an individual balancing exercise.

Curtin v Dáil Éireann [2006] 2 IR 556 and Dellway Investment Ltd and Ors v NAMA and Ors [2011] 4 IR 1 supported the presumption that statutory powers would be exercised consistently with constitutional justice. They complemented the express procedural safeguards in the 2009 Act.

E. Subsequent decisions

X Internet Unlimited Company v Coimisiún na Meán [2026] IEHC 127 and ByteDance Ltd v Coimisiún na Meán [2026] IEHC 196 were delivered after the stay hearing. The parties provided supplemental submissions on their relevance.

The applicants sought to distinguish those decisions by reference to the powers involved, the requested duration of suspension, the proposed stay’s limited scope, and the individual applicant’s personal exposure. The regulator argued that both supported allowing statutory investigations to proceed.

Dunne J. nevertheless stressed that his conclusion rested on the evidence and balancing exercise in this case, rather than simply following the outcomes elsewhere. The earlier X decision’s warning against effectively assuming invalidity at the interim stage was consistent with his reasoning.

TikTok Technology Ltd & Ors v Data Protection Commission [2026] IESC 27 was acknowledged as a subsequent Supreme Court consideration of stay principles. Because the parties had not made submissions on it, Dunne J. expressly decided this application without relying on that judgment.

5. Analysis of the Court’s Reasoning

A. A jurisdictional objection does not reverse the interim presumption

The applicants’ strongest conceptual argument was that an investigation conducted without jurisdiction causes an injury that later success cannot erase. The court did not dismiss the importance of jurisdiction. It rejected the suggested procedural consequence.

A measure can remain prima facie valid while facing an arguable challenge to its legal foundation. Otherwise, framing a challenge as jurisdictional would largely neutralise the requirement to respect the orderly operation of statutory powers. That would turn permission to litigate into something approaching permission to suspend.

The resulting principle is limited but significant: the nature of the challenge informs the balancing exercise, but does not replace it.

B. The Commission decision strengthened, but did not conclusively determine, the balance

Article 82(3) DSA prohibits national courts from taking decisions running counter to an existing Commission decision under the regulation, while preserving Article 267 TFEU.

The Commission’s April 2023 VLOP designation had expressly reserved its position on whether the provider included entities beyond XIUC. It therefore did not provide the unqualified support the applicants sought to draw from it.

More importantly, the Commission’s decision of 5 December 2025—Decision C(2025) 8630 in cases DSA.100101, DSA.100102 and DSA.100103—identified the provider as comprising XIUC, X Holdings Corp., X.AI Holdings Corp. and the individual applicant. The applicants disputed that conclusion and intended an annulment challenge before the General Court.

Dunne J. treated the Commission decision and Article 82(3) as reinforcing the weight favouring implementation of the domestic measures. He did not hold that Article 82(3) categorically prohibited any stay, nor did he finally determine the applicants’ remaining grounds. The later Commission decision was not treated as a ruling that retrospectively cured every alleged defect in commencing the investigation.

C. The proposed partial stay was not practically neutral

The applicants argued that Article 20 compliance could still be investigated against XIUC while the broader provider inquiry was suspended.

The court rejected that proposed separation for the purposes of the balance. Article 20 imposes obligations on providers, not on an abstract service. A thorough inquiry therefore requires sufficient clarity about who bears those obligations, who holds relevant information and against whom corrective measures could operate.

Investigating only one possible member of the provider could leave evidential gaps and impair effective corrective action. Accordingly, the narrower wording of the requested order did not substantially reduce its public-interest cost.

This reasoning explains why the provider question mattered operationally. It does not finally resolve whether the regulator had statutory authority to determine that question through this investigation.

D. Public interest was concrete and EU-wide

The court’s assessment went beyond the general proposition that regulators should be allowed to regulate. Article 20 safeguards potentially consequential moderation decisions, and the evidence identified serious categories of harmful content relevant to the suspected appeal failures.

X had approximately 102 million average monthly active EU recipients during April–June 2025. As coordinator of establishment, the regulator’s ability to investigate affected the practical protection of users across Member States.

The court also accepted the importance of compulsory information-gathering powers: without them, the regulator would depend on voluntary cooperation. It regarded the risk of investigations being stalled merely by challenges to their initiation as a legitimate additional concern.

E. Alleged harm required specific evidence

The applicants relied on intrusive investigatory powers, potential interim measures, criminal consequences for non-compliance, business disruption, compliance costs and possible disclosure of sensitive information.

The court found those allegations insufficiently substantiated:

• Early procedural stage: no relevant findings had been made, and the feared powers had not been exercised or threatened.
• Contingent criminal exposure: there was no evidence of intended obstruction, false information or refusal to comply. Possible penalties for hypothetical future non-compliance did not establish present irreparable harm.
• Unparticularised business effects: assertions about diverted personnel, executive time and operational disruption lacked concrete detail.
• Existing information: the applicants already knew their corporate arrangements and had participated in the Commission’s provider inquiry.
• Personal harm: the individual applicant had not supplied an affidavit explaining the alleged consequences directly.
• Confidentiality: the evidence did not demonstrate an irreparable disclosure risk, and the regulator’s confidentiality protections were accepted.

The absence of a personal affidavit was an evidential weakness here, not a universal rule requiring every individual applicant to swear one. Likewise, the judgment does not hold that compliance costs or confidentiality risks can never justify relief. The problem was the speculative and general nature of the evidence presented.

F. Effective relief remained available

The applicants invoked Article 51(6) DSA and argued that completing an unlawful investigation would leave nothing meaningful to remedy.

The court distinguished an effective remedy from complete reversal of every practical consequence. If the substantive challenge succeeded, quashing orders and declarations remained available. The statutory process also supplied opportunities to contest evidence, findings and sanctions.

Important safeguards included:

• An initial opportunity to respond to commencement, without a mandatory obligation to submit that response;
• Protection against self-incrimination and High Court witness immunities and privileges;
• Access to the draft report and supporting information, with ordinarily 28 days for submissions;
• A prohibition on the investigating officer recommending or expressing an opinion on an administrative financial sanction;
• Further submissions before the regulator’s decision, and an oral hearing where necessary for fairness;
• Submissions on any proposed financial sanction;
• A statutory appeal: to the Circuit Court where no financial sanction or one below €75,000 is imposed, and otherwise to the High Court;
• Judicial confirmation procedures where no appeal is brought, alongside judicial review where appropriate.

These safeguards did not make an allegedly unlawful investigation lawful. They were relevant to whether allowing it to continue would deprive the applicants of meaningful protection.

G. Duration mattered in both directions

The substantive judicial review had been heard in June 2026 and judgment reserved. Nevertheless, a possible Article 267 reference meant that suspension could continue for a considerable period.

The court did not treat duration as an automatic objection to relief. It assessed duration alongside the absence of demonstrated irreparable harm and the cumulative public cost of delayed enforcement.

6. Complex Concepts Simplified

Stay

A temporary court order pausing a decision or process while litigation continues. Refusing one does not decide the final case.

Prima facie valid

A measure treated as legally operative unless successfully challenged. This is not a final declaration that it is lawful.

Ultra vires

Acting beyond the powers conferred by law. Here, the applicants alleged that the regulator could not investigate them in the manner proposed.

Main establishment and provider

The main establishment identifies the relevant EU regulatory connection. Whether it necessarily identifies the entire provider was disputed; the court did not finally determine that issue.

Economic unit

A proposed approach looking beyond separate corporate identities to an integrated undertaking. Its use to identify the DSA provider remained contested. The judgment does not make every commonly controlled company a provider.

Effective remedy

Meaningful legal protection capable of vindicating a right. It need not restore every aspect of the position as though an investigation had never occurred.

Certiorari and Article 267 reference

Certiorari quashes an unlawful decision. An Article 267 reference asks the CJEU for an authoritative ruling on EU-law questions needed to decide national proceedings.

7. Likely Impact and Limits

The judgment reinforces a demanding, evidence-based approach to attempts to stop DSA investigations at their outset. Applicants must explain concretely why continued investigation creates injustice that available procedures and later relief cannot adequately address.

It also discourages treating challenges to regulatory jurisdiction as a separate, more favourable category of stay application. Such challenges may justify early judicial scrutiny without necessarily justifying interim suspension.

For regulators, the decision supports explaining precisely how a proposed stay would obstruct evidence-gathering, identification of duty-holders and effective protection of users. Its reasoning is stronger than a generic appeal to statutory functions because it connects enforcement delay with specific rights and practical consequences.

Finally, Article 82(3) introduces an important coordination consideration where Commission and national proceedings overlap. Existing Commission decisions cannot be ignored, but their effect must be addressed without prematurely deciding substantive questions reserved for later proceedings.

The limits remain substantial: this was a fact-specific interlocutory decision. It did not determine the correct DSA definition of provider, approve the economic-unit approach generally, impose personal liability, or decide whether any Article 20 contravention occurred.

8. Conclusion

The central lesson is that an arguable jurisdictional challenge does not automatically stop a DSA investigation. Interim relief depends on the greatest risk of injustice, assessed through evidence, available safeguards, existing EU decisions and the public consequences of delay.

Here, speculative harm and preserved remedies could not outweigh the substantial interest in timely investigation. The investigation could proceed, while the applicants’ substantive objections remained for determination.