Doyle (No. 3): Climate Act s.15 “spectrum of options”, incorporation of CPPAs via conditions, and “probability not possibility” for bat derogation sequencing

4.1 Precedents cited (and how they shaped the decision)

A. Climate Act s.15 after the Supreme Court in Coolglass v. An Coimisiún Pleanála [2026] IESC 5

Coolglass v. An Coimisiún Pleanála [2026] IESC 5 is the controlling authority on the meaning of s.15(1) (“perform its functions in a manner consistent with… insofar as practicable”). Humphreys J. treated Coolglass as establishing:

• Enforceability: s.15 creates a legal standard enforceable by courts.
• Not merely procedural / not “have regard”: it is more than a “have regard” duty.
• Outcome-focused but tolerant: “consistent with” implies a range of lawful outcomes; “insofar as practicable” qualifies strictness.
• Review question: whether the decision falls within the spectrum of possible outcomes that could be consistent, insofar as practicable, with s.15.
• Plan-led presumption: compliance with a development plan may be presumed s.15-compliant, subject to rebuttal.
• Process salience: where (and only where) a matter is raised, the authority should be able to explain compliance.

Applying that framework, the Court rejected attempts to turn CAP 2023 language (e.g., “moderation” of demand growth, “hourly matching” aspirations, or hydrogen prioritisation passages) into rigid, project-level prohibitions.

B. The “developer can defend even if the decision-maker concedes” rule: Ballyboden Tidy Towns Group v. An Bord Pleanála & Ors. [2024] IESC 4

The case’s procedural architecture (modular hearing after the Commission’s initial concession on bats/EIA) was expressly built on Ballyboden Tidy Towns Group v. An Bord Pleanála & Ors. [2024] IESC 4, which confirmed that a notice party may defend the permission even if the decision-maker does not. The judgment uses this to explain:

• why Module I proceeded despite the Commission’s concession;
• the Court’s approach in modular hearings: for the “conceded point” module, other issues are treated as if resolved in the notice party’s favour, then revert to full contest if the case proceeds.

C. ETS relevance in climate/EIA reasoning: Coyne v. An Bord Pleanála [2023] IEHC 412

The Court relied on Coyne v. An Bord Pleanála [2023] IEHC 412 to reject the applicants’ contention that ETS considerations are irrelevant or impermissible. ETS is treated as an “obviously relevant” component of the policy/legal matrix, including in EIA because Annex IV requires the EIAR to take into account relevant EU-level environmental protection objectives.

Importantly, Humphreys J. did not

D. General judicial review discipline (legality, not merits)

The judgment consolidates familiar “JR fundamentals” by extensive citation, using them to keep climate litigation within orthodox public-law limits:

• Legality not merits: Sweeney v. Fahy [2014] IESC 50; the State (Keegan) v. Stardust Compensation Tribunal [1986] I.R. 642; Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3.
• Planning evaluative judgments reviewed on irrationality: Sherwin v. An Bord Pleanála [2024] IESC 13; Graymount House Action Group v. An Bord Pleanála [2024] IEHC 327 and Graymount House Action Group v. An Bord Pleanála [2025] IESCDET 22.
• Read decisions sensibly/in the round; avoid micro-parsing: M.R. (Bangladesh) v. International Protection Appeals Tribunal [2020] IEHC 41; St. Margaret's Recycling v. An Bord Pleanála [2024] IEHC 94; O'Sullivan v. Health Service Executive [2023] IESC 11.
• Stringent pleading requirements: Hellfire Massy Residents Association v. An Bord Pleanála [2022] IESC 38; Concerned Residents of Treascon and Clondoolusk v. An Bord Pleanála & Ors. [2024] IESC 28.
• Onus of proof on applicant: Meadows v. Minister for Justice, Equality and Law Reform [2010] IESC 3; the presumption of validity is emphasised and repeatedly applied.

E. Incorporation by reference: conditions “plans and particulars” as enforceable mitigation

The Court treated it as settled that planning permissions incorporating “plans and particulars” must be construed together with incorporated documents, citing Kelly Dunne & Ors v. Guessford Limited [2022] IECA 223. That principle underpinned the Court’s conclusion that Conditions 1 and 3 captured the CPPA commitments contained in the appeal response documentation. Humphreys J. also cross-referred to his own approaches in Fahybeg Windfarm Opposition Group v. An Bord Pleanála [2025] IEHC 310 and Rural Residents v. An Coimisiún Pleanála (No. 1) [2025] IEHC 600.

F. EU law derogation sequencing and probability threshold

The applicants relied on Namur Est (Case 463/20) to argue that a derogation licence must precede consent. The Court ultimately disposed of the point on facts/threshold rather than on a broad ruling about Irish “two-consent” architecture, holding that: derogation sequencing obligations are only engaged where the need for derogation is shown to be probable rather than merely possible.

The judgment also referenced Hellfire Massy Residents Association v An Bord Pleanála and Others, C-166/22, ECLI:EU:C:2023:545 as relevant to the probability threshold (only engaged once probability is crossed), and noted IE v Magistrat der Stadt Wien Case C‑477/19 in the context of when protection can extend to “once but no longer occupied” resting places (requiring sufficiently high probability of return).

4.2 Legal reasoning (why the applicants lost)

A. Climate grounds: “spectrum of options” + pleading/onus + net emissions

The Court’s reasoning proceeds in layers:

• No “wrong question” error: The Commission’s order listed items it “had regard to”, including CAP 2023. The applicants treated “had regard to” as proof the Commission applied an outdated pre-2021 test. The Court rejected this as semantic overreach: the inspector’s report referred to “compliance” with climate policies, and the decision overall could not fairly be read as reducing s.15 to a “have regard” duty.
• Carbon budgets/SECs arguments failed on pleading and on legal architecture: The applicants attempted to derive an arithmetic, project-level “headroom” veto from SECs and carbon budgets by an indirect route via CAP 2023. The Court held (i) the key CAP passage invoked (12.1.4) was not pleaded as the required pathway, and (ii) even if considered, the argument overstates s.15: Coolglass requires assessing whether the decision falls within a lawful spectrum, not applying a rigid mathematical gatekeeper to individual permissions.
• Policy passages are not self-executing prohibitions: Claims based on CAP 2023 “hourly matching” language, hydrogen prioritisation, or “moderation” of demand growth were treated as policy-level, flexible statements that do not, without more, compel refusal. The Court repeatedly characterised the applicants’ approach as misreading flexible policy language as mandatory, prescriptive rules.
• ETS is relevant but not necessarily sufficient—yet the case did not turn on ETS alone: Humphreys J. accepted ETS relevance (per Coyne), but expressed caution about treating ETS as automatically conclusive for s.15. The decisive point was that the project, on the evidence accepted by the Commission, would be powered from renewables via CPPAs, shifting the analysis from gross to net emissions impacts.
• CPPA mitigation was legally secured: The applicants’ “no mitigation / no CPPA condition” argument collapsed once Conditions 1 and 3 were construed as incorporating the CPPA commitments in the “plans and particulars” and “mitigation measures” documentation. The Court treated an express CPPA condition as unnecessary repetition and ordered a recital confirming the incorporated obligation.
• Reasons challenge failed because it misread the inspector’s “no new issues” remark: The inspector’s phrase “The responses did not raise any new issues of substance” was read in context: after 16 pages summarising issues already raised, it meant no new headings of substance emerged in the further submissions round. The Court held this did not show dismissal/ignoring of climate submissions and did not breach reasons standards.

B. Bats/EIA: derogation licence not shown to be probable

The remaining EU-law issue was framed as a sequencing point: if a derogation licence decision is a “partial assessment” outside the development-consent authority, must it be obtained first (per Namur Est (Case 463/20))?

The Court did not need to reach an abstract ruling on the Irish two-stage model because the applicants failed to establish the factual predicate: that derogation was probable at the time of consent. Given bat mobility and time elapsed, the Court held there was “realistically zero chance” the specific bat would still be in the same crack years later, and the applicants had not displaced that assessment.

The Court also criticised the attempt to introduce “once a roost always a roost” evidence in Module II as a belated effort to undo Module I findings, treating modularisation as not permitting parties to “mend their hand” after an adverse factual determination.

4.3 Impact

A. Planning and climate litigation: what this judgment adds

• Operationalises Coolglass in a “major electricity user” context: The judgment illustrates how s.15 arguments can fail where they are framed as rigid prohibitions or arithmetic vetoes, rather than as challenges showing the decision fell outside a lawful “spectrum” after considering practicability and the materials before the decision-maker.
• Net-emissions framing is central: The Court’s approach signals that, for s.15 challenges to emissions-intensive projects, the legally meaningful question will often be net impact after mitigation/offsetting secured by conditions and incorporated documents, rather than gross emissions alone.
• High pleading discipline in “science-heavy” cases: Many applicant critiques were treated as either (i) unpleaded, or (ii) submissions that did not translate into a pleaded legal wrong. This intensifies the premium on precise pleading of (a) the legal pathway from instrument to duty, (b) the exact alleged inconsistency, and (c) why mitigation/offsetting does not cure it.
• Incorporation-by-reference can be decisive for climate mitigation: The “CPPA condition” holding underscores that applicants must grapple with the full permission package, including documents incorporated by Conditions 1 and 3; otherwise, “no condition” arguments may fail.

B. Renewable procurement and “additionality”

Although the Government Statement on data centres refers to CPPAs that “add additional renewables”, the Court treated “additionality” arguments (as framed) as unpleaded and, in substance, as attempts to impose a stricter rule than s.15/CAP 2023 clearly mandate at project level. Future cases may test whether and when “additionality” becomes a legally required component of s.15 consistency, but this judgment does not establish such a rule.

C. EU nature protection: derogation sequencing narrowed by probability

On the wildlife side, the judgment’s practical effect is to discourage abstract Namur Est-style sequencing challenges unless applicants can first establish that protected-species harm (and thus derogation need) is probable on the evidence before the decision-maker at the time. That is a significant evidential gatekeeping point for EIA/nature litigation involving mobile species and time-lagged survey data.