ATHABASCA CHIPEWYAN FIRST NATION v ALBERTA (ENERGY REGULATOR), 2026 ABKB 628

The Alberta Energy Regulator (“AER”) applied pursuant to Rule 3.61 for further particulars of the Athabasca Chipewyan First Nation (“ACFN”)’s claims. ACFN’s claims included AER’s alleged failure to regulate tailings discharges from the Kearl oil sands facility and to notify ACFN regarding those discharges, as well as a claim against Alberta for breaching its duty to consult.

Rule 3.61 allows a party served with a pleading to request particulars about anything in that pleading and, if it does not receive a sufficient response within 10 days, to apply for an Order compelling particulars. A request for particulars does not suspend the requesting party’s obligation to file and serve its own pleading. The Court interpreted Rule 3.61 together with Rule 13.6, the latter of which requires a pleading to be succinct and state the facts relied upon rather than the evidence by which those facts will be proved, and Rule 13.7, which requires particulars of specified allegations.

Justice Renke held that particulars are factual propositions that specify, clarify, restrict or limit more general pleaded facts. Particulars are distinct from the evidence by which those facts will ultimately be established. Essential facts are necessary to disclose a complete cause of action and they must be pleaded; however, their absence is properly addressed through an Application to Strike rather than a request for particulars. Particulars may constitute material facts because they add factual specificity and, once provided pursuant to Rule 3.61, form part of the pleading. Renke J. explained that the distinction between particulars and evidence is functional: particulars define or constrain the facts in issue, while evidence proves or disproves those facts.

The Court found that the primary purpose of particulars pursuant to Rule 3.61 is to provide the responding party sufficient notice of the case it must meet and enough information to frame its Statement of Defence. The party seeking particulars bears the onus of establishing that the requested information is necessary to plead. Justice Renke noted that the Court will generally hesitate to order particulars before the Defendant has served a Statement of Defence unless the particulars are necessary to formulate that Defence. Particulars may also prevent surprise, define or narrow the issues, identify the evidence required and circumscribe Questioning and records disclosure, but those secondary objectives may instead be addressed through disclosure, Questioning or Case Management. In this case, the Court rejected particulars as the primary means of resolving an extensive document production problem where the Pleading already provided sufficient information to permit a Statement of Defence.

Renke J. held that the decision to order particulars is discretionary, practical and context-specific and must be reasonable and fair in the circumstances. Relevant circumstances include the magnitude and complexity of the Action and the relationship between the parties. Notably, a Defendant’s knowledge of its own conduct does not negate its entitlement to particulars. In other words, the Defendant might know what they did, but not what the Plaintiff thinks they did. The Court may also consider an asymmetry in access to information where the Plaintiff knows that it suffered harm but lacks the Defendant’s information concerning how or why that harm occurred.

Justice Renke emphasized that complex litigation requires a realistic and pragmatic approach because not every claim can be pleaded with equal precision at the outset and later disclosure, Questioning and Case Management may clarify and narrow the issues. Renke J. also held that the Court must read a pleading contextually and as a whole, including any particulars already supplied, and may treat a fact properly inferred from other pleaded facts as sufficiently pleaded.

The Court rejected AER’s argument that Rules 13.6(3) and 13.7 imposed a heightened standard of particularity because ACFN had to establish bad faith to overcome AER’s statutory immunity, as set out in Section 27 of the Responsible Energy Development Act, SA 2012, c R-17.3.

Justice Renke found that ACFN’s claims against the AER were in the nature of bad faith through serious carelessness or recklessness, rather than bad faith through intentional wrongdoing or wilful default. As such, the provisions of Rules 13.6(3) and 13.7 concerning wilful default did not apply. Renke J. held that Rule 13.6(3)(r), which addresses reliance on a provision of an enactment that may take another party by surprise, confirmed that the ordinary standard governing particulars applied. The Court concluded that ACFN had pleaded factual foundations for its allegations and that many of AER’s requests improperly sought details, including dates, authors, formats and recipients, that were essentially evidence. Justice Renke dismissed the AER’s Application, except that ACFN was required to amend two of its existing responses to particulars.