Reasonableness Review
Canada (Minister of Citizenship and Immigration) v. Vavilov, 2019 SCC 65 (CanLII)
B. Reasonableness Review Is Concerned With the Decision-making Process and Its Outcomes
[82] Reasonableness review aims to give effect to the legislature’s intent to leave certain decisions with an administrative body while fulfilling the constitutional role of judicial review to ensure that exercises of state power are subject to the rule of law: see Dunsmuir, at paras. 27-28 and 48; Catalyst Paper Corp. v. North Cowichan (District), 2012 SCC 2, [2012] 1 S.C.R. 5, at para. 10; Reference re Remuneration of Judges of the Provincial Court of Prince Edward Island, 1997 CanLII 317 (SCC), [1997] 3 S.C.R. 3, at para. 10.
[83] It follows that the focus of reasonableness review must be on the decision actually made by the decision maker, including both the decision maker’s reasoning process and the outcome. The role of courts in these circumstances is to review, and they are, at least as a general rule, to refrain from deciding the issue themselves. Accordingly, a court applying the reasonableness standard does not ask what decision it would have made in place of that of the administrative decision maker, attempt to ascertain the “range” of possible conclusions that would have been open to the decision maker, conduct a de novo analysis or seek to determine the “correct” solution to the problem. The Federal Court of Appeal noted in Delios v. Canada (Attorney General), 2015 FCA 117, 472 N.R. 171, that, “as reviewing judges, we do not make our own yardstick and then use that yardstick to measure what the administrator did”: at para. 28; see also Ryan, at paras. 50-51. Instead, the reviewing court must consider only whether the decision made by the administrative decision maker — including both the rationale for the decision and the outcome to which it led — was unreasonable.
[86] Attention to the decision maker’s reasons is part of how courts demonstrate respect for the decision-making process: see Dunsmuir, at paras. 47-49. In Dunsmuir, this Court explicitly stated that the court conducting a reasonableness review is concerned with “the qualities that make a decision reasonable, referring both to the process of articulating the reasons and to outcomes”: para. 47. Reasonableness, according to Dunsmuir, “is concerned mostly with the existence of justification, transparency and intelligibility within the decision-making process”, as well as “with whether the decision falls within a range of possible, acceptable outcomes which are defensible in respect of the facts and law”: ibid. In short, it is not enough for the outcome of a decision to be justifiable. Where reasons for a decision are required, the decision must also be justified, by way of those reasons, by the decision maker to those to whom the decision applies. While some outcomes may be so at odds with the legal and factual context that they could never be supported by intelligible and rational reasoning, an otherwise reasonable outcome also cannot stand if it was reached on an improper basis.
[89] Despite this diversity, reasonableness remains a single standard, and elements of a decision’s context do not modulate the standard or the degree of scrutiny by the reviewing court. Instead, the particular context of a decision constrains what will be reasonable for an administrative decision maker to decide in a given case. This is what it means to say that “[r]easonableness is a single standard that takes its colour from the context”: Khosa, at para. 59; Catalyst, at para. 18; Halifax (Regional Municipality) v. Nova Scotia (Human Rights Commission), 2012 SCC 10, [2012] 1 S.C.R. 364, at para. 44; Wilson, at para. 22, per Abella J.; Canada (Attorney General) v. Igloo Vikski Inc., 2016 SCC 38, [2016] 2 S.C.R. 80, at para. 57, per Côté J., dissenting but not on this point; Law Society of British Columbia v. Trinity Western University, 2018 SCC 32, [2018] 2 S.C.R. 293, at para. 53.
E. A Reasonable Decision Is One That Is Both Based on an Internally Coherent Reasoning and Justified in Light of the Legal and Factual Constraints That Bear on the Decision
[99] A reviewing court must develop an understanding of the decision maker’s reasoning process in order to determine whether the decision as a whole is reasonable. To make this determination, the reviewing court asks whether the decision bears the hallmarks of reasonableness — justification, transparency and intelligibility — and whether it is justified in relation to the relevant factual and legal constraints that bear on the decision: Dunsmuir, at paras. 47 and 74; Catalyst, at para. 13.
[102] To be reasonable, a decision must be based on reasoning that is both rational and logical. It follows that a failure in this respect may lead a reviewing court to conclude that a decision must be set aside. Reasonableness review is not a “line-by-line treasure hunt for error”: Irving Pulp & Paper, at para. 54, citing Newfoundland Nurses, at para. 14. However, the reviewing court must be able to trace the decision maker’s reasoning without encountering any fatal flaws in its overarching logic, and it must be satisfied that “there is [a] line of analysis within the given reasons that could reasonably lead the tribunal from the evidence before it to the conclusion at which it arrived”: Ryan, at para. 55; Southam, at para. 56. Reasons that “simply repeat statutory language, summarize arguments made, and then state a peremptory conclusion” will rarely assist a reviewing court in understanding the rationale underlying a decision and “are no substitute for statements of fact, analysis, inference and judgment”: R. A. Macdonald and D. Lametti, “Reasons for Decision in Administrative Law” (1990), 3 C.J.A.L.P. 123, at p. 139; see also Gonzalez v. Canada (Minister of Citizenship and Immigration), 2014 FC 750, 27 Imm. L.R. (4th) 151, at paras. 57-59.
