Section 18.1(4) of the Federal Court Act, RSC 1985, c F-7, states that the grounds for judicial review are:
The Federal Court may grant relief under subsection (3) if it is satisfied that the federal board, commission or other tribunal
(a) acted without jurisdiction, acted beyond its jurisdiction or refused to exercise its jurisdiction;
(b) failed to observe a principle of natural justice, procedural fairness or other procedure that it was required by law to observe;
(c) erred in law in making a decision or an order, whether or not the error appears on the face of the record;
(d) based its decision or order on an erroneous finding of fact that it made in a perverse or capricious manner or without regard for the material before it;
(e) acted, or failed to act, by reason of fraud or perjured evidence; or
(f) acted in any other way that was contrary to law.
Based its Decision or Order on an Erroneous Finding of Fact in a Perverse or Capricious Manner
In Rahal v Canada (Minister of Citizenship and Immigration), 2012 FC 319, Justice Gleason provided the following guidance on interpreting s. 18.1(4):
In the seminal case interpreting section 18(1)(d) of the FCA, Rohm & Haas, Chief Justice Jacket defined “perversity” as “willfully going contrary to the evidence” (at para 6). Thus defined, there will be relatively few decisions that may be characterized as perverse.
The notion of “capriciousness” is somewhat less exacting. In Khakh v Canada (Minister of Citizenship and Immigration), (1996), 116 FTR 310,  FCJ No 980 at para 6, Justice Campbell defined capricious, with reference to a dictionary definition,Read more ›