What are some exceptions to the general rule of a court on judicial review not receiving evidence?

In Association of Universities and Colleges of Canada v. Canadian Copyright Licensing Agreement, 2012 CAF 22 at para 20, the court identified three exceptions to the general rule of a court on judicial review not receiving evidence: • background information that will assist the court in understanding the issues on judicial review; • to bring forward procedural defects that cannot be found in the record; and • to highlight the absence of evidence before an administrative tribunal.