Mackinnon v. Canada (Attorney General)
The appeal was moot because the specific dispute (prorogation of the 44th Parliament) had been extinguished by dissolution and a new Parliament, but the Court exercised its discretion to hear the appeal on the merits because an adversarial context remained, the issues are of significant public importance and evasive of review, and adjudication falls within the proper judicial function.
Source excerpt
- Prorogation
- Prerogative powers
- Justiciability
- Judicial review
- Mootness