Question juridique clé
Whether the constitutional complaint was admissible insofar as it attacked matters reviewable only by appeal.
Solution extraite
Several complaints concerned federal substantive law or non-cognizable review issues and therefore could not be examined in the constitutional complaint.
Motifs extraits
The court applied the principle of absolute subsidiarity and held that challenges to legal characterization, burden of proof, and certain factual findings had to be raised in the parallel appeal, not by constitutional complaint.