The Jurisdiction of the Tax Court: A Tax Practitioner's Guide to the Jurisdictional Galaxy of Constitutional Challenges
Bibliographic record
Abstract
One of the remaining live issues relating to the Tax Court of Canada's exclusive jurisdiction concerns constitutional challenges of taxing provisions, particularly charging provisions. While it is clear that the Tax Court can consider the constitutionality of a charging provision brought into play within an assessment, the extent of the court's exclusive jurisdiction to rule on the constitutionality of such a provision, to the exclusion of other superior courts, is less clear.This issue was addressed in the decision in Canada v. Domtar Inc. While the context in that case was the charging provision of the Softwood Lumber Products Export Charge Act, 2006, the decision has a broad impact on any federal tax appeals that are subject to the Tax Court's exclusive jurisdiction under section 12 of the Tax Court of Canada Act. This article uses the Domtar decision as a starting point to explore the possibility of constitutional challenges of taxing legislation in courts other than the Tax Court. In so doing, it considers the impact of recent decisions of the Supreme Court of Canada relating to competing jurisdictional schemes outside the tax context, some of which specifically address the jurisdiction of superior courts to hear constitutional claims. The article attempts to reconcile the notion of the Tax Court's exclusive jurisdiction over tax appeals with the traditional authority of the Federal Court and the provincial superior courts to adjudicate constitutional claims. It concludes that the issue of the constitutionality of a charging provision must generally be resolved by the Tax Court to the exclusion of these other superior courts, and that any residual jurisdiction of provincial superior courts over such a question ought to be, at best, very narrowly construed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.010 | 0.020 |
| Meta-epidemiology (narrow) | 0.001 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.007 | 0.008 |
| Science and technology studies | 0.015 | 0.031 |
| Scholarly communication | 0.013 | 0.018 |
| Open science | 0.005 | 0.007 |
| Research integrity | 0.015 | 0.023 |
| Insufficient payload (model declined to judge) | 0.012 | 0.005 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".