The taxpayer's tax appeal was based on an alleged exemption, in an aboriginal treaty ("Treaty 8"), from all taxation. The motions judge found that he was bound by the legal finding in Benoit that there was no such exemption in Treaty 8, and granted the Minister's motion to strike references to Treaty 8 from the taxpayer's pleadings.
Webb JA reversed the motion judge's decision. Benoit made a factual conclusion, on whether "the Aboriginal signatories understood that they would be exempted from taxation for any reason," finding that there was "insufficient evidence" to support this view - therefore, the question was not whether stare decisis applied on the findings of law in Benoit, but rather whether issue estoppel applied on the findings of fact (para. 21).
Issue estoppel did not apply. Although the issue was the same, there was no evidence that any litigant in Benoit was the present taxpayer or his privy.