The appellant, a qualified plasterer, was charged with working in the construction industry without a classification certificate contrary to Regulation No. 5.
He argued the regulation was ultra vires and adversely affected his vested rights.
The Supreme Court of Canada dismissed the appeal, upholding the Court of Appeal's finding that the regulation was valid and that the vested rights argument failed given the statutory duty imposed on the Office de la construction du Québec to adopt hiring standards.
