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ARTICLE · 06 JUNE 2025

A Unanimous Supreme Court Ruling Affirms Langlois' Position

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Langlois Lawyers celebrates the decision secured for its clients before the Supreme Court of Canada, which unanimously concluded that Québec's Private Security Act does not apply...

CanadaTransport
Sean Griffin
Sean Griffin
Geneviève Claveau
Geneviève Claveau
Jean-Philippe Dionne
Jean-Philippe Dionne
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Langlois Lawyers celebrates the decision secured for its clients before the Supreme Court of Canada, which unanimously concluded that Québec's Private Security Act does not apply to certain federally regulated enterprises. In the case of Opsis Airport Services Inc. v. Quebec (Attorney General) [2025 SCC 17], Langlois represented Quebec Maritime Services Inc. (QMS), a company in the maritime transportation sector, along with one of its employees.

A landmark decision on division of power

The dispute concerned the applicability of a provincial law to enterprises engaged in airport and maritime security―fields falling under federal jurisdiction. Alongside Opsis Airport Services Inc., which provides security operations at Montréal-Trudeau International Airport, QMS and its employee contested violation notices alleging they had failed to comply with Québec's Private Security Act (PSA).

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