Canada's use of emergency powers 'unjustified' - judge
In a decision on Tuesday, Judge Richard Mosley also said it violated Canada's rights charter.
The federal government said it will appeal the decision.
The Emergencies Act bestows the government with added powers in times of crisis.
Prime Minister Justin Trudeau invoked it on 14 February 2022, three weeks into protests that gridlocked the capital.
Dubbed the "Freedom Convoy", the protest against the government's Covid-19 vaccine mandate gained international attention as hundreds of demonstrators settled in for weeks around Ottawa's Parliament Hill, many in trucks.
