To be very clear, people who are placed in quarantine are not being placed in detention. They're not being arrested, and they're not in custody. They're ordered into isolation to quarantine under the Quarantine Act, and therefore this is not a designation where an individual is arrested. As you probably are aware, under the Constitution and under a significant amount of case law, there is a constitutional requirement to provide a person who is being arrested with information about their rights to retain counsel, etc., but these are not circumstances of custody and detention. Rather, it's quarantine under the Health Act.
On March 10th, 2021. See this statement in context.