Thank you for the question.
The CBSA's mandate for detention, as you know, is set out in the IRPA. There are three grounds that allow CBSA to detain individuals: their identity is unknown; they represent a danger to Canada; or they represent a flight risk—in other words, they're unlikely to appear for an immigration hearing or process.
That's the foundation for the CBSA's detention program. The program, as you know, is subject to the review of the quasi-judicial Immigration and Refugee Board that ensures that detention decisions are reviewed on a regular basis and that individuals are detained only when strictly necessary in the protection of the safety and security of Canada.