It really doesn't allow _any_ rights to be overridden. It's rather clear in its scope,[0] and while it's true that our justice system has taken the Government to task when it has exceeded the scope[1] it's not as though this is a regular occurrence or that those harmed by the excess are without legal recourse.

0: https://laws-lois.justice.gc.ca/eng/acts/e-4.5/page-1.html

1: https://www.justice.gc.ca/eng/trans/bm-mb/other-autre/emerge...