The judicial system remains the final arbiter of whether or not what the government did was within the confines of the act. That doesn't preclude other scrutiny by Parliament or by other groups in looking at whether it was appropriate. That would include, for example, the review committee that gets established after the fact and has to respond within 360 days. It's not exclusive, but clearly should the courts find that the government acted in a way that was not legal, that didn't meet the threshold of the act, then obviously their decision is final.
On March 29th, 2022. See this statement in context.