If this amendment were not passed, then the bill would come into force, I believe, upon royal assent. Delaying the coming into force of the bill for 30 days gives the provinces and territories some time to familiarize themselves with the law to put anything in place that they need to do to facilitate their operations. It's something that they very much appreciate. Otherwise, the law changes overnight, and the people in the justice system are not necessarily there. It just gives everybody time to inform themselves of their obligations and how best to implement the new laws.
On May 13th, 2022. See this statement in context.