Incorrect. The notwithstanding clause is explicitly a temporary measure related to provisions 2 and 7-15 of the Charter of Rights and Freedoms. It's not some magic "I don't like this law" button.

What the Ontario government is trying to create is a way to bypass provincial and municipal laws by designating a piece of terrain a special zone.

To use an analogy, let's say smoking bans came in as a Charter right rather than how they did. A controversial ban at the time, but widely reflected as a good move now. The right to clean air of something. Ontario could go "Hey, we grow a lot of tobacco, and we have a rich history of blowing smoke in each other's faces at Tim Hortons. So we're going to enact the not withstanding clause." That buys Ontario a couple of years to figure out how to work the ban into its existing laws and culture.

This bill would be akin to Ontario saying "Okay, I know smoking is allowed everywhere except kindergartens and hospitals. And some municipalities have also banned smoking grade schools. So we're proposing a special bill that will allow use to declare special smoking regions, which will allow people to smoke everywhere regardless of our, or cities, regulations"