Then no matter whether SCC approves the bill or not, the bill will pass and be enforced in next five years IMHO ...
Feel free to correct me if I am wrong, thanks bros!
You don't get to 'call a Notwithstanding' after the fact. You write it into your bill when you propose it. No government wants to open debate by saying, "Even though this law tramples on people's Charter rights, we're going ahead". Some might even believe in the Charter, and think their law would pass the test. Either or both might be why there is no 'notwithstanding' clause in C36.
Now that they've confidently put it forward, it seems unlikely they'd admit they'd overlooked the possibility of a successful Charter challenge by adding that clause as an amendment. And I sure can't imagine the opposition parties helping them out by proposing one. Although I suppose they might do it for the embarrassment potential.
I believe Québec has included notwithstanding wording in every statute pretty much since the Constitution was adopted, but as a SOP to assert its independence, and not to protect bad legislation, except maybe for the language laws.