That's aggravated assault. There is no doubt about that and I don't think we could deny that it is already illegal in Canada.
From what I can see, nothing in the bill amends the Immigration and Refugee Protection Act in terms of mutilation. The only question that could be asked has to do with the genital mutilation practised abroad. That could be the issue at hand. I am not aware of any countries where that is legal and it is not a crime. If it is a crime abroad, it could be a way to impose inadmissibility on someone under section 36.
For instance, right now, under the Immigration and Refugee Protection Act, there are provisions if we have evidence that someone participated in genital mutilation abroad. According to my information, no country has measures that would allow individuals to defend themselves under section 36.