I'm going to answer in English, if it's okay with you. I apologize, but it will be easier for me.
It's an excellent question. I think, though, we'll have to remember that there are two parts to the definition, and that the intervention really has to amount to “a practice, treatment or service”.
We heard the minister explain the meaning behind those terms and what they imply during his opening remarks before this committee. They do require some kind of formalized intervention, so merely saying to your male child, as you have suggested, “You can't wear a skirt to school” would not amount to “a practice, treatment or service”, and therefore, in my view, would not be caught by the definition, including its expanded version.