Again, I would just repeat that I can't make predictions as to how the tribunal would interpret a particular term. It's an emerging area of the law.
As you know, provincial governments—in Ontario, for example—have added the terms “gender identity” and “gender expression”. In Manitoba, “gender identity” has been added. Those provincial tribunals will no doubt develop case law.
The other legal point to make is that with respect to all of the other grounds in the bill, the word “expression” is not actually mentioned. With religion, for example, one may express one's religion through the wearing of a veil or some other religious emblem, and that expressive content is understood to be covered under the ground, but again I cannot make a prediction about what the tribunal will or will not cover in a particular situation.