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In the context of law it typically means protection from discrimination.

Enumerating protected rights is the easiest way to protect them.

so you could sue someone for not calling your the right pronoun (ze/zhe)

I would really doubt that, actually, but I suppose it could qualify as a hostile work environment.

You're so wrong about this that an organization representing 36,000 Canadian lawyers took the time to write a letter explaining you're wrong.