Even HB2 doesn't say that. It simply defines sex as what's on your birth certificate. So if you live in a state that allows you to change your birth cert (sometimes with just a letter from a doctor confirming your gender identity) then HB2 doesn't prevent you from going into the women's in NC even with male genitalia. So the stupid law doesn't even do what its proponents claim it's trying to do (keep 'men', i.e. people with penises, out of women's washrooms).