Quote Originally Posted by danhibees1875 View Post
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Excuse any ignorance in this question... it looks like it recognises a 3rd sex (As opposed to gender, where there's a wider recognition of more than two) - or is there more to it?
Maggie Chapman was talking about non-binary, which is a gender issue. Here's a useful starting point:-

https://en.m.wikipedia.org/wiki/Legal_recognition_of_non-binary_gender