> Zzyym was born with ambiguous physical sexual characteristics but was raised as a boy and had several surgeries that failed to make Zzyym appear fully male, according to court filings.

I support having an "Other" or "X" for the rare few individuals in the intersex category, but the underlying policy change and this article itself group up or conflate intersex with nonbinary and transgender, which makes me think this is more about pushing progressive gender identity politics rather than serving a utilitarian purpose. I don't think nonbinary or transgender people should be declared as "X". The passport specifically has a field labeled "sex". "Sex" means biological sex, and to most people on the planet, even "gender" is the same as "sex". This line on the passport is not meant to be a place to feature "gender identity". It is meant to be immutable to serve as identification. Sex is immutable, whereas "gender identity" is something more like personality, given that there are many that claim they are gender fluid and can have a gender identity that is different day to day, and given that a large proportion of people who feel they might be transgender in their youth end up actually being gay or lesbian.