It all comes down to a clash of worldviews between those who believe that "woman" and "man" are determined by each individual's self-declaration, and those who

It all comes down to a clash of worldviews between those who believe that "woman" and "man" are determined by each individual's self-declaration, and those who hold that "woman" and "man" are categories based on being, respectively, of the female or male sex. There's no right or wrong answer to this, so it's not really appropriate to enforce via a Code of Conduct.