I did spend the time reading the paper. I am trying to understand. It doesn't answer my questions, which is why I am asking.

I still don't understand why this invalidates the trans-racial option. If a white man sincerely believed he was black, went through medical procedures changing his skin tone, received surgery to alter his appearance and "passed" as a black man, and no one noticed him as anything other than a black man, would that make him black?

I would say no, because he was born to white parents and he has simply gone through a series of medical procedures that has altered his appearance. What I don't understand is why this isn't allowed within the framework of transgender/queer thought? If this man sincerely believed he was black, upon what basis would we deny him this claim?