Only if your definition of race comes from the 19th century, which in itself is a little racist.
If you wish to redefine the meaning of "race" (or "sex" for that matter), you need to change the law that bans discrimination based on it.
Because, unless the law has explicitly changed in between — as in, passed by Legislature and signed by the Executive — what was legal at one point shall remain legal at another.
These days race is a social or cultural construct
Funny, this argument — But I identify as Black! — didn't help certain Ms. Dolezal keep her job at, of all places, NAACP... Evidently, some races — whatever the term means — are more equal than others. Had she been fired for being Black while masquerading as White, she and her team of lawyers would've all been millionaires by now.