Washington SB5012

Interschool athletic activities [...] must be organized using the following groupings for the purposes of participation and competition: (a) Students who have the same kind of sex chromosome (xx) who identify as a woman or girl; (b) Students who have the same kind of sex chromosome (xx) who identify as a man or boy; (c) Students who have two different kinds of sex chromosomes (xy) who identify as a man or boy; (d) Students who have two different kinds of sex chromosomes (xy) who identify as a woman or girl