Interschool athletic activities and other interschool extracurricular activities of an athletic nature, including those administered by a school district board of directors under RCW 28A.600.200, 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;16 (c) Students who have two different kinds of sex chromosomes (xy) identify as a man or boy; (d) Students who have two different kinds of sex chromosomes (xy) who identify as a woman or girl; and (e) Students who do not meet the criteria in (a) through (d) of this subsection. (2) For the purposes of this section, a student's eligibility for a particular grouping may be determined by any medical documentation that demonstrates the chromosomal makeup of the student.