Alaska HB40

Athletic team and sport designation. [...] A student who participates in an athletic team or sport designated female, women, or girls must be female, based on the participant's sex. A school may rely on the sex listed on a participant's original birth certificate issued at or near the time of birth to establish a participant's sex. In this subsection, "sex" means the biological state of being male or female, based on an individual's nonambiguous sex organs, chromosomes, and endogenous hormone profile at birth.

Having separate sex-specific teams furthers efforts to promote sex equality and that discrimination against women and girls in sports is counter to that effort.