Montana Senator Carl Glimm (R) has presented Senate Bill 458 which would define an individual’s sex according to the functioning of the person’s reproductive system biologically. Glimm states, “Gender obviously means something different than biological sex. Biological sex is immutable. You can’t change it.” The proposed bill explains a male is a person born with a male reproductive system, and a female is a person born with a female reproductive system. The bill is facing opposition from Democrats and the transgender community.