"For the sake of this policy, biological sex is defined by distinguishing characteristics and can be supported by birth certificate or signed affidavit," the NAIA said in its April policy. "While rare, there have been cases where the sex assigned at birth does not match the biological sex, which led to the use of biological sex in this document."
NCAA accused of allowing loophole for transgender athletes with updated policy
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National Association of Intercollegiate Athletics, the governing body for mostly small colleges, announced a policy Monday that all but bans transgender athletes from competing in women's sports.
NAIA all but bans transgender athletes from women's sports. NCAA vows to ensure 'fair competition'
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