A major organization that governs collegiate athletics in the United States has unveiled a new policy prohibiting trans-identified male athletes from competing in women’s sports amid the Trump administration’s crackdown on gender ideology.

The new policy, which is effective immediately, limits competition in women’s sports exclusively to athletes assigned female at birth.

Announced on Thursday, the National Collegiate Athletic Association said its policy applied to all athletes and was effective immediately. The policy change came the day after President Donald Trump signed an executive order preventing transgender women from competing in female categories of sports.