Republican Nassau County Executive Bruce Blakeman announced Thursday that he will use an executive order to ban transgender athletes from competing in events that align with their gender identity at county-run facilities.

The executive order states that sports leagues, organizations, teams and other entities in Long Island County must expressly designate teams based on the athlete’s sex assigned at birth, when applying for a “use and occupancy” permit on a property. of Nassau County Parks for a competition or sporting event at all levels.

No permits will be granted for any event or competition that allows transgender women or girls to compete in girls’ or women’s sporting events. The order allows transgender men and boys to play in men’s and boys’ competitions.

The measure goes against the guidelines of local and national sports associations.

The New York State Public High School Athletic Association’s transgender policy states that it is “committed to providing all students the opportunity to participate… in a manner consistent with their gender identity and the Regulations of the Commissioner of Education of the State of New York.”

The National Collegiate Athletic Association’s transgender guidelines vary from sport to sport. Transgender student-athletes typically need to document sport-specific testosterone levels at the beginning of their season and a second documentation six months later, and then another documentation four weeks before championship selections.

PHOTO: The transgender flag is seen during the New York City Gay Pride Parade on June 26, 2022 in New York City.

The transgender flag is seen during the New York City Gay Pride Parade on June 26, 2022 in New York City.

Noam Galai/Getty Images, FILE

Governing bodies of several national and international sports leagues, including the International Olympic Committee, require transgender women to reach certain hormonal levels in order to play on sports teams with cisgender women.

According to health experts, there is no clear data on whether transgender women have a physiological advantage.

A study published in the British Journal of Sports Medicine found that 46 trans women’s athletic advantages over their cisgender counterparts decreased with feminizing therapy. However, this study also found that they had a 9% faster average running speed than cisgender women after a one-year period of testosterone suppression. A different study in the American Journal of Sports Medicine found that there is still no direct or consistent research to suggest that transgender women have an athletic advantage at any stage of their transition.

Experts wrote in a recent JAMA Pediatrics editorial that preventing trans youth from participating in school sports could be bad for the physical and mental health of a population already at risk because they lose the developmental benefits of sports participation.

Restrictions on hormone levels have affected athletes with differences in sexual development, including track star Caster Semenya, who was born intersex and has naturally high levels of testosterone.

PHOTO: Nassau County, New York Executive Bruce Blakeman speaks at a Long Island Association (LIA) event on January 5, 2024 in Woodbury, New York.

Nassau County, New York Executive Bruce Blakeman speaks at a Long Island Association (LIA) event on January 5, 2024 in Woodbury, New York.

Howard Schnapp/Newsday via Getty Images

Blakeman, a Republican, said he believes designating separate athletic teams or sports based on sex assigned at birth “is necessary to maintain equity in women’s athletic opportunities.”

“Women’s and girls’ hard work, achievements on the field, and athletic futures deserve to be encouraged, nurtured, and celebrated,” Blakeman stated in the executive order.

Local civil rights groups, including the New York Civil Liberties Union, argued that the executive order is illegal.

“Requiring trans girls to compete on boys’ teams completely excludes them from sports,” the NYCLU said in a statement to ABC News. “Participating would mean being discovered and denied the same opportunities that other girls enjoy: to challenge themselves, improve their fitness and be part of a team of their peers.”

By Sam