A Watershed Moment in Elite Sport: the IOC’s New Transgender Athlete Policy

After extensive deliberation and consultation with a working group consisting of specialists in sports science, endocrinology, transgender medicine, sports medicine, women’s health, ethics and law, the International Olympic Committee (IOC) has handed down one of the most consequential rulings in the governance of elite sport in history.

On 27 March 2026, the IOC Executive Board approved its new Policy on the Protection of the Female (Women’s) Category in Olympic Sport and Guiding Considerations for International Federations and Sports Governing Bodies (the Policy). The Policy is effective from the next Summer Olympics in Los Angeles. As sports law practitioners, the implications both legal, ethical and cultural, demand specific attention.

The Policy

The Policy restricts eligibility for women’s events at IOC competitions to “biological females” (as defined in Schedule 1 of the Policy). This is determined through a one off “SRY Gene screening” conducted via a swab, saliva or blood sample.

Any athlete who tests positive for the SRY Gene, which is a genetic marker closely associated with male sex development, will be ineligible to compete in the women’s category, with a narrow exception carved out for athletes diagnosed with Complete Androgen Insensitivity Syndrome (CAIS) or a certain other differences of sex development (DSDs), as it is currently believed such individuals do not benefit from testosterone’s performance enhancing effects.

The Policy is retroactive and, does not apply to grassroots or recreational sport.

Interestingly, as part of the deliberations leading to the Policy the IOC conducted an online athlete survey receiving over 1,000 responses. This survey and the associated athlete consultations, revealed “a strong consensus that fairness and safety in the Female Category requires clear, science-based eligibility rules, and that protecting the Female Category is a common priority.” Such sentiment has been shared amongst Olympians, Collegiate and professional athletes.

This marks a seismic departure from the IOC’s 2021 framework. which largely delegated eligibility decisions to individual International Federations (IFs), producing a fragmented and inconsistent regulatory landscape that frustrated athletes, coaches and national bodies alike.

Development of this Matter

The IOC has not moved in isolation. For several years, major international sporting bodies had already been navigating this terrain independently. World Aquatics (FINA) some of the strictest early restrictions, permitting transgender women to compete in women’s events only if they transitioned before the age of 12 or before Tanner Stage 2 of puberty (generally age 11 – 12 in boys). World Athletics adopted SRY gene screening as its eligibility mechanism ahead of the 2025 World Championships in Tokyo. World Rugby had maintained an outright ban on transgender women in international women’s competition, while cycling’s governing body introduced stringent testosterone thresholds.

At a domestic level in the United Kingdon, the Rugby Football Union (RFU), British Rowing, British Cycling, UK Athletics, and the Football Association have all introduced restrictions to varying degrees. In the United States, President Trump’s February 2025 executive order directed federal resources away from institutions permitting transgender women to compete in women’s sport, prompting the US Olympic and Paralympic Committee to align its guidance accordingly.

Litigation, Science and the Court of Arbitration for Sport (CAS)

From a sports law perspective, the decision raises significant legal questions. IOC President, Kirsty Coventry acknowledged that the Policy may be challenged at some point in the future. Athletes have previously mounted successful or near successful challenges in the CAS, including Caster Semenya and Dutee Chand, both of which challenged gender eligibility rules relating to naturally elevated testosterone.

The scientific basis of the policy is also not without vulnerability. Andrew Sinclair, the scientist credited with discovering the SRY gene in 1990, has publicly questioned its use as a sole determinant of biological sex, arguing that its presence tells nothing about how testosterone actually functions in a given body. This gap between the genetic market and its physiological expression may prove to be grounds for legal challenge.

Furthermore, the IOC’s policy document acknowledges that the male performance advantage over biological women is 10-12% in most running and swimming events, 20% in throwing and jumping disciplines and potentially greater than 100% in events that involve explosive power. Notwithstanding this, the Policy does not grapple with the significant individual variation within these ranges, or with athletes who transitioned before or early in puberty.

Human Rights Concerns

Any analysis of this decision must confront its human rights dimensions. Transgender people already face significant marginalisation in public life, and sport has historically not been a safe or welcoming space for gender diverse individuals. Research examining the AFL’s policy development process found that transgender women often self-exclude from sport altogether due to unsafe and unwelcoming environments.

As noted by Nikki Dryden, former Olympic Swimmer turned Human Rights and Sports Lawyer, should the Policy be adopted at lower levels of sport, it creates a culture in which coaches, officials, or parents could feel entitled to question whether a girl or women :”looks female enough” to compete. This is counter-intuitive with the purpose of the Policy being to protect women’s sport. The concern is not merely theoretical. Sex verification regimes have a troubled history in Olympic sport, from invasive gynaecological examinations in the early decades of elite competition through to chromosome testing, the IOC dropped mandatory sex screening in 1999 precisely because of the harm it caused to athletes, many of whom were never transgender.

The Universal Declaration of Human Rights recognises that all people are equal in dignity and rights. Australia’s own Sex Discrimination Act 1984 (Cth) and state based anti-discrimination legislation provide prtections on the grounds of gender identity. The Australian Human Rights Commission’s (AHRC) guidelines on transgender and gender diverse inclusion in sport explicitly cautioned against exclusion and discrimination. As human rights advocates have already warned, since the IOC’s announcement, mandatory genetic testing and blanket bans of the kind the IOC has adopted may, if applied beyond elite Olympic context, conflict directly with Australia’s anti-discrimination framework, the National Integrity Framework and safeguarding obligations owed to child athletes.

The Australian Context

For Australians, the Policy carries significant importance. Sport is not merely recreation, it is a matter of identity and cultural infrastructure. From junior sports on the weekend to evening trainings on suburban ovals, sport is woven into the fabric of Australia social life in a way that is difficult to overstate. Sports Australia National Sport Plan, Sport 2030, expressly recognises that “successful societies are inclusive societies.”

Voluntary sporting associations, are not currently bound by the IOC’s policy. The IOC has explicitly stated that its rules do not apply to grassroots or recreational sport. However, the symbolic weight of an IOC decision and its persuasiveness cannot be understated. Governing bodies look to the Olympic movement for legitimacy and direction. If peak bodies and state sporting associations adopt similar frameworks without careful legal and ethical scrutiny, the practical effect could be to preclude transgender women form meaningful participation in sport at virtually every level.

The Australian Institute of Sport’s guidelines have historically advocated an evidence based, individualised approach rather than blanket exclusions. This kind of framework, many argue is more proportionate and legally defensible. The question is now whether that considered approach can withstand the gravitational pull of the IOC’s new global standard.

Concluding Remarks

The Policy is a landmark decision in the governance of women’s sport. Whether one views it as a necessary and overdue protection of the female category, or as an overreach that risks causing serious harm to a vulnerable community, what is beyond dispute is that it will reshape sports governance, policy drafting, eligibility litigation and anti-discrimination law across the world.

For Australian sporting bodies, both professional and voluntary, the focus must be to resist the temptation of reflexive adoption of an elite level framework in contexts where it does not belong, and where it may not be lawful. The principle that sport should start from a place of inclusion is not just an ethical aspiration, in Australia, it may be a legal requirement.

The content in this Article is intended only to provide a summary and general overview on matters of interest. It is not intended to be comprehensive nor does it constitute legal advice. It should not be relied upon as such. You should seek legal or other professional advice before acting or relying on any of the content.

The solicitors at BlackBay Lawyers can provide specialised and detailed advice for athletes and their advisors. If you require advice, please feel free to contact BlackBay Lawyers on (02) 8005 3077 or via www.blackbaylawyers.com.au for a confidential discussion with one of our solicitors.

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ABOUT THE AUTHOR

Michael Wells joined BlackBay Lawyers having retired from a professional rugby career spanning over a decade. He brings the meticulous attention to detail and results driven approach that is required in elite sport to his legal practice.

Prior to joining BlackBay, Michael worked as a Lawyer for Ashburton Services, the legal team servicing the entire investment portfolio of Tattarang and the Minderoo Foundation. This role allows Michael to leverage the knowledge gained across a diverse range of legal matters to accommodate various client matters including: commercial matters, corporate law and regulatory advice, property and employment.