Asser International Sports Law Blog

Our International Sports Law Diary
The Asser International Sports Law Centre is part of the T.M.C. Asser Instituut

Joint Statement from Legal Experts on Genetic Sex Testing in Sport

We, the undersigned legal experts in human rights and sports, issue this statement out of urgent concern about the regressive move toward genetic testing as a precondition of participation in women’s sport. Such eligibility rules, which have already been adopted by several major International Federations—including World Athletics, World Boxing, World Aquatics, and the International Ski and Snowboard Federation—not only conflict with the IOC’s existing guidelines on the matter, but also violate domestic and international laws that protect human rights and regulate the use of genetic testing and genetic information. 


Violations of the IOC Framework

The IOC’s Framework on fairness, inclusion and non-discrimination on the basis of gender identity and sex variationsoutlines fundamental principles to be followed within the Olympic Movement when defining eligibility criteria for the men’s and women’s categories of competition. According to the Framework, any such eligibility criteria should be aimed at ensuring that no athlete has an unfair and disproportionate competitive advantage or at preventing a risk to the physical safety of other athletes. Under the Framework, such an advantage or risk cannot be presumed based on an athlete’s sex variations, physical appearance, or transgender status. It must instead be established based on evidence in the form of robust and peer reviewed research. 

In particular, such evidence should be “based on data collected from a demographic group that is consistent in gender and athletic engagement with the group that the eligibility criteria aim to regulate” and must demonstrate “disproportionate competitive advantage and/or unpreventable risk exists for the specific sport, discipline and event that the eligibility criteria aim to regulate.” Contrary to this evidence-based approach, exclusion based on the presence of the SRY gene constitutes a categorical ban based on a single biological marker, rather than on peer-reviewed research demonstrating that transgender athletes and/or athletes with sex variations have a disproportionate competitive advantage or pose an unpreventable safety risk in specific sporting disciplines.

Moreover, the IOC Framework advises International Federations to prioritize athletes’ health, wellbeing, bodily autonomy, and privacy. Current genetic sex testing rules fail to do so, in violation of numerous domestic and international laws, which we urgently draw attention to below.


Violations of national, regional, and international human rights laws

As several Special Procedures of the UN Human Rights Council have observed, genetic sex testing as a condition of eligibility for women’s sport infringes on athletes’ internationally recognized rights to equality, bodily and psychological integrity, and privacy. 

Further, the IOC, along with the many International Federations based in Europe, must comply with the European Convention on Human Rights. Indeed, the European Court of Human Rights has recognized that the failure of a sport governing body to respect human rights may engage the responsibility of Switzerland under the Convention and, further, that the Swiss Federal Supreme Court must subject female eligibility rules in sport to particularly rigorous review given the seriousness of the personal rights at issue, including privacy, bodily and psychological integrity, economic freedom, and human dignity. 

We consider that mandatory genetic sex testing, and the exclusion of women athletes on this basis, violates Articles 8 (right to respect for private life) and 14 (prohibition of discrimination) of the European Convention. Such violations can only be justified if the eligibility rules are reasonable, necessary, and proportionate, which International Federations bear the burden of proving and which they are currently unable to do. As the European Court of Human Rights recently recognized, the harms of sex testing include the inevitable disclosure of certain athletes’ private and confidential medical information, the potential loss of their livelihoods, and a range of other serious harms. In our view, these consequences—and particularly the social exclusion, psychological distress, physical harm, and material loss that accompany them—cannot be considered reasonable and proportionate to the aim pursued. This is particularly so given the absence of conclusive scientific evidence demonstrating that transgender women athletes or athletes with sex variations have a systematic advantage over other women athletes. 

The exclusion of athletes on the basis of genetic sex testing likewise violates domestic laws, as a Belgian court recently concluded, finding that international cycling regulations barring transgender women were discriminatory, lacking a sound scientific basis, and disproportionate. 


Violations of laws regulating genetic testing and genetic data

Genetic sex testing as a condition of participation in sport also violates numerous national, regional, and international laws, which strictly circumscribe the use of genetic testing and genetic data. 

First, the Convention on Human Rights and Biomedicine, along with the domestic laws of many jurisdictions, prohibit genetic testing unless it serves a health-related purpose, which sex testing rules clearly do not. Some domestic laws place additional restrictions on the range of permissible medical purposes when it comes to minors, however International Federations apply genetic sex testing rules indiscriminately to athletes of all ages. Because of such domestic legal restrictions, athletes in some countries have been pushed to access genetic testing abroad, in less protective jurisdictions.

Second, across jurisdictions, free and informed consent is a fundamental precondition for genetic testing. Not only do individuals below a certain age lack the legal capacity to consent, the consent of an athlete of any age cannot be freely given when it is a condition of sports eligibility. Illustrating this legal principle, the International Declaration on Human Genetic Data specifies that consent to genetic testing is only valid if it is not induced by financial or other personal gain, yet sports eligibility rules do exactly that. While many jurisdictions require the provision of non-directive genetic counselling prior to any testing, this safeguard is nullified by the directive nature of sports eligibility rules. 

Third, domestic and international laws prohibit discrimination based on genetic characteristics, as well as the use of genetic data in ways that stigmatize individuals or groups. Yet genetic sex testing rules do so, first, by targeting only women athletes for testing, and second, by excluding those with a particular genetic trait, resulting in the further stigmatization and marginalization of transgender and intersex people, not only in sport but in society at large.

Fourth, in order to prevent such discrimination, certain jurisdictions specifically prohibit making genetic testing or disclosure of test results a condition of a contract and prohibit anyone other than medical practitioners or researchers, and particularly employers, from requesting or using genetic information. International Federations cannot circumvent these legal restrictions by outsourcing genetic testing to authorities at the national level.

Finally, privacy and data protection laws around the world, including the General Data Protection Regulation(GDPR) afford heightened protection to genetic information. The GDPR prohibits the processing of genetic data, except in very narrow circumstances, such as where the data subject gives explicit, voluntary and informed consent, or where the processing is necessary for and proportionate to reasons of substantial public interest set out in EU or member state law.  Such voluntary and informed consent does not exist for genetic sex testing as athletes are forced to grant consent under the threat of exclusion from sport, and often in circumstances where they are not knowledgeable about the risks of harm that might result from the data processing. There is also no EU or member state law that describes the purported aim of sex testing in sport as a substantial public interest and, even if there was, the data processing in pursuit of that aim would not be necessary and proportionate due to the absence of scientific evidence that women with the SRY gene have a competitive advantage over other women athletes and the significant harms to athletes that can result from genetic sex testing.

The processing of genetic data for sex testing may violate other data protection laws that have been recognized as providing an adequate level of protection similar to the GDPR, such as the data protection laws in Brazil, Canada, Japan, Switzerland and the United Kingdom.


Our Call

We call on the IOC, as it finalises the work to find a “consensus” to “protect the female category”, to reject mandatory genetic testing as a condition of eligibility. We call on International Federations that have already adopted such eligibility rules to withdraw them immediately. And we call on all sport governing bodies to recommit—in practice, not only in policy—to the principles of inclusion and non-discrimination that they have already affirmed.

If international sport governing bodies fail to do so, we call on National Federations to refuse to apply and implement international eligibility rules that violate their respective domestic laws and international legal obligations. Simultaneously, we call on states to urgently review the legality of mandatory genetic sex testing policies that are being applied to athletes and/or at competitions within their jurisdictions. 

We also call on athletes to challenge the national or regional implementation of mandatory genetic sex testing, demanded by the IOC or International Federations, before domestic courts, by invoking national or regional laws protecting human rights, prohibiting anti-discrimination, and regulating the use of genetic testing and genetic data. 

At the same time, we call on courts, particularly the Court of Arbitration for Sport, the Swiss Federal Supreme Court, and ultimately the European Court of Human Rights and the Court of Justice of the European Union, to uphold their duty to ensure a particularly rigorous review of the rules and decisions of the IOC and International Federations, which is compliant with European human rights law and public policy. 

Mandatory genetic sex testing is a stigmatizing and exclusionary policy that lacks democratic legitimacy, scientific grounding, and proportionality between its harms and its aims. It simply has no place in international sport if sport is to be respectful of the values of human dignity, inclusion, fairness, and non-discrimination.  

 

First signatories:

 

Dr. Antoine Duval, T.M.C. Asser Instituut, The Netherlands

Dr. Michele Krech, Toronto Metropolitan University, Canada 

 

 

Signatories

 

1.     Dr. Cem Abanazir, Manchester Metropolitan University, United Kingdom

2.     Rafia Akram, University of Pretoria, South Africa

3.     Dr. Shreya Atrey, University of Oxford, United Kingdom

4.     Francis Awaritefe, lawyer, Professional Footballers Australia (PFA), Australia

5.     Dr. Mathieu Le Bescond de Coatpont, Université de Lille, France

6.     Manon Beury, Geneva Graduate Institute of International and Development Studies, Switzerland

7.     Dr. Audrey Boisgontier, Paris Nanterre University, France

8.     Jensen Brehaut, Osgoode Hall Law School - York University, Canada

9.     Prof. Eva Brems, Ghent University, Belgium

10.  Prof. Erin Buzuvis, Western New England University School of Law, USA

11.  Dr Seamus Byrne, Manchester Law School, Manchester Metropolitan University, United Kingdom 

12.  Prof. Gillian Calder, University of Victoria, Faculty of Law, Canada

13.  Dr. Pieter Cannoot, Ghent University, Belgium

14.  Amritananda Chakravorty, Advocate, India

15.  Jonathan Cooper, University of Gloucestershire, United Kingdom 

16.  Prof. Sharon Cowan, University of Edinburgh, United Kingdom 

17.  Dr. Martine Dennie, University of Manitoba, Canada

18.  Moya Dodd, lawyer, Former Matilda (Australian Women’s Football Team), Australia

19.  Nikki Dryden, lawyer, The Right Collective, Australia

20.  Dr Eleanor Drywood, School of Law and Social Justice, University of Liverpool, United Kingdom

21.  Prof. Maria C Dugas, Schulich School of Law, Dalhousie University, Canada

22.  Prof. Ariel Dulitzky, University of Texas at Austin, School of Law, USA

23.  Dr. Hilary Findlay, Brock University (retired), Canada

24.  Deekshitha Ganesan, Human rights lawyer, Germany

25.  Dr. Ryan GauthierThompson Rivers University

26.  Alexandra Gómez Bruinewoud, Director Legal at FIFPro, The Netherlands

27.  Kaushik Gupta, Senior Advocate High Court at Calcutta, India  

28.  Dr Matthew Harvey, Victoria University Melbourne, Australia

29.  Dina Francesca Haynes, Orville H. Schell, Jr. Center for International Human Rights and Yale University, USA

30.  Prof. Kristin Henrard, Brussels School of Governance, Free University Brussels, Belgium

31.  Dr. Daniela Heerdt, T.M.C. Asser Instituut, The Netherlands

32.  Tim Holden, Solicitor admitted in Australia, Australia

33.  Dr. Lena Holzer, University of Cambridge, United Kingdom

34.  Shubham Jain, University of Cambridge, United Kingdom

35.  Timothy Kajja, Advocate of the High Court of Uganda, Uganda

36.  Dr. Ido Katri, York Institute of Science and Technology, Canada

37.  Prof. Bruce Kidd, University of Toronto, Canada

38.  Prof. Jennifer Koshan, Faculty of Law, University of Calgary, Canada

39.  Prof. Mélanie Levy, Health Law Institute - Faculty of Law - University of Neuchâtel, Switzerland

40.  Marcus Mazzucco, University of Toronto, Canada

41.  Dr. Julie Mattiussi, Associate Professor, University of Strasbourg, France

42.  Pedro José Mercado Jaén, European University Instute, Italy

43.  Alice M. Miller, Global Health Justice Partnership of the Yale Law and Public Health Schools, Yale University, USA

44.  Bárbara Monzerrat Meré Carrión, Legal Counsel at FIFPro, The Netherlands

45.  Dr. Tomáš Morochovič, University of Edinburgh, United Kingdom

46.  Prof. Benjamin Moron-Puech, Université Lumière Lyon 2, France

47.  George Newhouse, Human rights lawyer, Australia

48.  Dr. Matt Nichol, Central Queensland University, Australia

49.  Khayran Noor, International Sports Lawyer, Kenya

50.  Dr Catherine Ordway, University of New South Wales, Australia

51.  Prof. David Pavot, Université de Sherbrooke, Canada

52.  Prof. Debra Parkes, Peter A. Allard School of Law, University of British Columbia, Canada

53.  Dr. Seema Patel, Nottingham Law School, University of Nottingham, United Kingdom 

54.  Prof. Carmen Pérez-González, Universidad Carlos III de Madrid, Spain

55.  Prof. Isabelle Rorive, Université Libre de Bruxelles, Belgium

56.  Mihir Samson, Advocate, India

57.  Dr. Yassine Sangare, King Stage Business School, United Kingdom

58.  Maya Satya Reddy, Former Professional Golfer, founder of the Harvard Law School LGBTQ+ Advocacy Clinic Sports Project, LGBTQ+ Sports Law and Policy Consultant (JD), USA

59.  Kate Scallion, Jones Emery LLP, Canada

60.  Dr. Bérénice K. Schramm, Galatasaray University, Turkey

61.  Jhuma Sen, Advocate, Calcutta High Court, India

62.  Dr. Faraz Shahlaei, LMU Loyola Law School, USA

63.  Dr. Maayan Sudai, University of Haifa, Israel

64.  Prof. Jessica Tueller, University of Oklahoma College of Law, USA

65.  Faranaaz Veriava, University of Pretoria, South Africa

66.  Prof. Ekaterina Yahyaoui Krivenko, University of Galway, Ireland

67.  Dr. Jan Zglinski, LSE Law School, United kingdom

68. Monique Hennessy, ANZLA, Australia

69. Indiradevi Kollipara, Sports and Gaming Lawyer, India

70. David Rutherford, Human rights lawyer, New Zealand 

71. Prof. Alberto Carrio Sampedro, Pompeu Fabra Universiry, Spain

72. Sam Chollet, PhD Candidate, Université de Lausanne, France/Switzerland

73. Daniel Cardona A, Sports lawyer, Colombia

74. Dr. Alice de Jonge, Monash University, InterAction for Health and Human Rights, Australia

75. Dr Aileen Kennedy, UTS Faculty of Law and InterAction for Health and Human Rights, Australia

76. Inês Espinhaço Gomes, Porto Faculty of Law, Universidade Católica Portuguesa, Portugal

77. Dr. Daniel Del Gobbo, Assistant Professor & Chair in Law, Gender, and Sexual Justice, University of Windsor Faculty of Law, Canada

78. Brendan Schwab, Professional Footballers Australia, Australia

79. Dr. Erin C. Tarver, Emory University, Oxford College, USA

80. Dr. Matteo Winkler, HEC Paris, France

81. Isabel Abella Ruiz de Mendoza, Abella Legal, Spain

82. Roland Sètondji Adjovi, UQAM, Canada

83. Prof. Dr. Peter W. Heermann, LL.M, University of Bayreuth, Germany

84. Andrei Kampff de Melo, Lei em Campo, Brazil

85. Megan L. Manion, Yale Law School, USA

86. Dr Andrea Cattaneo, Edge Hill University, United Kingdom

87. Prof. Alessandra Arcuri, Erasmus School of Law, Erasmus University Rotterdam, The Netherlands

88. Gabriel Vieira Terenzi, Centro Universitário Toledo Wyden, Brazil

89. Heather Corkhill, Legal Director, Equality Australia, Australia

90. Carlos J. Zelada, Universidad del Pacífico, Peru

91. Louise Collard, Université du Québec à Trois-Rivières, Canada 

92. Prof. Sarah Joseph, Griffith University, Australia

93. Sven Demeulemeester, Partner, Atfield, Belgium

94. Andrea Florence, Lawyer, Executive Director, Sport & Rights Alliance, Brazil

95. Surbhi Kuwelker, Independent Legal Counsel, Doctoral Candidate, University of Neuchatel, Denmark

96. Prof. Pascal Borry, KU Leuven, Belgium 

97. Clément Lanier, Paris-Nanterre University, France

98. Prof. Machteld Vonk, Faculty of Law, Radboud University, The Netherlands

99. Shoichi Sugiyama, Field-R Law Office / Japan Safe Sport Project, Japan

 

[Online Event] The ECtHR's  Semenya  ruling: A human rights game-changer for the transnational governance of sport? - 13 October 2023

During the 2023/2024 academic year, the Asser International Sports Law Centre will dedicate special attention to the intersection between transnational sports law and governance and gender. This online discussion is the first of a series of (online and offline) events which will explore the way in which international SGBs and the CAS define the gender divide in international sports, police gender-based abuses, and secure gender-specific rights to athletes.


Caster Semenya, a South-African runner and Olympic champion, was dominating her favorite distance, the 800m, for a number of years, when in 2018 the World Athletics (then known as IAAF) adopted a new set of regulations (colloquially known as the DSD Regulations), which imposed new conditions to the eligibility of athletes for certain female competitions, such as the 800m. Semenya, who has a condition known as differences in sex development (DSD), was forced to decide between subjecting to a specific medical treatment aimed at diminishing the level of testosterone in her body or stopping competing on her preferred distance. As she refused to undergo any medical treatment to regain eligibility, she decided to challenge the legality of World Athletics DSD Regulations before the CAS in Lausanne. While the CAS acknowledged that the Regulations were discriminatory and were disregarding the legal sex of Semenya in the name of a so-called sporting sex, the arbitrators also considered that this discrimination was justified and proportionate. Semenya’s challenge against the award was rejected by the Swiss Federal Tribunal (SFT) in August 2020. As a last resort, she decided to lodge an application with ECtHR against Switzerland.


On 11 July 2023, the ECtHR released its judgment in the much-awaited Caster Semenya v. Switzerland case. In short, the Strasbourg Court sided with Semenya and concluded that Switzerland failed to comply with its positive obligations stemming from the European Convention on Human Rights. The ruling is an important milestone in the interaction between the CAS and (European) human rights law. It will likely affect the place of human rights (and in particular the ECHR) at the CAS, the intensity of the supervision exercised by the SFT, as well as the justification of the regulatory decisions of the SGBs. We look forward to discussing these with our two speakers, who have followed closely the case and already blogged (here and here) about the judgment:


The online discussion will be introduced and moderated by Dr. Antoine Duval and Dr. Daniela Heerdt, and will include short presentations by the speakers and a Q&A with the audience.


Registration is available for free at: https://www.asser.nl/education-events/events/?id=4325

12th round of Caster Semenya’s legal fight: too close to call? - By Jeremy Abel

Editor's note: Jeremy Abel is a recent graduate of the LL.M in International Business Law and Sports of the University of Lausanne.

 

1.     Introduction

The famous South African athlete Caster Semenya is in the last lap of her long legal battle for her right to run without changing the natural testosterone in her body. After losing her cases before the Court of Arbitration for Sport (CAS) and the Swiss Federal Tribunal, she filed an application before the European Court of Human Rights (Court). In the meantime, the Court has released a summary of her complaint and a series of questions addressed to the parties of the case.

As is well known, she is challenging the World Athletics’ Eligibility Regulations for the Female Classification (Regulations) defining the conditions under which female and intersex athletes with certain types of differences of sex development (DSDs) can compete in international athletics events. Despite the Regulations emanating from World Athletics, the last round of her legal battle is against a new opponent: Switzerland.

The purpose of this article is to revisit the Semenya case from a European Convention on Human Rights (ECHR) perspective while considering certain excellent points made by previous contributors (see here, here and here) to this blog. Therefore, the blog will follow the basic structure of an ECHR case. The following issues raised by Semenya shall be analysed: the applicability of the ECHR, Semenya’s right to private life (Article 8 ECHR) and to non discrimination (Article 14 ECHR), as well as the proportionality of the Regulations. More...


“Sport Sex” before the European Court of Human Rights - Caster Semenya v. Switzerland - By Michele Krech

Editor's note: Michele Krech is a JSD Candidate and SSHRC Doctoral Fellow at NYU School of Law. She was retained as a consultant by counsel for Caster Semenya in the proceedings before the Court of Arbitration for Sport discussed above. She also contributed to two reports mentioned in this blog post: the Report of UN High Commissioner for Human Rights,  Intersection of race and gender discrimination in sport (June 2020); and the Human Rights Watch Report, “They’re Chasing Us Away from Sport”: Human Rights Violations in Sex Testing of Elite Women Athletes (December 2020).

This blog was first published by the Völkerrechtsblog and is republished here with authorization. Michele Krech will be joining our next Zoom In webinar on 31 March to discuss the next steps in the Caster Semenya case.



Sport is the field par excellence in which discrimination
against intersex people has been made most visible.

Commissioner for Human Rights, Council of Europe
Issue Paper: Human rights and intersex people (2015)


Olympic and world champion athlete Caster Semenya is asking the European Court of Human Rights (ECtHR) to make sure all women athletes are “allowed to run free, for once and for all”. Semenya brings her application against Switzerland, which has allowed a private sport association and a private sport court to decide – with only the most minimal appellate review by a national judicial authority – what it takes for women, legally and socially identified as such all their lives, to count as women in the context of athletics. I consider how Semenya’s application might bring human rights, sex, and sport into conversation in ways not yet seen in a judicial forum. More...







New Event - Zoom In - Caster Semenya v. International Association of Athletics Federations - 31 March - 16.00-17.30 CET

On Wednesday 31 March 2021 from 16.00-17.30 CET, the Asser International Sports Law Centre, in collaboration with Dr Marjolaine Viret (University of Lausanne), is organising its fourth Zoom In webinar on the recent developments arising from the decision of the Swiss Federal Tribunal (SFT) in the case Caster Semenya v. International Association of Athletics Federations (now World Athletics), delivered on 25 August 2020.


Background
The participation of athletes with biological sex differences to international competitions is one of the most controversial issues in transnational sports law. In particular, since 2019, Caster Semenya, an Olympic champion from South-Africa has been challenging the World Athletics eligibility rules for Athletes with Differences of Sex Development (DSD Regulation), which would currently bar her from accessing international competitions (such as the Tokyo Olympics) unless she accepts to undergo medical treatment aimed at reducing her testosterone levels. In April 2019, the Court of Arbitration for Sport rejected her challenge against the DSD Regulation in a lengthy award. In response, Caster Semenya and the South African Athletics Federation filed an application to set aside the award before the Swiss Federal Tribunal. In August 2020, the SFT released its decision rejecting Semenya’s challenge of the award (for an extensive commentary of the ruling see Marjolaine Viret’s article on the Asser International Sports Law Blog).

Recently, on 25 February 2021, Caster Semenya announced her decision to lodge an application at the European Court of Human Rights (ECtHR) against Switzerland on the basis of this judgment. In this context, we thought it important to organise a Zoom In webinar around the decision of the SFT and the pending case before the ECtHR. Indeed, should the ECtHR accept the case, it will be in a position to provide a definitive assessment of the human rights compatibility of the DSD Regulation. Moreover, this decision could have important consequences on the role played by human rights in the review of the private regulations and decisions of international sports governing bodies.


Speakers


Participation is free, register HERE.

How 2019 Will Shape the International Sports Law of the 2020s - By Thomas Terraz

Editor’s note: Thomas Terraz is a fourth year LL.B. candidate at the International and European Law programme at The Hague University of Applied Sciences with a specialisation in European Law. Currently he is pursuing an internship at the T.M.C. Asser Institute with a focus on International and European Sports Law.

 

1.     Introduction

As we begin plunging into a new decade, it can be helpful to look back and reflect on some of the most influential developments and trends from 2019 that may continue to shape international sports law in 2020 and beyond. Hence, this piece will not attempt to recount every single sports law news item but rather identify a few key sports law stories of 2019 that may have a continued impact in the 2020s. The following sections are not in a particular order.More...

Caster Semenya’s Legal Battle Against Gender Stereotypes: On Nature, Law and Identity - By Sofia Balzaretti (University of Fribourg)

Editor's note: Sofia Balzaretti is a Graduate research assistant and a PhD candidate at the University of Fribourg (Switzerland) where she is writing a thesis on the Protection against Gender Stereotypes in International Law. In addition to research in human rights and feminist legal theory, she has also carried out some research in legal philosophy and on the relationship between gender and the law.

 

The International Association of Athletics Federations (IAAF), the monitoring body of track and field athletics, regularly submitted South African middle distance runner and Olympic gold medalist Mokgadi Caster Semenya to sex verification tests when it began questioning her sexual characteristics and speculating whether her body belonged on the Disorder of Sex Development (DSD) spectrum. DSD Syndrome is often defined as an “intersex condition” which affects the clear development of either/or genitalia, gonads and chromosomes into one distinctive sex or another. The spectrum of the intersex condition is particularly wide, and the disorder can sometimes be minimal - some cases of female infertility can actually be explained by an intersex condition.

The IAAF deemed the controversial sex verification tests necessary on the grounds that it was required to prove Semenya did not have a “medical condition” which could give her an “unfair advantage”. It was eventually found that, because of an intersex trait, Semenya did have abnormally high levels of testosterone for a woman, which, in the IAAF’s opinion, justified a need for regulatory hormonal adjustments in order for her to keep competing in the women’s category. The IAAF also funded research to determine how ‘hyperandrogenism’ affects athletic performance. In 2018, it issued Eligibility Regulations on Female Classification (“Athlete with Differences of Sexual Development”) for events from 400m to the mile, including 400m, hurdles races, 800m and 1’500m. The IAAF rules indicated that in case of an existing high level of testosterone, suppression or regulation by chemotherapy, hormonal castration, and/or iatrogenic irradiation was mandatory in order to take part in these events.

Semenya and her lawyers challenged the IAAF Regulations in front of the CAS, who, in a very controversial decision, deemed the Regulations a necessary, reasonable and proportionate mean “of achieving the aim of what is described as the integrity of female athletics and for the upholding of the ‘protected class’ of female athletes in certain events” (§626). More...