The recent decision by World Boxing to declare boxer Lin Yu-ting eligible to compete in the women’s category, following a process that included genetic testing, medical review and structured evaluation, does not close a case: it opens a debate. Because beyond the outcome, what it reveals is something deeper. It is not so much about who competes, but under what rules that decision is made. And, above all, whether those rules remain the same.

The process existed. There were genetic tests, medical evaluations and a structured procedure. On paper, everything seems to respond to a reliable technical standard, but the outcome introduces a fracture in that objective biological criteria are no longer, on their own, determinative.

The silent shift in hierarchy

For decades, women’s sport has operated under the principle that fair competition is based on biological sex. That was the framework, the line that defined the category. Today, however, that principle appears to be being reinterpreted through internal policies, legal risk management and margins of institutional discretion.

It is not that there is no process. It is that the order of factors has changed. Where there were once clear rules, case-by-case evaluation is now beginning to prevail. And that shift, seemingly technical, has deep consequences. Because when each situation is analysed individually, consistency ceases to be a guarantee and becomes an aspiration.

The problem is not only scientific. It is, above all, regulatory. A credible sports system needs more than procedures, it needs predictability. To know what is assessed, how it is assessed and with what weight. When criteria become open to interpretation, the system becomes vulnerable. To doubt, to discrepancy and, inevitably, to conflict. And that leads to the erosion of competitive integrity, exposure to litigation and a gradual loss of confidence among those within the sporting ecosystem.

The role of the IOC

In recent years, the role of the International Olympic Committee has been to decentralise decision-making and delegate it to international federations. In theory, this allows rules to be adapted to the reality of each sport. In practice, it has created an uneven landscape, with different criteria depending on the discipline. And in matters as sensitive as eligibility in women’s sport, this fragmentation is not neutral. It introduces uncertainty, dilutes responsibility and makes it harder to build a common framework.

The IOC is now called upon to define a clear, coherent and applicable framework. Not as a recommendation, but as a real reference point. Because what criteria will govern eligibility in women’s sport from now on? Will biological factors be the central axis or just one among several variables? How will consistency across federations be ensured? Who assumes responsibility when that consistency does not exist?

An issue that remains unresolved

The latest decision by World Boxing has reignited the debate, placing on the table questions that can no longer be avoided and that affect the very foundation of competitive sport: its integrity, its legitimacy and its legal certainty. When rules are not clear, competition ceases to be unquestionable. And when competition is open to dispute, the system begins to crack.

International sport now faces an uncomfortable but inevitable choice: to establish clear, firm and lasting criteria… or to accept that the rules will continue to depend on shifting interpretations.