Anti-doping law occupies a unique position in the broader landscape of sports law: it operates through a quasi-judicial system with its own tribunals, its own evidentiary standards, and its own relationship to civil liberties that sits uncomfortably alongside the protections athletes would expect in national courts. The World Anti-Doping Agency's 2025 Code revisions, now in their second year of implementation, have generated significant controversy — praised by some for closing loopholes that sophisticated doping schemes had exploited, and criticised by others for further tilting an already unbalanced system against individual athletes.
What Changed in the 2025 WADA Code
The most significant substantive changes in the 2025 Code address four areas. The first is the expansion of the "whereabouts" requirement — the obligation on certain athletes to provide advance notification of their location for out-of-competition testing. The revised Code expands the categories of athletes subject to registered testing pools and tightens the consequences for missed tests and filing failures. Critics, including the Athletes' Commission at the International Olympic Committee, argued during the consultation process that the expanded whereabouts burden on amateur and semi-professional athletes is disproportionate and discriminatory.
The second major change concerns "non-analytical adverse findings" — cases where WADA or a national agency pursues a doping violation based on evidence other than a positive test. The evidentiary standard for these cases has been revised in a direction that makes it easier to bring cases on circumstantial evidence, including statistical analysis of biological passport data, financial records suggesting payments to prohibited substance suppliers, and communications intelligence. Several sports law practitioners have argued that this expansion of non-analytical cases creates significant due process concerns.
The third change relates to the Therapeutic Use Exemption (TUE) process, which has been tightened following high-profile cases in which TUEs were granted for substances with significant performance-enhancing potential. The revised process imposes stricter diagnostic documentation requirements and shorter exemption periods, requiring more frequent renewal. Athletes with genuine medical conditions that require prohibited substances face a more burdensome exemption process as a consequence.
The fourth change — and perhaps the most legally controversial — is the revised whistleblower protection framework. The Code now includes provisions designed to protect and incentivise those who report anti-doping violations. The concern raised by defence attorneys is that the provisions create financial incentives for informants whose evidence may be unreliable or motivated by competitive or personal animus.
The Due Process Problem in Anti-Doping Proceedings
The fundamental legal tension in anti-doping law has not been resolved by the 2025 Code — if anything, it has been sharpened. The tension is this: anti-doping proceedings are not criminal prosecutions, so the full apparatus of criminal due process — presumption of innocence beyond reasonable doubt, exclusion of illegally obtained evidence, right to confront accusers — does not apply. But they can result in consequences — multi-year bans, career destruction, public findings of fault — that are in practical terms at least as severe as many criminal sanctions.
The Court of Arbitration for Sport has for years wrestled with how to apply procedural fairness principles in this context. Several 2025 and 2026 CAS decisions have pushed back on procedural shortcuts in national federation proceedings, requiring stricter adherence to the notification requirements, disclosure obligations, and hearing procedures specified in the Code. Athletes and their legal representatives should scrutinise the procedural compliance of any doping proceeding against them with the same care they give to the substantive evidence — procedural violations have resulted in case dismissals and sanction reductions in multiple recent proceedings.
The Contamination Defence in 2026
The contamination defence — the argument that a prohibited substance entered an athlete's system through a contaminated supplement or food source rather than intentional doping — remains the most commonly successful defence in anti-doping cases. The 2025 Code has made contamination defences slightly harder to establish by raising the evidentiary standard for the "no fault or negligence" finding. However, CAS panels have continued to accept well-documented contamination cases, and the infrastructure for building these cases — supplement testing laboratories, supply chain documentation services, and expert testimony on contamination mechanisms — has become more sophisticated and widely available.
Practical Rights Every Athlete Should Know
Athletes subject to the WADA Code have specific procedural rights that are frequently underutilised. You have the right to have a sample B analysis conducted in the presence of your representative. You have the right to request all documentation relating to the collection, storage, and analysis of your sample. You have the right to a hearing before any provisional suspension becomes a full sanction. You have the right to independent legal representation at every stage of the process. And you have the right to appeal any decision to CAS, which provides an independent review on both the facts and the law. Knowing these rights and exercising them promptly is not an admission of anything — it is the responsible exercise of your procedural entitlements in a system that is consequential enough to require your full engagement.
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