evidence: Swimmer Lia Thomas' case against World Aquatics transgender athlete rules dismissed Lia Thomas' attempt to challenge World Aquatics' policy for transgender athletes has been dismissed. Thomas, a transgender woman, argued the ruling was discriminatory and took legal action against it earlier this year, but the Court of Arbitration for Sport ruled this week she is not entitled to challenge the rules. Thomas has not registered to compete in any World Aquatics events and is no longer a member of US Swimming, according to the ruling obtained by CBS News. Thomas, the court said, is "not sufficiently affected by the rules" and therefore cannot challenge them.