FINA, the worldwide swimming federation, has barred transgender girls from competing if they’ve gone by male puberty.

The brand new coverage, introduced Sunday by the federation, requires that transgender athletes eager to compete in girls’s competitions have both by no means gone by male puberty, or that they’d it suppressed on the stage when bodily modifications start to seem, or earlier than the age of 12, whichever occurred later.

Such athletes can even should show to the federation that they’ve repeatedly suppressed their testosterone ranges since that point.

“We’ve got to guard the rights of our athletes to compete, however we even have to guard aggressive equity at our occasions, particularly the ladies’s class at FINA competitions,” Husain al-Musallam, the president of the federation mentioned in assertion.

Lia Thomas, the transgender lady on the College of Pennsylvania’s swim workforce, has grow to be the face of the controversy over sports activities and gender identification. She gained the N.C.A.A. championship within the 500-yard girls’s freestyle this 12 months after beforehand being ranked sixty fifth whereas competing within the males’s division. In March, she mentioned she had aspirations to swim on the U.S. Olympic trials.

FINA is taking a look at a further, open class, al-Musallam added, to allow each athlete “the chance to compete at an elite stage.”

FINA Members Federations voted Sunday to undertake the coverage, the group mentioned within the assertion, including that 71.5 % of members had been in favor of adopting it.

The coverage was devised by a working group arrange in November that included athletes, scientists and medical and authorized specialists, it added.

The brand new coverage will go into impact Monday.

It is a creating story. Examine again for updates.