Swim England announced an updated transgender and nonbinary policy on Monday with a "female" category restricted to athletes with a declared birth sex of female and a new "open" category for everyone else.
The national governing body for swimming in England said the policy, which comes into effect in September, would apply to its swimming, artistic swimming, diving and water polo competitions.
The "open" category will be for those with a birth sex of male, trans or nonbinary competitors.