@eleeski look again. the IAAF has announced new requirements, mostly because of Caster Semenya, which she is challenging in court. They have lowered the amount of testosterone for female athletes in certain disiplines to 5nmol from 10.
see: https://www.theguardian.com/sport/2018/apr/25/iaaf-testosterone-rules-caster-semenya
good luck keeping women involved in sport if this is not nipped in the bud IMO... hard enough as it is to attract female athletes, especially waterskiing! As a male athlete I could give a damn and frankly with only 1 or 2 people to ski against at most comps, bring it on!
There are more than enough women who can kick my ass running buoys and do so on a regular basis!
for sports like running, there is little on the line, but in other sports like say MMA, lives are on the line. A biological male fighter who's transitioned could easily kill a female fighter, its not even close to being fair or safe.