You do have to fine tune it. We are seeing an example now. It usually comes up with runners like Semenya . She did a lot of legal fighting but has to follow the testosterone level requirement.
In this case..if boxer is XY then the decision is easy. Should not be allowed.
But if boxer is intersex they need to make rules like those that were put in place for the runners .
It is more important when you are dealing with physical contact sports.
I believe there is also a story about a volleyball player being paralyzed when hit with a ball from a transgender player.