And say good-bye to their athletic scholarships?
The organizations that now certify transgender race results need to be convinced to change their rules. That might be legally messy. It's not obvious to me what the best solution would be.
They could just refuse to swim. If the coach threatened them with the cancelation of their scholarships they can remind him that they did not decide to go to that college to swim against a guy pretending to be a girl.
Their entire memory of swimming there is marred by seeing Lia taking a shower and having to look at his weiner.