This entire thing is disturbing. A sub-elite male could easily self-identify as a female, never do any other marathons besides Boston, and win the women's race since there are no hormone requirements to meet. This sets a very dangerous precedent.
A 2:19 male runner can self-identify with no steps taken to reduce their testosterone levels and have their name forever etched in history as the Boston Marathon women's record holder..if not the world record holder for women.
If prize money is involved a guy can't just show up and claim to be a woman: