The Electronic Sports League (ESL) has recently decided to start testing for drugs during its tournaments. http://motherboard.vice.com/read/after-adderall-scandal-espo... They will be using this list to test players http://list.wada-ama.org/
That exception wouldn't technically cover trans women because we often take spironolactone to totally eliminate testosterone rather than because it's missing. Apparently, it's banned because it's used by athletes to hide their past usage of forbidden steroids.
https://www.reddit.com/r/GlobalOffensive/comments/3gmog8/esl...
Still, it's much better than nothing.