From USADA after this interview:
“While we meet with all athletes who enter or re-enter the testing pool, we do not currently have a meeting set with Conor and, as of today, we have not received notice of his coming out of retirement to compete.”
“The UFC rules are clear that, in addition to two negative tests, an athlete must make themself available for testing for six months before returning to competition. This is a fair way to ensure an athlete does not use the retirement status to gain an unfair advantage by using prohibited substances during the retirement period, which would enhance their performance unfairly if the ultimately decide to return to competition. While the rules permit the UFC to make an exception to the six-month rule in exceptional circumstances, when the strict application of the rule would be manifestly unfair to the athlete, our position, which we have made clear, is that Conor should be in the testing pool for the full six-month period.”