Some of the specific updates include the waiving of the month testing availability requirement for new athletes if they are fighting on short notice.
Athletes entering the USADA Registered Testing Pool (RTP) who “voluntarily and promptly” disclose prior use of an illegal substance or method will not be sanctioned if USADA determines the use occurred prior to entering the RTP.
The notice requirements for new and returning athletes have now been strengthened.
Retired or inactive fighters must give notice to resume competing and must be in the RTP for six months before their next fight, although USADA can grant an exemption in “exceptional circumstances or where the strict application of that rule would be manifestly unfair to an athlete.”
Fighters who have been cut by the UFC (or by “UFC-initiated activity”) cannot fight in the UFC again until a new agreement has been agreed and have been made available for testing in the RTP for one month prior to their next bout. The only exception is if they are replacing a fighter on short notice.
The complete list of updates is available here.