from the article:
"With the ‘B’ sample confirming the positive test, Jones will now begin his adjudication process with USADA, the UFC’s anti-doping partner. It’s unclear how long that will take. Jones’ disciplinary hearing in front of the California State Athletic Commission (CSAC), which also has jurisdiction in the case, is currently in line to be Oct. 17 in Los Angeles, but that could change.
Jones is facing up to a four-year suspension from USADA, since he is a repeat offender. Last year, he tested positive for the banned substances clomiphene and Letrozol and was handed a one-year suspension.
Arbitrators ruled in 2016 that Jones was reckless in taking a sexual-enhancement pill that was contaminated with the two substances. Once again, with this latest test failure, Jones’ team is saying he ingested the steroid unknowingly, possibly via a tainted supplement.
In the main event of UFC 214 in Anaheim, Calif., Jones beat
Daniel Cormier to re-gain the UFC light heavyweight title. He has yet to be stripped of the belt, pending the USADA adjudication process. Jones’ victory, though, is likely to be overturned into a no contest by CSAC."
edit: source
https://www.mmafighting.com/2017/9/12/16291440/jon-jones-b-sample-comes-back-positive-for-steroid