Staples Center The California state senate on Thursday passed a UFC-backed bill that allows the commission to withhold 40 percent of a licensee’s pay in the event of a positive drug test. Previously, the commission could take up to $2,500. If, for example, January’s UFC 183 had been regulated by the CSAC, the commission could have withheld $520,000 following the positive tests of ex-champ Anderson Silva and Nick Diaz, though the seized money is separate from the CSAC’s general fund and can’t be used to bankroll future testing.