One of Keith Kizer's last acts as chairman of the NSAC was to sanction a surprise test on Belfort when he was at the MMA awards in Vegas a few weeks ago, however as Belfort does not have a license with the NSAC the result can't be made public if he were to apply for a license then the result could be made known, Belfort withdrawing from his fight with Weidman means he doesn't have to apply for one atm, listening to a podcast earlier Dave Meltzer of mmafighting very strongly implied he failed the test.