What’s Happening With That Rule? Provisional Suspensions for Key Substances
by Natalie Voss | January 21, 2026
Please note that as of March 2026, a second draft of this rule change proposal has been issued in response to committee and member feedback. The new version of the proposal limits the provisional suspension to the horse and the trainer, and does not impose it until after the B sample has been returned. This version of the rule will be available for member comment through April 19. This week, we’re debuting a new series about proposed rule changes. Rule changes go through a long process












