The Horse Racing Integrity and Safety Authority (HISA) has changed their provisional suspension policy regarding banned substances and will now wait to suspend a trainer until the split (B) sample is returned, according to a press release from HISA Friday morning. "Last Friday, HIWU was informed that a split (B) sample did not confirm the original laboratory finding, and, accordingly, pursuant to the ADMC regulations, HIWU dismissed the violation against a trainer who had been provisionally suspended 20 days earlier," the statement read. "This raised concerns regarding the imposition of...