Every week, the TDN posts a roundup of the relevant Horseracing Integrity and Safety Act (HISA) related rulings from around the country. Among this week's rulings, trainer Pavel Matejka has four separate pending cases issued against him for cannabidiol (CBD) positives. The four cases occurred between Feb. 17 and March 15. Under HISA, CBD is classified a Class B controlled substance, a first offense for which comes with a possible 15-day suspension and $1,000 fine. The massive proliferation in CBD products for humans has spilled over into the equine world....