What is HISA?
HISA represents an anti-doping act for horseracing by the Racetrack Safety program. Individual states currently run a doping program, but as of 2023 (Jan 1), states will no longer have a separate ruling for doping.
These rules are to be enforced nationally. Each state currently has different rules, and they are pushing that in 2023 all states will no longer have rules for each state, but HISA will be the governing body. The USEF (United States Equestrian Federation) also did this with the Microchip.