steward, or other racing official that involved interpreting the rules of horse racing and making judgments OR the equivalent of five years of full-time experience in the pari-mutuel horse racing industry in a non-official capacity that still involved interpreting the rules of horse racing, such as a jockey, trainer, owner, and closely related occupation. Knowledge of horse racing operation including but not limited to: pari-mutuel wagering, security procedures, medication used in racehorses, mutuel department operation, the roles of owners, trainers, and jockeys.