If any owner, trainer, or driver of a horse shall threaten or join with others in threatening not to race, or not to declare in, because of the entry of a certain horse or horses, or a particular stable, thereby compelling or trying to compel the racing secretary to reject certain eligible entries, it shall be immediately reported to the state steward and the offending parties may be suspended pending a hearing.
Ill. Admin. Code tit. 11, § 1320.30