Trifecta wagering shall not be scheduled on a thoroughbred or standardbred race unless at least five betting interests are carded. In the event of a scratch, trifecta wagering on a thoroughbred or standardbred race in which four betting interests remain is permissible.
Ill. Admin. Code tit. 11, § 306.30
Amended at 34 Ill. Reg. 11436, effective July 22, 2010