ARSD 20:04:30:100. Twin trifecta tickets on scratched horse to be refunded in first race and exchanged in second race

If a horse is scratched in the first race of the twin trifecta, all twin trifecta tickets on the scratched horse shall be refunded. If a horse is scratched in the second race of the twin trifecta, public address announcements shall be made and time given for exchange of tickets on the scratched horse.