To prevent re-entry in the pari-mutuel system for duplicate cashing, each cashed or refunded ticket shall be marked to indicate that it has been cashed or refunded such as tearing a corner in a manner which will not destroy the identity of the ticket, or by computer imprint. If a ticket is not marked, the totalizator licensee shall track the ticket and maintain a computer record of the ticket.
Ill. Admin. Code tit. 11, § 433.100