Okla. Admin. Code § 325:75-1-7
Unless the breeder or owner of an Oklahoma-Bred racing stock has accredited the horse with the official Oklahoma-Bred Registering Agency and attested that the horse is an Oklahoma-Bred, and unless the horse's official Certificate of Registration has been affixed with the Oklahoma-Bred Program Stamp to complete the enrollment process for Oklahoma-Bred racing stock, such horse is ineligible to start in races for Oklahoma-Bred horses and ineligible for Oklahoma-Bred purse supplements. An accredited racing stock horse shall be considered eligible to start in races for Oklahoma-Bred horses and earn Oklahoma-Bred purse supplements if the official Certificate of Registration has been re-issued by the national breed registry and has not been affixed with the Oklahoma-Bred Program Stamp so long as the official Oklahoma-Bred Registering Agency can verify the eligibility of the horse. Unless the owner of an Oklahoma-Bred stallion or broodmare has accredited the horse with the official Oklahoma-Bred Registering Agency and attested that the horse is in compliance with the rules of the Oklahoma-Bred Program such horse is ineligible for Oklahoma-Bred stallion or broodmare awards. The Registering Agency will verify the current eligibility of a participating horse prior to distributing any purse supplement, stake, reward or award from the Oklahoma Breeding Development Fund Special Account.
Okla. Admin. Code § 325:75-1-7