The Commission or the Stewards may require that a Jockey, Apprentice Jockey, or Exercise Rider be examined by a medical professional at any time; be required to provide a copy of a physical examination; or submit a release-to-work document prior to returning to work when previously injured. The Commission or the Stewards may refuse to allow that person to ride until s/he has satisfied these requirements.
Okla. Admin. Code § 325:15-5-15