11 Va. Admin. Code § 10-150-70
No driver may be changed without the permission of the stewards and for good cause. A person who causes a driver change after the daily racing program has been printed shall be subject to disciplinary action.
§ 59.1-369 of the Code of Virginia.
Derived from VR662-05-02 § 2.6, eff. July 15, 1991.