11 Va. Admin. Code § 10-160-110
If a jockey weighs in at less than the weight at which he weighed out, the horse shall be disqualified unless the stewards are satisfied that such shortness of weight was caused by exceptional circumstances.
§ 59.1-369 of the Code of Virginia.
Derived from VR662-05-03 § 11, eff. September 26, 1991.