W. Va. Code § 17A-3A-2: Consumer disclosure.

Before a motor vehicle not originally manufactured in accordance with the laws and regulations of the United States Clean Air Act and the Motor Vehicle Safety Act can be sold to a consumer in this state, the seller must provide the purchaser with full written disclosure of all modifications performed to the vehicle. This disclosure consists of a description phrased in terms reasonably understandable to a consumer with no specialized technical training, accompanied by a copy of the technical submissions made to the environmental protection agency and Department of Transportation in order to obtain certification of compliance. Failure to make this disclosure renders the sale voidable.